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Commit | Line | Data |
---|---|---|
c6bd0c97 | 1 | /* |
7dec050a | 2 | * set_fields.c --- set a superblock value |
efc6f628 | 3 | * |
7dec050a | 4 | * Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o. |
efc6f628 | 5 | * |
7dec050a TT |
6 | * %Begin-Header% |
7 | * This file may be redistributed under the terms of the GNU Public | |
8 | * License. | |
9 | * %End-Header% | |
c6bd0c97 TT |
10 | */ |
11 | ||
007df860 TT |
12 | #define _XOPEN_SOURCE 600 /* for inclusion of strptime() and strtoull */ |
13 | ||
14 | #ifdef HAVE_STRTOULL | |
15 | #define STRTOULL strtoull | |
16 | #else | |
17 | #define STRTOULL strtoul | |
18 | #endif | |
619a8ea7 | 19 | |
d1154eb4 | 20 | #include "config.h" |
c6bd0c97 TT |
21 | #include <stdio.h> |
22 | #include <unistd.h> | |
23 | #include <stdlib.h> | |
24 | #include <ctype.h> | |
25 | #include <string.h> | |
8192c633 | 26 | #include <strings.h> |
c6bd0c97 TT |
27 | #include <time.h> |
28 | #include <sys/types.h> | |
29 | #include <sys/stat.h> | |
30 | #ifdef HAVE_ERRNO_H | |
31 | #include <errno.h> | |
32 | #endif | |
f7e37e8b | 33 | #include <assert.h> |
a98b51e9 TT |
34 | #if HAVE_STRINGS_H |
35 | #include <strings.h> | |
36 | #endif | |
c6bd0c97 TT |
37 | #include <fcntl.h> |
38 | #include <utime.h> | |
39 | ||
40 | #include "debugfs.h" | |
3e699064 TT |
41 | #include "uuid/uuid.h" |
42 | #include "e2p/e2p.h" | |
c6bd0c97 TT |
43 | |
44 | static struct ext2_super_block set_sb; | |
16c581d0 | 45 | static struct ext2_inode_large set_inode; |
c7c1209e | 46 | static struct ext2_group_desc set_gd; |
16c581d0 | 47 | static struct ext4_group_desc set_gd4; |
3cebf9c1 | 48 | static struct mmp_struct set_mmp; |
cf96ecf1 | 49 | static dgrp_t set_bg; |
08fd3f36 TT |
50 | static ext2_ino_t set_ino; |
51 | static int array_idx; | |
52 | ||
53 | #define FLAG_ARRAY 0x0001 | |
f7e37e8b | 54 | #define FLAG_ALIAS 0x0002 /* Data intersects with other field */ |
c6bd0c97 | 55 | |
7dec050a | 56 | struct field_set_info { |
b044c2e0 | 57 | const char *name; |
c6bd0c97 | 58 | void *ptr; |
16c581d0 | 59 | void *ptr2; |
54434927 | 60 | unsigned int size; |
16c581d0 | 61 | errcode_t (*func)(struct field_set_info *info, char *field, char *arg); |
08fd3f36 TT |
62 | int flags; |
63 | int max_idx; | |
c6bd0c97 TT |
64 | }; |
65 | ||
16c581d0 TT |
66 | static errcode_t parse_uint(struct field_set_info *info, char *field, char *arg); |
67 | static errcode_t parse_int(struct field_set_info *info, char *field, char *arg); | |
68 | static errcode_t parse_string(struct field_set_info *info, char *field, char *arg); | |
69 | static errcode_t parse_uuid(struct field_set_info *info, char *field, char *arg); | |
70 | static errcode_t parse_hashalg(struct field_set_info *info, char *field, char *arg); | |
71 | static errcode_t parse_time(struct field_set_info *info, char *field, char *arg); | |
72 | static errcode_t parse_bmap(struct field_set_info *info, char *field, char *arg); | |
73 | static errcode_t parse_gd_csum(struct field_set_info *info, char *field, char *arg); | |
3cebf9c1 TT |
74 | static errcode_t parse_mmp_clear(struct field_set_info *info, char *field, |
75 | char *arg); | |
c6bd0c97 | 76 | |
12aa7ad5 TT |
77 | #pragma GCC diagnostic push |
78 | #pragma GCC diagnostic ignored "-Wmissing-field-initializers" | |
79 | ||
7dec050a | 80 | static struct field_set_info super_fields[] = { |
16c581d0 TT |
81 | { "inodes_count", &set_sb.s_inodes_count, NULL, 4, parse_uint }, |
82 | { "blocks_count", &set_sb.s_blocks_count, &set_sb.s_blocks_count_hi, | |
83 | 4, parse_uint }, | |
84 | { "r_blocks_count", &set_sb.s_r_blocks_count, | |
85 | &set_sb.s_r_blocks_count_hi, 4, parse_uint }, | |
86 | { "free_blocks_count", &set_sb.s_free_blocks_count, | |
87 | &set_sb.s_free_blocks_hi, 4, parse_uint }, | |
88 | { "free_inodes_count", &set_sb.s_free_inodes_count, NULL, 4, parse_uint }, | |
89 | { "first_data_block", &set_sb.s_first_data_block, NULL, 4, parse_uint }, | |
90 | { "log_block_size", &set_sb.s_log_block_size, NULL, 4, parse_uint }, | |
91 | { "log_cluster_size", &set_sb.s_log_cluster_size, NULL, 4, parse_int }, | |
92 | { "blocks_per_group", &set_sb.s_blocks_per_group, NULL, 4, parse_uint }, | |
93 | { "clusters_per_group", &set_sb.s_clusters_per_group, NULL, 4, parse_uint }, | |
94 | { "inodes_per_group", &set_sb.s_inodes_per_group, NULL, 4, parse_uint }, | |
95 | { "mtime", &set_sb.s_mtime, NULL, 4, parse_time }, | |
96 | { "wtime", &set_sb.s_wtime, NULL, 4, parse_time }, | |
97 | { "mnt_count", &set_sb.s_mnt_count, NULL, 2, parse_uint }, | |
98 | { "max_mnt_count", &set_sb.s_max_mnt_count, NULL, 2, parse_int }, | |
c6bd0c97 | 99 | /* s_magic */ |
16c581d0 TT |
100 | { "state", &set_sb.s_state, NULL, 2, parse_uint }, |
