Add qemu 2.4.0

[kvmfornfv.git] / qemu / hw / block / block.c

diff --git a/qemu/hw/block/block.c b/qemu/hw/block/block.c
new file mode 100644 (file)
index 0000000..f7243e5
--- /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;
+        }
+    }
+}