Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 1 | /* |
| 2 | * set_fields.c --- set a superblock value |
| 3 | * |
| 4 | * Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o. |
| 5 | * |
| 6 | * %Begin-Header% |
| 7 | * This file may be redistributed under the terms of the GNU Public |
| 8 | * License. |
| 9 | * %End-Header% |
| 10 | */ |
| 11 | |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 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 |
Theodore Ts'o | 619a8ea | 2005-01-19 13:26:38 -0500 | [diff] [blame] | 19 | |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 20 | #include <stdio.h> |
| 21 | #include <unistd.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <ctype.h> |
| 24 | #include <string.h> |
Theodore Ts'o | 8192c63 | 2008-01-01 10:27:38 -0500 | [diff] [blame] | 25 | #include <strings.h> |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 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 |
| 32 | #include <fcntl.h> |
| 33 | #include <utime.h> |
| 34 | |
| 35 | #include "debugfs.h" |
| 36 | #include "uuid/uuid.h" |
| 37 | #include "e2p/e2p.h" |
| 38 | |
| 39 | static struct ext2_super_block set_sb; |
| 40 | static struct ext2_inode set_inode; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 41 | static struct ext2_group_desc set_gd; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 42 | static ext2_ino_t set_ino; |
| 43 | static int array_idx; |
| 44 | |
| 45 | #define FLAG_ARRAY 0x0001 |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 46 | |
| 47 | struct field_set_info { |
| 48 | const char *name; |
| 49 | void *ptr; |
| 50 | unsigned int size; |
| 51 | errcode_t (*func)(struct field_set_info *info, char *arg); |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 52 | int flags; |
| 53 | int max_idx; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | static errcode_t parse_uint(struct field_set_info *info, char *arg); |
| 57 | static errcode_t parse_int(struct field_set_info *info, char *arg); |
| 58 | static errcode_t parse_string(struct field_set_info *info, char *arg); |
| 59 | static errcode_t parse_uuid(struct field_set_info *info, char *arg); |
| 60 | static errcode_t parse_hashalg(struct field_set_info *info, char *arg); |
| 61 | static errcode_t parse_time(struct field_set_info *info, char *arg); |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 62 | static errcode_t parse_bmap(struct field_set_info *info, char *arg); |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 63 | |
| 64 | static struct field_set_info super_fields[] = { |
| 65 | { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint }, |
| 66 | { "blocks_count", &set_sb.s_blocks_count, 4, parse_uint }, |
| 67 | { "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint }, |
| 68 | { "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint }, |
| 69 | { "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint }, |
| 70 | { "first_data_block", &set_sb.s_first_data_block, 4, parse_uint }, |
| 71 | { "log_block_size", &set_sb.s_log_block_size, 4, parse_uint }, |
| 72 | { "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int }, |
| 73 | { "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint }, |
| 74 | { "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint }, |
| 75 | { "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint }, |
| 76 | { "mtime", &set_sb.s_mtime, 4, parse_time }, |
| 77 | { "wtime", &set_sb.s_wtime, 4, parse_time }, |
| 78 | { "mnt_count", &set_sb.s_mnt_count, 2, parse_uint }, |
| 79 | { "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int }, |
| 80 | /* s_magic */ |
| 81 | { "state", &set_sb.s_state, 2, parse_uint }, |
| 82 | { "errors", &set_sb.s_errors, 2, parse_uint }, |
| 83 | { "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint }, |
| 84 | { "lastcheck", &set_sb.s_lastcheck, 4, parse_time }, |
| 85 | { "checkinterval", &set_sb.s_checkinterval, 4, parse_uint }, |
| 86 | { "creator_os", &set_sb.s_creator_os, 4, parse_uint }, |
| 87 | { "rev_level", &set_sb.s_rev_level, 4, parse_uint }, |
| 88 | { "def_resuid", &set_sb.s_def_resuid, 2, parse_uint }, |
| 89 | { "def_resgid", &set_sb.s_def_resgid, 2, parse_uint }, |
