e2fsck.c revision b0e91c89257d906324d6081c952157f768dfc699 
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 "config.h"
13#include <errno.h>
14
15#include "e2fsck.h"
16#include "problem.h"
17
18/*
19 * This function allocates an e2fsck context
20 */
21errcode_t e2fsck_allocate_context(e2fsck_t *ret)
22{
23	e2fsck_t	context;
24	errcode_t	retval;
25	char		*time_env;
26
27	retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &context);
28	if (retval)
29		return retval;
30
31	memset(context, 0, sizeof(struct e2fsck_struct));
32
33	context->process_inode_size = 256;
34	context->ext_attr_ver = 2;
35	context->blocks_per_page = 1;
36	context->htree_slack_percentage = 255;
37
38	time_env = getenv("E2FSCK_TIME");
39	if (time_env)
40		context->now = strtoul(time_env, NULL, 0);
41	else {
42		context->now = time(0);
43		if (context->now < 1262322000) /* January 1 2010 */
44			context->flags |= E2F_FLAG_TIME_INSANE;
45	}
46
47	*ret = context;
48	return 0;
49}
50
51/*
52 * This function resets an e2fsck context; it is called when e2fsck
53 * needs to be restarted.
54 */
55errcode_t e2fsck_reset_context(e2fsck_t ctx)
56{
57	int	i;
58
59	ctx->flags &= E2F_RESET_FLAGS;
60	ctx->lost_and_found = 0;
61	ctx->bad_lost_and_found = 0;
62	if (ctx->inode_used_map) {
63		ext2fs_free_inode_bitmap(ctx->inode_used_map);
64		ctx->inode_used_map = 0;
65	}
66	if (ctx->inode_dir_map) {
67		ext2fs_free_inode_bitmap(ctx->inode_dir_map);
68		ctx->inode_dir_map = 0;
69	}
70	if (ctx->inode_reg_map) {
71		ext2fs_free_inode_bitmap(ctx->inode_reg_map);
72		ctx->inode_reg_map = 0;
73	}
74	if (ctx->block_found_map) {
75		ext2fs_free_block_bitmap(ctx->block_found_map);
76		ctx->block_found_map = 0;
77	}
78	if (ctx->inode_link_info) {
79		ext2fs_free_icount(ctx->inode_link_info);
80		ctx->inode_link_info = 0;
81	}
82	if (ctx->journal_io) {
83		if (ctx->fs && ctx->fs->io != ctx->journal_io)
84			io_channel_close(ctx->journal_io);
85		ctx->journal_io = 0;
86	}
87	if (ctx->fs && ctx->fs->dblist) {
88		ext2fs_free_dblist(ctx->fs->dblist);
89		ctx->fs->dblist = 0;
90	}
91	e2fsck_free_dir_info(ctx);
92#ifdef ENABLE_HTREE
93	e2fsck_free_dx_dir_info(ctx);
94#endif
95	if (ctx->refcount) {
96		ea_refcount_free(ctx->refcount);
97		ctx->refcount = 0;
98	}
99	if (ctx->refcount_extra) {
100		ea_refcount_free(ctx->refcount_extra);
101		ctx->refcount_extra = 0;
102	}
103	if (ctx->block_dup_map) {
104		ext2fs_free_block_bitmap(ctx->block_dup_map);
105		ctx->block_dup_map = 0;
106	}
107	if (ctx->block_ea_map) {
108		ext2fs_free_block_bitmap(ctx->block_ea_map);
109		ctx->block_ea_map = 0;
110	}
111	if (ctx->inode_bb_map) {
112		ext2fs_free_inode_bitmap(ctx->inode_bb_map);
113		ctx->inode_bb_map = 0;
114	}
115	if (ctx->inode_bad_map) {
116		ext2fs_free_inode_bitmap(ctx->inode_bad_map);
117		ctx->inode_bad_map = 0;
118	}
119	if (ctx->inode_imagic_map) {
120		ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
121		ctx->inode_imagic_map = 0;
122	}
