2 * set_fields.c --- set a superblock value
4 * Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Public
12 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() and strtoull */
15 #define STRTOULL strtoull
17 #define STRTOULL strtoul
28 #include <sys/types.h>
41 #include "uuid/uuid.h"
43 #include "support/quotaio.h"
45 static struct ext2_super_block set_sb
;
46 static struct ext2_inode_large set_inode
;
47 static struct ext2_group_desc set_gd
;
48 static struct ext4_group_desc set_gd4
;
49 static struct mmp_struct set_mmp
;
51 static ext2_ino_t set_ino
;
54 #define FLAG_ARRAY 0x0001
55 #define FLAG_ALIAS 0x0002 /* Data intersects with other field */
57 struct field_set_info
{
62 errcode_t (*func
)(struct field_set_info
*info
, char *field
, char *arg
);
67 static errcode_t
parse_uint(struct field_set_info
*info
, char *field
, char *arg
);
68 static errcode_t
parse_int(struct field_set_info
*info
, char *field
, char *arg
);
69 static errcode_t
parse_string(struct field_set_info
*info
, char *field
, char *arg
);
70 static errcode_t
parse_uuid(struct field_set_info
*info
, char *field
, char *arg
);
71 static errcode_t
parse_hashalg(struct field_set_info
*info
, char *field
, char *arg
);
72 static errcode_t
parse_time(struct field_set_info
*info
, char *field
, char *arg
);
73 static errcode_t
parse_bmap(struct field_set_info
*info
, char *field
, char *arg
);
74 static errcode_t
parse_gd_csum(struct field_set_info
*info
, char *field
, char *arg
);
75 static errcode_t
parse_mmp_clear(struct field_set_info
*info
, char *field
,
78 #pragma GCC diagnostic push
79 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
81 static struct field_set_info super_fields
[] = {
82 { "inodes_count", &set_sb
.s_inodes_count
, NULL
, 4, parse_uint
},
83 { "blocks_count", &set_sb
.s_blocks_count
, &set_sb
.s_blocks_count_hi
,
85 { "r_blocks_count", &set_sb
.s_r_blocks_count
,
86 &set_sb
.s_r_blocks_count_hi
, 4, parse_uint
},
87 { "free_blocks_count", &set_sb
.s_free_blocks_count
,
88 &set_sb
.s_free_blocks_hi
, 4, parse_uint
},
89 { "free_inodes_count", &set_sb
.s_free_inodes_count
, NULL
, 4, parse_uint
},
90 { "first_data_block", &set_sb
.s_first_data_block
, NULL
, 4, parse_uint
},
91 { "log_block_size", &set_sb
.s_log_block_size
, NULL
, 4, parse_uint
},
92 { "log_cluster_size", &set_sb
.s_log_cluster_size
, NULL
, 4, parse_int
},
93 { "blocks_per_group", &set_sb
.s_blocks_per_group
, NULL
, 4, parse_uint
},
94 { "clusters_per_group", &set_sb
.s_clusters_per_group
, NULL
, 4, parse_uint
},
95 { "inodes_per_group", &set_sb
.s_inodes_per_group
, NULL
, 4, parse_uint
},
96 { "mtime", &set_sb
.s_mtime
, NULL
, 4, parse_time
},
97 { "wtime", &set_sb
.s_wtime
, NULL
, 4, parse_time
},
98 { "mnt_count", &set_sb
.s_mnt_count
, NULL
, 2, parse_uint
},
99 { "max_mnt_count", &set_sb
.s_max_mnt_count
, NULL
, 2, parse_int
},
101 { "state", &set_sb
.s_state
, NULL
, 2, parse_uint
},
102 { "errors", &set_sb
.s_errors
, NULL
, 2, parse_uint
},
103 { "minor_rev_level", &set_sb
.s_minor_rev_level
, NULL
, 2, parse_uint
},
104 { "lastcheck", &set_sb
