root is mounted read-only by default; replace bflush with vflushbuf

[unix-history] / usr / src / sys / ufs / lfs / lfs_vfsops.c

diff --git a/usr/src/sys/ufs/lfs/lfs_vfsops.c b/usr/src/sys/ufs/lfs/lfs_vfsops.c
index bbdd699..5bb12cb 100644 (file)
--- a/usr/src/sys/ufs/lfs/lfs_vfsops.c
+++ b/usr/src/sys/ufs/lfs/lfs_vfsops.c
@@ -1,159 +1,236 @@
 /*
 /*

- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.

  *
  *

- *     @(#)lfs_vfsops.c        7.3 (Berkeley) %G%
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *     @(#)lfs_vfsops.c        7.31 (Berkeley) %G%

  */
 
 #include "param.h"
 #include "systm.h"
  */
 
 #include "param.h"
 #include "systm.h"

-#include "dir.h"
-#include "user.h"
-#include "inode.h"
-#include "proc.h"
-#include "fs.h"
-#include "buf.h"
+#include "time.h"
+#include "kernel.h"
+#include "namei.h"
+#include "vnode.h"

 #include "mount.h"
 #include "mount.h"

+#include "buf.h"
+#include "ucred.h"

 #include "file.h"
 #include "file.h"

-#include "conf.h"
-#include "ioctl.h"

 #include "disklabel.h"
 #include "disklabel.h"

-#include "stat.h"
+#include "ioctl.h"
+#include "errno.h"
+#include "malloc.h"
+#include "../ufs/fs.h"
+#include "../ufs/ufsmount.h"
+#include "../ufs/inode.h"

 #include "ioctl.h"
 #include "disklabel.h"
 #include "stat.h"
 
 #include "ioctl.h"
 #include "disklabel.h"
 #include "stat.h"
 

-smount()
+/*
+ * ufs vfs operations.
+ */
+int ufs_mount();
+int ufs_start();
+int ufs_unmount();
+int ufs_root();
+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_statfs,
+       ufs_sync,
+       ufs_fhtovp,
+       ufs_vptofh,
+       ufs_init
+};
+
+/*
+ * ufs mount table.
+ */
+struct ufsmount mounttab[NMOUNT];
+
+/*
+ * 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 = (struct a *)u.u_ap;
-       dev_t dev;
-       register struct inode *ip;
+       register struct mount *mp;
+       extern struct vnode *rootvp;
+       struct ufsmount *ump;

        register struct fs *fs;
        register struct fs *fs;

-       register struct nameidata *ndp = &u.u_nd;
-       u_int len;
+       u_int size;
+       int error;

 
 

-       u.u_error = getmdev(&dev, uap->fspec);
-       if (u.u_error)
-               return;
-       ndp->ni_nameiop = LOOKUP | FOLLOW;
-       ndp->ni_segflg = UIO_USERSPACE;
-       ndp->ni_dirp = (caddr_t)uap->freg;
-       ip = namei(ndp);
-       if (ip == NULL)
-               return;
-       if (ip->i_count != 1) {
-               iput(ip);
-               u.u_error = EBUSY;
-               return;
+       mp = (struct mount *)malloc((u_long)sizeof(struct mount),
+               M_MOUNT, M_WAITOK);
+       mp->m_op = &ufs_vfsops;
+       mp->m_flag = M_RDONLY;
+       mp->m_exroot = 0;
+       mp->m_mounth = (struct vnode *)0;
+       error = mountfs(rootvp, mp);
+       if (error) {
+               free((caddr_t)mp, M_MOUNT);
+               return (error);

        }
        }

-       if ((ip->i_mode&IFMT) != IFDIR) {
-               iput(ip);
-               u.u_error = ENOTDIR;
-               return;
+       if (error = vfs_lock(mp)) {
+               (void)ufs_unmount(mp, 0);
+               free((caddr_t)mp, M_MOUNT);
+               return (error);

