Colin Cross | 9a2b60b | 2014-01-23 13:13:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <errno.h> |
| 18 | |
| 19 | #include "ext4_sb.h" |
| 20 | |
| 21 | int ext4_parse_sb(struct ext4_super_block *sb, struct fs_info *info) |
| 22 | { |
| 23 | uint64_t len_blocks; |
| 24 | |
| 25 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
| 26 | return -EINVAL; |
| 27 | |
| 28 | if ((sb->s_state & EXT4_VALID_FS) != EXT4_VALID_FS) |
| 29 | return -EINVAL; |
| 30 | |
| 31 | info->block_size = 1024 << sb->s_log_block_size; |
| 32 | info->blocks_per_group = sb->s_blocks_per_group; |
| 33 | info->inodes_per_group = sb->s_inodes_per_group; |
| 34 | info->inode_size = sb->s_inode_size; |
| 35 | info->inodes = sb->s_inodes_count; |
| 36 | info->feat_ro_compat = sb->s_feature_ro_compat; |
| 37 | info->feat_compat = sb->s_feature_compat; |
| 38 | info->feat_incompat = sb->s_feature_incompat; |
| 39 | info->bg_desc_reserve_blocks = sb->s_reserved_gdt_blocks; |
| 40 | info->label = sb->s_volume_name; |
| 41 | |
| 42 | len_blocks = ((uint64_t)sb->s_blocks_count_hi << 32) + |
| 43 | sb->s_blocks_count_lo; |
| 44 | info->len = (uint64_t)info->block_size * len_blocks; |
| 45 | |
| 46 | return 0; |
| 47 | } |