101 | { "errors", &set_sb.s_errors, NULL, 2, parse_uint }, | |
102 | { "minor_rev_level", &set_sb.s_minor_rev_level, NULL, 2, parse_uint }, | |
103 | { "lastcheck", &set_sb.s_lastcheck, NULL, 4, parse_time }, | |
104 | { "checkinterval", &set_sb.s_checkinterval, NULL, 4, parse_uint }, | |
105 | { "creator_os", &set_sb.s_creator_os, NULL, 4, parse_uint }, | |
106 | { "rev_level", &set_sb.s_rev_level, NULL, 4, parse_uint }, | |
107 | { "def_resuid", &set_sb.s_def_resuid, NULL, 2, parse_uint }, | |
108 | { "def_resgid", &set_sb.s_def_resgid, NULL, 2, parse_uint }, | |
109 | { "first_ino", &set_sb.s_first_ino, NULL, 4, parse_uint }, | |
110 | { "inode_size", &set_sb.s_inode_size, NULL, 2, parse_uint }, | |
111 | { "block_group_nr", &set_sb.s_block_group_nr, NULL, 2, parse_uint }, | |
112 | { "feature_compat", &set_sb.s_feature_compat, NULL, 4, parse_uint }, | |
113 | { "feature_incompat", &set_sb.s_feature_incompat, NULL, 4, parse_uint }, | |
114 | { "feature_ro_compat", &set_sb.s_feature_ro_compat, NULL, 4, parse_uint }, | |
115 | { "uuid", &set_sb.s_uuid, NULL, 16, parse_uuid }, | |
116 | { "volume_name", &set_sb.s_volume_name, NULL, 16, parse_string }, | |
117 | { "last_mounted", &set_sb.s_last_mounted, NULL, 64, parse_string }, | |
16c581d0 | 118 | { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap, NULL, |
c6bd0c97 | 119 | 4, parse_uint }, |
16c581d0 TT |
120 | { "prealloc_blocks", &set_sb.s_prealloc_blocks, NULL, 1, parse_uint }, |
121 | { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, NULL, 1, | |
c6bd0c97 | 122 | parse_uint }, |
16c581d0 | 123 | { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, NULL, 2, |
a06bd026 | 124 | parse_uint }, |
16c581d0 TT |
125 | { "journal_uuid", &set_sb.s_journal_uuid, NULL, 16, parse_uuid }, |
126 | { "journal_inum", &set_sb.s_journal_inum, NULL, 4, parse_uint }, | |
127 | { "journal_dev", &set_sb.s_journal_dev, NULL, 4, parse_uint }, | |
128 | { "last_orphan", &set_sb.s_last_orphan, NULL, 4, parse_uint }, | |
129 | { "hash_seed", &set_sb.s_hash_seed, NULL, 16, parse_uuid }, | |
130 | { "def_hash_version", &set_sb.s_def_hash_version, NULL, 1, parse_hashalg }, | |
131 | { "jnl_backup_type", &set_sb.s_jnl_backup_type, NULL, 1, parse_uint }, | |
132 | { "desc_size", &set_sb.s_desc_size, NULL, 2, parse_uint }, | |
133 | { "default_mount_opts", &set_sb.s_default_mount_opts, NULL, 4, parse_uint }, | |
134 | { "first_meta_bg", &set_sb.s_first_meta_bg, NULL, 4, parse_uint }, | |
135 | { "mkfs_time", &set_sb.s_mkfs_time, NULL, 4, parse_time }, | |
136 | { "jnl_blocks", &set_sb.s_jnl_blocks[0], NULL, 4, parse_uint, FLAG_ARRAY, | |
89c80156 | 137 | 17 }, |
16c581d0 TT |
138 | { "min_extra_isize", &set_sb.s_min_extra_isize, NULL, 2, parse_uint }, |
139 | { "want_extra_isize", &set_sb.s_want_extra_isize, NULL, 2, parse_uint }, | |
140 | { "flags", &set_sb.s_flags, NULL, 4, parse_uint }, | |
141 | { "raid_stride", &set_sb.s_raid_stride, NULL, 2, parse_uint }, | |
0f5eba75 | 142 | { "mmp_interval", &set_sb.s_mmp_update_interval, NULL, 2, parse_uint }, |
16c581d0 TT |
143 | { "mmp_block", &set_sb.s_mmp_block, NULL, 8, parse_uint }, |
144 | { "raid_stripe_width", &set_sb.s_raid_stripe_width, NULL, 4, parse_uint }, | |
145 | { "log_groups_per_flex", &set_sb.s_log_groups_per_flex, NULL, 1, parse_uint }, | |
146 | { "kbytes_written", &set_sb.s_kbytes_written, NULL, 8, parse_uint }, | |
147 | { "snapshot_inum", &set_sb.s_snapshot_inum, NULL, 4, parse_uint }, | |
148 | { "snapshot_id", &set_sb.s_snapshot_id, NULL, 4, parse_uint }, | |
149 | { "snapshot_r_blocks_count", &set_sb.s_snapshot_r_blocks_count, | |
150 | NULL, 8, parse_uint }, | |
151 | { "snapshot_list", &set_sb.s_snapshot_list, NULL, 4, parse_uint }, | |
152 | { "mount_opts", &set_sb.s_mount_opts, NULL, 64, parse_string }, | |
153 | { "usr_quota_inum", &set_sb.s_usr_quota_inum, NULL, 4, parse_uint }, | |
154 | { "grp_quota_inum", &set_sb.s_grp_quota_inum, NULL, 4, parse_uint }, | |
155 | { "overhead_blocks", &set_sb.s_overhead_blocks, NULL, 4, parse_uint }, | |
65c6c3e0 TT |
156 | { "backup_bgs", &set_sb.s_backup_bgs[0], NULL, 4, parse_uint, |
157 | FLAG_ARRAY, 2 }, | |
16c581d0 | 158 | { "checksum", &set_sb.s_checksum, NULL, 4, parse_uint }, |
1eedf3e5 | 159 | { "checksum_type", &set_sb.s_checksum_type, NULL, 1, parse_uint }, |
fc898cb9 | 160 | { "encryption_level", &set_sb.s_encryption_level, NULL, 1, parse_uint }, |
a5116959 TT |
161 | { "error_count", &set_sb.s_error_count, NULL, 4, parse_uint }, |
162 | { "first_error_time", &set_sb.s_first_error_time, NULL, 4, parse_time }, | |
163 | { "first_error_ino", &set_sb.s_first_error_ino, NULL, 4, parse_uint }, | |
164 | { "first_error_block", &set_sb.s_first_error_block, NULL, 8, parse_uint }, | |
165 | { "first_error_func", &set_sb.s_first_error_func, NULL, 32, parse_string }, | |
