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>
40 #include "uuid/uuid.h"
43 static struct ext2_super_block set_sb
;
44 static struct ext2_inode_large set_inode
;
45 static struct ext2_group_desc set_gd
;
46 static struct ext4_group_desc set_gd4
;
47 static struct mmp_struct set_mmp
;
49 static ext2_ino_t set_ino
;
52 #define FLAG_ARRAY 0x0001
54 struct field_set_info
{
59 errcode_t (*func
)(struct field_set_info
*info
, char *field
, char *arg
);
64 static errcode_t
parse_uint(struct field_set_info
*info
, char *field
, char *arg
);
65 static errcode_t
parse_int(struct field_set_info
*info
, char *field
, char *arg
);
66 static errcode_t
parse_string(struct field_set_info
*info
, char *field
, char *arg
);
67 static errcode_t
parse_uuid(struct field_set_info
*info
, char *field
, char *arg
);
68 static errcode_t
parse_hashalg(struct field_set_info
*info
, char *field
, char *arg
);
69 static errcode_t
parse_time(struct field_set_info
*info
, char *field
, char *arg
);
70 static errcode_t
parse_bmap(struct field_set_info
*info
, char *field
, char *arg
);
71 static errcode_t
parse_gd_csum(struct field_set_info
*info
, char *field
, char *arg
);
72 static errcode_t
parse_mmp_clear(struct field_set_info
*info
, char *field
,
75 static struct field_set_info super_fields
[] = {
76 { "inodes_count", &set_sb
.s_inodes_count
, NULL
, 4, parse_uint
},
77 { "blocks_count", &set_sb
.s_blocks_count
, &set_sb
.s_blocks_count_hi
,
79 { "r_blocks_count", &set_sb
.s_r_blocks_count
,
80 &set_sb
.s_r_blocks_count_hi
, 4, parse_uint
},
81 { "free_blocks_count", &set_sb
.s_free_blocks_count
,
82 &set_sb
.s_free_blocks_hi
, 4, parse_uint
},
83 { "free_inodes_count", &set_sb
.s_free_inodes_count
, NULL
, 4, parse_uint
},
84 { "first_data_block", &set_sb
.s_first_data_block
, NULL
, 4, parse_uint
},
85 { "log_block_size", &set_sb
.s_log_block_size
, NULL
, 4, parse_uint
},
86 { "log_cluster_size", &set_sb
.s_log_cluster_size
, NULL
, 4, parse_int
},
87 { "blocks_per_group", &set_sb
.s_blocks_per_group
, NULL
, 4, parse_uint
},
88 { "clusters_per_group", &set_sb
.s_clusters_per_group
, NULL
, 4, parse_uint
},
89 { "inodes_per_group", &set_sb
.s_inodes_per_group
, NULL
, 4, parse_uint
},
90 { "mtime", &set_sb
.s_mtime
, NULL
, 4, parse_time
},
91 { "wtime", &set_sb
.s_wtime
, NULL
, 4, parse_time
},
92 { "mnt_count", &set_sb
.s_mnt_count
, NULL
, 2, parse_uint
},
93 { "max_mnt_count", &set_sb
.s_max_mnt_count
, NULL
, 2, parse_int
},
95 { "state", &set_sb
.s_state
, NULL
, 2, parse_uint
},
96 { "errors", &set_sb
.s_errors
, NULL
, 2, parse_uint
},
97 { "minor_rev_level", &set_sb
.s_minor_rev_level
, NULL
, 2, parse_uint
},
98 { "lastcheck", &set_sb
.s_lastcheck
, NULL
, 4, parse_time
},
99 { "checkinterval", &set_sb
.s_checkinterval
, NULL
, 4, parse_uint
},
100 { "creator_os", &set_sb
.s_creator_os
, NULL
, 4, parse_uint
},
101 { "rev_level", &set_sb
.s_rev_level
, NULL
, 4, parse_uint
},
102 { "def_resuid", &set_sb
.s_def_resuid
, NULL
, 2, parse_uint
},
103 { "def_resgid", &set_sb
.s_def_resgid
, NULL
, 2, parse_uint
},
104 { "first_ino", &set_sb
