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
13 /* Solaris for some strange reason drops struct
14 timeval if _XOPEN_SOURCE defined */
15 #define _XOPEN_SOURCE /* glibc2 needs this for strptime */
24 #include <sys/types.h>
33 #include "uuid/uuid.h"
36 static struct ext2_super_block set_sb;
37 static struct ext2_inode set_inode;
38 static ext2_ino_t set_ino;
41 #define FLAG_ARRAY 0x0001
43 struct field_set_info {
47 errcode_t (*func)(struct field_set_info *info, char *arg);
52 static errcode_t parse_uint(struct field_set_info *info, char *arg);
53 static errcode_t parse_int(struct field_set_info *info, char *arg);
54 static errcode_t parse_string(struct field_set_info *info, char *arg);
55 static errcode_t parse_uuid(struct field_set_info *info, char *arg);
56 static errcode_t parse_hashalg(struct field_set_info *info, char *arg);
57 static errcode_t parse_time(struct field_set_info *info, char *arg);
58 static errcode_t parse_bmap(struct field_set_info *info, char *arg);
60 static struct field_set_info super_fields[] = {
61 { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
62 { "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
63 { "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
64 { "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
65 { "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
66 { "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
67 { "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
68 { "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
69 { "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
70 { "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
71 { "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
72 { "mtime", &set_sb.s_mtime, 4, parse_time },
73 { "wtime", &set_sb.s_wtime, 4, parse_time },
74 { "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
75 { "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
77 { "state", &set_sb.s_state, 2, parse_uint },
78 { "errors", &set_sb.s_errors, 2, parse_uint },
79 { "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
80 { "lastcheck", &set_sb.s_lastcheck, 4, parse_time },
81 { "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
82 { "creator_os", &set_sb.s_creator_os, 4, parse_uint },
83 { "rev_level", &set_sb.s_rev_level, 4, parse_uint },
84 { "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
85 { "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
86 { "first_ino", &set_sb.s_first_ino, 4, parse_uint },
87 { "inode_size", &set_sb.s_inode_size, 2, parse_uint },
88 { "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
89 { "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
90 { "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
91 { "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint },
92 { "uuid", &set_sb.s_uuid, 16, parse_uuid },
93 { "volume_name", &set_sb.s_volume_name, 16, parse_string },
94 { "last_mounted", &set_sb.s_last_mounted, 64, parse_string },
95 { "lastcheck", &set_sb.s_lastcheck, 4, parse_uint },
96 { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap,
98 { "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
99 { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
101 { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2,
104 { "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid },
105 { "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
106 { "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
107 { "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
108 { "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid },
109 { "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg },
110 { "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint },
111 /* s_reserved_word_pad */
112 { "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint },
113 { "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint },
114 { "mkfs_time", &set_sb.s_mkfs_time, 4, parse_time },
115 { "jnl_blocks", &set_sb.s_jnl_blocks[0], 4, parse_uint, FLAG_ARRAY,
120 static struct field_set_info inode_fields[] = {
121 { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
122 { "mode", &set_inode.i_mode, 2, parse_uint },
123 { "uid", &set_inode.i_uid, 2, parse_uint },
124 { "size", &set_inode.i_uid, 4, parse_uint },
125 { "atime", &set_inode.i_atime, 4, parse_time },
126 { "ctime", &set_inode.i_ctime, 4, parse_time },
127 { "mtime", &set_inode.i_mtime, 4, parse_time },
128 { "dtime", &set_inode.i_dtime, 4, parse_time },
129 { "gid", &set_inode.i_gid, 2, parse_uint },
130 { "links_count", &set_inode.i_links_count, 2, parse_uint },
131 { "blocks", &set_inode.i_blocks, 4, parse_uint },
132 { "flags", &set_inode.i_flags, 4, parse_uint },
133 { "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint },
134 { "block", &set_inode.i_block[0], 4, parse_uint, FLAG_ARRAY,
136 { "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], 4, parse_uint },
137 { "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], 4, parse_uint },
138 { "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], 4, parse_uint },
139 { "generation", &set_inode.i_generation, 4, parse_uint },
140 { "file_acl", &set_inode.i_file_acl, 4, parse_uint },
141 { "dir_acl", &set_inode.i_dir_acl, 4, parse_uint },
142 { "faddr", &set_inode.i_faddr, 4, parse_uint },
143 { "frag", &set_inode.osd2.linux2.l_i_frag, 8, parse_uint },
144 { "fsize", &set_inode.osd2.linux2.l_i_fsize, 8, parse_uint },
145 { "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 8, parse_uint },
146 { "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 8, parse_uint },
147 { "author", &set_inode.osd2.hurd2.h_i_author, 8, parse_uint },
148 { "bmap", NULL, 4, parse_bmap, FLAG_ARRAY },
152 static struct field_set_info *find_field(struct field_set_info *fields,
155 struct field_set_info *ss;
157 char *arg, *delim, *idx, *tmp;
159 if (fields == super_fields)
163 if (strncmp(field, prefix, 2) == 0)
166 arg = malloc(strlen(field)+1);
171 idx = strchr(arg, '[');
174 delim = idx + strlen(idx) - 1;
175 if (!*idx || *delim != ']')
181 * Can we parse the number?
