Adding upstream version 2.8.upstream/2.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4514 insertions, 0 deletions

diff --git a/nvme-print-json.c b/nvme-print-json.c
new file mode 100644
index 0000000..27f5c7c
--- /dev/null
+++ b/nvme-print-json.c
@@ -0,0 +1,4514 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <assert.h>
+#include <errno.h>
+#include <time.h>
+
+#include "nvme-print.h"
+
+#include "util/json.h"
+#include "nvme.h"
+#include "common.h"
+
+#define ERROR_MSG_LEN 100
+#define STR_LEN 100
+#define NAME_LEN 128
+#define BUF_LEN 320
+#define VAL_LEN 4096
+#define BYTE_TO_BIT(byte) ((byte) * 8)
+#define POWER_OF_TWO(exponent) (1 << (exponent))
+#define MS_TO_SEC(time) ((time) / 1000)
+#define MS500_TO_MS(time) ((time) * 500)
+#define MS500_TO_SEC(time) (MS_TO_SEC(MS500_TO_MS(time)))
+
+#define array_add_obj json_array_add_value_object
+#define array_add_str json_array_add_value_string
+
+#define obj_add_array json_object_add_value_array
+#define obj_add_int json_object_add_value_int
+#define obj_add_obj json_object_add_value_object
+#define obj_add_str json_object_add_value_string
+#define obj_add_uint json_object_add_value_uint
+#define obj_add_uint128 json_object_add_value_uint128
+#define obj_add_uint64 json_object_add_value_uint64
+
+static const uint8_t zero_uuid[16] = { 0 };
+static struct print_ops json_print_ops;
+static struct json_object *json_r = NULL;
+
+static void d_json(unsigned char *buf, int len, int width, int group, struct json_object *array)
+{
+	int i;
+	char ascii[32 + 1] = { 0 };
+
+	assert(width < sizeof(ascii));
+
+	for (i = 0; i < len; i++) {
+		ascii[i % width] = (buf[i] >= '!' && buf[i] <= '~') ? buf[i] : '.';
+		if (!((i + 1) % width)) {
+			array_add_str(array, ascii);
+			memset(ascii, 0, sizeof(ascii));
+		}
+	}
+
+	if (strlen(ascii)) {
+		ascii[i % width + 1] = '\0';
+		array_add_str(array, ascii);
+	}
+}
+
+static void obj_add_uint_x(struct json_object *o, const char *k, __u32 v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "%x", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_uint_0x(struct json_object *o, const char *k, __u32 v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "0x%x", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_uint_02x(struct json_object *o, const char *k, __u32 v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "0x%02x", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_uint_nx(struct json_object *o, const char *k, __u32 v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "%#x", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_nprix64(struct json_object *o, const char *k, uint64_t v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "%#"PRIx64"", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_prix64(struct json_object *o, const char *k, uint64_t v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "%"PRIx64"", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_int_secs(struct json_object *o, const char *k, int v)
+{
+	char str[STR_LEN];
+
+	sprintf(str, "%d secs", v);
+	obj_add_str(o, k, str);
+}
+
+static void obj_add_result(struct json_object *o, const char *v, ...)
+{
+	va_list ap;
+	va_start(ap, v);
+	char *value;
+
+	if (vasprintf(&value, v, ap) < 0)
+		value = NULL;
+
+	if (value)
+		obj_add_str(o, "Result", value);
+	else
+		obj_add_str(o, "Result", "Could not allocate string");
+
+	free(value);
+}
+
+static void obj_add_key(struct json_object *o, const char *k, const char *v, ...)
+{
+	va_list ap;
+	va_start(ap, v);
+	char *value;
+
+	if (vasprintf(&value, v, ap) < 0)
+		value = NULL;
+
+	if (value)
+		obj_add_str(o, k, value);
+	else
+		obj_add_str(o, k, "Could not allocate string");
+
+	free(value);
+}
+
+static struct json_object *obj_create_array_obj(struct json_object *o, const char *k)
+{
+	struct json_object *array = json_create_array();
+	struct json_object *obj = json_create_object();
+
+	obj_add_array(o, k, array);
+	array_add_obj(array, obj);
+
+	return obj;
+}
+
+static struct json_object *obj_create(const char *k)
+{
+	struct json_object *array;
+	struct json_object *obj = json_create_object();
+
+	if (json_r) {
+		array = json_create_array();
+		obj_add_array(json_r, k, array);
+		array_add_obj(array, obj);
+	}
+
+	return obj;
+}
+
+static void json_print(struct json_object *r)
+{
+	json_print_object(r, NULL);
+	printf("\n");
+	json_free_object(r);
+}
+
+static bool human(void)
+{
+	return json_print_ops.flags & VERBOSE;
+}
+
+static void json_id_iocs(struct nvme_id_iocs *iocs)
+{
+	struct json_object *r = json_create_object();
+	char json_str[STR_LEN];
+	__u16 i;
+
+	for (i = 0; i < ARRAY_SIZE(iocs->iocsc); i++) {
+		if (iocs->iocsc[i]) {
+			sprintf(json_str, "I/O Command Set Combination[%u]", i);
+			obj_add_uint64(r, json_str, le64_to_cpu(iocs->iocsc[i]));
+		}
+	}
+
+	json_print(r);
+}
+
+static void json_nvme_id_ns(struct nvme_id_ns *ns, unsigned int nsid,
+			    unsigned int lba_index, bool cap_only)
+{
+	char nguid_buf[2 * sizeof(ns->nguid) + 1],
+		eui64_buf[2 * sizeof(ns->eui64) + 1];
+	char *nguid = nguid_buf, *eui64 = eui64_buf;
+	struct json_object *r = json_create_object();
+	struct json_object *lbafs = json_create_array();
+	struct json_object *vs = json_create_array();
+	int i;
+	nvme_uint128_t nvmcap = le128_to_cpu(ns->nvmcap);
+
+	if (!cap_only) {
+		obj_add_uint64(r, "nsze", le64_to_cpu(ns->nsze));
+		obj_add_uint64(r, "ncap", le64_to_cpu(ns->ncap));
+		obj_add_uint64(r, "nuse", le64_to_cpu(ns->nuse));
+		obj_add_int(r, "nsfeat", ns->nsfeat);
+	}
+
+	obj_add_int(r, "nlbaf", ns->nlbaf);
+
+	if (!cap_only)
+		obj_add_int(r, "flbas", ns->flbas);
+
+	obj_add_int(r, "mc", ns->mc);
+	obj_add_int(r, "dpc", ns->dpc);
+
+	if (!cap_only) {
+		obj_add_int(r, "dps", ns->dps);
+		obj_add_int(r, "nmic", ns->nmic);
+		obj_add_int(r, "rescap", ns->rescap);
+		obj_add_int(r, "fpi", ns->fpi);
+		obj_add_int(r, "dlfeat", ns->dlfeat);
+		obj_add_int(r, "nawun", le16_to_cpu(ns->nawun));
+		obj_add_int(r, "nawupf", le16_to_cpu(ns->nawupf));
+		obj_add_int(r, "nacwu", le16_to_cpu(ns->nacwu));
+		obj_add_int(r, "nabsn", le16_to_cpu(ns->nabsn));
+		obj_add_int(r, "nabo", le16_to_cpu(ns->nabo));
+		obj_add_int(r, "nabspf", le16_to_cpu(ns->nabspf));
+		obj_add_int(r, "noiob", le16_to_cpu(ns->noiob));
+		obj_add_uint128(r, "nvmcap", nvmcap);
+		obj_add_int(r, "nsattr", ns->nsattr);
+		obj_add_int(r, "nvmsetid", le16_to_cpu(ns->nvmsetid));
+
+		if (ns->nsfeat & 0x10) {
+			obj_add_int(r, "npwg", le16_to_cpu(ns->npwg));
+			obj_add_int(r, "npwa", le16_to_cpu(ns->npwa));
+			obj_add_int(r, "npdg", le16_to_cpu(ns->npdg));
+			obj_add_int(r, "npda", le16_to_cpu(ns->npda));
+			obj_add_int(r, "nows", le16_to_cpu(ns->nows));
+		}
+
+		obj_add_int(r, "mssrl", le16_to_cpu(ns->mssrl));
+		obj_add_uint(r, "mcl", le32_to_cpu(ns->mcl));
+		obj_add_int(r, "msrc", ns->msrc);
+	}
+
+	obj_add_int(r, "nulbaf", ns->nulbaf);
+
+	if (!cap_only) {
+		obj_add_uint(r, "anagrpid", le32_to_cpu(ns->anagrpid));
+		obj_add_int(r, "endgid", le16_to_cpu(ns->endgid));
+
+		memset(eui64, 0, sizeof(eui64_buf));
+
+		for (i = 0; i < sizeof(ns->eui64); i++)
+			eui64 += sprintf(eui64, "%02x", ns->eui64[i]);
+
+		memset(nguid, 0, sizeof(nguid_buf));
+
+		for (i = 0; i < sizeof(ns->nguid); i++)
+			nguid += sprintf(nguid, "%02x", ns->nguid[i]);
+
+		obj_add_str(r, "eui64", eui64_buf);
+		obj_add_str(r, "nguid", nguid_buf);
+	}
+
+	obj_add_array(r, "lbafs", lbafs);
+
+	for (i = 0; i <= ns->nlbaf; i++) {
+		struct json_object *lbaf = json_create_object();
+
+		obj_add_int(lbaf, "ms", le16_to_cpu(ns->lbaf[i].ms));
+		obj_add_int(lbaf, "ds", ns->lbaf[i].ds);
+		obj_add_int(lbaf, "rp", ns->lbaf[i].rp);
+
+		array_add_obj(lbafs, lbaf);
+	}
+
+	d_json(ns->vs, strnlen((const char *)ns->vs, sizeof(ns->vs)), 16, 1, vs);
+	obj_add_array(r, "vs", vs);
+
+	json_print(r);
+}
+
+ void json_nvme_id_ctrl(struct nvme_id_ctrl *ctrl,
+			void (*vs)(__u8 *vs, struct json_object *r))
+{
+	struct json_object *r = json_create_object();
+	struct json_object *psds = json_create_array();
+	nvme_uint128_t tnvmcap = le128_to_cpu(ctrl->tnvmcap);
+	nvme_uint128_t unvmcap = le128_to_cpu(ctrl->unvmcap);
+	nvme_uint128_t megcap = le128_to_cpu(ctrl->megcap);
+	nvme_uint128_t maxdna = le128_to_cpu(ctrl->maxdna);
+	char sn[sizeof(ctrl->sn) + 1], mn[sizeof(ctrl->mn) + 1],
+		fr[sizeof(ctrl->fr) + 1], subnqn[sizeof(ctrl->subnqn) + 1];
+	__u32 ieee = ctrl->ieee[2] << 16 | ctrl->ieee[1] << 8 | ctrl->ieee[0];
+	int i;
+
+	snprintf(sn, sizeof(sn), "%-.*s", (int)sizeof(ctrl->sn), ctrl->sn);
+	snprintf(mn, sizeof(mn), "%-.*s", (int)sizeof(ctrl->mn), ctrl->mn);
+	snprintf(fr, sizeof(fr), "%-.*s", (int)sizeof(ctrl->fr), ctrl->fr);
+	snprintf(subnqn, sizeof(subnqn), "%-.*s", (int)sizeof(ctrl->subnqn), ctrl->subnqn);
+
+	obj_add_int(r, "vid", le16_to_cpu(ctrl->vid));
+	obj_add_int(r, "ssvid", le16_to_cpu(ctrl->ssvid));
+	obj_add_str(r, "sn", sn);
+	obj_add_str(r, "mn", mn);
+	obj_add_str(r, "fr", fr);
+	obj_add_int(r, "rab", ctrl->rab);
+	obj_add_int(r, "ieee", ieee);
+	obj_add_int(r, "cmic", ctrl->cmic);
+	obj_add_int(r, "mdts", ctrl->mdts);
+	obj_add_int(r, "cntlid", le16_to_cpu(ctrl->cntlid));
+	obj_add_uint(r, "ver", le32_to_cpu(ctrl->ver));
+	obj_add_uint(r, "rtd3r", le32_to_cpu(ctrl->rtd3r));
+	obj_add_uint(r, "rtd3e", le32_to_cpu(ctrl->rtd3e));
+	obj_add_uint(r, "oaes", le32_to_cpu(ctrl->oaes));
+	obj_add_uint(r, "ctratt", le32_to_cpu(ctrl->ctratt));
+	obj_add_int(r, "rrls", le16_to_cpu(ctrl->rrls));
+	obj_add_int(r, "cntrltype", ctrl->cntrltype);
+	obj_add_str(r, "fguid", util_uuid_to_string(ctrl->fguid));
+	obj_add_int(r, "crdt1", le16_to_cpu(ctrl->crdt1));
+	obj_add_int(r, "crdt2", le16_to_cpu(ctrl->crdt2));
+	obj_add_int(r, "crdt3", le16_to_cpu(ctrl->crdt3));
+	obj_add_int(r, "nvmsr", ctrl->nvmsr);
+	obj_add_int(r, "vwci", ctrl->vwci);
+	obj_add_int(r, "mec", ctrl->mec);
+	obj_add_int(r, "oacs", le16_to_cpu(ctrl->oacs));
+	obj_add_int(r, "acl", ctrl->acl);
+	obj_add_int(r, "aerl", ctrl->aerl);
+	obj_add_int(r, "frmw", ctrl->frmw);
+	obj_add_int(r, "lpa", ctrl->lpa);
+	obj_add_int(r, "elpe", ctrl->elpe);
+	obj_add_int(r, "npss", ctrl->npss);
+	obj_add_int(r, "avscc", ctrl->avscc);
+	obj_add_int(r, "apsta", ctrl->apsta);
+	obj_add_int(r, "wctemp", le16_to_cpu(ctrl->wctemp));
+	obj_add_int(r, "cctemp", le16_to_cpu(ctrl->cctemp));
+	obj_add_int(r, "mtfa", le16_to_cpu(ctrl->mtfa));
+	obj_add_uint(r, "hmpre", le32_to_cpu(ctrl->hmpre));
+	obj_add_uint(r, "hmmin", le32_to_cpu(ctrl->hmmin));
+	obj_add_uint128(r, "tnvmcap", tnvmcap);
+	obj_add_uint128(r, "unvmcap", unvmcap);
+	obj_add_uint(r, "rpmbs", le32_to_cpu(ctrl->rpmbs));
+	obj_add_int(r, "edstt", le16_to_cpu(ctrl->edstt));
+	obj_add_int(r, "dsto", ctrl->dsto);
+	obj_add_int(r, "fwug", ctrl->fwug);
+	obj_add_int(r, "kas", le16_to_cpu(ctrl->kas));
+	obj_add_int(r, "hctma", le16_to_cpu(ctrl->hctma));
+	obj_add_int(r, "mntmt", le16_to_cpu(ctrl->mntmt));
+	obj_add_int(r, "mxtmt", le16_to_cpu(ctrl->mxtmt));
+	obj_add_uint(r, "sanicap", le32_to_cpu(ctrl->sanicap));
+	obj_add_uint(r, "hmminds", le32_to_cpu(ctrl->hmminds));
+	obj_add_int(r, "hmmaxd", le16_to_cpu(ctrl->hmmaxd));
+	obj_add_int(r, "nsetidmax", le16_to_cpu(ctrl->nsetidmax));
+	obj_add_int(r, "endgidmax", le16_to_cpu(ctrl->endgidmax));
+	obj_add_int(r, "anatt",ctrl->anatt);
+	obj_add_int(r, "anacap", ctrl->anacap);
+	obj_add_uint(r, "anagrpmax", le32_to_cpu(ctrl->anagrpmax));
+	obj_add_uint(r, "nanagrpid", le32_to_cpu(ctrl->nanagrpid));
+	obj_add_uint(r, "pels", le32_to_cpu(ctrl->pels));
+	obj_add_int(r, "domainid", le16_to_cpu(ctrl->domainid));
+	obj_add_uint128(r, "megcap", megcap);
+	obj_add_int(r, "sqes", ctrl->sqes);
+	obj_add_int(r, "cqes", ctrl->cqes);
+	obj_add_int(r, "maxcmd", le16_to_cpu(ctrl->maxcmd));
+	obj_add_uint(r, "nn", le32_to_cpu(ctrl->nn));
+	obj_add_int(r, "oncs", le16_to_cpu(ctrl->oncs));
+	obj_add_int(r, "fuses", le16_to_cpu(ctrl->fuses));
+	obj_add_int(r, "fna", ctrl->fna);
+	obj_add_int(r, "vwc", ctrl->vwc);
+	obj_add_int(r, "awun", le16_to_cpu(ctrl->awun));
+	obj_add_int(r, "awupf", le16_to_cpu(ctrl->awupf));
+	obj_add_int(r, "icsvscc", ctrl->icsvscc);
+	obj_add_int(r, "nwpc", ctrl->nwpc);
+	obj_add_int(r, "acwu", le16_to_cpu(ctrl->acwu));
+	obj_add_int(r, "ocfs", le16_to_cpu(ctrl->ocfs));
+	obj_add_uint(r, "sgls", le32_to_cpu(ctrl->sgls));
+	obj_add_uint(r, "mnan", le32_to_cpu(ctrl->mnan));
+	obj_add_uint128(r, "maxdna", maxdna);
+	obj_add_uint(r, "maxcna", le32_to_cpu(ctrl->maxcna));
+	obj_add_uint(r, "oaqd", le32_to_cpu(ctrl->oaqd));
+
+	if (strlen(subnqn))
+		obj_add_str(r, "subnqn", subnqn);
+
+	obj_add_uint(r, "ioccsz", le32_to_cpu(ctrl->ioccsz));
+	obj_add_uint(r, "iorcsz", le32_to_cpu(ctrl->iorcsz));
+	obj_add_int(r, "icdoff", le16_to_cpu(ctrl->icdoff));
+	obj_add_int(r, "fcatt", ctrl->fcatt);
+	obj_add_int(r, "msdbd", ctrl->msdbd);
+	obj_add_int(r, "ofcs", le16_to_cpu(ctrl->ofcs));
+
+	obj_add_array(r, "psds", psds);
+
+	for (i = 0; i <= ctrl->npss; i++) {
+		struct json_object *psd = json_create_object();
+
+		obj_add_int(psd, "max_power", le16_to_cpu(ctrl->psd[i].mp));
+		obj_add_int(psd, "max_power_scale", ctrl->psd[i].flags & 0x1);
+		obj_add_int(psd, "non-operational_state", (ctrl->psd[i].flags & 2) >> 1);
+		obj_add_uint(psd, "entry_lat", le32_to_cpu(ctrl->psd[i].enlat));
+		obj_add_uint(psd, "exit_lat", le32_to_cpu(ctrl->psd[i].exlat));
+		obj_add_int(psd, "read_tput", ctrl->psd[i].rrt);
+		obj_add_int(psd, "read_lat", ctrl->psd[i].rrl);
+		obj_add_int(psd, "write_tput", ctrl->psd[i].rwt);
+		obj_add_int(psd, "write_lat", ctrl->psd[i].rwl);
+		obj_add_int(psd, "idle_power", le16_to_cpu(ctrl->psd[i].idlp));
+		obj_add_int(psd, "idle_scale", nvme_psd_power_scale(ctrl->psd[i].ips));
+		obj_add_int(psd, "active_power", le16_to_cpu(ctrl->psd[i].actp));
+		obj_add_int(psd, "active_power_work", ctrl->psd[i].apws & 7);
+		obj_add_int(psd, "active_scale", nvme_psd_power_scale(ctrl->psd[i].apws));
+
+		array_add_obj(psds, psd);
+	}
+
+	if(vs)
+		vs(ctrl->vs, r);
+
+	json_print(r);
+}
+
+static void json_error_log(struct nvme_error_log_page *err_log, int entries,
+			   const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *errors = json_create_array();
+	int i;
+
+	obj_add_array(r, "errors", errors);
+
+	for (i = 0; i < entries; i++) {
+		struct json_object *error = json_create_object();
+
+		obj_add_uint64(error, "error_count", le64_to_cpu(err_log[i].error_count));
+		obj_add_int(error, "sqid", le16_to_cpu(err_log[i].sqid));
+		obj_add_int(error, "cmdid", le16_to_cpu(err_log[i].cmdid));
+		obj_add_int(error, "status_field", le16_to_cpu(err_log[i].status_field >> 0x1));
+		obj_add_int(error, "phase_tag", le16_to_cpu(err_log[i].status_field & 0x1));
+		obj_add_int(error, "parm_error_location",
+			    le16_to_cpu(err_log[i].parm_error_location));
+		obj_add_uint64(error, "lba", le64_to_cpu(err_log[i].lba));
+		obj_add_uint(error, "nsid", le32_to_cpu(err_log[i].nsid));
+		obj_add_int(error, "vs", err_log[i].vs);
+		obj_add_int(error, "trtype", err_log[i].trtype);
+		obj_add_uint64(error, "cs", le64_to_cpu(err_log[i].cs));
+		obj_add_int(error, "trtype_spec_info", le16_to_cpu(err_log[i].trtype_spec_info));
+
+		array_add_obj(errors, error);
+	}
+
+	json_print(r);
+}
+
+void json_nvme_resv_report(struct nvme_resv_status *status,
+			   int bytes, bool eds)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *rcs = json_create_array();
+	int i, j, entries;
+	int regctl = status->regctl[0] | (status->regctl[1] << 8);
+
+	obj_add_uint(r, "gen", le32_to_cpu(status->gen));
+	obj_add_int(r, "rtype", status->rtype);
+	obj_add_int(r, "regctl", regctl);
+	obj_add_int(r, "ptpls", status->ptpls);
+
+	/* check Extended Data Structure bit */
+	if (!eds) {
+		/*
+		 * if status buffer was too small, don't loop past the end of
+		 * the buffer
+		 */
+		entries = (bytes - 24) / 24;
+		if (entries < regctl)
+			regctl = entries;
+
+		obj_add_array(r, "regctls", rcs);
+		for (i = 0; i < regctl; i++) {
+			struct json_object *rc = json_create_object();
+
+			obj_add_int(rc, "cntlid", le16_to_cpu(status->regctl_ds[i].cntlid));
+			obj_add_int(rc, "rcsts", status->regctl_ds[i].rcsts);
+			obj_add_uint64(rc, "hostid", le64_to_cpu(status->regctl_ds[i].hostid));
+			obj_add_uint64(rc, "rkey", le64_to_cpu(status->regctl_ds[i].rkey));
+
+			array_add_obj(rcs, rc);
+		}
+	} else {
+		char hostid[33];
+
+		/* if status buffer was too small, don't loop past the end of the buffer */
+		entries = (bytes - 64) / 64;
+
+		if (entries < regctl)
+			regctl = entries;
+
+		obj_add_array(r, "regctlext", rcs);
+
+		for (i = 0; i < regctl; i++) {
+			struct json_object *rc = json_create_object();
+
+			obj_add_int(rc, "cntlid", le16_to_cpu(status->regctl_eds[i].cntlid));
+			obj_add_int(rc, "rcsts", status->regctl_eds[i].rcsts);
+			obj_add_uint64(rc, "rkey", le64_to_cpu(status->regctl_eds[i].rkey));
+
+			for (j = 0; j < 16; j++)
+				sprintf(hostid + j * 2, "%02x", status->regctl_eds[i].hostid[j]);
+
+			obj_add_str(rc, "hostid", hostid);
+			array_add_obj(rcs, rc);
+		}
+	}
+
+	json_print(r);
+}
+
+void json_fw_log(struct nvme_firmware_slot *fw_log, const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *fwsi = json_create_object();
+	char fmt[21];
+	char str[32];
+	int i;
+	__le64 *frs;
+
+	obj_add_int(fwsi, "Active Firmware Slot (afi)", fw_log->afi);
+
+	for (i = 0; i < 7; i++) {
+		if (fw_log->frs[i][0]) {
+			snprintf(fmt, sizeof(fmt), "Firmware Rev Slot %d",
+				i + 1);
+			frs = (__le64 *)&fw_log->frs[i];
+			snprintf(str, sizeof(str), "%"PRIu64" (%s)",
+				le64_to_cpu(*frs),
+			util_fw_to_string(fw_log->frs[i]));
+			obj_add_str(fwsi, fmt, str);
+		}
+	}
+
+	obj_add_obj(r, devname, fwsi);
+
+	json_print(r);
+}
+
+void json_changed_ns_list_log(struct nvme_ns_list *log,
+			      const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *nsi = json_create_object();
+	char fmt[32];
+	char str[32];
+	__u32 nsid;
+	int i;
+
+	if (log->ns[0] == cpu_to_le32(0xffffffff))
+		return;
+
+	obj_add_str(r, "Changed Namespace List Log", devname);
+
+	for (i = 0; i < NVME_ID_NS_LIST_MAX; i++) {
