[PATCH 09/23] qemu: add max iotune settings check to virDomainBlockIoTuneValidate

[Nikolay Shirokovskiy]

Now only qemu and test drivers support iotunes and for both of them this check
makes sense. I guess there is little chance that this patch will break loading
of some domains with incorrect config though. If this is the issue then we can
put this common check to a different place.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---
 src/conf/domain_conf.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 173424a..800bca5 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -8663,6 +8663,35 @@ virDomainBlockIoTuneValidate(virDomainBlockIoTuneInfoPtr iotune)
         return -1;
     }
 
+#define CHECK_MAX(val) \
+    do { \
+        if (iotune->val##_max) { \
+            if (!iotune->val) { \
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
+                               _("value '%s' cannot be set if " \
+                                 "'%s' is not set"), \
+                               #val "_max", #val); \
+                return -1; \
+            } \
+            if (iotune->val##_max < iotune->val) { \
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
+                               _("value '%s' cannot be " \
+                                 "smaller than '%s'"), \
+                               #val "_max", #val); \
+                return -1; \
+            } \
+        } \
+    } while (false)
+
+    CHECK_MAX(total_bytes_sec);
+    CHECK_MAX(read_bytes_sec);
+    CHECK_MAX(write_bytes_sec);
+    CHECK_MAX(total_iops_sec);
+    CHECK_MAX(read_iops_sec);
+    CHECK_MAX(write_iops_sec);
+
+#undef CHECK_MAX
+
     return 0;
 }
 
-- 
1.8.3.1