pass V_SAVE to vinvalbuf

[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 10ac271..34aac29 100644 (file)
--- a/usr/src/sys/ufs/lfs/lfs_vfsops.c
+++ b/usr/src/sys/ufs/lfs/lfs_vfsops.c
@@ -1,290 +1,521 @@
 /*
 /*

- * 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, 1991, 1993
+ *     The Regents of the University of California.  All rights reserved.

  *
  *

- *     @(#)lfs_vfsops.c        7.2 (Berkeley) %G%
+ * %sccs.include.redist.c%
+ *
+ *     @(#)lfs_vfsops.c        8.6 (Berkeley) %G%

  */
 
  */
 

-#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 "mount.h"
-#include "file.h"
-#include "conf.h"
-
-smount()
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/kernel.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/buf.h>
+#include <sys/mbuf.h>
+#include <sys/file.h>
+#include <sys/disklabel.h>
+#include <sys/ioctl.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/socket.h>
+
+#include <miscfs/specfs/specdev.h>
+#include "ioctl.h"
+#include "disklabel.h"
+#include "stat.h"
+
+#include <ufs/ufs/quota.h>
+#include <ufs/ufs/inode.h>
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/ufs_extern.h>
+
+#include <ufs/lfs/lfs.h>
+#include <ufs/lfs/lfs_extern.h>
+
+int lfs_mountfs __P((struct vnode *, struct mount *, struct proc *));
+
+struct vfsops lfs_vfsops = {
+       lfs_mount,
+       ufs_start,
+       lfs_unmount,
+       lfs_root,
+       ufs_quotactl,
+       lfs_statfs,
+       lfs_sync,
+       lfs_vget,
+       lfs_fhtovp,
+       lfs_vptofh,
+       lfs_init,
+};
+
+int
+lfs_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 fs *fs;
-       register struct nameidata *ndp = &u.u_nd;
-       u_int len;
-
-       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;
+       panic("lfs_mountroot");         /* XXX -- implement */
+}
+
+/*
+ * VFS Operations.
+ *
+ * mount system call
+ */
+lfs_mount(mp, path, data, ndp, p)
+       register struct mount *mp;
+       char *path;
+       caddr_t data;
+       struct nameidata *ndp;
+       struct proc *p;
+{
+       struct vnode *devvp;
+       struct ufs_args args;
+       struct ufsmount *ump;
+       register struct lfs *fs;                                /* LFS */
+       u_int size;
+       int error;
+
+       if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
+               return (error);
+
+       /* Until LFS can do NFS right.          XXX */
+       if (args.export.ex_flags & MNT_EXPORTED)
+               return (EINVAL);
+
+       /*
+        * If updating, check whether changing from read-only to
+        * read/write; if there is no device name, that's all we do.
+        */
+       if (mp->mnt_flag & MNT_UPDATE) {
+               ump = VFSTOUFS(mp);
+#ifdef NOTLFS                                                  /* LFS */
+               fs = ump->um_fs;
+               if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
+                       fs->fs_ronly = 0;
+#else
+               fs = ump->um_lfs;
+               if (fs->lfs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
+                       fs->lfs_ronly = 0;
+#endif
+               if (args.fspec == 0) {
+                       /*
+                        * Process export requests.
+                        */
+                       return (vfs_export(mp, &ump->um_export, &args.export));
+               }

        }
        }

-       if ((ip->i_mode&IFMT) != IFDIR) {
-               iput(ip);
-               u.u_error = ENOTDIR;
-               return;
+       /*
+        * Not an update, or updating the name: look up the name
+        * and verify that it refers to a sensible block device.
+        */
+       NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
+       if (error = namei(ndp))
+               return (error);
+       devvp = ndp->ni_vp;
+       if (devvp->v_type != VBLK) {
+               vrele(devvp);
+               return (ENOTBLK);
+       }
+       if (major(devvp->v_rdev) >= nblkdev) {
+               vrele(devvp);
+               return (ENXIO);