.s_lastcheck
, NULL
, 4, parse_time
},
105 { "checkinterval", &set_sb
.s_checkinterval
, NULL
, 4, parse_uint
},
106 { "creator_os", &set_sb
.s_creator_os
, NULL
, 4, parse_uint
},
107 { "rev_level", &set_sb
.s_rev_level
, NULL
, 4, parse_uint
},
108 { "def_resuid", &set_sb
.s_def_resuid
, NULL
, 2, parse_uint
},
109 { "def_resgid", &set_sb
.s_def_resgid
, NULL
, 2, parse_uint
},
110 { "first_ino", &set_sb
.s_first_ino
, NULL
, 4, parse_uint
},
111 { "inode_size", &set_sb
.s_inode_size
, NULL
, 2, parse_uint
},
112 { "block_group_nr", &set_sb
.s_block_group_nr
, NULL
, 2, parse_uint
},
113 { "feature_compat", &set_sb
.s_feature_compat
, NULL
, 4, parse_uint
},
114 { "feature_incompat", &set_sb
.s_feature_incompat
, NULL
, 4, parse_uint
},
115 { "feature_ro_compat", &set_sb
.s_feature_ro_compat
, NULL
, 4, parse_uint
},
116 { "uuid", &set_sb
.s_uuid
, NULL
, 16, parse_uuid
},
117 { "volume_name", &set_sb
.s_volume_name
, NULL
, 16, parse_string
},
118 { "last_mounted", &set_sb
.s_last_mounted
, NULL
, 64, parse_string
},
119 { "algorithm_usage_bitmap", &set_sb
.s_algorithm_usage_bitmap
, NULL
,
121 { "prealloc_blocks", &set_sb
.s_prealloc_blocks
, NULL
, 1, parse_uint
},
122 { "prealloc_dir_blocks", &set_sb
.s_prealloc_dir_blocks
, NULL
, 1,
124 { "reserved_gdt_blocks", &set_sb
.s_reserved_gdt_blocks
, NULL
, 2,
126 { "journal_uuid", &set_sb
.s_journal_uuid
, NULL
, 16, parse_uuid
},
127 { "journal_inum", &set_sb
.s_journal_inum
, NULL
, 4, parse_uint
},
128 { "journal_dev", &set_sb
.s_journal_dev
, NULL
, 4, parse_uint
},
129 { "last_orphan", &set_sb
.s_last_orphan
, NULL
, 4, parse_uint
},
130 { "hash_seed", &set_sb
.s_hash_seed
, NULL
, 16, parse_uuid
},
131 { "def_hash_version", &set_sb
.s_def_hash_version
, NULL
, 1, parse_hashalg
},
132 { "jnl_backup_type", &set_sb
.s_jnl_backup_type
, NULL
, 1, parse_uint
},
133 { "desc_size", &set_sb
.s_desc_size
, NULL
, 2, parse_uint
},
134 { "default_mount_opts", &set_sb
.s_default_mount_opts
, NULL
, 4, parse_uint
},
135 { "first_meta_bg", &set_sb
.s_first_meta_bg
, NULL
, 4, parse_uint
},
136 { "mkfs_time", &set_sb
.s_mkfs_time
, NULL
, 4, parse_time
},
137 { "jnl_blocks", &set_sb
.s_jnl_blocks
[0], NULL
, 4, parse_uint
, FLAG_ARRAY
,
139 { "min_extra_isize", &set_sb
.s_min_extra_isize
, NULL
, 2, parse_uint
},
140 { "want_extra_isize", &set_sb
.s_want_extra_isize
, NULL
, 2, parse_uint
},
141 { "flags", &set_sb
.s_flags
, NULL
, 4, parse_uint
},
142 { "raid_stride", &set_sb
.s_raid_stride
, NULL
, 2, parse_uint
},
143 { "mmp_interval", &set_sb
.s_mmp_update_interval
, NULL
, 2, parse_uint
},
144 { "mmp_block", &set_sb
.s_mmp_block
, NULL
, 8, parse_uint
},
145 { "raid_stripe_width", &set_sb
.s_raid_stripe_width
, NULL
, 4, parse_uint
},
146 { "log_groups_per_flex", &set_sb
.s_log_groups_per_flex
, NULL
, 1, parse_uint
},
147 { "kbytes_written", &set_sb
.s_kbytes_written
, NULL
, 8, parse_uint
},
148 { "snapshot_inum", &set_sb
.s_snapshot_inum
, NULL
, 4, parse_uint
},
149 { "snapshot_id", &set_sb
.s_snapshot_id
, NULL
, 4, parse_uint
},
150 { "snapshot_r_blocks_count", &set_sb
