/*
- * 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 7.5 (Berkeley) %G%
+ * %sccs.include.redist.c%
+ *
+ * @(#)lfs_vfsops.c 7.88 (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 <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"
-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>
+
+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.exflags & 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.
+ */
+ if (args.exflags & MNT_EXPORTED) {
+ if (error = ufs_hang_addrlist(mp, &args))
+ return (error);
+ mp->mnt_flag |= MNT_EXPORTED;
+ }
+ if (args.exflags & MNT_DELEXPORT) {
+ ufs_free_addrlist(ump);
+ mp->mnt_flag &=
+ ~(MNT_EXPORTED | MNT_DEFEXPORTED);
+ }
+ return (0);
+ }
+ }
+ /*
+ * 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);
+ }
+ 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 ((ip->i_mode&IFMT) != IFDIR) {
- iput(ip);
- u.u_error = ENOTDIR;
- return;
+ if (error) {
+ vrele(devvp);
+ 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);
+ 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;
+ extern struct vnode *rootvp;
+ register struct lfs *fs;
+ register struct ufsmount *ump;
+ struct vnode *vp;
+ struct buf *bp;
struct partinfo dpart;
- int havepart = 0, blks;
- caddr_t space;
- int i, size;
- register error;
- int needclose = 0;
-
- error =
- (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE,
- S_IFBLK);
- if (error)
- goto out;
- needclose = 1;
- if ((*bdevsw[major(dev)].d_ioctl)(dev, DIOCGPART,
- (caddr_t)&dpart, FREAD) == 0) {
- havepart = 1;
- size = dpart.disklab->d_secsize;
- } else
+ 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;
-#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;
-#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)
+#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;
- 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 */
+ 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,
- (u_int)fs->fs_sbsize);
- brelse(tp);
- tp = 0;
- fs = bp->b_un.b_fs;
- fs->fs_ronly = (ronly != 0);
+#ifdef DEBUG
+ lfs_dump_super(fs);
+#endif
+
+ /* 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_un.b_addr, 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)
- 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;
- fs->fs_dbsize = size;
- }
-#ifdef SECSIZE
+ 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;
+
/*
- * If we have a disk label, force per-partition
- * filesystem information to be correct
- * and set correct current fsbtodb shift.
+ * 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.
*/
-#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);
- space = wmemall(vmemall, (int)fs->fs_cssize);
- if (space == 0) {
- error = ENOMEM;
+ if (error = VFS_VGET(mp, LFS_IFILE_INUM, &vp))
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) {
- 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 */
+ fs->lfs_ivnode = vp;
+ VREF(vp);
+ vput(vp);
- return (fs);
+ return (0);
out:
- if (error == 0)
- error = EIO;
- if (needclose && ip)
- (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;
+ (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 == 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.le_next)
+ 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);
+ }
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;
+ extern int syncprt;
+ int error;
- u.u_error = unmount1(uap->fspec, 0);
+ /* All syncs must be checkpoints until roll-forward is implemented. */
+ error = lfs_segwrite(mp, 1);
+#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;
{
+ register struct lfs *fs;
+ register struct inode *ip;
+ struct buf *bp;
+ struct ifile *ifp;
+ struct vnode *vp;
+ struct ufsmount *ump;
+ daddr_t daddr;
dev_t dev;
- register struct mount *mp;
int error;
- register struct inode *ip;
- register struct fs *fs;
- forcibly = 0; /* XXX */
- forcibly = 0; /* XXX */
- error = getmdev(&dev, fname);
- if (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);
+ }
+
+ /* Allocate new vnode/inode. */
+ if (error = lfs_vcreate(mp, ino, &vp)) {
+ *vpp = NULL;
return (error);
- for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
- if (mp->m_bufp != NULL && dev == mp->m_dev)
- goto found;
- return (EINVAL);
-found:
- xumount(dev); /* remove unused sticky files from text table */
- nchinval(dev); /* flush the name cache */
- update();
-#ifdef QUOTA
- if ((error = iflush(dev, mp->m_qinod)) && !forcibly)
-#else
- if ((error = iflush(dev)) && !forcibly)
-#endif
+ }
+
+ /*
+ * 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.
+ */
+ 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.
+ * Iput() will return it to the free list.
+ */
+ ufs_ihashrem(ip);
+
+ /* Unlock and discard unneeded inode. */
+ vput(vp);
+ brelse(bp);
+ *vpp = NULL;
return (error);
-#ifdef QUOTA
- closedq(mp);
+ }
+ ip->i_din = *lfs_ifind(fs, ino, bp->b_un.b_dino);
+ brelse(bp);
+
/*
- * 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.
+ * Initialize the vnode from the inode, check for aliases. In all
+ * cases re-init ip, the underlying vnode/inode may have changed.
*/
- (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]);
- error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE);
- irele(ip);
- return (error);
+ 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);
}
-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;
-
-#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);
-#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
- 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);
- }
+ 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 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);
}