123	if (ctx->dirs_to_hash) {
124		ext2fs_u32_list_free(ctx->dirs_to_hash);
125		ctx->dirs_to_hash = 0;
126	}
127
128	/*
129	 * Clear the array of invalid meta-data flags
130	 */
131	if (ctx->invalid_inode_bitmap_flag) {
132		ext2fs_free_mem(&ctx->invalid_inode_bitmap_flag);
133		ctx->invalid_inode_bitmap_flag = 0;
134	}
135	if (ctx->invalid_block_bitmap_flag) {
136		ext2fs_free_mem(&ctx->invalid_block_bitmap_flag);
137		ctx->invalid_block_bitmap_flag = 0;
138	}
139	if (ctx->invalid_inode_table_flag) {
140		ext2fs_free_mem(&ctx->invalid_inode_table_flag);
141		ctx->invalid_inode_table_flag = 0;
142	}
143
144	/* Clear statistic counters */
145	ctx->fs_directory_count = 0;
146	ctx->fs_regular_count = 0;
147	ctx->fs_blockdev_count = 0;
148	ctx->fs_chardev_count = 0;
149	ctx->fs_links_count = 0;
150	ctx->fs_symlinks_count = 0;
151	ctx->fs_fast_symlinks_count = 0;
152	ctx->fs_fifo_count = 0;
153	ctx->fs_total_count = 0;
154	ctx->fs_badblocks_count = 0;
155	ctx->fs_sockets_count = 0;
156	ctx->fs_ind_count = 0;
157	ctx->fs_dind_count = 0;
158	ctx->fs_tind_count = 0;
159	ctx->fs_fragmented = 0;
160	ctx->fs_fragmented_dir = 0;
161	ctx->large_files = 0;
162
163	for (i=0; i < MAX_EXTENT_DEPTH_COUNT; i++)
164		ctx->extent_depth_count[i] = 0;
165
166	/* Reset the superblock to the user's requested value */
167	ctx->superblock = ctx->use_superblock;
168
169	return 0;
170}
171
172void e2fsck_free_context(e2fsck_t ctx)
173{
174	if (!ctx)
175		return;
176
177	e2fsck_reset_context(ctx);
178	if (ctx->blkid)
179		blkid_put_cache(ctx->blkid);
180
181	if (ctx->profile)
182		profile_release(ctx->profile);
183
184	if (ctx->filesystem_name)
185		ext2fs_free_mem(&ctx->filesystem_name);
186
187	if (ctx->device_name)
188		ext2fs_free_mem(&ctx->device_name);
189
190	if (ctx->log_fn)
191		free(ctx->log_fn);
192
193	ext2fs_free_mem(&ctx);
194}
195
196/*
197 * This function runs through the e2fsck passes and calls them all,
198 * returning restart, abort, or cancel as necessary...
199 */
200typedef void (*pass_t)(e2fsck_t ctx);
201
202pass_t e2fsck_passes[] = {
203	e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
204	e2fsck_pass5, 0 };
205
206#define E2F_FLAG_RUN_RETURN	(E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
207
208int e2fsck_run(e2fsck_t ctx)
209{
210	int	i;
211	pass_t	e2fsck_pass;
212
213#ifdef HAVE_SETJMP_H
214	if (setjmp(ctx->abort_loc)) {
215		ctx->flags &= ~E2F_FLAG_SETJMP_OK;
216		return (ctx->flags & E2F_FLAG_RUN_RETURN);
217	}
218	ctx->flags |= E2F_FLAG_SETJMP_OK;
219#endif
220
221	for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
222		if (ctx->flags & E2F_FLAG_RUN_RETURN)
223			break;
224		if (e2fsck_mmp_update(ctx->fs))
225			fatal_error(ctx, 0);
226		e2fsck_pass(ctx);
227		if (ctx->progress)
228			(void) (ctx->progress)(ctx, 0, 0, 0);
229	}
230	ctx->flags &= ~E2F_FLAG_SETJMP_OK;
231
232	if (ctx->flags & E2F_FLAG_RUN_RETURN)
233		return (ctx->flags & E2F_FLAG_RUN_RETURN);
234	return 0;
235}
236