.s_snapshot_r_blocks_count
,
151 NULL
, 8, parse_uint
},
152 { "snapshot_list", &set_sb
.s_snapshot_list
, NULL
, 4, parse_uint
},
153 { "mount_opts", &set_sb
.s_mount_opts
, NULL
, 64, parse_string
},
154 { "usr_quota_inum", &set_sb
.s_usr_quota_inum
, NULL
, 4, parse_uint
},
155 { "grp_quota_inum", &set_sb
.s_grp_quota_inum
, NULL
, 4, parse_uint
},
156 { "prj_quota_inum", &set_sb
.s_prj_quota_inum
, NULL
, 4, parse_uint
},
157 { "overhead_blocks", &set_sb
.s_overhead_blocks
, NULL
, 4, parse_uint
},
158 { "backup_bgs", &set_sb
.s_backup_bgs
[0], NULL
, 4, parse_uint
,
160 { "checksum", &set_sb
.s_checksum
, NULL
, 4, parse_uint
},
161 { "checksum_type", &set_sb
.s_checksum_type
, NULL
, 1, parse_uint
},
162 { "encryption_level", &set_sb
.s_encryption_level
, NULL
, 1, parse_uint
},
163 { "error_count", &set_sb
.s_error_count
, NULL
, 4, parse_uint
},
164 { "first_error_time", &set_sb
.s_first_error_time
, NULL
, 4, parse_time
},
165 { "first_error_ino", &set_sb
.s_first_error_ino
, NULL
, 4, parse_uint
},
166 { "first_error_block", &set_sb
.s_first_error_block
, NULL
, 8, parse_uint
},
167 { "first_error_func", &set_sb
.s_first_error_func
, NULL
, 32, parse_string
},
168 { "first_error_line", &set_sb
.s_first_error_line
, NULL
, 4, parse_uint
},
169 { "last_error_time", &set_sb
.s_last_error_time
, NULL
, 4, parse_time
},
170 { "last_error_ino", &set_sb
.s_last_error_ino
, NULL
, 4, parse_uint
},
171 { "last_error_block", &set_sb
.s_last_error_block
, NULL
, 8, parse_uint
},
172 { "last_error_func", &set_sb
.s_last_error_func
, NULL
, 32, parse_string
},
173 { "last_error_line", &set_sb
.s_last_error_line
, NULL
, 4, parse_uint
},
174 { "encrypt_algos", &set_sb
.s_encrypt_algos
, NULL
, 1, parse_uint
,
176 { "encrypt_pw_salt", &set_sb
.s_encrypt_pw_salt
, NULL
, 16, parse_uuid
},
177 { "lpf_ino", &set_sb
.s_lpf_ino
, NULL
, 4, parse_uint
},
178 { "checksum_seed", &set_sb
.s_checksum_seed
, NULL
, 4, parse_uint
},
182 static struct field_set_info inode_fields
[] = {
183 { "mode", &set_inode
.i_mode
, NULL
, 2, parse_uint
},
184 { "uid", &set_inode
.i_uid
, &set_inode
.osd2
.linux2
.l_i_uid_high
,
186 { "size", &set_inode
.i_size
, &set_inode
.i_size_high
, 4, parse_uint
},
187 { "atime", &set_inode
.i_atime
, &set_inode
.i_atime_extra
,
189 { "ctime", &set_inode
.i_ctime
, &set_inode
.i_ctime_extra
,
191 { "mtime", &set_inode
.i_mtime
, &set_inode
.i_mtime_extra
,
193 { "dtime", &set_inode
.i_dtime
, NULL
,
195 { "gid", &set_inode
.i_gid
, &set_inode
.osd2
.linux2
.l_i_gid_high
,
197 { "links_count", &set_inode
.i_links_count
, NULL
, 2, parse_uint
},
198 /* Special case: i_blocks is 4 bytes, i_blocks_high is 2 bytes */
199 { "blocks", &set_inode
.i_blocks
, &set_inode
.osd2
.linux2
.l_i_blocks_hi
,
201 { "flags", &set_inode
.i_flags
, NULL
, 4, parse_uint
},
202 { "version", &set_inode
.osd1
.linux1
.l_i_version
,
203 &set_inode
.i_version_hi
, 4, parse_uint
},
204 { "translator", &set_inode
.osd1
.hurd1
.h_i_translator
, NULL
,
205 4, parse_uint
, FLAG_ALIAS
},
206 { "block", &set_inode
.i_block