        }
        }

-       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);
+       if ((mp->mnt_flag & MNT_UPDATE) == 0)
+               error = lfs_mountfs(devvp, mp, p);              /* LFS */
+       else {
+               if (devvp != ump->um_devvp)
+                       error = EINVAL; /* needs translation */
+               else
+                       vrele(devvp);
+       }
+       if (error) {
+               vrele(devvp);
+               return (error);
+       }
+       ump = VFSTOUFS(mp);
+       fs = ump->um_lfs;                                       /* LFS */
+#ifdef NOTLFS                                                  /* LFS */
+       (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, p);
+#else
+       (void)copyinstr(path, fs->lfs_fsmnt, sizeof(fs->lfs_fsmnt) - 1, &size);
+       bzero(fs->lfs_fsmnt + size, sizeof(fs->lfs_fsmnt) - size);
+       bcopy((caddr_t)fs->lfs_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) lfs_statfs(mp, &mp->mnt_stat, p);
+#endif
+       return (0);

 }
 
 }
 

-/* 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
+ * LFS specific
+ */
+int
+lfs_mountfs(devvp, mp, p)
+       register struct vnode *devvp;
+       struct mount *mp;
+       struct proc *p;

 {
 {

-       register struct mount *mp = 0;
-       struct buf *tp = 0;
-       register struct buf *bp = 0;
-       register struct fs *fs;
-       int blks;
-       caddr_t space;
-       int i, size;
-       register error;
-       int needclose = 0;
-
-       error =
-           (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE);
-       if (error)
-               goto out;
-       needclose = 1;
-       tp = bread(dev, SBLOCK, SBSIZE);
-       if (tp->b_flags & B_ERROR)
+       extern struct vnode *rootvp;
+       register struct lfs *fs;
+       register struct ufsmount *ump;
+       struct vnode *vp;
+       struct buf *bp;
+       struct partinfo dpart;
+       dev_t dev;
+       int error, i, ronly, size;
+
+       if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))
+               return (error);
+
+       if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
+               size = DEV_BSIZE;
+       else {
+               size = dpart.disklab->d_secsize;
+#ifdef NEVER_USED
+               dpart.part->p_fstype = FS_LFS;
+               dpart.part->p_fsize = fs->lfs_fsize;    /* frag size */
+               dpart.part->p_frag = fs->lfs_frag;      /* frags per block */
+               dpart.part->p_cpg = fs->lfs_segshift;   /* segment shift */
+#endif
+       }
+
+       /* Don't free random space on error. */
+       bp = NULL;
+       ump = NULL;
+
+       /* Read in the superblock. */
+       if (error = bread(devvp, LFS_LABELPAD / size, LFS_SBPAD, NOCRED, &bp))

                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;
-                       needclose = 0;
-                       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 */
+               error = EINVAL;         /* XXX 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,
-          (u_int)fs->fs_sbsize);
-       brelse(tp);
-       tp = 0;
-       fs = bp->b_un.b_fs;
-       fs->fs_ronly = (ronly != 0);
+
+       /* Allocate the mount structure, copy the superblock into it. */
+       ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
+       fs = ump->um_lfs = malloc(sizeof(struct lfs), M_UFSMNT, M_WAITOK);
+       bcopy(bp->b_data, fs, sizeof(struct lfs));
+       if (sizeof(struct lfs) < LFS_SBPAD)                     /* XXX why? */
+               bp->b_flags |= B_INVAL;
+       brelse(bp);
+       bp = NULL;
+
+       /* Set up the I/O information */
+       fs->lfs_iocount = 0;
+
+       /* Set up the ifile and lock aflags */
+       fs->lfs_doifile = 0;
+       fs->lfs_writer = 0;
+       fs->lfs_dirops = 0;
+       fs->lfs_seglock = 0;
+
+       /* Set the file system readonly/modify bits. */
+       fs->lfs_ronly = ronly;

        if (ronly == 0)
        if (ronly == 0)

