[thirdparty/e2fsprogs.git] / debugfs / set_fields.c

/*
 * set_fields.c --- set a superblock value
 *
 * Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#define _XOPEN_SOURCE 600 /* for inclusion of strptime() and strtoull */

#ifdef HAVE_STRTOULL
#define STRTOULL strtoull
#else
#define STRTOULL strtoul
#endif

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_STRINGS_H
#include <strings.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;
static struct ext2_inode set_inode;
static struct ext2_group_desc set_gd;
static dgrp_t set_bg;
static ext2_ino_t set_ino;
static int array_idx;

#define FLAG_ARRAY	0x0001

struct field_set_info {
	const char	*name;
	void	*ptr;
	unsigned int	size;
	errcode_t (*func)(struct field_set_info *info, char *arg);
	int flags;
	int max_idx;
};

static errcode_t parse_uint(struct field_set_info *info, char *arg);
static errcode_t parse_int(struct field_set_info *info, char *arg);
static errcode_t parse_string(struct field_set_info *info, char *arg);
static errcode_t parse_uuid(struct field_set_info *info, char *arg);
static errcode_t parse_hashalg(struct field_set_info *info, char *arg);
static errcode_t parse_time(struct field_set_info *info, char *arg);
static errcode_t parse_bmap(struct field_set_info *info, char *arg);
static errcode_t parse_gd_csum(struct field_set_info *info, char *arg);

static struct field_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 },
	{ "mtime", &set_sb.s_mtime, 4, parse_time },
	{ "wtime", &set_sb.s_wtime, 4, parse_time },
	{ "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 },
	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_time },
	{ "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 },
	{ "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 },
	{ "desc_size", &set_sb.s_desc_size, 2, parse_uint },
	{ "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_time },
	{ "jnl_blocks", &set_sb.s_jnl_blocks[0], 4, parse_uint, FLAG_ARRAY,
	  17 },
	{ "blocks_count_hi", &set_sb.s_blocks_count_hi, 4, parse_uint },
	{ "r_blocks_count_hi", &set_sb.s_r_blocks_count_hi, 4, parse_uint },
	{ "min_extra_isize", &set_sb.s_min_extra_isize, 2, parse_uint },
	{ "want_extra_isize", &set_sb.s_want_extra_isize, 2, parse_uint },
	{ "flags", &set_sb.s_flags, 4, parse_uint },
	{ "raid_stride", &set_sb.s_raid_stride, 2, parse_uint },
	{ "min_extra_isize", &set_sb.s_min_extra_isize, 4, parse_uint },
	{ "mmp_interval", &set_sb.s_mmp_interval, 2, parse_uint },
	{ "mmp_block", &set_sb.s_mmp_block, 8, parse_uint },
	{ "raid_stripe_width", &set_sb.s_raid_stripe_width, 4, parse_uint },
	{ "log_groups_per_flex", &set_sb.s_log_groups_per_flex, 1, parse_uint },
	{ 0, 0, 0, 0 }
};

static struct field_set_info inode_fields[] = {
	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	{ "mode", &set_inode.i_mode, 2, parse_uint },
	{ "uid", &set_inode.i_uid, 2, parse_uint },
	{ "size", &set_inode.i_size, 4, parse_uint },
	{ "atime", &set_inode.i_atime, 4, parse_time },
	{ "ctime", &set_inode.i_ctime, 4, parse_time },
	{ "mtime", &set_inode.i_mtime, 4, parse_time },
	{ "dtime", &set_inode.i_dtime, 4, parse_time },
	{ "gid", &set_inode.i_gid, 2, parse_uint },
	{ "links_count", &set_inode.i_links_count, 2, parse_uint },
	{ "blocks", &set_inode.i_blocks, 4, parse_uint },
	{ "flags", &set_inode.i_flags, 4, parse_uint },
	{ "version", &set_inode.osd1.linux1.l_i_version, 4, parse_uint },
	{ "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint },
	{ "block", &set_inode.i_block[0], 4, parse_uint, FLAG_ARRAY,
	  EXT2_NDIR_BLOCKS },
	{ "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], 4, parse_uint },
	{ "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], 4, parse_uint },
	{ "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], 4, parse_uint },
	{ "generation", &set_inode.i_generation, 4, parse_uint },
	{ "file_acl", &set_inode.i_file_acl, 4, parse_uint },
	{ "dir_acl", &set_inode.i_dir_acl, 4, parse_uint },
	{ "size_high", &set_inode.i_size_high, 4, parse_uint },
	{ "faddr", &set_inode.i_faddr, 4, parse_uint },
	{ "blocks_hi", &set_inode.osd2.linux2.l_i_blocks_hi, 2, parse_uint },
	{ "frag", &set_inode.osd2.hurd2.h_i_frag, 1, parse_uint },
	{ "fsize", &set_inode.osd2.hurd2.h_i_fsize, 1, parse_uint },
	{ "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 2, parse_uint },
	{ "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 2, parse_uint },
	{ "author", &set_inode.osd2.hurd2.h_i_author, 4, parse_uint },
	{ "bmap", NULL, 4, parse_bmap, FLAG_ARRAY },
	{ 0, 0, 0, 0 }
};