[0], NULL
, 4, parse_uint
, FLAG_ARRAY
,
208 { "block[IND]", &set_inode
.i_block
[EXT2_IND_BLOCK
], NULL
, 4, parse_uint
},
209 { "block[DIND]", &set_inode
.i_block
[EXT2_DIND_BLOCK
], NULL
, 4, parse_uint
},
210 { "block[TIND]", &set_inode
.i_block
[EXT2_TIND_BLOCK
], NULL
, 4, parse_uint
},
211 { "generation", &set_inode
.i_generation
, NULL
, 4, parse_uint
},
212 /* Special case: i_file_acl_high is 2 bytes */
213 { "file_acl", &set_inode
.i_file_acl
,
214 &set_inode
.osd2
.linux2
.l_i_file_acl_high
, 6, parse_uint
},
215 { "faddr", &set_inode
.i_faddr
, NULL
, 4, parse_uint
},
216 { "frag", &set_inode
.osd2
.hurd2
.h_i_frag
, NULL
, 1, parse_uint
, FLAG_ALIAS
},
217 { "fsize", &set_inode
.osd2
.hurd2
.h_i_fsize
, NULL
, 1, parse_uint
},
218 { "checksum", &set_inode
.osd2
.linux2
.l_i_checksum_lo
,
219 &set_inode
.i_checksum_hi
, 2, parse_uint
},
220 { "author", &set_inode
.osd2
.hurd2
.h_i_author
, NULL
,
221 4, parse_uint
, FLAG_ALIAS
},
222 { "extra_isize", &set_inode
.i_extra_isize
, NULL
,
224 { "ctime_extra", &set_inode
.i_ctime_extra
, NULL
,
225 4, parse_uint
, FLAG_ALIAS
},
226 { "mtime_extra", &set_inode
.i_mtime_extra
, NULL
,
227 4, parse_uint
, FLAG_ALIAS
},
228 { "atime_extra", &set_inode
.i_atime_extra
, NULL
,
229 4, parse_uint
, FLAG_ALIAS
},
230 { "crtime", &set_inode
.i_crtime
, &set_inode
.i_crtime_extra
,
232 { "crtime_extra", &set_inode
.i_crtime_extra
, NULL
,
233 4, parse_uint
, FLAG_ALIAS
},
234 { "projid", &set_inode
.i_projid
, NULL
, 4, parse_uint
},
235 { "bmap", NULL
, NULL
, 4, parse_bmap
, FLAG_ARRAY
},
239 static struct field_set_info ext2_bg_fields
[] = {
240 { "block_bitmap", &set_gd
.bg_block_bitmap
, NULL
, 4, parse_uint
},
241 { "inode_bitmap", &set_gd
.bg_inode_bitmap
, NULL
, 4, parse_uint
},
242 { "inode_table", &set_gd
.bg_inode_table
, NULL
, 4, parse_uint
},
243 { "free_blocks_count", &set_gd
.bg_free_blocks_count
, NULL
, 2, parse_uint
},
244 { "free_inodes_count", &set_gd
.bg_free_inodes_count
, NULL
, 2, parse_uint
},
245 { "used_dirs_count", &set_gd
.bg_used_dirs_count
, NULL
, 2, parse_uint
},
246 { "flags", &set_gd
.bg_flags
, NULL
, 2, parse_uint
},
247 { "itable_unused", &set_gd
.bg_itable_unused
, NULL
, 2, parse_uint
},
248 { "checksum", &set_gd
.bg_checksum
, NULL
, 2, parse_gd_csum
},
252 static struct field_set_info ext4_bg_fields
[] = {
253 { "block_bitmap", &set_gd4
.bg_block_bitmap
,
254 &set_gd4
.bg_block_bitmap_hi
, 4, parse_uint
},
255 { "inode_bitmap", &set_gd4
.bg_inode_bitmap
,
256 &set_gd4
.bg_inode_bitmap_hi
, 4, parse_uint
},
257 { "inode_table", &set_gd4
.bg_inode_table
,
258 &set_gd4
.bg_inode_table_hi
, 4, parse_uint
},
259 { "free_blocks_count", &set_gd4
.bg_free_blocks_count
,
260 &set_gd4
.bg_free_blocks_count_hi
, 2, parse_uint
},
261 { "free_inodes_count", &set_gd4
.bg_free_inodes_count
,
262 &set_gd4
.bg_free_inodes_count_hi
, 2, parse_uint
},
263 { "used_dirs_count", &set_gd4
.bg_used_dirs_count
,
264 &set_gd4
.bg_used_dirs_count_hi
, 2, parse_uint
},
265 { "flags", &set_gd4
.bg_flags
, NULL
, 2, parse_uint
},
266 { "exclude_bitmap", &set_gd4
