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Re: [PATCH] hw/block/nvme: add smart_critical_warning property
From: |
Klaus Jensen |
Subject: |
Re: [PATCH] hw/block/nvme: add smart_critical_warning property |
Date: |
Mon, 11 Jan 2021 10:21:08 +0100 |
On Jan 11 10:14, Philippe Mathieu-Daudé wrote:
> On 1/11/21 8:50 AM, zhenwei pi wrote:
> > 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.
> >
> > Test with this patch:
> > 1, append 'smart_critical_warning=16' for nvme parameters.
> > 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 | 4 ++++
> > hw/block/nvme.h | 1 +
> > 2 files changed, 5 insertions(+)
> >
> > diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> > index 27d2c72716..2f0bcac91c 100644
> > --- a/hw/block/nvme.c
> > +++ b/hw/block/nvme.c
> > @@ -1215,6 +1215,8 @@ 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->params.smart_critical_warning;
> > +
> > smart.data_units_read[0] = cpu_to_le64(DIV_ROUND_UP(stats.units_read,
> > 1000));
> > smart.data_units_written[0] =
> > cpu_to_le64(DIV_ROUND_UP(stats.units_written,
> > @@ -2824,6 +2826,8 @@ static Property nvme_props[] = {
> > DEFINE_PROP_UINT32("aer_max_queued", NvmeCtrl, params.aer_max_queued,
> > 64),
> > DEFINE_PROP_UINT8("mdts", NvmeCtrl, params.mdts, 7),
> > DEFINE_PROP_BOOL("use-intel-id", NvmeCtrl, params.use_intel_id, false),
> > + DEFINE_PROP_UINT8("smart_critical_warning", NvmeCtrl,
> > + params.smart_critical_warning, 0),
> > DEFINE_PROP_END_OF_LIST(),
> > };
> >
> > diff --git a/hw/block/nvme.h b/hw/block/nvme.h
> > index e080a2318a..76684f5ac0 100644
> > --- a/hw/block/nvme.h
> > +++ b/hw/block/nvme.h
> > @@ -16,6 +16,7 @@ typedef struct NvmeParams {
> > uint32_t aer_max_queued;
> > uint8_t mdts;
> > bool use_intel_id;
> > + uint8_t smart_critical_warning;
> > } NvmeParams;
> >
> > typedef struct NvmeAsyncEvent {
> >
>
> This is an easy way to achieve your goal.
>
> However a better way is to add a QMP command to
> change NvmeCtrl->temperature.
>
> See for example tmp105_initfn() in hw/misc/tmp105.c
> and qmp_tmp105_set_temperature() in tests/qtest/tmp105-test.c.
>
Nice.
+1 for this approach.
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