/*
- * 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%
+ * %sccs.include.redist.c%
+ *
+ * @(#)lfs_vfsops.c 7.49 (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 "kernel.h"
+#include "vnode.h"
+#include "specdev.h"
#include "mount.h"
+#include "buf.h"
#include "file.h"
-#include "conf.h"
-#include "ioctl.h"
#include "disklabel.h"
-#include "stat.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"
-smount()
+/*
+ * 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 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->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 ((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);
+ }
+ rootfs = mp;
+ mp->mnt_next = mp;
+ mp->mnt_prev = mp;
+ mp->mnt_vnodecovered = NULLVP;
+ ump = VFSTOUFS(mp);
+ fs = ump->um_fs;
+ bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
+ fs->fs_fsmnt[0] = '/';
+ bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+ MNAMELEN);
+ (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
+ &size);
+ bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+ (void) ufs_statfs(mp, &mp->mnt_stat);
+ vfs_unlock(mp);
+ inittodr(fs->fs_time);
+ return (0);
+}
+
+/*
+ * VFS Operations.
+ *
+ * mount system call
+ */
+ufs_mount(mp, path, data, ndp)
+ register struct mount *mp;
+ char *path;
+ caddr_t data;
+ struct nameidata *ndp;
+{
+ struct vnode *devvp;
+ struct ufs_args args;
+ struct ufsmount *ump;
+ register struct fs *fs;
+ u_int size;
+ int error;
+
+ if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
+ return (error);
+ /*
+ * Process export requests.
+ */
+ if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
+ if (args.exflags & MNT_EXPORTED)
+ mp->mnt_flag |= MNT_EXPORTED;
+ else
+ mp->mnt_flag &= ~MNT_EXPORTED;
+ if (args.exflags & MNT_EXRDONLY)
+ mp->mnt_flag |= MNT_EXRDONLY;
+ else
+ mp->mnt_flag &= ~MNT_EXRDONLY;
+ mp->mnt_exroot = args.exroot;
+ }
+ if ((mp->mnt_flag & MNT_UPDATE) == 0) {
+ if ((error = getmdev(&devvp, args.fspec, ndp)) != 0)
+ return (error);
+ error = mountfs(devvp, mp);
+ } else {
+ ump = VFSTOUFS(mp);
+ fs = ump->um_fs;
+ if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
+ fs->fs_ronly = 0;
+ /*
+ * Verify that the specified device is the one that
+ * is really being used for the root file system.
+ */
+ if (args.fspec == 0)
+ return (0);
+ if ((error = getmdev(&devvp, args.fspec, ndp)) != 0)
+ return (error);
+ if (devvp != ump->um_devvp)
+ error = EINVAL; /* needs translation */
+ else
+ vrele(devvp);
}
- 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 (error) {
+ vrele(devvp);
+ return (error);
+ }
+ ump = VFSTOUFS(mp);
+ fs = ump->um_fs;
+ (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
+ bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
+ bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+ MNAMELEN);
+ (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
+ &size);
+ bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+ (void) ufs_statfs(mp, &mp->mnt_stat);
+ return (0);
}
-/* this routine has races if running twice */
-struct fs *
-mountfs(dev, ronly, ip)
- dev_t dev;
- int ronly;
- struct inode *ip;
+/*
+ * Common code for mount and mountroot
+ */
+mountfs(devvp, mp)
+ register struct vnode *devvp;
+ struct mount *mp;
{
- register struct mount *mp = 0;
- struct buf *tp = 0;
- register struct buf *bp = 0;
+ register struct ufsmount *ump = (struct ufsmount *)0;
+ struct buf *bp = NULL;
register struct fs *fs;
+ dev_t dev = devvp->v_rdev;
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 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
- error =
- (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE,
- S_IFBLK);
- if (error)
- goto out;
+ if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED))
+ return (error);
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;
-#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;
-#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))
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;
}
- 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);
- 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;
- fs->fs_dbsize = size;
+ dpart.part->p_cpg = fs->fs_cpg;
}
#ifdef SECSIZE
/*
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)
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;
}
- 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;
- 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->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 (fs);
+ return (0);
out:
- if (error == 0)
- error = EIO;
- if (needclose)
- (void) closei((dev_t)ip->i_rdev, IFBLK,
- ronly? FREAD : FREAD|FWRITE);
- if (needclose)
- (void) closei((dev_t)ip->i_rdev, IFBLK,
- ronly? FREAD : FREAD|FWRITE);
- if (ip)
- iput(ip);
- if (mp)
- mp->m_bufp = 0;
if (bp)
brelse(bp);
- if (tp)
- brelse(tp);
- u.u_error = error;
- return (0);
+ 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);
}
-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, mntflags)
+ struct mount *mp;
+ int mntflags;
{
- dev_t dev;
- register struct mount *mp;
- int error;
- register struct inode *ip;
+ register struct ufsmount *ump;
register struct fs *fs;
+ int i, error, ronly, flags = 0;
- forcibly = 0; /* XXX */
- forcibly = 0; /* XXX */
- error = getmdev(&dev, fname);
- if (error)
+ 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);
- 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)
+ 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);
-#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);
-#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;
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);
+}
+
+/*
+ * Do operations associated with quotas
+ */
+ufs_quotactl(mp, cmds, uid, arg)
+ struct mount *mp;
+ int cmds;
+ uid_t uid;
+ caddr_t arg;
+{
+ register struct nameidata *ndp = &u.u_nd;
+ struct ufsmount *ump = VFSTOUFS(mp);
+ struct proc *p = u.u_procp; /* XXX */
+ int cmd, type, error;
+
+#ifndef QUOTA
+ return (EOPNOTSUPP);
+#else
+ if (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
+}
+
+/*
+ * 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);
+}
+
+int syncprt = 0;
+
+/*
+ * Go through the disk queues to initiate sandbagged IO;
+ * go through the inodes to write those that have been modified;
+ * initiate the writing of the super block if it has been modified.
+ *
+ * Note: we are always called with the filesystem marked `MPBUSY'.
+ */
+ufs_sync(mp, waitfor)
struct mount *mp;
+ int waitfor;
{
- register struct 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;
- 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
- 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);
+ /* 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_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) {
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;
- 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");
}
}
/*
- * Common code for mount and umount.
+ * 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);
+}
+
+/*
* 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;
- 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;
- 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);
+ if (error = namei(ndp))
+ return (error);
+ vp = ndp->ni_vp;
+ if (vp->v_type != VBLK) {
+ vrele(vp);
return (ENOTBLK);
}
- dev = (dev_t)ip->i_rdev;
- iput(ip);
- if (major(dev) >= nblkdev)
+ if (major(vp->v_rdev) >= nblkdev) {
+ vrele(vp);
return (ENXIO);
- *pdev = dev;
+ }
+ *devvpp = vp;
return (0);
}