.bg_exclude_bitmap_lo
,
267 &set_gd4
.bg_exclude_bitmap_hi
, 4, parse_uint
},
268 { "block_bitmap_csum", &set_gd4
.bg_block_bitmap_csum_lo
,
269 &set_gd4
.bg_block_bitmap_csum_hi
, 2, parse_uint
},
270 { "inode_bitmap_csum", &set_gd4
.bg_inode_bitmap_csum_lo
,
271 &set_gd4
.bg_inode_bitmap_csum_hi
, 2, parse_uint
},
272 { "itable_unused", &set_gd4
.bg_itable_unused
,
273 &set_gd4
.bg_itable_unused_hi
, 2, parse_uint
},
274 { "checksum", &set_gd4
.bg_checksum
, NULL
, 2, parse_gd_csum
},
278 static struct field_set_info mmp_fields
[] = {
279 { "clear", &set_mmp
.mmp_magic
, NULL
, sizeof(set_mmp
),
280 parse_mmp_clear
, FLAG_ALIAS
},
281 { "magic", &set_mmp
.mmp_magic
, NULL
, 4, parse_uint
},
282 { "seq", &set_mmp
.mmp_seq
, NULL
, 4, parse_uint
},
283 { "time", &set_mmp
.mmp_time
, NULL
, 8, parse_uint
},
284 { "nodename", &set_mmp
.mmp_nodename
, NULL
, sizeof(set_mmp
.mmp_nodename
),
286 { "bdevname", &set_mmp
.mmp_bdevname
, NULL
, sizeof(set_mmp
.mmp_bdevname
),
288 { "check_interval", &set_mmp
.mmp_check_interval
, NULL
, 2, parse_uint
},
289 { "checksum", &set_mmp
.mmp_checksum
, NULL
, 4, parse_uint
},
292 #pragma GCC diagnostic pop
297 static void do_verify_field_set_info(struct field_set_info
*fields
,
298 const void *data
, size_t size
)
300 struct field_set_info
*ss
, *ss2
;
301 const char *begin
= (char *)data
;
302 const char *end
= begin
+ size
;
304 for (ss
= fields
; ss
->name
; ss
++) {
309 assert(!ptr
|| (ptr
>= begin
&& ptr
< end
));
311 assert(!ptr
|| (ptr
>= begin
&& ptr
< end
));
316 for (ss2
= fields
; ss2
!= ss
; ss2
++) {
317 /* Check duplicate names */
318 assert(strcmp(ss
->name
, ss2
->name
));
320 if (ss
->flags
& FLAG_ALIAS
|| ss2
->flags
& FLAG_ALIAS
)
322 /* Check false aliases, might be copy-n-paste error */
323 assert(!ss
->ptr
|| (ss
->ptr
!= ss2
->ptr
&&
324 ss
->ptr
!= ss2
->ptr2
));
325 assert(!ss
->ptr2
|| (ss
->ptr2
!= ss2
->ptr
&&
326 ss
->ptr2
!= ss2
->ptr2
));
331 int main(int argc
, char **argv
)
333 do_verify_field_set_info(super_fields
, &set_sb
, sizeof(set_sb
));
334 do_verify_field_set_info(inode_fields
, &set_inode
, sizeof(set_inode
));
335 do_verify_field_set_info(ext2_bg_fields
, &set_gd
, sizeof(set_gd
));
336 do_verify_field_set_info(ext4_bg_fields
, &set_gd4
, sizeof(set_gd4
));
337 do_verify_field_set_info(mmp_fields
, &set_mmp
, sizeof(set_mmp
));
341 ext2_filsys current_fs
;
342 ext2_ino_t root
, cwd
;
344 #endif /* UNITTEST */
346 static int check_suffix(const char *field
)
348 int len
= strlen(field
);
353 if (!strcmp(field
, "_lo"))
355 if (!strcmp(field
, "_hi"))
360 static struct field_set_info
*find_field(struct field_set_info
*fields
,
363 struct field_set_info
*ss
;
365 char *arg
, *delim
, *idx
, *tmp
;
366 int suffix
, prefix_len
;
368 if (fields
== super_fields
)
370 else if (fields
== inode_fields
)
374 prefix_len
= strlen(prefix
);
375 if (strncmp(field
, prefix
, prefix_len
) == 0)
378 arg
= malloc(strlen(field
)+1);
383 idx
= strchr(arg
, '[');
386 delim
= idx
+ strlen(idx
) - 1;
387 if (!*idx
|| *delim
!= ']')
393 * Can we parse the number?