.s_first_ino
, NULL
, 4, parse_uint
},
105 { "inode_size", &set_sb
.s_inode_size
, NULL
, 2, parse_uint
},
106 { "block_group_nr", &set_sb
.s_block_group_nr
, NULL
, 2, parse_uint
},
107 { "feature_compat", &set_sb
.s_feature_compat
, NULL
, 4, parse_uint
},
108 { "feature_incompat", &set_sb
.s_feature_incompat
, NULL
, 4, parse_uint
},
109 { "feature_ro_compat", &set_sb
.s_feature_ro_compat
, NULL
, 4, parse_uint
},
110 { "uuid", &set_sb
.s_uuid
, NULL
, 16, parse_uuid
},
111 { "volume_name", &set_sb
.s_volume_name
, NULL
, 16, parse_string
},
112 { "last_mounted", &set_sb
.s_last_mounted
, NULL
, 64, parse_string
},
113 { "lastcheck", &set_sb
.s_lastcheck
, NULL
, 4, parse_uint
},
114 { "algorithm_usage_bitmap", &set_sb
.s_algorithm_usage_bitmap
, NULL
,
116 { "prealloc_blocks", &set_sb
.s_prealloc_blocks
, NULL
, 1, parse_uint
},
117 { "prealloc_dir_blocks", &set_sb
.s_prealloc_dir_blocks
, NULL
, 1,
119 { "reserved_gdt_blocks", &set_sb
.s_reserved_gdt_blocks
, NULL
, 2,
121 { "journal_uuid", &set_sb
.s_journal_uuid
, NULL
, 16, parse_uuid
},
122 { "journal_inum", &set_sb
.s_journal_inum
, NULL
, 4, parse_uint
},
123 { "journal_dev", &set_sb
.s_journal_dev
, NULL
, 4, parse_uint
},
124 { "last_orphan", &set_sb
.s_last_orphan
, NULL
, 4, parse_uint
},
125 { "hash_seed", &set_sb
.s_hash_seed
, NULL
, 16, parse_uuid
},
126 { "def_hash_version", &set_sb
.s_def_hash_version
, NULL
, 1, parse_hashalg
},
127 { "jnl_backup_type", &set_sb
.s_jnl_backup_type
, NULL
, 1, parse_uint
},
128 { "desc_size", &set_sb
.s_desc_size
, NULL
, 2, parse_uint
},
129 { "default_mount_opts", &set_sb
.s_default_mount_opts
, NULL
, 4, parse_uint
},
130 { "first_meta_bg", &set_sb
.s_first_meta_bg
, NULL
, 4, parse_uint
},
131 { "mkfs_time", &set_sb
.s_mkfs_time
, NULL
, 4, parse_time
},
132 { "jnl_blocks", &set_sb
.s_jnl_blocks
[0], NULL
, 4, parse_uint
, FLAG_ARRAY
,
134 { "min_extra_isize", &set_sb
.s_min_extra_isize
, NULL
, 2, parse_uint
},
135 { "want_extra_isize", &set_sb
.s_want_extra_isize
, NULL
, 2, parse_uint
},
136 { "flags", &set_sb
.s_flags
, NULL
, 4, parse_uint
},
137 { "raid_stride", &set_sb
.s_raid_stride
, NULL
, 2, parse_uint
},
138 { "min_extra_isize", &set_sb
.s_min_extra_isize
, NULL
, 4, parse_uint
},
139 { "mmp_interval", &set_sb
.s_mmp_update_interval
, NULL
, 2, parse_uint
},
140 { "mmp_block", &set_sb
.s_mmp_block
, NULL
, 8, parse_uint
},
141 { "raid_stripe_width", &set_sb
.s_raid_stripe_width
, NULL
, 4, parse_uint
},
142 { "log_groups_per_flex", &set_sb
.s_log_groups_per_flex
, NULL
, 1, parse_uint
},
143 { "kbytes_written", &set_sb
.s_kbytes_written
, NULL
, 8, parse_uint
},
144 { "snapshot_inum", &set_sb
.s_snapshot_inum
, NULL
, 4, parse_uint
},
145 { "snapshot_id", &set_sb
.s_snapshot_id
, NULL
, 4, parse_uint
},
146 { "snapshot_r_blocks_count", &set_sb
.s_snapshot_r_blocks_count
,
147 NULL
, 8, parse_uint
},
148 { "snapshot_list", &set_sb
.s_snapshot_list
, NULL
, 4, parse_uint
},
149 { "mount_opts", &set_sb
.s_mount_opts
, NULL
, 64, parse_string
},
150 { "usr_quota_inum", &set_sb
.s_usr_quota_inum
, NULL
, 4, parse_uint