+		nsid = le32_to_cpu(log->ns[i]);
+
+		if (nsid == 0)
+			break;
+
+		snprintf(fmt, sizeof(fmt), "[%4u]", i + 1);
+		snprintf(str, sizeof(str), "%#x", nsid);
+		obj_add_str(nsi, fmt, str);
+	}
+
+	obj_add_obj(r, devname, nsi);
+
+	json_print(r);
+}
+
+static void json_endurance_log(struct nvme_endurance_group_log *endurance_group, __u16 group_id,
+			       const char *devname)
+{
+	struct json_object *r = json_create_object();
+	nvme_uint128_t endurance_estimate = le128_to_cpu(endurance_group->endurance_estimate);
+	nvme_uint128_t data_units_read = le128_to_cpu(endurance_group->data_units_read);
+	nvme_uint128_t data_units_written = le128_to_cpu(endurance_group->data_units_written);
+	nvme_uint128_t media_units_written = le128_to_cpu(endurance_group->media_units_written);
+	nvme_uint128_t host_read_cmds = le128_to_cpu(endurance_group->host_read_cmds);
+	nvme_uint128_t host_write_cmds = le128_to_cpu(endurance_group->host_write_cmds);
+	nvme_uint128_t media_data_integrity_err =
+	    le128_to_cpu(endurance_group->media_data_integrity_err);
+	nvme_uint128_t num_err_info_log_entries =
+	    le128_to_cpu(endurance_group->num_err_info_log_entries);
+	nvme_uint128_t total_end_grp_cap = le128_to_cpu(endurance_group->total_end_grp_cap);
+	nvme_uint128_t unalloc_end_grp_cap = le128_to_cpu(endurance_group->unalloc_end_grp_cap);
+
+	obj_add_int(r, "critical_warning", endurance_group->critical_warning);
+	obj_add_int(r, "endurance_group_features", endurance_group->endurance_group_features);
+	obj_add_int(r, "avl_spare", endurance_group->avl_spare);
+	obj_add_int(r, "avl_spare_threshold", endurance_group->avl_spare_threshold);
+	obj_add_int(r, "percent_used", endurance_group->percent_used);
+	obj_add_int(r, "domain_identifier", endurance_group->domain_identifier);
+	obj_add_uint128(r, "endurance_estimate", endurance_estimate);
+	obj_add_uint128(r, "data_units_read", data_units_read);
+	obj_add_uint128(r, "data_units_written", data_units_written);
+	obj_add_uint128(r, "media_units_written", media_units_written);
+	obj_add_uint128(r, "host_read_cmds", host_read_cmds);
+	obj_add_uint128(r, "host_write_cmds", host_write_cmds);
+	obj_add_uint128(r, "media_data_integrity_err", media_data_integrity_err);
+	obj_add_uint128(r, "num_err_info_log_entries", num_err_info_log_entries);
+	obj_add_uint128(r, "total_end_grp_cap", total_end_grp_cap);
+	obj_add_uint128(r, "unalloc_end_grp_cap", unalloc_end_grp_cap);
+
+	json_print(r);
+}
+
+static void json_smart_log(struct nvme_smart_log *smart, unsigned int nsid,
+			   const char *devname)
+{
+	struct json_object *r = json_create_object();
+	int c;
+	char key[21];
+	unsigned int temperature = ((smart->temperature[1] << 8) |
+		smart->temperature[0]);
+	nvme_uint128_t data_units_read = le128_to_cpu(smart->data_units_read);
+	nvme_uint128_t data_units_written = le128_to_cpu(smart->data_units_written);
+	nvme_uint128_t host_read_commands = le128_to_cpu(smart->host_reads);
+	nvme_uint128_t host_write_commands = le128_to_cpu(smart->host_writes);
+	nvme_uint128_t controller_busy_time = le128_to_cpu(smart->ctrl_busy_time);
+	nvme_uint128_t power_cycles = le128_to_cpu(smart->power_cycles);
+	nvme_uint128_t power_on_hours = le128_to_cpu(smart->power_on_hours);
+	nvme_uint128_t unsafe_shutdowns = le128_to_cpu(smart->unsafe_shutdowns);
+	nvme_uint128_t media_errors = le128_to_cpu(smart->media_errors);
+	nvme_uint128_t num_err_log_entries = le128_to_cpu(smart->num_err_log_entries);
+
+	if (human()) {
+		struct json_object *crt = json_create_object();
+
+		obj_add_int(crt, "value", smart->critical_warning);
+		obj_add_int(crt, "available_spare", smart->critical_warning & 1);
+		obj_add_int(crt, "temp_threshold", (smart->critical_warning & 2) >> 1);
+		obj_add_int(crt, "reliability_degraded", (smart->critical_warning & 4) >> 2);
+		obj_add_int(crt, "ro", (smart->critical_warning & 8) >> 3);
+		obj_add_int(crt, "vmbu_failed", (smart->critical_warning & 0x10) >> 4);
+		obj_add_int(crt, "pmr_ro", (smart->critical_warning & 0x20) >> 5);
+
+		obj_add_obj(r, "critical_warning", crt);
+	} else {
+		obj_add_int(r, "critical_warning", smart->critical_warning);
+	}
+
+	obj_add_int(r, "temperature", temperature);
+	obj_add_int(r, "avail_spare", smart->avail_spare);
+	obj_add_int(r, "spare_thresh", smart->spare_thresh);
+	obj_add_int(r, "percent_used", smart->percent_used);
+	obj_add_int(r, "endurance_grp_critical_warning_summary", smart->endu_grp_crit_warn_sumry);
+	obj_add_uint128(r, "data_units_read", data_units_read);
+	obj_add_uint128(r, "data_units_written", data_units_written);
+	obj_add_uint128(r, "host_read_commands", host_read_commands);
+	obj_add_uint128(r, "host_write_commands", host_write_commands);
+	obj_add_uint128(r, "controller_busy_time", controller_busy_time);
+	obj_add_uint128(r, "power_cycles", power_cycles);
+	obj_add_uint128(r, "power_on_hours", power_on_hours);
+	obj_add_uint128(r, "unsafe_shutdowns", unsafe_shutdowns);
+	obj_add_uint128(r, "media_errors", media_errors);
+	obj_add_uint128(r, "num_err_log_entries", num_err_log_entries);
+	obj_add_uint(r, "warning_temp_time", le32_to_cpu(smart->warning_temp_time));
+	obj_add_uint(r, "critical_comp_time", le32_to_cpu(smart->critical_comp_time));
+
+	for (c = 0; c < 8; c++) {
+		__s32 temp = le16_to_cpu(smart->temp_sensor[c]);
+
+		if (temp == 0)
+			continue;
+
+		sprintf(key, "temperature_sensor_%d",c+1);
+		obj_add_int(r, key, temp);
+	}
+
+	obj_add_uint(r, "thm_temp1_trans_count", le32_to_cpu(smart->thm_temp1_trans_count));
+	obj_add_uint(r, "thm_temp2_trans_count", le32_to_cpu(smart->thm_temp2_trans_count));
+	obj_add_uint(r, "thm_temp1_total_time", le32_to_cpu(smart->thm_temp1_total_time));
+	obj_add_uint(r, "thm_temp2_total_time", le32_to_cpu(smart->thm_temp2_total_time));
+
+	json_print(r);
+}
+
+static void json_ana_log(struct nvme_ana_log *ana_log, const char *devname,
+			 size_t len)
+{
+	int offset = sizeof(struct nvme_ana_log);
+	struct nvme_ana_log *hdr = ana_log;
+	struct nvme_ana_group_desc *ana_desc;
+	struct json_object *desc_list = json_create_array();
+	struct json_object *ns_list;
+	struct json_object *desc;
+	struct json_object *nsid;
+	struct json_object *r = json_create_object();
+	size_t nsid_buf_size;
+	void *base = ana_log;
+	__u32 nr_nsids;
+	int i, j;
+
+	obj_add_str(r, "Asymmetric Namespace Access Log for NVMe device", devname);
+	obj_add_uint64(r, "chgcnt", le64_to_cpu(hdr->chgcnt));
+	obj_add_uint(r, "ngrps", le16_to_cpu(hdr->ngrps));
+
+	for (i = 0; i < le16_to_cpu(ana_log->ngrps); i++) {
+		desc = json_create_object();
+		ana_desc = base + offset;
+		nr_nsids = le32_to_cpu(ana_desc->nnsids);
+		nsid_buf_size = nr_nsids * sizeof(__le32);
+
+		offset += sizeof(*ana_desc);
+		obj_add_uint(desc, "grpid", le32_to_cpu(ana_desc->grpid));
+		obj_add_uint(desc, "nnsids", le32_to_cpu(ana_desc->nnsids));
+		obj_add_uint64(desc, "chgcnt", le64_to_cpu(ana_desc->chgcnt));
+		obj_add_str(desc, "state", nvme_ana_state_to_string(ana_desc->state));
+
+		ns_list = json_create_array();
+		for (j = 0; j < le32_to_cpu(ana_desc->nnsids); j++) {
+			nsid = json_create_object();
+			obj_add_uint(nsid, "nsid", le32_to_cpu(ana_desc->nsids[j]));
+			array_add_obj(ns_list, nsid);
+		}
+		obj_add_array(desc, "NSIDS", ns_list);
+		offset += nsid_buf_size;
+		array_add_obj(desc_list, desc);
+	}
+
+	obj_add_array(r, "ANA DESC LIST ", desc_list);
+
+	json_print(r);
+}
+
+static void json_select_result(enum nvme_features_id fid, __u32 result)
+{
+	struct json_object *r = json_r ? json_r : json_create_object();
+	char json_str[STR_LEN];
+	struct json_object *feature = json_create_array();
+
+	if (result & 0x1)
+		array_add_str(feature, "saveable");
+	if (result & 0x2)
+		array_add_str(feature, "per-namespace");
+	if (result & 0x4)
+		array_add_str(feature, "changeable");
+
+	sprintf(json_str, "Feature: %#0*x: select", fid ? 4 : 2, fid);
+	obj_add_array(r, json_str, feature);
+
+	json_print(r);
+}
+
+static void json_self_test_log(struct nvme_self_test_log *self_test, __u8 dst_entries,
+			       __u32 size, const char *devname)
+{
+	struct json_object *valid_attrs;
+	struct json_object *r = json_create_object();
+	struct json_object *valid = json_create_array();
+	int i;
+	__u32 num_entries = min(dst_entries, NVME_LOG_ST_MAX_RESULTS);
+
+	obj_add_int(r, "Current Device Self-Test Operation", self_test->current_operation);
+	obj_add_int(r, "Current Device Self-Test Completion", self_test->completion);
+
+	for (i = 0; i < num_entries; i++) {
+		valid_attrs = json_create_object();
+		obj_add_int(valid_attrs, "Self test result", self_test->result[i].dsts & 0xf);
+
+		if ((self_test->result[i].dsts & 0xf) == 0xf)
+			goto add;
+
+		obj_add_int(valid_attrs, "Self test code",
+			self_test->result[i].dsts >> 4);
+		obj_add_int(valid_attrs, "Segment number",
+			self_test->result[i].seg);
+		obj_add_int(valid_attrs, "Valid Diagnostic Information",
+			self_test->result[i].vdi);
+		obj_add_uint64(valid_attrs, "Power on hours",
+			       le64_to_cpu(self_test->result[i].poh));
+
+		if (self_test->result[i].vdi & NVME_ST_VALID_DIAG_INFO_NSID)
+			obj_add_uint(valid_attrs, "Namespace Identifier",
+				     le32_to_cpu(self_test->result[i].nsid));
+
+		if (self_test->result[i].vdi & NVME_ST_VALID_DIAG_INFO_FLBA)
+			obj_add_uint64(valid_attrs, "Failing LBA",
+				       le64_to_cpu(self_test->result[i].flba));
+
+		if (self_test->result[i].vdi & NVME_ST_VALID_DIAG_INFO_SCT)
+			obj_add_int(valid_attrs, "Status Code Type", self_test->result[i].sct);
+
+		if (self_test->result[i].vdi & NVME_ST_VALID_DIAG_INFO_SC)
+			obj_add_int(valid_attrs, "Status Code", self_test->result[i].sc);
+
+		obj_add_int(valid_attrs, "Vendor Specific",
+			    self_test->result[i].vs[1] << 8 | self_test->result[i].vs[0]);
+
+add:
+		array_add_obj(valid, valid_attrs);
+	}
+
+	obj_add_array(r, "List of Valid Reports", valid);
+
+	json_print(r);
+}
+
+static void json_registers_cap(struct nvme_bar_cap *cap, struct json_object *r)
+{
+	char json_str[STR_LEN];
+	struct json_object *cssa = json_create_array();
+	struct json_object *csso = json_create_object();
+	struct json_object *amsa = json_create_array();
+	struct json_object *amso = json_create_object();
+
+	sprintf(json_str, "%"PRIx64"", *(uint64_t *)cap);
+	obj_add_str(r, "cap", json_str);
+
+	obj_add_str(r, "Controller Ready With Media Support (CRWMS)",
+		     cap->crwms ? "Supported" : "Not supported");
+	obj_add_str(r, "Controller Ready Independent of Media Support (CRIMS)",
+		     cap->crims ? "Supported" : "Not supported");
+	obj_add_str(r, "NVM Subsystem Shutdown Supported (NSSS)",
+		     cap->nsss ? "Supported" : "Not supported");
+	obj_add_str(r, "Controller Memory Buffer Supported (CMBS):",
+		     cap->cmbs ? "Supported" : "Not supported");
+	obj_add_str(r, "Persistent Memory Region Supported (PMRS)",
+		     cap->pmrs ? "Supported" : "Not supported");
+
+	sprintf(json_str, "%u bytes", 1 << (12 + cap->mpsmax));
+	obj_add_str(r, "Memory Page Size Maximum (MPSMAX)", json_str);
+
+	sprintf(json_str, "%u bytes", 1 << (12 + cap->mpsmin));
+	obj_add_str(r, "Memory Page Size Minimum (MPSMIN)", json_str);
+
+	obj_add_str(r, "Controller Power Scope (CPS)", !cap->cps ? "Not Reported" : cap->cps == 1 ?
+		     "Controller scope" : cap->cps == 2 ? "Domain scope" : "NVM subsystem scope");
+	obj_add_str(r, "Boot Partition Support (BPS)", cap->bps ? "Yes" : "No");
+
+	obj_add_array(r, "Command Sets Supported (CSS)", cssa);
+	obj_add_str(csso, "NVM command set", cap->css & 1 ? "Supported" : "Not supported");
+	obj_add_str(csso, "One or more I/O Command Sets",
+		    cap->css & 0x40 ? "Supported" : "Not supported");
+	obj_add_str(csso, cap->css & 0x80 ? "Only Admin Command Set" : "I/O Command Set",
+		    "Supported");
+	array_add_obj(cssa, csso);
+
+	obj_add_str(r, "NVM Subsystem Reset Supported (NSSRS)", cap->nssrs ? "Yes" : "No");
+
+	sprintf(json_str, "%u bytes", 1 << (2 + cap->dstrd));
+	obj_add_str(r, "Doorbell Stride (DSTRD)", json_str);
+
+	sprintf(json_str, "%u ms", MS500_TO_MS(cap->to));
+	obj_add_str(r, "Timeout (TO)", json_str);
+
+	obj_add_array(r, "Arbitration Mechanism Supported (AMS)", amsa);
+	obj_add_str(amso, "Weighted Round Robin with Urgent Priority Class",
+		    cap->ams & 2 ? "Supported" : "Not supported");
+	array_add_obj(amsa, amso);
+
+	obj_add_str(r, "Contiguous Queues Required (CQR)", cap->cqr ? "Yes" : "No");
+	obj_add_uint(r, "Maximum Queue Entries Supported (MQES)", cap->mqes + 1);
+}
+
+static void json_registers_version(__u32 vs, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%x", vs);
+	obj_add_str(r, "Version", json_str);
+
+	sprintf(json_str, "%d.%d", (vs & 0xffff0000) >> 16, (vs & 0x0000ff00) >> 8);
+	obj_add_str(r, "NVMe specification", json_str);
+}
+
+static void json_registers_intms(__u32 intms, struct json_object *r)
+{
+	obj_add_uint_x(r, "intms", intms);
+
+	obj_add_uint_x(r, "Interrupt Vector Mask Set (IVMS)", intms);
+}
+
+static void json_registers_intmc(__u32 intmc, struct json_object *r)
+{
+	obj_add_uint_x(r, "intmc", intmc);
+
+	obj_add_uint_x(r, "Interrupt Vector Mask Set (IVMC)", intmc);
+}
+
+static void json_registers_cc_ams(__u8 ams, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	switch (ams) {
+	case 0:
+		sprintf(json_str, "Round Robin");
+		break;
+	case 1:
+		sprintf(json_str, "Weighted Round Robin with Urgent Priority Class");
+		break;
+	case 7:
+		sprintf(json_str, "Vendor Specific");
+		break;
+	default:
+		sprintf(json_str, "%s", "Reserved");
+		break;
+	}
+
+	obj_add_str(r, "Arbitration Mechanism Selected (AMS)", json_str);
+}
+
+static void json_registers_cc_shn(__u8 shn, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	switch (shn) {
+	case 0:
+		sprintf(json_str, "No notification; no effect");
+		break;
+	case 1:
+		sprintf(json_str, "Normal shutdown notification");
+		break;
+	case 2:
+		sprintf(json_str, "Abrupt shutdown notification");
+		break;
+	default:
+		sprintf(json_str, "%s", "Reserved");
+		break;
+	}
+
+	obj_add_str(r, "Shutdown Notification (SHN)", json_str);
+}
+
+static void json_registers_cc(__u32 cc, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%x", cc);
+	obj_add_str(r, "cc", json_str);
+
+	obj_add_str(r, "Controller Ready Independent of Media Enable (CRIME)",
+		     NVME_CC_CRIME(cc) ? "Enabled" : "Disabled");
+
+	sprintf(json_str, "%u bytes", POWER_OF_TWO(NVME_GET(cc, CC_IOCQES)));
+	obj_add_str(r, "I/O Completion Queue Entry Size (IOCQES): ", json_str);
+
+	sprintf(json_str, "%u bytes", POWER_OF_TWO(NVME_GET(cc, CC_IOSQES)));
+	obj_add_str(r, "I/O Submission Queue Entry Size (IOSQES)", json_str);
+
+	json_registers_cc_shn((cc & 0xc000) >> NVME_CC_SHN_SHIFT, r);
+	json_registers_cc_ams((cc & 0x3800) >> NVME_CC_AMS_SHIFT, r);
+
+	sprintf(json_str, "%u bytes", POWER_OF_TWO(12 + NVME_GET(cc, CC_MPS)));
+	obj_add_str(r, "Memory Page Size (MPS)", json_str);
+
+	obj_add_str(r, "I/O Command Set Selected (CSS)", (cc & 0x70) == 0x00 ? "NVM Command Set" :
+		     (cc & 0x70) == 0x60 ? "All supported I/O Command Sets" :
+		     (cc & 0x70) == 0x70 ? "Admin Command Set only" : "Reserved");
+	obj_add_str(r, "Enable (EN)", cc & 1 ? "Yes" : "No");
+}
+
+static void json_registers_csts_shst(__u8 shst, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	switch (shst) {
+	case 0:
+		sprintf(json_str, "Normal operation (no shutdown has been requested)");
+		break;
+	case 1:
+		sprintf(json_str, "Shutdown processing occurring");
+		break;
+	case 2:
+		sprintf(json_str, "Shutdown processing complete");
+		break;
+	default:
+		sprintf(json_str, "%s", "Reserved");
+		break;
+	}
+
+	obj_add_str(r, "Shutdown Status (SHST)", json_str);
+}
+
+static void json_registers_csts(__u32 csts, struct json_object *r)
+{
+	obj_add_uint_x(r, "csts", csts);
+
+	obj_add_str(r, "Processing Paused (PP)", csts & 0x20 ? "Yes" : "No");
+	obj_add_str(r, "NVM Subsystem Reset Occurred (NSSRO)", csts & 0x10 ? "Yes" : "No");
+
+	json_registers_csts_shst((csts & 0xc) >> 2, r);
+
+	obj_add_str(r, "Controller Fatal Status (CFS)", csts & 2 ? "True" : "False");
+	obj_add_str(r, "Ready (RDY)", csts & 1 ? "Yes" : "No");
+}
+
+static void json_registers_nssr(__u32 nssr, struct json_object *r)
+{
+	obj_add_uint_x(r, "nssr", nssr);
+	obj_add_uint(r, "NVM Subsystem Reset Control (NSSRC)", nssr);
+}
+
+static void json_registers_crto(__u32 crto, struct json_object *r)
+{
+	obj_add_uint_x(r, "crto", crto);
+
+	obj_add_int_secs(r, "CRIMT", MS500_TO_SEC(NVME_CRTO_CRIMT(crto)));
+	obj_add_int_secs(r, "CRWMT", MS500_TO_SEC(NVME_CRTO_CRWMT(crto)));
+}
+
+static void json_registers_aqa(uint32_t aqa, struct json_object *r)
+{
+	obj_add_uint_x(r, "aqa", aqa);
+	obj_add_uint(r, "Admin Completion Queue Size (ACQS)", ((aqa & 0xfff0000) >> 16) + 1);
+	obj_add_uint(r, "Admin Submission Queue Size (ASQS)", (aqa & 0xfff) + 1);
+}
+
+static void json_registers_asq(uint64_t asq, struct json_object *r)
+{
+	obj_add_prix64(r, "asq", asq);
+	obj_add_prix64(r, "Admin Submission Queue Base (ASQB)", asq);
+}
+
+static void json_registers_acq(uint64_t acq, struct json_object *r)
+{
+	obj_add_prix64(r, "acq", acq);
+	obj_add_prix64(r, "Admin Completion Queue Base (ACQB)", acq);
+}
+
+static void json_registers_cmbloc(uint32_t cmbloc, void *bar, struct json_object *r)
+{
+	uint32_t cmbsz = mmio_read32(bar + NVME_REG_CMBSZ);
+
+	obj_add_uint_x(r, "cmbloc", cmbloc);
+
+	if (!cmbsz) {
+		obj_add_result(r, "Controller Memory Buffer feature is not supported");
+		return;
+	}
+
+	obj_add_uint_0x(r, "Offset (OFST) (See cmbsz.szu for granularity)",
+			 (cmbloc & 0xfffff000) >> 12);
+	obj_add_int(r, "CMB Queue Dword Alignment (CQDA)", (cmbloc & 0x100) >> 8);
+	obj_add_str(r, "CMB Data Metadata Mixed Memory Support (CDMMMS)",
+		     (cmbloc & 0x00000080) >> 7 ? "Not enforced" : "Enforced");
+	obj_add_str(r, "CMB Data Pointer and Command Independent Locations Support (CDPCILS)",
+		     (cmbloc & 0x00000040) >> 6 ? "Not enforced" : "Enforced");
+	obj_add_str(r, "CMB Data Pointer Mixed Locations Support (CDPMLS)",