static struct field_set_info ext2_bg_fields[] = {
	{ "block_bitmap", &set_gd.bg_block_bitmap, 4, parse_uint },
	{ "inode_bitmap", &set_gd.bg_inode_bitmap, 4, parse_uint },
	{ "inode_table", &set_gd.bg_inode_table, 4, parse_uint },
	{ "free_blocks_count", &set_gd.bg_free_blocks_count, 2, parse_uint },
	{ "free_inodes_count", &set_gd.bg_free_inodes_count, 2, parse_uint },
	{ "used_dirs_count", &set_gd.bg_used_dirs_count, 2, parse_uint },
	{ "flags", &set_gd.bg_flags, 2, parse_uint },
	{ "reserved", &set_gd.bg_reserved, 2, parse_uint, FLAG_ARRAY, 2 },
	{ "itable_unused", &set_gd.bg_itable_unused, 2, parse_uint },
	{ "checksum", &set_gd.bg_checksum, 2, parse_gd_csum },
	{ 0, 0, 0, 0 }
};


static struct field_set_info *find_field(struct field_set_info *fields,
					 char *field)
{
	struct field_set_info *ss;
	const char	*prefix;
	char		*arg, *delim, *idx, *tmp;
	int		prefix_len;

	if (fields == super_fields)
		prefix = "s_";
	else if (fields == inode_fields)
		prefix = "i_";
	else
		prefix = "bg_";
	prefix_len = strlen(prefix);
	if (strncmp(field, prefix, prefix_len) == 0)
		field += prefix_len;

	arg = malloc(strlen(field)+1);
	if (!arg)
		return NULL;
	strcpy(arg, field);

	idx = strchr(arg, '[');
	if (idx) {
		*idx++ = 0;
		delim = idx + strlen(idx) - 1;
		if (!*idx || *delim != ']')
			idx = 0;
		else
			*delim = 0;
	}
	/*
	 * Can we parse the number?
	 */
	if (idx) {
		array_idx = strtol(idx, &tmp, 0);
		if (*tmp)
			idx = 0;
	}

	for (ss = fields ; ss->name ; ss++) {
		if (ss->flags & FLAG_ARRAY) {
			if (!idx || (strcmp(ss->name, arg) != 0))
				continue;
			if (ss->max_idx > 0 && array_idx >= ss->max_idx)
				continue;
		} else {
			if (strcmp(ss->name, field) != 0)
				continue;
		}
		return ss;
	}

	return NULL;
}

static errcode_t parse_uint(struct field_set_info *info, char *arg)
{
	unsigned long long num, limit;
	char *tmp;
	union {
		__u64	*ptr64;
		__u32	*ptr32;
		__u16	*ptr16;
		__u8	*ptr8;
	} u;

	u.ptr8 = (__u8 *) info->ptr;
	if (info->flags & FLAG_ARRAY)
		u.ptr8 += array_idx * info->size;

	errno = 0;
	num = STRTOULL(arg, &tmp, 0);
	if (*tmp || errno) {
		fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
			arg, info->name);
		return EINVAL;
	}
	limit = ~0ULL >> ((8 - info->size) * 8);
	if (num > limit) {
		fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n",
			arg, info->name, limit);
		return EINVAL;
	}
	switch (info->size) {
	case 8:
		*u.ptr64 = num;
		break;
	case 4:
		*u.ptr32 = num;
		break;
	case 2:
		*u.ptr16 = num;
		break;
	case 1:
		*u.ptr8 = num;
		break;
	}
	return 0;
}

static errcode_t parse_int(struct field_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 field_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_time(struct field_set_info *info, char *arg)
{
	time_t		t;
	__u32		*ptr32;

	ptr32 = (__u32 *) info->ptr;

	t = string_to_time(arg);

	if (t == ((time_t) -1)) {
		fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
			arg, info->name);
		return EINVAL;
	}
	*ptr32 = t;
	return 0;
}

static errcode_t parse_uuid(struct field_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 field_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 errcode_t parse_bmap(struct field_set_info *info, char *arg)
{
	unsigned long	num;
	blk_t		blk;
	errcode_t	retval;
	char		*tmp;

	num = strtoul(arg, &tmp, 0);
	if (*tmp) {
		fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
			arg, info->name);
		return EINVAL;
	}
	blk = num;

	retval = ext2fs_bmap(current_fs, set_ino, &set_inode, 0, BMAP_SET,
			     array_idx, &blk);
	if (retval) {
		com_err("set_inode", retval, "while setting block map");
	}
	return retval;
}