f7e37e8b | 166 | { "first_error_line", &set_sb.s_first_error_line, NULL, 4, parse_uint }, |
a5116959 TT |
167 | { "last_error_time", &set_sb.s_last_error_time, NULL, 4, parse_time }, |
168 | { "last_error_ino", &set_sb.s_last_error_ino, NULL, 4, parse_uint }, | |
169 | { "last_error_block", &set_sb.s_last_error_block, NULL, 8, parse_uint }, | |
170 | { "last_error_func", &set_sb.s_last_error_func, NULL, 32, parse_string }, | |
f7e37e8b | 171 | { "last_error_line", &set_sb.s_last_error_line, NULL, 4, parse_uint }, |
22f22ab1 TT |
172 | { "encrypt_algos", &set_sb.s_encrypt_algos, NULL, 1, parse_uint, |
173 | FLAG_ARRAY, 4 }, | |
41f22101 | 174 | { "encrypt_pw_salt", &set_sb.s_encrypt_pw_salt, NULL, 16, parse_uuid }, |
fc898cb9 | 175 | { "lpf_ino", &set_sb.s_lpf_ino, NULL, 4, parse_uint }, |
c6bd0c97 TT |
176 | { 0, 0, 0, 0 } |
177 | }; | |
178 | ||
7dec050a | 179 | static struct field_set_info inode_fields[] = { |
16c581d0 TT |
180 | { "mode", &set_inode.i_mode, NULL, 2, parse_uint }, |
181 | { "uid", &set_inode.i_uid, &set_inode.osd2.linux2.l_i_uid_high, | |
182 | 2, parse_uint }, | |
183 | { "size", &set_inode.i_size, &set_inode.i_size_high, 4, parse_uint }, | |
184 | { "atime", &set_inode.i_atime, NULL, 4, parse_time }, | |
185 | { "ctime", &set_inode.i_ctime, NULL, 4, parse_time }, | |
186 | { "mtime", &set_inode.i_mtime, NULL, 4, parse_time }, | |
187 | { "dtime", &set_inode.i_dtime, NULL, 4, parse_time }, | |
188 | { "gid", &set_inode.i_gid, &set_inode.osd2.linux2.l_i_gid_high, | |
189 | 2, parse_uint }, | |
190 | { "links_count", &set_inode.i_links_count, NULL, 2, parse_uint }, | |
191 | /* Special case: i_blocks is 4 bytes, i_blocks_high is 2 bytes */ | |
192 | { "blocks", &set_inode.i_blocks, &set_inode.osd2.linux2.l_i_blocks_hi, | |
193 | 6, parse_uint }, | |
194 | { "flags", &set_inode.i_flags, NULL, 4, parse_uint }, | |
195 | { "version", &set_inode.osd1.linux1.l_i_version, | |
196 | &set_inode.i_version_hi, 4, parse_uint }, | |
f7e37e8b KK |
197 | { "translator", &set_inode.osd1.hurd1.h_i_translator, NULL, |
198 | 4, parse_uint, FLAG_ALIAS }, | |
16c581d0 | 199 | { "block", &set_inode.i_block[0], NULL, 4, parse_uint, FLAG_ARRAY, |
08fd3f36 | 200 | EXT2_NDIR_BLOCKS }, |
16c581d0 TT |
201 | { "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], NULL, 4, parse_uint }, |
202 | { "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], NULL, 4, parse_uint }, | |
203 | { "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], NULL, 4, parse_uint }, | |
204 | { "generation", &set_inode.i_generation, NULL, 4, parse_uint }, | |
205 | /* Special case: i_file_acl_high is 2 bytes */ | |
206 | { "file_acl", &set_inode.i_file_acl, | |
207 | &set_inode.osd2.linux2.l_i_file_acl_high, 6, parse_uint }, | |
f7e37e8b | 208 | { "dir_acl", &set_inode.i_dir_acl, NULL, 4, parse_uint, FLAG_ALIAS }, |
16c581d0 | 209 | { "faddr", &set_inode.i_faddr, NULL, 4, parse_uint }, |
f7e37e8b | 210 | { "frag", &set_inode.osd2.hurd2.h_i_frag, NULL, 1, parse_uint, FLAG_ALIAS }, |
16c581d0 TT |
211 | { "fsize", &set_inode.osd2.hurd2.h_i_fsize, NULL, 1, parse_uint }, |
212 | { "checksum", &set_inode.osd2.linux2.l_i_checksum_lo, | |
213 | &set_inode.i_checksum_hi, 2, parse_uint }, | |
214 | { "author", &set_inode.osd2.hurd2.h_i_author, NULL, | |
f7e37e8b | 215 | 4, parse_uint, FLAG_ALIAS }, |
16c581d0 TT |
216 | { "extra_isize", &set_inode.i_extra_isize, NULL, |
217 | 2, parse_uint }, | |
218 | { "ctime_extra", &set_inode.i_ctime_extra, NULL, | |
219 | 4, parse_uint }, | |
220 | { "mtime_extra", &set_inode.i_mtime_extra, NULL, | |
221 | 4, parse_uint }, | |
222 | { "atime_extra", &set_inode.i_atime_extra, NULL, | |
223 | 4, parse_uint }, | |
224 | { "crtime", &set_inode.i_crtime, NULL, 4, parse_uint }, | |
225 | { "crtime_extra", &set_inode.i_crtime_extra, NULL, | |
226 | 4, parse_uint }, | |
227 | { "bmap", NULL, NULL, 4, parse_bmap, FLAG_ARRAY }, | |
7dec050a TT |
228 | { 0, 0, 0, 0 } |
229 | }; | |
230 | ||
c7c1209e | 231 | static struct field_set_info ext2_bg_fields[] = { |
16c581d0 TT |
232 | { "block_bitmap", &set_gd.bg_block_bitmap, NULL, 4, parse_uint }, |
233 | { "inode_bitmap", &set_gd.bg_inode_bitmap, NULL, 4, parse_uint }, | |
234 | { "inode_table", &set_gd.bg_inode_table, NULL, 4, parse_uint }, | |
235 | { "free_blocks_count", &set_gd.bg_free_blocks_count, NULL, 2, parse_uint }, | |
236 | { "free_inodes_count", &set_gd.bg_free_inodes_count, NULL, 2, parse_uint }, | |
237 | { "used_dirs_count", &set_gd.bg_used_dirs_count, NULL, 2, parse_uint }, | |
238 | { "flags", &set_gd.bg_flags, NULL, 2, parse_uint }, | |
239 | { "itable_unused", &set_gd.bg_itable_unused, NULL, 2, parse_uint }, | |
240 | { "checksum", &set_gd.bg_checksum, NULL, 2, parse_gd_csum }, | |
c7c1209e TT |
241 | { 0, 0, 0, 0 } |
242 | }; | |