| 90 | { "first_ino", &set_sb.s_first_ino, 4, parse_uint }, |
| 91 | { "inode_size", &set_sb.s_inode_size, 2, parse_uint }, |
| 92 | { "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint }, |
| 93 | { "feature_compat", &set_sb.s_feature_compat, 4, parse_uint }, |
| 94 | { "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint }, |
| 95 | { "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint }, |
| 96 | { "uuid", &set_sb.s_uuid, 16, parse_uuid }, |
| 97 | { "volume_name", &set_sb.s_volume_name, 16, parse_string }, |
| 98 | { "last_mounted", &set_sb.s_last_mounted, 64, parse_string }, |
| 99 | { "lastcheck", &set_sb.s_lastcheck, 4, parse_uint }, |
| 100 | { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap, |
| 101 | 4, parse_uint }, |
| 102 | { "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint }, |
| 103 | { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1, |
| 104 | parse_uint }, |
| 105 | { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2, |
| 106 | parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 107 | { "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid }, |
| 108 | { "journal_inum", &set_sb.s_journal_inum, 4, parse_uint }, |
| 109 | { "journal_dev", &set_sb.s_journal_dev, 4, parse_uint }, |
| 110 | { "last_orphan", &set_sb.s_last_orphan, 4, parse_uint }, |
| 111 | { "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid }, |
| 112 | { "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg }, |
| 113 | { "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint }, |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 114 | { "desc_size", &set_sb.s_desc_size, 2, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 115 | { "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint }, |
| 116 | { "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint }, |
| 117 | { "mkfs_time", &set_sb.s_mkfs_time, 4, parse_time }, |
Theodore Ts'o | 89c8015 | 2005-01-20 21:45:27 -0500 | [diff] [blame] | 118 | { "jnl_blocks", &set_sb.s_jnl_blocks[0], 4, parse_uint, FLAG_ARRAY, |
| 119 | 17 }, |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 120 | { "blocks_count_hi", &set_sb.s_blocks_count_hi, 4, parse_uint }, |
| 121 | { "r_blocks_count_hi", &set_sb.s_r_blocks_count_hi, 4, parse_uint }, |
| 122 | { "min_extra_isize", &set_sb.s_min_extra_isize, 2, parse_uint }, |
| 123 | { "want_extra_isize", &set_sb.s_want_extra_isize, 2, parse_uint }, |
Theodore Ts'o | f77704e | 2006-11-11 22:32:35 -0500 | [diff] [blame] | 124 | { "flags", &set_sb.s_flags, 4, parse_uint }, |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 125 | { "raid_stride", &set_sb.s_raid_stride, 2, parse_uint }, |
| 126 | { "min_extra_isize", &set_sb.s_min_extra_isize, 4, parse_uint }, |
| 127 | { "mmp_interval", &set_sb.s_mmp_interval, 2, parse_uint }, |
| 128 | { "mmp_block", &set_sb.s_mmp_block, 8, parse_uint }, |
| 129 | { "raid_stripe_width", &set_sb.s_raid_stripe_width, 4, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 130 | { 0, 0, 0, 0 } |
| 131 | }; |
| 132 | |
| 133 | static struct field_set_info inode_fields[] = { |
| 134 | { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint }, |
| 135 | { "mode", &set_inode.i_mode, 2, parse_uint }, |
| 136 | { "uid", &set_inode.i_uid, 2, parse_uint }, |
Theodore Ts'o | 38d732b | 2005-09-06 05:42:44 -0400 | [diff] [blame] | 137 | { "size", &set_inode.i_size, 4, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 138 | { "atime", &set_inode.i_atime, 4, parse_time }, |
| 139 | { "ctime", &set_inode.i_ctime, 4, parse_time }, |
| 140 | { "mtime", &set_inode.i_mtime, 4, parse_time }, |
| 141 | { "dtime", &set_inode.i_dtime, 4, parse_time }, |
| 142 | { "gid", &set_inode.i_gid, 2, parse_uint }, |
| 143 | { "links_count", &set_inode.i_links_count, 2, parse_uint }, |
| 144 | { "blocks", &set_inode.i_blocks, 4, parse_uint }, |
| 145 | { "flags", &set_inode.i_flags, 4, parse_uint }, |
Theodore Ts'o | d362a3f | 2007-04-19 01:53:53 -0400 | [diff] [blame] | 146 | { "version", &set_inode.osd1.linux1.l_i_version, 4, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 147 | { "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint }, |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 148 | { "block", &set_inode.i_block[0], 4, parse_uint, FLAG_ARRAY, |