static errcode_t parse_gd_csum(struct field_set_info *info, char *arg)
{

	if (strcmp(arg, "calc") == 0) {
		ext2fs_group_desc_csum_set(current_fs, set_bg);
		set_gd = current_fs->group_desc[set_bg];
		printf("Checksum set to 0x%04x\n",
		       current_fs->group_desc[set_bg].bg_checksum);
		return 0;
	}

	return parse_uint(info, arg);
}

static void print_possible_fields(struct field_set_info *fields)
{
	struct field_set_info *ss;
	const char	*type, *cmd;
	FILE *f;
	char name[40], idx[40];

	if (fields == super_fields) {
		type = "Superblock";
		cmd = "set_super_value";
	} else if (fields == inode_fields) {
		type = "Inode";
		cmd = "set_inode";
	} else {
		type = "Block group descriptor";
		cmd = "set_block_group";
	}
	f = open_pager();

	fprintf(f, "%s fields supported by the %s command:\n", type, cmd);

	for (ss = 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";
		else if (ss->func == parse_time)
			type = "date/time";
		else if (ss->func == parse_bmap)
			type = "set physical->logical block map";
		strcpy(name, ss->name);
		if (ss->flags & FLAG_ARRAY) {
			if (ss->max_idx > 0)
				sprintf(idx, "[%d]", ss->max_idx);
			else
				strcpy(idx, "[]");
			strcat(name, idx);
		}
		fprintf(f, "\t%-20s\t%s\n", name, type);
	}
	close_pager(f);
}


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 field_set_info *ss;

	if ((argc == 2) && !strcmp(argv[1], "-l")) {
		print_possible_fields(super_fields);
		return;
	}

	if (common_args_process(argc, argv, 3, 3, "set_super_value",
				usage, CHECK_FS_RW))
		return;

	if ((ss = find_field(super_fields, 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);
	}
}

void do_set_inode(int argc, char *argv[])
{
	const char *usage = "<inode> <field> <value>\n"
		"\t\"set_inode_field -l\" will list the names of "
		"the fields in an ext2 inode\n\twhich can be set.";
	static struct field_set_info *ss;

	if ((argc == 2) && !strcmp(argv[1], "-l")) {
		print_possible_fields(inode_fields);
		return;
	}

	if (common_args_process(argc, argv, 4, 4, "set_inode",
				usage, CHECK_FS_RW))
		return;

	if ((ss = find_field(inode_fields, argv[2])) == 0) {
		com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
		return;
	}

	set_ino = string_to_inode(argv[1]);
	if (!set_ino)
		return;

	if (debugfs_read_inode(set_ino, &set_inode, argv[1]))
		return;

	if (ss->func(ss, argv[3]) == 0) {
		if (debugfs_write_inode(set_ino, &set_inode, argv[1]))
			return;
	}
}

void do_set_block_group_descriptor(int argc, char *argv[])
{
	const char *usage = "<bg number> <field> <value>\n"
		"\t\"set_block_group_descriptor -l\" will list the names of "
		"the fields in a block group descriptor\n\twhich can be set.";
	struct field_set_info	*ss;
	char			*end;

	if ((argc == 2) && !strcmp(argv[1], "-l")) {
		print_possible_fields(ext2_bg_fields);
		return;
	}

	if (common_args_process(argc, argv, 4, 4, "set_block_group_descriptor",
				usage, CHECK_FS_RW))
		return;

	set_bg = strtoul(argv[1], &end, 0);
	if (*end) {
		com_err(argv[0], 0, "invalid block group number: %s", argv[1]);
		return;
	}

	if (set_bg >= current_fs->group_desc_count) {
		com_err(argv[0], 0, "block group number too big: %d", set_bg);
		return;
	}


	if ((ss = find_field(ext2_bg_fields, argv[2])) == 0) {
		com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
		return;
	}

	set_gd = current_fs->group_desc[set_bg];