+		     (cmbloc & 0x00000020) >> 5 ? "Not enforced" : "Enforced");
+	obj_add_str(r, "CMB Queue Physically Discontiguous Support (CQPDS)",
+		     (cmbloc & 0x00000010) >> 4 ? "Not enforced" : "Enforced");
+	obj_add_str(r, "CMB Queue Mixed Memory Support (CQMMS)",
+		     (cmbloc & 0x00000008) >> 3 ? "Not enforced" : "Enforced");
+	obj_add_uint_0x(r, "Base Indicator Register (BIR)", (cmbloc & 0x00000007));
+}
+
+static void json_registers_cmbsz(uint32_t cmbsz, struct json_object *r)
+{
+	obj_add_uint_x(r, "cmbsz", cmbsz);
+
+	if (!cmbsz) {
+		obj_add_result(r, "Controller Memory Buffer feature is not supported");
+		return;
+	}
+
+	obj_add_uint(r, "Size (SZ)", (cmbsz & 0xfffff000) >> 12);
+	obj_add_str(r, "Size Units (SZU)", nvme_register_szu_to_string((cmbsz & 0xf00) >> 8));
+	obj_add_str(r, "Write Data Support (WDS)", cmbsz & 0x10 ? "Supported" : "Not supported");
+	obj_add_str(r, "Read Data Support (RDS)", cmbsz & 8 ? "Supported" : "Not supported");
+	obj_add_str(r, "PRP SGL List Support (LISTS)", cmbsz & 4 ? "Supported" : "Not supported");
+	obj_add_str(r, "Completion Queue Support (CQS)", cmbsz & 2 ? "Supported" : "Not supported");
+	obj_add_str(r, "Submission Queue Support (SQS)", cmbsz & 1 ? "Supported" : "Not supported");
+}
+
+static void json_registers_bpinfo_brs(__u8 brs, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	switch (brs) {
+	case 0:
+		sprintf(json_str, "No Boot Partition read operation requested");
+		break;
+	case 1:
+		sprintf(json_str, "Boot Partition read in progress");
+		break;
+	case 2:
+		sprintf(json_str, "Boot Partition read completed successfully");
+		break;
+	case 3:
+		sprintf(json_str, "Error completing Boot Partition read");
+		break;
+	default:
+		sprintf(json_str, "%s", "Invalid");
+		break;
+	}
+
+	obj_add_str(r, "Boot Read Status (BRS)", json_str);
+}
+
+static void json_registers_bpinfo(uint32_t bpinfo, struct json_object *r)
+{
+	obj_add_uint_x(r, "bpinfo", bpinfo);
+
+	obj_add_uint(r, "Active Boot Partition ID (ABPID)", (bpinfo & 0x80000000) >> 31);
+	json_registers_bpinfo_brs((bpinfo & 0x3000000) >> 24, r);
+	obj_add_uint(r, "Boot Partition Size (BPSZ)", bpinfo & 0x7fff);
+}
+
+static void json_registers_bprsel(uint32_t bprsel, struct json_object *r)
+{
+	obj_add_uint_x(r, "bprsel", bprsel);
+
+	obj_add_uint(r, "Boot Partition Identifier (BPID)", (bprsel & 0x80000000) >> 31);
+	obj_add_uint_x(r, "Boot Partition Read Offset (BPROF)", (bprsel & 0x3ffffc00) >> 10);
+	obj_add_uint_x(r, "Boot Partition Read Size (BPRSZ)", bprsel & 0x3ff);
+}
+
+static void json_registers_bpmbl(uint64_t bpmbl, struct json_object *r)
+{
+	obj_add_prix64(r, "bpmbl", bpmbl);
+
+	obj_add_prix64(r, "Boot Partition Memory Buffer Base Address (BMBBA)", bpmbl);
+}
+
+static void json_registers_cmbmsc(uint64_t cmbmsc, struct json_object *r)
+{
+	obj_add_prix64(r, "cmbmsc", cmbmsc);
+
+	obj_add_prix64(r, "Controller Base Address (CBA)", (cmbmsc & 0xfffffffffffff000) >> 12);
+	obj_add_prix64(r, "Controller Memory Space Enable (CMSE)", (cmbmsc & 2) >> 1);
+	obj_add_str(r, "Capabilities Registers Enabled (CRE)",
+		     cmbmsc & 1 ? "Enabled" : "Not enabled");
+}
+
+static void json_registers_cmbsts(uint32_t cmbsts , struct json_object *r)
+{
+	obj_add_uint_x(r, "cmbsts", cmbsts);
+
+	obj_add_uint_x(r, "Controller Base Address Invalid (CBAI)", cmbsts & 1);
+}
+
+static void json_registers_pmrcap(uint32_t pmrcap, struct json_object *r)
+{
+	obj_add_uint_x(r, "pmrcap", pmrcap);
+
+	obj_add_str(r, "Controller Memory Space Supported (CMSS)",
+	       ((pmrcap & 0x01000000) >> 24) ? "Supported" : "Not supported");
+	obj_add_uint_x(r, "Persistent Memory Region Timeout (PMRTO)", (pmrcap & 0xff0000) >> 16);
+	obj_add_uint_x(r, "Persistent Memory Region Write Barrier Mechanisms (PMRWBM)",
+			(pmrcap & 0x3c00) >> 10);
+	obj_add_str(r, "Persistent Memory Region Time Units (PMRTU)",
+		     (pmrcap & 0x300) >> 8 ? "minutes" : "500 milliseconds");
+	obj_add_uint_x(r, "Base Indicator Register (BIR)", (pmrcap & 0xe0) >> 5);
+	obj_add_str(r, "Write Data Support (WDS)", pmrcap & 0x10 ? "Supported" : "Not supported");
+	obj_add_str(r, "Read Data Support (RDS)", pmrcap & 8 ? "Supported" : "Not supported");
+}
+
+static void json_registers_pmrctl(uint32_t pmrctl, struct json_object *r)
+{
+	obj_add_uint_x(r, "pmrctl", pmrctl);
+
+	obj_add_str(r, "Enable (EN)", pmrctl & 1 ? "Ready" : "Disabled");
+}
+
+static void json_registers_pmrsts(uint32_t pmrsts, void *bar, struct json_object *r)
+{
+	uint32_t pmrctl = mmio_read32(bar + NVME_REG_PMRCTL);
+
+	obj_add_uint_x(r, "pmrsts", pmrsts);
+
+	obj_add_uint_x(r, "Controller Base Address Invalid (CBAI)", (pmrsts & 0x1000) >> 12);
+	obj_add_str(r, "Health Status (HSTS)",
+		     nvme_register_pmr_hsts_to_string((pmrsts & 0xe00) >> 9));
+	obj_add_str(r, "Not Ready (NRDY)",
+		     !(pmrsts & 0x100) && (pmrctl & 1) ? "Ready" : "Not ready");
+	obj_add_uint_x(r, "Error (ERR)", pmrsts & 0xff);
+}
+
+static void json_registers_pmrebs(uint32_t pmrebs, struct json_object *r)
+{
+	obj_add_uint_x(r, "pmrebs", pmrebs);
+
+	obj_add_uint_x(r, "PMR Elasticity Buffer Size Base (PMRWBZ)", (pmrebs & 0xffffff00) >> 8);
+	obj_add_str(r, "Read Bypass Behavior", pmrebs & 0x10 ? "Shall" : "May");
+	obj_add_str(r, "PMR Elasticity Buffer Size Units (PMRSZU)",
+		     nvme_register_pmr_pmrszu_to_string(pmrebs & 0xf));
+}
+
+static void json_registers_pmrswtp(uint32_t pmrswtp, struct json_object *r)
+{
+	obj_add_uint_x(r, "pmrswtp", pmrswtp);
+
+	obj_add_uint_x(r, "PMR Sustained Write Throughput (PMRSWTV)", (pmrswtp & 0xffffff00) >> 8);
+	obj_add_key(r, "PMR Sustained Write Throughput Units (PMRSWTU)", "%s/second",
+		     nvme_register_pmr_pmrszu_to_string(pmrswtp & 0xf));
+}
+
+static void json_registers_pmrmscl(uint32_t pmrmscl, struct json_object *r)
+{
+	obj_add_uint_nx(r, "pmrmscl", pmrmscl);
+
+	obj_add_uint_nx(r, "Controller Base Address (CBA)", (pmrmscl & 0xfffff000) >> 12);
+	obj_add_uint_nx(r, "Controller Memory Space Enable (CMSE)", (pmrmscl & 2) >> 1);
+}
+
+static void json_registers_pmrmscu(uint32_t pmrmscu, struct json_object *r)
+{
+	obj_add_uint_nx(r, "pmrmscu", pmrmscu);
+
+	obj_add_uint_nx(r, "Controller Base Address (CBA)", pmrmscu);
+}
+
+static void json_registers_unknown(int offset, uint64_t value64, struct json_object *r)
+{
+	obj_add_uint_02x(r, "unknown property", offset);
+	obj_add_str(r, "name", nvme_register_to_string(offset));
+	obj_add_prix64(r, "value", value64);
+}
+
+static void json_single_property_human(int offset, uint64_t value64, struct json_object *r)
+{
+	uint32_t value32 = (uint32_t)value64;
+
+	switch (offset) {
+	case NVME_REG_CAP:
+		json_registers_cap((struct nvme_bar_cap *)&value64, r);
+		break;
+	case NVME_REG_VS:
+		json_registers_version(value32, r);
+		break;
+	case NVME_REG_CC:
+		json_registers_cc(value32, r);
+		break;
+	case NVME_REG_CSTS:
+		json_registers_csts(value32, r);
+		break;
+	case NVME_REG_NSSR:
+		json_registers_nssr(value32, r);
+		break;
+	case NVME_REG_CRTO:
+		json_registers_crto(value32, r);
+		break;
+	default:
+		json_registers_unknown(offset, value64, r);
+		break;
+	}
+}
+
+static void json_single_property(int offset, uint64_t value64)
+{
+	struct json_object *r = json_create_object();
+	char json_str[STR_LEN];
+	uint32_t value32 = (uint32_t)value64;
+
+	if (human()) {
+		json_single_property_human(offset, value64, r);
+	} else {
+		sprintf(json_str, "0x%02x", offset);
+		obj_add_str(r, "property", json_str);
+
+		obj_add_str(r, "name", nvme_register_to_string(offset));
+
+		if (nvme_is_64bit_reg(offset))
+			sprintf(json_str, "%"PRIx64"", value64);
+		else
+			sprintf(json_str, "%x", value32);
+
+		obj_add_str(r, "value", json_str);
+	}
+
+	json_print(r);
+}
+
+struct json_object* json_effects_log(enum nvme_csi csi,
+			     struct nvme_cmd_effects_log *effects_log)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *acs = json_create_object();
+	struct json_object *iocs = json_create_object();
+	unsigned int opcode;
+	char key[128];
+	__u32 effect;
+
+	obj_add_uint(r, "command_set_identifier", csi);
+
+	for (opcode = 0; opcode < 256; opcode++) {
+		effect = le32_to_cpu(effects_log->acs[opcode]);
+		if (effect & NVME_CMD_EFFECTS_CSUPP) {
+			sprintf(key, "ACS_%u (%s)", opcode,
+				nvme_cmd_to_string(1, opcode));
+			obj_add_uint(acs, key, effect);
+		}
+	}
+
+	obj_add_obj(r, "admin_cmd_set", acs);
+
+	for (opcode = 0; opcode < 256; opcode++) {
+		effect = le32_to_cpu(effects_log->iocs[opcode]);
+		if (effect & NVME_CMD_EFFECTS_CSUPP) {
+			sprintf(key, "IOCS_%u (%s)", opcode,
+				nvme_cmd_to_string(0, opcode));
+			obj_add_uint(iocs, key, effect);
+		}
+	}
+
+	obj_add_obj(r, "io_cmd_set", iocs);
+	return r;
+}
+
+static void json_effects_log_list(struct list_head *list)
+{
+	struct json_object *r = json_create_array();
+	nvme_effects_log_node_t *node;
+
+	list_for_each(list, node, node) {
+		struct json_object *json_page =
+			json_effects_log(node->csi, &node->effects);
+		array_add_obj(r, json_page);
+	}
+
+	json_print(r);
+}
+
+static void json_sanitize_log(struct nvme_sanitize_log_page *sanitize_log,
+			      const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *dev = json_create_object();
+	struct json_object *sstat = json_create_object();
+	const char *status_str;
+	char str[128];
+	__u16 status = le16_to_cpu(sanitize_log->sstat);
+
+	obj_add_int(dev, "sprog", le16_to_cpu(sanitize_log->sprog));
+	obj_add_int(sstat, "global_erased", (status & NVME_SANITIZE_SSTAT_GLOBAL_DATA_ERASED) >> 8);
+	obj_add_int(sstat, "no_cmplted_passes",
+		    (status >> NVME_SANITIZE_SSTAT_COMPLETED_PASSES_SHIFT) &
+		    NVME_SANITIZE_SSTAT_COMPLETED_PASSES_MASK);
+
+	status_str = nvme_sstat_status_to_string(status);
+	sprintf(str, "(%d) %s", status & NVME_SANITIZE_SSTAT_STATUS_MASK,
+		status_str);
+	obj_add_str(sstat, status_str, str);
+
+	obj_add_obj(dev, "sstat", sstat);
+	obj_add_uint(dev, "cdw10_info", le32_to_cpu(sanitize_log->scdw10));
+	obj_add_uint(dev, "time_over_write", le32_to_cpu(sanitize_log->eto));
+	obj_add_uint(dev, "time_block_erase", le32_to_cpu(sanitize_log->etbe));
+	obj_add_uint(dev, "time_crypto_erase", le32_to_cpu(sanitize_log->etce));
+	obj_add_uint(dev, "time_over_write_no_dealloc", le32_to_cpu(sanitize_log->etond));
+	obj_add_uint(dev, "time_block_erase_no_dealloc", le32_to_cpu(sanitize_log->etbend));
+	obj_add_uint(dev, "time_crypto_erase_no_dealloc", le32_to_cpu(sanitize_log->etcend));
+
+	obj_add_obj(r, devname, dev);
+
+	json_print(r);
+}
+
+static void json_predictable_latency_per_nvmset(
+		struct nvme_nvmset_predictable_lat_log *plpns_log,
+		__u16 nvmset_id, const char *devname)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "nvmset_id", le16_to_cpu(nvmset_id));
+	obj_add_uint(r, "status", plpns_log->status);
+	obj_add_uint(r, "event_type", le16_to_cpu(plpns_log->event_type));
+	obj_add_uint64(r, "dtwin_reads_typical", le64_to_cpu(plpns_log->dtwin_rt));
+	obj_add_uint64(r, "dtwin_writes_typical", le64_to_cpu(plpns_log->dtwin_wt));
+	obj_add_uint64(r, "dtwin_time_maximum", le64_to_cpu(plpns_log->dtwin_tmax));
+	obj_add_uint64(r, "ndwin_time_minimum_high", le64_to_cpu(plpns_log->ndwin_tmin_hi));
+	obj_add_uint64(r, "ndwin_time_minimum_low", le64_to_cpu(plpns_log->ndwin_tmin_lo));
+	obj_add_uint64(r, "dtwin_reads_estimate", le64_to_cpu(plpns_log->dtwin_re));
+	obj_add_uint64(r, "dtwin_writes_estimate", le64_to_cpu(plpns_log->dtwin_we));
+	obj_add_uint64(r, "dtwin_time_estimate", le64_to_cpu(plpns_log->dtwin_te));
+
+	json_print(r);
+}
+
+static void json_predictable_latency_event_agg_log(
+		struct nvme_aggregate_predictable_lat_event *pea_log,
+		__u64 log_entries, __u32 size, const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid_attrs;
+	struct json_object *valid = json_create_array();
+	__u64 num_entries = le64_to_cpu(pea_log->num_entries);
+	__u64 num_iter = min(num_entries, log_entries);
+
+	obj_add_uint64(r, "num_entries_avail", num_entries);
+
+	for (int i = 0; i < num_iter; i++) {
+		valid_attrs = json_create_object();
+		obj_add_uint(valid_attrs, "entry", le16_to_cpu(pea_log->entries[i]));
+		array_add_obj(valid, valid_attrs);
+	}
+
+	obj_add_array(r, "list_of_entries", valid);
+
+	json_print(r);
+}
+
+static void json_add_bitmap(int i, __u8 seb, struct json_object *r)
+{
+	char evt_str[50];
+	char key[128];
+
+	for (int bit = 0; bit < 8; bit++) {
+		if (nvme_pel_event_to_string(bit + i * 8)) {
+			sprintf(key, "bitmap_%x", (bit + i * 8));
+			if ((seb >> bit) & 0x1)
+				snprintf(evt_str, sizeof(evt_str), "Support %s",
+					 nvme_pel_event_to_string(bit + i * 8));
+			obj_add_str(r, key, evt_str);
+		}
+	}
+}
+
+static void json_pevent_log_head(struct nvme_persistent_event_log *pevent_log_head,
+				 struct json_object *r)
+{
+	int i;
+	char sn[sizeof(pevent_log_head->sn) + 1];
+	char mn[sizeof(pevent_log_head->mn) + 1];
+	char subnqn[sizeof(pevent_log_head->subnqn) + 1];
+
+	snprintf(sn, sizeof(sn), "%-.*s", (int)sizeof(pevent_log_head->sn), pevent_log_head->sn);
+	snprintf(mn, sizeof(mn), "%-.*s", (int)sizeof(pevent_log_head->mn), pevent_log_head->mn);
+	snprintf(subnqn, sizeof(subnqn), "%-.*s", (int)sizeof(pevent_log_head->subnqn),
+		 pevent_log_head->subnqn);
+
+	obj_add_uint(r, "log_id", pevent_log_head->lid);
+	obj_add_uint(r, "total_num_of_events", le32_to_cpu(pevent_log_head->tnev));
+	obj_add_uint64(r, "total_log_len", le64_to_cpu(pevent_log_head->tll));
+	obj_add_uint(r, "log_revision", pevent_log_head->rv);
+	obj_add_uint(r, "log_header_len", le16_to_cpu(pevent_log_head->lhl));
+	obj_add_uint64(r, "timestamp", le64_to_cpu(pevent_log_head->ts));
+	obj_add_uint128(r, "power_on_hours", le128_to_cpu(pevent_log_head->poh));
+	obj_add_uint64(r, "power_cycle_count", le64_to_cpu(pevent_log_head->pcc));
+	obj_add_uint(r, "pci_vid", le16_to_cpu(pevent_log_head->vid));
+	obj_add_uint(r, "pci_ssvid", le16_to_cpu(pevent_log_head->ssvid));
+	obj_add_str(r, "sn", sn);
+	obj_add_str(r, "mn", mn);
+	obj_add_str(r, "subnqn", subnqn);
+	obj_add_uint(r, "gen_number", le16_to_cpu(pevent_log_head->gen_number));
+	obj_add_uint(r, "rci", le32_to_cpu(pevent_log_head->rci));
+
+	for (i = 0; i < ARRAY_SIZE(pevent_log_head->seb); i++) {
+		if (!pevent_log_head->seb[i])
+			continue;
+		json_add_bitmap(i, pevent_log_head->seb[i], r);
+	}
+}
+
+static void json_pel_smart_health(void *pevent_log_info, __u32 offset,
+				  struct json_object *valid_attrs)
+{
+	char key[128];
+	struct nvme_smart_log *smart_event = pevent_log_info + offset;
+	unsigned int temperature = (smart_event->temperature[1] << 8) | smart_event->temperature[0];
+	nvme_uint128_t data_units_read = le128_to_cpu(smart_event->data_units_read);
+	nvme_uint128_t data_units_written = le128_to_cpu(smart_event->data_units_written);
+	nvme_uint128_t host_read_commands = le128_to_cpu(smart_event->host_reads);
+	nvme_uint128_t host_write_commands = le128_to_cpu(smart_event->host_writes);
+	nvme_uint128_t controller_busy_time = le128_to_cpu(smart_event->ctrl_busy_time);
+	nvme_uint128_t power_cycles = le128_to_cpu(smart_event->power_cycles);
+	nvme_uint128_t power_on_hours = le128_to_cpu(smart_event->power_on_hours);
+	nvme_uint128_t unsafe_shutdowns = le128_to_cpu(smart_event->unsafe_shutdowns);
+	nvme_uint128_t media_errors = le128_to_cpu(smart_event->media_errors);
+	nvme_uint128_t num_err_log_entries = le128_to_cpu(smart_event->num_err_log_entries);
+	int c;
+	__s32 temp;
+
+	obj_add_int(valid_attrs, "critical_warning", smart_event->critical_warning);
+	obj_add_int(valid_attrs, "temperature", temperature);
+	obj_add_int(valid_attrs, "avail_spare", smart_event->avail_spare);
+	obj_add_int(valid_attrs, "spare_thresh", smart_event->spare_thresh);
+	obj_add_int(valid_attrs, "percent_used", smart_event->percent_used);
+	obj_add_int(valid_attrs, "endurance_grp_critical_warning_summary",
+		    smart_event->endu_grp_crit_warn_sumry);
+	obj_add_uint128(valid_attrs, "data_units_read", data_units_read);
+	obj_add_uint128(valid_attrs, "data_units_written", data_units_written);
+	obj_add_uint128(valid_attrs, "host_read_commands", host_read_commands);
+	obj_add_uint128(valid_attrs, "host_write_commands", host_write_commands);
+	obj_add_uint128(valid_attrs, "controller_busy_time", controller_busy_time);
+	obj_add_uint128(valid_attrs, "power_cycles", power_cycles);
+	obj_add_uint128(valid_attrs, "power_on_hours", power_on_hours);
+	obj_add_uint128(valid_attrs, "unsafe_shutdowns", unsafe_shutdowns);
+	obj_add_uint128(valid_attrs, "media_errors", media_errors);
+	obj_add_uint128(valid_attrs, "num_err_log_entries", num_err_log_entries);
+	obj_add_uint(valid_attrs, "warning_temp_time", le32_to_cpu(smart_event->warning_temp_time));
+	obj_add_uint(valid_attrs, "critical_comp_time",
+		     le32_to_cpu(smart_event->critical_comp_time));
+
+	for (c = 0; c < 8; c++) {
+		temp = le16_to_cpu(smart_event->temp_sensor[c]);
+		if (!temp)
+			continue;
+		sprintf(key, "temperature_sensor_%d",c + 1);
+		obj_add_int(valid_attrs, key, temp);
+	}
+
+	obj_add_uint(valid_attrs, "thm_temp1_trans_count",
+		     le32_to_cpu(smart_event->thm_temp1_trans_count));
+	obj_add_uint(valid_attrs, "thm_temp2_trans_count",
+		     le32_to_cpu(smart_event->thm_temp2_trans_count));
+	obj_add_uint(valid_attrs, "thm_temp1_total_time",
+		     le32_to_cpu(smart_event->thm_temp1_total_time));
+	obj_add_uint(valid_attrs, "thm_temp2_total_time",
+		     le32_to_cpu(smart_event->thm_temp2_total_time));
+}
+
+static void json_pel_fw_commit(void *pevent_log_info, __u32 offset, struct json_object *valid_attrs)
+{
+	char fw_str[50];
+	struct nvme_fw_commit_event *fw_commit_event = pevent_log_info + offset;
+
+	snprintf(fw_str, sizeof(fw_str), "%"PRIu64" (%s)", le64_to_cpu(fw_commit_event->old_fw_rev),
+		 util_fw_to_string((char *)&fw_commit_event->old_fw_rev));
+	obj_add_str(valid_attrs, "old_fw_rev", fw_str);
+	snprintf(fw_str, sizeof(fw_str), "%"PRIu64" (%s)", le64_to_cpu(fw_commit_event->new_fw_rev),
+		 util_fw_to_string((char *)&fw_commit_event->new_fw_rev));
+	obj_add_str(valid_attrs, "new_fw_rev", fw_str);