        }
        }

-       fs = mountfs(dev, uap->ronly, ip);
-       if (fs == 0)
-               return;
-       (void) copyinstr(uap->freg, fs->fs_fsmnt, sizeof(fs->fs_fsmnt)-1, &len);
-       bzero(fs->fs_fsmnt + len, sizeof (fs->fs_fsmnt) - len);
+       rootfs = mp;
+       mp->m_next = mp;
+       mp->m_prev = mp;
+       mp->m_vnodecovered = (struct vnode *)0;
+       ump = VFSTOUFS(mp);
+       fs = ump->um_fs;
+       fs->fs_fsmnt[0] = '/';
+       bzero(fs->fs_fsmnt + 1, sizeof(fs->fs_fsmnt) - 1);
+       (void) copystr(ROOTNAME, ump->um_mntname, MNAMELEN - 1, &size);
+       bzero(ump->um_mntname + size, MNAMELEN - size);
+       vfs_unlock(mp);
+       inittodr(fs->fs_time);
+       return (0);

 }
 
 }
 

-/* this routine has races if running twice */
-struct fs *
-mountfs(dev, ronly, ip)
-       dev_t dev;
-       int ronly;
-       struct inode *ip;
+/*
+ * VFS Operations.
+ *
+ * mount system call
+ */
+ufs_mount(mp, path, data, ndp)
+       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);
+       if ((error = getmdev(&devvp, args.fspec, ndp)) != 0)
+               return (error);
+       if ((mp->m_flag & M_UPDATE) == 0) {
+               error = mountfs(devvp, mp);
+       } else {
+               ump = VFSTOUFS(mp);
+               fs = ump->um_fs;
+               if (fs->fs_ronly && (mp->m_flag & M_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 (devvp != ump->um_devvp)
+                       error = EINVAL; /* needs translation */
+       }
+       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);
+       (void) copyinstr(args.fspec, ump->um_mntname, MNAMELEN - 1, &size);
+       bzero(ump->um_mntname + size, MNAMELEN - size);
+       return (0);
+}
+
+/*
+ * Common code for mount and mountroot
+ */
+mountfs(devvp, mp)
+       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 *fmp = NULL;
+       struct buf *bp = NULL;

        register struct fs *fs;
        register struct fs *fs;

+       dev_t dev = devvp->v_rdev;

        struct partinfo dpart;
        int havepart = 0, blks;
        struct partinfo dpart;
        int havepart = 0, blks;

-       caddr_t space;
-       int i, size;
-       register error;
+       caddr_t base, space;
+       int havepart = 0, blks;
+       int error, i, size;

        int needclose = 0;
        int needclose = 0;

+       int ronly = (mp->m_flag & M_RDONLY) != 0;

 
 

-       error =
+       for (ump = &mounttab[0]; ump < &mounttab[NMOUNT]; ump++) {
+               if (ump->um_fs == NULL) {
+                       if (fmp == NULL)
+                               fmp = ump;
+               } else if (dev == ump->um_dev) {
+                       return (EBUSY);         /* needs translation */
+               }
+       }

            (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE,
                S_IFBLK);
            (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE,
                S_IFBLK);

-       if (error)
-               goto out;
+       if (error) {
+               ump->um_fs = NULL;
+               return (error);
+       }

        needclose = 1;
        needclose = 1;

-       if ((*bdevsw[major(dev)].d_ioctl)(dev, DIOCGPART,
-           (caddr_t)&dpart, FREAD) == 0) {
-               havepart = 1;
-               size = dpart.disklab->d_secsize;
-       } else
+       if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED) != 0)

                size = DEV_BSIZE;
                size = DEV_BSIZE;

-#ifdef SECSIZE
-       /*
-        * If possible, determine hardware sector size
-        * and adjust fsbtodb to correspond.
-        */
-#endif SECSIZE
-       if ((*bdevsw[major(dev)].d_ioctl)(dev, DIOCGPART,
-           (caddr_t)&dpart, FREAD) == 0) {
+       else {

                havepart = 1;
                size = dpart.disklab->d_secsize;
                havepart = 1;
                size = dpart.disklab->d_secsize;

-#ifdef SECSIZE
-               if (size < MINSECSIZE) {
-                       error = EINVAL;
-                       goto out;
-               }
-#endif SECSIZE
-       } else
-               size = DEV_BSIZE;
-#ifdef SECSIZE
-       tp = bread(dev, (daddr_t)(SBOFF / size), SBSIZE, size);
-#else SECSIZE
-       tp = bread(dev, SBLOCK, SBSIZE);
-#endif SECSIZE
-       if (tp->b_flags & B_ERROR)
+       }
+       if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) {
+               ump->um_fs = NULL;

                goto out;
                goto out;

