Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 1 | /* |
| 2 | * initialize.c --- initialize a filesystem handle given superblock |
| 3 | * parameters. Used by mke2fs when initializing a filesystem. |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 1994, 1995, 1996 Theodore Ts'o. |
| 6 | * |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 7 | * %Begin-Header% |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 8 | * This file may be redistributed under the terms of the GNU Public |
| 9 | * License. |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 10 | * %End-Header% |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <string.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 15 | #if HAVE_UNISTD_H |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 16 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 17 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 18 | #include <fcntl.h> |
| 19 | #include <time.h> |
Theodore Ts'o | 1d2ff46 | 1997-10-19 23:00:21 +0000 | [diff] [blame] | 20 | #if HAVE_SYS_STAT_H |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 21 | #include <sys/stat.h> |
Theodore Ts'o | 1d2ff46 | 1997-10-19 23:00:21 +0000 | [diff] [blame] | 22 | #endif |
| 23 | #if HAVE_SYS_TYPES_H |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 24 | #include <sys/types.h> |
Theodore Ts'o | 1d2ff46 | 1997-10-19 23:00:21 +0000 | [diff] [blame] | 25 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 26 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 27 | #if EXT2_FLAT_INCLUDES |
| 28 | #include "ext2_fs.h" |
| 29 | #else |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 30 | #include <linux/ext2_fs.h> |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 31 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 32 | |
| 33 | #include "ext2fs.h" |
| 34 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 35 | #if defined(__linux__) && defined(EXT2_OS_LINUX) |
| 36 | #define CREATOR_OS EXT2_OS_LINUX |
| 37 | #elif defined(__gnu__) && defined(EXT2_OS_HURD) |
| 38 | #define CREATOR_OS EXT2_OS_HURD |
| 39 | #elif defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) |
| 40 | #define CREATOR_OS EXT2_OS_FREEBSD |
| 41 | #elif defined(LITES) && defined(EXT2_OS_LITES) |
| 42 | #define CREATOR_OS EXT2_OS_LITES |
| 43 | #else |
| 44 | #define CREATOR_OS EXT2_OS_LINUX /* by default */ |
| 45 | #endif |
| 46 | |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 47 | /* |
| 48 | * Note we override the kernel include file's idea of what the default |
| 49 | * check interval (never) should be. It's a good idea to check at |
| 50 | * least *occasionally*, specially since servers will never rarely get |
| 51 | * to reboot, since Linux is so robust these days. :-) |
| 52 | * |
| 53 | * 180 days (six months) seems like a good value. |
| 54 | */ |
| 55 | #ifdef EXT2_DFL_CHECKINTERVAL |
| 56 | #undef EXT2_DFL_CHECKINTERVAL |
| 57 | #endif |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 58 | #define EXT2_DFL_CHECKINTERVAL (86400L * 180L) |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 59 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 60 | errcode_t ext2fs_initialize(const char *name, int flags, |
| 61 | struct ext2_super_block *param, |
| 62 | io_manager manager, ext2_filsys *ret_fs) |
| 63 | { |
| 64 | ext2_filsys fs; |
| 65 | errcode_t retval; |
| 66 | struct ext2_super_block *super; |
| 67 | int frags_per_block; |
| 68 | int rem; |
| 69 | int overhead = 0; |
| 70 | blk_t group_block; |
| 71 | int i, j; |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 72 | blk_t numblocks; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 73 | char *buf; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 74 | |
| 75 | if (!param || !param->s_blocks_count) |
Theodore Ts'o | 1f0b6c1 | 1997-10-31 06:07:47 +0000 | [diff] [blame] | 76 | return EXT2_ET_INVALID_ARGUMENT; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 77 | |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 78 | retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), |
| 79 | (void **) &fs); |
| 80 | if (retval) |
| 81 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 82 | |