},
151 { "grp_quota_inum", &set_sb
.s_grp_quota_inum
, NULL
, 4, parse_uint
},
152 { "overhead_blocks", &set_sb
.s_overhead_blocks
, NULL
, 4, parse_uint
},
153 { "backup_bgs", &set_sb
.s_backup_bgs
[0], NULL
, 4, parse_uint
,
155 { "checksum", &set_sb
.s_checksum
, NULL
, 4, parse_uint
},
156 { "checksum_type", &set_sb
.s_checksum_type
, NULL
, 1, parse_uint
},
160 static struct field_set_info inode_fields
[] = {
161 { "inodes_count", &set_sb
.s_inodes_count
, NULL
, 4, parse_uint
},
162 { "mode", &set_inode
.i_mode
, NULL
, 2, parse_uint
},
163 { "uid", &set_inode
.i_uid
, &set_inode
.osd2
.linux2
.l_i_uid_high
,
165 { "size", &set_inode
.i_size
, &set_inode
.i_size_high
, 4, parse_uint
},
166 { "atime", &set_inode
.i_atime
, NULL
, 4, parse_time
},
167 { "ctime", &set_inode
.i_ctime
, NULL
, 4, parse_time
},
168 { "mtime", &set_inode
.i_mtime
, NULL
, 4, parse_time
},
169 { "dtime", &set_inode
.i_dtime
, NULL
, 4, parse_time
},
170 { "gid", &set_inode
.i_gid
, &set_inode
.osd2
.linux2
.l_i_gid_high
,
172 { "links_count", &set_inode
.i_links_count
, NULL
, 2, parse_uint
},
173 /* Special case: i_blocks is 4 bytes, i_blocks_high is 2 bytes */
174 { "blocks", &set_inode
.i_blocks
, &set_inode
.osd2
.linux2
.l_i_blocks_hi
,
176 { "flags", &set_inode
.i_flags
, NULL
, 4, parse_uint
},
177 { "version", &set_inode
.osd1
.linux1
.l_i_version
,
178 &set_inode
.i_version_hi
, 4, parse_uint
},
179 { "translator", &set_inode
.osd1
.hurd1
.h_i_translator
, NULL
, 4, parse_uint
},
180 { "block", &set_inode
.i_block
[0], NULL
, 4, parse_uint
, FLAG_ARRAY
,
182 { "block[IND]", &set_inode
.i_block
[EXT2_IND_BLOCK
], NULL
, 4, parse_uint
},
183 { "block[DIND]", &set_inode
.i_block
[EXT2_DIND_BLOCK
], NULL
, 4, parse_uint
},
184 { "block[TIND]", &set_inode
.i_block
[EXT2_TIND_BLOCK
], NULL
, 4, parse_uint
},
185 { "generation", &set_inode
.i_generation
, NULL
, 4, parse_uint
},
186 /* Special case: i_file_acl_high is 2 bytes */
187 { "file_acl", &set_inode
.i_file_acl
,
188 &set_inode
.osd2
.linux2
.l_i_file_acl_high
, 6, parse_uint
},
189 { "dir_acl", &set_inode
.i_dir_acl
, NULL
, 4, parse_uint
},
190 { "faddr", &set_inode
.i_faddr
, NULL
, 4, parse_uint
},
191 { "frag", &set_inode
.osd2
.hurd2
.h_i_frag
, NULL
, 1, parse_uint
},
192 { "fsize", &set_inode
.osd2
.hurd2
.h_i_fsize
, NULL
, 1, parse_uint
},
193 { "checksum", &set_inode
.osd2
.linux2
.l_i_checksum_lo
,
194 &set_inode
.i_checksum_hi
, 2, parse_uint
},
195 { "author", &set_inode
.osd2
.hurd2
.h_i_author
, NULL
,
197 { "extra_isize", &set_inode
.i_extra_isize
, NULL
,
199 { "ctime_extra", &set_inode
.i_ctime_extra
, NULL
,
201 { "mtime_extra", &set_inode
.i_mtime_extra
, NULL
,
203 { "atime_extra", &set_inode
.i_atime_extra
, NULL
,
205 { "crtime", &set_inode
.i_crtime
, NULL
, 4, parse_uint
},
206 { "crtime_extra", &set_inode
.i_crtime_extra
, NULL
,
208 { "bmap", NULL
, NULL
, 4, parse_bmap
, FLAG_ARRAY
},
212 static struct field_set_info ext2_bg_fields
[] = {
213 { "block_bitmap", &set_gd
.bg_block_bitmap
, NULL
, 4, parse_uint
},
214 { "inode_bitmap", &set_gd
.bg_inode_bitmap
, NULL