243 | ||
16c581d0 TT |
244 | static struct field_set_info ext4_bg_fields[] = { |
245 | { "block_bitmap", &set_gd4.bg_block_bitmap, | |
246 | &set_gd4.bg_block_bitmap_hi, 4, parse_uint }, | |
247 | { "inode_bitmap", &set_gd4.bg_inode_bitmap, | |
248 | &set_gd4.bg_inode_bitmap_hi, 4, parse_uint }, | |
249 | { "inode_table", &set_gd4.bg_inode_table, | |
250 | &set_gd4.bg_inode_table_hi, 4, parse_uint }, | |
251 | { "free_blocks_count", &set_gd4.bg_free_blocks_count, | |
252 | &set_gd4.bg_free_blocks_count_hi, 2, parse_uint }, | |
253 | { "free_inodes_count", &set_gd4.bg_free_inodes_count, | |
254 | &set_gd4.bg_free_inodes_count_hi, 2, parse_uint }, | |
255 | { "used_dirs_count", &set_gd4.bg_used_dirs_count, | |
256 | &set_gd4.bg_used_dirs_count_hi, 2, parse_uint }, | |
257 | { "flags", &set_gd4.bg_flags, NULL, 2, parse_uint }, | |
258 | { "exclude_bitmap", &set_gd4.bg_exclude_bitmap_lo, | |
259 | &set_gd4.bg_exclude_bitmap_hi, 4, parse_uint }, | |
260 | { "block_bitmap_csum", &set_gd4.bg_block_bitmap_csum_lo, | |
261 | &set_gd4.bg_block_bitmap_csum_hi, 2, parse_uint }, | |
262 | { "inode_bitmap_csum", &set_gd4.bg_inode_bitmap_csum_lo, | |
263 | &set_gd4.bg_inode_bitmap_csum_hi, 2, parse_uint }, | |
264 | { "itable_unused", &set_gd4.bg_itable_unused, | |
265 | &set_gd4.bg_itable_unused_hi, 2, parse_uint }, | |
266 | { "checksum", &set_gd4.bg_checksum, NULL, 2, parse_gd_csum }, | |
267 | { 0, 0, 0, 0 } | |
268 | }; | |
269 | ||
3cebf9c1 | 270 | static struct field_set_info mmp_fields[] = { |
f7e37e8b KK |
271 | { "clear", &set_mmp.mmp_magic, NULL, sizeof(set_mmp), |
272 | parse_mmp_clear, FLAG_ALIAS }, | |
3cebf9c1 TT |
273 | { "magic", &set_mmp.mmp_magic, NULL, 4, parse_uint }, |
274 | { "seq", &set_mmp.mmp_seq, NULL, 4, parse_uint }, | |
275 | { "time", &set_mmp.mmp_time, NULL, 8, parse_uint }, | |
276 | { "nodename", &set_mmp.mmp_nodename, NULL, sizeof(set_mmp.mmp_nodename), | |
277 | parse_string }, | |
278 | { "bdevname", &set_mmp.mmp_bdevname, NULL, sizeof(set_mmp.mmp_bdevname), | |
279 | parse_string }, | |
280 | { "check_interval", &set_mmp.mmp_check_interval, NULL, 2, parse_uint }, | |
a9620d8b | 281 | { "checksum", &set_mmp.mmp_checksum, NULL, 4, parse_uint }, |
f7e37e8b | 282 | { 0, 0, 0, 0 } |
3cebf9c1 | 283 | }; |
12aa7ad5 | 284 | #pragma GCC diagnostic pop |
7105c183 | 285 | |
f7e37e8b KK |
286 | #ifdef UNITTEST |
287 | ||
12aa7ad5 | 288 | |
f7e37e8b KK |
289 | static void do_verify_field_set_info(struct field_set_info *fields, |
290 | const void *data, size_t size) | |
291 | { | |
292 | struct field_set_info *ss, *ss2; | |
293 | const char *begin = (char *)data; | |
294 | const char *end = begin + size; | |
295 | ||
296 | for (ss = fields ; ss->name ; ss++) { | |
297 | const char *ptr; | |
298 | ||
299 | /* Check pointers */ | |
300 | ptr = ss->ptr; | |
301 | assert(!ptr || (ptr >= begin && ptr < end)); | |
302 | ptr = ss->ptr2; | |
303 | assert(!ptr || (ptr >= begin && ptr < end)); | |
304 | ||
305 | /* Check function */ | |
306 | assert(ss->func); | |
307 | ||
308 | for (ss2 = fields ; ss2 != ss ; ss2++) { | |
309 | /* Check duplicate names */ | |
310 | assert(strcmp(ss->name, ss2->name)); | |
311 | ||
312 | if (ss->flags & FLAG_ALIAS || ss2->flags & FLAG_ALIAS) | |
313 | continue; | |
314 | /* Check false aliases, might be copy-n-paste error */ | |
315 | assert(!ss->ptr || (ss->ptr != ss2->ptr && | |
316 | ss->ptr != ss2->ptr2)); | |
317 | assert(!ss->ptr2 || (ss->ptr2 != ss2->ptr && | |
318 | ss->ptr2 != ss2->ptr2)); | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | int main(int argc, char **argv) | |
324 | { | |
325 | do_verify_field_set_info(super_fields, &set_sb, sizeof(set_sb)); | |
326 | do_verify_field_set_info(inode_fields, &set_inode, sizeof(set_inode)); | |
327 | do_verify_field_set_info(ext2_bg_fields, &set_gd, sizeof(set_gd)); | |
328 | do_verify_field_set_info(ext4_bg_fields, &set_gd4, sizeof(set_gd4)); | |
329 | do_verify_field_set_info(mmp_fields, &set_mmp, sizeof(set_mmp)); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | ext2_filsys current_fs; | |
334 | ext2_ino_t root, cwd; | |
335 | ||
336 | #endif /* UNITTEST */ | |
337 | ||
16c581d0 TT |
338 | static int check_suffix(const char *field) |
339 | { | |
340 | int len = strlen(field); | |
341 | ||
342 | if (len <= 3) | |
343 | return 0; | |
344 | field += len-3; | |
345 | if (!strcmp(field, "_lo")) | |
346 | return 1; | |
347 | if (!strcmp(field, "_hi")) | |
348 | return 2; | |
349 | return 0; | |
350 | } | |
c7c1209e | 351 | |
7dec050a TT |
352 | static struct field_set_info *find_field(struct field_set_info *fields, |
353 | char *field) | |
c6bd0c97 | 354 | { |
7dec050a | 355 | struct field_set_info *ss; |
08fd3f36 TT |
356 | const char *prefix; |
357 | char *arg, *delim, *idx, *tmp; | |
