b5ee7ec63a
This allows ffs_fsync() to break out of a loop that might otherwise be infinite on kernels compiled without the SOFTUPDATES option. The observed symptom was a system hang at the first unmount attempt.
270 lines
5.5 KiB
C
270 lines
5.5 KiB
C
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/*
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* Copyright 1998 Marshall Kirk McKusick. All Rights Reserved.
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*
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* The soft updates code is derived from the appendix of a University
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* of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
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* "Soft Updates: A Solution to the Metadata Update Problem in File
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* Systems", CSE-TR-254-95, August 1995).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. None of the names of McKusick, Ganger, or the University of Michigan
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)ffs_softdep_stub.c 9.1 (McKusick) 7/10/97
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* $FreeBSD$
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*/
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/*
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* Use this file as ffs_softdep.c if you do not wish the real ffs_softdep.c
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* to be included in your system. (e.g for legal reasons )
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* The real files are in /usr/src/contrib/sys/softupdates.
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* You must copy them here before you can use soft updates.
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* Read the README for legal and technical information.
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*/
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#include "opt_ffs.h"
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#if (SOFTUPDATES == 0 ) /* SOFTUPDATES not configured in, use these stubs. */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <ufs/ufs/ufs_extern.h>
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int
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softdep_flushfiles(oldmnt, flags, p)
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struct mount *oldmnt;
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int flags;
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struct proc *p;
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{
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panic("softdep_flushfiles called");
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}
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int
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softdep_mount(devvp, mp, fs, cred)
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struct vnode *devvp;
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struct mount *mp;
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struct fs *fs;
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struct ucred *cred;
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{
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return (0);
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}
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void
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softdep_initialize()
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{
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return;
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}
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void
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softdep_setup_inomapdep(bp, ip, newinum)
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struct buf *bp;
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struct inode *ip;
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ino_t newinum;
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{
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panic("softdep_setup_inomapdep called");
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}
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void
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softdep_setup_blkmapdep(bp, fs, newblkno)
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struct buf *bp;
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struct fs *fs;
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ufs_daddr_t newblkno;
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{
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panic("softdep_setup_blkmapdep called");
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}
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void
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softdep_setup_allocdirect(ip, lbn, newblkno, oldblkno, newsize, oldsize, bp)
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struct inode *ip;
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ufs_lbn_t lbn;
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ufs_daddr_t newblkno;
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ufs_daddr_t oldblkno;
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long newsize;
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long oldsize;
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struct buf *bp;
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{
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panic("softdep_setup_allocdirect called");
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}
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void
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softdep_setup_allocindir_page(ip, lbn, bp, ptrno, newblkno, oldblkno, nbp)
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struct inode *ip;
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ufs_lbn_t lbn;
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struct buf *bp;
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int ptrno;
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ufs_daddr_t newblkno;
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ufs_daddr_t oldblkno;
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struct buf *nbp;
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{
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panic("softdep_setup_allocindir_page called");
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}
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void
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softdep_setup_allocindir_meta(nbp, ip, bp, ptrno, newblkno)
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struct buf *nbp;
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struct inode *ip;
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struct buf *bp;
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int ptrno;
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ufs_daddr_t newblkno;
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{
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panic("softdep_setup_allocindir_meta called");
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}
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void
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softdep_setup_freeblocks(ip, length)
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struct inode *ip;
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off_t length;
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{
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panic("softdep_setup_freeblocks called");
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}
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void
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softdep_freefile(pvp, ino, mode)
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struct vnode *pvp;
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ino_t ino;
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int mode;
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{
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panic("softdep_freefile called");
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}
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void
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softdep_setup_directory_add(bp, dp, diroffset, newinum, newdirbp)
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struct buf *bp;
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struct inode *dp;
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off_t diroffset;
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long newinum;
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struct buf *newdirbp;
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{
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panic("softdep_setup_directory_add called");
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}
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void
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softdep_change_directoryentry_offset(dp, base, oldloc, newloc, entrysize)
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struct inode *dp;
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caddr_t base;
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caddr_t oldloc;
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caddr_t newloc;
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int entrysize;
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{
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panic("softdep_change_directoryentry_offset called");
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}
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void
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softdep_setup_remove(bp, dp, ip, isrmdir)
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struct buf *bp;
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struct inode *dp;
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struct inode *ip;
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int isrmdir;
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{
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panic("softdep_setup_remove called");
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}
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void
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softdep_setup_directory_change(bp, dp, ip, newinum, isrmdir)
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struct buf *bp;
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struct inode *dp;
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struct inode *ip;
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long newinum;
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int isrmdir;
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{
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panic("softdep_setup_directory_change called");
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}
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void
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softdep_change_linkcnt(ip)
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struct inode *ip;
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{
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panic("softdep_change_linkcnt called");
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}
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void
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softdep_load_inodeblock(ip)
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struct inode *ip;
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{
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panic("softdep_load_inodeblock called");
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}
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void
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softdep_update_inodeblock(ip, bp, waitfor)
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struct inode *ip;
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struct buf *bp;
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int waitfor;
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{
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panic("softdep_update_inodeblock called");
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}
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void
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softdep_fsync_mountdev(vp)
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struct vnode *vp;
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{
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return;
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}
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int
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softdep_flushworklist(oldmnt, countp, p)
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struct mount *oldmnt;
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int *countp;
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struct proc *p;
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{
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*countp = 0;
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return (0);
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}
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int
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softdep_sync_metadata(ap)
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struct vop_fsync_args /* {
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struct vnode *a_vp;
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struct ucred *a_cred;
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int a_waitfor;
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struct proc *a_p;
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} */ *ap;
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{
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return (0);
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}
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#endif /* SOFTUPDATES not configured in */
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