| 1 | /*
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| 2 | * Copyright (c) 2011 Frantisek Princ
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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 libext4
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #ifndef LIBEXT4_LIBEXT4_FILESYSTEM_H_
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| 34 | #define LIBEXT4_LIBEXT4_FILESYSTEM_H_
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| 35 |
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| 36 | #include <libblock.h>
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| 37 | #include "libext4_block_group.h"
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| 38 | #include "libext4_inode.h"
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| 39 | #include "libext4_superblock.h"
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| 40 |
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| 41 | typedef struct ext4_filesystem {
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| 42 | service_id_t device;
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| 43 | ext4_superblock_t * superblock;
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| 44 | aoff64_t inode_block_limits[4];
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| 45 | aoff64_t inode_blocks_per_level[4];
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| 46 | } ext4_filesystem_t;
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| 47 |
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| 48 | #define EXT4_MIN_BLOCK_SIZE 1024 //1 KiB
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| 49 | #define EXT4_MAX_BLOCK_SIZE 65536 //64 KiB
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| 50 | #define EXT4_REV0_INODE_SIZE 128
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| 51 |
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| 52 |
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| 53 | extern int ext4_filesystem_init(ext4_filesystem_t *, service_id_t);
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| 54 | extern int ext4_filesystem_fini(ext4_filesystem_t *fs, bool);
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| 55 | extern int ext4_filesystem_check_sanity(ext4_filesystem_t *fs);
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| 56 | extern int ext4_filesystem_check_features(ext4_filesystem_t *, bool *);
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| 57 | extern int ext4_filesystem_get_block_group_ref(ext4_filesystem_t *, uint32_t,
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| 58 | ext4_block_group_ref_t **);
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| 59 | extern int ext4_filesystem_put_block_group_ref(ext4_block_group_ref_t *);
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| 60 | extern int ext4_filesystem_get_inode_ref(ext4_filesystem_t *, uint32_t,
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| 61 | ext4_inode_ref_t **);
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| 62 | extern int ext4_filesystem_put_inode_ref(ext4_inode_ref_t *);
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| 63 | extern int ext4_filesystem_alloc_inode(ext4_filesystem_t *,
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| 64 | ext4_inode_ref_t **, int);
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| 65 | extern int ext4_filesystem_free_inode(ext4_filesystem_t *, ext4_inode_ref_t *);
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| 66 | extern int ext4_filesystem_truncate_inode(ext4_filesystem_t *,
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| 67 | ext4_inode_ref_t *, aoff64_t);
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| 68 | extern int ext4_filesystem_get_inode_data_block_index(ext4_filesystem_t *,
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| 69 | ext4_inode_t *, aoff64_t iblock, uint32_t *);
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| 70 | extern int ext4_filesystem_set_inode_data_block_index(ext4_filesystem_t *,
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| 71 | ext4_inode_ref_t *, aoff64_t, uint32_t);
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| 72 | extern int ext4_filesystem_release_inode_block(ext4_filesystem_t *,
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| 73 | ext4_inode_ref_t *, uint32_t);
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| 74 | extern int ext4_filesystem_add_orphan(ext4_filesystem_t *,
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| 75 | ext4_inode_ref_t *);
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| 76 | extern int ext4_filesystem_delete_orphan(ext4_filesystem_t *,
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| 77 | ext4_inode_ref_t *);
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| 78 | #endif
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| 79 |
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| 80 | /**
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| 81 | * @}
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| 82 | */
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