e2fsck.c revision c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4e 
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), &context);
26	if (retval)
27		return retval;
28
29	memset(context, 0, sizeof(struct e2fsck_struct));
30
31	context->process_inode_size = 256;
32	context->ext_attr_ver = 2;
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	ctx->lost_and_found = 0;
46	ctx->bad_lost_and_found = 0;
47	if (ctx->inode_used_map) {
48		ext2fs_free_inode_bitmap(ctx->inode_used_map);
49		ctx->inode_used_map = 0;
50	}
51	if (ctx->inode_dir_map) {
52		ext2fs_free_inode_bitmap(ctx->inode_dir_map);
53		ctx->inode_dir_map = 0;
54	}
55	if (ctx->inode_reg_map) {
56		ext2fs_free_inode_bitmap(ctx->inode_reg_map);
57		ctx->inode_reg_map = 0;
58	}
59	if (ctx->block_found_map) {
60		ext2fs_free_block_bitmap(ctx->block_found_map);
61		ctx->block_found_map = 0;
62	}
63	if (ctx->inode_link_info) {
64		ext2fs_free_icount(ctx->inode_link_info);
65		ctx->inode_link_info = 0;
66	}
67	if (ctx->journal_io) {
68		if (ctx->fs && ctx->fs->io != ctx->journal_io)
69			io_channel_close(ctx->journal_io);
70		ctx->journal_io = 0;
71	}
72	if (ctx->fs && ctx->fs->dblist) {
73		ext2fs_free_dblist(ctx->fs->dblist);
74		ctx->fs->dblist = 0;
75	}
76	e2fsck_free_dir_info(ctx);
77#ifdef ENABLE_HTREE
78	e2fsck_free_dx_dir_info(ctx);
79#endif
80	if (ctx->refcount) {
81		ea_refcount_free(ctx->refcount);
82		ctx->refcount = 0;
83	}
84	if (ctx->refcount_extra) {
85		ea_refcount_free(ctx->refcount_extra);
86		ctx->refcount_extra = 0;
87	}
88	if (ctx->block_dup_map) {
89		ext2fs_free_block_bitmap(ctx->block_dup_map);
90		ctx->block_dup_map = 0;
91	}
92	if (ctx->block_ea_map) {
93		ext2fs_free_block_bitmap(ctx->block_ea_map);
94		ctx->block_ea_map = 0;
95	}
96	if (ctx->inode_bb_map) {
97		ext2fs_free_inode_bitmap(ctx->inode_bb_map);
98		ctx->inode_bb_map = 0;
99	}
100	if (ctx->inode_bad_map) {
101		ext2fs_free_inode_bitmap(ctx->inode_bad_map);
102		ctx->inode_bad_map = 0;
103	}
104	if (ctx->inode_imagic_map) {
105		ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
106		ctx->inode_imagic_map = 0;
107	}
108	if (ctx->dirs_to_hash) {
109		ext2fs_u32_list_free(ctx->dirs_to_hash);
110		ctx->dirs_to_hash = 0;
111	}
112
113	/*
114	 * Clear the array of invalid meta-data flags
115	 */
116	if (ctx->invalid_inode_bitmap_flag) {
117		ext2fs_free_mem(&ctx->invalid_inode_bitmap_flag);
118		ctx->invalid_inode_bitmap_flag = 0;
119	}
120	if (ctx->invalid_block_bitmap_flag) {
121		ext2fs_free_mem(&ctx->invalid_block_bitmap_flag);
122		ctx->invalid_block_bitmap_flag = 0;
123	}
124	if (ctx->invalid_inode_table_flag) {
125		ext2fs_free_mem(&ctx->invalid_inode_table_flag);
126		ctx->invalid_inode_table_flag = 0;
127	}
128
129	/* Clear statistic counters */
130	ctx->fs_directory_count = 0;
131	ctx->fs_regular_count = 0;
132	ctx->fs_blockdev_count = 0;
133	ctx->fs_chardev_count = 0;
134	ctx->fs_links_count = 0;
135	ctx->fs_symlinks_count = 0;
136	ctx->fs_fast_symlinks_count = 0;
137	ctx->fs_fifo_count = 0;
138	ctx->fs_total_count = 0;
139	ctx->fs_badblocks_count = 0;
140	ctx->fs_sockets_count = 0;
141	ctx->fs_ind_count = 0;
142	ctx->fs_dind_count = 0;
143	ctx->fs_tind_count = 0;
144	ctx->fs_fragmented = 0;
145	ctx->large_files = 0;
146
147	/* Reset the superblock to the user's requested value */
148	ctx->superblock = ctx->use_superblock;
149
150	return 0;
151}
152
153void e2fsck_free_context(e2fsck_t ctx)
154{
155	if (!ctx)
156		return;
157
158	e2fsck_reset_context(ctx);
159	if (ctx->blkid)
160		blkid_put_cache(ctx->blkid);
161
162	ext2fs_free_mem(&ctx);
163}
164
165/*
166 * This function runs through the e2fsck passes and calls them all,
167 * returning restart, abort, or cancel as necessary...
168 */
169typedef void (*pass_t)(e2fsck_t ctx);
170
171pass_t e2fsck_passes[] = {
172	e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
173	e2fsck_pass5, 0 };
174
175#define E2F_FLAG_RUN_RETURN	(E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
176
177int e2fsck_run(e2fsck_t ctx)
178{
179	int	i;
180	pass_t	e2fsck_pass;
181
182#ifdef HAVE_SETJMP_H
183	if (setjmp(ctx->abort_loc))
184		return (ctx->flags & E2F_FLAG_RUN_RETURN);
185	ctx->flags |= E2F_FLAG_SETJMP_OK;
186#endif
187
188	for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
189		if (ctx->flags & E2F_FLAG_RUN_RETURN)
190			break;
191		e2fsck_pass(ctx);
192		if (ctx->progress)
193			(void) (ctx->progress)(ctx, 0, 0, 0);
194	}
195	ctx->flags &= ~E2F_FLAG_SETJMP_OK;
196
197	if (ctx->flags & E2F_FLAG_RUN_RETURN)
198		return (ctx->flags & E2F_FLAG_RUN_RETURN);
199	return 0;
200}
201