	if (ss->func(ss, argv[3]) == 0) {
		current_fs->group_desc[set_bg] = set_gd;
		ext2fs_mark_super_dirty(current_fs);
	}
}
Commit	Line	Data
c6bd0c97	1	/*
7dec050a	2	* set_fields.c --- set a superblock value
efc6f628	3	*
7dec050a	4	* Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o.
efc6f628	5	*
7dec050a TT	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the GNU Public
	8	* License.
	9	* %End-Header%
c6bd0c97 TT	10	*/
c6bd0c97 TT	11
007df860 TT	12	#define _XOPEN_SOURCE 600 /* for inclusion of strptime() and strtoull */
	13
	14	#ifdef HAVE_STRTOULL
	15	#define STRTOULL strtoull
	16	#else
	17	#define STRTOULL strtoul
	18	#endif
619a8ea7	19
c6bd0c97 TT	20	#include <stdio.h>
	21	#include <unistd.h>
	22	#include <stdlib.h>
	23	#include <ctype.h>
	24	#include <string.h>
8192c633	25	#include <strings.h>
c6bd0c97 TT	26	#include <time.h>
	27	#include <sys/types.h>
	28	#include <sys/stat.h>
	29	#ifdef HAVE_ERRNO_H
	30	#include <errno.h>
	31	#endif
a98b51e9 TT	32	#if HAVE_STRINGS_H
	33	#include <strings.h>
	34	#endif
c6bd0c97 TT	35	#include <fcntl.h>
	36	#include <utime.h>
	37
	38	#include "debugfs.h"
3e699064 TT	39	#include "uuid/uuid.h"
3e699064 TT	40	#include "e2p/e2p.h"
c6bd0c97 TT	41
c6bd0c97 TT	42	static struct ext2_super_block set_sb;
7dec050a	43	static struct ext2_inode set_inode;
c7c1209e	44	static struct ext2_group_desc set_gd;
cf96ecf1	45	static dgrp_t set_bg;
08fd3f36 TT	46	static ext2_ino_t set_ino;
	47	static int array_idx;
	48
	49	#define FLAG_ARRAY 0x0001
c6bd0c97	50
7dec050a	51	struct field_set_info {
b044c2e0	52	const char *name;
c6bd0c97	53	void *ptr;
54434927	54	unsigned int size;
7dec050a	55	errcode_t (func)(struct field_set_info info, char *arg);
08fd3f36 TT	56	int flags;
08fd3f36 TT	57	int max_idx;
c6bd0c97 TT	58	};
c6bd0c97 TT	59
7dec050a TT	60	static errcode_t parse_uint(struct field_set_info info, char arg);
	61	static errcode_t parse_int(struct field_set_info info, char arg);
	62	static errcode_t parse_string(struct field_set_info info, char arg);
	63	static errcode_t parse_uuid(struct field_set_info info, char arg);
	64	static errcode_t parse_hashalg(struct field_set_info info, char arg);
	65	static errcode_t parse_time(struct field_set_info info, char arg);
08fd3f36	66	static errcode_t parse_bmap(struct field_set_info info, char arg);
cf96ecf1	67	static errcode_t parse_gd_csum(struct field_set_info info, char arg);
c6bd0c97	68
7dec050a	69	static struct field_set_info super_fields[] = {
c6bd0c97 TT	70	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	71	{ "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
	72	{ "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
	73	{ "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
	74	{ "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
	75	{ "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
	76	{ "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
	77	{ "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
	78	{ "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
	79	{ "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
	80	{ "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
7dec050a TT	81	{ "mtime", &set_sb.s_mtime, 4, parse_time },
7dec050a TT	82	{ "wtime", &set_sb.s_wtime, 4, parse_time },
c6bd0c97 TT	83	{ "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
	84	{ "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
	85	/* s_magic */
	86	{ "state", &set_sb.s_state, 2, parse_uint },
	87	{ "errors", &set_sb.s_errors, 2, parse_uint },
	88	{ "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
7dec050a	89	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_time },
c6bd0c97 TT	90	{ "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
	91	{ "creator_os", &set_sb.s_creator_os, 4, parse_uint },
	92	{ "rev_level", &set_sb.s_rev_level, 4, parse_uint },
	93	{ "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
	94	{ "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
	95	{ "first_ino", &set_sb.s_first_ino, 4, parse_uint },
426d734f	96	{ "inode_size", &set_sb.s_inode_size, 2, parse_uint },
