e2fsck.c revision 65f0aab98b20b5994a726ab90d355248bcddfffd 
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	char		*time_env;
25
26	retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &context);
27	if (retval)
28		return retval;
29
30	memset(context, 0, sizeof(struct e2fsck_struct));
31
32	context->process_inode_size = 256;
33	context->ext_attr_ver = 2;
34	context->blocks_per_page = 1;
35	context->htree_slack_percentage = 255;
36
37	time_env = getenv("E2FSCK_TIME");
38	if (time_env)
39		context->now = strtoul(time_env, NULL, 0);
40	else {
41		context->now = time(0);
42		if (context->now < 1262322000) /* January 1 2010 */
43			context->flags |= E2F_FLAG_TIME_INSANE;
44	}
45
46	*ret = context;
47	return 0;
48}
49
50/*
51 * This function resets an e2fsck context; it is called when e2fsck
52 * needs to be restarted.
53 */
54errcode_t e2fsck_reset_context(e2fsck_t ctx)
55{
56	int	i;
57
58	ctx->flags &= E2F_RESET_FLAGS;
59	ctx->lost_and_found = 0;
60	ctx->bad_lost_and_found = 0;
61	if (ctx->inode_used_map) {
62		ext2fs_free_inode_bitmap(ctx->inode_used_map);
63		ctx->inode_used_map = 0;
64	}
65	if (ctx->inode_dir_map) {
66		ext2fs_free_inode_bitmap(ctx->inode_dir_map);
67		ctx->inode_dir_map = 0;
68	}
69	if (ctx->inode_reg_map) {
70		ext2fs_free_inode_bitmap(ctx->inode_reg_map);
71		ctx->inode_reg_map = 0;
72	}
73	if (ctx->block_found_map) {
74		ext2fs_free_block_bitmap(ctx->block_found_map);
75		ctx->block_found_map = 0;
76	}
77	if (ctx->inode_link_info) {
78		ext2fs_free_icount(ctx->inode_link_info);
79		ctx->inode_link_info = 0;
80	}
81	if (ctx->journal_io) {
82		if (ctx->fs && ctx->fs->io != ctx->journal_io)
83			io_channel_close(ctx->journal_io);
84		ctx->journal_io = 0;
85	}
86	if (ctx->fs && ctx->fs->dblist) {
87		ext2fs_free_dblist(ctx->fs->dblist);
88		ctx->fs->dblist = 0;
89	}
90	e2fsck_free_dir_info(ctx);
91#ifdef ENABLE_HTREE
92	e2fsck_free_dx_dir_info(ctx);
93#endif
94	if (ctx->refcount) {
95		ea_refcount_free(ctx->refcount);
96		ctx->refcount = 0;
97	}
98	if (ctx->refcount_extra) {
99		ea_refcount_free(ctx->refcount_extra);
100		ctx->refcount_extra = 0;
101	}
102	if (ctx->block_dup_map) {
103		ext2fs_free_block_bitmap(ctx->block_dup_map);
104		ctx->block_dup_map = 0;
105	}
106	if (ctx->block_ea_map) {
107		ext2fs_free_block_bitmap(ctx->block_ea_map);
108		ctx->block_ea_map = 0;
109	}
110	if (ctx->inode_bb_map) {
111		ext2fs_free_inode_bitmap(ctx->inode_bb_map);
112		ctx->inode_bb_map = 0;
113	}
114	if (ctx->inode_bad_map) {
115		ext2fs_free_inode_bitmap(ctx->inode_bad_map);
116		ctx->inode_bad_map = 0;
117	}
118	if (ctx->inode_imagic_map) {
119		ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
120		ctx->inode_imagic_map = 0;
121	}
122	if (ctx->dirs_to_hash) {
123		ext2fs_u32_list_free(ctx->dirs_to_hash);
124		ctx->dirs_to_hash = 0;
125	}
126
127	/*
128	 * Clear the array of invalid meta-data flags
129	 */
130	if (ctx->invalid_inode_bitmap_flag) {
131		ext2fs_free_mem(&ctx->invalid_inode_bitmap_flag);
132		ctx->invalid_inode_bitmap_flag = 0;
133	}
134	if (ctx->invalid_block_bitmap_flag) {
135		ext2fs_free_mem(&ctx->invalid_block_bitmap_flag);
136		ctx->invalid_block_bitmap_flag = 0;
137	}
138	if (ctx->invalid_inode_table_flag) {
139		ext2fs_free_mem(&ctx->invalid_inode_table_flag);
140		ctx->invalid_inode_table_flag = 0;
141	}
142
143	/* Clear statistic counters */
144	ctx->fs_directory_count = 0;
145	ctx->fs_regular_count = 0;
146	ctx->fs_blockdev_count = 0;
147	ctx->fs_chardev_count = 0;
148	ctx->fs_links_count = 0;
149	ctx->fs_symlinks_count = 0;
150	ctx->fs_fast_symlinks_count = 0;
151	ctx->fs_fifo_count = 0;
152	ctx->fs_total_count = 0;
153	ctx->fs_badblocks_count = 0;
154	ctx->fs_sockets_count = 0;
155	ctx->fs_ind_count = 0;
156	ctx->fs_dind_count = 0;
157	ctx->fs_tind_count = 0;
158	ctx->fs_fragmented = 0;
159	ctx->fs_fragmented_dir = 0;
160	ctx->large_files = 0;
161
162	for (i=0; i < MAX_EXTENT_DEPTH_COUNT; i++)
163		ctx->extent_depth_count[i] = 0;
164
165	/* Reset the superblock to the user's requested value */
166	ctx->superblock = ctx->use_superblock;
167
168	return 0;
169}
170
171void e2fsck_free_context(e2fsck_t ctx)
172{
173	if (!ctx)
174		return;
175
176	e2fsck_reset_context(ctx);
177	if (ctx->blkid)
178		blkid_put_cache(ctx->blkid);
179
180	if (ctx->profile)
181		profile_release(ctx->profile);
182
183	if (ctx->filesystem_name)
184		ext2fs_free_mem(&ctx->filesystem_name);
185
186	if (ctx->device_name)
187		ext2fs_free_mem(&ctx->device_name);
188
189	ext2fs_free_mem(&ctx);
190}
191
192/*
193 * This function runs through the e2fsck passes and calls them all,
194 * returning restart, abort, or cancel as necessary...
195 */
196typedef void (*pass_t)(e2fsck_t ctx);
197
198pass_t e2fsck_passes[] = {
199	e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
200	e2fsck_pass5, 0 };
201
202#define E2F_FLAG_RUN_RETURN	(E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
203
204int e2fsck_run(e2fsck_t ctx)
205{
206	int	i;
207	pass_t	e2fsck_pass;
208
209#ifdef HAVE_SETJMP_H
210	if (setjmp(ctx->abort_loc)) {
211		ctx->flags &= ~E2F_FLAG_SETJMP_OK;
212		return (ctx->flags & E2F_FLAG_RUN_RETURN);
213	}
214	ctx->flags |= E2F_FLAG_SETJMP_OK;
215#endif
216
217	for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
218		if (ctx->flags & E2F_FLAG_RUN_RETURN)
219			break;
220		e2fsck_pass(ctx);
221		if (ctx->progress)
222			(void) (ctx->progress)(ctx, 0, 0, 0);
223	}
224	ctx->flags &= ~E2F_FLAG_SETJMP_OK;
225
226	if (ctx->flags & E2F_FLAG_RUN_RETURN)
227		return (ctx->flags & E2F_FLAG_RUN_RETURN);
228	return 0;
229}
230