| 83 | memset(fs, 0, sizeof(struct struct_ext2_filsys)); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 84 | fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS; |
Theodore Ts'o | 1e3472c | 1997-04-29 14:53:37 +0000 | [diff] [blame] | 85 | fs->flags = flags | EXT2_FLAG_RW | ext2fs_native_flag(); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 86 | retval = manager->open(name, IO_FLAG_RW, &fs->io); |
| 87 | if (retval) |
| 88 | goto cleanup; |
Theodore Ts'o | e9affb7 | 1997-08-24 02:57:55 +0000 | [diff] [blame] | 89 | fs->io->app_data = fs; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 90 | retval = ext2fs_get_mem(strlen(name)+1, (void **) &fs->device_name); |
| 91 | if (retval) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 92 | goto cleanup; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 93 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 94 | strcpy(fs->device_name, name); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 95 | retval = ext2fs_get_mem(SUPERBLOCK_SIZE, (void **) &super); |
| 96 | if (retval) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 97 | goto cleanup; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 98 | fs->super = super; |
| 99 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 100 | memset(super, 0, SUPERBLOCK_SIZE); |
| 101 | |
| 102 | #define set_field(field, default) (super->field = param->field ? \ |
| 103 | param->field : (default)) |
| 104 | |
| 105 | super->s_magic = EXT2_SUPER_MAGIC; |
| 106 | super->s_state = EXT2_VALID_FS; |
| 107 | |
| 108 | set_field(s_log_block_size, 0); /* default blocksize: 1024 bytes */ |
| 109 | set_field(s_log_frag_size, 0); /* default fragsize: 1024 bytes */ |
| 110 | set_field(s_first_data_block, super->s_log_block_size ? 0 : 1); |
| 111 | set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT); |
| 112 | set_field(s_errors, EXT2_ERRORS_DEFAULT); |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 113 | #ifdef EXT2_DYNAMIC_REV |
| 114 | set_field(s_feature_compat, 0); |
| 115 | set_field(s_feature_incompat, 0); |
| 116 | set_field(s_feature_ro_compat, 0); |
| 117 | if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 118 | return EXT2_ET_UNSUPP_FEATURE; |
Theodore Ts'o | a29f4d3 | 1997-04-29 21:26:48 +0000 | [diff] [blame] | 119 | if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 120 | return EXT2_ET_RO_UNSUPP_FEATURE; |
Theodore Ts'o | 7f88b04 | 1997-04-26 14:48:50 +0000 | [diff] [blame] | 121 | |
Theodore Ts'o | 7f88b04 | 1997-04-26 14:48:50 +0000 | [diff] [blame] | 122 | set_field(s_rev_level, EXT2_GOOD_OLD_REV); |
| 123 | if (super->s_rev_level >= EXT2_DYNAMIC_REV) { |
| 124 | set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO); |
| 125 | set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE); |
| 126 | } |
| 127 | #endif |
| 128 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 129 | set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL); |
| 130 | super->s_lastcheck = time(NULL); |
| 131 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 132 | super->s_creator_os = CREATOR_OS; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 133 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 134 | fs->blocksize = EXT2_BLOCK_SIZE(super); |
| 135 | fs->fragsize = EXT2_FRAG_SIZE(super); |
| 136 | frags_per_block = fs->blocksize / fs->fragsize; |
| 137 | |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 138 | /* default: (fs->blocksize*8) blocks/group */ |
| 139 | set_field(s_blocks_per_group, fs->blocksize*8); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 140 | super->s_frags_per_group = super->s_blocks_per_group * frags_per_block; |
| 141 | |
| 142 | super->s_blocks_count = param->s_blocks_count; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 143 | super->s_r_blocks_count = param->s_r_blocks_count; |
| 144 | if (super->s_r_blocks_count >= param->s_blocks_count) { |
Theodore Ts'o | 1f0b6c1 | 1997-10-31 06:07:47 +0000 | [diff] [blame] | 145 | retval = EXT2_ET_INVALID_ARGUMENT; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 146 | goto cleanup; |
| 147 | } |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 148 | |
| 149 | retry: |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 150 | fs->group_desc_count = (super->s_blocks_count - |
| 151 | super->s_first_data_block + |