c6bd0c97 TT	97	{ "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
	98	{ "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
	99	{ "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
efc6f628	100	{ "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint },
f61fc0b5	101	{ "uuid", &set_sb.s_uuid, 16, parse_uuid },
c6bd0c97 TT	102	{ "volume_name", &set_sb.s_volume_name, 16, parse_string },
c6bd0c97 TT	103	{ "last_mounted", &set_sb.s_last_mounted, 64, parse_string },
364a373e	104	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_uint },
efc6f628	105	{ "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap,
c6bd0c97 TT	106	4, parse_uint },
	107	{ "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
	108	{ "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
	109	parse_uint },
a06bd026 TT	110	{ "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2,
a06bd026 TT	111	parse_uint },
f61fc0b5	112	{ "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid },
c6bd0c97 TT	113	{ "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
	114	{ "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
	115	{ "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
f61fc0b5 TT	116	{ "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid },
f61fc0b5 TT	117	{ "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg },
a06bd026	118	{ "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint },
007df860	119	{ "desc_size", &set_sb.s_desc_size, 2, parse_uint },
a06bd026 TT	120	{ "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint },
a06bd026 TT	121	{ "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint },
7dec050a	122	{ "mkfs_time", &set_sb.s_mkfs_time, 4, parse_time },
efc6f628	123	{ "jnl_blocks", &set_sb.s_jnl_blocks[0], 4, parse_uint, FLAG_ARRAY,
89c80156	124	17 },
007df860 TT	125	{ "blocks_count_hi", &set_sb.s_blocks_count_hi, 4, parse_uint },
	126	{ "r_blocks_count_hi", &set_sb.s_r_blocks_count_hi, 4, parse_uint },
	127	{ "min_extra_isize", &set_sb.s_min_extra_isize, 2, parse_uint },
	128	{ "want_extra_isize", &set_sb.s_want_extra_isize, 2, parse_uint },
f77704e4	129	{ "flags", &set_sb.s_flags, 4, parse_uint },
007df860 TT	130	{ "raid_stride", &set_sb.s_raid_stride, 2, parse_uint },
	131	{ "min_extra_isize", &set_sb.s_min_extra_isize, 4, parse_uint },
	132	{ "mmp_interval", &set_sb.s_mmp_interval, 2, parse_uint },
	133	{ "mmp_block", &set_sb.s_mmp_block, 8, parse_uint },
	134	{ "raid_stripe_width", &set_sb.s_raid_stripe_width, 4, parse_uint },
494a1daa	135	{ "log_groups_per_flex", &set_sb.s_log_groups_per_flex, 1, parse_uint },
c6bd0c97 TT	136	{ 0, 0, 0, 0 }
	137	};
	138
7dec050a TT	139	static struct field_set_info inode_fields[] = {
	140	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	141	{ "mode", &set_inode.i_mode, 2, parse_uint },
	142	{ "uid", &set_inode.i_uid, 2, parse_uint },
38d732bb	143	{ "size", &set_inode.i_size, 4, parse_uint },
7dec050a TT	144	{ "atime", &set_inode.i_atime, 4, parse_time },
	145	{ "ctime", &set_inode.i_ctime, 4, parse_time },
	146	{ "mtime", &set_inode.i_mtime, 4, parse_time },
	147	{ "dtime", &set_inode.i_dtime, 4, parse_time },
	148	{ "gid", &set_inode.i_gid, 2, parse_uint },
	149	{ "links_count", &set_inode.i_links_count, 2, parse_uint },
	150	{ "blocks", &set_inode.i_blocks, 4, parse_uint },
	151	{ "flags", &set_inode.i_flags, 4, parse_uint },
d362a3fb	152	{ "version", &set_inode.osd1.linux1.l_i_version, 4, parse_uint },
7dec050a	153	{ "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint },
efc6f628	154	{ "block", &set_inode.i_block[0], 4, parse_uint, FLAG_ARRAY,
08fd3f36 TT	155	EXT2_NDIR_BLOCKS },
	156	{ "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], 4, parse_uint },
	157	{ "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], 4, parse_uint },
	158	{ "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], 4, parse_uint },
7dec050a TT	159	{ "generation", &set_inode.i_generation, 4, parse_uint },
	160	{ "file_acl", &set_inode.i_file_acl, 4, parse_uint },
	161	{ "dir_acl", &set_inode.i_dir_acl, 4, parse_uint },
007df860	162	{ "size_high", &set_inode.i_size_high, 4, parse_uint },
