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statfs.f_bsize => statfs.f_iosize; statfs.f_fsize => statfs.f_bsize (for SunOS)
[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 223d89a..7076647 100644 (file)
--- a/usr/src/sys/ufs/lfs/lfs_vfsops.c
+++ b/usr/src/sys/ufs/lfs/lfs_vfsops.c
@@ -1,380 +1,485 @@
 /*
 /*
- * 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 The Regents of the University of California.
+ * All rights reserved.
  *
  *
- *     @(#)lfs_vfsops.c        7.8 (Berkeley) %G%
+ * %sccs.include.redist.c%
+ *
+ *     @(#)lfs_vfsops.c        7.67 (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"
-#include "ioctl.h"
-#include "disklabel.h"
-#include "stat.h"
-#include "malloc.h"
+#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/specdev.h>
+#include <sys/mount.h>
+#include <sys/buf.h>
+#include <sys/file.h>
+#include <sys/disklabel.h>
+#include <sys/ioctl.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
 #include "ioctl.h"
 #include "disklabel.h"
 #include "stat.h"
 
 #include "ioctl.h"
 #include "disklabel.h"
 #include "stat.h"
 
-smount()
+#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>
+
+static 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_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;
+       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);
 
 
-       u.u_error = getmdev(&dev, uap->fspec);
-       if (u.u_error)
-               return;
+       /* Until LFS can do NFS right.          XXX */
+       if (args.exflags & MNT_EXPORTED)
+               return (EINVAL);
+       /*
+        * 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 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)
+                       return (0);
+       }
+       /*
+        * Not an update, or updating the name: look up the name
+        * and verify that it refers to a sensible block device.
+        */
        ndp->ni_nameiop = LOOKUP | FOLLOW;
        ndp->ni_segflg = UIO_USERSPACE;
        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;
+       ndp->ni_dirp = args.fspec;
+       if (error = namei(ndp, p))
+               return (error);
+       devvp = ndp->ni_vp;
+       if (devvp->v_type != VBLK) {
+               vrele(devvp);
+               return (ENOTBLK);
        }
        }
-       if ((ip->i_mode&IFMT) != IFDIR) {
-               iput(ip);
-               u.u_error = ENOTDIR;
-               return;
+       if (major(devvp->v_rdev) >= nblkdev) {
+               vrele(devvp);
+               return (ENXIO);
        }
        }
-       fs = mountfs(dev, uap->ronly, ip);
-       if (fs == 0) {
-               iput(ip);
-               return;
+       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);
        }
        }
-       (void) copyinstr(uap->freg, fs->fs_fsmnt, sizeof(fs->fs_fsmnt)-1, &len);
-       bzero(fs->fs_fsmnt + len, sizeof (fs->fs_fsmnt) - len);
+       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);
 }
 
 }
 
-struct fs *
-mountfs(dev, ronly, ip)
-       dev_t dev;
-       int ronly;
-       struct inode *ip;
+/*
+ * Common code for mount and mountroot
+ * LFS specific
+ */
+static int
+lfs_mountfs(devvp, mp, p)
+       register struct vnode *devvp;
+       struct mount *mp;
+       struct proc *p;
 {
 {
-       register struct mount *mp;
-       struct mount *fmp = NULL;
-       struct buf *tp = NULL;
-       register struct buf *bp = NULL;
-       register struct fs *fs;
+       extern struct vnode *rootvp;
+       register struct lfs *fs;
+       register struct ufsmount *ump;
+       struct inode *ip;
+       struct vnode *vp;
+       struct buf *bp;
        struct partinfo dpart;
        struct partinfo dpart;
-       int havepart = 0, blks;
-       caddr_t base, space;
-       int i, size;
-       register error;
-       int needclose = 0;
-
-       for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++) {
-               if (mp->m_fs == NULL) {
-                       if (fmp == NULL)
-                               fmp = mp;
-               } else if (dev == mp->m_dev) {
-                       u.u_error = EBUSY;              /* XXX */
-                       return ((struct fs *) NULL);
-               }
-       }
-       if ((mp = fmp) == NULL) {
-               u.u_error = EMFILE;             /* needs translation      XXX */
-               return ((struct fs *) NULL);
-       }
-       mp->m_fs = (struct fs *)1;      /* just to reserve this slot */
-       mp->m_dev = dev;
-       error =
-           (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE,
-               S_IFBLK);
-       if (error) {
-               u.u_error = error;
-               mp->m_fs = NULL;
-               return ((struct fs *) NULL);
-       }
-       needclose = 1;
-       if ((*bdevsw[major(dev)].d_ioctl)(dev, DIOCGPART,
-           (caddr_t)&dpart, FREAD) == 0) {
-               havepart = 1;
-               size = dpart.disklab->d_secsize;
-       } else
+       daddr_t seg_addr;
+       dev_t dev;
+       int error, i, ronly, size;
+
+       if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p))
+               return (error);
+
+       if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 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) {
-               havepart = 1;
+       else {
                size = dpart.disklab->d_secsize;
                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) {
-               mp->m_fs = NULL;
-               goto out;
+#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
        }
        }
-       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 */
+
+       /* 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;
+               error = EINVAL;         /* XXX needs translation */
                goto out;
        }
                goto out;
        }
-       mp->m_fs = (struct fs *)malloc(fs->fs_sbsize, M_SUPERBLK, M_WAITOK);
-       bcopy((caddr_t)tp->b_un.b_addr, (caddr_t)mp->m_fs,
-          (u_int)fs->fs_sbsize);
-       brelse(tp);
-       tp = NULL;
-       fs = mp->m_fs;
-       fs->fs_ronly = (ronly != 0);
-       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;
+#ifdef DEBUG
+       lfs_dump_super(fs);
 #endif
 #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(fs->fs_cssize, M_SUPERBLK, M_WAITOK);
-       if (space == NULL) {
-               error = ENOMEM;
+
+       /* Allocate the mount structure, copy the superblock into it. */
+       ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
+       ump->um_lfs = malloc(sizeof(struct lfs), M_SUPERBLK, M_WAITOK);
+       bcopy(bp->b_un.b_addr, ump->um_lfs, 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;
+       /* XXX NOTUSED: fs->lfs_seglist = NULL; */
+
+       /* Set the file system readonly/modify bits. */
+       fs = ump->um_lfs;
+       fs->lfs_ronly = ronly;
+       if (ronly == 0)
+               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;
+       for (i = 0; i < MAXQUOTAS; i++)
+               ump->um_quotas[i] = NULLVP;
+
+       /* Read the ifile disk inode and store it in a vnode. */
+       if (error = bread(devvp, fs->lfs_idaddr, fs->lfs_bsize, NOCRED, &bp))
                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;
-#ifdef 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) {
-                       free(base, M_SUPERBLK);
-                       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 = NULL;
-       }
-       mp->m_inodp = ip;
-       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 */
-       if (fs->fs_postblformat == FS_42POSTBLFMT)              /* XXX */
-               fs->fs_nrpos = 8;                               /* XXX */
+       if (error = lfs_vcreate(mp, LFS_IFILE_INUM, &vp))
+               goto out;
+       ip = VTOI(vp);
+       VREF(ip->i_devvp);
+
+       /* The ifile inode is stored in the superblock. */
+       fs->lfs_ivnode = vp;
+
+       /* Copy the on-disk inode into place. */
+       ip->i_din = *lfs_ifind(fs, LFS_IFILE_INUM, bp->b_un.b_dino);
+       brelse(bp);
+
+       /* Initialize the associated vnode */
+       vp->v_type = IFTOVT(ip->i_mode);
 
 
-       return (fs);
+       devvp->v_specflags |= SI_MOUNTEDON;
+       VREF(ip->i_devvp);
+
+       return (0);
 out:
 out:
-       if (needclose)
-               (void) closei(dev, IFBLK, ronly? FREAD : FREAD|FWRITE);
-       if (mp->m_fs) {
-               free((caddr_t)mp->m_fs, M_SUPERBLK);
-               mp->m_fs = NULL;
+       if (bp)
+               brelse(bp);
+       (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
+       if (ump) {
+               free(ump->um_lfs, M_SUPERBLK);
+               free(ump, M_UFSMNT);
+               mp->mnt_data = (qaddr_t)0;
        }
        }
-       if (tp)
-               brelse(tp);
-       u.u_error = error ? error : EIO;                        /* XXX */
-       return ((struct fs *) NULL);
+       return (error);
 }
 
 }
 
-umount()
+/*
+ * unmount system call
+ */
+lfs_unmount(mp, mntflags, p)
+       struct mount *mp;
+       int mntflags;
+       struct proc *p;
 {
 {
-       struct a {
-               char    *fspec;
-       } *uap = (struct a *)u.u_ap;
-
-       u.u_error = unmount1(uap->fspec, 0);
-}
+       extern int doforce;
+       register struct ufsmount *ump;
+       register struct lfs *fs;                                /* LFS */
+       int i, error, ronly, flags = 0;
+       int ndirty;                                             /* LFS */
 
 
-unmount1(fname, forcibly)
-       caddr_t fname;
-       int forcibly;
-{
-       dev_t dev;
-       register struct mount *mp;
-       int error;
-       register struct inode *ip;
-       register struct fs *fs;
+#ifdef VERBOSE
+       printf("lfs_unmount\n");
+#endif
+       if (mntflags & MNT_FORCE) {
+               if (!doforce || mp == rootfs)
+                       return (EINVAL);
+               flags |= FORCECLOSE;
+       }
+       if (error = lfs_segwrite(mp, 1))
+               return(error);
 
 
-       forcibly = 0;                                   /* XXX */
-       forcibly = 0;                                   /* XXX */
-       error = getmdev(&dev, fname);
-       if (error)
+ndirty = lfs_umountdebug(mp);
+printf("lfs_umountdebug: returned %d dirty\n", ndirty);
+return(0);
+       if (mntinvalbuf(mp))
+               return (EBUSY);
+       ump = VFSTOUFS(mp);
                return (error);
                return (error);
-       for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-               if (mp->m_fs != 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
 #ifdef QUOTA
-       if ((error = iflush(dev, mp->m_qinod)) && !forcibly)
-#else
-       if ((error = iflush(dev)) && !forcibly)
+       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(p, mp, i);
+               }
+               /*
+                * Here we fall through to vflush again to ensure
+                * that we have gotten rid of all the system vnodes.
+                */
+       }
 #endif
 #endif
+       if (error = vflush(mp, NULLVP, flags))
                return (error);
                return (error);
-#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);
+#ifdef NOTLFS                                                  /* LFS */
+       fs = ump->um_fs;
+       ronly = !fs->fs_ronly;
+#else
+       fs = ump->um_lfs;
+       ronly = !fs->lfs_ronly;
 #endif
 #endif
-       ip = mp->m_inodp;
-       ip->i_flag &= ~IMOUNT;
-       fs = mp->m_fs;
-       free((caddr_t)fs->fs_csp[0], M_SUPERBLK);
-       free((caddr_t)mp->m_fs, M_SUPERBLK);
-       mp->m_fs = NULL;
-       mp->m_dev = NODEV;
-       mpurge(mp - &mount[0]);
-       error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE);
-       irele(ip);
-       return (error);
+ * 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 = fs->lfs_dsize;
+       sbp->f_bfree = fs->lfs_bfree;
+       sbp->f_bavail = (fs->lfs_dsize * (100 - fs->lfs_minfree) / 100) -
+               (fs->lfs_dsize - sbp->f_bfree);
+       sbp->f_files = fs->lfs_nfiles;
+       sbp->f_ffree = fs->lfs_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);
+       }
+       return (0);
 }
 
 }
 
-sbupdate(mp)
+/*
+ * 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)
        struct mount *mp;
        struct mount *mp;
+       int waitfor;
 {
 {
-       register struct fs *fs = mp->m_fs;
-       register struct buf *bp;
-       int blks;
-       caddr_t space;
-       int i, size;
-
-#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);
-#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 */
-       bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0];
-       bp->b_un.b_fs->fs_sparecon[0] = 0;
+       extern int crashandburn, syncprt;
+       static int sync_lock, sync_want;
+       int error;
+
+#ifdef VERBOSE
+       printf("lfs_sync\n");
+#endif
+
+#ifdef DIAGNOSTIC
+       if (crashandburn)
+               return (0);
 #endif
 #endif
-#endif SECSIZE
-       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;
-#ifdef 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);
-#endif SECSIZE
-               bcopy(space, bp->b_un.b_addr, (u_int)size);
-               space += size;
-               bwrite(bp);
+       /*
+        * Meta data blocks are only marked dirty, not busy, so LFS syncs
+        * must be single threaded.
+        */
+       while (sync_lock) {
+               sync_want = 1;
+               if (error = tsleep(&sync_lock, PLOCK | PCATCH, "lfs sync", 0))
+                       return (error);
        }
        }
+       sync_lock = 1;
+
+       if (syncprt)
+               ufs_bufstats();
+
+       /* All syncs must be checkpoints until roll-forward is implemented. */
+       error = lfs_segwrite(mp, 1);            
+#ifdef QUOTA
+       qsync(mp);
+#endif
+       sync_lock = 0;
+       if (sync_want) {
+               sync_want = 0;
+               wakeup(&sync_lock);
+       }
+       return (error);
 }
 
 /*
 }
 
 /*
- * 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.
+ * 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 generation number matches
+ *
+ * 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.
  */
  */
-getmdev(pdev, fname)
-       caddr_t fname;
-       dev_t *pdev;
+int
+lfs_fhtovp(mp, fhp, vpp)
+       register struct mount *mp;
+       struct fid *fhp;
+       struct vnode **vpp;
 {
 {
-       dev_t dev;
        register struct inode *ip;
        register struct inode *ip;
-       register struct nameidata *ndp = &u.u_nd;
+       register struct ufid *ufhp;
+       struct vnode *nvp;
+       int error;
 
 
-       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);
+       ufhp = (struct ufid *)fhp;
+       if (ufhp->ufid_ino < ROOTINO)
+               return (EINVAL);
+       if (error = lfs_vget(mp, ufhp->ufid_ino, &nvp)) {
+               *vpp = NULLVP;
+               return (error);
        }
        }
-       if ((ip->i_mode&IFMT) != IFBLK) {
-               iput(ip);
-               return (ENOTBLK);
+       ip = VTOI(nvp);
+       if (ip->i_mode == 0) {
+               ufs_iput(ip);
+               *vpp = NULLVP;
+               return (EINVAL);
        }
        }
-       dev = (dev_t)ip->i_rdev;
-       iput(ip);
-       if (major(dev) >= nblkdev)
-               return (ENXIO);
-       *pdev = dev;
+       if (ip->i_gen != ufhp->ufid_gen) {
+               ufs_iput(ip);
+               *vpp = NULLVP;
+               return (EINVAL);
+       }
+       *vpp = nvp;
+       return (0);
+}
+
+/*
+ * Vnode pointer to File handle
+ */
+/* ARGSUSED */
+lfs_vptofh(vp, fhp)
+       struct vnode *vp;
+       struct fid *fhp;
+{
+       register struct inode *ip;
+       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);
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.