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 */
e2fsck_allocate_context(e2fsck_t * ret)20 errcode_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 */
e2fsck_reset_context(e2fsck_t ctx)54 errcode_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
e2fsck_free_context(e2fsck_t ctx)171 void 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 if (ctx->log_fn)
190 free(ctx->log_fn);
191
192 ext2fs_free_mem(&ctx);
193 }
194
195 /*
196 * This function runs through the e2fsck passes and calls them all,
197 * returning restart, abort, or cancel as necessary...
198 */
199 typedef void (*pass_t)(e2fsck_t ctx);
200
201 static pass_t e2fsck_passes[] = {
202 e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
203 e2fsck_pass5, 0 };
204
205 #define E2F_FLAG_RUN_RETURN (E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
206
e2fsck_run(e2fsck_t ctx)207 int e2fsck_run(e2fsck_t ctx)
208 {
209 int i;
210 pass_t e2fsck_pass;
211
212 #ifdef HAVE_SETJMP_H
213 if (setjmp(ctx->abort_loc)) {
214 ctx->flags &= ~E2F_FLAG_SETJMP_OK;
215 return (ctx->flags & E2F_FLAG_RUN_RETURN);
216 }
217 ctx->flags |= E2F_FLAG_SETJMP_OK;
218 #endif
219
220 for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
221 if (ctx->flags & E2F_FLAG_RUN_RETURN)
222 break;
223 if (e2fsck_mmp_update(ctx->fs))
224 fatal_error(ctx, 0);
225 e2fsck_pass(ctx);
226 if (ctx->progress)
227 (void) (ctx->progress)(ctx, 0, 0, 0);
228 }
229 ctx->flags &= ~E2F_FLAG_SETJMP_OK;
230
231 if (ctx->flags & E2F_FLAG_RUN_RETURN)
232 return (ctx->flags & E2F_FLAG_RUN_RETURN);
233 return 0;
234 }
235