7dec050a	163	{ "faddr", &set_inode.i_faddr, 4, parse_uint },
5d17119d TT	164	{ "blocks_hi", &set_inode.osd2.linux2.l_i_blocks_hi, 2, parse_uint },
	165	{ "frag", &set_inode.osd2.hurd2.h_i_frag, 1, parse_uint },
	166	{ "fsize", &set_inode.osd2.hurd2.h_i_fsize, 1, parse_uint },
caf037a4 TT	167	{ "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 2, parse_uint },
	168	{ "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 2, parse_uint },
	169	{ "author", &set_inode.osd2.hurd2.h_i_author, 4, parse_uint },
08fd3f36	170	{ "bmap", NULL, 4, parse_bmap, FLAG_ARRAY },
7dec050a TT	171	{ 0, 0, 0, 0 }
	172	};
	173
c7c1209e TT	174	static struct field_set_info ext2_bg_fields[] = {
	175	{ "block_bitmap", &set_gd.bg_block_bitmap, 4, parse_uint },
	176	{ "inode_bitmap", &set_gd.bg_inode_bitmap, 4, parse_uint },
	177	{ "inode_table", &set_gd.bg_inode_table, 4, parse_uint },
	178	{ "free_blocks_count", &set_gd.bg_free_blocks_count, 2, parse_uint },
	179	{ "free_inodes_count", &set_gd.bg_free_inodes_count, 2, parse_uint },
	180	{ "used_dirs_count", &set_gd.bg_used_dirs_count, 2, parse_uint },
	181	{ "flags", &set_gd.bg_flags, 2, parse_uint },
	182	{ "reserved", &set_gd.bg_reserved, 2, parse_uint, FLAG_ARRAY, 2 },
	183	{ "itable_unused", &set_gd.bg_itable_unused, 2, parse_uint },
cf96ecf1	184	{ "checksum", &set_gd.bg_checksum, 2, parse_gd_csum },
c7c1209e TT	185	{ 0, 0, 0, 0 }
	186	};
	187
	188
7dec050a TT	189	static struct field_set_info find_field(struct field_set_info fields,
7dec050a TT	190	char *field)
c6bd0c97	191	{
7dec050a	192	struct field_set_info *ss;
08fd3f36 TT	193	const char *prefix;
08fd3f36 TT	194	char arg, delim, idx, tmp;
c7c1209e	195	int prefix_len;
08fd3f36 TT	196
	197	if (fields == super_fields)
	198	prefix = "s_";
c7c1209e	199	else if (fields == inode_fields)
08fd3f36	200	prefix = "i_";
c7c1209e TT	201	else
	202	prefix = "bg_";
	203	prefix_len = strlen(prefix);
	204	if (strncmp(field, prefix, prefix_len) == 0)
	205	field += prefix_len;
08fd3f36 TT	206
	207	arg = malloc(strlen(field)+1);
	208	if (!arg)
	209	return NULL;
	210	strcpy(arg, field);
	211
	212	idx = strchr(arg, '[');
	213	if (idx) {
	214	*idx++ = 0;
	215	delim = idx + strlen(idx) - 1;
	216	if (!idx \|\| delim != ']')
	217	idx = 0;
	218	else
	219	*delim = 0;
	220	}
efc6f628	221	/*
08fd3f36 TT	222	* Can we parse the number?
	223	*/
	224	if (idx) {
	225	array_idx = strtol(idx, &tmp, 0);
	226	if (*tmp)
	227	idx = 0;
	228	}
	229
7dec050a	230	for (ss = fields ; ss->name ; ss++) {
08fd3f36 TT	231	if (ss->flags & FLAG_ARRAY) {
	232	if (!idx \|\| (strcmp(ss->name, arg) != 0))
	233	continue;
	234	if (ss->max_idx > 0 && array_idx >= ss->max_idx)
	235	continue;
	236	} else {
	237	if (strcmp(ss->name, field) != 0)
	238	continue;
	239	}
	240	return ss;
c6bd0c97	241	}
08fd3f36	242
c6bd0c97 TT	243	return NULL;
	244	}
	245
7dec050a	246	static errcode_t parse_uint(struct field_set_info info, char arg)
c6bd0c97	247	{
007df860	248	unsigned long long num, limit;
c6bd0c97	249	char *tmp;
08fd3f36	250	union {
007df860	251	__u64 *ptr64;
08fd3f36 TT	252	__u32 *ptr32;
	253	__u16 *ptr16;
	254	__u8 *ptr8;
	255	} u;
	256
	257	u.ptr8 = (__u8 *) info->ptr;
	258	if (info->flags & FLAG_ARRAY)
	259	u.ptr8 += array_idx * info->size;
c6bd0c97	260
007df860 TT	261	errno = 0;
	262	num = STRTOULL(arg, &tmp, 0);
	263	if (*tmp \|\| errno) {
c6bd0c97 TT	264	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	265	arg, info->name);
	266	return EINVAL;
	267	}
007df860 TT	268	limit = ~0ULL >> ((8 - info->size) * 8);
	269	if (num > limit) {
	270	fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n",
	271	arg, info->name, limit);
	272	return EINVAL;
	273	}
c6bd0c97	274	switch (info->size) {
007df860 TT	275	case 8:
	276	*u.ptr64 = num;
	277	break;
c6bd0c97	278	case 4:
08fd3f36	279	*u.ptr32 = num;
c6bd0c97 TT	280	break;
c6bd0c97 TT	281	case 2:
08fd3f36	282	*u.ptr16 = num;
c6bd0c97 TT	283	break;
c6bd0c97 TT	284	case 1:
08fd3f36	285	*u.ptr8 = num;
c6bd0c97 TT	286	break;
	287	}
	288	return 0;
	289	}
	290
7dec050a	291	static errcode_t parse_int(struct field_set_info info, char arg)