| 149 | EXT2_NDIR_BLOCKS }, |
| 150 | { "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], 4, parse_uint }, |
| 151 | { "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], 4, parse_uint }, |
| 152 | { "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], 4, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 153 | { "generation", &set_inode.i_generation, 4, parse_uint }, |
| 154 | { "file_acl", &set_inode.i_file_acl, 4, parse_uint }, |
| 155 | { "dir_acl", &set_inode.i_dir_acl, 4, parse_uint }, |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 156 | { "size_high", &set_inode.i_size_high, 4, parse_uint }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 157 | { "faddr", &set_inode.i_faddr, 4, parse_uint }, |
Theodore Ts'o | 5d17119 | 2006-11-11 06:32:03 -0500 | [diff] [blame] | 158 | { "blocks_hi", &set_inode.osd2.linux2.l_i_blocks_hi, 2, parse_uint }, |
| 159 | { "frag", &set_inode.osd2.hurd2.h_i_frag, 1, parse_uint }, |
| 160 | { "fsize", &set_inode.osd2.hurd2.h_i_fsize, 1, parse_uint }, |
Theodore Ts'o | caf037a | 2005-07-04 12:24:40 -0500 | [diff] [blame] | 161 | { "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 2, parse_uint }, |
| 162 | { "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 2, parse_uint }, |
| 163 | { "author", &set_inode.osd2.hurd2.h_i_author, 4, parse_uint }, |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 164 | { "bmap", NULL, 4, parse_bmap, FLAG_ARRAY }, |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 165 | { 0, 0, 0, 0 } |
| 166 | }; |
| 167 | |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 168 | static struct field_set_info ext2_bg_fields[] = { |
| 169 | { "block_bitmap", &set_gd.bg_block_bitmap, 4, parse_uint }, |
| 170 | { "inode_bitmap", &set_gd.bg_inode_bitmap, 4, parse_uint }, |
| 171 | { "inode_table", &set_gd.bg_inode_table, 4, parse_uint }, |
| 172 | { "free_blocks_count", &set_gd.bg_free_blocks_count, 2, parse_uint }, |
| 173 | { "free_inodes_count", &set_gd.bg_free_inodes_count, 2, parse_uint }, |
| 174 | { "used_dirs_count", &set_gd.bg_used_dirs_count, 2, parse_uint }, |
| 175 | { "flags", &set_gd.bg_flags, 2, parse_uint }, |
| 176 | { "reserved", &set_gd.bg_reserved, 2, parse_uint, FLAG_ARRAY, 2 }, |
| 177 | { "itable_unused", &set_gd.bg_itable_unused, 2, parse_uint }, |
| 178 | { "checksum", &set_gd.bg_checksum, 2, parse_uint }, |
| 179 | { 0, 0, 0, 0 } |
| 180 | }; |
| 181 | |
| 182 | |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 183 | static struct field_set_info *find_field(struct field_set_info *fields, |
| 184 | char *field) |
| 185 | { |
| 186 | struct field_set_info *ss; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 187 | const char *prefix; |
| 188 | char *arg, *delim, *idx, *tmp; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 189 | int prefix_len; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 190 | |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 191 | if (fields == super_fields) |
| 192 | prefix = "s_"; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 193 | else if (fields == inode_fields) |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 194 | prefix = "i_"; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 195 | else |
| 196 | prefix = "bg_"; |
| 197 | prefix_len = strlen(prefix); |
| 198 | if (strncmp(field, prefix, prefix_len) == 0) |
| 199 | field += prefix_len; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 200 | |
| 201 | arg = malloc(strlen(field)+1); |
| 202 | if (!arg) |
| 203 | return NULL; |
| 204 | strcpy(arg, field); |
| 205 | |
| 206 | idx = strchr(arg, '['); |
| 207 | if (idx) { |
| 208 | *idx++ = 0; |
| 209 | delim = idx + strlen(idx) - 1; |
| 210 | if (!*idx || *delim != ']') |
| 211 | idx = 0; |
| 212 | else |
| 213 | *delim = 0; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 214 | } |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 215 | /* |
| 216 | * Can we parse the number? |
| 217 | */ |
| 218 | if (idx) { |
| 219 | array_idx = strtol(idx, &tmp, 0); |
| 220 | if (*tmp) |
| 221 | idx = 0; |
| 222 | } |
| 223 | |
| 224 | for (ss = fields ; ss->name ; ss++) { |
