Changeset 3949e8a0 in mainline for uspace/lib/ext2/libext2.h
- Timestamp:
- 2011-02-14T21:35:32Z (14 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 1d6f507
- Parents:
- f6fa2c2
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
uspace/lib/ext2/libext2.h
rf6fa2c2 r3949e8a0 37 37 #define LIBEXT2_LIBEXT2_H_ 38 38 39 #include <byteorder.h> 40 #include <libblock.h> 41 42 typedef struct ext2_superblock { 43 uint32_t total_inode_count; // Total number of inodes 44 uint32_t total_block_count; // Total number of blocks 45 uint32_t reserved_block_count; // Total number of reserved blocks 46 uint32_t free_block_count; // Total number of free blocks 47 uint32_t free_inode_count; // Total number of free inodes 48 uint32_t first_block; // Block containing the superblock (either 0 or 1) 49 uint32_t block_size_log2; // log_2(block_size) 50 int32_t fragment_size_log2; // log_2(fragment size) 51 uint32_t blocks_per_group; // Number of blocks in one block group 52 uint32_t fragments_per_group; // Number of fragments per block group 53 uint32_t inodes_per_group; // Number of inodes per block group 54 uint8_t unused2[12]; 55 uint16_t magic; // Magic value 56 uint16_t state; // State (mounted/unmounted) 57 uint16_t error_behavior; // What to do when errors are encountered 58 uint16_t rev_minor; // Minor revision level 59 uint8_t unused3[8]; 60 uint32_t os; // OS that created the filesystem 61 uint32_t rev_major; // Major revision level 62 uint8_t unused4[4]; 63 64 // Following is for ext2 revision 1 only 65 uint32_t first_inode; 66 uint16_t inode_size; 67 uint8_t unused5[14]; 68 uint8_t uuid[16]; // UUID TODO: Create a library for UUIDs 69 uint8_t volume_name[16]; 70 71 // TODO: add __attribute__((aligned(...)) for better performance? 72 // (it is necessary to ensure the superblock is correctly aligned then 73 // though) 74 } __attribute__ ((packed)) ext2_superblock_t; 75 76 77 typedef struct ext2_filesystem { 78 devmap_handle_t device; 79 ext2_superblock_t * superblock; 80 } ext2_filesystem_t; 81 82 #define EXT2_SUPERBLOCK_MAGIC 0xEF53 83 #define EXT2_SUPERBLOCK_SIZE 1024 84 #define EXT2_SUPERBLOCK_OFFSET 1024 85 #define EXT2_SUPERBLOCK_LAST_BYTE (EXT2_SUPERBLOCK_OFFSET + \ 86 EXT2_SUPERBLOCK_SIZE -1) 87 // allow maximum this block size 88 #define EXT2_MAX_BLOCK_SIZE 8096 89 #define EXT2_REV0_FIRST_INODE 11 90 #define EXT2_REV0_INODE_SIZE 128 91 92 inline uint16_t ext2_superblock_get_magic(ext2_superblock_t *); 93 inline uint32_t ext2_superblock_get_first_block(ext2_superblock_t *); 94 inline uint32_t ext2_superblock_get_block_size_log2(ext2_superblock_t *); 95 inline uint32_t ext2_superblock_get_block_size(ext2_superblock_t *); 96 inline int32_t ext2_superblock_get_fragment_size_log2(ext2_superblock_t *); 97 inline uint32_t ext2_superblock_get_fragment_size(ext2_superblock_t *); 98 inline uint32_t ext2_superblock_get_blocks_per_group(ext2_superblock_t *); 99 inline uint32_t ext2_superblock_get_fragments_per_group(ext2_superblock_t *); 100 inline uint16_t ext2_superblock_get_state(ext2_superblock_t *); 101 inline uint16_t ext2_superblock_get_rev_minor(ext2_superblock_t *); 102 inline uint32_t ext2_superblock_get_rev_major(ext2_superblock_t *); 103 inline uint32_t ext2_superblock_get_os(ext2_superblock_t *); 104 inline uint32_t ext2_superblock_get_first_inode(ext2_superblock_t *); 105 inline uint16_t ext2_superblock_get_inode_size(ext2_superblock_t *); 106 inline uint32_t ext2_superblock_get_total_inode_count(ext2_superblock_t *); 107 inline uint32_t ext2_superblock_get_total_block_count(ext2_superblock_t *); 108 inline uint32_t ext2_superblock_get_reserved_block_count(ext2_superblock_t *); 109 inline uint32_t ext2_superblock_get_free_block_count(ext2_superblock_t *); 110 inline uint32_t ext2_superblock_get_free_inode_count(ext2_superblock_t *); 111 112 extern int ext2_superblock_read_direct(devmap_handle_t, ext2_superblock_t **); 113 114 extern int ext2_filesystem_init(ext2_filesystem_t *, devmap_handle_t); 115 extern void ext2_filesystem_fini(ext2_filesystem_t *); 39 #include "libext2_superblock.h" 40 #include "libext2_filesystem.h" 116 41 117 42 #endif
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