-               fs->fs_fmod = 1;
-       blks = howmany(fs->fs_cssize, fs->fs_fsize);
-       space = wmemall(vmemall, (int)fs->fs_cssize);
-       if (space == 0) {
-               error = ENOMEM;
+               fs->lfs_fmod = 1;
+
+       /* Initialize the mount structure. */
+       dev = devvp->v_rdev;
+       mp->mnt_data = (qaddr_t)ump;
+       mp->mnt_stat.f_fsid.val[0] = (long)dev;
+       mp->mnt_stat.f_fsid.val[1] = MOUNT_LFS;
+       mp->mnt_flag |= MNT_LOCAL;
+       ump->um_mountp = mp;
+       ump->um_dev = dev;
+       ump->um_devvp = devvp;
+       ump->um_bptrtodb = 0;
+       ump->um_seqinc = 1 << fs->lfs_fsbtodb;
+       ump->um_nindir = fs->lfs_nindir;
+       for (i = 0; i < MAXQUOTAS; i++)
+               ump->um_quotas[i] = NULLVP;
+       devvp->v_specflags |= SI_MOUNTEDON;
+
+       /*
+        * We use the ifile vnode for almost every operation.  Instead of
+        * retrieving it from the hash table each time we retrieve it here,
+        * artificially increment the reference count and keep a pointer
+        * to it in the incore copy of the superblock.
+        */
+       if (error = VFS_VGET(mp, LFS_IFILE_INUM, &vp))

                goto out;
                goto out;

-       }
-       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);
-                       goto out;
-               }
-               bcopy((caddr_t)tp->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;
-               cacheinval(ip);
-               iunlock(ip);
-       }
-       /* 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 */
-       return (fs);
+       fs->lfs_ivnode = vp;
+       VREF(vp);
+       vput(vp);
+
+
+       return (0);

 out:
 out:

-       if (error == 0)
-               error = EIO;
-       if (ip)
-               iput(ip);
-       if (mp)
-               mp->m_bufp = 0;

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

-       if (tp)
-               brelse(tp);
-       if (needclose) {
-               (*bdevsw[major(dev)].d_close)(dev, ronly? FREAD : FREAD|FWRITE);
-               binval(dev);
+       (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
+       if (ump) {
+               free(ump->um_lfs, M_UFSMNT);
+               free(ump, M_UFSMNT);
+               mp->mnt_data = (qaddr_t)0;
+       }
+       return (error);
+}
+
+/*
+ * unmount system call
+ */
+lfs_unmount(mp, mntflags, p)
+       struct mount *mp;
+       int mntflags;
+       struct proc *p;
+{
+       extern int doforce;
+       register struct ufsmount *ump;
+       register struct lfs *fs;
+       int i, error, flags, ronly;
+
+       flags = 0;
+       if (mntflags & MNT_FORCE) {
+               if (!doforce || (mp->mnt_flag & MNT_ROOTFS))
+                       return (EINVAL);
+               flags |= FORCECLOSE;
+       }
+
+       ump = VFSTOUFS(mp);
+       fs = ump->um_lfs;
+               return (error);
+#ifdef QUOTA
+       if (mp->mnt_flag & MNT_QUOTA) {
+               if (error = vflush(mp, fs->lfs_ivnode, SKIPSYSTEM|flags))
+                       return (error);
+               for (i = 0; i < MAXQUOTAS; i++) {
+                       if (ump->um_quotas[i] == NULLVP)
+                               continue;
+                       quotaoff(p, 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, fs->lfs_ivnode, flags))
+               return (error);
+       fs->lfs_clean = 1;
+       if (error = VFS_SYNC(mp, 1, p->p_ucred, p))
+               return (error);
+       if (fs->lfs_ivnode->v_dirtyblkhd.lh_first)
+               panic("lfs_unmount: still dirty blocks on ifile vnode\n");
+       vrele(fs->lfs_ivnode);
+       vgone(fs->lfs_ivnode);
+
+       ronly = !fs->lfs_ronly;
+ * Get file system statistics.
+ */
+lfs_statfs(mp, sbp, p)
+       struct mount *mp;
+       register struct statfs *sbp;
+       struct proc *p;
+{
+       register struct lfs *fs;
+       register struct ufsmount *ump;
+
+       ump = VFSTOUFS(mp);
+       fs = ump->um_lfs;
+       if (fs->lfs_magic != LFS_MAGIC)
+               panic("lfs_statfs: magic");
+       sbp->f_type = MOUNT_LFS;
+       sbp->f_bsize = fs->lfs_bsize;
+       sbp->f_iosize = fs->lfs_bsize;
+       sbp->f_blocks = dbtofsb(fs,fs->lfs_dsize);
+       sbp->f_bfree = dbtofsb(fs, fs->lfs_bfree);
+       sbp->f_bavail = (fs->lfs_dsize * (100 - fs->lfs_minfree) / 100) -
+               (fs->lfs_dsize - fs->lfs_bfree);
+       sbp->f_bavail = dbtofsb(fs, sbp->f_bavail);
+       sbp->f_files = fs->lfs_nfiles;
+       sbp->f_ffree = sbp->f_bfree * INOPB(fs);
+       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);

