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"
44 static struct ext2_super_block set_sb;
45 static struct ext2_inode_large set_inode;
46 static struct ext2_group_desc set_gd;
47 static struct ext4_group_desc set_gd4;
48 static struct mmp_struct set_mmp;
50 static ext2_ino_t set_ino;
53 #define FLAG_ARRAY 0x0001
54 #define FLAG_ALIAS 0x0002 /* Data intersects with other field */
56 struct field_set_info {
61 errcode_t (*func)(struct field_set_info *info, char *field, char *arg);
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);
74 static errcode_t parse_mmp_clear(struct field_set_info *info, char *field,
77 #pragma GCC diagnostic push
78 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
80 static struct field_set_info super_fields[] = {
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,
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 },
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 },
118 { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap, NULL,
120 { "prealloc_blocks", &set_sb.s_prealloc_blocks, NULL, 1, parse_uint },
121 { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, NULL, 1,
123 { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, NULL, 2,
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,
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 },
142 { "mmp_interval", &set_sb.s_mmp_update_interval, NULL, 2, parse_uint },
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 },
156 { "backup_bgs", &set_sb.s_backup_bgs[0], NULL, 4, parse_uint,
158 { "checksum", &set_sb.s_checksum, NULL, 4, parse_uint },
159 { "checksum_type", &set_sb.s_checksum_type, NULL, 1, parse_uint },
160 { "encryption_level", &set_sb.s_encryption_level, NULL, 1, parse_uint },
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 },
166 { "first_error_line", &set_sb.s_first_error_line, NULL, 4, parse_uint },
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 },
171 { "last_error_line", &set_sb.s_last_error_line, NULL, 4, parse_uint },
172 { "encrypt_algos", &set_sb.s_encrypt_algos, NULL, 1, parse_uint,
174 { "encrypt_pw_salt", &set_sb.s_encrypt_pw_salt, NULL, 16, parse_uuid },
175 { "lpf_ino", &set_sb.s_lpf_ino, NULL, 4, parse_uint },
179 static struct field_set_info inode_fields[] = {
180 { "mode", &set_inode.i_mode, NULL, 2, parse_uint },
181 { "uid", &set_inode.i_uid, &set_inode.osd2.linux2.l_i_uid_high,
183 { "size", &set_inode.i_size, &set_inode.i_size_high, 4, parse_uint },
184 { "atime", &set_inode.i_atime, &set_inode.i_atime_extra,
186 { "ctime", &set_inode.i_ctime, &set_inode.i_ctime_extra,
188 { "mtime", &set_inode.i_mtime, &set_inode.i_mtime_extra,
190 { "dtime", &set_inode.i_dtime, NULL,
192 { "gid", &set_inode.i_gid, &set_inode.osd2.linux2.l_i_gid_high,
194 { "links_count", &set_inode.i_links_count, NULL, 2, parse_uint },
195 /* Special case: i_blocks is 4 bytes, i_blocks_high is 2 bytes */
196 { "blocks", &set_inode.i_blocks, &set_inode.osd2.linux2.l_i_blocks_hi,
198 { "flags", &set_inode.i_flags, NULL, 4, parse_uint },
199 { "version", &set_inode.osd1.linux1.l_i_version,
