84 lines
2.3 KiB
C
84 lines
2.3 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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* biosboot.c
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* GPT bios boot 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/biosboot.h>
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#include <mount/blockdevice.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 biosboot_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 biosboot_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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if ( p->table_type != PARTITION_TABLE_TYPE_GPT )
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return false;
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unsigned char uuid[16];
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uuid_from_string(uuid, BIOSBOOT_GPT_TYPE_UUID);
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return memcmp(p->gpt_type_guid, uuid, 16) == 0;
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}
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static void biosboot_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 biosboot_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 = &biosboot_handler;
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fs->handler_private = NULL;
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fs->fstype_name = "biosboot";
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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 biosboot_handler =
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{
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.handler_name = "biosboot",
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.probe_amount = biosboot_probe_amount,
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.probe = biosboot_probe,
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.inspect = biosboot_inspect,
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.release = biosboot_release,
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};
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