+	obj_add_uint(valid_attrs, "fw_commit_action", fw_commit_event->fw_commit_action);
+	obj_add_uint(valid_attrs, "fw_slot", fw_commit_event->fw_slot);
+	obj_add_uint(valid_attrs, "sct_fw", fw_commit_event->sct_fw);
+	obj_add_uint(valid_attrs, "sc_fw", fw_commit_event->sc_fw);
+	obj_add_uint(valid_attrs, "vu_assign_fw_commit_rc",
+		     le16_to_cpu(fw_commit_event->vndr_assign_fw_commit_rc));
+}
+
+static void json_pel_timestamp(void *pevent_log_info, __u32 offset, struct json_object *valid_attrs)
+{
+	struct nvme_time_stamp_change_event *ts_change_event = pevent_log_info + offset;
+
+	obj_add_uint64(valid_attrs, "prev_ts", le64_to_cpu(ts_change_event->previous_timestamp));
+	obj_add_uint64(valid_attrs, "ml_secs_since_reset",
+		       le64_to_cpu(ts_change_event->ml_secs_since_reset));
+}
+
+static void json_pel_power_on_reset(void *pevent_log_info, __u32 offset,
+				    struct json_object *valid_attrs, __le16 vsil, __le16 el)
+{
+	__u64 *fw_rev;
+	char fw_str[50];
+	struct nvme_power_on_reset_info_list *por_event;
+	__u32 por_info_len = le16_to_cpu(el) - le16_to_cpu(vsil) - sizeof(*fw_rev);
+	__u32 por_info_list = por_info_len / sizeof(*por_event);
+	int i;
+
+	fw_rev = pevent_log_info + offset;
+	snprintf(fw_str, sizeof(fw_str), "%"PRIu64" (%s)", le64_to_cpu(*fw_rev),
+		 util_fw_to_string((char *)fw_rev));
+	obj_add_str(valid_attrs, "fw_rev", fw_str);
+
+	for (i = 0; i < por_info_list; i++) {
+		por_event = pevent_log_info + offset + sizeof(*fw_rev) + i * sizeof(*por_event);
+		obj_add_uint(valid_attrs, "ctrl_id", le16_to_cpu(por_event->cid));
+		obj_add_uint(valid_attrs, "fw_act", por_event->fw_act);
+		obj_add_uint(valid_attrs, "op_in_prog", por_event->op_in_prog);
+		obj_add_uint(valid_attrs, "ctrl_power_cycle",
+			     le32_to_cpu(por_event->ctrl_power_cycle));
+		obj_add_uint64(valid_attrs, "power_on_ml_secs",
+			       le64_to_cpu(por_event->power_on_ml_seconds));
+		obj_add_uint64(valid_attrs, "ctrl_time_stamp",
+			       le64_to_cpu(por_event->ctrl_time_stamp));
+	}
+}
+
+static void json_pel_nss_hw_error(void *pevent_log_info, __u32 offset,
+				  struct json_object *valid_attrs)
+{
+	struct nvme_nss_hw_err_event *nss_hw_err_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "nss_hw_err_code",
+		     le16_to_cpu(nss_hw_err_event->nss_hw_err_event_code));
+}
+
+static void json_pel_change_ns(void *pevent_log_info, __u32 offset, struct json_object *valid_attrs)
+{
+	struct nvme_change_ns_event *ns_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "nsmgt_cdw10", le32_to_cpu(ns_event->nsmgt_cdw10));
+	obj_add_uint64(valid_attrs, "nsze", le64_to_cpu(ns_event->nsze));
+	obj_add_uint64(valid_attrs, "nscap", le64_to_cpu(ns_event->nscap));
+	obj_add_uint(valid_attrs, "flbas", ns_event->flbas);
+	obj_add_uint(valid_attrs, "dps", ns_event->dps);
+	obj_add_uint(valid_attrs, "nmic", ns_event->nmic);
+	obj_add_uint(valid_attrs, "ana_grp_id", le32_to_cpu(ns_event->ana_grp_id));
+	obj_add_uint(valid_attrs, "nvmset_id", le16_to_cpu(ns_event->nvmset_id));
+	obj_add_uint(valid_attrs, "nsid", le32_to_cpu(ns_event->nsid));
+}
+
+static void json_pel_format_start(void *pevent_log_info, __u32 offset,
+				  struct json_object *valid_attrs)
+{
+	struct nvme_format_nvm_start_event *format_start_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "nsid", le32_to_cpu(format_start_event->nsid));
+	obj_add_uint(valid_attrs, "fna", format_start_event->fna);
+	obj_add_uint(valid_attrs, "format_nvm_cdw10",
+		     le32_to_cpu(format_start_event->format_nvm_cdw10));
+}
+
+static void json_pel_format_completion(void *pevent_log_info, __u32 offset,
+				       struct json_object *valid_attrs)
+{
+	struct nvme_format_nvm_compln_event *format_cmpln_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "nsid", le32_to_cpu(format_cmpln_event->nsid));
+	obj_add_uint(valid_attrs, "smallest_fpi", format_cmpln_event->smallest_fpi);
+	obj_add_uint(valid_attrs, "format_nvm_status", format_cmpln_event->format_nvm_status);
+	obj_add_uint(valid_attrs, "compln_info", le16_to_cpu(format_cmpln_event->compln_info));
+	obj_add_uint(valid_attrs, "status_field", le32_to_cpu(format_cmpln_event->status_field));
+}
+static void json_pel_sanitize_start(void *pevent_log_info, __u32 offset,
+				    struct json_object *valid_attrs)
+{
+	struct nvme_sanitize_start_event *sanitize_start_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "SANICAP", le32_to_cpu(sanitize_start_event->sani_cap));
+	obj_add_uint(valid_attrs, "sani_cdw10", le32_to_cpu(sanitize_start_event->sani_cdw10));
+	obj_add_uint(valid_attrs, "sani_cdw11", le32_to_cpu(sanitize_start_event->sani_cdw11));
+}
+
+static void json_pel_sanitize_completion(void *pevent_log_info, __u32 offset,
+					 struct json_object *valid_attrs)
+{
+	struct nvme_sanitize_compln_event *sanitize_cmpln_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "sani_prog", le16_to_cpu(sanitize_cmpln_event->sani_prog));
+	obj_add_uint(valid_attrs, "sani_status", le16_to_cpu(sanitize_cmpln_event->sani_status));
+	obj_add_uint(valid_attrs, "cmpln_info", le16_to_cpu(sanitize_cmpln_event->cmpln_info));
+}
+
+static void json_pel_thermal_excursion(void *pevent_log_info, __u32 offset,
+				       struct json_object *valid_attrs)
+{
+	struct nvme_thermal_exc_event *thermal_exc_event = pevent_log_info + offset;
+
+	obj_add_uint(valid_attrs, "over_temp", thermal_exc_event->over_temp);
+	obj_add_uint(valid_attrs, "threshold", thermal_exc_event->threshold);
+}
+
+static void json_pevent_entry(void *pevent_log_info, __u8 action, __u32 size, const char *devname,
+			      __u32 offset, struct json_object *valid)
+{
+	int i;
+	struct nvme_persistent_event_log *pevent_log_head = pevent_log_info;
+	struct nvme_persistent_event_entry *pevent_entry_head;
+	struct json_object *valid_attrs;
+
+	for (i = 0; i < le32_to_cpu(pevent_log_head->tnev); i++) {
+		if (offset + sizeof(*pevent_entry_head) >= size)
+			break;
+
+		pevent_entry_head = pevent_log_info + offset;
+
+		if (offset + pevent_entry_head->ehl + 3 + le16_to_cpu(pevent_entry_head->el) >=
+		    size)
+			break;
+
+		valid_attrs = json_create_object();
+
+		obj_add_uint(valid_attrs, "event_number", i);
+		obj_add_str(valid_attrs, "event_type",
+			    nvme_pel_event_to_string(pevent_entry_head->etype));
+		obj_add_uint(valid_attrs, "event_type_rev", pevent_entry_head->etype_rev);
+		obj_add_uint(valid_attrs, "event_header_len", pevent_entry_head->ehl);
+		obj_add_uint(valid_attrs, "event_header_additional_info", pevent_entry_head->ehai);
+		obj_add_uint(valid_attrs, "ctrl_id", le16_to_cpu(pevent_entry_head->cntlid));
+		obj_add_uint64(valid_attrs, "event_time_stamp",
+			       le64_to_cpu(pevent_entry_head->ets));
+		obj_add_uint(valid_attrs, "port_id", le16_to_cpu(pevent_entry_head->pelpid));
+		obj_add_uint(valid_attrs, "vu_info_len", le16_to_cpu(pevent_entry_head->vsil));
+		obj_add_uint(valid_attrs, "event_len", le16_to_cpu(pevent_entry_head->el));
+
+		offset += pevent_entry_head->ehl + 3;
+
+		switch (pevent_entry_head->etype) {
+		case NVME_PEL_SMART_HEALTH_EVENT:
+			json_pel_smart_health(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_FW_COMMIT_EVENT:
+			json_pel_fw_commit(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_TIMESTAMP_EVENT:
+			json_pel_timestamp(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_POWER_ON_RESET_EVENT:
+			json_pel_power_on_reset(pevent_log_info, offset, valid_attrs,
+						pevent_entry_head->el, pevent_entry_head->vsil);
+			break;
+		case NVME_PEL_NSS_HW_ERROR_EVENT:
+			json_pel_nss_hw_error(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_CHANGE_NS_EVENT:
+			json_pel_change_ns(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_FORMAT_START_EVENT:
+			json_pel_format_start(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_FORMAT_COMPLETION_EVENT:
+			json_pel_format_completion(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_SANITIZE_START_EVENT:
+			json_pel_sanitize_start(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_SANITIZE_COMPLETION_EVENT:
+			json_pel_sanitize_completion(pevent_log_info, offset, valid_attrs);
+			break;
+		case NVME_PEL_THERMAL_EXCURSION_EVENT:
+			json_pel_thermal_excursion(pevent_log_info, offset, valid_attrs);
+			break;
+		default:
+			break;
+		}
+
+		array_add_obj(valid, valid_attrs);
+		offset += le16_to_cpu(pevent_entry_head->el);
+	}
+}
+
+static void json_persistent_event_log(void *pevent_log_info, __u8 action,
+				      __u32 size, const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid = json_create_array();
+	__u32 offset = sizeof(struct nvme_persistent_event_log);
+
+	if (size >= offset) {
+		json_pevent_log_head(pevent_log_info, r);
+		json_pevent_entry(pevent_log_info, action, size, devname, offset, valid);
+		obj_add_array(r, "list_of_event_entries", valid);
+	} else {
+		obj_add_result(r, "No log data can be shown with this log len at least " \
+				"512 bytes is required or can be 0 to read the complete "\
+				"log page after context established");
+	}
+
+	json_print(r);
+}
+
+static void json_endurance_group_event_agg_log(
+		struct nvme_aggregate_predictable_lat_event *endurance_log,
+		__u64 log_entries, __u32 size, const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid_attrs;
+	struct json_object *valid = json_create_array();
+
+	obj_add_uint64(r, "num_entries_avail", le64_to_cpu(endurance_log->num_entries));
+
+	for (int i = 0; i < log_entries; i++) {
+		valid_attrs = json_create_object();
+		obj_add_uint(valid_attrs, "entry", le16_to_cpu(endurance_log->entries[i]));
+		array_add_obj(valid, valid_attrs);
+	}
+
+	obj_add_array(r, "list_of_entries", valid);
+
+	json_print(r);
+}
+
+static void json_lba_status(struct nvme_lba_status *list,
+			      unsigned long len)
+{
+	struct json_object *r = json_create_object();
+	int idx;
+	struct nvme_lba_status_desc *e;
+	struct json_object *lsde;
+	char json_str[STR_LEN];
+
+	obj_add_uint(r, "Number of LBA Status Descriptors (NLSD)", le32_to_cpu(list->nlsd));
+	obj_add_uint(r, "Completion Condition (CMPC)", list->cmpc);
+
+	switch (list->cmpc) {
+	case 1:
+		obj_add_str(r, "cmpc-definition",
+		    "Completed due to transferring the amount of data specified in the MNDW field");
+		break;
+	case 2:
+		obj_add_str(r, "cmpc-definition",
+		    "Completed due to having performed the action specified in the Action Type field over the number of logical blocks specified in the Range Length field");
+		break;
+	default:
+		break;
+	}
+
+	for (idx = 0; idx < list->nlsd; idx++) {
+		lsde = json_create_array();
+		sprintf(json_str, "LSD entry %d", idx);
+		obj_add_array(r, json_str, lsde);
+		e = &list->descs[idx];
+		sprintf(json_str, "0x%016"PRIu64"", le64_to_cpu(e->dslba));
+		obj_add_str(lsde, "DSLBA", json_str);
+		sprintf(json_str, "0x%08x", le32_to_cpu(e->nlb));
+		obj_add_str(lsde, "NLB", json_str);
+		sprintf(json_str, "0x%02x", e->status);
+		obj_add_str(lsde, "status", json_str);
+	}
+
+	json_print(r);
+}
+
+static void json_lba_status_log(void *lba_status, __u32 size, const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *desc;
+	struct json_object *element;
+	struct json_object *desc_list;
+	struct json_object *elements_list = json_create_array();
+	struct nvme_lba_status_log *hdr = lba_status;
+	struct nvme_lbas_ns_element *ns_element;
+	struct nvme_lba_rd *range_desc;
+	int offset = sizeof(*hdr);
+	__u32 num_lba_desc;
+	__u32 num_elements = le32_to_cpu(hdr->nlslne);
+	int ele;
+	int i;
+
+	obj_add_uint(r, "lslplen", le32_to_cpu(hdr->lslplen));
+	obj_add_uint(r, "nlslne", num_elements);
+	obj_add_uint(r, "estulb", le32_to_cpu(hdr->estulb));
+	obj_add_uint(r, "lsgc", le16_to_cpu(hdr->lsgc));
+
+	for (ele = 0; ele < num_elements; ele++) {
+		ns_element = lba_status + offset;
+		element = json_create_object();
+		obj_add_uint(element, "neid", le32_to_cpu(ns_element->neid));
+		num_lba_desc = le32_to_cpu(ns_element->nlrd);
+		obj_add_uint(element, "nlrd", num_lba_desc);
+		obj_add_uint(element, "ratype", ns_element->ratype);
+
+		offset += sizeof(*ns_element);
+		desc_list = json_create_array();
+
+		if (num_lba_desc != 0xffffffff) {
+			for (i = 0; i < num_lba_desc; i++) {
+				range_desc = lba_status + offset;
+				desc = json_create_object();
+				obj_add_uint64(desc, "rslba", le64_to_cpu(range_desc->rslba));
+				obj_add_uint(desc, "rnlb", le32_to_cpu(range_desc->rnlb));
+
+				offset += sizeof(*range_desc);
+				array_add_obj(desc_list, desc);
+			}
+		} else {
+			obj_add_result(r, "Number of LBA Range Descriptors (NLRD) set to %#x for NS element %d",
+					num_lba_desc, ele);
+		}
+
+		obj_add_array(element, "descs", desc_list);
+		array_add_obj(elements_list, element);
+	}
+
+	obj_add_array(r, "ns_elements", elements_list);
+
+	json_print(r);
+}
+
+static void json_resv_notif_log(struct nvme_resv_notification_log *resv,
+				const char *devname)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint64(r, "count", le64_to_cpu(resv->lpc));
+	obj_add_uint(r, "rn_log_type", resv->rnlpt);
+	obj_add_uint(r, "num_logs", resv->nalp);
+	obj_add_uint(r, "NSID", le32_to_cpu(resv->nsid));
+
+	json_print(r);
+}
+
+static void json_fid_support_effects_log(
+		struct nvme_fid_supported_effects_log *fid_log,
+		const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *fids;
+	struct json_object *fids_list = json_create_array();
+	unsigned int fid;
+	char key[128];
+	__u32 fid_support;
+
+	for (fid = 0; fid < NVME_LOG_FID_SUPPORTED_EFFECTS_MAX; fid++) {
+		fid_support = le32_to_cpu(fid_log->fid_support[fid]);
+		if (fid_support & NVME_FID_SUPPORTED_EFFECTS_FSUPP) {
+			fids = json_create_object();
+			sprintf(key, "fid_%u", fid);
+			obj_add_uint(fids, key, fid_support);
+			array_add_obj(fids_list, fids);
+		}
+	}
+
+	obj_add_obj(r, "fid_support", fids_list);
+
+	json_print(r);
+}
+
+static void json_mi_cmd_support_effects_log(
+		struct nvme_mi_cmd_supported_effects_log *mi_cmd_log,
+		const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *mi_cmds;
+	struct json_object *mi_cmds_list = json_create_array();
+	unsigned int mi_cmd;
+	char key[128];
+	__u32 mi_cmd_support;
+
+	for (mi_cmd = 0; mi_cmd < NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX; mi_cmd++) {
+		mi_cmd_support = le32_to_cpu(mi_cmd_log->mi_cmd_support[mi_cmd]);
+		if (mi_cmd_support & NVME_MI_CMD_SUPPORTED_EFFECTS_CSUPP) {
+			mi_cmds = json_create_object();
+			sprintf(key, "mi_cmd_%u", mi_cmd);
+			obj_add_uint(mi_cmds, key, mi_cmd_support);
+			array_add_obj(mi_cmds_list, mi_cmds);
+		}
+	}
+
+	obj_add_obj(r, "mi_command_support", mi_cmds_list);
+
+	json_print(r);
+}
+
+static void json_boot_part_log(void *bp_log, const char *devname,
+			       __u32 size)
+{
+	struct nvme_boot_partition *hdr = bp_log;
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "count", hdr->lid);
+	obj_add_uint(r, "abpid", (le32_to_cpu(hdr->bpinfo) >> 31) & 0x1);
+	obj_add_uint(r, "bpsz", le32_to_cpu(hdr->bpinfo) & 0x7fff);
+
+	json_print(r);
+}
+
+/* Printable Eye string is allocated and returned, caller must free */
+static char *json_eom_printable_eye(struct nvme_eom_lane_desc *lane,
+				    struct json_object *r)
+{
+	char *eye = (char *)lane->eye_desc;
+	char *printable = malloc(lane->nrows * lane->ncols + lane->ncols);
+	char *printable_start = printable;
+	int i, j;
+
+	if (!printable)
+		goto exit;
+
+	for (i = 0; i < lane->nrows; i++) {
+		for (j = 0; j < lane->ncols; j++, printable++)
+			sprintf(printable, "%c", eye[i * lane->ncols + j]);
+		sprintf(printable++, "\n");
+	}
+
+	obj_add_str(r, "printable_eye", printable_start);
+
+exit:
+	return printable_start;
+}
+
+static void json_phy_rx_eom_descs(struct nvme_phy_rx_eom_log *log,
+			struct json_object *r, char **allocated_eyes)
+{
+	void *p = log->descs;
+	uint16_t num_descs = le16_to_cpu(log->nd);
+	int i;
+	struct json_object *descs = json_create_array();
+
+	obj_add_array(r, "descs", descs);
+
+	for (i = 0; i < num_descs; i++) {
+		struct nvme_eom_lane_desc *desc = p;
+		struct json_object *jdesc = json_create_object();
+
+		obj_add_uint(jdesc, "lid", desc->mstatus);
+		obj_add_uint(jdesc, "lane", desc->lane);
+		obj_add_uint(jdesc, "eye", desc->eye);
+		obj_add_uint(jdesc, "top", le16_to_cpu(desc->top));
+		obj_add_uint(jdesc, "bottom", le16_to_cpu(desc->bottom));
+		obj_add_uint(jdesc, "left", le16_to_cpu(desc->left));
+		obj_add_uint(jdesc, "right", le16_to_cpu(desc->right));
+		obj_add_uint(jdesc, "nrows", le16_to_cpu(desc->nrows));
+		obj_add_uint(jdesc, "ncols", le16_to_cpu(desc->ncols));
+		obj_add_uint(jdesc, "edlen", le16_to_cpu(desc->edlen));
+
+		if (log->odp & NVME_EOM_PRINTABLE_EYE_PRESENT)
+			allocated_eyes[i] = json_eom_printable_eye(desc, r);
+
+		/* Eye Data field is vendor specific, doesn't map to JSON */
+
+		array_add_obj(descs, jdesc);
+
+		p += log->dsize;
+	}
+}
+
+static void json_phy_rx_eom_log(struct nvme_phy_rx_eom_log *log, __u16 controller)
+{
+	char **allocated_eyes = NULL;
+	int i;
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "lid", log->lid);
+	obj_add_uint(r, "eomip", log->eomip);
+	obj_add_uint(r, "hsize", le16_to_cpu(log->hsize));
+	obj_add_uint(r, "rsize", le32_to_cpu(log->rsize));
+	obj_add_uint(r, "eomdgn", log->eomdgn);
+	obj_add_uint(r, "lr", log->lr);
+	obj_add_uint(r, "lanes", log->lanes);
+	obj_add_uint(r, "epl", log->epl);
+	obj_add_uint(r, "lspfc", log->lspfc);
+	obj_add_uint(r, "li", log->li);
+	obj_add_uint(r, "lsic", le16_to_cpu(log->lsic));
+	obj_add_uint(r, "dsize", le32_to_cpu(log->dsize));
+	obj_add_uint(r, "nd", le16_to_cpu(log->nd));
+	obj_add_uint(r, "maxtb", le16_to_cpu(log->maxtb));
+	obj_add_uint(r, "maxlr", le16_to_cpu(log->maxlr));
+	obj_add_uint(r, "etgood", le16_to_cpu(log->etgood));
+	obj_add_uint(r, "etbetter", le16_to_cpu(log->etbetter));
+	obj_add_uint(r, "etbest", le16_to_cpu(log->etbest));
+
+	if (log->eomip == NVME_PHY_RX_EOM_COMPLETED) {
+		/* Save Printable Eye strings allocated to free later */
+		allocated_eyes = malloc(log->nd * sizeof(char *));
+		if (allocated_eyes)
+			json_phy_rx_eom_descs(log, r, allocated_eyes);