c6bd0c97 TT	292	{
	293	long num;
	294	char *tmp;
	295	__s32 *ptr32;
	296	__s16 *ptr16;
	297	__s8 *ptr8;
	298
	299	num = strtol(arg, &tmp, 0);
	300	if (*tmp) {
	301	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	302	arg, info->name);
	303	return EINVAL;
	304	}
	305	switch (info->size) {
	306	case 4:
	307	ptr32 = (__s32 *) info->ptr;
	308	*ptr32 = num;
	309	break;
	310	case 2:
	311	ptr16 = (__s16 *) info->ptr;
	312	*ptr16 = num;
	313	break;
	314	case 1:
	315	ptr8 = (__s8 *) info->ptr;
	316	*ptr8 = num;
	317	break;
	318	}
	319	return 0;
	320	}
	321
7dec050a	322	static errcode_t parse_string(struct field_set_info info, char arg)
c6bd0c97 TT	323	{
	324	char cp = (char ) info->ptr;
	325
	326	if (strlen(arg) >= info->size) {
	327	fprintf(stderr, "Error maximum size for %s is %d.\n",
	328	info->name, info->size);
	329	return EINVAL;
	330	}
	331	strcpy(cp, arg);
	332	return 0;
	333	}
	334
7dec050a TT	335	static errcode_t parse_time(struct field_set_info info, char arg)
7dec050a TT	336	{
e3e92534 TT	337	time_t t;
e3e92534 TT	338	__u32 *ptr32;
7dec050a TT	339
	340	ptr32 = (__u32 *) info->ptr;
	341
4efae606 TT	342	t = string_to_time(arg);
	343
	344	if (t == ((time_t) -1)) {
	345	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	346	arg, info->name);
	347	return EINVAL;
7dec050a	348	}
4efae606	349	*ptr32 = t;
7dec050a TT	350	return 0;
	351	}
	352
	353	static errcode_t parse_uuid(struct field_set_info info, char arg)
f61fc0b5	354	{
3e699064	355	unsigned char * p = (unsigned char *) info->ptr;
efc6f628	356
f61fc0b5 TT	357	if ((strcasecmp(arg, "null") == 0) \|\|
	358	(strcasecmp(arg, "clear") == 0)) {
	359	uuid_clear(p);
	360	} else if (strcasecmp(arg, "time") == 0) {
	361	uuid_generate_time(p);
	362	} else if (strcasecmp(arg, "random") == 0) {
	363	uuid_generate(p);
	364	} else if (uuid_parse(arg, p)) {
	365	fprintf(stderr, "Invalid UUID format: %s\n", arg);
	366	return EINVAL;
	367	}
	368	return 0;
	369	}
	370
7dec050a	371	static errcode_t parse_hashalg(struct field_set_info info, char arg)
f61fc0b5 TT	372	{
	373	int hashv;
	374	unsigned char p = (unsigned char ) info->ptr;
	375
	376	hashv = e2p_string2hash(arg);
	377	if (hashv < 0) {
	378	fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
	379	return EINVAL;
	380	}
	381	*p = hashv;
	382	return 0;
	383	}
	384
08fd3f36 TT	385	static errcode_t parse_bmap(struct field_set_info info, char arg)
	386	{
	387	unsigned long num;
	388	blk_t blk;
	389	errcode_t retval;
	390	char *tmp;
	391
	392	num = strtoul(arg, &tmp, 0);
	393	if (*tmp) {
	394	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	395	arg, info->name);
	396	return EINVAL;
	397	}
	398	blk = num;
	399
efc6f628	400	retval = ext2fs_bmap(current_fs, set_ino, &set_inode, 0, BMAP_SET,
08fd3f36 TT	401	array_idx, &blk);
	402	if (retval) {
	403	com_err("set_inode", retval, "while setting block map");
	404	}
619a8ea7	405	return retval;
08fd3f36 TT	406	}
08fd3f36 TT	407
cf96ecf1 AD	408	static errcode_t parse_gd_csum(struct field_set_info info, char arg)
	409	{
	410
	411	if (strcmp(arg, "calc") == 0) {
	412	ext2fs_group_desc_csum_set(current_fs, set_bg);
	413	set_gd = current_fs->group_desc[set_bg];
efc6f628	414	printf("Checksum set to 0x%04x\n",
cf96ecf1 AD	415	current_fs->group_desc[set_bg].bg_checksum);
	416	return 0;
	417	}
	418
	419	return parse_uint(info, arg);
	420	}
f61fc0b5	421
7dec050a	422	static void print_possible_fields(struct field_set_info *fields)
6e96adcb	423	{
7dec050a TT	424	struct field_set_info *ss;
	425	const char type, cmd;
	426	FILE *f;
08fd3f36	427	char name[40], idx[40];
6e96adcb	428
7dec050a TT	429	if (fields == super_fields) {
	430	type = "Superblock";
	431	cmd = "set_super_value";
c7c1209e	432	} else if (fields == inode_fields) {
7dec050a TT	433	type = "Inode";
7dec050a TT	434	cmd = "set_inode";
c7c1209e TT	435	} else {
	436	type = "Block group descriptor";
	437	cmd = "set_block_group";
7dec050a TT	438	}
	439	f = open_pager();
	440
	441	fprintf(f, "%s fields supported by the %s command:\n", type, cmd);
	442
	443	for (ss = fields ; ss->name ; ss++) {
6e96adcb TT	444	type = "unknown";
