[PATCH 08/23] qemu: reset max iotune setting when needed
Currenly API is not very convinient when switching from read/write to total
tunes back and forth. read/write and total tunes can not be set simulaneously
so one need to choose one. Now if for example total_bytes_sec and
total_bytes_sec_max are set and we set read_bytes_sec only then API fails. The
issue is new max settings are copied from the old ones in this case and as
a result after defaults are applied we got settings for read_bytes_sec and
total_bytes_sec_max which is incorrect.
In order to handle such situation nicely let's reset max settings if
appropriate avg settings is reseted explicitly or implicitly.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com>
---
src/qemu/qemu_driver.c | 31 ++++++++++++++++++++-----------
1 file changed, 20 insertions(+), 11 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 117c7b7..9093baf 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -15901,6 +15901,22 @@ qemuDomainSetBlockIoTuneDefaults(virDomainBlockIoTuneInfoPtr
newinfo,
SET_IOTUNE_DEFAULTS(IOPS_MAX, iops_sec_max);
#undef SET_IOTUNE_DEFAULTS
+#define RESET_IOTUNE_MAX(BOOL, FIELD) \
+ do { \
+ if (set_fields & QEMU_BLOCK_IOTUNE_SET_##BOOL) { \
+ if (!newinfo->total_##FIELD) \
+ newinfo->total_##FIELD##_max = 0; \
+ if (!newinfo->read_##FIELD) \
+ newinfo->read_##FIELD##_max = 0; \
+ if (!newinfo->write_##FIELD) \
+ newinfo->write_##FIELD##_max = 0; \
+ } \
+ } while (0)
+
+ RESET_IOTUNE_MAX(BYTES, bytes_sec);
+ RESET_IOTUNE_MAX(IOPS, iops_sec);
+#undef RESET_IOTUNE_MAX
+
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_SIZE_IOPS))
newinfo->size_iops_sec = oldinfo->size_iops_sec;
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_GROUP_NAME))
@@ -16210,17 +16226,10 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
do { \
if (info.val##_max) { \
if (!info.val) { \
- if (QEMU_BLOCK_IOTUNE_SET_##_bool) { \
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
- _("cannot reset '%s' when " \
- "'%s' is set"), \
- #val, #val "_max"); \
- } else { \
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
- _("value '%s' cannot be set if "
\
- "'%s' is not set"), \
- #val "_max", #val); \
- } \
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
+ _("value '%s' cannot be set if " \
+ "'%s' is not set"), \
+ #val "_max", #val); \
goto endjob; \
} \
if (info.val##_max < info.val) { \
--
1.8.3.1