| 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 | /**
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| 35 | * @file exfat_fat.c
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| 36 | * @brief Functions that manipulate the File Allocation Tables.
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| 37 | */
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| 38 |
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| 39 | #include "exfat_fat.h"
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| 40 | #include "exfat.h"
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| 41 | #include "../../vfs/vfs.h"
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| 42 | #include <libfs.h>
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| 43 | #include <libblock.h>
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| 44 | #include <errno.h>
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| 45 | #include <byteorder.h>
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| 46 | #include <align.h>
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| 47 | #include <assert.h>
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| 48 | #include <fibril_synch.h>
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| 49 | #include <malloc.h>
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| 50 | #include <mem.h>
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| 51 |
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| 52 |
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| 53 | /**
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| 54 | * The fat_alloc_lock mutex protects all copies of the File Allocation Table
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| 55 | * during allocation of clusters. The lock does not have to be held durring
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| 56 | * deallocation of clusters.
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| 57 | */
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| 58 | static FIBRIL_MUTEX_INITIALIZE(fat_alloc_lock);
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| 59 |
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| 60 |
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| 61 |
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| 62 | /** Perform basic sanity checks on the file system.
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| 63 | *
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| 64 | * Verify if values of boot sector fields are sane. Also verify media
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| 65 | * descriptor. This is used to rule out cases when a device obviously
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| 66 | * does not contain a exfat file system.
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| 67 | */
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| 68 | int exfat_sanity_check(exfat_bs_t *bs, devmap_handle_t devmap_handle)
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| 69 | {
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| 70 | return EOK;
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| 71 | }
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| 72 |
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| 73 | /**
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| 74 | * @}
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| 75 | */
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