200 &set_inode.i_version_hi, 4, parse_uint },
201 { "translator", &set_inode.osd1.hurd1.h_i_translator, NULL,
202 4, parse_uint, FLAG_ALIAS },
203 { "block", &set_inode.i_block[0], NULL, 4, parse_uint, FLAG_ARRAY,
205 { "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], NULL, 4, parse_uint },
206 { "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], NULL, 4, parse_uint },
207 { "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], NULL, 4, parse_uint },
208 { "generation", &set_inode.i_generation, NULL, 4, parse_uint },
209 /* Special case: i_file_acl_high is 2 bytes */
210 { "file_acl", &set_inode.i_file_acl,
211 &set_inode.osd2.linux2.l_i_file_acl_high, 6, parse_uint },
212 { "dir_acl", &set_inode.i_dir_acl, NULL, 4, parse_uint, FLAG_ALIAS },
213 { "faddr", &set_inode.i_faddr, NULL, 4, parse_uint },
214 { "frag", &set_inode.osd2.hurd2.h_i_frag, NULL, 1, parse_uint, FLAG_ALIAS },
215 { "fsize", &set_inode.osd2.hurd2.h_i_fsize, NULL, 1, parse_uint },
216 { "checksum", &set_inode.osd2.linux2.l_i_checksum_lo,
217 &set_inode.i_checksum_hi, 2, parse_uint },
218 { "author", &set_inode.osd2.hurd2.h_i_author, NULL,
219 4, parse_uint, FLAG_ALIAS },
220 { "extra_isize", &set_inode.i_extra_isize, NULL,
222 { "ctime_extra", &set_inode.i_ctime_extra, NULL,
223 4, parse_uint, FLAG_ALIAS },
224 { "mtime_extra", &set_inode.i_mtime_extra, NULL,
225 4, parse_uint, FLAG_ALIAS },
226 { "atime_extra", &set_inode.i_atime_extra, NULL,
227 4, parse_uint, FLAG_ALIAS },
228 { "crtime", &set_inode.i_crtime, &set_inode.i_crtime_extra,
230 { "crtime_extra", &set_inode.i_crtime_extra, NULL,
231 4, parse_uint, FLAG_ALIAS },
232 { "bmap", NULL, NULL, 4, parse_bmap, FLAG_ARRAY },
236 static struct field_set_info ext2_bg_fields[] = {
237 { "block_bitmap", &set_gd.bg_block_bitmap, NULL, 4, parse_uint },
238 { "inode_bitmap", &set_gd.bg_inode_bitmap, NULL, 4, parse_uint },
239 { "inode_table", &set_gd.bg_inode_table, NULL, 4, parse_uint },
240 { "free_blocks_count", &set_gd.bg_free_blocks_count, NULL, 2, parse_uint },
241 { "free_inodes_count", &set_gd.bg_free_inodes_count, NULL, 2, parse_uint },
242 { "used_dirs_count", &set_gd.bg_used_dirs_count, NULL, 2, parse_uint },
243 { "flags", &set_gd.bg_flags, NULL, 2, parse_uint },
244 { "itable_unused", &set_gd.bg_itable_unused, NULL, 2, parse_uint },
245 { "checksum", &set_gd.bg_checksum, NULL, 2, parse_gd_csum },
249 static struct field_set_info ext4_bg_fields[] = {
250 { "block_bitmap", &set_gd4.bg_block_bitmap,
251 &set_gd4.bg_block_bitmap_hi, 4, parse_uint },
252 { "inode_bitmap", &set_gd4.bg_inode_bitmap,
253 &set_gd4.bg_inode_bitmap_hi, 4, parse_uint },
254 { "inode_table", &set_gd4.bg_inode_table,
255 &set_gd4.bg_inode_table_hi, 4, parse_uint },
256 { "free_blocks_count", &set_gd4.bg_free_blocks_count,
257 &set_gd4.bg_free_blocks_count_hi, 2, parse_uint },
258 { "free_inodes_count", &set_gd4.bg_free_inodes_count,
259 &set_gd4.bg_free_inodes_count_hi, 2, parse_uint },
260 { "used_dirs_count", &set_gd4.bg_used_dirs_count,
261 &set_gd4.bg_used_dirs_count_hi, 2, parse_uint },