, 4, parse_uint
},
215 { "inode_table", &set_gd
.bg_inode_table
, NULL
, 4, parse_uint
},
216 { "free_blocks_count", &set_gd
.bg_free_blocks_count
, NULL
, 2, parse_uint
},
217 { "free_inodes_count", &set_gd
.bg_free_inodes_count
, NULL
, 2, parse_uint
},
218 { "used_dirs_count", &set_gd
.bg_used_dirs_count
, NULL
, 2, parse_uint
},
219 { "flags", &set_gd
.bg_flags
, NULL
, 2, parse_uint
},
220 { "itable_unused", &set_gd
.bg_itable_unused
, NULL
, 2, parse_uint
},
221 { "checksum", &set_gd
.bg_checksum
, NULL
, 2, parse_gd_csum
},
225 static struct field_set_info ext4_bg_fields
[] = {
226 { "block_bitmap", &set_gd4
.bg_block_bitmap
,
227 &set_gd4
.bg_block_bitmap_hi
, 4, parse_uint
},
228 { "inode_bitmap", &set_gd4
.bg_inode_bitmap
,
229 &set_gd4
.bg_inode_bitmap_hi
, 4, parse_uint
},
230 { "inode_table", &set_gd4
.bg_inode_table
,
231 &set_gd4
.bg_inode_table_hi
, 4, parse_uint
},
232 { "free_blocks_count", &set_gd4
.bg_free_blocks_count
,
233 &set_gd4
.bg_free_blocks_count_hi
, 2, parse_uint
},
234 { "free_inodes_count", &set_gd4
.bg_free_inodes_count
,
235 &set_gd4
.bg_free_inodes_count_hi
, 2, parse_uint
},
236 { "used_dirs_count", &set_gd4
.bg_used_dirs_count
,
237 &set_gd4
.bg_used_dirs_count_hi
, 2, parse_uint
},
238 { "flags", &set_gd4
.bg_flags
, NULL
, 2, parse_uint
},
239 { "exclude_bitmap", &set_gd4
.bg_exclude_bitmap_lo
,
240 &set_gd4
.bg_exclude_bitmap_hi
, 4, parse_uint
},
241 { "block_bitmap_csum", &set_gd4
.bg_block_bitmap_csum_lo
,
242 &set_gd4
.bg_block_bitmap_csum_hi
, 2, parse_uint
},
243 { "inode_bitmap_csum", &set_gd4
.bg_inode_bitmap_csum_lo
,
244 &set_gd4
.bg_inode_bitmap_csum_hi
, 2, parse_uint
},
245 { "itable_unused", &set_gd4
.bg_itable_unused
,
246 &set_gd4
.bg_itable_unused_hi
, 2, parse_uint
},
247 { "checksum", &set_gd4
.bg_checksum
, NULL
, 2, parse_gd_csum
},
251 static struct field_set_info mmp_fields
[] = {
252 { "clear", &set_mmp
.mmp_magic
, NULL
, sizeof(set_mmp
), parse_mmp_clear
},
253 { "magic", &set_mmp
.mmp_magic
, NULL
, 4, parse_uint
},
254 { "seq", &set_mmp
.mmp_seq
, NULL
, 4, parse_uint
},
255 { "time", &set_mmp
.mmp_time
, NULL
, 8, parse_uint
},
256 { "nodename", &set_mmp
.mmp_nodename
, NULL
, sizeof(set_mmp
.mmp_nodename
),
258 { "bdevname", &set_mmp
.mmp_bdevname
, NULL
, sizeof(set_mmp
.mmp_bdevname
),
260 { "check_interval", &set_mmp
.mmp_check_interval
, NULL
, 2, parse_uint
},
261 { "checksum", &set_mmp
.mmp_checksum
, NULL
, 4, parse_uint
},
264 static int check_suffix(const char *field
)
266 int len
= strlen(field
);
271 if (!strcmp(field
, "_lo"))
273 if (!strcmp(field
, "_hi"))
278 static struct field_set_info
*find_field(struct field_set_info
*fields
,
281 struct field_set_info
*ss
;
283 char *arg
, *delim
, *idx
, *tmp
;
284 int suffix
, prefix_len
;
286 if (fields
== super_fields
)
288 else if (fields
== inode_fields
)
292 prefix_len
= strlen(prefix
);
293 if (strncmp(field
, prefix
, prefix_len
) == 0)
296 arg
= malloc(strlen(field
)+1);
301 idx
= strchr(arg
, '[');
304 delim
= idx
+ strlen(idx
) - 1;
305 if (!*idx
|| *delim
!= ']')
311 * Can we parse the number?
