- Fix for possible unset uid/gid in toproto - Fix for default mtree style - Update libelf - Importing libexecinfo - Resynchronize GCC, mpc, gmp, mpfr - build.sh: Replace params with show-params. This has been done as the make target has been renamed in the same way, while a new target named params has been added. This new target generates a file containing all the parameters, instead of printing it on the console. - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org) get getservbyport() out of the inner loop Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
703 lines
20 KiB
C
703 lines
20 KiB
C
/* $NetBSD: lfs_rfw.c,v 1.18 2013/07/28 01:05:52 dholland Exp $ */
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/*-
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* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Konrad E. Schroder <perseant@hhhh.org>.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lfs_rfw.c,v 1.18 2013/07/28 01:05:52 dholland Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_quota.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/kthread.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <sys/mbuf.h>
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#include <sys/file.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/pool.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <uvm/uvm_extern.h>
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#include <sys/sysctl.h>
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#include <sys/conf.h>
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#include <sys/kauth.h>
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#include <miscfs/specfs/specdev.h>
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#include <ufs/lfs/ulfs_quotacommon.h>
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#include <ufs/lfs/ulfs_inode.h>
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#include <ufs/lfs/ulfsmount.h>
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#include <ufs/lfs/ulfs_extern.h>
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#include <uvm/uvm.h>
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#include <uvm/uvm_stat.h>
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#include <uvm/uvm_pager.h>
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#include <uvm/uvm_pdaemon.h>
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#include <ufs/lfs/lfs.h>
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#include <ufs/lfs/lfs_kernel.h>
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#include <ufs/lfs/lfs_extern.h>
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#include <miscfs/genfs/genfs.h>
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#include <miscfs/genfs/genfs_node.h>
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/*
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* Roll-forward code.
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*/
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static daddr_t check_segsum(struct lfs *, daddr_t, u_int64_t,
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kauth_cred_t, int, int *, struct lwp *);
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extern int lfs_do_rfw;
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/*
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* Allocate a particular inode with a particular version number, freeing
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* any previous versions of this inode that may have gone before.
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* Used by the roll-forward code.
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*
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* XXX this function does not have appropriate locking to be used on a live fs;
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* XXX but something similar could probably be used for an "undelete" call.
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*
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* Called with the Ifile inode locked.
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*/
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int
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lfs_rf_valloc(struct lfs *fs, ino_t ino, int vers, struct lwp *l,
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struct vnode **vpp)
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{
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IFILE *ifp;
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struct buf *bp, *cbp;
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struct vnode *vp;
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struct inode *ip;
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ino_t tino, oldnext;
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int error;
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CLEANERINFO *cip;
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ASSERT_SEGLOCK(fs); /* XXX it doesn't, really */
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/*
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* First, just try a vget. If the version number is the one we want,
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* we don't have to do anything else. If the version number is wrong,
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* take appropriate action.
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*/
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error = VFS_VGET(fs->lfs_ivnode->v_mount, ino, &vp);
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if (error == 0) {
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DLOG((DLOG_RF, "lfs_rf_valloc[1]: ino %d vp %p\n", ino, vp));
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*vpp = vp;
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ip = VTOI(vp);
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if (ip->i_gen == vers)
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return 0;
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else if (ip->i_gen < vers) {
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lfs_truncate(vp, (off_t)0, 0, NOCRED);
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ip->i_gen = ip->i_ffs1_gen = vers;
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LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
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return 0;
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} else {
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DLOG((DLOG_RF, "ino %d: sought version %d, got %d\n",
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ino, vers, ip->i_ffs1_gen));
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vput(vp);
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*vpp = NULLVP;
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return EEXIST;
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}
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}
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/*
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* The inode is not in use. Find it on the free list.