        }
        }

-       u.u_error = error;

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

-umount()
+/*
+ * 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'.
+ */
+lfs_sync(mp, waitfor, cred, p)
+       struct mount *mp;
+       int waitfor;
+       struct ucred *cred;
+       struct proc *p;

 {
 {

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

 
 

-       u.u_error = unmount1(uap->fspec, 0);
+       /* All syncs must be checkpoints until roll-forward is implemented. */
+       error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0));
+#ifdef QUOTA
+       qsync(mp);
+#endif
+       return (error);

 }
 
 }
 

-unmount1(fname, forcibly)
-       caddr_t fname;
-       int forcibly;
+/*
+ * Look up an LFS dinode number to find its incore vnode.  If not already
+ * in core, read it in from the specified device.  Return the inode locked.
+ * Detection and handling of mount points must be done by the calling routine.
+ */
+int
+lfs_vget(mp, ino, vpp)
+       struct mount *mp;
+       ino_t ino;
+       struct vnode **vpp;

 {
 {

-       dev_t dev;
-       register struct mount *mp;
-       int stillopen, flag, error;
+       register struct lfs *fs;

        register struct inode *ip;
        register struct inode *ip;

-       register struct fs *fs;
+       struct buf *bp;
+       struct ifile *ifp;
+       struct vnode *vp;
+       struct ufsmount *ump;
+       daddr_t daddr;
+       dev_t dev;
+       int error;
+
+       ump = VFSTOUFS(mp);
+       dev = ump->um_dev;
+       if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
+               return (0);
+
+       /* Translate the inode number to a disk address. */
+       fs = ump->um_lfs;
+       if (ino == LFS_IFILE_INUM)
+               daddr = fs->lfs_idaddr;
+       else {
+               LFS_IENTRY(ifp, fs, ino, bp);
+               daddr = ifp->if_daddr;
+               brelse(bp);
+               if (daddr == LFS_UNUSED_DADDR)
+                       return (ENOENT);
+       }

 
 

-       error = getmdev(&dev, fname);
-       if (error)
+       /* Allocate new vnode/inode. */
+       if (error = lfs_vcreate(mp, ino, &vp)) {
+               *vpp = NULL;

                return (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 ((stillopen = iflush(dev, mp->m_qinod)) < 0 && !forcibly)
-#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
+        * Put it onto its hash chain and lock it so that other requests for
+        * this inode will block if they arrive while we are sleeping waiting
+        * for old data structures to be purged or for the contents of the
+        * disk portion of this inode to be read.