314 array_idx
= strtol(idx
, &tmp
, 0);
320 * If there is a valid _hi or a _lo suffix, strip it off
322 suffix
= check_suffix(arg
);
324 arg
[strlen(arg
)-3] = 0;
326 for (ss
= fields
; ss
->name
; ss
++) {
327 if (suffix
&& ss
->ptr2
== 0)
329 if (ss
->flags
& FLAG_ARRAY
) {
330 if (!idx
|| (strcmp(ss
->name
, arg
) != 0))
332 if (ss
->max_idx
> 0 && array_idx
>= ss
->max_idx
)
335 if (strcmp(ss
->name
, arg
) != 0)
346 * Note: info->size == 6 is special; this means a base size 4 bytes,
347 * and secondiory (high) size of 2 bytes. This is needed for the
348 * special case of i_blocks_high and i_file_acl_high.
350 static errcode_t
parse_uint(struct field_set_info
*info
, char *field
,
353 unsigned long long n
, num
, mask
, limit
;
354 int suffix
= check_suffix(field
);
356 void *field1
= info
->ptr
, *field2
= info
->ptr2
;
357 int size
= (info
->size
== 6) ? 4 : info
->size
;
372 u
.ptr8
= (__u8
*) field1
;
373 if (info
->flags
& FLAG_ARRAY
)
374 u
.ptr8
+= array_idx
* info
->size
;
377 num
= STRTOULL(arg
, &tmp
, 0);
379 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
383 mask
= ~0ULL >> ((8 - size
) * 8);
384 limit
= ~0ULL >> ((8 - info
->size
) * 8);
385 if (field2
&& info
->size
!= 6)
386 limit
= ~0ULL >> ((8 - info
->size
*2) * 8);
389 fprintf(stderr
, "Value '%s' exceeds field %s maximum %llu.\n",
390 arg
, info
->name
, limit
);
396 /* Should never get here */
397 fprintf(stderr
, "64-bit field %s has a second 64-bit field\n"
398 "defined; BUG?!?\n", info
->name
);
414 u
.ptr8
= (__u8
*) field2
;
434 static errcode_t
parse_int(struct field_set_info
*info
,
435 char *field
EXT2FS_ATTR((unused
)), char *arg
)
443 num
= strtol(arg
, &tmp
, 0);
445 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
449 switch (info
->size
) {
451 ptr32
= (__s32
*) info
->ptr
;
455 ptr16
= (__s16
*) info
->ptr
;
459 ptr8
= (__s8
*) info
->ptr
;
466 static errcode_t
parse_string(struct field_set_info
*info
,
467 char *field
EXT2FS_ATTR((unused
)), char *arg
)
469 char *cp
= (char *) info
->ptr
;
471 if (strlen(arg
) >= info
->size
) {
472 fprintf(stderr
, "Error maximum size for %s is %d.\n",
473 info
->name
, info
->size
);
480 static errcode_t
parse_time(struct field_set_info
*info
,
481 char *field
EXT2FS_ATTR((unused
)), char *arg
)
486 ptr32
= (__u32
*) info
->ptr
;
488 t
= string_to_time(arg
);
490 if (t
== ((time_t) -1)) {
491 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
499 static errcode_t
parse_uuid(struct field_set_info
*info
,
500 char *field
EXT2FS_ATTR((unused
)), char *arg
)
502 unsigned char * p
= (unsigned char *) info
->ptr
;
504 if ((strcasecmp(arg
, "null") == 0) ||
505 (strcasecmp(arg
, "clear") == 0)) {
507 } else if (strcasecmp(arg
, "time") == 0) {
508 uuid_generate_time(p
);
509 } else if (strcasecmp(arg
, "random") == 0) {
511 } else if (uuid_parse(arg
, p
)) {
512 fprintf(stderr
, "Invalid UUID format: %s\n", arg
);
518 static errcode_t
parse_hashalg(struct field_set_info
*info
,
519 char *field
EXT2FS_ATTR((unused
)), char *arg
)
522 unsigned char *p
= (unsigned char *) info
->ptr
;
524 hashv
= e2p_string2hash(arg
);
526 fprintf(stderr
, "Invalid hash algorithm: %s\n", arg
);
533 static errcode_t
parse_bmap(struct field_set_info
*info
,
534 char *field
EXT2FS_ATTR((unused
)), char *arg
)
540 blk
= strtoull(arg
, &tmp
, 0);
542 fprintf(stderr
, "Couldn't parse '%s' for field %s.\n",
547 retval
= ext2fs_bmap2(current_fs
, set_ino
,
548 (struct ext2_inode
*) &set_inode
,
549 NULL
, BMAP_SET
, array_idx
, NULL
, &blk
);
551 com_err("set_inode", retval
, "while setting block map");
556 static errcode_t
parse_gd_csum(struct field_set_info
*info