16c581d0 | 358 | int suffix, prefix_len; |
08fd3f36 TT |
359 | |
360 | if (fields == super_fields) | |
361 | prefix = "s_"; | |
c7c1209e | 362 | else if (fields == inode_fields) |
08fd3f36 | 363 | prefix = "i_"; |
c7c1209e TT |
364 | else |
365 | prefix = "bg_"; | |
366 | prefix_len = strlen(prefix); | |
367 | if (strncmp(field, prefix, prefix_len) == 0) | |
368 | field += prefix_len; | |
08fd3f36 TT |
369 | |
370 | arg = malloc(strlen(field)+1); | |
371 | if (!arg) | |
372 | return NULL; | |
373 | strcpy(arg, field); | |
374 | ||
375 | idx = strchr(arg, '['); | |
376 | if (idx) { | |
377 | *idx++ = 0; | |
378 | delim = idx + strlen(idx) - 1; | |
379 | if (!*idx || *delim != ']') | |
380 | idx = 0; | |
381 | else | |
382 | *delim = 0; | |
383 | } | |
efc6f628 | 384 | /* |
08fd3f36 TT |
385 | * Can we parse the number? |
386 | */ | |
387 | if (idx) { | |
388 | array_idx = strtol(idx, &tmp, 0); | |
59a591f6 TT |
389 | if (*tmp) { |
390 | *(--idx) = '['; | |
391 | *delim = ']'; | |
08fd3f36 | 392 | idx = 0; |
59a591f6 | 393 | } |
08fd3f36 TT |
394 | } |
395 | ||
16c581d0 TT |
396 | /* |
397 | * If there is a valid _hi or a _lo suffix, strip it off | |
398 | */ | |
399 | suffix = check_suffix(arg); | |
400 | if (suffix > 0) | |
401 | arg[strlen(arg)-3] = 0; | |
402 | ||
7dec050a | 403 | for (ss = fields ; ss->name ; ss++) { |
16c581d0 TT |
404 | if (suffix && ss->ptr2 == 0) |
405 | continue; | |
08fd3f36 TT |
406 | if (ss->flags & FLAG_ARRAY) { |
407 | if (!idx || (strcmp(ss->name, arg) != 0)) | |
408 | continue; | |
409 | if (ss->max_idx > 0 && array_idx >= ss->max_idx) | |
410 | continue; | |
411 | } else { | |
16c581d0 | 412 | if (strcmp(ss->name, arg) != 0) |
08fd3f36 TT |
413 | continue; |
414 | } | |
6e9761c2 | 415 | free(arg); |
08fd3f36 | 416 | return ss; |
c6bd0c97 | 417 | } |
6e9761c2 | 418 | free(arg); |
c6bd0c97 TT |
419 | return NULL; |
420 | } | |
421 | ||
16c581d0 TT |
422 | /* |
423 | * Note: info->size == 6 is special; this means a base size 4 bytes, | |
424 | * and secondiory (high) size of 2 bytes. This is needed for the | |
425 | * special case of i_blocks_high and i_file_acl_high. | |
426 | */ | |
427 | static errcode_t parse_uint(struct field_set_info *info, char *field, | |
428 | char *arg) | |
c6bd0c97 | 429 | { |
16c581d0 TT |
430 | unsigned long long n, num, mask, limit; |
431 | int suffix = check_suffix(field); | |
c6bd0c97 | 432 | char *tmp; |
16c581d0 TT |
433 | void *field1 = info->ptr, *field2 = info->ptr2; |
434 | int size = (info->size == 6) ? 4 : info->size; | |
08fd3f36 | 435 | union { |
007df860 | 436 | __u64 *ptr64; |
08fd3f36 TT |
437 | __u32 *ptr32; |
438 | __u16 *ptr16; | |
439 | __u8 *ptr8; | |
440 | } u; | |
441 | ||
16c581d0 TT |
442 | if (suffix == 1) |
443 | field2 = 0; | |
444 | if (suffix == 2) { | |
445 | field1 = field2; | |
446 | field2 = 0; | |
447 | } | |
448 | ||
449 | u.ptr8 = (__u8 *) field1; | |
08fd3f36 TT |
450 | if (info->flags & FLAG_ARRAY) |
451 | u.ptr8 += array_idx * info->size; | |
c6bd0c97 | 452 | |
007df860 TT |
453 | errno = 0; |
454 | num = STRTOULL(arg, &tmp, 0); | |
455 | if (*tmp || errno) { | |
c6bd0c97 TT |
456 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", |
457 | arg, info->name); | |
458 | return EINVAL; | |
459 | } | |
16c581d0 | 460 | mask = ~0ULL >> ((8 - size) * 8); |
007df860 | 461 | limit = ~0ULL >> ((8 - info->size) * 8); |
16c581d0 TT |
462 | if (field2 && info->size != 6) |
463 | limit = ~0ULL >> ((8 - info->size*2) * 8); | |
464 | ||
007df860 TT |
465 | if (num > limit) { |
466 | fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n", | |
467 | arg, info->name, limit); | |
468 | return EINVAL; | |
469 | } | |
16c581d0 TT |
470 | n = num & mask; |
471 | switch (size) { | |
007df860 | 472 | case 8: |
7c1384c3 TT |
473 | /* Should never get here */ |
474 | fprintf(stderr, "64-bit field %s has a second 64-bit field\n" | |
475 | "defined; BUG?!?\n", info->name); | |
476 | *u.ptr64 = 0; | |
007df860 | 477 | break; |
c6bd0c97 | 478 | case 4: |
16c581d0 | 479 | *u.ptr32 = n; |
c6bd0c97 TT |
480 | break; |
481 | case 2: | |
16c581d0 | 482 | *u.ptr16 = n; |
c6bd0c97 TT |
483 | break; |
484 | case 1: | |
16c581d0 TT |
485 | *u.ptr8 = n; |
486 | break; | |
487 | } | |
488 | if (!field2) | |
489 | return 0; | |
490 | n = num >> (size*8); | |
491 | u.ptr8 = (__u8 *) field2; | |
492 | if (info->size == 6) | |
493 | size = 2; | |
494 | switch (size) { | |
495 | case 8: | |
496 | *u.ptr64 = n; | |
497 | break; | |
498 | case 4: | |
499 | *u.ptr32 = n; | |
500 | break; | |
501 | case 2: | |
502 | *u.ptr16 = n; | |
503 | break; | |
504 | case 1: | |
505 | *u.ptr8 = n; | |
c6bd0c97 TT |
506 | break; |
507 | } | |
508 | return 0; | |
509 | } | |
510 | ||
3cebf9c1 TT |
511 | static errcode_t parse_int(struct field_set_info *info, |
