Update copyright/license notices to match SGI legal prefered boilerplate.

[thirdparty/xfsprogs-dev.git] / repair / phase2.c

/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <xfs/libxlog.h>
#include "avl.h"
#include "globals.h"
#include "agheader.h"
#include "protos.h"
#include "err_protos.h"
#include "incore.h"

void	set_mp(xfs_mount_t *mpp);
void	scan_ag(xfs_agnumber_t agno);

/* workaround craziness in the xlog routines */
int xlog_recover_do_trans(xlog_t *log, xlog_recover_t *t, int p) { return 0; }

static void
zero_log(xfs_mount_t *mp)
{
	int error;
	xlog_t	log;
	xfs_daddr_t head_blk, tail_blk;
	dev_t logdev = (mp->m_sb.sb_logstart == 0) ? x.logdev : x.ddev;

	memset(&log, 0, sizeof(log));
	if (!x.logdev)
		x.logdev = x.ddev;
	x.logBBsize = XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
	x.logBBstart = XFS_FSB_TO_DADDR(mp, mp->m_sb.sb_logstart);

	log.l_dev = logdev;
	log.l_logsize = BBTOB(x.logBBsize);
	log.l_logBBsize = x.logBBsize;
	log.l_logBBstart = x.logBBstart;
	log.l_mp = mp;

	if ((error = xlog_find_tail(&log, &head_blk, &tail_blk, 0))) {
		do_warn(_("zero_log: cannot find log head/tail "
			  "(xlog_find_tail=%d), zeroing it anyway\n"),
			error);
	} else {
		if (verbose) {
			do_warn(_("zero_log: head block %lld tail block %lld\n"),
				head_blk, tail_blk);
		}
		if (head_blk != tail_blk) {
			if (zap_log) {
				do_warn(_(
"ALERT: The filesystem has valuable metadata changes in a log which is being\n"
"destroyed because the -L option was used.\n"));
			} else {
				do_warn(_(
"ERROR: The filesystem has valuable metadata changes in a log which needs to\n"
"be replayed.  Mount the filesystem to replay the log, and unmount it before\n"
"re-running xfs_repair.  If you are unable to mount the filesystem, then use\n"
"the -L option to destroy the log and attempt a repair.\n"
"Note that destroying the log may cause corruption -- please attempt a mount\n"
"of the filesystem before doing this.\n"));
				exit(2);
			}
		}
	}

	libxfs_log_clear(logdev,
		XFS_FSB_TO_DADDR(mp, mp->m_sb.sb_logstart),
		(xfs_extlen_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks),
		&mp->m_sb.sb_uuid,
		XFS_SB_VERSION_HASLOGV2(&mp->m_sb) ? 2 : 1,
		mp->m_sb.sb_logsunit, XLOG_FMT);
}

/*
 * ok, at this point, the fs is mounted but the root inode may be
 * trashed and the ag headers haven't been checked.  So we have
 * a valid xfs_mount_t and superblock but that's about it.  That
 * means we can use macros that use mount/sb fields in calculations
 * but I/O or btree routines that depend on space maps or inode maps
 * being correct are verboten.
 */

void
phase2(xfs_mount_t *mp)
{
	xfs_agnumber_t		i;
	xfs_agblock_t		b;
	int			j;
	ino_tree_node_t		*ino_rec;

	/* now we can start using the buffer cache routines */
	set_mp(mp);

	/* Check whether this fs has internal or external log */
	if (mp->m_sb.sb_logstart == 0) {
		if (!x.logname)
			do_error(_("This filesystem has an external log.  "
				   "Specify log device with the -l option.\n"));

		do_log(_("Phase 2 - using external log on %s\n"), x.logname);
	} else
		do_log(_("Phase 2 - using internal log\n"));

	/* Zero log if applicable */
	if (!no_modify)  {
		do_log(_("        - zero log...\n"));
		zero_log(mp);
	}

	do_log(_("        - scan filesystem freespace and inode maps...\n"));

	/*
	 * account for space used by ag headers and log if internal
	 */
	set_bmap_log(mp);
	set_bmap_fs(mp);

	bad_ino_btree = 0;

	for (i = 0; i < mp->m_sb.sb_agcount; i++)  {
		scan_ag(i);
#ifdef XR_INODE_TRACE
		print_inode_list(i);
#endif
	}

	/*
	 * make sure we know about the root inode chunk
	 */
	if ((ino_rec = find_inode_rec(0, mp->m_sb.sb_rootino)) == NULL)  {
		ASSERT(mp->m_sb.sb_rbmino == mp->m_sb.sb_rootino + 1 &&
			mp->m_sb.sb_rsumino == mp->m_sb.sb_rootino + 2);
		do_warn(_("root inode chunk not found\n"));

		/*
		 * mark the first 3 used, the rest are free
		 */
		ino_rec = set_inode_used_alloc(0,
				(xfs_agino_t) mp->m_sb.sb_rootino);
		set_inode_used(ino_rec, 1);
		set_inode_used(ino_rec, 2);

		for (j = 3; j < XFS_INODES_PER_CHUNK; j++)
			set_inode_free(ino_rec, j);

		/*
		 * also mark blocks
		 */
		for (b = 0; b < mp->m_ialloc_blks; b++)  {
			set_agbno_state(mp, 0,
				b + XFS_INO_TO_AGBNO(mp, mp->m_sb.sb_rootino),
				XR_E_INO);
		}
	} else  {
		do_log(_("        - found root inode chunk\n"));

		/*
		 * blocks are marked, just make sure they're in use
		 */
		if (is_inode_free(ino_rec, 0))  {
			do_warn(_("root inode marked free, "));
			set_inode_used(ino_rec, 0);
			if (!no_modify)
				do_warn(_("correcting\n"));
			else
				do_warn(_("would correct\n"));
		}

		if (is_inode_free(ino_rec, 1))  {
			do_warn(_("realtime bitmap inode marked free, "));
			set_inode_used(ino_rec, 1);
			if (!no_modify)
				do_warn(_("correcting\n"));
			else
				do_warn(_("would correct\n"));
		}

		if (is_inode_free(ino_rec, 2))  {
			do_warn(_("realtime summary inode marked free, "));
			set_inode_used(ino_rec, 2);
			if (!no_modify)
				do_warn(_("correcting\n"));
			else
				do_warn(_("would correct\n"));
		}
	}
}