, char *field
,
560 if (strcmp(arg
, "calc") == 0) {
561 ext2fs_group_desc_csum_set(current_fs
, set_bg
);
562 memcpy(&set_gd
, ext2fs_group_desc(current_fs
,
563 current_fs
->group_desc
,
566 printf("Checksum set to 0x%04x\n",
567 ext2fs_bg_checksum(current_fs
, set_bg
));
571 return parse_uint(info
, field
, arg
);
574 static void print_possible_fields(struct field_set_info
*fields
)
576 struct field_set_info
*ss
;
577 const char *type
, *cmd
;
579 char name
[40], idx
[40];
581 if (fields
== super_fields
) {
583 cmd
= "set_super_value";
584 } else if (fields
== inode_fields
) {
587 } else if (fields
== mmp_fields
) {
589 cmd
= "set_mmp_value";
591 type
= "Block group descriptor";
592 cmd
= "set_block_group";
596 fprintf(f
, "%s fields supported by the %s command:\n", type
, cmd
);
598 for (ss
= fields
; ss
->name
; ss
++) {
600 if (ss
->func
== parse_string
)
602 else if (ss
->func
== parse_int
)
604 else if (ss
->func
== parse_uint
)
605 type
= "unsigned integer";
606 else if (ss
->func
== parse_uuid
)
608 else if (ss
->func
== parse_hashalg
)
609 type
= "hash algorithm";
610 else if (ss
->func
== parse_time
)
612 else if (ss
->func
== parse_bmap
)
613 type
= "set physical->logical block map";
614 else if (ss
->func
== parse_gd_csum
)
615 type
= "unsigned integer OR \"calc\"";
616 strcpy(name
, ss
->name
);
617 if (ss
->flags
& FLAG_ARRAY
) {
619 sprintf(idx
, "[%d]", ss
->max_idx
);
625 strcat(name
, "[_hi|_lo]");
626 fprintf(f
, "\t%-25s\t%s\n", name
, type
);
632 void do_set_super(int argc
, char *argv
[])
634 const char *usage
= "<field> <value>\n"
635 "\t\"set_super_value -l\" will list the names of "
636 "superblock fields\n\twhich can be set.";
637 static struct field_set_info
*ss
;
639 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
640 print_possible_fields(super_fields
);
644 if (common_args_process(argc
, argv
, 3, 3, "set_super_value",
648 if ((ss
= find_field(super_fields
, argv
[1])) == 0) {
649 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[1]);
652 set_sb
= *current_fs
->super
;
653 if (ss
->func(ss
, argv
[1], argv
[2]) == 0) {
654 *current_fs
->super
= set_sb
;
655 ext2fs_mark_super_dirty(current_fs
);
659 void do_set_inode(int argc
, char *argv
[])
661 const char *usage
= "<inode> <field> <value>\n"
662 "\t\"set_inode_field -l\" will list the names of "
663 "the fields in an ext2 inode\n\twhich can be set.";
664 static struct field_set_info
*ss
;
666 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
667 print_possible_fields(inode_fields
);
671 if (common_args_process(argc
, argv
, 4, 4, "set_inode",
675 if ((ss
= find_field(inode_fields
, argv
[2])) == 0) {
676 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[2]);
680 set_ino
= string_to_inode(argv
[1]);
684 if (debugfs_read_inode_full(set_ino
,
685 (struct ext2_inode
*) &set_inode
, argv
[1],
689 if (ss
->func(ss
, argv
[2], argv
[3]) == 0) {
690 if (debugfs_write_inode_full(set_ino
,
691 (struct ext2_inode
*) &set_inode
,
692 argv
[1], sizeof(set_inode
)))
697 void do_set_block_group_descriptor(int argc
, char *argv
[])
699 const char *usage
= "<bg number> <field> <value>\n"
700 "\t\"set_block_group_descriptor -l\" will list the names of "
701 "the fields in a block group descriptor\n\twhich can be set.";
702 struct field_set_info
*table
;
703 struct field_set_info
*ss
;
709 * Determine whether we are editing an ext2 or ext4 block group
710 * descriptor. Descriptors larger than ext4_group_desc cannot
711 * have their fields edited yet, because they do not have any
712 * names assigned. When that happens, this function needs to
713 * be updated for the new descriptor struct and fields.