	445	if (ss->func == parse_string)
	446	type = "string";
	447	else if (ss->func == parse_int)
	448	type = "integer";
	449	else if (ss->func == parse_uint)
	450	type = "unsigned integer";
f61fc0b5 TT	451	else if (ss->func == parse_uuid)
	452	type = "UUID";
	453	else if (ss->func == parse_hashalg)
	454	type = "hash algorithm";
7dec050a TT	455	else if (ss->func == parse_time)
7dec050a TT	456	type = "date/time";
1d3a9511 TT	457	else if (ss->func == parse_bmap)
1d3a9511 TT	458	type = "set physical->logical block map";
08fd3f36 TT	459	strcpy(name, ss->name);
08fd3f36 TT	460	if (ss->flags & FLAG_ARRAY) {
efc6f628	461	if (ss->max_idx > 0)
08fd3f36 TT	462	sprintf(idx, "[%d]", ss->max_idx);
	463	else
	464	strcpy(idx, "[]");
	465	strcat(name, idx);
	466	}
	467	fprintf(f, "\t%-20s\t%s\n", name, type);
6e96adcb	468	}
7dec050a	469	close_pager(f);
6e96adcb TT	470	}
	471
	472
c6bd0c97 TT	473	void do_set_super(int argc, char *argv[])
c6bd0c97 TT	474	{
e1018eea TT	475	const char *usage = "<field> <value>\n"
	476	"\t\"set_super_value -l\" will list the names of "
	477	"superblock fields\n\twhich can be set.";
7dec050a	478	static struct field_set_info *ss;
efc6f628	479
6e96adcb	480	if ((argc == 2) && !strcmp(argv[1], "-l")) {
7dec050a	481	print_possible_fields(super_fields);
6e96adcb TT	482	return;
	483	}
	484
e1018eea TT	485	if (common_args_process(argc, argv, 3, 3, "set_super_value",
e1018eea TT	486	usage, CHECK_FS_RW))
c6bd0c97 TT	487	return;
c6bd0c97 TT	488
7dec050a	489	if ((ss = find_field(super_fields, argv[1])) == 0) {
c6bd0c97 TT	490	com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
	491	return;
	492	}
	493	set_sb = *current_fs->super;
	494	if (ss->func(ss, argv[2]) == 0) {
	495	*current_fs->super = set_sb;
	496	ext2fs_mark_super_dirty(current_fs);
	497	}
	498	}
7dec050a TT	499
	500	void do_set_inode(int argc, char *argv[])
	501	{
	502	const char *usage = "<inode> <field> <value>\n"
1d3a9511	503	"\t\"set_inode_field -l\" will list the names of "
7dec050a TT	504	"the fields in an ext2 inode\n\twhich can be set.";
7dec050a TT	505	static struct field_set_info *ss;
efc6f628	506
7dec050a TT	507	if ((argc == 2) && !strcmp(argv[1], "-l")) {
	508	print_possible_fields(inode_fields);
	509	return;
	510	}
	511
	512	if (common_args_process(argc, argv, 4, 4, "set_inode",
	513	usage, CHECK_FS_RW))
	514	return;
	515
	516	if ((ss = find_field(inode_fields, argv[2])) == 0) {
	517	com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
	518	return;
	519	}
	520
08fd3f36 TT	521	set_ino = string_to_inode(argv[1]);
08fd3f36 TT	522	if (!set_ino)
7dec050a TT	523	return;
7dec050a TT	524
08fd3f36	525	if (debugfs_read_inode(set_ino, &set_inode, argv[1]))
7dec050a TT	526	return;
	527
	528	if (ss->func(ss, argv[3]) == 0) {
08fd3f36	529	if (debugfs_write_inode(set_ino, &set_inode, argv[1]))
7dec050a TT	530	return;
	531	}
	532	}
c7c1209e TT	533
	534	void do_set_block_group_descriptor(int argc, char *argv[])
	535	{
	536	const char *usage = "<bg number> <field> <value>\n"
	537	"\t\"set_block_group_descriptor -l\" will list the names of "
	538	"the fields in a block group descriptor\n\twhich can be set.";
	539	struct field_set_info *ss;
c7c1209e TT	540	char *end;
	541
	542	if ((argc == 2) && !strcmp(argv[1], "-l")) {
	543	print_possible_fields(ext2_bg_fields);
	544	return;
	545	}
	546
	547	if (common_args_process(argc, argv, 4, 4, "set_block_group_descriptor",
	548	usage, CHECK_FS_RW))
	549	return;
	550
	551	set_bg = strtoul(argv[1], &end, 0);
	552	if (*end) {
	553	com_err(argv[0], 0, "invalid block group number: %s", argv[1]);
	554	return;
	555	}
	556
	557	if (set_bg >= current_fs->group_desc_count) {
	558	com_err(argv[0], 0, "block group number too big: %d", set_bg);
	559	return;
	560	}
	561
	562
	563	if ((ss = find_field(ext2_bg_fields, argv[2])) == 0) {
	564	com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
	565	return;
	566	}
	567
	568	set_gd = current_fs->group_desc[set_bg];
	569
	570	if (ss->func(ss, argv[3]) == 0) {
	571	current_fs->group_desc[set_bg] = set_gd;
	572	ext2fs_mark_super_dirty(current_fs);
	573	}
	574	}