throttle: factor out duplicate code

This patch removes the redundant throttle code that was present in
block and fsdev device files. Now the common code is moved
to a single file.

Signed-off-by: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
(fix indent nit, Greg Kurz)
Signed-off-by: Greg Kurz <groug@kaod.org>

blockdev.c

@@ -52,6 +52,7 @@
 #include "sysemu/arch_init.h"
 #include "qemu/cutils.h"
 #include "qemu/help_option.h"
+#include "qemu/throttle-options.h"
 
 static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
     QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
@@ -4007,83 +4008,11 @@ QemuOptsList qemu_common_drive_opts = {
             .name = BDRV_OPT_READ_ONLY,
             .type = QEMU_OPT_BOOL,
             .help = "open drive file as read-only",
-        },{
-            .name = "throttling.iops-total",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit total I/O operations per second",
-        },{
-            .name = "throttling.iops-read",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit read operations per second",
-        },{
-            .name = "throttling.iops-write",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit write operations per second",
-        },{
-            .name = "throttling.bps-total",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit total bytes per second",
-        },{
-            .name = "throttling.bps-read",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit read bytes per second",
-        },{
-            .name = "throttling.bps-write",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit write bytes per second",
-        },{
-            .name = "throttling.iops-total-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations burst",
-        },{
-            .name = "throttling.iops-read-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations read burst",
-        },{
-            .name = "throttling.iops-write-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations write burst",
-        },{
-            .name = "throttling.bps-total-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes burst",
-        },{
-            .name = "throttling.bps-read-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes read burst",
-        },{
-            .name = "throttling.bps-write-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes write burst",
-        },{
-            .name = "throttling.iops-total-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-total-max burst period, in seconds",
-        },{
-            .name = "throttling.iops-read-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-read-max burst period, in seconds",
-        },{
-            .name = "throttling.iops-write-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-write-max burst period, in seconds",
-        },{
-            .name = "throttling.bps-total-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-total-max burst period, in seconds",
-        },{
-            .name = "throttling.bps-read-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-read-max burst period, in seconds",
-        },{
-            .name = "throttling.bps-write-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-write-max burst period, in seconds",
-        },{
-            .name = "throttling.iops-size",
-            .type = QEMU_OPT_NUMBER,
-            .help = "when limiting by iops max size of an I/O in bytes",
-        },{
+        },
+
+        THROTTLE_OPTS,
+
+        {
             .name = "throttling.group",
             .type = QEMU_OPT_STRING,
             .help = "name of the block throttling group",

fsdev/qemu-fsdev-opts.c

@@ -9,6 +9,7 @@
 #include "qemu/config-file.h"
 #include "qemu/option.h"
 #include "qemu/module.h"
+#include "qemu/throttle-options.h"
 
 static QemuOptsList qemu_fsdev_opts = {
     .name = "fsdev",
@@ -37,83 +38,10 @@ static QemuOptsList qemu_fsdev_opts = {
         }, {
             .name = "sock_fd",
             .type = QEMU_OPT_NUMBER,
-        }, {
-            .name = "throttling.iops-total",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit total I/O operations per second",
-        }, {
-            .name = "throttling.iops-read",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit read operations per second",
-        }, {
-            .name = "throttling.iops-write",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit write operations per second",
-        }, {
-            .name = "throttling.bps-total",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit total bytes per second",
-        }, {
-            .name = "throttling.bps-read",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit read bytes per second",
-        }, {
-            .name = "throttling.bps-write",
-            .type = QEMU_OPT_NUMBER,
-            .help = "limit write bytes per second",
-        }, {
-            .name = "throttling.iops-total-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations burst",
-        }, {
-            .name = "throttling.iops-read-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations read burst",
-        }, {
-            .name = "throttling.iops-write-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "I/O operations write burst",
-        }, {
-            .name = "throttling.bps-total-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes burst",
-        }, {
-            .name = "throttling.bps-read-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes read burst",
-        }, {
-            .name = "throttling.bps-write-max",
-            .type = QEMU_OPT_NUMBER,
-            .help = "total bytes write burst",
-        }, {
-            .name = "throttling.iops-total-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-total-max burst period, in seconds",
-        }, {
-            .name = "throttling.iops-read-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-read-max burst period, in seconds",
-        }, {
-            .name = "throttling.iops-write-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the iops-write-max burst period, in seconds",
-        }, {
-            .name = "throttling.bps-total-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-total-max burst period, in seconds",
-        }, {
-            .name = "throttling.bps-read-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-read-max burst period, in seconds",
-        }, {
-            .name = "throttling.bps-write-max-length",
-            .type = QEMU_OPT_NUMBER,
-            .help = "length of the bps-write-max burst period, in seconds",
-        }, {
-            .name = "throttling.iops-size",
-            .type = QEMU_OPT_NUMBER,
-            .help = "when limiting by iops max size of an I/O in bytes",
         },
+
+        THROTTLE_OPTS,
+
         { /*End of list */ }
     },
 };

include/qemu/throttle-options.h

@@ -0,0 +1,92 @@
+/*
+ * QEMU throttling command line options
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.
+ *
+ * See the COPYING file in the top-level directory for details.
+ *
+ */
+#ifndef THROTTLE_OPTIONS_H
+#define THROTTLE_OPTIONS_H
+
+#define THROTTLE_OPTS \
+          { \
+            .name = "throttling.iops-total",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit total I/O operations per second",\
+        },{ \
+            .name = "throttling.iops-read",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit read operations per second",\
+        },{ \
+            .name = "throttling.iops-write",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit write operations per second",\
+        },{ \
+            .name = "throttling.bps-total",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit total bytes per second",\
+        },{ \
+            .name = "throttling.bps-read",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit read bytes per second",\
+        },{ \
+            .name = "throttling.bps-write",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "limit write bytes per second",\
+        },{ \
+            .name = "throttling.iops-total-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "I/O operations burst",\
+        },{ \
+            .name = "throttling.iops-read-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "I/O operations read burst",\
+        },{ \
+            .name = "throttling.iops-write-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "I/O operations write burst",\
+        },{ \
+            .name = "throttling.bps-total-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "total bytes burst",\
+        },{ \
+            .name = "throttling.bps-read-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "total bytes read burst",\
+        },{ \
+            .name = "throttling.bps-write-max",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "total bytes write burst",\
+        },{ \
+            .name = "throttling.iops-total-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the iops-total-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.iops-read-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the iops-read-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.iops-write-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the iops-write-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.bps-total-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the bps-total-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.bps-read-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the bps-read-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.bps-write-max-length",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "length of the bps-write-max burst period, in seconds",\
+        },{ \
+            .name = "throttling.iops-size",\
+            .type = QEMU_OPT_NUMBER,\
+            .help = "when limiting by iops max size of an I/O in bytes",\
+        }
+
+#endif