+++ /dev/null
-/*
- * setsuper.c --- set a superblock value
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#include <time.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#include <fcntl.h>
-#include <utime.h>
-
-#include "debugfs.h"
-#include "uuid/uuid.h"
-#include "e2p/e2p.h"
-
-static struct ext2_super_block set_sb;
-
-struct super_set_info {
- const char *name;
- void *ptr;
- unsigned int size;
- errcode_t (*func)(struct super_set_info *info, char *arg);
-};
-
-static errcode_t parse_uint(struct super_set_info *info, char *arg);
-static errcode_t parse_int(struct super_set_info *info, char *arg);
-static errcode_t parse_string(struct super_set_info *info, char *arg);
-static errcode_t parse_uuid(struct super_set_info *info, char *arg);
-static errcode_t parse_hashalg(struct super_set_info *info, char *arg);
-
-static struct super_set_info super_fields[] = {
- { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
- { "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
- { "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
- { "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
- { "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
- { "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
- { "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
- { "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
- { "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
- { "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
- { "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
- /* s_mtime (time_t) */
- /* s_wtime (time_t) */
- { "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
- { "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
- /* s_magic */
- { "state", &set_sb.s_state, 2, parse_uint },
- { "errors", &set_sb.s_errors, 2, parse_uint },
- { "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
- /* s_lastcheck (time_t) */
- { "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
- { "creator_os", &set_sb.s_creator_os, 4, parse_uint },
- { "rev_level", &set_sb.s_rev_level, 4, parse_uint },
- { "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
- { "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
- { "first_ino", &set_sb.s_first_ino, 4, parse_uint },
- { "inode_size", &set_sb.s_inode_size, 2, parse_uint },
- { "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
- { "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
- { "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
- { "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint },
- { "uuid", &set_sb.s_uuid, 16, parse_uuid },
- { "volume_name", &set_sb.s_volume_name, 16, parse_string },
- { "last_mounted", &set_sb.s_last_mounted, 64, parse_string },
- { "lastcheck", &set_sb.s_lastcheck, 4, parse_uint },
- { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap,
- 4, parse_uint },
- { "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
- { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
- parse_uint },
- { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2,
- parse_uint },
- /* s_padding1 */
- { "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid },
- { "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
- { "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
- { "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
- { "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid },
- { "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg },
- { "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint },
- /* s_reserved_word_pad */
- { "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint },
- { "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint },
- { "mkfs_time", &set_sb.s_mkfs_time, 4, parse_uint },
- { 0, 0, 0, 0 }
-};
-
-static struct super_set_info *find_field(char *field)
-{
- struct super_set_info *ss;
-
- if (strncmp(field, "s_", 2) == 0)
- field += 2;
- for (ss = super_fields ; ss->name ; ss++) {
- if (strcmp(ss->name, field) == 0)
- return ss;
- }
- return NULL;
-}
-
-static errcode_t parse_uint(struct super_set_info *info, char *arg)
-{
- unsigned long num;
- char *tmp;
- __u32 *ptr32;
- __u16 *ptr16;
- __u8 *ptr8;
-
- num = strtoul(arg, &tmp, 0);
- if (*tmp) {
- fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
- arg, info->name);
- return EINVAL;
- }
- switch (info->size) {
- case 4:
- ptr32 = (__u32 *) info->ptr;
- *ptr32 = num;
- break;
- case 2:
- ptr16 = (__u16 *) info->ptr;
- *ptr16 = num;
- break;
- case 1:
- ptr8 = (__u8 *) info->ptr;
- *ptr8 = num;
- break;
- }
- return 0;
-}
-
-static errcode_t parse_int(struct super_set_info *info, char *arg)
-{
- long num;
- char *tmp;
- __s32 *ptr32;
- __s16 *ptr16;
- __s8 *ptr8;
-
- num = strtol(arg, &tmp, 0);
- if (*tmp) {
- fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
- arg, info->name);
- return EINVAL;
- }
- switch (info->size) {
- case 4:
- ptr32 = (__s32 *) info->ptr;
- *ptr32 = num;
- break;
- case 2:
- ptr16 = (__s16 *) info->ptr;
- *ptr16 = num;
- break;
- case 1:
- ptr8 = (__s8 *) info->ptr;
- *ptr8 = num;
- break;
- }
- return 0;
-}
-
-static errcode_t parse_string(struct super_set_info *info, char *arg)
-{
- char *cp = (char *) info->ptr;
-
- if (strlen(arg) >= info->size) {
- fprintf(stderr, "Error maximum size for %s is %d.\n",
- info->name, info->size);
- return EINVAL;
- }
- strcpy(cp, arg);
- return 0;
-}
-
-static errcode_t parse_uuid(struct super_set_info *info, char *arg)
-{
- unsigned char * p = (unsigned char *) info->ptr;
-
- if ((strcasecmp(arg, "null") == 0) ||
- (strcasecmp(arg, "clear") == 0)) {
- uuid_clear(p);
- } else if (strcasecmp(arg, "time") == 0) {
- uuid_generate_time(p);
- } else if (strcasecmp(arg, "random") == 0) {
- uuid_generate(p);
- } else if (uuid_parse(arg, p)) {
- fprintf(stderr, "Invalid UUID format: %s\n", arg);
- return EINVAL;
- }
- return 0;
-}
-
-static errcode_t parse_hashalg(struct super_set_info *info, char *arg)
-{
- int hashv;
- unsigned char *p = (unsigned char *) info->ptr;
-
- hashv = e2p_string2hash(arg);
- if (hashv < 0) {
- fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
- return EINVAL;
- }
- *p = hashv;
- return 0;
-}
-
-
-static void print_possible_fields(void)
-{
- struct super_set_info *ss;
- const char *type;
-
- printf("Superblock fields supported by the set_super_value command:\n");
- for (ss = super_fields ; ss->name ; ss++) {
- type = "unknown";
- if (ss->func == parse_string)
- type = "string";
- else if (ss->func == parse_int)
- type = "integer";
- else if (ss->func == parse_uint)
- type = "unsigned integer";
- else if (ss->func == parse_uuid)
- type = "UUID";
- else if (ss->func == parse_hashalg)
- type = "hash algorithm";
- printf("\t%-20s\t%s\n", ss->name, type);
- }
-}
-
-
-void do_set_super(int argc, char *argv[])
-{
- const char *usage = "<field> <value>\n"
- "\t\"set_super_value -l\" will list the names of "
- "superblock fields\n\twhich can be set.";
- static struct super_set_info *ss;
-
- if ((argc == 2) && !strcmp(argv[1], "-l")) {
- print_possible_fields();
- return;
- }
-
- if (common_args_process(argc, argv, 3, 3, "set_super_value",
- usage, CHECK_FS_RW))
- return;
-
- if ((ss = find_field(argv[1])) == 0) {
- com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
- return;
- }
- set_sb = *current_fs->super;
- if (ss->func(ss, argv[2]) == 0) {
- *current_fs->super = set_sb;
- ext2fs_mark_super_dirty(current_fs);
- }
-}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff