e2fsck.c revision 246501c612cb8309dc81b354b785405bbeef05ce 
1/*
2 * e2fsck.c - a consistency checker for the new extended file system.
3 *
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12#include <errno.h>
13
14#include "e2fsck.h"
15#include "problem.h"
16
17/*
18 * This function allocates an e2fsck context
19 */
20errcode_t e2fsck_allocate_context(e2fsck_t *ret)
21{
22	e2fsck_t	context;
23	errcode_t	retval;
24
25	retval = ext2fs_get_mem(sizeof(struct e2fsck_struct),
26				(void **) &context);
27	if (retval)
28		return retval;
29
30	memset(context, 0, sizeof(struct e2fsck_struct));
31
32	context->process_inode_size = 256;
33
34	*ret = context;
35	return 0;
36}
37
38/*
39 * This function resets an e2fsck context; it is called when e2fsck
40 * needs to be restarted.
41 */
42errcode_t e2fsck_reset_context(e2fsck_t ctx)
43{
44	ctx->flags = 0;
45	if (ctx->inode_used_map) {
46		ext2fs_free_inode_bitmap(ctx->inode_used_map);
47		ctx->inode_used_map = 0;
48	}
49	if (ctx->inode_dir_map) {
50		ext2fs_free_inode_bitmap(ctx->inode_dir_map);
51		ctx->inode_dir_map = 0;
52	}
53	if (ctx->block_found_map) {
54		ext2fs_free_block_bitmap(ctx->block_found_map);
55		ctx->block_found_map = 0;
56	}
57	if (ctx->inode_link_info) {
58		ext2fs_free_icount(ctx->inode_link_info);
59		ctx->inode_link_info = 0;
60	}
61	if (ctx->fs->dblist) {
62		ext2fs_free_dblist(ctx->fs->dblist);
63		ctx->fs->dblist = 0;
64	}
65	e2fsck_free_dir_info(ctx);
66	if (ctx->block_dup_map) {
67		ext2fs_free_block_bitmap(ctx->block_dup_map);
68		ctx->block_dup_map = 0;
69	}
70	if (ctx->inode_bb_map) {
71		ext2fs_free_inode_bitmap(ctx->inode_bb_map);
72		ctx->inode_bb_map = 0;
73	}
74	if (ctx->inode_bad_map) {
75		ext2fs_free_inode_bitmap(ctx->inode_bad_map);
76		ctx->inode_bad_map = 0;
77	}
78
79	/*
80	 * Clear the array of invalid meta-data flags
81	 */
82	if (ctx->invalid_inode_bitmap_flag) {
83		ext2fs_free_mem((void **) &ctx->invalid_inode_bitmap_flag);
84		ctx->invalid_inode_bitmap_flag = 0;
85	}
86	if (ctx->invalid_block_bitmap_flag) {
87		ext2fs_free_mem((void **) &ctx->invalid_block_bitmap_flag);
88		ctx->invalid_block_bitmap_flag = 0;
89	}
90	if (ctx->invalid_inode_table_flag) {
91		ext2fs_free_mem((void **) &ctx->invalid_inode_table_flag);
92		ctx->invalid_inode_table_flag = 0;
93	}
94
95	/* Clear statistic counters */
96	ctx->fs_directory_count = 0;
97	ctx->fs_regular_count = 0;
98	ctx->fs_blockdev_count = 0;
99	ctx->fs_chardev_count = 0;
100	ctx->fs_links_count = 0;
101	ctx->fs_symlinks_count = 0;
102	ctx->fs_fast_symlinks_count = 0;
103	ctx->fs_fifo_count = 0;
104	ctx->fs_total_count = 0;
105	ctx->fs_badblocks_count = 0;
106	ctx->fs_sockets_count = 0;
107	ctx->fs_ind_count = 0;
108	ctx->fs_dind_count = 0;
109	ctx->fs_tind_count = 0;
110	ctx->fs_fragmented = 0;
111	ctx->large_files = 0;
112
113	/* Reset the superblock to the user's requested value */
114	ctx->superblock = ctx->use_superblock;
115
116	return 0;
117}
118
119void e2fsck_free_context(e2fsck_t ctx)
120{
121	if (!ctx)
122		return;
123
124	e2fsck_reset_context(ctx);
125
126	ext2fs_free_mem((void **) &ctx);
127}
128
129/*
130 * This function runs through the e2fsck passes and calls them all,
131 * returning restart, abort, or cancel as necessary...
132 */
133typedef void (*pass_t)(e2fsck_t ctx);
134
135pass_t e2fsck_passes[] = {
136	e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
137	e2fsck_pass5, 0 };
138
139#define E2F_FLAG_RUN_RETURN	(E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
140
141int e2fsck_run(e2fsck_t ctx)
142{
143	int	i;
144	pass_t	e2fsck_pass;
145
146#ifdef HAVE_SETJMP_H
147	if (setjmp(ctx->abort_loc))
148		return (ctx->flags & E2F_FLAG_RUN_RETURN);
149	ctx->flags |= E2F_FLAG_SETJMP_OK;
150#endif
151
152	for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
153		if (ctx->flags & E2F_FLAG_RUN_RETURN)
154			break;
155		e2fsck_pass(ctx);
156	}
157	ctx->flags &= ~E2F_FLAG_SETJMP_OK;
158
159	if (ctx->flags & E2F_FLAG_RUN_RETURN)
160		return (ctx->flags & E2F_FLAG_RUN_RETURN);
161	return 0;
162}
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