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