icheck.c revision e1018eeaa3285cd0ca26986d929194c1b577d211 
1/*
2 * icheck.c --- given a list of blocks, generate a list of inodes
3 *
4 * Copyright (C) 1994 Theodore Ts'o.  This file may be redistributed
5 * under the terms of the GNU Public License.
6 */
7
8#include <stdio.h>
9#include <unistd.h>
10#include <stdlib.h>
11#include <ctype.h>
12#include <string.h>
13#include <time.h>
14#ifdef HAVE_ERRNO_H
15#include <errno.h>
16#endif
17#include <sys/types.h>
18
19#include "debugfs.h"
20
21struct block_info {
22	blk_t		blk;
23	ext2_ino_t	ino;
24};
25
26struct block_walk_struct {
27	struct block_info	*barray;
28	e2_blkcnt_t		blocks_left;
29	e2_blkcnt_t		num_blocks;
30	ext2_ino_t		inode;
31};
32
33static int icheck_proc(ext2_filsys fs,
34		       blk_t	*block_nr,
35		       e2_blkcnt_t blockcnt,
36		       blk_t ref_block,
37		       int ref_offset,
38		       void *private)
39{
40	struct block_walk_struct *bw = (struct block_walk_struct *) private;
41	e2_blkcnt_t	i;
42
43	for (i=0; i < bw->num_blocks; i++) {
44		if (bw->barray[i].blk == *block_nr) {
45			bw->barray[i].ino = bw->inode;
46			bw->blocks_left--;
47		}
48	}
49	if (!bw->blocks_left)
50		return BLOCK_ABORT;
51
52	return 0;
53}
54
55void do_icheck(int argc, char **argv)
56{
57	struct block_walk_struct bw;
58	struct block_info	*binfo;
59	int			i;
60	ext2_inode_scan		scan = 0;
61	ext2_ino_t		ino;
62	struct ext2_inode	inode;
63	errcode_t		retval;
64	char			*block_buf;
65
66	if (argc < 2) {
67		com_err(argv[0], 0, "Usage: icheck <block number> ...");
68		return;
69	}
70	if (check_fs_open(argv[0]))
71		return;
72
73	bw.barray = malloc(sizeof(struct block_info) * argc);
74	if (!bw.barray) {
75		com_err("icheck", ENOMEM,
76			"while allocating inode info array");
77		return;
78	}
79	memset(bw.barray, 0, sizeof(struct block_info) * argc);
80
81	block_buf = malloc(current_fs->blocksize * 3);
82	if (!block_buf) {
83		com_err("icheck", ENOMEM, "while allocating block buffer");
84		goto error_out;
85	}
86
87	for (i=1; i < argc; i++) {
88		if (strtoblk(argv[0], argv[i], &bw.barray[i-1].blk))
89			return;
90	}
91
92	bw.num_blocks = bw.blocks_left = argc-1;
93
94	retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
95	if (retval) {
96		com_err("icheck", retval, "while opening inode scan");
97		goto error_out;
98	}
99
100	do {
101		retval = ext2fs_get_next_inode(scan, &ino, &inode);
102	} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
103	if (retval) {
104		com_err("icheck", retval, "while starting inode scan");
105		goto error_out;
106	}
107
108	while (ino) {
109		if (!inode.i_links_count)
110			goto next;
111		if (!ext2fs_inode_has_valid_blocks(&inode))
112			goto next;
113		/*
114		 * To handle filesystems touched by 0.3c extfs; can be
115		 * removed later.
116		 */
117		if (inode.i_dtime)
118			goto next;
119
120		bw.inode = ino;
121
122		retval = ext2fs_block_iterate2(current_fs, ino, 0, block_buf,
123					       icheck_proc, &bw);
124		if (retval) {
125			com_err("icheck", retval,
126				"while calling ext2fs_block_iterate");
127			goto next;
128		}
129
130		if (bw.blocks_left == 0)
131			break;
132
133	next:
134		do {
135			retval = ext2fs_get_next_inode(scan, &ino, &inode);
136		} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
137		if (retval) {
138			com_err("icheck", retval,
139				"while doing inode scan");
140			goto error_out;
141		}
142	}
143
144	printf("Block\tInode number\n");
145	for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
146		if (binfo->ino == 0) {
147			printf("%u\t<block not found>\n", binfo->blk);
148			continue;
149		}
150		printf("%u\t%u\n", binfo->blk, binfo->ino);
151	}
152
153error_out:
154	free(bw.barray);
155	free(block_buf);
156	if (scan)
157		ext2fs_close_inode_scan(scan);
158	return;
159}
160