| 1 | /*
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| 2 | * Copyright (c) 2008 Jakub Jermar
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| 3 | * Copyright (c) 2011 Oleg Romanenko
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup fs
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| 31 | * @{
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| 32 | */
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| 33 |
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| 34 | #ifndef EXFAT_FAT_FAT_H_
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| 35 | #define EXFAT_FAT_FAT_H_
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| 36 |
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| 37 | #include "../../vfs/vfs.h"
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| 38 | #include <stdint.h>
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| 39 | #include <libblock.h>
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| 40 |
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| 41 | #define EXFAT_ROOT_IDX 0
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| 42 | #define EXFAT_BITMAP_IDX 1
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| 43 | #define EXFAT_UCTABLE_IDX 2
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| 44 |
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| 45 | #define EXFAT_ROOT_PAR 0
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| 46 | #define EXFAT_ROOT_POS 0
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| 47 |
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| 48 | #define EXFAT_CLST_FIRST 0x00000002
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| 49 | #define EXFAT_CLST_LAST 0xfffffff6
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| 50 | #define EXFAT_CLST_BAD 0xfffffff7
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| 51 | #define EXFAT_CLST_EOF 0xffffffff
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| 52 |
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| 53 | /* forward declarations */
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| 54 | struct block;
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| 55 | struct exfat_node;
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| 56 | struct exfat_bs;
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| 57 |
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| 58 | typedef uint32_t exfat_cluster_t;
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| 59 |
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| 60 |
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| 61 | #define exfat_clusters_get(numc, bs, dh, fc) \
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| 62 | exfat_cluster_walk((bs), (dh), (fc), NULL, (numc), (uint32_t) -1)
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| 63 | extern int exfat_cluster_walk(struct exfat_bs *bs, devmap_handle_t devmap_handle,
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| 64 | exfat_cluster_t firstc, exfat_cluster_t *lastc, uint32_t *numc,
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| 65 | uint32_t max_clusters);
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| 66 | extern int exfat_block_get(block_t **block, struct exfat_bs *bs,
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| 67 | struct exfat_node *nodep, aoff64_t bn, int flags);
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| 68 | extern int exfat_block_get_by_clst(block_t **block, struct exfat_bs *bs,
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| 69 | devmap_handle_t devmap_handle, bool fragmented, exfat_cluster_t fcl,
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| 70 | exfat_cluster_t *clp, aoff64_t bn, int flags);
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| 71 |
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| 72 | extern int exfat_get_cluster(struct exfat_bs *bs, devmap_handle_t devmap_handle,
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| 73 | exfat_cluster_t clst, exfat_cluster_t *value);
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| 74 | extern int exfat_set_cluster(struct exfat_bs *bs, devmap_handle_t devmap_handle,
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| 75 | exfat_cluster_t clst, exfat_cluster_t value);
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| 76 | extern int exfat_sanity_check(struct exfat_bs *, devmap_handle_t);
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| 77 |
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| 78 | extern int exfat_append_clusters(struct exfat_bs *, struct exfat_node *,
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| 79 | exfat_cluster_t, exfat_cluster_t);
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| 80 | extern int exfat_chop_clusters(struct exfat_bs *, struct exfat_node *,
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| 81 | exfat_cluster_t);
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| 82 | extern int exfat_alloc_clusters(struct exfat_bs *, devmap_handle_t, unsigned,
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| 83 | exfat_cluster_t *, exfat_cluster_t *);
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| 84 | extern int exfat_free_clusters(struct exfat_bs *, devmap_handle_t, exfat_cluster_t);
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| 85 |
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| 86 |
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| 87 | #endif
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| 88 |
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| 89 | /**
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| 90 | * @}
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| 91 | */
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