new copyright notice

[unix-history] / 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 580719c..6ab1f3a 100644 (file)
--- a/usr/src/sys/ufs/ffs/ffs_vfsops.c
+++ b/usr/src/sys/ufs/ffs/ffs_vfsops.c
@@ -1,266 +1,752 @@
-/*     ffs_vfsops.c    6.7     84/07/18        */
-
-#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/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 = (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 char *cp;
-       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 | NOCACHE | 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 || (ip->i_mode&IFMT) != IFDIR) {
-               iput(ip);
-               u.u_error = EBUSY;
-               return;
+       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);

        }
        }

-       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->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);

 }
 
 }
 

-/* 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)
+       register struct mount *mp;
+       char *path;
+       caddr_t data;
+       struct nameidata *ndp;

 {
 {

-       register struct mount *mp = 0;
-       struct buf *tp = 0;
-       register struct buf *bp = 0;
+       struct vnode *devvp;
+       struct ufs_args args;
+       struct ufsmount *ump;

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

-       int blks;
-       caddr_t space;
-       int i, size;
-       register error;
+       u_int size;
+       int error;

 
 

-       error =
-           (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE);
-       if (error)
-               goto out;
-       tp = bread(dev, SBLOCK, SBSIZE);
-       if (tp->b_flags & B_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);
+}
+
+/*
+ * Common code for mount and mountroot
+ */
+mountfs(devvp, mp)
+       register struct vnode *devvp;
+       struct mount *mp;
+{
+       register struct ufsmount *ump = (struct ufsmount *)0;
+       struct buf *bp = NULL;
+       register struct fs *fs;
+       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;
+
+       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;
+       }
+       if (error = bread(devvp, SBLOCK, SBSIZE, 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;
-                       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;
+               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,
+       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);
           (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 (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;
-               goto out;
+       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);
+       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;
        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;
                }
                        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;
                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:
 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);
-       u.u_error = error;
+       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);
 }
 
        return (0);
 }
 

-umount()
+/*
+ * unmount system call
+ */
+ufs_unmount(mp, mntflags)
+       struct mount *mp;
+       int mntflags;

 {
 {

-       struct a {
-               char    *fspec;
-       } *uap = (struct a *)u.u_ap;
+       register struct ufsmount *ump;
+       register struct fs *fs;
+       int i, error, ronly, flags = 0;

 
 

-       u.u_error = unmount1(uap->fspec, 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(fname, forcibly)
-       caddr_t fname;
-       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 inode *ip;

-       register struct fs *fs;
+       struct inode *nip;
+       struct vnode tvp;
+       int error;

 
 

-       error = getmdev(&dev, fname);
+       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);
        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 ((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
 #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
 #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);
 }
 
        }
        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;
        struct mount *mp;

+       int waitfor;

 {
 {

-       register struct fs *fs = mp->m_bufp->b_un.b_fs;
+       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->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;

 
 

-       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);
        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;
        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;
                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.
  */
  * 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_segflg = UIO_USERSPACE;
        ndp->ni_dirp = fname;
        ndp->ni_nameiop = LOOKUP | FOLLOW;
        ndp->ni_segflg = UIO_USERSPACE;
        ndp->ni_dirp = fname;

-       ip = namei(ndp);
-       if (ip == NULL)
-               return (u.u_error);
-       if ((ip->i_mode&IFMT) != IFBLK) {
-               iput(ip);
+       if (error = namei(ndp))
+               return (error);
+       vp = ndp->ni_vp;
+       if (vp->v_type != VBLK) {
+               vrele(vp);

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

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

                return (ENXIO);
                return (ENXIO);

-       *pdev = dev;
+       }
+       *devvpp = vp;

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