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*/
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/* If the Ifile is too short to contain this inum, extend it */
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while (VTOI(fs->lfs_ivnode)->i_size <= (ino /
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fs->lfs_ifpb + fs->lfs_cleansz + fs->lfs_segtabsz)
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<< fs->lfs_bshift) {
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lfs_extend_ifile(fs, NOCRED);
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}
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LFS_IENTRY(ifp, fs, ino, bp);
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oldnext = ifp->if_nextfree;
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ifp->if_version = vers;
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brelse(bp, 0);
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LFS_GET_HEADFREE(fs, cip, cbp, &ino);
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if (ino) {
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LFS_PUT_HEADFREE(fs, cip, cbp, oldnext);
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} else {
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tino = ino;
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while (1) {
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LFS_IENTRY(ifp, fs, tino, bp);
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if (ifp->if_nextfree == ino ||
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ifp->if_nextfree == LFS_UNUSED_INUM)
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break;
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tino = ifp->if_nextfree;
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brelse(bp, 0);
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}
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if (ifp->if_nextfree == LFS_UNUSED_INUM) {
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brelse(bp, 0);
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return ENOENT;
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}
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ifp->if_nextfree = oldnext;
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LFS_BWRITE_LOG(bp);
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}
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error = lfs_ialloc(fs, fs->lfs_ivnode, ino, vers, &vp);
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if (error == 0) {
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/*
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* Make it VREG so we can put blocks on it. We will change
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* this later if it turns out to be some other kind of file.
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*/
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ip = VTOI(vp);
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ip->i_mode = ip->i_ffs1_mode = LFS_IFREG;
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ip->i_nlink = ip->i_ffs1_nlink = 1;
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ulfs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, &vp);
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ip = VTOI(vp);
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DLOG((DLOG_RF, "lfs_rf_valloc: ino %d vp %p\n", ino, vp));
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/* The dirop-nature of this vnode is past */
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lfs_unmark_vnode(vp);
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(void)lfs_vunref(vp);
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vp->v_uflag &= ~VU_DIROP;
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mutex_enter(&lfs_lock);
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--lfs_dirvcount;
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--fs->lfs_dirvcount;
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TAILQ_REMOVE(&fs->lfs_dchainhd, ip, i_lfs_dchain);
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wakeup(&lfs_dirvcount);
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wakeup(&fs->lfs_dirvcount);
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mutex_exit(&lfs_lock);
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}
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*vpp = vp;
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return error;
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}
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/*
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* Load the appropriate indirect block, and change the appropriate pointer.
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* Mark the block dirty. Do segment and avail accounting.
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*/
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static int
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update_meta(struct lfs *fs, ino_t ino, int vers, daddr_t lbn,
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daddr_t ndaddr, size_t size, struct lwp *l)
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{
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int error;
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struct vnode *vp;
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struct inode *ip;
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#ifdef DEBUG
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daddr_t odaddr;
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struct indir a[ULFS_NIADDR];
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int num;
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int i;
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#endif /* DEBUG */
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struct buf *bp;
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SEGUSE *sup;
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KASSERT(lbn >= 0); /* no indirect blocks */
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if ((error = lfs_rf_valloc(fs, ino, vers, l, &vp)) != 0) {
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DLOG((DLOG_RF, "update_meta: ino %d: lfs_rf_valloc"
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" returned %d\n", ino, error));
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return error;
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}
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if ((error = lfs_balloc(vp, (lbn << fs->lfs_bshift), size,
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NOCRED, 0, &bp)) != 0) {
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vput(vp);
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return (error);
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}
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/* No need to write, the block is already on disk */
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if (bp->b_oflags & BO_DELWRI) {
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LFS_UNLOCK_BUF(bp);
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fs->lfs_avail += lfs_btofsb(fs, bp->b_bcount);
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}
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brelse(bp, BC_INVAL);
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/*
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* Extend the file, if it is not large enough already.
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* XXX this is not exactly right, we don't know how much of the
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* XXX last block is actually used. We hope that an inode will
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* XXX appear later to give the correct size.
