[libvirt] [PATCH v4 4/6] qemu: Add bps_max and friends QMP suport

[Matthias Gatto]

Detect if the the qemu binary currently in use suport the bps_max option,
If yes add it to the command, if not, just ignore the options.

Signed-off-by: Matthias Gatto <matthias.gatto at outscale.com>
---
 src/qemu/qemu_monitor_json.c | 59 +++++++++++++++++++++++++++++++++++---------
 1 file changed, 48 insertions(+), 11 deletions(-)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index a8759dd..bef7b5b 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -4029,6 +4029,12 @@ int qemuMonitorJSONOpenGraphics(qemuMonitorPtr mon,
 }
 
 
+#define GET_THROTTLE_STATS_OPTIONAL(FIELD, STORE)                             \
+    if (virJSONValueObjectGetNumberUlong(inserted,                            \
+                                         FIELD,                               \
+                                         &reply->STORE) < 0) {                \
+        reply->STORE = 0;                                                     \
+    }
 #define GET_THROTTLE_STATS(FIELD, STORE)                                      \
     if (virJSONValueObjectGetNumberUlong(inserted,                            \
                                          FIELD,                               \
@@ -4050,7 +4056,6 @@ qemuMonitorJSONBlockIoThrottleInfo(virJSONValuePtr result,
     size_t i;
     bool found = false;
 
-    (void)supportMaxOptions;
     io_throttle = virJSONValueObjectGet(result, "return");
 
     if (!io_throttle || io_throttle->type != VIR_JSON_TYPE_ARRAY) {
@@ -4096,6 +4101,16 @@ qemuMonitorJSONBlockIoThrottleInfo(virJSONValuePtr result,
         GET_THROTTLE_STATS("iops", total_iops_sec);
         GET_THROTTLE_STATS("iops_rd", read_iops_sec);
         GET_THROTTLE_STATS("iops_wr", write_iops_sec);
+        if (supportMaxOptions)
+        {
+            GET_THROTTLE_STATS_OPTIONAL("bps_max", total_bytes_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("bps_rd_max", read_bytes_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("bps_wr_max", write_bytes_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("iops_max", total_iops_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("iops_rd_max", read_iops_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("iops_wr_max", write_iops_sec_max);
+            GET_THROTTLE_STATS_OPTIONAL("iops_size", size_iops_sec);
+        }
 
         break;
     }
@@ -4112,6 +4127,7 @@ qemuMonitorJSONBlockIoThrottleInfo(virJSONValuePtr result,
     return ret;
 }
 #undef GET_THROTTLE_STATS
+#undef GET_THROTTLE_STATS_OPTIONAL
 
 int qemuMonitorJSONSetBlockIoThrottle(qemuMonitorPtr mon,
                                       const char *device,
@@ -4122,16 +4138,37 @@ int qemuMonitorJSONSetBlockIoThrottle(qemuMonitorPtr mon,
     virJSONValuePtr cmd = NULL;
     virJSONValuePtr result = NULL;
 
-    (void)supportMaxOptions;
-    cmd = qemuMonitorJSONMakeCommand("block_set_io_throttle",
-                                     "s:device", device,
-                                     "U:bps", info->total_bytes_sec,
-                                     "U:bps_rd", info->read_bytes_sec,
-                                     "U:bps_wr", info->write_bytes_sec,
-                                     "U:iops", info->total_iops_sec,
-                                     "U:iops_rd", info->read_iops_sec,
-                                     "U:iops_wr", info->write_iops_sec,
-                                     NULL);
+    if (supportMaxOptions)
+    {
+        cmd = qemuMonitorJSONMakeCommand("block_set_io_throttle",
+                                         "s:device", device,
+                                         "U:bps", info->total_bytes_sec,
+                                         "U:bps_rd", info->read_bytes_sec,
+                                         "U:bps_wr", info->write_bytes_sec,
+                                         "U:iops", info->total_iops_sec,
+                                         "U:iops_rd", info->read_iops_sec,
+                                         "U:iops_wr", info->write_iops_sec,
+                                         "U:bps_max", info->total_bytes_sec_max,
+                                         "U:bps_rd_max", info->read_bytes_sec_max,
+                                         "U:bps_wr_max", info->write_bytes_sec_max,
+                                         "U:iops_max", info->total_iops_sec_max,
+                                         "U:iops_rd_max", info->read_iops_sec_max,
+                                         "U:iops_wr_max", info->write_iops_sec_max,
+                                         "U:iops_size", info->size_iops_sec,
+                                         NULL);
+    }
+    else
+    {
+        cmd = qemuMonitorJSONMakeCommand("block_set_io_throttle",
+                                         "s:device", device,
+                                         "U:bps", info->total_bytes_sec,
+                                         "U:bps_rd", info->read_bytes_sec,
+                                         "U:bps_wr", info->write_bytes_sec,
+                                         "U:iops", info->total_iops_sec,
+                                         "U:iops_rd", info->read_iops_sec,
+                                         "U:iops_wr", info->write_iops_sec,
+                                         NULL);
+    }
     if (!cmd)
         return -1;
 
-- 
1.8.3.1