-       for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-               if (mp->m_bufp != 0 && dev == mp->m_dev) {
-                       mp = 0;
-                       error = EBUSY;
-                       goto out;
-               }
-       for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-               if (mp->m_bufp == 0)
-                       goto found;
-       mp = 0;
-       error = EMFILE;         /* needs translation */
-       goto out;
-found:
-       mp->m_bufp = tp;        /* just to reserve this slot */
-       mp->m_dev = NODEV;
-       fs = tp->b_un.b_fs;
-       if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
-           fs->fs_bsize < sizeof(struct fs)) {
-               error = EINVAL;         /* also needs translation */
+       }
+       fs = bp->b_un.b_fs;
+               ump->um_fs = NULL;
+               error = EINVAL;         /* XXX also needs translation */

                goto out;
        }
                goto out;
        }

-       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,
+       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);
           (u_int)fs->fs_sbsize);

-       brelse(tp);
-       tp = 0;
-       fs = bp->b_un.b_fs;
-       fs->fs_ronly = (ronly != 0);
+       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;
        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;

-               fs->fs_dbsize = size;
+               dpart.part->p_cpg = fs->fs_cpg;

        }
 #ifdef SECSIZE
        /*
        }
 #ifdef SECSIZE
        /*


@@ -181,11 +258,8 @@ found:
                fs->fs_dbsize = size;
        }
        blks = howmany(fs->fs_cssize, fs->fs_fsize);
                fs->fs_dbsize = size;
        }
        blks = howmany(fs->fs_cssize, fs->fs_fsize);

-       space = wmemall(vmemall, (int)fs->fs_cssize);
-       if (space == 0) {
-               error = ENOMEM;
-               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)
        for (i = 0; i < blks; i += fs->fs_frag) {
                size = fs->fs_bsize;
                if (i + fs->fs_frag > blks)


@@ -194,127 +268,234 @@ found:
                tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size,
                    fs->fs_dbsize);
 #else SECSIZE
                tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size,
                    fs->fs_dbsize);
 #else SECSIZE

-               tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size);
-#endif SECSIZE
-               if (tp->b_flags&B_ERROR) {
-                       wmemfree(space, (int)fs->fs_cssize);
+               error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
+                       NOCRED, &bp);
+               if (error) {
+                       free((caddr_t)base, M_SUPERBLK);

                        goto out;
                }
                        goto out;
                }

-               bcopy((caddr_t)tp->b_un.b_addr, space, (u_int)size);
+               bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size);

                fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
                space += 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;
-               cacheinval(ip);
-               iunlock(ip);
+               brelse(bp);
+               bp = NULL;

        }
        }

+       mp->m_data = (qaddr_t)ump;
+       mp->m_bsize = fs->fs_bsize;
+       mp->m_fsize = fs->fs_fsize;
+       mp->m_fsid.val[0] = (long)dev;
+       mp->m_fsid.val[1] = MOUNT_UFS;
+       ump->um_mountp = mp;
+       ump->um_dev = dev;
+       ump->um_devvp = devvp;
+       ump->um_qinod = NULL;
+       devvp->v_mounton = mp;
+

        /* 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 */
        /* 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 (fs);
+       return (0);

 out:
 out:

-       if (error == 0)
-               error = EIO;
-       if (needclose)
-               (void) closei((dev_t)ip->i_rdev, IFBLK,
-                   ronly? FREAD : FREAD|FWRITE);

        if (needclose)
        if (needclose)

-               (void) closei((dev_t)ip->i_rdev, IFBLK,
-                   ronly? FREAD : FREAD|FWRITE);
-       if (ip)
-               iput(ip);
-       if (mp)
-               mp->m_bufp = 0;
+               (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED);
+       if (ump->um_fs) {
+               free((caddr_t)ump->um_fs, M_SUPERBLK);
+               ump->um_fs = NULL;
+       }

        if (bp)
                brelse(bp);
        if (bp)
                brelse(bp);

-       if (tp)
-               brelse(tp);
-       u.u_error = error;
-       return (0);
+       return (error);

