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-rw-r--r--qemu/hw/block/block.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/qemu/hw/block/block.c b/qemu/hw/block/block.c
new file mode 100644
index 000000000..f7243e5b9
--- /dev/null
+++ b/qemu/hw/block/block.c
@@ -0,0 +1,91 @@
+/*
+ * Common code for block device models
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "sysemu/blockdev.h"
+#include "sysemu/block-backend.h"
+#include "hw/block/block.h"
+#include "qemu/error-report.h"
+
+void blkconf_serial(BlockConf *conf, char **serial)
+{
+ DriveInfo *dinfo;
+
+ if (!*serial) {
+ /* try to fall back to value set with legacy -drive serial=... */
+ dinfo = blk_legacy_dinfo(conf->blk);
+ if (dinfo) {
+ *serial = g_strdup(dinfo->serial);
+ }
+ }
+}
+
+void blkconf_blocksizes(BlockConf *conf)
+{
+ BlockBackend *blk = conf->blk;
+ BlockSizes blocksizes;
+ int backend_ret;
+
+ backend_ret = blk_probe_blocksizes(blk, &blocksizes);
+ /* fill in detected values if they are not defined via qemu command line */
+ if (!conf->physical_block_size) {
+ if (!backend_ret) {
+ conf->physical_block_size = blocksizes.phys;
+ } else {
+ conf->physical_block_size = BDRV_SECTOR_SIZE;
+ }
+ }
+ if (!conf->logical_block_size) {
+ if (!backend_ret) {
+ conf->logical_block_size = blocksizes.log;
+ } else {
+ conf->logical_block_size = BDRV_SECTOR_SIZE;
+ }
+ }
+}
+
+void blkconf_geometry(BlockConf *conf, int *ptrans,
+ unsigned cyls_max, unsigned heads_max, unsigned secs_max,
+ Error **errp)
+{
+ DriveInfo *dinfo;
+
+ if (!conf->cyls && !conf->heads && !conf->secs) {
+ /* try to fall back to value set with legacy -drive cyls=... */
+ dinfo = blk_legacy_dinfo(conf->blk);
+ if (dinfo) {
+ conf->cyls = dinfo->cyls;
+ conf->heads = dinfo->heads;
+ conf->secs = dinfo->secs;
+ if (ptrans) {
+ *ptrans = dinfo->trans;
+ }
+ }
+ }
+ if (!conf->cyls && !conf->heads && !conf->secs) {
+ hd_geometry_guess(conf->blk,
+ &conf->cyls, &conf->heads, &conf->secs,
+ ptrans);
+ } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) {
+ *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs);
+ }
+ if (conf->cyls || conf->heads || conf->secs) {
+ if (conf->cyls < 1 || conf->cyls > cyls_max) {
+ error_setg(errp, "cyls must be between 1 and %u", cyls_max);
+ return;
+ }
+ if (conf->heads < 1 || conf->heads > heads_max) {
+ error_setg(errp, "heads must be between 1 and %u", heads_max);
+ return;
+ }
+ if (conf->secs < 1 || conf->secs > secs_max) {
+ error_setg(errp, "secs must be between 1 and %u", secs_max);
+ return;
+ }
+ }
+}