| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Sucha
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libext2
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBEXT2_LIBEXT2_INODE_H_
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| 37 | #define LIBEXT2_LIBEXT2_INODE_H_
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| 38 |
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| 39 | #include <libblock.h>
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| 40 | #include "libext2_superblock.h"
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| 41 |
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| 42 | typedef struct ext2_inode {
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| 43 | uint16_t mode;
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| 44 | uint16_t user_id;
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| 45 | uint32_t size;
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| 46 | uint8_t unused[16];
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| 47 | uint16_t group_id;
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| 48 | uint16_t usage_count; // Hard link count, when 0 the inode is to be freed
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| 49 | uint32_t reserved_512_blocks; // Size of this inode in 512-byte blocks
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| 50 | uint32_t flags;
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| 51 | uint8_t unused2[4];
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| 52 | uint32_t direct_blocks[12]; // Direct block ids stored in this inode
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| 53 | uint32_t indirect_blocks[3];
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| 54 | uint32_t version;
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| 55 | uint32_t file_acl;
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| 56 | union {
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| 57 | uint32_t dir_acl;
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| 58 | uint32_t size_high; // For regular files in version >= 1
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| 59 | } __attribute__ ((packed));
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| 60 | uint8_t unused3[6];
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| 61 | uint16_t mode_high; // Hurd only
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| 62 | uint16_t user_id_high; // Linux/Hurd only
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| 63 | uint16_t group_id_high; // Linux/Hurd only
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| 64 | } __attribute__ ((packed)) ext2_inode_t;
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| 65 |
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| 66 | #define EXT2_INODE_MODE_FIFO 0x1000
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| 67 | #define EXT2_INODE_MODE_CHARDEV 0x2000
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| 68 | #define EXT2_INODE_MODE_DIRECTORY 0x4000
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| 69 | #define EXT2_INODE_MODE_BLOCKDEV 0x6000
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| 70 | #define EXT2_INODE_MODE_FILE 0x8000
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| 71 | #define EXT2_INODE_MODE_SOFTLINK 0xA000
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| 72 | #define EXT2_INODE_MODE_SOCKET 0xC000
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| 73 | #define EXT2_INODE_MODE_ACCESS_MASK 0x0FFF
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| 74 | #define EXT2_INODE_MODE_TYPE_MASK 0xF000
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| 75 | #define EXT2_INODE_DIRECT_BLOCKS 12
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| 76 |
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| 77 | #define EXT2_INODE_ROOT_INDEX 2
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| 78 |
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| 79 | typedef struct ext2_inode_ref {
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| 80 | block_t *block; // Reference to a block containing this inode
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| 81 | ext2_inode_t *inode;
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| 82 | uint32_t index; // Index number of this inode
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| 83 | } ext2_inode_ref_t;
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| 84 |
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| 85 | extern uint32_t ext2_inode_get_mode(ext2_superblock_t *, ext2_inode_t *);
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| 86 | extern bool ext2_inode_is_type(ext2_superblock_t *, ext2_inode_t *, uint32_t);
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| 87 | extern uint32_t ext2_inode_get_user_id(ext2_superblock_t *, ext2_inode_t *);
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| 88 | extern uint64_t ext2_inode_get_size(ext2_superblock_t *, ext2_inode_t *);
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| 89 | extern uint32_t ext2_inode_get_group_id(ext2_superblock_t *, ext2_inode_t *);
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| 90 | extern uint16_t ext2_inode_get_usage_count(ext2_inode_t *);
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| 91 | extern uint32_t ext2_inode_get_reserved_512_blocks(ext2_inode_t *);
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| 92 | extern uint32_t ext2_inode_get_reserved_blocks(ext2_superblock_t *,
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| 93 | ext2_inode_t *);
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| 94 | extern uint32_t ext2_inode_get_flags(ext2_inode_t *);
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| 95 | extern uint32_t ext2_inode_get_direct_block(ext2_inode_t *, uint8_t);
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| 96 | extern uint32_t ext2_inode_get_indirect_block(ext2_inode_t *, uint8_t level);
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| 97 |
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| 98 |
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| 99 |
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| 100 | #endif
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| 101 |
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| 102 | /** @}
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| 103 | */
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