262 { "flags", &set_gd4.bg_flags, NULL, 2, parse_uint },
263 { "exclude_bitmap", &set_gd4.bg_exclude_bitmap_lo,
264 &set_gd4.bg_exclude_bitmap_hi, 4, parse_uint },
265 { "block_bitmap_csum", &set_gd4.bg_block_bitmap_csum_lo,
266 &set_gd4.bg_block_bitmap_csum_hi, 2, parse_uint },
267 { "inode_bitmap_csum", &set_gd4.bg_inode_bitmap_csum_lo,
268 &set_gd4.bg_inode_bitmap_csum_hi, 2, parse_uint },
269 { "itable_unused", &set_gd4.bg_itable_unused,
270 &set_gd4.bg_itable_unused_hi, 2, parse_uint },
271 { "checksum", &set_gd4.bg_checksum, NULL, 2, parse_gd_csum },
275 static struct field_set_info mmp_fields[] = {
276 { "clear", &set_mmp.mmp_magic, NULL, sizeof(set_mmp),
277 parse_mmp_clear, FLAG_ALIAS },
278 { "magic", &set_mmp.mmp_magic, NULL, 4, parse_uint },
279 { "seq", &set_mmp.mmp_seq, NULL, 4, parse_uint },
280 { "time", &set_mmp.mmp_time, NULL, 8, parse_uint },
281 { "nodename", &set_mmp.mmp_nodename, NULL, sizeof(set_mmp.mmp_nodename),
283 { "bdevname", &set_mmp.mmp_bdevname, NULL, sizeof(set_mmp.mmp_bdevname),
285 { "check_interval", &set_mmp.mmp_check_interval, NULL, 2, parse_uint },
286 { "checksum", &set_mmp.mmp_checksum, NULL, 4, parse_uint },
289 #pragma GCC diagnostic pop
294 static void do_verify_field_set_info(struct field_set_info *fields,
295 const void *data, size_t size)
297 struct field_set_info *ss, *ss2;
298 const char *begin = (char *)data;
299 const char *end = begin + size;
301 for (ss = fields ; ss->name ; ss++) {
306 assert(!ptr || (ptr >= begin && ptr < end));
308 assert(!ptr || (ptr >= begin && ptr < end));
313 for (ss2 = fields ; ss2 != ss ; ss2++) {
314 /* Check duplicate names */
315 assert(strcmp(ss->name, ss2->name));
317 if (ss->flags & FLAG_ALIAS || ss2->flags & FLAG_ALIAS)
319 /* Check false aliases, might be copy-n-paste error */
320 assert(!ss->ptr || (ss->ptr != ss2->ptr &&
321 ss->ptr != ss2->ptr2));
322 assert(!ss->ptr2 || (ss->ptr2 != ss2->ptr &&
323 ss->ptr2 != ss2->ptr2));
328 int main(int argc, char **argv)
330 do_verify_field_set_info(super_fields, &set_sb, sizeof(set_sb));
331 do_verify_field_set_info(inode_fields, &set_inode, sizeof(set_inode));
332 do_verify_field_set_info(ext2_bg_fields, &set_gd, sizeof(set_gd));
333 do_verify_field_set_info(ext4_bg_fields, &set_gd4, sizeof(set_gd4));
334 do_verify_field_set_info(mmp_fields, &set_mmp, sizeof(set_mmp));
338 ext2_filsys current_fs;
339 ext2_ino_t root, cwd;
341 #endif /* UNITTEST */
343 static int check_suffix(const char *field)
345 int len = strlen(field);
350 if (!strcmp(field, "_lo"))
352 if (!strcmp(field, "_hi"))
357 static struct field_set_info *find_field(struct field_set_info *fields,
360 struct field_set_info *ss;
362 char *arg, *delim, *idx, *tmp;
363 int suffix, prefix_len;
365 if (fields == super_fields)
367 else if (fields == inode_fields)
371 prefix_len = strlen(prefix);
372 if (strncmp(field, prefix, prefix_len) == 0)
375 arg = malloc(strlen(field)+1);
380 idx = strchr(arg, '[');
383 delim = idx + strlen(idx) - 1;
384 if (!*idx || *delim != ']')
390 * Can we parse the number?