         */
         */

-       (void)iflush(dev, (struct inode *)NULL);
-#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);
+       ip = VTOI(vp);
+       ufs_ihashins(ip);
+
+       /*
+        * XXX
+        * This may not need to be here, logically it should go down with
+        * the i_devvp initialization.
+        * Ask Kirk.
+        */
+       ip->i_lfs = ump->um_lfs;
+
+       /* Read in the disk contents for the inode, copy into the inode. */
+       if (error =
+           bread(ump->um_devvp, daddr, (int)fs->lfs_bsize, NOCRED, &bp)) {
+               /*
+                * The inode does not contain anything useful, so it would
+                * be misleading to leave it on its hash chain. With mode
+                * still zero, it will be unlinked and returned to the free
+                * list by vput().
+                */
+               vput(vp);
+               brelse(bp);
+               *vpp = NULL;
+               return (error);
+       }
+       ip->i_din = *lfs_ifind(fs, ino, (struct dinode *)bp->b_data);
+       brelse(bp);
+
+       /*
+        * Initialize the vnode from the inode, check for aliases.  In all
+        * cases re-init ip, the underlying vnode/inode may have changed.
+        */
+       if (error = ufs_vinit(mp, lfs_specop_p, LFS_FIFOOPS, &vp)) {
+               vput(vp);
+               *vpp = NULL;
+               return (error);

        }
        }

+       /*
+        * Finish inode initialization now that aliasing has been resolved.
+        */
+       ip->i_devvp = ump->um_devvp;
+       VREF(ip->i_devvp);
+       *vpp = vp;

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

-sbupdate(mp)
-       struct mount *mp;
+/*
+ * File handle to vnode
+ *
+ * Have to be really careful about stale file handles:
+ * - check that the inode number is valid
+ * - call lfs_vget() to get the locked inode
+ * - check for an unallocated inode (i_mode == 0)
+ * - check that the given client host has export rights and return
+ *   those rights via. exflagsp and credanonp
+ *
+ * XXX
+ * use ifile to see if inode is allocated instead of reading off disk
+ * what is the relationship between my generational number and the NFS
+ * generational number.
+ */
+int
+lfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
+       register struct mount *mp;
+       struct fid *fhp;
+       struct mbuf *nam;
+       struct vnode **vpp;
+       int *exflagsp;
+       struct ucred **credanonp;

 {
 {

-       register struct fs *fs = mp->m_bufp->b_un.b_fs;
-       register struct buf *bp;
-       int blks;
-       caddr_t space;
-       int i, size;
-
-       bp = getblk(mp->m_dev, SBLOCK, (int)fs->fs_sbsize);
-       bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize);
-       bwrite(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);
-               bcopy(space, bp->b_un.b_addr, (u_int)size);
-               space += size;
-               bwrite(bp);
-       }
+       register struct ufid *ufhp;
+
+       ufhp = (struct ufid *)fhp;
+       if (ufhp->ufid_ino < ROOTINO)
+               return (ESTALE);
+       return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));

 }
 
 /*
 }
 
 /*

- * 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.
+ * Vnode pointer to File handle

  */
  */

-getmdev(pdev, fname)
-       caddr_t fname;
-       dev_t *pdev;
+/* ARGSUSED */
+lfs_vptofh(vp, fhp)
+       struct vnode *vp;
+       struct fid *fhp;

 {
 {

-       dev_t dev;

        register struct inode *ip;
        register struct inode *ip;

-       register struct nameidata *ndp = &u.u_nd;
-
-       if (!suser())
-               return (u.u_error);
-       ndp->ni_nameiop = LOOKUP | FOLLOW;
-       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 ((ip->i_mode&IFMT) != IFBLK) {
-               iput(ip);
-               return (ENOTBLK);
-       }
-       dev = (dev_t)ip->i_rdev;
-       iput(ip);
-       if (major(dev) >= nblkdev)
-               return (ENXIO);
-       *pdev = dev;
+       register struct ufid *ufhp;
+
+       ip = VTOI(vp);
+       ufhp = (struct ufid *)fhp;
+       ufhp->ufid_len = sizeof(struct ufid);
+       ufhp->ufid_ino = ip->i_number;
+       ufhp->ufid_gen = ip->i_gen;

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