 }
 
 }
 

-umount()
+/*
+ * Make a filesystem operational.
+ * Nothing to do at the moment.
+ */
+/* ARGSUSED */
+ufs_start(mp, flags)
+       struct mount *mp;
+       int flags;

 {
 {

-       struct a {
-               char    *fspec;
-       } *uap = (struct a *)u.u_ap;

 
 

-       u.u_error = unmount1(uap->fspec, 0);
+       return (0);

 }
 
 }
 

-unmount1(fname, forcibly)
-       caddr_t fname;
-       int forcibly;
+/*
+ * unmount system call
+ */
+ufs_unmount(mp, flags)
+       struct mount *mp;
+       int flags;

 {
 {

-       dev_t dev;
-       register struct mount *mp;
-       int error;
-       register struct inode *ip;
+       register struct ufsmount *ump;

        register struct fs *fs;
        register struct fs *fs;

+       int error, ronly;

 
 

-       forcibly = 0;                                   /* XXX */
-       forcibly = 0;                                   /* XXX */
-       error = getmdev(&dev, fname);
-       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 */
-       nchinval(dev);  /* flush the name cache */
-       update();
-#ifdef QUOTA
-       if ((error = iflush(dev, mp->m_qinod)) && !forcibly)
-#else
-       if ((error = iflush(dev)) && !forcibly)
-#endif
+       if (flags & MNT_FORCE)
+               return (EINVAL);
+       mntflushbuf(mp, 0);
+       if (mntinvalbuf(mp))
+               return (EBUSY);
+       ump = VFSTOUFS(mp);
+       if (error = vflush(mp, ITOV(ump->um_qinod), flags))

                return (error);
 #ifdef QUOTA
                return (error);
 #ifdef QUOTA

-       closedq(mp);
+       (void) closedq(ump);

        /*
        /*

-        * 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.
         */
         * A drag, but it would be ugly to cheat, & this doesn't happen often.
         */

-       (void)iflush(dev, (struct inode *)NULL);
+       if (vflush(mp, (struct vnode *)NULL, MNT_NOFORCE))
+               panic("ufs_unmount: quota");

 #endif
 #endif

-       ip = mp->m_inodp;
-       ip->i_flag &= ~IMOUNT;
-       fs = mp->m_bufp->b_un.b_fs;
-       wmemfree((caddr_t)fs->fs_csp[0], (int)fs->fs_cssize);
-       brelse(mp->m_bufp);
-       mp->m_bufp = 0;
-       mp->m_dev = 0;
-       mpurge(mp - &mount[0]);
+       fs = ump->um_fs;
+       ronly = !fs->fs_ronly;
+       free((caddr_t)fs->fs_csp[0], M_SUPERBLK);

        error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE);
        irele(ip);
        return (error);
 }
 
        error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE);
        irele(ip);
        return (error);
 }
 

-sbupdate(mp)
+/*
+ * Return root of a filesystem
+ */
+ufs_root(mp, vpp)
+       struct mount *mp;
+       struct vnode **vpp;
+{
+       register struct inode *ip;
+       struct inode *nip;
+       struct vnode tvp;
+       int error;
+
+       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);
+       *vpp = ITOV(nip);
+       return (0);
+}
+
+/*
+ * 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;
+       bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
+       bcopy((caddr_t)ump->um_mntname, (caddr_t)&sbp->f_mntfromname[0],
+               MNAMELEN);
+       return (0);
+}
+
+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.
+ */
+ufs_sync(mp, waitfor)

        struct mount *mp;
        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;
+       static int updlock = 0;
+
+       if (syncprt)
+               bufstats();
+       if (updlock)
+               return (EBUSY);
+       fs = ump->um_fs;
+       if (fs == (struct fs *)1)
+               return (0);
+       updlock++;
+       /*
+        * 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;
+               error = sbupdate(ump, waitfor);
+       }
+       /*
+        * Write back each (modified) inode.
+        */
+       for (vp = mp->m_mounth; vp; vp = vp->v_mountf) {
+               ip = VTOI(vp);
+               if ((ip->i_flag & ILOCKED) != 0 || vp->v_count == 0 ||
+                   (ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0)
+                       continue;
+               VREF(vp);
+               VOP_LOCK(vp);
+               if (error = VOP_FSYNC(vp, 0, NOCRED, MNT_NOWAIT))
+                       allerror = error;
+               vput(vp);
+       }
+       updlock = 0;
+       /*
+        * Force stale file system control information to be flushed.
+        */
+       vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0);
+       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;
        register struct buf *bp;
        int blks;
        caddr_t space;