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*/
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ip = VTOI(vp);
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if (ip->i_size <= (lbn << fs->lfs_bshift)) {
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u_int64_t newsize;
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if (lbn < ULFS_NDADDR)
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newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) +
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(size - fs->lfs_fsize) + 1;
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else
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newsize = ip->i_ffs1_size = (lbn << fs->lfs_bshift) + 1;
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if (ip->i_size < newsize) {
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ip->i_size = newsize;
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/*
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* tell vm our new size for the case the inode won't
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* appear later.
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*/
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uvm_vnp_setsize(vp, newsize);
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}
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}
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lfs_update_single(fs, NULL, vp, lbn, ndaddr, size);
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LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, ndaddr), bp);
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sup->su_nbytes += size;
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LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, ndaddr), bp);
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/* differences here should be due to UNWRITTEN indirect blocks. */
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KASSERT((lfs_lblkno(fs, ip->i_size) > ULFS_NDADDR &&
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ip->i_lfs_effnblks == ip->i_ffs1_blocks) ||
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ip->i_lfs_effnblks >= ip->i_ffs1_blocks);
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#ifdef DEBUG
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/* Now look again to make sure it worked */
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ulfs_bmaparray(vp, lbn, &odaddr, &a[0], &num, NULL, NULL);
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for (i = num; i > 0; i--) {
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if (!a[i].in_exists)
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panic("update_meta: absent %d lv indirect block", i);
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}
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if (LFS_DBTOFSB(fs, odaddr) != ndaddr)
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DLOG((DLOG_RF, "update_meta: failed setting ino %d lbn %"
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PRId64 " to %" PRId64 "\n", ino, lbn, ndaddr));
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#endif /* DEBUG */
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vput(vp);
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return 0;
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}
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static int
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update_inoblk(struct lfs *fs, daddr_t offset, kauth_cred_t cred,
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struct lwp *l)
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{
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struct vnode *devvp, *vp;
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struct inode *ip;
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struct ulfs1_dinode *dip;
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struct buf *dbp, *ibp;
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int error;
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daddr_t daddr;
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IFILE *ifp;
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SEGUSE *sup;
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devvp = VTOI(fs->lfs_ivnode)->i_devvp;
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/*
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* Get the inode, update times and perms.
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* DO NOT update disk blocks, we do that separately.
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*/
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error = bread(devvp, LFS_FSBTODB(fs, offset), fs->lfs_ibsize,
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cred, 0, &dbp);