393 array_idx = strtol(idx, &tmp, 0);
402 * If there is a valid _hi or a _lo suffix, strip it off
404 suffix = check_suffix(arg);
406 arg[strlen(arg)-3] = 0;
408 for (ss = fields ; ss->name ; ss++) {
409 if (suffix && ss->ptr2 == 0)
411 if (ss->flags & FLAG_ARRAY) {
412 if (!idx || (strcmp(ss->name, arg) != 0))
414 if (ss->max_idx > 0 && array_idx >= ss->max_idx)
417 if (strcmp(ss->name, arg) != 0)
428 * Note: info->size == 6 is special; this means a base size 4 bytes,
429 * and secondiory (high) size of 2 bytes. This is needed for the
430 * special case of i_blocks_high and i_file_acl_high.
432 static errcode_t parse_uint(struct field_set_info *info, char *field,
435 unsigned long long n, num, mask, limit;
436 int suffix = check_suffix(field);
438 void *field1 = info->ptr, *field2 = info->ptr2;
439 int size = (info->size == 6) ? 4 : info->size;
454 u.ptr8 = (__u8 *) field1;
455 if (info->flags & FLAG_ARRAY)
456 u.ptr8 += array_idx * info->size;
459 num = STRTOULL(arg, &tmp, 0);
461 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
465 mask = ~0ULL >> ((8 - size) * 8);
466 limit = ~0ULL >> ((8 - info->size) * 8);
467 if (field2 && info->size != 6)
468 limit = ~0ULL >> ((8 - info->size*2) * 8);
471 fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n",
472 arg, info->name, limit);
478 /* Should never get here */
479 fprintf(stderr, "64-bit field %s has a second 64-bit field\n"
480 "defined; BUG?!?\n", info->name);
496 u.ptr8 = (__u8 *) field2;
516 static errcode_t parse_int(struct field_set_info *info,
517 char *field EXT2FS_ATTR((unused)), char *arg)
525 num = strtol(arg, &tmp, 0);
527 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
531 switch (info->size) {
533 ptr32 = (__s32 *) info->ptr;
537 ptr16 = (__s16 *) info->ptr;
541 ptr8 = (__s8 *) info->ptr;
548 static errcode_t parse_string(struct field_set_info *info,
549 char *field EXT2FS_ATTR((unused)), char *arg)
551 char *cp = (char *) info->ptr;
553 if (strlen(arg) >= info->size) {
554 fprintf(stderr, "Error maximum size for %s is %d.\n",
555 info->name, info->size);
562 static errcode_t parse_time(struct field_set_info *info,
563 char *field, char *arg)
567 __u32 *ptr_low, *ptr_high;
568 int suffix = check_suffix(field);
570 if (check_suffix(field))
571 return parse_uint(info, field, arg);
573 ptr_low = (__u32 *) info->ptr;
574 ptr_high = (__u32 *) info->ptr2;
576 t = string_to_time(arg);
579 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
584 t_high = ((t - (__s32)t) >> 32) & EXT4_EPOCH_MASK;
587 *ptr_high = (*ptr_high & ~EXT4_EPOCH_MASK) | t_high;
591 static errcode_t parse_uuid(struct field_set_info *info,
592 char *field EXT2FS_ATTR((unused)), char *arg)
594 unsigned char * p = (unsigned char *) info->ptr;
596 if ((strcasecmp(arg, "null") == 0) ||
597 (strcasecmp(arg, "clear") == 0)) {
599 } else if (strcasecmp(arg, "time") == 0) {
600 uuid_generate_time(p);
601 } else if (strcasecmp(arg, "random") == 0) {
603 } else if (uuid_parse(arg, p)) {
604 fprintf(stderr, "Invalid UUID format: %s\n", arg);
610 static errcode_t parse_hashalg(struct field_set_info *info,
611 char *field EXT2FS_ATTR((unused)), char *arg)
614 unsigned char *p = (unsigned char *) info->ptr;
616 hashv = e2p_string2hash(arg);
618 fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
625 static errcode_t parse_bmap(struct field_set_info *info,
626 char *field EXT2FS_ATTR((unused)), char *arg)
632 blk = strtoull(arg, &tmp, 0);
634 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
639 retval = ext2fs_bmap2(current_fs, set_ino,
640 (struct ext2_inode *) &set_inode,
641 NULL, BMAP_ALLOC | BMAP_SET, array_idx, NULL,