396 array_idx
= strtol(idx
, &tmp
, 0);
405 * If there is a valid _hi or a _lo suffix, strip it off
407 suffix
= check_suffix(arg
);
409 arg
[strlen(arg
)-3] = 0;
411 for (ss
= fields
; ss
->name
; ss
++) {
412 if (suffix
&& ss
->ptr2
== 0)
414 if (ss
->flags
& FLAG_ARRAY
) {
415 if (!idx
|| (strcmp(ss
->name
, arg
) != 0))
417 if (ss
->max_idx
> 0 && array_idx
>= ss
->max_idx
)
420 if (strcmp(ss
->name
, arg
) != 0)
431 * Note: info->size == 6 is special; this means a base size 4 bytes,
432 * and secondiory (high) size of 2 bytes. This is needed for the
433 * special case of i_blocks_high and i_file_acl_high.
435 static errcode_t
parse_uint(struct field_set_info
*info
, char *field
,
438 unsigned long long n
, num
, mask
, limit
;
439 int suffix
= check_suffix(field
);
441 void *field1
= info
->ptr
, *field2
= info
->ptr2
;
442 int size
= (info
->size
== 6) ? 4 : info
->size
;
457 u
.ptr8
= (__u8
*) field1
;
458 if (info
->flags
& FLAG_ARRAY
)
459 u
.ptr8
+= array_idx
* info
->size
;
462 num
= STRTOULL(arg
, &tmp
, 0);
464 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
468 mask
= ~0ULL >> ((8 - size
) * 8);
469 limit
= ~0ULL >> ((8 - info
->size
) * 8);
470 if (field2
&& info
->size
!= 6)
471 limit
= ~0ULL >> ((8 - info
->size
*2) * 8);
474 fprintf(stderr
, "Value '%s' exceeds field %s maximum %llu.\n",
475 arg
, info
->name
, limit
);
481 /* Should never get here */
482 fprintf(stderr
, "64-bit field %s has a second 64-bit field\n"
483 "defined; BUG?!?\n", info
->name
);
499 u
.ptr8
= (__u8
*) field2
;
519 static errcode_t
parse_int(struct field_set_info
*info
,
520 char *field
EXT2FS_ATTR((unused
)), char *arg
)
528 num
= strtol(arg
, &tmp
, 0);
530 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
534 switch (info
->size
) {
536 ptr32
= (__s32
*) info
->ptr
;
540 ptr16
= (__s16
*) info
->ptr
;
544 ptr8
= (__s8
*) info
->ptr
;
551 static errcode_t
parse_string(struct field_set_info
*info
,
552 char *field
EXT2FS_ATTR((unused
)), char *arg
)
554 char *cp
= (char *) info
->ptr
;
556 if (strlen(arg
) >= info
->size
) {
557 fprintf(stderr
, "Error maximum size for %s is %d.\n",
558 info
->name
, info
->size
);
565 static errcode_t
parse_time(struct field_set_info
*info
,
566 char *field
, char *arg
)
570 __u32
*ptr_low
, *ptr_high
;
572 if (check_suffix(field
))
573 return parse_uint(info
, field
, arg
);
575 ptr_low
= (__u32
*) info
->ptr
;
576 ptr_high
= (__u32
*) info
->ptr2
;
578 t
= string_to_time(arg
);
581 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
586 t_high
= ((t
- (__s32
)t
) >> 32) & EXT4_EPOCH_MASK
;
589 *ptr_high
= (*ptr_high
& ~EXT4_EPOCH_MASK
) | t_high
;
593 static errcode_t
parse_uuid(struct field_set_info
*info
,
594 char *field
EXT2FS_ATTR((unused
)), char *arg
)
596 unsigned char * p
= (unsigned char *) info
->ptr
;
598 if ((strcasecmp(arg
, "null") == 0) ||
599 (strcasecmp(arg
, "clear") == 0)) {
601 } else if (strcasecmp(arg
, "time") == 0) {
602 uuid_generate_time(p
);
603 } else if (strcasecmp(arg
, "random") == 0) {
605 } else if (uuid_parse(arg
, p
)) {
606 fprintf(stderr
, "Invalid UUID format: %s\n", arg
);
612 static errcode_t
parse_hashalg(struct field_set_info
*info
,
613 char *field
EXT2FS_ATTR((unused
)), char *arg
)
616 unsigned char *p
= (unsigned char *) info
->ptr
;
618 hashv
= e2p_string2hash(arg
);
620 fprintf(stderr
, "Invalid hash algorithm: %s\n", arg
);
627 static errcode_t
parse_bmap(struct field_set_info
*info
,
628 char *field
EXT2FS_ATTR((unused
)), char *arg
)
634 blk
= strtoull(arg
, &tmp
, 0);
636 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
641 retval
= ext2fs_bmap2(current_fs
, set_ino
,
642 (struct ext2_inode
*) &set_inode
,
643 NULL
, BMAP_ALLOC
| BMAP_SET
, array_idx