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if (error) {
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DLOG((DLOG_RF, "update_inoblk: bread returned %d\n", error));
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return error;
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}
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dip = ((struct ulfs1_dinode *)(dbp->b_data)) + LFS_INOPB(fs);
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while (--dip >= (struct ulfs1_dinode *)dbp->b_data) {
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if (dip->di_inumber > LFS_IFILE_INUM) {
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error = lfs_rf_valloc(fs, dip->di_inumber, dip->di_gen,
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l, &vp);
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if (error) {
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DLOG((DLOG_RF, "update_inoblk: lfs_rf_valloc"
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" returned %d\n", error));
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continue;
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}
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ip = VTOI(vp);
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if (dip->di_size != ip->i_size)
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lfs_truncate(vp, dip->di_size, 0, NOCRED);
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/* Get mode, link count, size, and times */
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memcpy(ip->i_din.ffs1_din, dip,
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offsetof(struct ulfs1_dinode, di_db[0]));
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/* Then the rest, except di_blocks */
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ip->i_flags = ip->i_ffs1_flags = dip->di_flags;
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ip->i_gen = ip->i_ffs1_gen = dip->di_gen;
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ip->i_uid = ip->i_ffs1_uid = dip->di_uid;
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ip->i_gid = ip->i_ffs1_gid = dip->di_gid;
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ip->i_mode = ip->i_ffs1_mode;
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ip->i_nlink = ip->i_ffs1_nlink;
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ip->i_size = ip->i_ffs1_size;
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LFS_SET_UINO(ip, IN_CHANGE | IN_UPDATE);
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/* Re-initialize to get type right */
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ulfs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p,
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&vp);
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vput(vp);
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/* Record change in location */
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LFS_IENTRY(ifp, fs, dip->di_inumber, ibp);
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daddr = ifp->if_daddr;
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ifp->if_daddr = LFS_DBTOFSB(fs, dbp->b_blkno);
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error = LFS_BWRITE_LOG(ibp); /* Ifile */
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/* And do segment accounting */
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if (lfs_dtosn(fs, daddr) != lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno))) {
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if (daddr > 0) {
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LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, daddr),
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ibp);
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sup->su_nbytes -= sizeof (struct ulfs1_dinode);
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LFS_WRITESEGENTRY(sup, fs,
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lfs_dtosn(fs, daddr),
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ibp);
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}
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LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno)),
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ibp);
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sup->su_nbytes += sizeof (struct ulfs1_dinode);
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LFS_WRITESEGENTRY(sup, fs,
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lfs_dtosn(fs, LFS_DBTOFSB(fs, dbp->b_blkno)),
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ibp);
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}
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}
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}
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brelse(dbp, BC_AGE);
