pass3.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>

#include <string.h>

#include "fsck.h"

void
pass3(void)
{
	struct inoinfo *inp;
	int loopcnt, inpindex, state;
	ino_t orphan;
	struct inode ip;
	struct inodesc idesc;
	char namebuf[UFS_MAXNAMLEN+1];

	for (inpindex = inplast - 1; inpindex >= 0; inpindex--) {
		if (got_siginfo) {
			printf("%s: phase 3: dir %d of %d (%d%%)\n", cdevname,
			    (int)(inplast - inpindex - 1), (int)inplast,
			    (int)((inplast - inpindex - 1) * 100 / inplast));
			got_siginfo = 0;
		}
		if (got_sigalarm) {
			setproctitle("%s p3 %d%%", cdevname,
			    (int)((inplast - inpindex - 1) * 100 / inplast));
			got_sigalarm = 0;
		}
		inp = inpsort[inpindex];
		state = inoinfo(inp->i_number)->ino_state;
		if (inp->i_number == UFS_ROOTINO ||
		    (inp->i_parent != 0 && !S_IS_DUNFOUND(state)))
			continue;
		if (state == DCLEAR || state == DZLINK)
			continue;
		/*
		 * If we are running with soft updates and we come
		 * across unreferenced directories, we just leave
		 * them in DSTATE which will cause them to be pitched
		 * in pass 4.
		 */
		if ((preen || bkgrdflag) &&
		    resolved && usedsoftdep && S_IS_DUNFOUND(state)) {
			if (inp->i_dotdot >= UFS_ROOTINO)
				inoinfo(inp->i_dotdot)->ino_linkcnt++;
			continue;
		}
		for (loopcnt = 0; ; loopcnt++) {
			orphan = inp->i_number;
			if (inp->i_parent == 0 ||
			    !INO_IS_DUNFOUND(inp->i_parent) ||
			    loopcnt > countdirs)
				break;
			inp = getinoinfo(inp->i_parent);
		}
		if (loopcnt <= countdirs) {
			if (linkup(orphan, inp->i_dotdot, NULL)) {
				inp->i_parent = inp->i_dotdot = lfdir;
				inoinfo(lfdir)->ino_linkcnt--;
				inoinfo(orphan)->ino_state = DFOUND;
				check_dirdepth(inp);
				propagate();
			}
			continue;
		}
		pfatal("ORPHANED DIRECTORY LOOP DETECTED I=%lu",
		    (u_long)orphan);
		if (reply("RECONNECT") == 0)
			continue;
		memset(&idesc, 0, sizeof(struct inodesc));
		idesc.id_type = DATA;
		idesc.id_number = inp->i_parent;
		idesc.id_parent = orphan;
		idesc.id_func = findname;
		idesc.id_name = namebuf;
		ginode(inp->i_parent, &ip);
		if ((ckinode(ip.i_dp, &idesc) & FOUND) == 0)
			pfatal("COULD NOT FIND NAME IN PARENT DIRECTORY");
		if (linkup(orphan, inp->i_parent, namebuf)) {
			idesc.id_func = clearentry;
			if (ckinode(ip.i_dp, &idesc) & FOUND)
				inoinfo(orphan)->ino_linkcnt++;
			inp->i_parent = inp->i_dotdot = lfdir;
			inoinfo(lfdir)->ino_linkcnt--;
		}
		irelse(&ip);
		inoinfo(orphan)->ino_state = DFOUND;
		check_dirdepth(inp);
		propagate();
	}
}