512 | char *field EXT2FS_ATTR((unused)), char *arg) | |
c6bd0c97 TT |
513 | { |
514 | long num; | |
515 | char *tmp; | |
516 | __s32 *ptr32; | |
517 | __s16 *ptr16; | |
518 | __s8 *ptr8; | |
519 | ||
520 | num = strtol(arg, &tmp, 0); | |
521 | if (*tmp) { | |
522 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", | |
523 | arg, info->name); | |
524 | return EINVAL; | |
525 | } | |
526 | switch (info->size) { | |
527 | case 4: | |
528 | ptr32 = (__s32 *) info->ptr; | |
529 | *ptr32 = num; | |
530 | break; | |
531 | case 2: | |
532 | ptr16 = (__s16 *) info->ptr; | |
533 | *ptr16 = num; | |
534 | break; | |
535 | case 1: | |
536 | ptr8 = (__s8 *) info->ptr; | |
537 | *ptr8 = num; | |
538 | break; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
3cebf9c1 TT |
543 | static errcode_t parse_string(struct field_set_info *info, |
544 | char *field EXT2FS_ATTR((unused)), char *arg) | |
c6bd0c97 TT |
545 | { |
546 | char *cp = (char *) info->ptr; | |
547 | ||
548 | if (strlen(arg) >= info->size) { | |
549 | fprintf(stderr, "Error maximum size for %s is %d.\n", | |
550 | info->name, info->size); | |
551 | return EINVAL; | |
552 | } | |
553 | strcpy(cp, arg); | |
554 | return 0; | |
555 | } | |
556 | ||
3cebf9c1 TT |
557 | static errcode_t parse_time(struct field_set_info *info, |
558 | char *field EXT2FS_ATTR((unused)), char *arg) | |
7dec050a | 559 | { |
e3e92534 TT |
560 | time_t t; |
561 | __u32 *ptr32; | |
7dec050a TT |
562 | |
563 | ptr32 = (__u32 *) info->ptr; | |
564 | ||
4efae606 TT |
565 | t = string_to_time(arg); |
566 | ||
567 | if (t == ((time_t) -1)) { | |
568 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", | |
569 | arg, info->name); | |
570 | return EINVAL; | |
7dec050a | 571 | } |
4efae606 | 572 | *ptr32 = t; |
7dec050a TT |
573 | return 0; |
574 | } | |
575 | ||
3cebf9c1 TT |
576 | static errcode_t parse_uuid(struct field_set_info *info, |
577 | char *field EXT2FS_ATTR((unused)), char *arg) | |
f61fc0b5 | 578 | { |
3e699064 | 579 | unsigned char * p = (unsigned char *) info->ptr; |
efc6f628 | 580 | |
f61fc0b5 TT |
581 | if ((strcasecmp(arg, "null") == 0) || |
582 | (strcasecmp(arg, "clear") == 0)) { | |
583 | uuid_clear(p); | |
584 | } else if (strcasecmp(arg, "time") == 0) { | |
585 | uuid_generate_time(p); | |
586 | } else if (strcasecmp(arg, "random") == 0) { | |
587 | uuid_generate(p); | |
588 | } else if (uuid_parse(arg, p)) { | |
589 | fprintf(stderr, "Invalid UUID format: %s\n", arg); | |
590 | return EINVAL; | |
591 | } | |
592 | return 0; | |
593 | } | |
594 | ||
3cebf9c1 TT |
595 | static errcode_t parse_hashalg(struct field_set_info *info, |
596 | char *field EXT2FS_ATTR((unused)), char *arg) | |
f61fc0b5 TT |
597 | { |
598 | int hashv; | |
599 | unsigned char *p = (unsigned char *) info->ptr; | |
600 | ||
601 | hashv = e2p_string2hash(arg); | |
602 | if (hashv < 0) { | |
603 | fprintf(stderr, "Invalid hash algorithm: %s\n", arg); | |
604 | return EINVAL; | |
605 | } | |
606 | *p = hashv; | |
607 | return 0; | |
608 | } | |
609 | ||
3cebf9c1 TT |
610 | static errcode_t parse_bmap(struct field_set_info *info, |
611 | char *field EXT2FS_ATTR((unused)), char *arg) | |
08fd3f36 | 612 | { |
4dbfd79d | 613 | blk64_t blk; |
08fd3f36 TT |
614 | errcode_t retval; |
615 | char *tmp; | |
616 | ||
4dbfd79d | 617 | blk = strtoull(arg, &tmp, 0); |
08fd3f36 TT |
618 | if (*tmp) { |
619 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", | |
620 | arg, info->name); | |
621 | return EINVAL; | |
622 | } | |
08fd3f36 | 623 | |
4dbfd79d | 624 | retval = ext2fs_bmap2(current_fs, set_ino, |
fa633bf9 DW |
625 | (struct ext2_inode *) &set_inode, |
626 | NULL, BMAP_ALLOC | BMAP_SET, array_idx, NULL, | |
627 | &blk); | |
08fd3f36 TT |
628 | if (retval) { |
629 | com_err("set_inode", retval, "while setting block map"); | |
630 | } | |
619a8ea7 | 631 | return retval; |
08fd3f36 TT |
632 | } |
633 | ||
16c581d0 TT |
634 | static errcode_t parse_gd_csum(struct field_set_info *info, char *field, |
635 | char *arg) | |
cf96ecf1 AD |
636 | { |
637 | ||
638 | if (strcmp(arg, "calc") == 0) { | |
639 | ext2fs_group_desc_csum_set(current_fs, set_bg); | |
d7cca6b0 VAH |
640 | memcpy(&set_gd, ext2fs_group_desc(current_fs, |
641 | current_fs->group_desc, | |
642 | set_bg), | |
643 | sizeof(set_gd)); | |
efc6f628 | 644 | printf("Checksum set to 0x%04x\n", |
048786d7 | 645 | ext2fs_bg_checksum(current_fs, set_bg)); |
cf96ecf1 AD |
646 | return 0; |
647 | } | |
648 | ||
16c581d0 | 649 | return parse_uint(info, field, arg); |
cf96ecf1 | 650 | } |
f61fc0b5 | 651 | |
7dec050a | 652 | static void print_possible_fields(struct field_set_info *fields) |
6e96adcb | 653 | { |
7dec050a TT |
654 | struct field_set_info *ss; |
655 | const char *type, *cmd; | |
656 | FILE *f; | |
08fd3f36 | 657 | char name[40], idx[40]; |