+	}
+
+	if (allocated_eyes) {
+		for (i = 0; i < log->nd; i++) {
+			/* Free any Printable Eye strings allocated */
+			if (allocated_eyes[i])
+				free(allocated_eyes[i]);
+		}
+		free(allocated_eyes);
+	}
+
+	json_print(r);
+}
+
+static void json_media_unit_stat_log(struct nvme_media_unit_stat_log *mus)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *entries = json_create_array();
+	struct json_object *entry;
+	int i;
+
+	obj_add_uint(r, "nmu", le16_to_cpu(mus->nmu));
+	obj_add_uint(r, "cchans", le16_to_cpu(mus->cchans));
+	obj_add_uint(r, "sel_config", le16_to_cpu(mus->sel_config));
+
+	for (i = 0; i < mus->nmu; i++) {
+		entry = json_create_object();
+		obj_add_uint(entry, "muid", le16_to_cpu(mus->mus_desc[i].muid));
+		obj_add_uint(entry, "domainid", le16_to_cpu(mus->mus_desc[i].domainid));
+		obj_add_uint(entry, "endgid", le16_to_cpu(mus->mus_desc[i].endgid));
+		obj_add_uint(entry, "nvmsetid", le16_to_cpu(mus->mus_desc[i].nvmsetid));
+		obj_add_uint(entry, "cap_adj_fctr", le16_to_cpu(mus->mus_desc[i].cap_adj_fctr));
+		obj_add_uint(entry, "avl_spare", mus->mus_desc[i].avl_spare);
+		obj_add_uint(entry, "percent_used", mus->mus_desc[i].percent_used);
+		obj_add_uint(entry, "mucs", mus->mus_desc[i].mucs);
+		obj_add_uint(entry, "cio", mus->mus_desc[i].cio);
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "mus_list", entries);
+
+	json_print(r);
+}
+
+static void json_supported_cap_config_log(
+		struct nvme_supported_cap_config_list_log *cap_log)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *cap_list = json_create_array();
+	struct json_object *capacity;
+	struct json_object *end_list;
+	struct json_object *set_list;
+	struct json_object *set;
+	struct json_object *chan_list;
+	struct json_object *channel;
+	struct json_object *media_list;
+	struct json_object *media;
+	struct json_object *endurance;
+	struct nvme_end_grp_chan_desc *chan_desc;
+	int i, j, k, l, m, egcn, egsets, egchans, chmus;
+	int sccn = cap_log->sccn;
+
+	obj_add_uint(r, "sccn", cap_log->sccn);
+	for (i = 0; i < sccn; i++) {
+		capacity = json_create_object();
+		obj_add_uint(capacity, "cap_config_id",
+			     le16_to_cpu(cap_log->cap_config_desc[i].cap_config_id));
+		obj_add_uint(capacity, "domainid",
+			     le16_to_cpu(cap_log->cap_config_desc[i].domainid));
+		obj_add_uint(capacity, "egcn", le16_to_cpu(cap_log->cap_config_desc[i].egcn));
+		end_list = json_create_array();
+		egcn = le16_to_cpu(cap_log->cap_config_desc[i].egcn);
+		for (j = 0; j < egcn; j++) {
+			endurance = json_create_object();
+			obj_add_uint(endurance, "endgid",
+				     le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].endgid));
+			obj_add_uint(endurance, "cap_adj_factor",
+				     le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].cap_adj_factor));
+			obj_add_uint128(endurance, "tegcap",
+					le128_to_cpu(cap_log->cap_config_desc[i].egcd[j].tegcap));
+			obj_add_uint128(endurance, "segcap",
+					le128_to_cpu(cap_log->cap_config_desc[i].egcd[j].segcap));
+			obj_add_uint(endurance, "egsets",
+				     le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].egsets));
+			egsets = le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].egsets);
+			set_list = json_create_array();
+			for (k = 0; k < egsets; k++) {
+				set = json_create_object();
+				obj_add_uint(set, "nvmsetid",
+				    le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].nvmsetid[k]));
+				array_add_obj(set_list, set);
+			}
+			chan_desc = (struct nvme_end_grp_chan_desc *)
+			    (cap_log->cap_config_desc[i].egcd[j].nvmsetid[0] * sizeof(__u16) * egsets);
+			egchans = le16_to_cpu(chan_desc->egchans);
+			obj_add_uint(endurance, "egchans", le16_to_cpu(chan_desc->egchans));
+			chan_list = json_create_array();
+			for (l = 0; l < egchans; l++) {
+				channel = json_create_object();
+				obj_add_uint(channel, "chanid",
+					     le16_to_cpu(chan_desc->chan_config_desc[l].chanid));
+				obj_add_uint(channel, "chmus",
+					     le16_to_cpu(chan_desc->chan_config_desc[l].chmus));
+				chmus = le16_to_cpu(chan_desc->chan_config_desc[l].chmus);
+				media_list = json_create_array();
+				for (m = 0; m < chmus; m++) {
+					media = json_create_object();
+					obj_add_uint(media, "chanid",
+					    le16_to_cpu(chan_desc->chan_config_desc[l].mu_config_desc[m].muid));
+					obj_add_uint(media, "chmus",
+					    le16_to_cpu(chan_desc->chan_config_desc[l].mu_config_desc[m].mudl));
+					array_add_obj(media_list, media);
+				}
+				obj_add_array(channel, "Media Descriptor", media_list);
+				array_add_obj(chan_list, channel);
+			}
+			obj_add_array(endurance, "Channel Descriptor", chan_list);
+			obj_add_array(endurance, "NVM Set IDs", set_list);
+			array_add_obj(end_list, endurance);
+		}
+		obj_add_array(capacity, "Endurance Descriptor", end_list);
+		array_add_obj(cap_list, capacity);
+	}
+
+	obj_add_array(r, "Capacity Descriptor", cap_list);
+
+	json_print(r);
+}
+
+static void json_nvme_fdp_configs(struct nvme_fdp_config_log *log, size_t len)
+{
+	struct json_object *r, *obj_configs;
+	uint16_t n;
+
+	void *p = log->configs;
+
+	r = json_create_object();
+	obj_configs = json_create_array();
+
+	n = le16_to_cpu(log->n);
+
+	obj_add_uint(r, "n", n);
+
+	for (int i = 0; i < n + 1; i++) {
+		struct nvme_fdp_config_desc *config = p;
+
+		struct json_object *obj_config = json_create_object();
+		struct json_object *obj_ruhs = json_create_array();
+
+		obj_add_uint(obj_config, "fdpa", config->fdpa);
+		obj_add_uint(obj_config, "vss", config->vss);
+		obj_add_uint(obj_config, "nrg", le32_to_cpu(config->nrg));
+		obj_add_uint(obj_config, "nruh", le16_to_cpu(config->nruh));
+		obj_add_uint(obj_config, "nnss", le32_to_cpu(config->nnss));
+		obj_add_uint64(obj_config, "runs", le64_to_cpu(config->runs));
+		obj_add_uint(obj_config, "erutl", le32_to_cpu(config->erutl));
+
+		for (int j = 0; j < le16_to_cpu(config->nruh); j++) {
+			struct nvme_fdp_ruh_desc *ruh = &config->ruhs[j];
+
+			struct json_object *obj_ruh = json_create_object();
+
+			obj_add_uint(obj_ruh, "ruht", ruh->ruht);
+
+			array_add_obj(obj_ruhs, obj_ruh);
+		}
+
+		array_add_obj(obj_configs, obj_config);
+
+		p += config->size;
+	}
+
+	obj_add_array(r, "configs", obj_configs);
+
+	json_print(r);
+}
+
+static void json_nvme_fdp_usage(struct nvme_fdp_ruhu_log *log, size_t len)
+{
+	struct json_object *r, *obj_ruhus;
+	uint16_t nruh;
+
+	r = json_create_object();
+	obj_ruhus = json_create_array();
+
+	nruh = le16_to_cpu(log->nruh);
+
+	obj_add_uint(r, "nruh", nruh);
+
+	for (int i = 0; i < nruh; i++) {
+		struct nvme_fdp_ruhu_desc *ruhu = &log->ruhus[i];
+
+		struct json_object *obj_ruhu = json_create_object();
+
+		obj_add_uint(obj_ruhu, "ruha", ruhu->ruha);
+
+		array_add_obj(obj_ruhus, obj_ruhu);
+	}
+
+	obj_add_array(r, "ruhus", obj_ruhus);
+
+	json_print(r);
+}
+
+static void json_nvme_fdp_stats(struct nvme_fdp_stats_log *log)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint128(r, "hbmw", le128_to_cpu(log->hbmw));
+	obj_add_uint128(r, "mbmw", le128_to_cpu(log->mbmw));
+	obj_add_uint128(r, "mbe", le128_to_cpu(log->mbe));
+
+	json_print(r);
+}
+
+static void json_nvme_fdp_events(struct nvme_fdp_events_log *log)
+{
+	struct json_object *r, *obj_events;
+	uint32_t n;
+
+	r = json_create_object();
+	obj_events = json_create_array();
+
+	n = le32_to_cpu(log->n);
+
+	obj_add_uint(r, "n", n);
+
+	for (unsigned int i = 0; i < n; i++) {
+		struct nvme_fdp_event *event = &log->events[i];
+
+		struct json_object *obj_event = json_create_object();
+
+		obj_add_uint(obj_event, "type", event->type);
+		obj_add_uint(obj_event, "fdpef", event->flags);
+		obj_add_uint(obj_event, "pid", le16_to_cpu(event->pid));
+		obj_add_uint64(obj_event, "timestamp", le64_to_cpu(*(uint64_t *)&event->ts));
+		obj_add_uint(obj_event, "nsid", le32_to_cpu(event->nsid));
+
+		if (event->type == NVME_FDP_EVENT_REALLOC) {
+			struct nvme_fdp_event_realloc *mr;
+			mr = (struct nvme_fdp_event_realloc *)&event->type_specific;
+
+			obj_add_uint(obj_event, "nlbam", le16_to_cpu(mr->nlbam));
+
+			if (mr->flags & NVME_FDP_EVENT_REALLOC_F_LBAV)
+				obj_add_uint64(obj_event, "lba", le64_to_cpu(mr->lba));
+		}
+
+		array_add_obj(obj_events, obj_event);
+	}
+
+	obj_add_array(r, "events", obj_events);
+
+	json_print(r);
+}
+
+static void json_nvme_fdp_ruh_status(struct nvme_fdp_ruh_status *status, size_t len)
+{
+	struct json_object *r, *obj_ruhss;
+	uint16_t nruhsd;
+
+	r = json_create_object();
+	obj_ruhss = json_create_array();
+
+	nruhsd = le16_to_cpu(status->nruhsd);
+
+	obj_add_uint(r, "nruhsd", nruhsd);
+
+	for (unsigned int i = 0; i < nruhsd; i++) {
+		struct nvme_fdp_ruh_status_desc *ruhs = &status->ruhss[i];
+
+		struct json_object *obj_ruhs = json_create_object();
+
+		obj_add_uint(obj_ruhs, "pid", le16_to_cpu(ruhs->pid));
+		obj_add_uint(obj_ruhs, "ruhid", le16_to_cpu(ruhs->ruhid));
+		obj_add_uint(obj_ruhs, "earutr", le32_to_cpu(ruhs->earutr));
+		obj_add_uint64(obj_ruhs, "ruamw", le64_to_cpu(ruhs->ruamw));
+
+		array_add_obj(obj_ruhss, obj_ruhs);
+	}
+
+	obj_add_array(r, "ruhss", obj_ruhss);
+
+	json_print(r);
+}
+
+static unsigned int json_print_nvme_subsystem_multipath(nvme_subsystem_t s, json_object *paths)
+{
+	nvme_ns_t n;
+	nvme_path_t p;
+	unsigned int i = 0;
+
+	n = nvme_subsystem_first_ns(s);
+	if (!n)
+		return 0;
+
+	nvme_namespace_for_each_path(n, p) {
+		struct json_object *path_attrs;
+		nvme_ctrl_t c = nvme_path_get_ctrl(p);
+
+		path_attrs = json_create_object();
+		obj_add_str(path_attrs, "Name", nvme_ctrl_get_name(c));
+		obj_add_str(path_attrs, "Transport", nvme_ctrl_get_transport(c));
+		obj_add_str(path_attrs, "Address", nvme_ctrl_get_address(c));
+		obj_add_str(path_attrs, "State", nvme_ctrl_get_state(c));
+		obj_add_str(path_attrs, "ANAState", nvme_path_get_ana_state(p));
+		array_add_obj(paths, path_attrs);
+		i++;
+	}
+
+	return i;
+}
+
+static void json_print_nvme_subsystem_ctrls(nvme_subsystem_t s,
+					    json_object *paths)
+{
+	nvme_ctrl_t c;
+
+	nvme_subsystem_for_each_ctrl(s, c) {
+		struct json_object *path_attrs;
+
+		path_attrs = json_create_object();
+		obj_add_str(path_attrs, "Name", nvme_ctrl_get_name(c));
+		obj_add_str(path_attrs, "Transport", nvme_ctrl_get_transport(c));
+		obj_add_str(path_attrs, "Address", nvme_ctrl_get_address(c));
+		obj_add_str(path_attrs, "State", nvme_ctrl_get_state(c));
+		array_add_obj(paths, path_attrs);
+	}
+}
+
+static void json_print_nvme_subsystem_list(nvme_root_t r, bool show_ana)
+{
+	struct json_object *host_attrs, *subsystem_attrs;
+	struct json_object *subsystems, *paths;
+	struct json_object *a = json_create_array();
+	nvme_host_t h;
+
+	nvme_for_each_host(r, h) {
+		nvme_subsystem_t s;
+		const char *hostid;
+
+		host_attrs = json_create_object();
+		obj_add_str(host_attrs, "HostNQN", nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			obj_add_str(host_attrs, "HostID", hostid);
+		subsystems = json_create_array();
+		nvme_for_each_subsystem(h, s) {
+			subsystem_attrs = json_create_object();
+			obj_add_str(subsystem_attrs, "Name", nvme_subsystem_get_name(s));
+			obj_add_str(subsystem_attrs, "NQN", nvme_subsystem_get_nqn(s));
+			obj_add_str(subsystem_attrs, "IOPolicy", nvme_subsystem_get_iopolicy(s));
+
+			array_add_obj(subsystems, subsystem_attrs);
+			paths = json_create_array();
+
+			if (!show_ana || !json_print_nvme_subsystem_multipath(s, paths))
+				json_print_nvme_subsystem_ctrls(s, paths);
+
+			obj_add_array(subsystem_attrs, "Paths", paths);
+		}
+		obj_add_array(host_attrs, "Subsystems", subsystems);
+		array_add_obj(a, host_attrs);
+	}
+
+	json_print(a);
+}
+
+static void json_ctrl_registers_cap(void *bar, struct json_object *r)
+{
+	uint64_t cap = mmio_read64(bar + NVME_REG_CAP);
+
+	if (human())
+		json_registers_cap((struct nvme_bar_cap *)&cap, obj_create_array_obj(r, "cap"));
+	else
+		obj_add_uint64(r, "cap", cap);
+}
+
+static void json_ctrl_registers_vs(void *bar, struct json_object *r)
+{
+	uint32_t vs = mmio_read32(bar + NVME_REG_VS);
+
+	if (human())
+		json_registers_version(vs, obj_create_array_obj(r, "vs"));
+	else
+		obj_add_int(r, "vs", vs);
+}
+
+static void json_ctrl_registers_intms(void *bar, struct json_object *r)
+{
+	uint32_t intms = mmio_read32(bar + NVME_REG_INTMS);
+
+	if (human())
+		json_registers_intms(intms, obj_create_array_obj(r, "intms"));
+	else
+		obj_add_int(r, "intms", intms);
+}
+
+static void json_ctrl_registers_intmc(void *bar, struct json_object *r)
+{
+	uint32_t intmc = mmio_read32(bar + NVME_REG_INTMC);
+
+	if (human())
+		json_registers_intmc(intmc, obj_create_array_obj(r, "intmc"));
+	else
+		obj_add_int(r, "intmc", intmc);
+}
+
+static void json_ctrl_registers_cc(void *bar, struct json_object *r)
+{
+	uint32_t cc = mmio_read32(bar + NVME_REG_CC);
+
+	if (human())
+		json_registers_cc(cc, obj_create_array_obj(r, "cc"));
+	else
+		obj_add_int(r, "cc", cc);
+}
+
+static void json_ctrl_registers_csts(void *bar, struct json_object *r)
+{
+	uint32_t csts = mmio_read32(bar + NVME_REG_CSTS);
+
+	if (human())
+		json_registers_csts(csts, obj_create_array_obj(r, "csts"));
+	else
+		obj_add_int(r, "csts", csts);
+}
+
+static void json_ctrl_registers_nssr(void *bar, struct json_object *r)
+{
+	uint32_t nssr = mmio_read32(bar + NVME_REG_NSSR);
+
+	if (human())
+		json_registers_nssr(nssr, obj_create_array_obj(r, "nssr"));
+	else
+		obj_add_int(r, "nssr", nssr);
+}
+
+static void json_ctrl_registers_crto(void *bar, struct json_object *r)
+{
+	uint32_t crto = mmio_read32(bar + NVME_REG_CRTO);
+
+	if (human())
+		json_registers_crto(crto, obj_create_array_obj(r, "crto"));
+	else
+		obj_add_int(r, "crto", crto);
+}
+
+static void json_ctrl_registers_aqa(void *bar, struct json_object *r)
+{
+	uint32_t aqa = mmio_read32(bar + NVME_REG_AQA);
+
+	if (human())
+		json_registers_aqa(aqa, obj_create_array_obj(r, "aqa"));
+	else
+		obj_add_int(r, "aqa", aqa);
+}
+
+static void json_ctrl_registers_asq(void *bar, struct json_object *r)
+{
+	uint64_t asq = mmio_read64(bar + NVME_REG_ASQ);
+
+	if (human())
+		json_registers_asq(asq, obj_create_array_obj(r, "asq"));
+	else
+		obj_add_uint64(r, "asq", asq);
+}
+
+static void json_ctrl_registers_acq(void *bar, struct json_object *r)
+{
+	uint64_t acq = mmio_read64(bar + NVME_REG_ACQ);
+
+	if (human())
+		json_registers_acq(acq, obj_create_array_obj(r, "acq"));
+	else
+		obj_add_uint64(r, "acq", acq);
+}
+
+static void json_ctrl_registers_cmbloc(void *bar, struct json_object *r)
+{
+	uint32_t cmbloc = mmio_read32(bar + NVME_REG_CMBLOC);
+
+	if (human())
+		json_registers_cmbloc(cmbloc, bar, obj_create_array_obj(r, "cmbloc"));
+	else
+		obj_add_int(r, "cmbloc", cmbloc);
+}
+
+static void json_ctrl_registers_cmbsz(void *bar, struct json_object *r)
+{
+	uint32_t cmbsz = mmio_read32(bar + NVME_REG_CMBSZ);
+
+	if (human())
+		json_registers_cmbsz(cmbsz, obj_create_array_obj(r, "cmbsz"));
+	else
+		obj_add_int(r, "cmbsz", cmbsz);
+}
+
+static void json_ctrl_registers_bpinfo(void *bar, struct json_object *r)
+{
+	uint32_t bpinfo = mmio_read32(bar + NVME_REG_BPINFO);
+
+	if (human())
+		json_registers_bpinfo(bpinfo, obj_create_array_obj(r, "bpinfo"));
+	else
+		obj_add_int(r, "bpinfo", bpinfo);
+}
+
+static void json_ctrl_registers_bprsel(void *bar, struct json_object *r)
+{
+	uint32_t bprsel = mmio_read32(bar + NVME_REG_BPRSEL);
+
+	if (human())
+		json_registers_bprsel(bprsel, obj_create_array_obj(r, "bprsel"));
+	else
+		obj_add_int(r, "bprsel", bprsel);
+}
+
+static void json_ctrl_registers_bpmbl(void *bar, struct json_object *r)
+{
+	uint64_t bpmbl = mmio_read64(bar + NVME_REG_BPMBL);
+
+	if (human())
+		json_registers_bpmbl(bpmbl, obj_create_array_obj(r, "bpmbl"));
+	else
+		obj_add_uint64(r, "bpmbl", bpmbl);
+}
+
+static void json_ctrl_registers_cmbmsc(void *bar, struct json_object *r)
+{
+	uint64_t cmbmsc = mmio_read64(bar + NVME_REG_CMBMSC);
+
+	if (human())
+		json_registers_cmbmsc(cmbmsc, obj_create_array_obj(r, "cmbmsc"));
+	else
+		obj_add_uint64(r, "cmbmsc", cmbmsc);
+}
+
+static void json_ctrl_registers_cmbsts(void *bar, struct json_object *r)
+{
+	uint32_t cmbsts = mmio_read32(bar + NVME_REG_CMBSTS);
+
+	if (human())
+		json_registers_cmbsts(cmbsts, obj_create_array_obj(r, "cmbsts"));
+	else
+		obj_add_int(r, "cmbsts", cmbsts);
+}
+
+static void json_ctrl_registers_pmrcap(void *bar, struct json_object *r)
+{
+	uint32_t pmrcap = mmio_read32(bar + NVME_REG_PMRCAP);
+
+	if (human())
+		json_registers_pmrcap(pmrcap, obj_create_array_obj(r, "pmrcap"));
+	else
+		obj_add_int(r, "pmrcap", pmrcap);
+}
+
+static void json_ctrl_registers_pmrctl(void *bar, struct json_object *r)
+{
+	uint32_t pmrctl = mmio_read32(bar + NVME_REG_PMRCTL);
+
+	if (human())
+		json_registers_pmrctl(pmrctl, obj_create_array_obj(r, "pmrctl"));
+	else
+		obj_add_int(r, "pmrctl", pmrctl);
+}
+
+static void json_ctrl_registers_pmrsts(void *bar, struct json_object *r)
+{
+	uint32_t pmrsts = mmio_read32(bar + NVME_REG_PMRSTS);
+
+	if (human())
+		json_registers_pmrsts(pmrsts, bar, obj_create_array_obj(r, "pmrsts"));
+	else
+		obj_add_int(r, "pmrsts", pmrsts);
+}
+
+static void json_ctrl_registers_pmrebs(void *bar, struct json_object *r)
+{
+	uint32_t pmrebs = mmio_read32(bar + NVME_REG_PMREBS);
+
+	if (human())
+		json_registers_pmrebs(pmrebs, obj_create_array_obj(r, "pmrebs"));
+	else
+		obj_add_int(r, "pmrebs", pmrebs);
+}
+
+static void json_ctrl_registers_pmrswtp(void *bar, struct json_object *r)
+{
+	uint32_t pmrswtp = mmio_read32(bar + NVME_REG_PMRSWTP);
+
+	if (human())
+		json_registers_pmrswtp(pmrswtp, obj_create_array_obj(r, "pmrswtp"));
+	else
+		obj_add_int(r, "pmrswtp", pmrswtp);
+}
+
+static void json_ctrl_registers_pmrmscl(void *bar, struct json_object *r)
+{
+	uint32_t pmrmscl = mmio_read32(bar + NVME_REG_PMRMSCL);
+
+	if (human())
+		json_registers_pmrmscl(pmrmscl, obj_create_array_obj(r, "pmrmscl"));
+	else
+		obj_add_uint(r, "pmrmscl", pmrmscl);
+}
+
+static void json_ctrl_registers_pmrmscu(void *bar, struct json_object *r)
+{
+	uint32_t pmrmscu = mmio_read32(bar + NVME_REG_PMRMSCU);
