Re: [ndctl PATCH v3 5/5] cxl/test: add cxl-poison.sh unit test

["Verma, Vishal L" <vishal.l.verma@intel.com>]

On Fri, 2023-11-17 at 14:35 -0800, alison.schofield@intel.com wrote:
> From: Alison Schofield <alison.schofield@intel.com>
> 
[..]

Rest of the series is looking good, just a few minor things below.

> 
> +
> +find_media_errors()
> +{
> +       local json="$1"
> +
> +       nr="$(jq -r ".nr_records" <<< "$json")"
> +       if [[ $nr != $NR_ERRS ]]; then

Minor shellcheck complaint, the right hand side of a [[ ]] check should
be quoted, so [[ $nr != "$NR_ERRS" ]]

> +               echo "$mem: $NR_ERRS poison records expected, $nr found"

$mem is never set, maybe it needs to be extracted from the json above?

> +               err "$LINENO"
> +       fi
> +}
> +
> +# Turn tracing on. Note that 'cxl list --poison' does toggle the tracing.
> +# Turning it on here allows the test user to also view inject and clear
> +# trace events.
> +echo 1 > /sys/kernel/tracing/events/cxl/cxl_poison/enable
> +
> +# Poison by memdev
> +# Inject then clear into cxl_test known pmem and ram partitions
> +find_memdev
> +inject_poison_sysfs "$memdev" "0x40000000"
> +inject_poison_sysfs "$memdev" "0x40001000"
> +inject_poison_sysfs "$memdev" "0x600"
> +inject_poison_sysfs "$memdev" "0x0"
> +NR_ERRS=4
> +json=$("$CXL" list -m "$memdev" --poison | jq -r '.[].poison')
> +find_media_errors "$json"

Instead of setting NR_ERRS 'globally', just pass it to the
find_media_errors function as well alongside $json, and maybe rename it
to validate_nr_records() or something. More generaly, no need to
capitalize something like NR_ERRS - all caps is usually only for
variables coming from the env.

> +clear_poison_sysfs "$memdev" "0x40000000"
> +clear_poison_sysfs "$memdev" "0x40001000"
> +clear_poison_sysfs "$memdev" "0x600"
> +clear_poison_sysfs "$memdev" "0x0"
> +NR_ERRS=0
> +json=$("$CXL" list -m "$memdev" --poison | jq -r '.[].poison')

Fairly minor but shellcheck complains about quoting all the "$()"
command substitutions.

> +find_media_errors "$json"
> +
> +# Poison by region
> +# Inject then clear into cxl_test known pmem dpa mappings
> +create_region
> +inject_poison_sysfs "$mem0" "0x40000000"
> +inject_poison_sysfs "$mem1" "0x40000000"
> +NR_ERRS=2
> +json=$("$CXL" list -r "$region" --poison | jq -r '.[].poison')
> +find_media_errors "$json"
> +clear_poison_sysfs "$mem0" "0x40000000"
> +clear_poison_sysfs "$mem1" "0x40000000"
> +NR_ERRS=0
> +json=$("$CXL" list -r "$region" --poison | jq -r '.[].poison')
> +find_media_errors "$json"
> +
> +check_dmesg "$LINENO"
> +
> +modprobe -r cxl-test
> diff --git a/test/meson.build b/test/meson.build
> index 224adaf41fcc..2706fa5d633c 100644
> --- a/test/meson.build
> +++ b/test/meson.build
> @@ -157,6 +157,7 @@ cxl_create_region = find_program('cxl-create-region.sh')
>  cxl_xor_region = find_program('cxl-xor-region.sh')
>  cxl_update_firmware = find_program('cxl-update-firmware.sh')
>  cxl_events = find_program('cxl-events.sh')
> +cxl_poison = find_program('cxl-poison.sh')
>  
>  tests = [
>    [ 'libndctl',               libndctl,                  'ndctl' ],
> @@ -186,6 +187,7 @@ tests = [
>    [ 'cxl-create-region.sh',   cxl_create_region,  'cxl'   ],
>    [ 'cxl-xor-region.sh',      cxl_xor_region,     'cxl'   ],
>    [ 'cxl-events.sh',          cxl_events,         'cxl'   ],
> +  [ 'cxl-poison.sh',          cxl_poison,         'cxl'   ],
>  ]
>  
>  if get_option('destructive').enabled()