6e96adcb | 658 | |
7dec050a TT |
659 | if (fields == super_fields) { |
660 | type = "Superblock"; | |
661 | cmd = "set_super_value"; | |
c7c1209e | 662 | } else if (fields == inode_fields) { |
7dec050a TT |
663 | type = "Inode"; |
664 | cmd = "set_inode"; | |
7105c183 ES |
665 | } else if (fields == mmp_fields) { |
666 | type = "MMP"; | |
667 | cmd = "set_mmp_value"; | |
c7c1209e TT |
668 | } else { |
669 | type = "Block group descriptor"; | |
670 | cmd = "set_block_group"; | |
7dec050a TT |
671 | } |
672 | f = open_pager(); | |
673 | ||
674 | fprintf(f, "%s fields supported by the %s command:\n", type, cmd); | |
675 | ||
676 | for (ss = fields ; ss->name ; ss++) { | |
6e96adcb TT |
677 | type = "unknown"; |
678 | if (ss->func == parse_string) | |
679 | type = "string"; | |
680 | else if (ss->func == parse_int) | |
681 | type = "integer"; | |
682 | else if (ss->func == parse_uint) | |
683 | type = "unsigned integer"; | |
f61fc0b5 TT |
684 | else if (ss->func == parse_uuid) |
685 | type = "UUID"; | |
686 | else if (ss->func == parse_hashalg) | |
687 | type = "hash algorithm"; | |
7dec050a TT |
688 | else if (ss->func == parse_time) |
689 | type = "date/time"; | |
1d3a9511 TT |
690 | else if (ss->func == parse_bmap) |
691 | type = "set physical->logical block map"; | |
16c581d0 TT |
692 | else if (ss->func == parse_gd_csum) |
693 | type = "unsigned integer OR \"calc\""; | |
08fd3f36 TT |
694 | strcpy(name, ss->name); |
695 | if (ss->flags & FLAG_ARRAY) { | |
efc6f628 | 696 | if (ss->max_idx > 0) |
08fd3f36 TT |
697 | sprintf(idx, "[%d]", ss->max_idx); |
698 | else | |
699 | strcpy(idx, "[]"); | |
700 | strcat(name, idx); | |
701 | } | |
16c581d0 TT |
702 | if (ss->ptr2) |
703 | strcat(name, "[_hi|_lo]"); | |
704 | fprintf(f, "\t%-25s\t%s\n", name, type); | |
6e96adcb | 705 | } |
7dec050a | 706 | close_pager(f); |
6e96adcb TT |
707 | } |
708 | ||
709 | ||
c6bd0c97 TT |
710 | void do_set_super(int argc, char *argv[]) |
711 | { | |
e1018eea TT |
712 | const char *usage = "<field> <value>\n" |
713 | "\t\"set_super_value -l\" will list the names of " | |
714 | "superblock fields\n\twhich can be set."; | |
7dec050a | 715 | static struct field_set_info *ss; |
efc6f628 | 716 | |
6e96adcb | 717 | if ((argc == 2) && !strcmp(argv[1], "-l")) { |
7dec050a | 718 | print_possible_fields(super_fields); |
6e96adcb TT |
719 | return; |
720 | } | |
721 | ||
e1018eea TT |
722 | if (common_args_process(argc, argv, 3, 3, "set_super_value", |
723 | usage, CHECK_FS_RW)) | |
c6bd0c97 TT |
724 | return; |
725 | ||
7dec050a | 726 | if ((ss = find_field(super_fields, argv[1])) == 0) { |
c6bd0c97 TT |
727 | com_err(argv[0], 0, "invalid field specifier: %s", argv[1]); |
728 | return; | |
729 | } | |
730 | set_sb = *current_fs->super; | |
16c581d0 | 731 | if (ss->func(ss, argv[1], argv[2]) == 0) { |
c6bd0c97 TT |
732 | *current_fs->super = set_sb; |
733 | ext2fs_mark_super_dirty(current_fs); | |
734 | } | |
735 | } | |
7dec050a TT |
736 | |
737 | void do_set_inode(int argc, char *argv[]) | |
738 | { | |
739 | const char *usage = "<inode> <field> <value>\n" | |
1d3a9511 | 740 | "\t\"set_inode_field -l\" will list the names of " |
7dec050a TT |
741 | "the fields in an ext2 inode\n\twhich can be set."; |
742 | static struct field_set_info *ss; | |
efc6f628 | 743 | |
7dec050a TT |
744 | if ((argc == 2) && !strcmp(argv[1], "-l")) { |
745 | print_possible_fields(inode_fields); | |
746 | return; | |
747 | } | |
748 | ||
749 | if (common_args_process(argc, argv, 4, 4, "set_inode", | |
750 | usage, CHECK_FS_RW)) | |
751 | return; | |
752 | ||
753 | if ((ss = find_field(inode_fields, argv[2])) == 0) { | |
754 | com_err(argv[0], 0, "invalid field specifier: %s", argv[2]); | |
755 | return; | |
756 | } | |
757 | ||
08fd3f36 TT |
758 | set_ino = string_to_inode(argv[1]); |
759 | if (!set_ino) | |
7dec050a TT |
760 | return; |
761 | ||
16c581d0 TT |
762 | if (debugfs_read_inode_full(set_ino, |
763 | (struct ext2_inode *) &set_inode, argv[1], | |
764 | sizeof(set_inode))) | |
7dec050a TT |
765 | return; |
766 | ||
16c581d0 TT |
767 | if (ss->func(ss, argv[2], argv[3]) == 0) { |
768 | if (debugfs_write_inode_full(set_ino, | |
769 | (struct ext2_inode *) &set_inode, | |
770 | argv[1], sizeof(set_inode))) | |
7dec050a TT |
771 | return; |
772 | } | |
773 | } | |
c7c1209e TT |
774 | |
775 | void do_set_block_group_descriptor(int argc, char *argv[]) | |
776 | { | |
777 | const char *usage = "<bg number> <field> <value>\n" | |
778 | "\t\"set_block_group_descriptor -l\" will list the names of " | |
779 | "the fields in a block group descriptor\n\twhich can be set."; | |
16c581d0 | 780 | struct field_set_info *table; |
c7c1209e | 781 | struct field_set_info *ss; |
c7c1209e | 782 | char *end; |
16c581d0 TT |
783 | void *edit, *target; |
784 | int size; | |
