82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* Copyright (c) 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* extended.c
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* MBR extended partition.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#include <mount/blockdevice.h>
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#include <mount/extended.h>
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#include <mount/filesystem.h>
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#include <mount/partition.h>
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#include <mount/uuid.h>
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#include "util.h"
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static size_t extended_probe_amount(struct blockdevice* bdev)
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{
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(void) bdev;
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return 0;
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}
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static bool extended_probe(struct blockdevice* bdev,
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const unsigned char* leading,
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size_t amount)
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{
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(void) leading;
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(void) amount;
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struct partition* p = bdev->p;
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if ( !p )
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return false;
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return p->table_type == PARTITION_TABLE_TYPE_MBR &&
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(p->mbr_system_id == 0x05 ||
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p->mbr_system_id == 0x0F);
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}
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static void extended_release(struct filesystem* fs)
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{
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if ( !fs )
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return;
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free(fs);
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}
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static enum filesystem_error extended_inspect(struct filesystem** fs_ptr,
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struct blockdevice* bdev)
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{
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*fs_ptr = NULL;
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struct filesystem* fs = CALLOC_TYPE(struct filesystem);
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if ( !fs )
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return FILESYSTEM_ERROR_ERRNO;
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fs->bdev = bdev;
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fs->handler = &extended_handler;
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fs->handler_private = NULL;
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fs->fstype_name = "extended";
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fs->flags = FILESYSTEM_FLAG_NOT_FILESYSTEM;
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return *fs_ptr = fs, FILESYSTEM_ERROR_NONE;
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}
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const struct filesystem_handler extended_handler =
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{
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.handler_name = "extended",
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.probe_amount = extended_probe_amount,
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.probe = extended_probe,
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.inspect = extended_inspect,
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.release = extended_release,
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};
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