[PATCH v9 3/5] move logical block size check function to a common utility function

[Coiby Xu <coiby.xu@gmail.com>]

Move logical block size check function in hw/core/qdev-properties.c:set_blocksize() to util/block-helpers.c

Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
---
 hw/core/qdev-properties.c | 18 +++------------
 util/Makefile.objs        |  1 +
 util/block-helpers.c      | 46 +++++++++++++++++++++++++++++++++++++++
 util/block-helpers.h      |  7 ++++++
 4 files changed, 57 insertions(+), 15 deletions(-)
 create mode 100644 util/block-helpers.c
 create mode 100644 util/block-helpers.h

diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index cc924815da..a4a6aa5204 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -14,6 +14,7 @@
 #include "qapi/visitor.h"
 #include "chardev/char.h"
 #include "qemu/uuid.h"
+#include "util/block-helpers.h"
 
 void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
                                   Error **errp)
@@ -736,8 +737,6 @@ static void set_blocksize(Object *obj, Visitor *v, const char *name,
     Property *prop = opaque;
     uint16_t value, *ptr = qdev_get_prop_ptr(dev, prop);
     Error *local_err = NULL;
-    const int64_t min = 512;
-    const int64_t max = 32768;
 
     if (dev->realized) {
         qdev_prop_set_after_realize(dev, name, errp);
@@ -749,21 +748,10 @@ static void set_blocksize(Object *obj, Visitor *v, const char *name,
         error_propagate(errp, local_err);
         return;
     }
-    /* value of 0 means "unset" */
-    if (value && (value < min || value > max)) {
-        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE,
-                   dev->id ? : "", name, (int64_t)value, min, max);
+    check_logical_block_size(dev->id ? : "", name, value, errp);
+    if (errp) {
         return;
     }
-
-    /* We rely on power-of-2 blocksizes for bitmasks */
-    if ((value & (value - 1)) != 0) {
-        error_setg(errp,
-                  "Property %s.%s doesn't take value '%" PRId64 "', it's not a power of 2",
-                  dev->id ?: "", name, (int64_t)value);
-        return;
-    }
-
     *ptr = value;
 }
 
diff --git a/util/Makefile.objs b/util/Makefile.objs
index b4d4af06dc..fa5380ddab 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -66,6 +66,7 @@ util-obj-y += hbitmap.o
 util-obj-y += main-loop.o
 util-obj-y += nvdimm-utils.o
 util-obj-y += qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o
+util-obj-y += block-helpers.o
 util-obj-$(CONFIG_LINUX) += vhost-user-server.o
 util-obj-y += qemu-coroutine-sleep.o
 util-obj-y += qemu-co-shared-resource.o
diff --git a/util/block-helpers.c b/util/block-helpers.c
new file mode 100644
index 0000000000..d31309cc0e
--- /dev/null
+++ b/util/block-helpers.c
@@ -0,0 +1,46 @@
+/*
+ * Block utility functions
+ *
+ * Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
+ *
+ * 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 "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qerror.h"
+#include "block-helpers.h"
+
+/*
+ * Logical block size input validation
+ *
+ * The size should meet the following conditions:
+ * 1. min=512
+ * 2. max=32768
+ * 3. a power of 2
+ *
+ *  Moved from hw/core/qdev-properties.c:set_blocksize()
+ */
+void check_logical_block_size(const char *id, const char *name, uint16_t value,
+                     Error **errp)
+{
+    const int64_t min = 512;
+    const int64_t max = 32768;
+
+    /* value of 0 means "unset" */
+    if (value && (value < min || value > max)) {
+        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE,
+                   id, name, (int64_t)value, min, max);
+        return;
+    }
+
+    /* We rely on power-of-2 blocksizes for bitmasks */
+    if ((value & (value - 1)) != 0) {
+        error_setg(errp,
+                   "Property %s.%s doesn't take value '%" PRId64
+                   "', it's not a power of 2",
+                   id, name, (int64_t)value);
+        return;
+    }
+}
diff --git a/util/block-helpers.h b/util/block-helpers.h
new file mode 100644
index 0000000000..f06be282a1
--- /dev/null
+++ b/util/block-helpers.h
@@ -0,0 +1,7 @@
+#ifndef BLOCK_HELPERS_H
+#define BLOCK_HELPERS_H
+
+void check_logical_block_size(const char *id, const char *name, uint16_t value,
+                     Error **errp);
+
+#endif /* BLOCK_HELPERS_H */
-- 
2.27.0