785 | ||
786 | /* | |
2bc30417 AD |
787 | * Determine whether we are editing an ext2 or ext4 block group |
788 | * descriptor. Descriptors larger than ext4_group_desc cannot | |
789 | * have their fields edited yet, because they do not have any | |
790 | * names assigned. When that happens, this function needs to | |
791 | * be updated for the new descriptor struct and fields. | |
16c581d0 | 792 | */ |
2bc30417 AD |
793 | if (current_fs && |
794 | EXT2_DESC_SIZE(current_fs->super) >= EXT2_MIN_DESC_SIZE_64BIT) { | |
16c581d0 TT |
795 | table = ext4_bg_fields; |
796 | edit = &set_gd4; | |
797 | size = sizeof(set_gd4); | |
798 | } else { | |
799 | table = ext2_bg_fields; | |
800 | edit = &set_gd; | |
801 | size = sizeof(set_gd); | |
802 | } | |
c7c1209e TT |
803 | |
804 | if ((argc == 2) && !strcmp(argv[1], "-l")) { | |
16c581d0 | 805 | print_possible_fields(table); |
c7c1209e TT |
806 | return; |
807 | } | |
808 | ||
809 | if (common_args_process(argc, argv, 4, 4, "set_block_group_descriptor", | |
810 | usage, CHECK_FS_RW)) | |
811 | return; | |
812 | ||
813 | set_bg = strtoul(argv[1], &end, 0); | |
814 | if (*end) { | |
815 | com_err(argv[0], 0, "invalid block group number: %s", argv[1]); | |
816 | return; | |
817 | } | |
818 | ||
819 | if (set_bg >= current_fs->group_desc_count) { | |
820 | com_err(argv[0], 0, "block group number too big: %d", set_bg); | |
821 | return; | |
822 | } | |
823 | ||
16c581d0 | 824 | if ((ss = find_field(table, argv[2])) == 0) { |
c7c1209e TT |
825 | com_err(argv[0], 0, "invalid field specifier: %s", argv[2]); |
826 | return; | |
827 | } | |
828 | ||
16c581d0 TT |
829 | target = ext2fs_group_desc(current_fs, current_fs->group_desc, set_bg); |
830 | memcpy(edit, target, size); | |
831 | if (ss->func(ss, argv[2], argv[3]) == 0) { | |
832 | memcpy(target, edit, size); | |
c7c1209e TT |
833 | ext2fs_mark_super_dirty(current_fs); |
834 | } | |
835 | } | |
0f5eba75 | 836 | |
3cebf9c1 TT |
837 | static errcode_t parse_mmp_clear(struct field_set_info *info, |
838 | char *field EXT2FS_ATTR((unused)), | |
839 | char *arg EXT2FS_ATTR((unused))) | |
0f5eba75 AD |
840 | { |
841 | errcode_t retval; | |
842 | ||
843 | retval = ext2fs_mmp_clear(current_fs); | |
844 | if (retval != 0) | |
845 | com_err("set_mmp_value", retval, "while clearing MMP block\n"); | |
846 | else | |
847 | memcpy(info->ptr, current_fs->mmp_buf, info->size); | |
848 | ||
849 | return 1; /* we don't need the MMP block written again */ | |
850 | } | |
851 | ||
25f291c9 | 852 | #ifdef CONFIG_MMP |
0f5eba75 AD |
853 | void do_set_mmp_value(int argc, char *argv[]) |
854 | { | |
855 | const char *usage = "<field> <value>\n" | |
856 | "\t\"set_mmp_value -l\" will list the names of " | |
857 | "MMP fields\n\twhich can be set."; | |
858 | static struct field_set_info *smmp; | |
859 | struct mmp_struct *mmp_s; | |
860 | errcode_t retval; | |
861 | ||
862 | if (argc == 2 && strcmp(argv[1], "-l") == 0) { | |
863 | print_possible_fields(mmp_fields); | |
864 | return; | |
865 | } | |
866 | ||
7105c183 ES |
867 | if (check_fs_open(argv[0])) |
868 | return; | |
869 | ||
0f5eba75 AD |
870 | if (current_fs->super->s_mmp_block == 0) { |
871 | com_err(argv[0], 0, "no MMP block allocated\n"); | |
872 | return; | |
873 | } | |
874 | ||
875 | if (common_args_process(argc, argv, 2, 3, "set_mmp_value", | |
876 | usage, CHECK_FS_RW)) | |
877 | return; | |
878 | ||
879 | mmp_s = current_fs->mmp_buf; | |
880 | if (mmp_s == NULL) { | |
881 | retval = ext2fs_get_mem(current_fs->blocksize, &mmp_s); | |
882 | if (retval) { | |
883 | com_err(argv[0], retval, "allocating MMP buffer\n"); | |
884 | return; | |
885 | } | |
886 | retval = ext2fs_mmp_read(current_fs, | |
887 | current_fs->super->s_mmp_block, mmp_s); | |
888 | if (retval) { | |
889 | com_err(argv[0], retval, "reading MMP block %llu.\n", | |
890 | (long long)current_fs->super->s_mmp_block); | |
85b8f7af | 891 | ext2fs_free_mem(&mmp_s); |
0f5eba75 AD |
892 | return; |
893 | } | |
894 | current_fs->mmp_buf = mmp_s; | |
895 | } | |
896 | ||
897 | smmp = find_field(mmp_fields, argv[1]); | |
898 | if (smmp == 0) { | |
899 | com_err(argv[0], 0, "invalid field specifier: %s", argv[1]); | |
900 | return; | |
901 | } | |
902 | ||
903 | set_mmp = *mmp_s; | |
904 | if (smmp->func(smmp, argv[1], argv[2]) == 0) { | |
905 | ext2fs_mmp_write(current_fs, current_fs->super->s_mmp_block, | |
906 | &set_mmp); | |
907 | *mmp_s = set_mmp; | |
908 | } | |
25f291c9 | 909 | } |
d6a4bcb5 | 910 | #else |
25f291c9 TT |
911 | void do_set_mmp_value(int argc EXT2FS_ATTR((unused)), |
912 | char *argv[] EXT2FS_ATTR((unused))) | |
913 | { | |
d6a4bcb5 TB |
914 | fprintf(stdout, "MMP is unsupported, please recompile with " |
915 | "--enable-mmp\n"); | |
0f5eba75 | 916 | } |
25f291c9 | 917 | #endif |
0f5eba75 | 918 |