On Thu, 2021-10-07 at 02:21 -0600, Vishal Verma wrote:
> Add JSON output for fields from the 'GET_HEALTH_INFO' mailbox command
> to memory device listings.
>
> Signed-off-by: Vishal Verma <[email protected]>
> ---
> Documentation/cxl/cxl-list.txt | 4 +
> util/json.h | 1 +
> cxl/list.c | 5 +
> util/json.c | 189 +++++++++++++++++++++++++++++++++
> 4 files changed, 199 insertions(+)
>
> diff --git a/Documentation/cxl/cxl-list.txt b/Documentation/cxl/cxl-list.txt
> index bd377b3..dc86651 100644
> --- a/Documentation/cxl/cxl-list.txt
> +++ b/Documentation/cxl/cxl-list.txt
> @@ -53,6 +53,10 @@ OPTIONS
> --idle::
> Include idle (not enabled / zero-sized) devices in the listing
>
> +-H::
> +--health::
> + Include health information in the memdev listing
> +
> include::human-option.txt[]
>
> include::verbose-option.txt[]
> diff --git a/util/json.h b/util/json.h
> index 91918c8..ce575e6 100644
> --- a/util/json.h
> +++ b/util/json.h
> @@ -19,6 +19,7 @@ enum util_json_flags {
> UTIL_JSON_CONFIGURED = (1 << 7),
> UTIL_JSON_FIRMWARE = (1 << 8),
> UTIL_JSON_DAX_MAPPINGS = (1 << 9),
> + UTIL_JSON_HEALTH = (1 << 10),
> };
>
> struct json_object;
> diff --git a/cxl/list.c b/cxl/list.c
> index 3dea73f..2fa155a 100644
> --- a/cxl/list.c
> +++ b/cxl/list.c
> @@ -16,6 +16,7 @@ static struct {
> bool memdevs;
> bool idle;
> bool human;
> + bool health;
> } list;
>
> static unsigned long listopts_to_flags(void)
> @@ -26,6 +27,8 @@ static unsigned long listopts_to_flags(void)
> flags |= UTIL_JSON_IDLE;
> if (list.human)
> flags |= UTIL_JSON_HUMAN;
> + if (list.health)
> + flags |= UTIL_JSON_HEALTH;
> return flags;
> }
>
> @@ -57,6 +60,8 @@ int cmd_list(int argc, const char **argv, struct cxl_ctx
> *ctx)
> OPT_BOOLEAN('i', "idle", &list.idle, "include idle devices"),
> OPT_BOOLEAN('u', "human", &list.human,
> "use human friendly number formats "),
> + OPT_BOOLEAN('H', "health", &list.health,
> + "include memory device health information "),
> OPT_END(),
> };
> const char * const u[] = {
> diff --git a/util/json.c b/util/json.c
> index 3be3a92..dfc7b8e 100644
> --- a/util/json.c
> +++ b/util/json.c
> @@ -1442,6 +1442,190 @@ struct json_object *util_badblock_rec_to_json(u64
> block, u64 count,
> return NULL;
> }
>
> +static struct json_object *util_cxl_memdev_health_to_json(
> + struct cxl_memdev *memdev, unsigned long flags)
> +{
> + const char *devname = cxl_memdev_get_devname(memdev);
> + struct json_object *jhealth;
> + struct json_object *jobj;
> + struct cxl_cmd *cmd;
> + u32 field;
> + int rc;
> +
> + jhealth = json_object_new_object();
> + if (!jhealth)
> + return NULL;
> + if (!memdev)
> + goto err_jobj;
> +
> + cmd = cxl_cmd_new_get_health_info(memdev);
> + if (!cmd)
> + goto err_jobj;
> +
> + rc = cxl_cmd_submit(cmd);
> + /* ENOTTY - command not supported by the memdev */
> + if (rc == -ENOTTY)
> + goto err_cmd;
I'll remove this special case, as well as the error prints below. The
cmd submission could fail for any number of reasons, including
unsupported by hardware - I think for any of those cases, we can just
silently skip printing the json fields here.
> + if (rc < 0) {
> + fprintf(stderr, "%s: cmd submission failed: %s\n", devname,
> + strerror(-rc));
> + goto err_cmd;
> + }
> + rc = cxl_cmd_get_mbox_status(cmd);
> + if (rc != 0) {
> + fprintf(stderr, "%s: firmware status: %d\n", devname, rc);
> + rc = -ENXIO;
> + goto err_cmd;
> + }
> +
>
