mirror of https://gitee.com/openkylin/qemu.git
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
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* Common code for block device models
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*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "sysemu/blockdev.h"
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#include "sysemu/block-backend.h"
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#include "hw/block/block.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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void blkconf_serial(BlockConf *conf, char **serial)
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{
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DriveInfo *dinfo;
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if (!*serial) {
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/* try to fall back to value set with legacy -drive serial=... */
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dinfo = blk_legacy_dinfo(conf->blk);
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if (dinfo) {
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*serial = g_strdup(dinfo->serial);
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}
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}
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}
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void blkconf_blocksizes(BlockConf *conf)
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{
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BlockBackend *blk = conf->blk;
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BlockSizes blocksizes;
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int backend_ret;
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backend_ret = blk_probe_blocksizes(blk, &blocksizes);
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/* fill in detected values if they are not defined via qemu command line */
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if (!conf->physical_block_size) {
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if (!backend_ret) {
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conf->physical_block_size = blocksizes.phys;
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} else {
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conf->physical_block_size = BDRV_SECTOR_SIZE;
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}
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}
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if (!conf->logical_block_size) {
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if (!backend_ret) {
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conf->logical_block_size = blocksizes.log;
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} else {
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conf->logical_block_size = BDRV_SECTOR_SIZE;
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}
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}
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}
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void blkconf_apply_backend_options(BlockConf *conf)
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{
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BlockBackend *blk = conf->blk;
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BlockdevOnError rerror, werror;
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bool wce;
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switch (conf->wce) {
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case ON_OFF_AUTO_ON: wce = true; break;
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case ON_OFF_AUTO_OFF: wce = false; break;
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case ON_OFF_AUTO_AUTO: wce = blk_enable_write_cache(blk); break;
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default:
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abort();
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}
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rerror = conf->rerror;
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if (rerror == BLOCKDEV_ON_ERROR_AUTO) {
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rerror = blk_get_on_error(blk, true);
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}
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werror = conf->werror;
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if (werror == BLOCKDEV_ON_ERROR_AUTO) {
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werror = blk_get_on_error(blk, false);
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}
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blk_set_enable_write_cache(blk, wce);
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blk_set_on_error(blk, rerror, werror);
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}
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void blkconf_geometry(BlockConf *conf, int *ptrans,
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unsigned cyls_max, unsigned heads_max, unsigned secs_max,
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Error **errp)
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{
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DriveInfo *dinfo;
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if (!conf->cyls && !conf->heads && !conf->secs) {
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/* try to fall back to value set with legacy -drive cyls=... */
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dinfo = blk_legacy_dinfo(conf->blk);
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if (dinfo) {
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conf->cyls = dinfo->cyls;
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conf->heads = dinfo->heads;
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conf->secs = dinfo->secs;
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if (ptrans) {
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*ptrans = dinfo->trans;
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}
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}
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}
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if (!conf->cyls && !conf->heads && !conf->secs) {
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hd_geometry_guess(conf->blk,
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&conf->cyls, &conf->heads, &conf->secs,
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ptrans);
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} else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) {
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*ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs);
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}
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if (conf->cyls || conf->heads || conf->secs) {
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if (conf->cyls < 1 || conf->cyls > cyls_max) {
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error_setg(errp, "cyls must be between 1 and %u", cyls_max);
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return;
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}
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if (conf->heads < 1 || conf->heads > heads_max) {
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error_setg(errp, "heads must be between 1 and %u", heads_max);
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return;
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}
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if (conf->secs < 1 || conf->secs > secs_max) {
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error_setg(errp, "secs must be between 1 and %u", secs_max);
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return;
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}
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}
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}
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