644 com_err("set_inode", retval, "while setting block map");
649 static errcode_t parse_gd_csum(struct field_set_info *info, char *field,
653 if (strcmp(arg, "calc") == 0) {
654 ext2fs_group_desc_csum_set(current_fs, set_bg);
655 memcpy(&set_gd, ext2fs_group_desc(current_fs,
656 current_fs->group_desc,
659 printf("Checksum set to 0x%04x\n",
660 ext2fs_bg_checksum(current_fs, set_bg));
664 return parse_uint(info, field, arg);
667 static void print_possible_fields(struct field_set_info *fields)
669 struct field_set_info *ss;
670 const char *type, *cmd;
672 char name[40], idx[40];
674 if (fields == super_fields) {
676 cmd = "set_super_value";
677 } else if (fields == inode_fields) {
680 } else if (fields == mmp_fields) {
682 cmd = "set_mmp_value";
684 type = "Block group descriptor";
685 cmd = "set_block_group";
689 fprintf(f, "%s fields supported by the %s command:\n", type, cmd);
691 for (ss = fields ; ss->name ; ss++) {
693 if (ss->func == parse_string)
695 else if (ss->func == parse_int)
697 else if (ss->func == parse_uint)
698 type = "unsigned integer";
699 else if (ss->func == parse_uuid)
701 else if (ss->func == parse_hashalg)
702 type = "hash algorithm";
703 else if (ss->func == parse_time)
705 else if (ss->func == parse_bmap)
706 type = "set physical->logical block map";
707 else if (ss->func == parse_gd_csum)
708 type = "unsigned integer OR \"calc\"";
709 strcpy(name, ss->name);
710 if (ss->flags & FLAG_ARRAY) {
712 sprintf(idx, "[%d]", ss->max_idx);
718 strcat(name, "[_hi|_lo]");
719 fprintf(f, "\t%-25s\t%s\n", name, type);
725 void do_set_super(int argc, char *argv[])
727 const char *usage = "<field> <value>\n"
728 "\t\"set_super_value -l\" will list the names of "
729 "superblock fields\n\twhich can be set.";
730 static struct field_set_info *ss;
732 if ((argc == 2) && !strcmp(argv[1], "-l")) {
733 print_possible_fields(super_fields);
737 if (common_args_process(argc, argv, 3, 3, "set_super_value",
741 if ((ss = find_field(super_fields, argv[1])) == 0) {
742 com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
745 set_sb = *current_fs->super;
746 if (ss->func(ss, argv[1], argv[2]) == 0) {
747 *current_fs->super = set_sb;
748 ext2fs_mark_super_dirty(current_fs);
752 void do_set_inode(int argc, char *argv[])
754 const char *usage = "<inode> <field> <value>\n"
755 "\t\"set_inode_field -l\" will list the names of "
756 "the fields in an ext2 inode\n\twhich can be set.";
757 static struct field_set_info *ss;
759 if ((argc == 2) && !strcmp(argv[1], "-l")) {
760 print_possible_fields(inode_fields);
764 if (common_args_process(argc, argv, 4, 4, "set_inode",
768 if ((ss = find_field(inode_fields, argv[2])) == 0) {
769 com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
773 set_ino = string_to_inode(argv[1]);
777 if (debugfs_read_inode_full(set_ino,
778 (struct ext2_inode *) &set_inode, argv[1],
782 if (ss->func(ss, argv[2], argv[3]) == 0) {
783 if (debugfs_write_inode_full(set_ino,
784 (struct ext2_inode *) &set_inode,
785 argv[1], sizeof(set_inode)))
790 void do_set_block_group_descriptor(int argc, char *argv[])
792 const char *usage = "<bg number> <field> <value>\n"
793 "\t\"set_block_group_descriptor -l\" will list the names of "
794 "the fields in a block group descriptor\n\twhich can be set.";
795 struct field_set_info *table;
796 struct field_set_info *ss;
802 * Determine whether we are editing an ext2 or ext4 block group
803 * descriptor. Descriptors larger than ext4_group_desc cannot
804 * have their fields edited yet, because they do not have any
805 * names assigned. When that happens, this function needs to
806 * be updated for the new descriptor struct and fields.