, NULL
,
646 com_err("set_inode", retval
, "while setting block map");
651 static errcode_t
parse_gd_csum(struct field_set_info
*info
, char *field
,
654 __u16
*checksum
= info
->ptr
;
656 if (strcmp(arg
, "calc") == 0) {
657 *checksum
= ext2fs_group_desc_csum(current_fs
, set_bg
);
658 printf("Checksum set to 0x%04x\n", *checksum
);
661 return parse_uint(info
, field
, arg
);
664 static void print_possible_fields(struct field_set_info
*fields
)
666 struct field_set_info
*ss
;
667 const char *type
, *cmd
;
669 char name
[40], idx
[40];
671 if (fields
== super_fields
) {
673 cmd
= "set_super_value";
674 } else if (fields
== inode_fields
) {
677 } else if (fields
== mmp_fields
) {
679 cmd
= "set_mmp_value";
681 type
= "Block group descriptor";
682 cmd
= "set_block_group";
686 fprintf(f
, "%s fields supported by the %s command:\n", type
, cmd
);
688 for (ss
= fields
; ss
->name
; ss
++) {
690 if (ss
->func
== parse_string
)
692 else if (ss
->func
== parse_int
)
694 else if (ss
->func
== parse_uint
)
695 type
= "unsigned integer";
696 else if (ss
->func
== parse_uuid
)
698 else if (ss
->func
== parse_hashalg
)
699 type
= "hash algorithm";
700 else if (ss
->func
== parse_time
)
702 else if (ss
->func
== parse_bmap
)
703 type
= "set physical->logical block map";
704 else if (ss
->func
== parse_gd_csum
)
705 type
= "unsigned integer OR \"calc\"";
706 strcpy(name
, ss
->name
);
707 if (ss
->flags
& FLAG_ARRAY
) {
709 sprintf(idx
, "[%d]", ss
->max_idx
);
715 strcat(name
, "[_hi|_lo]");
716 fprintf(f
, "\t%-25s\t%s\n", name
, type
);
722 void do_set_super(int argc
, char *argv
[])
724 const char *usage
= "<field> <value>\n"
725 "\t\"set_super_value -l\" will list the names of "
726 "superblock fields\n\twhich can be set.";
727 static struct field_set_info
*ss
;
729 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
730 print_possible_fields(super_fields
);
734 if (common_args_process(argc
, argv
, 3, 3, "set_super_value",
738 if ((ss
= find_field(super_fields
, argv
[1])) == 0) {
739 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[1]);
742 set_sb
= *current_fs
->super
;
743 if (ss
->func(ss
, argv
[1], argv
[2]) == 0) {
744 *current_fs
->super
= set_sb
;
745 ext2fs_mark_super_dirty(current_fs
);
749 void do_set_inode(int argc
, char *argv
[])
751 const char *usage
= "<inode> <field> <value>\n"
752 "\t\"set_inode_field -l\" will list the names of "
753 "the fields in an ext2 inode\n\twhich can be set.";
754 static struct field_set_info
*ss
;
756 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
757 print_possible_fields(inode_fields
);
761 if (common_args_process(argc
, argv
, 4, 4, "set_inode",
765 if ((ss
= find_field(inode_fields
, argv
[2])) == 0) {
766 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[2]);
770 set_ino
= string_to_inode(argv
[1]);
774 if (debugfs_read_inode_full(set_ino
,
775 (struct ext2_inode
*) &set_inode
, argv
[1],
779 if (ss
->func(ss
, argv
[2], argv
[3]) == 0) {
780 if (debugfs_write_inode_full(set_ino
,
781 (struct ext2_inode
*) &set_inode
,
782 argv
[1], sizeof(set_inode
)))
787 void do_set_block_group_descriptor(int argc
, char *argv
[])
789 const char *usage
= "<bg number> <field> <value>\n"
790 "\t\"set_block_group_descriptor -l\" will list the names of "
791 "the fields in a block group descriptor\n\twhich can be set.";
792 struct field_set_info
*table
;
793 struct field_set_info
*ss
;
799 * Determine whether we are editing an ext2 or ext4 block group
800 * descriptor. Descriptors larger than ext4_group_desc cannot
801 * have their fields edited yet, because they do not have any
802 * names assigned. When that happens, this function needs to
803 * be updated for the new descriptor struct and fields.
