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[PATCH v2 1/1] hw/block/nvme: add smart_critical_warning property
From: |
zhenwei pi |
Subject: |
[PATCH v2 1/1] hw/block/nvme: add smart_critical_warning property |
Date: |
Tue, 12 Jan 2021 15:49:24 +0800 |
There is a very low probability that hitting physical NVMe disk
hardware critical warning case, it's hard to write & test a monitor
agent service.
For debugging purposes, add a new 'smart_critical_warning' property
to emulate this situation.
The orignal version of this change is implemented by adding a fixed
property which could be initialized by QEMU command line. Suggested
by Philippe & Klaus, rework like current version.
Test with this patch:
1, change smart_critical_warning property for a running VM:
#virsh qemu-monitor-command nvme-upstream '{ "execute": "qom-set",
"arguments": { "path": "/machine/peripheral-anon/device[0]",
"property": "smart_critical_warning", "value":16 } }'
2, run smartctl in guest
#smartctl -H -l error /dev/nvme0n1
=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: FAILED!
- volatile memory backup device has failed
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
---
hw/block/nvme.c | 28 ++++++++++++++++++++++++++++
hw/block/nvme.h | 1 +
2 files changed, 29 insertions(+)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 27d2c72716..a98757b6a1 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1214,6 +1214,7 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae,
uint32_t buf_len,
}
trans_len = MIN(sizeof(smart) - off, buf_len);
+ smart.critical_warning = n->smart_critical_warning;
smart.data_units_read[0] = cpu_to_le64(DIV_ROUND_UP(stats.units_read,
1000));
@@ -2827,6 +2828,29 @@ static Property nvme_props[] = {
DEFINE_PROP_END_OF_LIST(),
};
+
+static void nvme_get_smart_warning(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ NvmeCtrl *s = NVME(obj);
+ uint8_t value = s->smart_critical_warning;
+
+ visit_type_uint8(v, name, &value, errp);
+}
+
+static void nvme_set_smart_warning(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ NvmeCtrl *s = NVME(obj);
+ uint8_t value;
+
+ if (!visit_type_uint8(v, name, &value, errp)) {
+ return;
+ }
+
+ s->smart_critical_warning = value;
+}
+
static const VMStateDescription nvme_vmstate = {
.name = "nvme",
.unmigratable = 1,
@@ -2857,6 +2881,10 @@ static void nvme_instance_init(Object *obj)
"bootindex", "/namespace@1,0",
DEVICE(obj));
}
+
+ object_property_add(obj, "smart_critical_warning", "uint8",
+ nvme_get_smart_warning,
+ nvme_set_smart_warning, NULL, NULL);
}
static const TypeInfo nvme_info = {
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index e080a2318a..64e3497244 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -139,6 +139,7 @@ typedef struct NvmeCtrl {
uint64_t timestamp_set_qemu_clock_ms; /* QEMU clock time */
uint64_t starttime_ms;
uint16_t temperature;
+ uint8_t smart_critical_warning;
HostMemoryBackend *pmrdev;
--
2.25.1