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