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return 0;
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}
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#define CHECK_CKSUM 0x0001 /* Check the checksum to make sure it's valid */
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#define CHECK_UPDATE 0x0002 /* Update Ifile for new data blocks / inodes */
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static daddr_t
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check_segsum(struct lfs *fs, daddr_t offset, u_int64_t nextserial,
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kauth_cred_t cred, int flags, int *pseg_flags, struct lwp *l)
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{
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struct vnode *devvp;
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struct buf *bp, *dbp;
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int error, nblocks = 0, ninos, i, j; /* XXX: gcc */
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SEGSUM *ssp;
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u_long *dp = NULL, *datap = NULL; /* XXX u_int32_t */
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daddr_t oldoffset;
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int32_t *iaddr; /* XXX ondisk32 */
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FINFO *fip;
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SEGUSE *sup;
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size_t size;
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devvp = VTOI(fs->lfs_ivnode)->i_devvp;
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/*
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* If the segment has a superblock and we're at the top
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* of the segment, skip the superblock.
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*/
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if (lfs_sntod(fs, lfs_dtosn(fs, offset)) == offset) {
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LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
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if (sup->su_flags & SEGUSE_SUPERBLOCK)
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offset += lfs_btofsb(fs, LFS_SBPAD);
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brelse(bp, 0);
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}
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/* Read in the segment summary */
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error = bread(devvp, LFS_FSBTODB(fs, offset), fs->lfs_sumsize,
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cred, 0, &bp);
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if (error)
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return -1;
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/* Check summary checksum */
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ssp = (SEGSUM *)bp->b_data;
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if (flags & CHECK_CKSUM) {
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if (ssp->ss_sumsum != cksum(&ssp->ss_datasum,
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fs->lfs_sumsize -
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sizeof(ssp->ss_sumsum))) {
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DLOG((DLOG_RF, "Sumsum error at 0x%" PRIx64 "\n", offset));
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offset = -1;
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goto err1;
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}
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if (ssp->ss_nfinfo == 0 && ssp->ss_ninos == 0) {
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DLOG((DLOG_RF, "Empty pseg at 0x%" PRIx64 "\n", offset));
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offset = -1;
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goto err1;
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}
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if (ssp->ss_create < fs->lfs_tstamp) {
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DLOG((DLOG_RF, "Old data at 0x%" PRIx64 "\n", offset));
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offset = -1;
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goto err1;
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}
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}
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if (fs->lfs_version > 1) {
|
|
if (ssp->ss_serial != nextserial) {
|
|
DLOG((DLOG_RF, "Unexpected serial number at 0x%" PRIx64
|
|
"\n", offset));
|
|
offset = -1;
|
|
goto err1;
|
|
}
|
|
if (ssp->ss_ident != fs->lfs_ident) {
|
|
DLOG((DLOG_RF, "Incorrect fsid (0x%x vs 0x%x) at 0x%"
|
|
PRIx64 "\n", ssp->ss_ident, fs->lfs_ident, offset));