+
+	if (human())
+		json_registers_pmrmscu(pmrmscu, obj_create_array_obj(r, "pmrmscu"));
+	else
+		obj_add_uint(r, "pmrmscu", pmrmscu);
+}
+
+static void json_ctrl_registers(void *bar, bool fabrics)
+{
+	struct json_object *r = json_create_object();
+
+	json_ctrl_registers_cap(bar, r);
+	json_ctrl_registers_vs(bar, r);
+	json_ctrl_registers_intms(bar, r);
+	json_ctrl_registers_intmc(bar, r);
+	json_ctrl_registers_cc(bar, r);
+	json_ctrl_registers_csts(bar, r);
+	json_ctrl_registers_nssr(bar, r);
+	json_ctrl_registers_crto(bar, r);
+	json_ctrl_registers_aqa(bar, r);
+	json_ctrl_registers_asq(bar, r);
+	json_ctrl_registers_acq(bar, r);
+	json_ctrl_registers_cmbloc(bar, r);
+	json_ctrl_registers_cmbsz(bar, r);
+	json_ctrl_registers_bpinfo(bar, r);
+	json_ctrl_registers_bprsel(bar, r);
+	json_ctrl_registers_bpmbl(bar, r);
+	json_ctrl_registers_cmbmsc(bar, r);
+	json_ctrl_registers_cmbsts(bar, r);
+	json_ctrl_registers_pmrcap(bar, r);
+	json_ctrl_registers_pmrctl(bar, r);
+	json_ctrl_registers_pmrsts(bar, r);
+	json_ctrl_registers_pmrebs(bar, r);
+	json_ctrl_registers_pmrswtp(bar, r);
+	json_ctrl_registers_pmrmscl(bar, r);
+	json_ctrl_registers_pmrmscu(bar, r);
+
+	json_print(r);
+}
+
+static void json_nvme_cmd_set_independent_id_ns(struct nvme_id_independent_id_ns *ns,
+						unsigned int nsid)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_int(r, "nsfeat", ns->nsfeat);
+	obj_add_int(r, "nmic", ns->nmic);
+	obj_add_int(r, "rescap", ns->rescap);
+	obj_add_int(r, "fpi", ns->fpi);
+	obj_add_uint(r, "anagrpid", le32_to_cpu(ns->anagrpid));
+	obj_add_int(r, "nsattr", ns->nsattr);
+	obj_add_int(r, "nvmsetid", le16_to_cpu(ns->nvmsetid));
+	obj_add_int(r, "endgid", le16_to_cpu(ns->endgid));
+	obj_add_int(r, "nstat", ns->nstat);
+
+	json_print(r);
+}
+
+static void json_nvme_id_ns_descs(void *data, unsigned int nsid)
+{
+	/* large enough to hold uuid str (37) or nguid str (32) + zero byte */
+	char json_str[STR_LEN];
+	char *json_str_p;
+	union {
+		__u8 eui64[NVME_NIDT_EUI64_LEN];
+		__u8 nguid[NVME_NIDT_NGUID_LEN];
+		__u8 uuid[NVME_UUID_LEN];
+		__u8 csi;
+	} desc;
+	struct json_object *r = json_create_object();
+	struct json_object *json_array = NULL;
+	off_t off;
+	int pos, len = 0;
+	int i;
+
+	for (pos = 0; pos < NVME_IDENTIFY_DATA_SIZE; pos += len) {
+		struct nvme_ns_id_desc *cur = data + pos;
+		const char *nidt_name = NULL;
+
+		if (cur->nidl == 0)
+			break;
+
+		memset(json_str, 0, sizeof(json_str));
+		json_str_p = json_str;
+		off = pos + sizeof(*cur);
+
+		switch (cur->nidt) {
+		case NVME_NIDT_EUI64:
+			memcpy(desc.eui64, data + off, sizeof(desc.eui64));
+			for (i = 0; i < sizeof(desc.eui64); i++)
+				json_str_p += sprintf(json_str_p, "%02x", desc.eui64[i]);
+			len = sizeof(desc.eui64);
+			nidt_name = "eui64";
+			break;
+		case NVME_NIDT_NGUID:
+			memcpy(desc.nguid, data + off, sizeof(desc.nguid));
+			for (i = 0; i < sizeof(desc.nguid); i++)
+				json_str_p += sprintf(json_str_p, "%02x", desc.nguid[i]);
+			len = sizeof(desc.nguid);
+			nidt_name = "nguid";
+			break;
+		case NVME_NIDT_UUID:
+			memcpy(desc.uuid, data + off, sizeof(desc.uuid));
+			nvme_uuid_to_string(desc.uuid, json_str);
+			len = sizeof(desc.uuid);
+			nidt_name = "uuid";
+			break;
+		case NVME_NIDT_CSI:
+			memcpy(&desc.csi, data + off, sizeof(desc.csi));
+			sprintf(json_str_p, "%#x", desc.csi);
+			len += sizeof(desc.csi);
+			nidt_name = "csi";
+			break;
+		default:
+			/* Skip unknown types */
+			len = cur->nidl;
+			break;
+		}
+
+		if (nidt_name) {
+			struct json_object *elem = json_create_object();
+
+			obj_add_int(elem, "loc", pos);
+			obj_add_int(elem, "nidt", (int)cur->nidt);
+			obj_add_int(elem, "nidl", (int)cur->nidl);
+			obj_add_str(elem, "Type", nidt_name);
+			obj_add_str(elem, nidt_name, json_str);
+
+			if (!json_array)
+				json_array = json_create_array();
+			array_add_obj(json_array, elem);
+		}
+
+		len += sizeof(*cur);
+	}
+
+	if (json_array)
+		obj_add_array(r, "ns-descs", json_array);
+
+	json_print(r);
+}
+
+static void json_nvme_id_ctrl_nvm(struct nvme_id_ctrl_nvm *ctrl_nvm)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "vsl", ctrl_nvm->vsl);
+	obj_add_uint(r, "wzsl", ctrl_nvm->wzsl);
+	obj_add_uint(r, "wusl", ctrl_nvm->wusl);
+	obj_add_uint(r, "dmrl", ctrl_nvm->dmrl);
+	obj_add_uint(r, "dmrsl", le32_to_cpu(ctrl_nvm->dmrsl));
+	obj_add_uint64(r, "dmsl", le64_to_cpu(ctrl_nvm->dmsl));
+
+	json_print(r);
+}
+
+static void json_nvme_nvm_id_ns(struct nvme_nvm_id_ns *nvm_ns,
+				unsigned int nsid, struct nvme_id_ns *ns,
+				unsigned int lba_index, bool cap_only)
+
+{
+	struct json_object *r = json_create_object();
+	struct json_object *elbafs = json_create_array();
+	int i;
+
+	if (!cap_only)
+		obj_add_uint64(r, "lbstm", le64_to_cpu(nvm_ns->lbstm));
+
+	obj_add_int(r, "pic", nvm_ns->pic);
+
+	obj_add_array(r, "elbafs", elbafs);
+
+	for (i = 0; i <= ns->nlbaf; i++) {
+		struct json_object *elbaf = json_create_object();
+		unsigned int elbaf_val = le32_to_cpu(nvm_ns->elbaf[i]);
+
+		obj_add_uint(elbaf, "sts", elbaf_val & 0x7F);
+		obj_add_uint(elbaf, "pif", (elbaf_val >> 7) & 0x3);
+
+		array_add_obj(elbafs, elbaf);
+	}
+
+	json_print(r);
+}
+
+static void json_nvme_zns_id_ctrl(struct nvme_zns_id_ctrl *ctrl)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_int(r, "zasl", ctrl->zasl);
+
+	json_print(r);
+}
+
+static void json_nvme_zns_id_ns(struct nvme_zns_id_ns *ns,
+				struct nvme_id_ns *id_ns)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *lbafs = json_create_array();
+	int i;
+
+	obj_add_int(r, "zoc", le16_to_cpu(ns->zoc));
+	obj_add_int(r, "ozcs", le16_to_cpu(ns->ozcs));
+	obj_add_uint(r, "mar", le32_to_cpu(ns->mar));
+	obj_add_uint(r, "mor", le32_to_cpu(ns->mor));
+	obj_add_uint(r, "rrl", le32_to_cpu(ns->rrl));
+	obj_add_uint(r, "frl", le32_to_cpu(ns->frl));
+	obj_add_uint(r, "rrl1", le32_to_cpu(ns->rrl1));
+	obj_add_uint(r, "rrl2", le32_to_cpu(ns->rrl2));
+	obj_add_uint(r, "rrl3", le32_to_cpu(ns->rrl3));
+	obj_add_uint(r, "frl1", le32_to_cpu(ns->frl1));
+	obj_add_uint(r, "frl2", le32_to_cpu(ns->frl2));
+	obj_add_uint(r, "frl3", le32_to_cpu(ns->frl3));
+	obj_add_uint(r, "numzrwa", le32_to_cpu(ns->numzrwa));
+	obj_add_int(r, "zrwafg", le16_to_cpu(ns->zrwafg));
+	obj_add_int(r, "zrwasz", le16_to_cpu(ns->zrwasz));
+	obj_add_int(r, "zrwacap", ns->zrwacap);
+
+	obj_add_array(r, "lbafe", lbafs);
+
+	for (i = 0; i <= id_ns->nlbaf; i++) {
+		struct json_object *lbaf = json_create_object();
+
+		obj_add_uint64(lbaf, "zsze", le64_to_cpu(ns->lbafe[i].zsze));
+		obj_add_int(lbaf, "zdes", ns->lbafe[i].zdes);
+
+		array_add_obj(lbafs, lbaf);
+	}
+
+	json_print(r);
+}
+
+static void json_nvme_list_ns(struct nvme_ns_list *ns_list)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid_attrs;
+	struct json_object *valid = json_create_array();
+	int i;
+
+	for (i = 0; i < 1024; i++) {
+		if (ns_list->ns[i]) {
+			valid_attrs = json_create_object();
+			obj_add_uint(valid_attrs, "nsid", le32_to_cpu(ns_list->ns[i]));
+			array_add_obj(valid, valid_attrs);
+		}
+	}
+
+	obj_add_array(r, "nsid_list", valid);
+
+	json_print(r);
+}
+
+static void json_zns_start_zone_list(__u64 nr_zones, struct json_object **zone_list)
+{
+	*zone_list = json_create_array();
+}
+
+static void json_zns_changed(struct nvme_zns_changed_zone_log *log)
+{
+	struct json_object *r = json_create_object();
+	char json_str[STR_LEN];
+	uint16_t nrzid = le16_to_cpu(log->nrzid);
+	int i;
+
+	if (nrzid == 0xFFFF) {
+		obj_add_result(r, "Too many zones have changed to fit into the log. Use report zones for changes.");
+	} else {
+		obj_add_uint(r, "nrzid", nrzid);
+		for (i = 0; i < nrzid; i++) {
+			sprintf(json_str, "zid %03d", i);
+			obj_add_uint64(r, json_str, (uint64_t)le64_to_cpu(log->zid[i]));
+		}
+	}
+
+	json_print(r);
+}
+
+static void json_zns_finish_zone_list(__u64 nr_zones,
+				      struct json_object *zone_list)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "nr_zones", nr_zones);
+	obj_add_array(r, "zone_list", zone_list);
+
+	json_print(r);
+}
+
+static void json_nvme_zns_report_zones(void *report, __u32 descs,
+				       __u8 ext_size, __u32 report_size,
+				       struct json_object *zone_list)
+{
+	struct json_object *zone;
+	struct json_object *ext_data;
+	struct nvme_zone_report *r = report;
+	struct nvme_zns_desc *desc;
+	int i;
+
+	for (i = 0; i < descs; i++) {
+		desc = (struct nvme_zns_desc *)
+			(report + sizeof(*r) + i * (sizeof(*desc) + ext_size));
+		zone = json_create_object();
+
+		obj_add_uint64(zone, "slba", le64_to_cpu(desc->zslba));
+		obj_add_uint64(zone, "wp", le64_to_cpu(desc->wp));
+		obj_add_uint64(zone, "cap", le64_to_cpu(desc->zcap));
+		obj_add_str(zone, "state", nvme_zone_state_to_string(desc->zs >> 4));
+		obj_add_str(zone, "type", nvme_zone_type_to_string(desc->zt));
+		obj_add_uint(zone, "attrs", desc->za);
+		obj_add_uint(zone, "attrs_info", desc->zai);
+
+		if (ext_size) {
+			if (desc->za & NVME_ZNS_ZA_ZDEV) {
+				ext_data = json_create_array();
+				d_json((unsigned char *)desc + sizeof(*desc),
+					ext_size, 16, 1, ext_data);
+				obj_add_array(zone, "ext_data", ext_data);
+			} else {
+				obj_add_str(zone, "ext_data", "Not valid");
+			}
+		}
+
+		array_add_obj(zone_list, zone);
+	}
+}
+
+static void json_feature_show_fields_arbitration(struct json_object *r, unsigned int result)
+{
+	char json_str[STR_LEN];
+
+	obj_add_uint(r, "High Priority Weight (HPW)", ((result & 0xff000000) >> 24) + 1);
+	obj_add_uint(r, "Medium Priority Weight (MPW)", ((result & 0xff0000) >> 16) + 1);
+	obj_add_uint(r, "Low Priority Weight (LPW)", ((result & 0xff00) >> 8) + 1);
+
+	if ((result & 7) == 7)
+		sprintf(json_str, "No limit");
+	else
+		sprintf(json_str, "%u", 1 << (result & 7));
+
+	obj_add_str(r, "Arbitration Burst (AB)", json_str);
+}
+
+static void json_feature_show_fields_power_mgmt(struct json_object *r, unsigned int result)
+{
+	__u8 field = (result & 0xe0) >> 5;
+
+	obj_add_uint(r, "Workload Hint (WH)", field);
+	obj_add_str(r, "WH description", nvme_feature_wl_hints_to_string(field));
+	obj_add_uint(r, "Power State (PS)", result & 0x1f);
+}
+
+static void json_lba_range_entry(struct nvme_lba_range_type *lbrt, int nr_ranges,
+				 struct json_object *r)
+{
+	char json_str[STR_LEN];
+	struct json_object *lbare;
+	int i;
+	int j;
+	struct json_object *lbara = json_create_array();
+
+	obj_add_array(r, "LBA Ranges", lbara);
+
+	for (i = 0; i <= nr_ranges; i++) {
+		lbare = json_create_object();
+		array_add_obj(lbara, lbare);
+
+		obj_add_int(lbare, "LBA range", i);
+
+		obj_add_uint_nx(lbare, "type", lbrt->entry[i].type);
+
+		obj_add_str(lbare, "type description",
+			    nvme_feature_lba_type_to_string(lbrt->entry[i].type));
+
+		obj_add_uint_nx(lbare, "attributes", lbrt->entry[i].attributes);
+
+		obj_add_str(lbare, "attribute[0]", lbrt->entry[i].attributes & 1 ?
+			    "LBA range may be overwritten" : "LBA range should not be overwritten");
+
+		obj_add_str(lbare, "attribute[1]", lbrt->entry[i].attributes & 2 ?
+			    "LBA range should be hidden from the OS/EFI/BIOS" :
+			    "LBA range should be visible from the OS/EFI/BIOS");
+
+		obj_add_nprix64(lbare, "slba", le64_to_cpu(lbrt->entry[i].slba));
+
+		obj_add_nprix64(lbare, "nlb", le64_to_cpu(lbrt->entry[i].nlb));
+
+		for (j = 0; j < ARRAY_SIZE(lbrt->entry[i].guid); j++)
+			sprintf(&json_str[j * 2], "%02x", lbrt->entry[i].guid[j]);
+
+		obj_add_str(lbare, "guid", json_str);
+	}
+}
+
+static void json_feature_show_fields_lba_range(struct json_object *r, __u8 field,
+					       unsigned char *buf)
+{
+	obj_add_uint(r, "Number of LBA Ranges (NUM)", field + 1);
+
+	if (buf)
+		json_lba_range_entry((struct nvme_lba_range_type *)buf, field, r);
+}
+
+static void json_feature_show_fields_temp_thresh(struct json_object *r, unsigned int result)
+{
+	__u8 field = (result & 0x300000) >> 20;
+	char json_str[STR_LEN];
+
+	obj_add_uint(r, "Threshold Type Select (THSEL)", field);
+	obj_add_str(r, "THSEL description", nvme_feature_temp_type_to_string(field));
+
+	field = (result & 0xf0000) >> 16;
+
+	obj_add_uint(r, "Threshold Temperature Select (TMPSEL)", field);
+	obj_add_str(r, "TMPSEL description", nvme_feature_temp_sel_to_string(field));
+
+	sprintf(json_str, "%ld Celsius", kelvin_to_celsius(result & 0xffff));
+	obj_add_str(r, "Temperature Threshold (TMPTH)", json_str);
+
+	sprintf(json_str, "%u K", result & 0xffff);
+	obj_add_str(r, "TMPTH kelvin", json_str);
+}
+
+static void json_feature_show_fields_err_recovery(struct json_object *r, unsigned int result)
+{
+	char json_str[STR_LEN];
+
+	obj_add_str(r, "Deallocated or Unwritten Logical Block Error Enable (DULBE)",
+		     (result & 0x10000) >> 16 ? "Enabled" : "Disabled");
+
+	sprintf(json_str, "%u ms", (result & 0xffff) * 100);
+	obj_add_str(r, "Time Limited Error Recovery (TLER)", json_str);
+}
+
+static void json_feature_show_fields_volatile_wc(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Volatile Write Cache Enable (WCE)", result & 1 ? "Enabled" : "Disabled");
+}
+
+static void json_feature_show_fields_num_queues(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "Number of IO Completion Queues Allocated (NCQA)",
+		     ((result & 0xffff0000) >> 16) + 1);
+	obj_add_uint(r, "Number of IO Submission Queues Allocated (NSQA)", (result & 0xffff) + 1);
+}
+
+static void json_feature_show_fields_irq_coalesce(struct json_object *r, unsigned int result)
+{
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%u usec", ((result & 0xff00) >> 8) * 100);
+	obj_add_str(r, "Aggregation Time (TIME)", json_str);
+
+	obj_add_uint(r, "Aggregation Threshold (THR)", (result & 0xff) + 1);
+}
+
+static void json_feature_show_fields_irq_config(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Coalescing Disable (CD)", (result & 0x10000) >> 16 ? "True" : "False");
+	obj_add_uint(r, "Interrupt Vector (IV)", result & 0xffff);
+}
+
+static void json_feature_show_fields_write_atomic(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Disable Normal (DN)", result & 1 ? "True" : "False");
+}
+
+static void json_feature_show_fields_async_event(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Discovery Log Page Change Notices", (result & 0x80000000) >> 31 ?
+		     "Send async event" : "Do not send async event");
+	obj_add_str(r, "Endurance Group Event Aggregate Log Change Notices", (result & 0x4000) >> 14 ?
+		     "Send async event" : "Do not send async event");
+	obj_add_str(r, "LBA Status Information Notices", (result & 0x2000) >> 13 ?
+		     "Send async event" : "Do not send async event");
+	obj_add_str(r, "Predictable Latency Event Aggregate Log Change Notices",
+		     (result & 0x1000) >> 12 ? "Send async event" : "Do not send async event");
+	obj_add_str(r, "Asymmetric Namespace Access Change Notices", (result & 0x800) >> 11 ?
+		     "Send async event" : "Do not send async event");
+	obj_add_str(r, "Telemetry Log Notices", (result & 0x400) >> 10 ? "Send async event" :
+		     "Do not send async event");
+	obj_add_str(r, "Firmware Activation Notices", (result & 0x200) >> 9 ? "Send async event" :
+		     "Do not send async event");
+	obj_add_str(r, "Namespace Attribute Notices", (result & 0x100) >> 8 ? "Send async event" :
+		     "Do not send async event");
+	obj_add_str(r, "SMART / Health Critical Warnings", result & 0xff ? "Send async event" :
+		     "Do not send async event");
+}
+
+static void json_auto_pst(struct nvme_feat_auto_pst *apst, struct json_object *r)
+{
+	int i;
+	__u64 value;
+	char json_str[STR_LEN];
+	struct json_object *apsta = json_create_array();
+	struct json_object *apste;
+
+	obj_add_array(r, "Auto PST Entries", apsta);
+
+	for (i = 0; i < ARRAY_SIZE(apst->apst_entry); i++) {
+		apste = json_create_object();
+		array_add_obj(apsta, apste);
+		sprintf(json_str, "%2d", i);
+		obj_add_str(apste, "entry", json_str);
+		value = le64_to_cpu(apst->apst_entry[i]);
+		sprintf(json_str, "%u ms", (__u32)NVME_GET(value, APST_ENTRY_ITPT));
+		obj_add_str(apste, "Idle Time Prior to Transition (ITPT)", json_str);
+		obj_add_uint(apste, "Idle Transition Power State (ITPS)",
+			     (__u32)NVME_GET(value, APST_ENTRY_ITPS));
+	}
+}
+
+static void json_feature_show_fields_auto_pst(struct json_object *r, unsigned int result,
+					      unsigned char *buf)
+{
+	obj_add_str(r, "Autonomous Power State Transition Enable (APSTE)", result & 1 ? "Enabled" :
+		     "Disabled");
+
+	if (buf)
+		json_auto_pst((struct nvme_feat_auto_pst *)buf, r);
+}
+
+static void json_host_mem_buffer(struct nvme_host_mem_buf_attrs *hmb, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	obj_add_uint(r, "Host Memory Descriptor List Entry Count (HMDLEC)", le32_to_cpu(hmb->hmdlec));
+
+	sprintf(json_str, "0x%x", le32_to_cpu(hmb->hmdlau));
+	obj_add_str(r, "Host Memory Descriptor List Address (HMDLAU)", json_str);
+
+	sprintf(json_str, "0x%x", le32_to_cpu(hmb->hmdlal));
+	obj_add_str(r, "Host Memory Descriptor List Address (HMDLAL)", json_str);
+
+	obj_add_uint(r, "Host Memory Buffer Size (HSIZE)", le32_to_cpu(hmb->hsize));
+}
+
+static void json_feature_show_fields_host_mem_buf(struct json_object *r, unsigned int result,
+						  unsigned char *buf)
+{
+	obj_add_str(r, "Enable Host Memory (EHM)", result & 1 ? "Enabled" : "Disabled");
+
+	if (buf)
+		json_host_mem_buffer((struct nvme_host_mem_buf_attrs *)buf, r);
+}
+
+static void json_timestamp(struct json_object *r, struct nvme_timestamp *ts)
+{
+	char buffer[BUF_LEN];
+	time_t timestamp = int48_to_long(ts->timestamp) / 1000;
+	struct tm *tm = localtime(&timestamp);
+
+	obj_add_uint64(r, "timestamp", int48_to_long(ts->timestamp));
+
+	if(!strftime(buffer, sizeof(buffer), "%c %Z", tm))
+		sprintf(buffer, "%s", "-");
+
+	obj_add_str(r, "timestamp string", buffer);
+
+	obj_add_str(r, "timestamp origin", ts->attr & 2 ?
+	    "The Timestamp field was initialized with a Timestamp value using a Set Features command." :
+	    "The Timestamp field was initialized to 0h by a Controller Level Reset.");
+
+	obj_add_str(r, "synch", ts->attr & 1 ?
