69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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SPDX-License-Identifier: GPL-2.0-or-later
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UMKa - User-Mode KolibriOS developer tools
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vdisk - virtual disk
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Copyright (C) 2020-2023 Ivan Baravy <dunkaist@gmail.com>
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Copyright (C) 2021 Magomed Kostoev <mkostoevr@yandex.ru>
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*/
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "umka.h"
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#include "trace.h"
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#include "vdisk.h"
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#include "vdisk/raw.h"
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#include "vdisk/qcow2.h"
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STDCALL int
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vdisk_querymedia(void *userdata, diskmediainfo_t *minfo) {
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COVERAGE_OFF();
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struct vdisk *disk = userdata;
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minfo->flags = 0u;
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minfo->sector_size = disk->sect_size;
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minfo->capacity = disk->sect_cnt;
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COVERAGE_ON();
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return ERROR_SUCCESS;
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}
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STDCALL size_t
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vdisk_adjust_cache_size(void *userdata, size_t suggested_size) {
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struct vdisk *disk = userdata;
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if (disk->adjust_cache_size) {
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return disk->cache_size;
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} else {
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return suggested_size;
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}
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}
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struct vdisk*
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vdisk_init(const char *fname, int adjust_cache_size, size_t cache_size,
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void *io) {
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size_t fname_len = strlen(fname);
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size_t dot_raw_len = strlen(RAW_SUFFIX);
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size_t dot_qcow2_len = strlen(QCOW2_SUFFIX);
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struct vdisk *disk;
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if (fname_len > dot_raw_len
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&& !strcmp(fname + fname_len - dot_raw_len, RAW_SUFFIX)) {
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disk = (struct vdisk*)vdisk_init_raw(fname, io);
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} else if (fname_len > dot_qcow2_len
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&& !strcmp(fname + fname_len - dot_qcow2_len, QCOW2_SUFFIX)) {
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disk = (struct vdisk*)vdisk_init_qcow2(fname, io);
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} else {
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fprintf(stderr, "[vdisk] file has unknown format: %s\n", fname);
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return NULL;
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}
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disk->diskfunc.closemedia = NULL;
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disk->diskfunc.querymedia = vdisk_querymedia;
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disk->diskfunc.flush = NULL;
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disk->diskfunc.adjust_cache_size = vdisk_adjust_cache_size;
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disk->adjust_cache_size = adjust_cache_size;
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disk->cache_size = cache_size;
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disk->io = io;
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return disk;
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}
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