[PATCH v3] LXC: trivially support flag VIR_DRV_FEATURE_TYPED_PARAM_STRING

[Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>]

fix:
virsh -c lxc:/// memtune DOMAIN
error: Unable to get number of memory parameters
error: unsupported flags (0x4) in function lxcDomainGetMemoryParameters

Signed-off-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
---
v2: also fix a similar issue in lxcDomainGetSchedulerParametersFlags
v3: fix improper comments

 src/lxc/lxc_driver.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 06f3e18..3875bf3 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -895,7 +895,11 @@ lxcDomainGetMemoryParameters(virDomainPtr dom,
     size_t i;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
-                  VIR_DOMAIN_AFFECT_CONFIG, -1);
+                  VIR_DOMAIN_AFFECT_CONFIG |
+                  VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+    /* We don't return strings, and thus trivially support this flag.  */
+    flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
     if (!(vm = lxcDomObjFromDomain(dom)))
         goto cleanup;
@@ -1993,7 +1997,11 @@ lxcDomainGetSchedulerParametersFlags(virDomainPtr dom,
     virLXCDomainObjPrivatePtr priv;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
-                  VIR_DOMAIN_AFFECT_CONFIG, -1);
+                  VIR_DOMAIN_AFFECT_CONFIG |
+                  VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+    /* We don't return strings, and thus trivially support this flag.  */
+    flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
     if (!(vm = lxcDomObjFromDomain(dom)))
         goto cleanup;
-- 
1.9.0

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