184 array_idx = strtol(idx, &tmp, 0);
189 for (ss = fields ; ss->name ; ss++) {
190 if (ss->flags & FLAG_ARRAY) {
191 if (!idx || (strcmp(ss->name, arg) != 0))
193 if (ss->max_idx > 0 && array_idx >= ss->max_idx)
196 if (strcmp(ss->name, field) != 0)
205 static errcode_t parse_uint(struct field_set_info *info, char *arg)
215 u.ptr8 = (__u8 *) info->ptr;
216 if (info->flags & FLAG_ARRAY)
217 u.ptr8 += array_idx * info->size;
219 num = strtoul(arg, &tmp, 0);
221 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
225 switch (info->size) {
239 static errcode_t parse_int(struct field_set_info *info, char *arg)
247 num = strtol(arg, &tmp, 0);
249 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
253 switch (info->size) {
255 ptr32 = (__s32 *) info->ptr;
259 ptr16 = (__s16 *) info->ptr;
263 ptr8 = (__s8 *) info->ptr;
270 static errcode_t parse_string(struct field_set_info *info, char *arg)
272 char *cp = (char *) info->ptr;
274 if (strlen(arg) >= info->size) {
275 fprintf(stderr, "Error maximum size for %s is %d.\n",
276 info->name, info->size);
283 static errcode_t parse_time(struct field_set_info *info, char *arg)
288 ptr32 = (__u32 *) info->ptr;
290 if (strcmp(arg, "now") == 0) {
294 memset(&ts, 0, sizeof(ts));
296 strptime(arg, "%Y%m%d%H%M%S", &ts);
298 sscanf(arg, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
299 &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
302 if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
303 ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
304 ts.tm_min > 59 || ts.tm_sec > 61)
307 if (ts.tm_mday == 0) {
308 /* Try it as an integer... */
309 return parse_uint(info, arg);
311 *ptr32 = mktime(&ts);
315 static errcode_t parse_uuid(struct field_set_info *info, char *arg)
317 unsigned char * p = (unsigned char *) info->ptr;
319 if ((strcasecmp(arg, "null") == 0) ||
320 (strcasecmp(arg, "clear") == 0)) {
322 } else if (strcasecmp(arg, "time") == 0) {
323 uuid_generate_time(p);
324 } else if (strcasecmp(arg, "random") == 0) {
326 } else if (uuid_parse(arg, p)) {
327 fprintf(stderr, "Invalid UUID format: %s\n", arg);
333 static errcode_t parse_hashalg(struct field_set_info *info, char *arg)
336 unsigned char *p = (unsigned char *) info->ptr;
338 hashv = e2p_string2hash(arg);
340 fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
347 static errcode_t parse_bmap(struct field_set_info *info, char *arg)
354 num = strtoul(arg, &tmp, 0);
356 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
362 retval = ext2fs_bmap(current_fs, set_ino, &set_inode, 0, BMAP_SET,
365 com_err("set_inode", retval, "while setting block map");
371 static void print_possible_fields(struct field_set_info *fields)
373 struct field_set_info *ss;
374 const char *type, *cmd;
376 char name[40], idx[40];
378 if (fields == super_fields) {
380 cmd = "set_super_value";
387 fprintf(f, "%s fields supported by the %s command:\n", type, cmd);
389 for (ss = fields ; ss->name ; ss++) {
391 if (ss->func == parse_string)
393 else if (ss->func == parse_int)
395 else if (ss->func == parse_uint)
396 type = "unsigned integer";
397 else if (ss->func == parse_uuid)
399 else if (ss->func == parse_hashalg)
400 type = "hash algorithm";
401 else if (ss->func == parse_time)
403 else if (ss->func == parse_bmap)
404 type = "set physical->logical block map";
405 strcpy(name, ss->name);
406 if (ss->flags & FLAG_ARRAY) {
408 sprintf(idx, "[%d]", ss->max_idx);
413 fprintf(f, "\t%-20s\t%s\n", name, type);
419 void do_set_super(int argc, char *argv[])
421 const char *usage = "<field> <value>\n"
422 "\t\"set_super_value -l\" will list the names of "
423 "superblock fields\n\twhich can be set.";
424 static struct field_set_info *ss;
426 if ((argc == 2) && !strcmp(argv[1], "-l")) {
427 print_possible_fields(super_fields);
431 if (common_args_process(argc, argv, 3, 3, "set_super_value",
435 if ((ss = find_field(super_fields, argv[1])) == 0) {
436 com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
439 set_sb = *current_fs->super;
440 if (ss->func(ss, argv[2]) == 0) {
441 *current_fs->super = set_sb;
442 ext2fs_mark_super_dirty(current_fs);
446 void do_set_inode(int argc, char *argv[])
448 const char *usage = "<inode> <field> <value>\n"
449 "\t\"set_inode_field -l\" will list the names of "
450 "the fields in an ext2 inode\n\twhich can be set.";
451 static struct field_set_info *ss;
453 if ((argc == 2) && !strcmp(argv[1], "-l")) {
454 print_possible_fields(inode_fields);
458 if (common_args_process(argc, argv, 4, 4, "set_inode",
462 if ((ss = find_field(inode_fields, argv[2])) == 0) {
463 com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
467 set_ino = string_to_inode(argv[1]);
471 if (debugfs_read_inode(set_ino, &set_inode, argv[1]))
474 if (ss->func(ss, argv[3]) == 0) {
475 if (debugfs_write_inode(set_ino, &set_inode, argv[1]))