716 EXT2_DESC_SIZE(current_fs
->super
) >= EXT2_MIN_DESC_SIZE_64BIT
) {
717 table
= ext4_bg_fields
;
719 size
= sizeof(set_gd4
);
721 table
= ext2_bg_fields
;
723 size
= sizeof(set_gd
);
726 if ((argc
== 2) && !strcmp(argv
[1], "-l")) {
727 print_possible_fields(table
);
731 if (common_args_process(argc
, argv
, 4, 4, "set_block_group_descriptor",
735 set_bg
= strtoul(argv
[1], &end
, 0);
737 com_err(argv
[0], 0, "invalid block group number: %s", argv
[1]);
741 if (set_bg
>= current_fs
->group_desc_count
) {
742 com_err(argv
[0], 0, "block group number too big: %d", set_bg
);
746 if ((ss
= find_field(table
, argv
[2])) == 0) {
747 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[2]);
751 target
= ext2fs_group_desc(current_fs
, current_fs
->group_desc
, set_bg
);
752 memcpy(edit
, target
, size
);
753 if (ss
->func(ss
, argv
[2], argv
[3]) == 0) {
754 memcpy(target
, edit
, size
);
755 ext2fs_mark_super_dirty(current_fs
);
759 static errcode_t
parse_mmp_clear(struct field_set_info
*info
,
760 char *field
EXT2FS_ATTR((unused
)),
761 char *arg
EXT2FS_ATTR((unused
)))
765 retval
= ext2fs_mmp_clear(current_fs
);
767 com_err("set_mmp_value", retval
, "while clearing MMP block\n");
769 memcpy(info
->ptr
, current_fs
->mmp_buf
, info
->size
);
771 return 1; /* we don't need the MMP block written again */
774 void do_set_mmp_value(int argc
, char *argv
[])
777 const char *usage
= "<field> <value>\n"
778 "\t\"set_mmp_value -l\" will list the names of "
779 "MMP fields\n\twhich can be set.";
780 static struct field_set_info
*smmp
;
781 struct mmp_struct
*mmp_s
;
784 if (argc
== 2 && strcmp(argv
[1], "-l") == 0) {
785 print_possible_fields(mmp_fields
);
789 if (check_fs_open(argv
[0]))
792 if (current_fs
->super
->s_mmp_block
== 0) {
793 com_err(argv
[0], 0, "no MMP block allocated\n");
797 if (common_args_process(argc
, argv
, 2, 3, "set_mmp_value",
801 mmp_s
= current_fs
->mmp_buf
;
803 retval
= ext2fs_get_mem(current_fs
->blocksize
, &mmp_s
);
805 com_err(argv
[0], retval
, "allocating MMP buffer\n");
808 retval
= ext2fs_mmp_read(current_fs
,
809 current_fs
->super
->s_mmp_block
, mmp_s
);
811 com_err(argv
[0], retval
, "reading MMP block %llu.\n",
812 (long long)current_fs
->super
->s_mmp_block
);
813 ext2fs_free_mem(&mmp_s
);
816 current_fs
->mmp_buf
= mmp_s
;
819 smmp
= find_field(mmp_fields
, argv
[1]);
821 com_err(argv
[0], 0, "invalid field specifier: %s", argv
[1]);
826 if (smmp
->func(smmp
, argv
[1], argv
[2]) == 0) {
827 ext2fs_mmp_write(current_fs
, current_fs
->super
->s_mmp_block
,
832 fprintf(stdout
, "MMP is unsupported, please recompile with "