| 225 | if (ss->flags & FLAG_ARRAY) { |
| 226 | if (!idx || (strcmp(ss->name, arg) != 0)) |
| 227 | continue; |
| 228 | if (ss->max_idx > 0 && array_idx >= ss->max_idx) |
| 229 | continue; |
| 230 | } else { |
| 231 | if (strcmp(ss->name, field) != 0) |
| 232 | continue; |
| 233 | } |
| 234 | return ss; |
| 235 | } |
| 236 | |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 237 | return NULL; |
| 238 | } |
| 239 | |
| 240 | static errcode_t parse_uint(struct field_set_info *info, char *arg) |
| 241 | { |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 242 | unsigned long long num, limit; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 243 | char *tmp; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 244 | union { |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 245 | __u64 *ptr64; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 246 | __u32 *ptr32; |
| 247 | __u16 *ptr16; |
| 248 | __u8 *ptr8; |
| 249 | } u; |
| 250 | |
| 251 | u.ptr8 = (__u8 *) info->ptr; |
| 252 | if (info->flags & FLAG_ARRAY) |
| 253 | u.ptr8 += array_idx * info->size; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 254 | |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 255 | errno = 0; |
| 256 | num = STRTOULL(arg, &tmp, 0); |
| 257 | if (*tmp || errno) { |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 258 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", |
| 259 | arg, info->name); |
| 260 | return EINVAL; |
| 261 | } |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 262 | limit = ~0ULL >> ((8 - info->size) * 8); |
| 263 | if (num > limit) { |
| 264 | fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n", |
| 265 | arg, info->name, limit); |
| 266 | return EINVAL; |
| 267 | } |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 268 | switch (info->size) { |
Theodore Ts'o | 007df86 | 2008-02-18 22:16:52 -0500 | [diff] [blame] | 269 | case 8: |
| 270 | *u.ptr64 = num; |
| 271 | break; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 272 | case 4: |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 273 | *u.ptr32 = num; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 274 | break; |
| 275 | case 2: |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 276 | *u.ptr16 = num; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 277 | break; |
| 278 | case 1: |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 279 | *u.ptr8 = num; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 280 | break; |
| 281 | } |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static errcode_t parse_int(struct field_set_info *info, char *arg) |
| 286 | { |
| 287 | long num; |
| 288 | char *tmp; |
| 289 | __s32 *ptr32; |
| 290 | __s16 *ptr16; |
| 291 | __s8 *ptr8; |
| 292 | |
| 293 | num = strtol(arg, &tmp, 0); |
| 294 | if (*tmp) { |
| 295 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", |
| 296 | arg, info->name); |
| 297 | return EINVAL; |
| 298 | } |
| 299 | switch (info->size) { |
| 300 | case 4: |
| 301 | ptr32 = (__s32 *) info->ptr; |
| 302 | *ptr32 = num; |
| 303 | break; |
| 304 | case 2: |
| 305 | ptr16 = (__s16 *) info->ptr; |
| 306 | *ptr16 = num; |
| 307 | break; |
| 308 | case 1: |
| 309 | ptr8 = (__s8 *) info->ptr; |
| 310 | *ptr8 = num; |
| 311 | break; |
| 312 | } |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | static errcode_t parse_string(struct field_set_info *info, char *arg) |
| 317 | { |
| 318 | char *cp = (char *) info->ptr; |
| 319 | |
| 320 | if (strlen(arg) >= info->size) { |
| 321 | fprintf(stderr, "Error maximum size for %s is %d.\n", |
| 322 | info->name, info->size); |
| 323 | return EINVAL; |
| 324 | } |
| 325 | strcpy(cp, arg); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static errcode_t parse_time(struct field_set_info *info, char *arg) |
| 330 | { |
Theodore Ts'o | e3e9253 | 2006-05-21 19:26:06 -0400 | [diff] [blame] | 331 | time_t t; |
| 332 | __u32 *ptr32; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 333 | |
| 334 | ptr32 = (__u32 *) info->ptr; |
| 335 | |
Theodore Ts'o | 4efae60 | 2005-09-24 21:56:38 -0400 | [diff] [blame] | 336 | t = string_to_time(arg); |
| 337 | |
| 338 | if (t == ((time_t) -1)) { |