809 EXT2_DESC_SIZE(current_fs->super) >= EXT2_MIN_DESC_SIZE_64BIT) {
810 table = ext4_bg_fields;
812 size = sizeof(set_gd4);
814 table = ext2_bg_fields;
816 size = sizeof(set_gd);
819 if ((argc == 2) && !strcmp(argv[1], "-l")) {
820 print_possible_fields(table);
824 if (common_args_process(argc, argv, 4, 4, "set_block_group_descriptor",
828 set_bg = strtoul(argv[1], &end, 0);
830 com_err(argv[0], 0, "invalid block group number: %s", argv[1]);
834 if (set_bg >= current_fs->group_desc_count) {
835 com_err(argv[0], 0, "block group number too big: %d", set_bg);
839 if ((ss = find_field(table, argv[2])) == 0) {
840 com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
844 target = ext2fs_group_desc(current_fs, current_fs->group_desc, set_bg);
845 memcpy(edit, target, size);
846 if (ss->func(ss, argv[2], argv[3]) == 0) {
847 memcpy(target, edit, size);
848 ext2fs_mark_super_dirty(current_fs);
852 static errcode_t parse_mmp_clear(struct field_set_info *info,
853 char *field EXT2FS_ATTR((unused)),
854 char *arg EXT2FS_ATTR((unused)))
858 retval = ext2fs_mmp_clear(current_fs);
860 com_err("set_mmp_value", retval, "while clearing MMP block\n");
862 memcpy(info->ptr, current_fs->mmp_buf, info->size);
864 return 1; /* we don't need the MMP block written again */
868 void do_set_mmp_value(int argc, char *argv[])
870 const char *usage = "<field> <value>\n"
871 "\t\"set_mmp_value -l\" will list the names of "
872 "MMP fields\n\twhich can be set.";
873 static struct field_set_info *smmp;
874 struct mmp_struct *mmp_s;
877 if (argc == 2 && strcmp(argv[1], "-l") == 0) {
878 print_possible_fields(mmp_fields);
882 if (check_fs_open(argv[0]))
885 if (current_fs->super->s_mmp_block == 0) {
886 com_err(argv[0], 0, "no MMP block allocated\n");
890 if (common_args_process(argc, argv, 2, 3, "set_mmp_value",
894 mmp_s = current_fs->mmp_buf;
896 retval = ext2fs_get_mem(current_fs->blocksize, &mmp_s);
898 com_err(argv[0], retval, "allocating MMP buffer\n");
901 retval = ext2fs_mmp_read(current_fs,
902 current_fs->super->s_mmp_block, mmp_s);
904 com_err(argv[0], retval, "reading MMP block %llu.\n",
905 (long long)current_fs->super->s_mmp_block);
906 ext2fs_free_mem(&mmp_s);
909 current_fs->mmp_buf = mmp_s;
912 smmp = find_field(mmp_fields, argv[1]);
914 com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
919 if (smmp->func(smmp, argv[1], argv[2]) == 0) {
920 ext2fs_mmp_write(current_fs, current_fs->super->s_mmp_block,
926 void do_set_mmp_value(int argc EXT2FS_ATTR((unused)),
927 char *argv[] EXT2FS_ATTR((unused)))
929 fprintf(stdout, "MMP is unsupported, please recompile with "