-       int i, size;
+       int i, size, error = 0;

 
 #ifdef SECSIZE
        bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize),
            (int)fs->fs_sbsize, fs->fs_dbsize);
 #else SECSIZE
 
 #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->m_dev, SBLOCK, (int)fs->fs_sbsize);
+       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);
 #endif SECSIZE
        bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize);

+       /* 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 */
 #ifdef SECSIZE
 #ifdef tahoe
        /* restore standard fsbtodb shift */


@@ -322,7 +503,10 @@ sbupdate(mp)
        bp->b_un.b_fs->fs_sparecon[0] = 0;
 #endif
 #endif SECSIZE
        bp->b_un.b_fs->fs_sparecon[0] = 0;
 #endif
 #endif SECSIZE

-       bwrite(bp);
+       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) {
        blks = howmany(fs->fs_cssize, fs->fs_fsize);
        space = (caddr_t)fs->fs_csp[0];
        for (i = 0; i < blks; i += fs->fs_frag) {


@@ -333,46 +517,148 @@ sbupdate(mp)
                bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size,
                    fs->fs_dbsize);
 #else SECSIZE
                bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size,
                    fs->fs_dbsize);
 #else SECSIZE

-               bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size);
+               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;
 #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 = (struct vnode *)0;
+               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 = (struct vnode *)0;
+               return (error);

        }
        }

+       ip = nip;
+       if (ip->i_mode == 0) {
+               iput(ip);
+               *vpp = (struct vnode *)0;
+               return (EINVAL);
+       }
+       if (ip->i_gen != ufhp->ufid_gen) {
+               iput(ip);
+               *vpp = (struct vnode *)0;
+               return (EINVAL);
+       }
+       *vpp = ITOV(ip);
+       return (0);

 }
 
 /*
 }
 
 /*

- * Common code for mount and umount.
+ * 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 quota.

  * Check that the user's argument is a reasonable
  * thing on which to mount, and return the device number if so.
  */
  * Check that the user's argument is a reasonable
  * thing on which to mount, and return the device number if so.
  */

-getmdev(pdev, fname)
+getmdev(devvpp, fname, ndp)
+       struct vnode **devvpp;

        caddr_t fname;
        caddr_t fname;

-       dev_t *pdev;
+       register struct nameidata *ndp;

 {
 {

-       dev_t dev;
-       register struct inode *ip;
-       register struct nameidata *ndp = &u.u_nd;
+       register struct vnode *vp;
+       int error;

 
 

-       if (!suser())
-               return (u.u_error);
-       ndp->ni_nameiop = LOOKUP | FOLLOW;
+       ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW;

        ndp->ni_segflg = UIO_USERSPACE;
        ndp->ni_dirp = fname;
        ndp->ni_segflg = UIO_USERSPACE;
        ndp->ni_dirp = fname;

-       ip = namei(ndp);
-       if (ip == NULL) {
-               if (u.u_error == ENOENT)
-                       return (ENODEV); /* needs translation */
-               return (u.u_error);
+       if (error = namei(ndp)) {
+               if (error == ENOENT)
+                       return (ENODEV);        /* needs translation */
+               return (error);

        }
        }

-       if ((ip->i_mode&IFMT) != IFBLK) {
-               iput(ip);
+       vp = ndp->ni_vp;
+       if (vp->v_type != VBLK) {
+               vput(vp);

                return (ENOTBLK);
        }
                return (ENOTBLK);
        }

-       dev = (dev_t)ip->i_rdev;
-       iput(ip);
-       if (major(dev) >= nblkdev)
+       if (major(vp->v_rdev) >= nblkdev) {
+               vput(vp);

                return (ENXIO);
                return (ENXIO);

-       *pdev = dev;
+       }
+       iunlock(VTOI(vp));
+       *devvpp = vp;

        return (0);
 }
        return (0);
 }