| 339 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", |
| 340 | arg, info->name); |
| 341 | return EINVAL; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 342 | } |
Theodore Ts'o | 4efae60 | 2005-09-24 21:56:38 -0400 | [diff] [blame] | 343 | *ptr32 = t; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | static errcode_t parse_uuid(struct field_set_info *info, char *arg) |
| 348 | { |
| 349 | unsigned char * p = (unsigned char *) info->ptr; |
| 350 | |
| 351 | if ((strcasecmp(arg, "null") == 0) || |
| 352 | (strcasecmp(arg, "clear") == 0)) { |
| 353 | uuid_clear(p); |
| 354 | } else if (strcasecmp(arg, "time") == 0) { |
| 355 | uuid_generate_time(p); |
| 356 | } else if (strcasecmp(arg, "random") == 0) { |
| 357 | uuid_generate(p); |
| 358 | } else if (uuid_parse(arg, p)) { |
| 359 | fprintf(stderr, "Invalid UUID format: %s\n", arg); |
| 360 | return EINVAL; |
| 361 | } |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | static errcode_t parse_hashalg(struct field_set_info *info, char *arg) |
| 366 | { |
| 367 | int hashv; |
| 368 | unsigned char *p = (unsigned char *) info->ptr; |
| 369 | |
| 370 | hashv = e2p_string2hash(arg); |
| 371 | if (hashv < 0) { |
| 372 | fprintf(stderr, "Invalid hash algorithm: %s\n", arg); |
| 373 | return EINVAL; |
| 374 | } |
| 375 | *p = hashv; |
| 376 | return 0; |
| 377 | } |
| 378 | |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 379 | static errcode_t parse_bmap(struct field_set_info *info, char *arg) |
| 380 | { |
| 381 | unsigned long num; |
| 382 | blk_t blk; |
| 383 | errcode_t retval; |
| 384 | char *tmp; |
| 385 | |
| 386 | num = strtoul(arg, &tmp, 0); |
| 387 | if (*tmp) { |
| 388 | fprintf(stderr, "Couldn't parse '%s' for field %s.\n", |
| 389 | arg, info->name); |
| 390 | return EINVAL; |
| 391 | } |
| 392 | blk = num; |
| 393 | |
| 394 | retval = ext2fs_bmap(current_fs, set_ino, &set_inode, 0, BMAP_SET, |
| 395 | array_idx, &blk); |
| 396 | if (retval) { |
| 397 | com_err("set_inode", retval, "while setting block map"); |
| 398 | } |
Theodore Ts'o | 619a8ea | 2005-01-19 13:26:38 -0500 | [diff] [blame] | 399 | return retval; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 400 | } |
| 401 | |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 402 | |
| 403 | static void print_possible_fields(struct field_set_info *fields) |
| 404 | { |
| 405 | struct field_set_info *ss; |
| 406 | const char *type, *cmd; |
| 407 | FILE *f; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 408 | char name[40], idx[40]; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 409 | |
| 410 | if (fields == super_fields) { |
| 411 | type = "Superblock"; |
| 412 | cmd = "set_super_value"; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 413 | } else if (fields == inode_fields) { |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 414 | type = "Inode"; |
| 415 | cmd = "set_inode"; |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 416 | } else { |
| 417 | type = "Block group descriptor"; |
| 418 | cmd = "set_block_group"; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 419 | } |
| 420 | f = open_pager(); |
| 421 | |
| 422 | fprintf(f, "%s fields supported by the %s command:\n", type, cmd); |
| 423 | |
| 424 | for (ss = fields ; ss->name ; ss++) { |
| 425 | type = "unknown"; |
| 426 | if (ss->func == parse_string) |
| 427 | type = "string"; |
| 428 | else if (ss->func == parse_int) |
| 429 | type = "integer"; |
| 430 | else if (ss->func == parse_uint) |
| 431 | type = "unsigned integer"; |
| 432 | else if (ss->func == parse_uuid) |
| 433 | type = "UUID"; |
| 434 | else if (ss->func == parse_hashalg) |
| 435 | type = "hash algorithm"; |
| 436 | else if (ss->func == parse_time) |
| 437 | type = "date/time"; |
Theodore Ts'o | 1d3a951 | 2005-01-07 21:14:12 -0500 | [diff] [blame] | 438 | else if (ss->func == parse_bmap) |
| 439 | type = "set physical->logical block map"; |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 440 | strcpy(name, ss->name); |
| 441 | if (ss->flags & FLAG_ARRAY) { |
| 442 | if (ss->max_idx > 0) |
| 443 | sprintf(idx, "[%d]", ss->max_idx); |
| 444 | else |
| 445 | strcpy(idx, "[]"); |
| 446 | strcat(name, idx); |
| 447 | } |