| 152 | EXT2_BLOCKS_PER_GROUP(super) - 1) |
| 153 | / EXT2_BLOCKS_PER_GROUP(super); |
Theodore Ts'o | 7f88b04 | 1997-04-26 14:48:50 +0000 | [diff] [blame] | 154 | if (fs->group_desc_count == 0) |
| 155 | return EXT2_ET_TOOSMALL; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 156 | fs->desc_blocks = (fs->group_desc_count + |
| 157 | EXT2_DESC_PER_BLOCK(super) - 1) |
| 158 | / EXT2_DESC_PER_BLOCK(super); |
| 159 | |
Theodore Ts'o | 353952d | 1998-05-01 05:32:18 +0000 | [diff] [blame] | 160 | /* n.b., fs->blocksize is <= 4096 */ |
| 161 | set_field(s_inodes_count, super->s_blocks_count/(4096/fs->blocksize)); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 162 | |
| 163 | /* |
Theodore Ts'o | 8d7e83b | 1998-09-23 00:27:26 +0000 | [diff] [blame] | 164 | * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so |
| 165 | * that we have enough inodes for the filesystem(!) |
| 166 | */ |
Theodore Ts'o | 7a46952 | 1999-01-04 08:50:59 +0000 | [diff] [blame^] | 167 | if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1) |
| 168 | super->s_inodes_count = EXT2_FIRST_INODE(super)+1; |
Theodore Ts'o | 8d7e83b | 1998-09-23 00:27:26 +0000 | [diff] [blame] | 169 | |
| 170 | /* |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 171 | * There should be at least as many inodes as the user |
| 172 | * requested. Figure out how many inodes per group that |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 173 | * should be. But make sure that we don't allocate more than |
| 174 | * one bitmap's worth of inodes |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 175 | */ |
| 176 | super->s_inodes_per_group = (super->s_inodes_count + |
| 177 | fs->group_desc_count - 1) / |
| 178 | fs->group_desc_count; |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 179 | if (super->s_inodes_per_group > fs->blocksize*8) |
| 180 | super->s_inodes_per_group = fs->blocksize*8; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 181 | |
| 182 | /* |
| 183 | * Make sure the number of inodes per group completely fills |
| 184 | * the inode table blocks in the descriptor. If not, add some |
| 185 | * additional inodes/group. Waste not, want not... |
| 186 | */ |
Theodore Ts'o | 7f88b04 | 1997-04-26 14:48:50 +0000 | [diff] [blame] | 187 | fs->inode_blocks_per_group = (((super->s_inodes_per_group * |
| 188 | EXT2_INODE_SIZE(super)) + |
| 189 | EXT2_BLOCK_SIZE(super) - 1) / |
| 190 | EXT2_BLOCK_SIZE(super)); |
| 191 | super->s_inodes_per_group = ((fs->inode_blocks_per_group * |
| 192 | EXT2_BLOCK_SIZE(super)) / |
| 193 | EXT2_INODE_SIZE(super)); |
| 194 | /* |
| 195 | * Finally, make sure the number of inodes per group is a |
| 196 | * multiple of 8. This is needed to simplify the bitmap |
| 197 | * splicing code. |
| 198 | */ |
| 199 | super->s_inodes_per_group &= ~7; |
| 200 | fs->inode_blocks_per_group = (((super->s_inodes_per_group * |
| 201 | EXT2_INODE_SIZE(super)) + |
| 202 | EXT2_BLOCK_SIZE(super) - 1) / |
| 203 | EXT2_BLOCK_SIZE(super)); |
| 204 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 205 | /* |
| 206 | * adjust inode count to reflect the adjusted inodes_per_group |
| 207 | */ |
| 208 | super->s_inodes_count = super->s_inodes_per_group * |
| 209 | fs->group_desc_count; |
| 210 | super->s_free_inodes_count = super->s_inodes_count; |
| 211 | |
| 212 | /* |
Theodore Ts'o | 2ecc6fe | 1997-04-29 17:57:00 +0000 | [diff] [blame] | 213 | * Overhead is the number of bookkeeping blocks per group. It |
| 214 | * includes the superblock backup, the group descriptor |
| 215 | * backups, the inode bitmap, the block bitmap, and the inode |
| 216 | * table. |
| 217 | * |
| 218 | * XXX Not all block groups need the descriptor blocks, but |
| 219 | * being clever is tricky... |
| 220 | */ |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 221 | overhead = (int) (3 + fs->desc_blocks + fs->inode_blocks_per_group); |
Theodore Ts'o | 2ecc6fe | 1997-04-29 17:57:00 +0000 | [diff] [blame] | 222 | |
| 223 | /* |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 224 | * See if the last group is big enough to support the |
| 225 | * necessary data structures. If not, we need to get rid of |
| 226 | * it. |
| 227 | */ |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 228 | rem = (int) ((super->s_blocks_count - super->s_first_data_block) % |