+	    "The controller may have stopped counting during vendor specific intervals after the Timestamp value was initialized." :
+	    "The controller counted time in milliseconds continuously since the Timestamp value was initialized.");
+}
+
+static void json_feature_show_fields_timestamp(struct json_object *r, unsigned char *buf)
+{
+	if (buf)
+		json_timestamp(r, (struct nvme_timestamp *)buf);
+}
+
+static void json_feature_show_fields_kato(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "Keep Alive Timeout (KATO) in milliseconds", result);
+}
+
+static void json_feature_show_fields_hctm(struct json_object *r, unsigned int result)
+{
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%u K", result >> 16);
+	obj_add_str(r, "Thermal Management Temperature 1 (TMT1)", json_str);
+
+	sprintf(json_str, "%ld Celsius", kelvin_to_celsius(result >> 16));
+	obj_add_str(r, "TMT1 celsius", json_str);
+
+	sprintf(json_str, "%u K", result & 0xffff);
+	obj_add_str(r, "Thermal Management Temperature 2", json_str);
+
+	sprintf(json_str, "%ld Celsius", kelvin_to_celsius(result & 0xffff));
+	obj_add_str(r, "TMT2 celsius", json_str);
+}
+
+static void json_feature_show_fields_nopsc(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Non-Operational Power State Permissive Mode Enable (NOPPME)", result & 1 ?
+		    "True" : "False");
+}
+
+static void json_feature_show_fields_rrl(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "Read Recovery Level (RRL)", result & 0xf);
+}
+
+static void json_plm_config(struct nvme_plm_config *plmcfg, struct json_object *r)
+{
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%04x", le16_to_cpu(plmcfg->ee));
+	obj_add_str(r, "Enable Event", json_str);
+
+	obj_add_uint64(r, "DTWIN Reads Threshold", le64_to_cpu(plmcfg->dtwinrt));
+	obj_add_uint64(r, "DTWIN Writes Threshold", le64_to_cpu(plmcfg->dtwinwt));
+	obj_add_uint64(r, "DTWIN Time Threshold", le64_to_cpu(plmcfg->dtwintt));
+}
+
+static void json_feature_show_fields_plm_config(struct json_object *r, unsigned int result,
+						unsigned char *buf)
+{
+	obj_add_str(r, "Predictable Latency Window Enabled", result & 1 ? "True" : "False");
+
+	if (buf)
+		json_plm_config((struct nvme_plm_config *)buf, r);
+}
+
+static void json_feature_show_fields_plm_window(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Window Select", nvme_plm_window_to_string(result));
+}
+
+static void json_feature_show_fields_lba_sts_interval(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "LBA Status Information Poll Interval (LSIPI)", result >> 16);
+	obj_add_uint(r, "LBA Status Information Report Interval (LSIRI)", result & 0xffff);
+}
+
+static void json_feature_show_fields_host_behavior(struct json_object *r, unsigned char *buf)
+{
+	if (buf)
+		obj_add_str(r, "Host Behavior Support", buf[0] & 0x1 ? "True" : "False");
+}
+
+static void json_feature_show_fields_sanitize(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "No-Deallocate Response Mode (NODRM)", result & 1);
+}
+
+static void json_feature_show_fields_endurance_evt_cfg(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "Endurance Group Identifier (ENDGID)", result & 0xffff);
+	obj_add_uint(r, "Endurance Group Critical Warnings", result >> 16 & 0xff);
+}
+
+static void json_feature_show_fields_iocs_profile(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "I/O Command Set Profile", result & 0x1 ? "True" : "False");
+}
+
+static void json_feature_show_fields_spinup_control(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Spinup control feature Enabled", result & 1 ? "True" : "False");
+}
+
+static void json_host_metadata(struct json_object *r, enum nvme_features_id fid,
+			       struct nvme_host_metadata *data)
+{
+	struct nvme_metadata_element_desc *desc = &data->descs[0];
+	int i;
+	char val[VAL_LEN];
+	__u16 len;
+	char json_str[STR_LEN];
+	struct json_object *desca = json_create_array();
+	struct json_object *desce;
+
+	obj_add_int(r, "Num Metadata Element Descriptors", data->ndesc);
+
+	obj_add_array(r, "Metadata Element Descriptors", desca);
+
+	for (i = 0; i < data->ndesc; i++) {
+		desce = json_create_object();
+		array_add_obj(desca, desce);
+
+		obj_add_int(desce, "Element", i);
+
+		sprintf(json_str, "0x%02x", desc->type);
+		obj_add_str(desce, "Type", json_str);
+
+		obj_add_str(desce, "Type definition",
+			    nvme_host_metadata_type_to_string(fid, desc->type));
+
+		obj_add_int(desce, "Revision", desc->rev);
+
+		len = le16_to_cpu(desc->len);
+		obj_add_int(desce, "Length", len);
+
+		strncpy(val, (char *)desc->val, min(sizeof(val) - 1, len));
+		obj_add_str(desce, "Value", val);
+
+		desc = (struct nvme_metadata_element_desc *)&desc->val[desc->len];
+	}
+}
+
+static void json_feature_show_fields_ns_metadata(struct json_object *r, enum nvme_features_id fid,
+						 unsigned char *buf)
+{
+	if (buf)
+		json_host_metadata(r, fid, (struct nvme_host_metadata *)buf);
+}
+
+static void json_feature_show_fields_sw_progress(struct json_object *r, unsigned int result)
+{
+	obj_add_uint(r, "Pre-boot Software Load Count (PBSLC)", result & 0xff);
+}
+
+static void json_feature_show_fields_host_id(struct json_object *r, unsigned char *buf)
+{
+	uint64_t ull = 0;
+	int i;
+
+	if (buf) {
+		for (i = sizeof(ull) / sizeof(*buf); i; i--) {
+			ull |=  buf[i - 1];
+			if (i - 1)
+				ull <<= BYTE_TO_BIT(sizeof(buf[i]));
+		}
+		obj_add_uint64(r, "Host Identifier (HOSTID)", ull);
+	}
+}
+
+static void json_feature_show_fields_resv_mask(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Mask Reservation Preempted Notification (RESPRE)", (result & 8) >> 3 ?
+		     "True" : "False");
+	obj_add_str(r, "Mask Reservation Released Notification (RESREL)", (result & 4) >> 2 ?
+		     "True" : "False");
+	obj_add_str(r, "Mask Registration Preempted Notification (REGPRE)", (result & 2) >> 1 ?
+		     "True" : "False");
+}
+
+static void json_feature_show_fields_resv_persist(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Persist Through Power Loss (PTPL)", result & 1 ? "True" : "False");
+}
+
+static void json_feature_show_fields_write_protect(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Namespace Write Protect", nvme_ns_wp_cfg_to_string(result));
+}
+
+static void json_feature_show_fields_fdp(struct json_object *r, unsigned int result)
+{
+	obj_add_str(r, "Flexible Direct Placement Enable (FDPE)", result & 1 ? "Yes" : "No");
+	obj_add_uint(r, "Flexible Direct Placement Configuration Index", result >> 8 & 0xf);
+}
+
+static void json_feature_show_fields_fdp_events(struct json_object *r, unsigned int result,
+						unsigned char *buf)
+{
+	unsigned int i;
+	struct nvme_fdp_supported_event_desc *d;
+	char json_str[STR_LEN];
+
+	for (i = 0; i < result; i++) {
+		d = &((struct nvme_fdp_supported_event_desc *)buf)[i];
+		sprintf(json_str, "%s", d->evta & 0x1 ? "Enabled" : "Not enabled");
+		obj_add_str(r, nvme_fdp_event_to_string(d->evt), json_str);
+	}
+}
+
+static void json_feature_show(enum nvme_features_id fid, int sel, unsigned int result)
+{
+	struct json_object *r;
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "feature: %#0*x", fid ? 4 : 2, fid);
+	r = obj_create(json_str);
+
+	obj_add_str(r, "name", nvme_feature_to_string(fid));
+
+	sprintf(json_str, "%#0*x", result ? 10 : 8, result);
+	obj_add_str(r, nvme_select_to_string(sel), json_str);
+
+	json_print(r);
+}
+
+static void json_feature_show_fields(enum nvme_features_id fid, unsigned int result,
+				     unsigned char *buf)
+{
+	struct json_object *r;
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "Feature: %#0*x", fid ? 4 : 2, fid);
+	r = obj_create(json_str);
+
+	switch (fid) {
+	case NVME_FEAT_FID_ARBITRATION:
+		json_feature_show_fields_arbitration(r, result);
+		break;
+	case NVME_FEAT_FID_POWER_MGMT:
+		json_feature_show_fields_power_mgmt(r, result);
+		break;
+	case NVME_FEAT_FID_LBA_RANGE:
+		json_feature_show_fields_lba_range(r, result & 0x3f, buf);
+		break;
+	case NVME_FEAT_FID_TEMP_THRESH:
+		json_feature_show_fields_temp_thresh(r, result);
+		break;
+	case NVME_FEAT_FID_ERR_RECOVERY:
+		json_feature_show_fields_err_recovery(r, result);
+		break;
+	case NVME_FEAT_FID_VOLATILE_WC:
+		json_feature_show_fields_volatile_wc(r, result);
+		break;
+	case NVME_FEAT_FID_NUM_QUEUES:
+		json_feature_show_fields_num_queues(r, result);
+		break;
+	case NVME_FEAT_FID_IRQ_COALESCE:
+		json_feature_show_fields_irq_coalesce(r, result);
+		break;
+	case NVME_FEAT_FID_IRQ_CONFIG:
+		json_feature_show_fields_irq_config(r, result);
+		break;
+	case NVME_FEAT_FID_WRITE_ATOMIC:
+		json_feature_show_fields_write_atomic(r, result);
+		break;
+	case NVME_FEAT_FID_ASYNC_EVENT:
+		json_feature_show_fields_async_event(r, result);
+		break;
+	case NVME_FEAT_FID_AUTO_PST:
+		json_feature_show_fields_auto_pst(r, result, buf);
+		break;
+	case NVME_FEAT_FID_HOST_MEM_BUF:
+		json_feature_show_fields_host_mem_buf(r, result, buf);
+		break;
+	case NVME_FEAT_FID_TIMESTAMP:
+		json_feature_show_fields_timestamp(r, buf);
+		break;
+	case NVME_FEAT_FID_KATO:
+		json_feature_show_fields_kato(r, result);
+		break;
+	case NVME_FEAT_FID_HCTM:
+		json_feature_show_fields_hctm(r, result);
+		break;
+	case NVME_FEAT_FID_NOPSC:
+		json_feature_show_fields_nopsc(r, result);
+		break;
+	case NVME_FEAT_FID_RRL:
+		json_feature_show_fields_rrl(r, result);
+		break;
+	case NVME_FEAT_FID_PLM_CONFIG:
+		json_feature_show_fields_plm_config(r, result, buf);
+		break;
+	case NVME_FEAT_FID_PLM_WINDOW:
+		json_feature_show_fields_plm_window(r, result);
+		break;
+	case NVME_FEAT_FID_LBA_STS_INTERVAL:
+		json_feature_show_fields_lba_sts_interval(r, result);
+		break;
+	case NVME_FEAT_FID_HOST_BEHAVIOR:
+		json_feature_show_fields_host_behavior(r, buf);
+		break;
+	case NVME_FEAT_FID_SANITIZE:
+		json_feature_show_fields_sanitize(r, result);
+		break;
+	case NVME_FEAT_FID_ENDURANCE_EVT_CFG:
+		json_feature_show_fields_endurance_evt_cfg(r, result);
+		break;
+	case NVME_FEAT_FID_IOCS_PROFILE:
+		json_feature_show_fields_iocs_profile(r, result);
+		break;
+	case NVME_FEAT_FID_SPINUP_CONTROL:
+		json_feature_show_fields_spinup_control(r, result);
+		break;
+	case NVME_FEAT_FID_ENH_CTRL_METADATA:
+		fallthrough;
+	case NVME_FEAT_FID_CTRL_METADATA:
+		fallthrough;
+	case NVME_FEAT_FID_NS_METADATA:
+		json_feature_show_fields_ns_metadata(r, fid, buf);
+		break;
+	case NVME_FEAT_FID_SW_PROGRESS:
+		json_feature_show_fields_sw_progress(r, result);
+		break;
+	case NVME_FEAT_FID_HOST_ID:
+		json_feature_show_fields_host_id(r, buf);
+		break;
+	case NVME_FEAT_FID_RESV_MASK:
+		json_feature_show_fields_resv_mask(r, result);
+		break;
+	case NVME_FEAT_FID_RESV_PERSIST:
+		json_feature_show_fields_resv_persist(r, result);
+		break;
+	case NVME_FEAT_FID_WRITE_PROTECT:
+		json_feature_show_fields_write_protect(r, result);
+		break;
+	case NVME_FEAT_FID_FDP:
+		json_feature_show_fields_fdp(r, result);
+		break;
+	case NVME_FEAT_FID_FDP_EVENTS:
+		json_feature_show_fields_fdp_events(r, result, buf);
+		break;
+	default:
+		break;
+	}
+
+	json_print(r);
+}
+
+void json_id_ctrl_rpmbs(__le32 ctrl_rpmbs)
+{
+	struct json_object *r = json_create_object();
+	__u32 rpmbs = le32_to_cpu(ctrl_rpmbs);
+	__u32 asz = (rpmbs & 0xFF000000) >> 24;
+	__u32 tsz = (rpmbs & 0xFF0000) >> 16;
+	__u32 rsvd = (rpmbs & 0xFFC0) >> 6;
+	__u32 auth = (rpmbs & 0x38) >> 3;
+	__u32 rpmb = rpmbs & 7;
+
+	obj_add_uint_nx(r, "[31:24]: Access Size", asz);
+	obj_add_uint_nx(r, "[23:16]: Total Size", tsz);
+
+	if (rsvd)
+		obj_add_uint_nx(r, "[15:6]: Reserved", rsvd);
+
+	obj_add_uint_nx(r, "[5:3]: Authentication Method", auth);
+	obj_add_uint_nx(r, "[2:0]: Number of RPMB Units", rpmb);
+
+	json_print(r);
+}
+
+static void json_lba_range(struct nvme_lba_range_type *lbrt, int nr_ranges)
+{
+	struct json_object *r = json_create_object();
+
+	json_lba_range_entry(lbrt, nr_ranges, r);
+
+	json_print(r);
+}
+
+static void json_lba_status_info(__u32 result)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "LBA Status Information Poll Interval (LSIPI)", (result >> 16) & 0xffff);
+	obj_add_uint(r, "LBA Status Information Report Interval (LSIRI)", result & 0xffff);
+
+	json_print(r);
+}
+
+void json_d(unsigned char *buf, int len, int width, int group)
+{
+	struct json_object *r = json_r ? json_r : json_create_object();
+	char json_str[STR_LEN];
+	struct json_object *data = json_create_array();
+
+	sprintf(json_str, "data: buf=%p len=%d width=%d group=%d", buf, len, width, group);
+	d_json(buf, len, width, group, data);
+	obj_add_array(r, json_str, data);
+
+	json_print(r);
+}
+
+static void json_nvme_list_ctrl(struct nvme_ctrl_list *ctrl_list)
+{
+	__u16 num = le16_to_cpu(ctrl_list->num);
+	struct json_object *r = json_create_object();
+	struct json_object *valid_attrs;
+	struct json_object *valid = json_create_array();
+	int i;
+
+	obj_add_uint(r, "num_ctrl", le16_to_cpu(ctrl_list->num));
+
+	for (i = 0; i < min(num, 2047); i++) {
+		valid_attrs = json_create_object();
+		obj_add_uint(valid_attrs, "ctrl_id", le16_to_cpu(ctrl_list->identifier[i]));
+		array_add_obj(valid, valid_attrs);
+	}
+
+	obj_add_array(r, "ctrl_list", valid);
+
+	json_print(r);
+}
+
+static void json_nvme_id_nvmset(struct nvme_id_nvmset_list *nvmset,
+				unsigned int nvmeset_id)
+{
+	__u32 nent = nvmset->nid;
+	struct json_object *entries = json_create_array();
+	struct json_object *r = json_create_object();
+	int i;
+
+	obj_add_int(r, "nid", nent);
+
+	for (i = 0; i < nent; i++) {
+		struct json_object *entry = json_create_object();
+
+		obj_add_int(entry, "nvmset_id", le16_to_cpu(nvmset->ent[i].nvmsetid));
+		obj_add_int(entry, "endurance_group_id", le16_to_cpu(nvmset->ent[i].endgid));
+		obj_add_uint(entry, "random_4k_read_typical", le32_to_cpu(nvmset->ent[i].rr4kt));
+		obj_add_uint(entry, "optimal_write_size", le32_to_cpu(nvmset->ent[i].ows));
+		obj_add_uint128(entry, "total_nvmset_cap", le128_to_cpu(nvmset->ent[i].tnvmsetcap));
+		obj_add_uint128(entry, "unalloc_nvmset_cap",
+				le128_to_cpu(nvmset->ent[i].unvmsetcap));
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "NVMSet", entries);
+
+	json_print(r);
+}
+
+static void json_nvme_primary_ctrl_cap(const struct nvme_primary_ctrl_cap *caps)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_uint(r, "cntlid", le16_to_cpu(caps->cntlid));
+	obj_add_uint(r, "portid", le16_to_cpu(caps->portid));
+	obj_add_uint(r, "crt", caps->crt);
+
+	obj_add_uint(r, "vqfrt", le32_to_cpu(caps->vqfrt));
+	obj_add_uint(r, "vqrfa", le32_to_cpu(caps->vqrfa));
+	obj_add_int(r, "vqrfap", le16_to_cpu(caps->vqrfap));
+	obj_add_int(r, "vqprt", le16_to_cpu(caps->vqprt));
+	obj_add_int(r, "vqfrsm", le16_to_cpu(caps->vqfrsm));
+	obj_add_int(r, "vqgran", le16_to_cpu(caps->vqgran));
+
+	obj_add_uint(r, "vifrt", le32_to_cpu(caps->vifrt));
+	obj_add_uint(r, "virfa", le32_to_cpu(caps->virfa));
+	obj_add_int(r, "virfap", le16_to_cpu(caps->virfap));
+	obj_add_int(r, "viprt",  le16_to_cpu(caps->viprt));
+	obj_add_int(r, "vifrsm", le16_to_cpu(caps->vifrsm));
+	obj_add_int(r, "vigran", le16_to_cpu(caps->vigran));
+
+	json_print(r);
+}
+
+static void json_nvme_list_secondary_ctrl(const struct nvme_secondary_ctrl_list *sc_list,
+					  __u32 count)
+{
+	const struct nvme_secondary_ctrl *sc_entry = &sc_list->sc_entry[0];
+	__u32 nent = min(sc_list->num, count);
+	struct json_object *entries = json_create_array();
+	struct json_object *r = json_create_object();
+	int i;
+
+	obj_add_int(r, "num", nent);
+
+	for (i = 0; i < nent; i++) {
+		struct json_object *entry = json_create_object();
+
+		obj_add_int(entry, "secondary-controller-identifier",
+			    le16_to_cpu(sc_entry[i].scid));
+		obj_add_int(entry, "primary-controller-identifier", le16_to_cpu(sc_entry[i].pcid));
+		obj_add_int(entry, "secondary-controller-state", sc_entry[i].scs);
+		obj_add_int(entry, "virtual-function-number", le16_to_cpu(sc_entry[i].vfn));
+		obj_add_int(entry, "num-virtual-queues", le16_to_cpu(sc_entry[i].nvq));
+		obj_add_int(entry, "num-virtual-interrupts", le16_to_cpu(sc_entry[i].nvi));
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "secondary-controllers", entries);
+
+	json_print(r);
+}
+
+static void json_nvme_id_ns_granularity_list(
+		const struct nvme_id_ns_granularity_list *glist)
+{
+	int i;
+	struct json_object *r = json_create_object();
+	struct json_object *entries = json_create_array();
+
+	obj_add_int(r, "attributes", glist->attributes);
+	obj_add_int(r, "num-descriptors", glist->num_descriptors);
+
+	for (i = 0; i <= glist->num_descriptors; i++) {
+		struct json_object *entry = json_create_object();
+
+		obj_add_uint64(entry, "namespace-size-granularity",
+			       le64_to_cpu(glist->entry[i].nszegran));
+		obj_add_uint64(entry, "namespace-capacity-granularity",
+			       le64_to_cpu(glist->entry[i].ncapgran));
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "namespace-granularity-list", entries);
+
+	json_print(r);
+}
+
+static void json_nvme_id_uuid_list(const struct nvme_id_uuid_list *uuid_list)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *entries = json_create_array();
+	int i;
+
+	for (i = 0; i < NVME_ID_UUID_LIST_MAX; i++) {
+		__u8 uuid[NVME_UUID_LEN];
+		struct json_object *entry = json_create_object();
+
+		/* The list is terminated by a zero UUID value */
+		if (memcmp(uuid_list->entry[i].uuid, zero_uuid, sizeof(zero_uuid)) == 0)
+			break;
+		memcpy(&uuid, uuid_list->entry[i].uuid, sizeof(uuid));
+		obj_add_int(entry, "association",
+			uuid_list->entry[i].header & 0x3);
+		obj_add_str(entry, "uuid",
+			util_uuid_to_string(uuid));
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "UUID-list", entries);
+
+	json_print(r);
+}
+
+static void json_id_domain_list(struct nvme_id_domain_list *id_dom)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *entries = json_create_array();
+	struct json_object *entry;
+	int i;
+	nvme_uint128_t dom_cap, unalloc_dom_cap, max_egrp_dom_cap;
+
+	obj_add_uint(r, "num_dom_entries", id_dom->num);
+
+	for (i = 0; i < id_dom->num; i++) {
+		entry = json_create_object();
+		dom_cap = le128_to_cpu(id_dom->domain_attr[i].dom_cap);
+		unalloc_dom_cap = le128_to_cpu(id_dom->domain_attr[i].unalloc_dom_cap);
+		max_egrp_dom_cap = le128_to_cpu(id_dom->domain_attr[i].max_egrp_dom_cap);
+
+		obj_add_uint(entry, "dom_id", le16_to_cpu(id_dom->domain_attr[i].dom_id));
+		obj_add_uint128(entry, "dom_cap", dom_cap);
+		obj_add_uint128(entry, "unalloc_dom_cap", unalloc_dom_cap);
+		obj_add_uint128(entry, "max_egrp_dom_cap", max_egrp_dom_cap);
+
+		array_add_obj(entries, entry);
+	}
+
+	obj_add_array(r, "domain_list", entries);
+
+	json_print(r);
+}
+
+static void json_nvme_endurance_group_list(struct nvme_id_endurance_group_list *endgrp_list)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid_attrs;
+	struct json_object *valid = json_create_array();
+	int i;
+
+	obj_add_uint(r, "num_endgrp_id", le16_to_cpu(endgrp_list->num));
+
+	for (i = 0; i < min(le16_to_cpu(endgrp_list->num), 2047); i++) {
+		valid_attrs = json_create_object();