806 EXT2_DESC_SIZE(current_fs
->super
) >= EXT2_MIN_DESC_SIZE_64BIT
) {
807 table
= ext4_bg_fields
;
809 size
= sizeof(set_gd4
);
811 table
= ext2_bg_fields
;
813 size
= sizeof(set_gd
);
816 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
817 print_possible_fields(table
);
821 if (common_args_process(argc
, argv
, 4, 4, "set_block_group_descriptor",
825 set_bg
= strtoul(argv
[1], &end
, 0);
827 com_err(argv
[0], 0, "invalid block group number: %s", argv
[1]);
831 if (set_bg
>= current_fs
->group_desc_count
) {
832 com_err(argv
[0], 0, "block group number too big: %d", set_bg
);
836 if ((ss
= find_field(table
, argv
[2])) == 0) {
837 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[2]);
841 target
= ext2fs_group_desc(current_fs
, current_fs
->group_desc
, set_bg
);
842 memcpy(edit
, target
, size
);
843 if (ss
->func(ss
, argv
[2], argv
[3]) == 0) {
844 memcpy(target
, edit
, size
);
845 ext2fs_mark_super_dirty(current_fs
);
849 static errcode_t
parse_mmp_clear(struct field_set_info
*info
,
850 char *field
EXT2FS_ATTR((unused
)),
851 char *arg
EXT2FS_ATTR((unused
)))
855 retval
= ext2fs_mmp_clear(current_fs
);
857 com_err("set_mmp_value", retval
, "while clearing MMP block\n");
859 memcpy(info
->ptr
, current_fs
->mmp_buf
, info
->size
);
861 return 1; /* we don't need the MMP block written again */
865 void do_set_mmp_value(int argc
, char *argv
[])
867 const char *usage
= "<field> <value>\n"
868 "\t\"set_mmp_value -l\" will list the names of "
869 "MMP fields\n\twhich can be set.";
870 static struct field_set_info
*smmp
;
871 struct mmp_struct
*mmp_s
;
874 if (argc
== 2 && strcmp(argv
[1], "-l") == 0) {
875 print_possible_fields(mmp_fields
);
879 if (check_fs_open(argv
[0]))
882 if (current_fs
->super
->s_mmp_block
== 0) {
883 com_err(argv
[0], 0, "no MMP block allocated\n");
887 if (common_args_process(argc
, argv
, 2, 3, "set_mmp_value",
891 mmp_s
= current_fs
->mmp_buf
;
893 retval
= ext2fs_get_mem(current_fs
->blocksize
, &mmp_s
);
895 com_err(argv
[0], retval
, "allocating MMP buffer\n");
898 retval
= ext2fs_mmp_read(current_fs
,
899 current_fs
->super
->s_mmp_block
, mmp_s
);
901 com_err(argv
[0], retval
, "reading MMP block %llu.\n",
902 (long long)current_fs
->super
->s_mmp_block
);
903 ext2fs_free_mem(&mmp_s
);
906 current_fs
->mmp_buf
= mmp_s
;
909 smmp
= find_field(mmp_fields
, argv
[1]);
911 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[1]);
916 if (smmp
->func(smmp
, argv
[1], argv
[2]) == 0) {
917 ext2fs_mmp_write(current_fs
, current_fs
->super
->s_mmp_block
,
923 void do_set_mmp_value(int argc
EXT2FS_ATTR((unused
)),
924 char *argv
[] EXT2FS_ATTR((unused
)))
926 fprintf(stdout
, "MMP is unsupported, please recompile with "