| 229 | super->s_blocks_per_group); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 230 | if ((fs->group_desc_count == 1) && rem && (rem < overhead)) |
| 231 | return EXT2_ET_TOOSMALL; |
| 232 | if (rem && (rem < overhead+50)) { |
| 233 | super->s_blocks_count -= rem; |
| 234 | goto retry; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * At this point we know how big the filesystem will be. So |
| 239 | * we can do any and all allocations that depend on the block |
| 240 | * count. |
| 241 | */ |
| 242 | |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 243 | retval = ext2fs_get_mem(strlen(fs->device_name) + 80, |
| 244 | (void **) &buf); |
| 245 | if (retval) |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 246 | goto cleanup; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 247 | |
| 248 | sprintf(buf, "block bitmap for %s", fs->device_name); |
| 249 | retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 250 | if (retval) |
| 251 | goto cleanup; |
| 252 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 253 | sprintf(buf, "inode bitmap for %s", fs->device_name); |
Theodore Ts'o | 5c57647 | 1997-04-29 15:29:49 +0000 | [diff] [blame] | 254 | retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 255 | if (retval) |
| 256 | goto cleanup; |
| 257 | |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 258 | ext2fs_free_mem((void **) &buf); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 259 | |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 260 | retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize, |
| 261 | (void **) &fs->group_desc); |
| 262 | if (retval) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 263 | goto cleanup; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 264 | |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 265 | memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 266 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 267 | /* |
| 268 | * Reserve the superblock and group descriptors for each |
| 269 | * group, and fill in the correct group statistics for group. |
| 270 | * Note that although the block bitmap, inode bitmap, and |
| 271 | * inode table have not been allocated (and in fact won't be |
| 272 | * by this routine), they are accounted for nevertheless. |
| 273 | */ |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 274 | group_block = super->s_first_data_block; |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 275 | super->s_free_blocks_count = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 276 | for (i = 0; i < fs->group_desc_count; i++) { |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 277 | if (i == fs->group_desc_count-1) { |
| 278 | numblocks = (fs->super->s_blocks_count - |
| 279 | fs->super->s_first_data_block) % |
| 280 | fs->super->s_blocks_per_group; |
| 281 | if (!numblocks) |
| 282 | numblocks = fs->super->s_blocks_per_group; |
| 283 | } else |
| 284 | numblocks = fs->super->s_blocks_per_group; |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 285 | |
| 286 | if (ext2fs_bg_has_super(fs, i)) { |
| 287 | for (j=0; j < fs->desc_blocks+1; j++) |
| 288 | ext2fs_mark_block_bitmap(fs->block_map, |
| 289 | group_block + j); |
| 290 | numblocks -= 1 + fs->desc_blocks; |
| 291 | } |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 292 | |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 293 | numblocks -= 2 + fs->inode_blocks_per_group; |
| 294 | |
| 295 | super->s_free_blocks_count += numblocks; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 296 | fs->group_desc[i].bg_free_blocks_count = numblocks; |
| 297 | fs->group_desc[i].bg_free_inodes_count = |
| 298 | fs->super->s_inodes_per_group; |
| 299 | fs->group_desc[i].bg_used_dirs_count = 0; |
| 300 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 301 | group_block += super->s_blocks_per_group; |
| 302 | } |
| 303 | |
| 304 | ext2fs_mark_super_dirty(fs); |
| 305 | ext2fs_mark_bb_dirty(fs); |
| 306 | ext2fs_mark_ib_dirty(fs); |
| 307 | |
| 308 | io_channel_set_blksize(fs->io, fs->blocksize); |
| 309 | |
| 310 | *ret_fs = fs; |
| 311 | return 0; |
| 312 | cleanup: |
| 313 | ext2fs_free(fs); |
| 314 | return retval; |
| 315 | } |
| 316 | |
| 317 | |
| 318 | |