| 448 | fprintf(f, "\t%-20s\t%s\n", name, type); |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 449 | } |
| 450 | close_pager(f); |
| 451 | } |
| 452 | |
| 453 | |
| 454 | void do_set_super(int argc, char *argv[]) |
| 455 | { |
| 456 | const char *usage = "<field> <value>\n" |
| 457 | "\t\"set_super_value -l\" will list the names of " |
| 458 | "superblock fields\n\twhich can be set."; |
| 459 | static struct field_set_info *ss; |
| 460 | |
| 461 | if ((argc == 2) && !strcmp(argv[1], "-l")) { |
| 462 | print_possible_fields(super_fields); |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | if (common_args_process(argc, argv, 3, 3, "set_super_value", |
| 467 | usage, CHECK_FS_RW)) |
| 468 | return; |
| 469 | |
| 470 | if ((ss = find_field(super_fields, argv[1])) == 0) { |
| 471 | com_err(argv[0], 0, "invalid field specifier: %s", argv[1]); |
| 472 | return; |
| 473 | } |
| 474 | set_sb = *current_fs->super; |
| 475 | if (ss->func(ss, argv[2]) == 0) { |
| 476 | *current_fs->super = set_sb; |
| 477 | ext2fs_mark_super_dirty(current_fs); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | void do_set_inode(int argc, char *argv[]) |
| 482 | { |
| 483 | const char *usage = "<inode> <field> <value>\n" |
Theodore Ts'o | 1d3a951 | 2005-01-07 21:14:12 -0500 | [diff] [blame] | 484 | "\t\"set_inode_field -l\" will list the names of " |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 485 | "the fields in an ext2 inode\n\twhich can be set."; |
| 486 | static struct field_set_info *ss; |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 487 | |
| 488 | if ((argc == 2) && !strcmp(argv[1], "-l")) { |
| 489 | print_possible_fields(inode_fields); |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | if (common_args_process(argc, argv, 4, 4, "set_inode", |
| 494 | usage, CHECK_FS_RW)) |
| 495 | return; |
| 496 | |
| 497 | if ((ss = find_field(inode_fields, argv[2])) == 0) { |
| 498 | com_err(argv[0], 0, "invalid field specifier: %s", argv[2]); |
| 499 | return; |
| 500 | } |
| 501 | |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 502 | set_ino = string_to_inode(argv[1]); |
| 503 | if (!set_ino) |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 504 | return; |
| 505 | |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 506 | if (debugfs_read_inode(set_ino, &set_inode, argv[1])) |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 507 | return; |
| 508 | |
| 509 | if (ss->func(ss, argv[3]) == 0) { |
Theodore Ts'o | 08fd3f3 | 2004-12-23 14:11:34 -0500 | [diff] [blame] | 510 | if (debugfs_write_inode(set_ino, &set_inode, argv[1])) |
Theodore Ts'o | 7dec050 | 2004-12-21 20:37:36 -0500 | [diff] [blame] | 511 | return; |
| 512 | } |
| 513 | } |
Theodore Ts'o | c7c1209 | 2007-04-13 15:56:00 -0400 | [diff] [blame] | 514 | |
| 515 | void do_set_block_group_descriptor(int argc, char *argv[]) |
| 516 | { |
| 517 | const char *usage = "<bg number> <field> <value>\n" |
| 518 | "\t\"set_block_group_descriptor -l\" will list the names of " |
| 519 | "the fields in a block group descriptor\n\twhich can be set."; |
| 520 | struct field_set_info *ss; |
| 521 | dgrp_t set_bg; |
| 522 | char *end; |
| 523 | |
| 524 | if ((argc == 2) && !strcmp(argv[1], "-l")) { |
| 525 | print_possible_fields(ext2_bg_fields); |
| 526 | return; |
| 527 | } |
| 528 | |
| 529 | if (common_args_process(argc, argv, 4, 4, "set_block_group_descriptor", |
| 530 | usage, CHECK_FS_RW)) |
| 531 | return; |
| 532 | |
| 533 | set_bg = strtoul(argv[1], &end, 0); |
| 534 | if (*end) { |
| 535 | com_err(argv[0], 0, "invalid block group number: %s", argv[1]); |
| 536 | return; |
| 537 | } |
| 538 | |
| 539 | if (set_bg >= current_fs->group_desc_count) { |
| 540 | com_err(argv[0], 0, "block group number too big: %d", set_bg); |
| 541 | return; |
| 542 | } |
| 543 | |
| 544 | |
| 545 | if ((ss = find_field(ext2_bg_fields, argv[2])) == 0) { |
| 546 | com_err(argv[0], 0, "invalid field specifier: %s", argv[2]); |
| 547 | return; |
| 548 | } |
| 549 | |
| 550 | set_gd = current_fs->group_desc[set_bg]; |
| 551 | |
| 552 | if (ss->func(ss, argv[3]) == 0) { |
| 553 | current_fs->group_desc[set_bg] = set_gd; |
| 554 | ext2fs_mark_super_dirty(current_fs); |
| 555 | } |
| 556 | } |