pass4.c revision f3db3566b5e1342e49dffc5ec3f418a838584194 
1/*
2 * pass4.c -- pass #4 of e2fsck: Check reference counts
3 *
4 * Copyright (C) 1993 Theodore Ts'o.  This file may be redistributed
5 * under the terms of the GNU Public License.
6 *
7 */
8
9#include "e2fsck.h"
10
11void pass4(ext2_filsys fs)
12{
13	ino_t	i;
14	struct ext2_inode	inode;
15	struct resource_track	rtrack;
16
17	init_resource_track(&rtrack);
18
19#ifdef MTRACE
20	mtrace_print("Pass 4");
21#endif
22
23	if (!preen)
24		printf("Pass 4: Checking reference counts\n");
25	for (i=1; i <= fs->super->s_inodes_count; i++) {
26		if (i == EXT2_BAD_INO ||
27		    (i > EXT2_ROOT_INO && i < EXT2_FIRST_INO))
28			continue;
29		if (!(ext2fs_test_inode_bitmap(inode_used_map, i)))
30			continue;
31		if (inode_count[i] == 0) {
32			/*
33			 * Inode isn't attached to the filesystem;
34			 * prompt to reconnect.
35			 */
36			printf("Unattached inode %lu\n", i);
37			preenhalt();
38			if (ask("Connect to /lost+found", 1)) {
39				if (reconnect_file(fs, i))
40					ext2fs_unmark_valid(fs);
41			} else
42				ext2fs_unmark_valid(fs);
43		}
44		if (inode_count[i] != inode_link_info[i]) {
45			e2fsck_read_inode(fs, i, &inode, "pass4");
46			if (inode_link_info[i] != inode.i_links_count) {
47				printf("WARNING: PROGRAMMING BUG IN E2FSCK!\n");
48				printf("inode_link_info[%d] is %lu, "
49				       "inode.i_links_count is %d.  "
50				       "They should be the same!\n",
51				       i, inode_link_info[i],
52				       inode.i_links_count);
53			}
54			printf("Inode %lu has ref count %d, expecting %d.\n",
55			       i, inode.i_links_count, inode_count[i]);
56			if (ask("Set i_nlinks to count", 1)) {
57				inode.i_links_count = inode_count[i];
58				e2fsck_write_inode(fs, i, &inode, "pass4");
59			} else
60				ext2fs_unmark_valid(fs);
61		}
62	}
63	free(inode_link_info);	inode_link_info = 0;
64	free(inode_count);	inode_count = 0;
65	if (tflag > 1) {
66		printf("Pass 4: ");
67		print_resource_track(&rtrack);
68	}
69}
70
71