|
|
offset = -1;
|
|
goto err1;
|
|
}
|
|
}
|
|
if (pseg_flags)
|
|
*pseg_flags = ssp->ss_flags;
|
|
oldoffset = offset;
|
|
offset += lfs_btofsb(fs, fs->lfs_sumsize);
|
|
|
|
ninos = howmany(ssp->ss_ninos, LFS_INOPB(fs));
|
|
/* XXX ondisk32 */
|
|
iaddr = (int32_t *)((char*)bp->b_data + fs->lfs_sumsize - sizeof(int32_t));
|
|
if (flags & CHECK_CKSUM) {
|
|
/* Count blocks */
|
|
nblocks = 0;
|
|
fip = (FINFO *)((char*)bp->b_data + SEGSUM_SIZE(fs));
|
|
for (i = 0; i < ssp->ss_nfinfo; ++i) {
|
|
nblocks += fip->fi_nblocks;
|
|
if (fip->fi_nblocks <= 0)
|
|
break;
|
|
/* XXX ondisk32 */
|
|
fip = (FINFO *)(((char *)fip) + FINFOSIZE +
|
|
(fip->fi_nblocks * sizeof(int32_t)));
|
|
}
|
|
nblocks += ninos;
|
|
/* Create the sum array */
|
|
datap = dp = (u_long *)malloc(nblocks * sizeof(u_long),
|
|
M_SEGMENT, M_WAITOK);
|
|
}
|
|
|
|
/* Handle individual blocks */
|
|
fip = (FINFO *)((char*)bp->b_data + SEGSUM_SIZE(fs));
|
|
for (i = 0; i < ssp->ss_nfinfo || ninos; ++i) {
|
|
/* Inode block? */
|
|
if (ninos && *iaddr == offset) {
|
|
if (flags & CHECK_CKSUM) {
|
|
/* Read in the head and add to the buffer */
|
|
error = bread(devvp, LFS_FSBTODB(fs, offset), fs->lfs_bsize,
|
|
cred, 0, &dbp);
|
|
if (error) {
|
|
offset = -1;
|
|
goto err2;
|
|
}
|
|
(*dp++) = ((u_long *)(dbp->b_data))[0];
|
|
brelse(dbp, BC_AGE);
|
|
}
|
|
if (flags & CHECK_UPDATE) {
|
|
if ((error = update_inoblk(fs, offset, cred, l))
|
|
!= 0) {
|
|
offset = -1;
|
|
goto err2;
|
|
}
|
|
}
|
|
offset += lfs_btofsb(fs, fs->lfs_ibsize);
|
|
--iaddr;
|
|
--ninos;
|
|
--i; /* compensate */
|
|
continue;
|
|
}
|
|
size = fs->lfs_bsize;
|
|
for (j = 0; j < fip->fi_nblocks; ++j) {
|
|
if (j == fip->fi_nblocks - 1)
|
|
size = fip->fi_lastlength;
|
|
if (flags & CHECK_CKSUM) {
|
|
error = bread(devvp, LFS_FSBTODB(fs, offset), size,
|
|
cred, 0, &dbp);
|
|
if (error) {
|
|
offset = -1;
|
|
goto err2;
|
|
}
|
|
(*dp++) = ((u_long *)(dbp->b_data))[0];
|
|
brelse(dbp, BC_AGE);
|
|
}
|
|
/* Account for and update any direct blocks */
|
|
if ((flags & CHECK_UPDATE) &&
|
|
fip->fi_ino > LFS_IFILE_INUM &&
|
|
fip->fi_blocks[j] >= 0) {
|
|
update_meta(fs, fip->fi_ino, fip->fi_version,
|
|
fip->fi_blocks[j], offset, size, l);
|
|
}
|
|
offset += lfs_btofsb(fs, size);
|
|
}
|
|
/* XXX ondisk32 */
|
|
fip = (FINFO *)(((char *)fip) + FINFOSIZE
|
|
+ fip->fi_nblocks * sizeof(int32_t));
|
|
}
|
|
/* Checksum the array, compare */
|
|
if ((flags & CHECK_CKSUM) &&
|
|
ssp->ss_datasum != cksum(datap, nblocks * sizeof(u_long)))
|
|
{
|
|
DLOG((DLOG_RF, "Datasum error at 0x%" PRIx64
|
|
" (wanted %x got %x)\n",
|
|
offset, ssp->ss_datasum, cksum(datap, nblocks *
|
|
sizeof(u_long))));
|
|
offset = -1;
|
|
goto err2;
|
|
}
|
|
|
|
/* If we're at the end of the segment, move to the next */
|
|
if (lfs_dtosn(fs, offset + lfs_btofsb(fs, fs->lfs_sumsize + fs->lfs_bsize)) !=
|
|
lfs_dtosn(fs, offset)) {
|
|
if (lfs_dtosn(fs, offset) == lfs_dtosn(fs, ssp->ss_next)) {
|
|
offset = -1;
|
|
goto err2;
|
|
}
|
|
offset = ssp->ss_next;
|
|
DLOG((DLOG_RF, "LFS roll forward: moving to offset 0x%" PRIx64
|
|
" -> segment %d\n", offset, lfs_dtosn(fs,offset)));
|
|
}
|
|
|
|
if (flags & CHECK_UPDATE) {
|
|
fs->lfs_avail -= (offset - oldoffset);
|
|
/* Don't clog the buffer queue */
|
|
mutex_enter(&lfs_lock);
|
|
if (locked_queue_count > LFS_MAX_BUFS ||
|
|
locked_queue_bytes > LFS_MAX_BYTES) {
|
|
lfs_flush(fs, SEGM_CKP, 0);
|
|
}
|
|
mutex_exit(&lfs_lock);
|
|
}
|
|
|
|
err2:
|
|
if (flags & CHECK_CKSUM)
|
|
free(datap, M_SEGMENT);
|
|
err1:
|
|
brelse(bp, BC_AGE);
|
|
|
|
/* XXX should we update the serial number even for bad psegs? */
|
|
if ((flags & CHECK_UPDATE) && offset > 0 && fs->lfs_version > 1)
|
|
fs->lfs_serial = nextserial;
|
|
return offset;
|
|
}
|
|
|
|
void
|
|
lfs_roll_forward(struct lfs *fs, struct mount *mp, struct lwp *l)
|
|
{
|
|
int flags, dirty;
|
|
daddr_t offset, oldoffset, lastgoodpseg;
|
|
int sn, curseg, do_rollforward;
|
|
struct proc *p;
|
|
kauth_cred_t cred;
|
|
SEGUSE *sup;
|
|
struct buf *bp;
|
|
|
|
p = l ? l->l_proc : NULL;
|
|
cred = p ? p->p_cred : NOCRED;
|
|
|
|
/*
|
|
* Roll forward.
|
|
*
|
|
* We don't roll forward for v1 filesystems, because
|
|
* of the danger that the clock was turned back between the last
|
|
* checkpoint and crash. This would roll forward garbage.
|
|
*
|
|
* v2 filesystems don't have this problem because they use a
|
|
* monotonically increasing serial number instead of a timestamp.
|
|
*/
|
|
do_rollforward = (!(fs->lfs_pflags & LFS_PF_CLEAN) &&
|
|
lfs_do_rfw && fs->lfs_version > 1 && p != NULL);
|
|
if (do_rollforward) {
|
|
u_int64_t nextserial;
|
|
/*
|
|
* Phase I: Find the address of the last good partial
|
|
* segment that was written after the checkpoint. Mark
|
|
* the segments in question dirty, so they won't be
|
|
* reallocated.
|
|
*/
|
|
lastgoodpseg = oldoffset = offset = fs->lfs_offset;
|
|
flags = 0x0;
|
|
DLOG((DLOG_RF, "LFS roll forward phase 1: start at offset 0x%"
|
|
PRIx64 "\n", offset));
|
|
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
|
|
if (!(sup->su_flags & SEGUSE_DIRTY))
|
|
--fs->lfs_nclean;
|
|
sup->su_flags |= SEGUSE_DIRTY;
|
|
LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, offset), bp);
|
|
nextserial = fs->lfs_serial + 1;
|
|
while ((offset = check_segsum(fs, offset, nextserial,
|
|
cred, CHECK_CKSUM, &flags, l)) > 0) {
|
|
nextserial++;
|
|
if (lfs_sntod(fs, oldoffset) != lfs_sntod(fs, offset)) {
|
|
LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, oldoffset),
|
|
bp);
|
|
if (!(sup->su_flags & SEGUSE_DIRTY))
|
|
--fs->lfs_nclean;
|
|
sup->su_flags |= SEGUSE_DIRTY;
|
|
LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, oldoffset),
|
|
bp);
|
|
}
|
|
|
|
DLOG((DLOG_RF, "LFS roll forward phase 1: offset=0x%"
|
|
PRIx64 "\n", offset));
|
|
if (flags & SS_DIROP) {
|
|
DLOG((DLOG_RF, "lfs_mountfs: dirops at 0x%"
|
|
PRIx64 "\n", oldoffset));
|
|
if (!(flags & SS_CONT)) {
|
|
DLOG((DLOG_RF, "lfs_mountfs: dirops end "
|
|
"at 0x%" PRIx64 "\n", oldoffset));
|
|
}
|
|
}
|
|
if (!(flags & SS_CONT))
|
|
lastgoodpseg = offset;
|
|
oldoffset = offset;
|
|
}
|
|
if (flags & SS_CONT) {
|
|
DLOG((DLOG_RF, "LFS roll forward: warning: incomplete "
|
|
"dirops discarded\n"));
|
|
}
|
|
DLOG((DLOG_RF, "LFS roll forward phase 1: completed: "
|
|
"lastgoodpseg=0x%" PRIx64 "\n", lastgoodpseg));
|
|
oldoffset = fs->lfs_offset;
|
|
if (fs->lfs_offset != lastgoodpseg) {
|
|
/* Don't overwrite what we're trying to preserve */
|
|
offset = fs->lfs_offset;
|
|
fs->lfs_offset = lastgoodpseg;
|
|
fs->lfs_curseg = lfs_sntod(fs, lfs_dtosn(fs, fs->lfs_offset));
|
|
for (sn = curseg = lfs_dtosn(fs, fs->lfs_curseg);;) {
|
|
sn = (sn + 1) % fs->lfs_nseg;
|
|
if (sn == curseg)
|
|
panic("lfs_mountfs: no clean segments");
|
|
LFS_SEGENTRY(sup, fs, sn, bp);
|
|
dirty = (sup->su_flags & SEGUSE_DIRTY);
|
|
brelse(bp, 0);
|
|
if (!dirty)
|
|
break;
|
|
}
|
|
fs->lfs_nextseg = lfs_sntod(fs, sn);
|
|
|
|
/*
|
|
* Phase II: Roll forward from the first superblock.
|
|
*/
|
|
while (offset != lastgoodpseg) {
|
|
DLOG((DLOG_RF, "LFS roll forward phase 2: 0x%"
|
|
PRIx64 "\n", offset));
|
|
offset = check_segsum(fs, offset,
|
|
fs->lfs_serial + 1, cred, CHECK_UPDATE,
|
|
NULL, l);
|
|
}
|
|
|
|
/*
|
|
* Finish: flush our changes to disk.
|
|
*/
|
|
lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC);
|
|
DLOG((DLOG_RF, "lfs_mountfs: roll forward ",
|
|
"recovered %lld blocks\n",
|
|
(long long)(lastgoodpseg - oldoffset)));
|
|
}
|
|
DLOG((DLOG_RF, "LFS roll forward complete\n"));
|
|
}
|
|
}
|