+		obj_add_uint(valid_attrs, "endgrp_id", le16_to_cpu(endgrp_list->identifier[i]));
+		array_add_obj(valid, valid_attrs);
+	}
+
+	obj_add_array(r, "endgrp_list", valid);
+
+	json_print(r);
+}
+
+static void json_support_log(struct nvme_supported_log_pages *support_log,
+			     const char *devname)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *valid = json_create_array();
+	struct json_object *valid_attrs;
+	unsigned int lid;
+	char key[128];
+	__u32 support;
+
+	for (lid = 0; lid < 256; lid++) {
+		support = le32_to_cpu(support_log->lid_support[lid]);
+		if (support & 0x1) {
+			valid_attrs = json_create_object();
+			sprintf(key, "lid_0x%x ", lid);
+			obj_add_uint(valid_attrs, key, support);
+			array_add_obj(valid, valid_attrs);
+		}
+	}
+
+	obj_add_array(r, "supported_logs", valid);
+
+	json_print(r);
+}
+
+static void json_detail_list(nvme_root_t t)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *jdev = json_create_array();
+
+	nvme_host_t h;
+	nvme_subsystem_t s;
+	nvme_ctrl_t c;
+	nvme_path_t p;
+	nvme_ns_t n;
+
+	nvme_for_each_host(t, h) {
+		struct json_object *hss = json_create_object();
+		struct json_object *jsslist = json_create_array();
+		const char *hostid;
+
+		obj_add_str(hss, "HostNQN", nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			obj_add_str(hss, "HostID", hostid);
+
+		nvme_for_each_subsystem(h , s) {
+			struct json_object *jss = json_create_object();
+			struct json_object *jctrls = json_create_array();
+			struct json_object *jnss = json_create_array();
+
+			obj_add_str(jss, "Subsystem", nvme_subsystem_get_name(s));
+			obj_add_str(jss, "SubsystemNQN", nvme_subsystem_get_nqn(s));
+
+			nvme_subsystem_for_each_ctrl(s, c) {
+				struct json_object *jctrl = json_create_object();
+				struct json_object *jnss = json_create_array();
+				struct json_object *jpaths = json_create_array();
+
+				obj_add_str(jctrl, "Controller", nvme_ctrl_get_name(c));
+				obj_add_str(jctrl, "SerialNumber", nvme_ctrl_get_serial(c));
+				obj_add_str(jctrl, "ModelNumber", nvme_ctrl_get_model(c));
+				obj_add_str(jctrl, "Firmware", nvme_ctrl_get_firmware(c));
+				obj_add_str(jctrl, "Transport", nvme_ctrl_get_transport(c));
+				obj_add_str(jctrl, "Address", nvme_ctrl_get_address(c));
+				obj_add_str(jctrl, "Slot", nvme_ctrl_get_phy_slot(c));
+
+				nvme_ctrl_for_each_ns(c, n) {
+					struct json_object *jns = json_create_object();
+					int lba = nvme_ns_get_lba_size(n);
+					uint64_t nsze = nvme_ns_get_lba_count(n) * lba;
+					uint64_t nuse = nvme_ns_get_lba_util(n) * lba;
+
+					obj_add_str(jns, "NameSpace", nvme_ns_get_name(n));
+					obj_add_str(jns, "Generic", nvme_ns_get_generic_name(n));
+					obj_add_int(jns, "NSID", nvme_ns_get_nsid(n));
+					obj_add_uint64(jns, "UsedBytes", nuse);
+					obj_add_uint64(jns, "MaximumLBA", nvme_ns_get_lba_count(n));
+					obj_add_uint64(jns, "PhysicalSize", nsze);
+					obj_add_int(jns, "SectorSize", lba);
+
+					array_add_obj(jnss, jns);
+				}
+				obj_add_obj(jctrl, "Namespaces", jnss);
+
+				nvme_ctrl_for_each_path(c, p) {
+					struct json_object *jpath = json_create_object();
+
+					obj_add_str(jpath, "Path", nvme_path_get_name(p));
+					obj_add_str(jpath, "ANAState", nvme_path_get_ana_state(p));
+
+					array_add_obj(jpaths, jpath);
+				}
+				obj_add_obj(jctrl, "Paths", jpaths);
+
+				array_add_obj(jctrls, jctrl);
+			}
+			obj_add_obj(jss, "Controllers", jctrls);
+
+			nvme_subsystem_for_each_ns(s, n) {
+				struct json_object *jns = json_create_object();
+
+				int lba = nvme_ns_get_lba_size(n);
+				uint64_t nsze = nvme_ns_get_lba_count(n) * lba;
+				uint64_t nuse = nvme_ns_get_lba_util(n) * lba;
+
+				obj_add_str(jns, "NameSpace", nvme_ns_get_name(n));
+				obj_add_str(jns, "Generic", nvme_ns_get_generic_name(n));
+				obj_add_int(jns, "NSID", nvme_ns_get_nsid(n));
+				obj_add_uint64(jns, "UsedBytes", nuse);
+				obj_add_uint64(jns, "MaximumLBA", nvme_ns_get_lba_count(n));
+				obj_add_uint64(jns, "PhysicalSize", nsze);
+				obj_add_int(jns, "SectorSize", lba);
+
+				array_add_obj(jnss, jns);
+			}
+			obj_add_obj(jss, "Namespaces", jnss);
+
+			array_add_obj(jsslist, jss);
+		}
+
+		obj_add_obj(hss, "Subsystems", jsslist);
+		array_add_obj(jdev, hss);
+	}
+
+	obj_add_array(r, "Devices", jdev);
+
+	json_print(r);
+}
+
+static struct json_object *json_list_item_obj(nvme_ns_t n)
+{
+	struct json_object *r = json_create_object();
+	char devname[NAME_LEN] = { 0 };
+	char genname[NAME_LEN] = { 0 };
+	int lba = nvme_ns_get_lba_size(n);
+	uint64_t nsze = nvme_ns_get_lba_count(n) * lba;
+	uint64_t nuse = nvme_ns_get_lba_util(n) * lba;
+
+	nvme_dev_full_path(n, devname, sizeof(devname));
+	nvme_generic_full_path(n, genname, sizeof(genname));
+
+	obj_add_int(r, "NameSpace", nvme_ns_get_nsid(n));
+	obj_add_str(r, "DevicePath", devname);
+	obj_add_str(r, "GenericPath", genname);
+	obj_add_str(r, "Firmware", nvme_ns_get_firmware(n));
+	obj_add_str(r, "ModelNumber", nvme_ns_get_model(n));
+	obj_add_str(r, "SerialNumber", nvme_ns_get_serial(n));
+	obj_add_uint64(r, "UsedBytes", nuse);
+	obj_add_uint64(r, "MaximumLBA", nvme_ns_get_lba_count(n));
+	obj_add_uint64(r, "PhysicalSize", nsze);
+	obj_add_int(r, "SectorSize", lba);
+
+	return r;
+}
+
+static void json_simple_list(nvme_root_t t)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *jdevices = json_create_array();
+
+	nvme_host_t h;
+	nvme_subsystem_t s;
+	nvme_ctrl_t c;
+	nvme_ns_t n;
+
+	nvme_for_each_host(t, h) {
+		nvme_for_each_subsystem(h, s) {
+			nvme_subsystem_for_each_ns(s, n)
+				array_add_obj(jdevices, json_list_item_obj(n));
+
+			nvme_subsystem_for_each_ctrl(s, c)
+				nvme_ctrl_for_each_ns(c, n)
+				array_add_obj(jdevices, json_list_item_obj(n));
+		}
+	}
+
+	obj_add_array(r, "Devices", jdevices);
+
+	json_print(r);
+}
+
+static void json_list_item(nvme_ns_t n)
+{
+	struct json_object *r = json_list_item_obj(n);
+
+	json_print(r);
+}
+
+static void json_print_list_items(nvme_root_t t)
+{
+	if (json_print_ops.flags & VERBOSE)
+		json_detail_list(t);
+	else
+		json_simple_list(t);
+}
+
+static unsigned int json_subsystem_topology_multipath(nvme_subsystem_t s,
+						      json_object *namespaces)
+{
+	nvme_ns_t n;
+	nvme_path_t p;
+	unsigned int i = 0;
+
+	nvme_subsystem_for_each_ns(s, n) {
+		struct json_object *ns_attrs;
+		struct json_object *paths;
+
+		ns_attrs = json_create_object();
+		obj_add_int(ns_attrs, "NSID", nvme_ns_get_nsid(n));
+
+		paths = json_create_array();
+		nvme_namespace_for_each_path(n, p) {
+			struct json_object *path_attrs;
+
+			nvme_ctrl_t c = nvme_path_get_ctrl(p);
+
+			path_attrs = json_create_object();
+			obj_add_str(path_attrs, "Name", nvme_ctrl_get_name(c));
+			obj_add_str(path_attrs, "Transport", nvme_ctrl_get_transport(c));
+			obj_add_str(path_attrs, "Address", nvme_ctrl_get_address(c));
+			obj_add_str(path_attrs, "State", nvme_ctrl_get_state(c));
+			obj_add_str(path_attrs, "ANAState", nvme_path_get_ana_state(p));
+			array_add_obj(paths, path_attrs);
+		}
+		obj_add_array(ns_attrs, "Paths", paths);
+		array_add_obj(namespaces, ns_attrs);
+		i++;
+	}
+
+	return i;
+}
+
+static void json_print_nvme_subsystem_topology(nvme_subsystem_t s,
+					       json_object *namespaces)
+{
+	nvme_ctrl_t c;
+	nvme_ns_t n;
+
+	nvme_subsystem_for_each_ctrl(s, c) {
+		nvme_ctrl_for_each_ns(c, n) {
+			struct json_object *ctrl_attrs;
+			struct json_object *ns_attrs;
+			struct json_object *ctrl;
+
+			ns_attrs = json_create_object();
+			obj_add_int(ns_attrs, "NSID", nvme_ns_get_nsid(n));
+
+			ctrl = json_create_array();
+			ctrl_attrs = json_create_object();
+			obj_add_str(ctrl_attrs, "Name",
+						     nvme_ctrl_get_name(c));
+			obj_add_str(ctrl_attrs, "Transport",
+						     nvme_ctrl_get_transport(c));
+			obj_add_str(ctrl_attrs, "Address",
+						     nvme_ctrl_get_address(c));
+			obj_add_str(ctrl_attrs, "State",
+						     nvme_ctrl_get_state(c));
+
+			array_add_obj(ctrl, ctrl_attrs);
+			obj_add_array(ns_attrs, "Controller", ctrl);
+			array_add_obj(namespaces, ns_attrs);
+		}
+	}
+}
+
+static void json_simple_topology(nvme_root_t r)
+{
+	struct json_object *host_attrs, *subsystem_attrs;
+	struct json_object *subsystems, *namespaces;
+	struct json_object *a = json_create_array();
+	nvme_host_t h;
+
+	nvme_for_each_host(r, h) {
+		nvme_subsystem_t s;
+		const char *hostid;
+
+		host_attrs = json_create_object();
+		obj_add_str(host_attrs, "HostNQN", nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			obj_add_str(host_attrs, "HostID", hostid);
+		subsystems = json_create_array();
+		nvme_for_each_subsystem(h, s) {
+			subsystem_attrs = json_create_object();
+			obj_add_str(subsystem_attrs, "Name", nvme_subsystem_get_name(s));
+			obj_add_str(subsystem_attrs, "NQN", nvme_subsystem_get_nqn(s));
+			obj_add_str(subsystem_attrs, "IOPolicy", nvme_subsystem_get_iopolicy(s));
+
+			array_add_obj(subsystems, subsystem_attrs);
+			namespaces = json_create_array();
+
+			if (!json_subsystem_topology_multipath(s, namespaces))
+				json_print_nvme_subsystem_topology(s, namespaces);
+
+			obj_add_array(subsystem_attrs, "Namespaces", namespaces);
+		}
+		obj_add_array(host_attrs, "Subsystems", subsystems);
+		array_add_obj(a, host_attrs);
+	}
+
+	json_print(a);
+}
+
+static void json_directive_show_fields_identify(__u8 doper, __u8 *field, struct json_object *r)
+{
+	struct json_object *support;
+	struct json_object *enabled;
+	struct json_object *persistent;
+
+	switch (doper) {
+	case NVME_DIRECTIVE_RECEIVE_IDENTIFY_DOPER_PARAM:
+		support = json_create_array();
+		obj_add_array(r, "Directive support", support);
+		obj_add_str(support, "Identify Directive",
+			    *field & 0x1 ? "Supported" : "Not supported");
+		obj_add_str(support, "Stream Directive",
+			    *field & 0x2 ? "Supported" : "Not supported");
+		obj_add_str(support, "Data Placement Directive",
+			    *field & 0x4 ? "Supported" : "Not supported");
+		enabled = json_create_array();
+		obj_add_array(r, "Directive enabled", enabled);
+		obj_add_str(enabled, "Identify Directive",
+			    *(field + 32) & 0x1 ? "Enabled" : "Disabled");
+		obj_add_str(enabled, "Stream Directive",
+			    *(field + 32) & 0x2 ? "Enabled" : "Disabled");
+		obj_add_str(enabled, "Data Placement Directive",
+			    *(field + 32) & 0x4 ? "Enabled" : "Disabled");
+		persistent = json_create_array();
+		obj_add_array(r, "Directive Persistent Across Controller Level Resets",
+			      persistent);
+		obj_add_str(persistent, "Identify Directive",
+			    *(field + 64) & 0x1 ? "Enabled" : "Disabled");
+		obj_add_str(persistent, "Stream Directive",
+			    *(field + 64) & 0x2 ? "Enabled" : "Disabled");
+		obj_add_str(persistent, "Data Placement Directive",
+			    *(field + 64) & 0x4 ? "Enabled" : "Disabled");
+		break;
+	default:
+		obj_add_str(r, "Error", "invalid directive operations for Identify Directives");
+		break;
+	}
+}
+
+static void json_directive_show_fields_streams(__u8 doper,  unsigned int result, __u16 *field,
+					       struct json_object *r)
+{
+	int count;
+	int i;
+	char json_str[STR_LEN];
+
+	switch (doper) {
+	case NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_PARAM:
+		obj_add_uint(r, "Max Streams Limit (MSL)", le16_to_cpu(*field));
+		obj_add_uint(r, "NVM Subsystem Streams Available (NSSA)", le16_to_cpu(*(field + 2)));
+		obj_add_uint(r, "NVM Subsystem Streams Open (NSSO)", le16_to_cpu(*(field + 4)));
+		obj_add_uint(r, "NVM Subsystem Stream Capability (NSSC)", le16_to_cpu(*(field + 6)));
+		obj_add_uint(r, "Stream Write Size (in unit of LB size) (SWS)",
+			     le16_to_cpu(*(__u32 *)(field + 16)));
+		obj_add_uint(r, "Stream Granularity Size (in unit of SWS) (SGS)",
+			     le16_to_cpu(*(field + 20)));
+		obj_add_uint(r, "Namespace Streams Allocated (NSA)", le16_to_cpu(*(field + 22)));
+		obj_add_uint(r, "Namespace Streams Open (NSO)", le16_to_cpu(*(field + 24)));
+		break;
+	case NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_STATUS:
+		count = *field;
+		obj_add_uint(r, "Open Stream Count", le16_to_cpu(*field));
+		for (i = 0; i < count; i++) {
+			sprintf(json_str, "Stream Identifier %.6u", i + 1);
+			obj_add_uint(r, json_str, le16_to_cpu(*(field + (i + 1) * 2)));
+		}
+		break;
+	case NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_RESOURCE:
+		obj_add_uint(r, "Namespace Streams Allocated (NSA)", result & 0xffff);
+		break;
+	default:
+		obj_add_str(r, "Error",
+					     "invalid directive operations for Streams Directives");
+		break;
+	}
+}
+
+static void json_directive_show_fields(__u8 dtype, __u8 doper, unsigned int result,
+				       __u8 *field, struct json_object *r)
+{
+	switch (dtype) {
+	case NVME_DIRECTIVE_DTYPE_IDENTIFY:
+		json_directive_show_fields_identify(doper, field, r);
+		break;
+	case NVME_DIRECTIVE_DTYPE_STREAMS:
+		json_directive_show_fields_streams(doper, result, (__u16 *)field, r);
+		break;
+	default:
+		obj_add_str(r, "Error", "invalid directive type");
+		break;
+	}
+}
+
+static void json_directive_show(__u8 type, __u8 oper, __u16 spec, __u32 nsid, __u32 result,
+				void *buf, __u32 len)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *data;
+	char json_str[STR_LEN];
+
+	sprintf(json_str, "%#x", type);
+	obj_add_str(r, "Type", json_str);
+	sprintf(json_str, "%#x", oper);
+	obj_add_str(r, "Operation", json_str);
+	sprintf(json_str, "%#x", spec);
+	obj_add_str(r, "spec", json_str);
+	sprintf(json_str, "%#x", nsid);
+	obj_add_str(r, "NSID", json_str);
+	sprintf(json_str, "%#x", result);
+	obj_add_result(r, json_str);
+
+	if (json_print_ops.flags & VERBOSE) {
+		json_directive_show_fields(type, oper, result, buf, r);
+	} else if (buf) {
+		data = json_create_array();
+		d_json((unsigned char *)buf, len, 16, 1, data);
+		obj_add_array(r, "data", data);
+	}
+
+	json_print(r);
+}
+
+static void json_discovery_log(struct nvmf_discovery_log *log, int numrec)
+{
+	struct json_object *r = json_create_object();
+	struct json_object *entries = json_create_array();
+	int i;
+
+	obj_add_uint64(r, "genctr", le64_to_cpu(log->genctr));
+	obj_add_array(r, "records", entries);
+
+	for (i = 0; i < numrec; i++) {
+		struct nvmf_disc_log_entry *e = &log->entries[i];
+		struct json_object *entry = json_create_object();
+
+		obj_add_str(entry, "trtype", nvmf_trtype_str(e->trtype));
+		obj_add_str(entry, "adrfam", nvmf_adrfam_str(e->adrfam));
+		obj_add_str(entry, "subtype", nvmf_subtype_str(e->subtype));
+		obj_add_str(entry,"treq", nvmf_treq_str(e->treq));
+		obj_add_uint(entry, "portid", le16_to_cpu(e->portid));
+		obj_add_str(entry, "trsvcid", e->trsvcid);
+		obj_add_str(entry, "subnqn", e->subnqn);
+		obj_add_str(entry, "traddr", e->traddr);
+		obj_add_str(entry, "eflags", nvmf_eflags_str(le16_to_cpu(e->eflags)));
+
+		switch (e->trtype) {
+		case NVMF_TRTYPE_RDMA:
+			obj_add_str(entry, "rdma_prtype", nvmf_prtype_str(e->tsas.rdma.prtype));
+			obj_add_str(entry, "rdma_qptype", nvmf_qptype_str(e->tsas.rdma.qptype));
+			obj_add_str(entry, "rdma_cms", nvmf_cms_str(e->tsas.rdma.cms));
+			obj_add_uint(entry, "rdma_pkey", le16_to_cpu(e->tsas.rdma.pkey));
+			break;
+		case NVMF_TRTYPE_TCP:
+			obj_add_str(entry, "sectype", nvmf_sectype_str(e->tsas.tcp.sectype));
+			break;
+		default:
+			break;
+		}
+		array_add_obj(entries, entry);
+	}
+
+	json_print(r);
+}
+
+static void json_connect_msg(nvme_ctrl_t c)
+{
+	struct json_object *r = json_create_object();
+
+	obj_add_str(r, "device", nvme_ctrl_get_name(c));
+
+	json_print(r);
+}
+
+static void json_output_object(struct json_object *r)
+{
+	json_print(r);
+}
+
+static void json_output_status(int status)
+{
+	struct json_object *r;
+	char json_str[STR_LEN];
+	int val;
+	int type;
+
+	sprintf(json_str, "status: %d", status);
+	r = obj_create(json_str);
+
+	if (status < 0) {
+		obj_add_str(r, "error", nvme_strerror(errno));
+		json_print(r);
+		return;
+	}
+
+	val = nvme_status_get_value(status);
+	type = nvme_status_get_type(status);
+
+	switch (type) {
+	case NVME_STATUS_TYPE_NVME:
+		obj_add_str(r, "error", nvme_status_to_string(val, false));
+		obj_add_str(r, "type", "nvme");
+		break;
+	case NVME_STATUS_TYPE_MI:
+		obj_add_str(r, "error", nvme_mi_status_to_string(val));
+		obj_add_str(r, "type", "nvme-mi");
+		break;
+	default:
+		obj_add_str(r, "type", "Unknown");
+		break;
+	}
+
+	json_print(r);
+}
+
+static void json_output_error_status(int status, const char *msg, va_list ap)
+{
+	struct json_object *r;
+	char json_str[STR_LEN];
+	char *value;
+	int val;
+	int type;
+
+	if (vasprintf(&value, msg, ap) < 0)
+		value = NULL;
+
+	sprintf(json_str, "Error: %s", value ? value : "Could not allocate string");
+	r = obj_create(json_str);
+
+	free(value);
+
+	if (status < 0) {
+		obj_add_str(r, "error", nvme_strerror(errno));
+		json_print(r);
+		return;
+	}
+
+	val = nvme_status_get_value(status);
+	type = nvme_status_get_type(status);
+
+	switch (type) {
+	case NVME_STATUS_TYPE_NVME:
+		obj_add_str(r, "status", nvme_status_to_string(val, false));
+		obj_add_str(r, "type", "nvme");
+		break;
+	case NVME_STATUS_TYPE_MI:
+		obj_add_str(r, "status", nvme_mi_status_to_string(val));
+		obj_add_str(r, "type", "nvme-mi");
+		break;
+	default:
+		obj_add_str(r, "type", "Unknown");
+		break;
+	}
+
+	obj_add_int(r, "value", val);
+
+	json_print(r);
+}
+
+static void json_output_message(bool error, const char *msg, va_list ap)
+{
+	struct json_object *r = json_r ? json_r : json_create_object();
+	char *value;
+
+	if (vasprintf(&value, msg, ap) < 0)
+		value = NULL;
+
+	obj_add_str(r, error ? "error" : "result", value ? value : "Could not allocate string");
+
+	free(value);
+
+	json_print(r);
+}
+
+static void json_output_perror(const char *msg)
+{
+	struct json_object *r = json_create_object();
+	char *error;
+
+	if (asprintf(&error, "%s: %s", msg, strerror(errno)) < 0)
+		error = NULL;
+
+	if (error)
+		obj_add_str(r, "error", error);
+	else
+		obj_add_str(r, "error", "Could not allocate string");
+
+	json_output_object(r);
+
+	free(error);
+}
+
+void json_show_init(void)
+{
+	json_r = json_create_object();
+}
+
+void json_show_finish(void)
+{
+	if (json_r)
+		json_output_object(json_r);
+
+	json_r = NULL;
+}
+
+static struct print_ops json_print_ops = {
+	/* libnvme types.h print functions */
+	.ana_log			= json_ana_log,
+	.boot_part_log			= json_boot_part_log,
+	.phy_rx_eom_log			= json_phy_rx_eom_log,
+	.ctrl_list			= json_nvme_list_ctrl,
+	.ctrl_registers			= json_ctrl_registers,
+	.directive			= json_directive_show,
+	.discovery_log			= json_discovery_log,
+	.effects_log_list		= json_effects_log_list,
+	.endurance_group_event_agg_log	= json_endurance_group_event_agg_log,
+	.endurance_group_list		= json_nvme_endurance_group_list,
+	.endurance_log			= json_endurance_log,
+	.error_log			= json_error_log,
+	.fdp_config_log			= json_nvme_fdp_configs,
+	.fdp_event_log			= json_nvme_fdp_events,
+	.fdp_ruh_status			= json_nvme_fdp_ruh_status,
+	.fdp_stats_log			= json_nvme_fdp_stats,
+	.fdp_usage_log			= json_nvme_fdp_usage,
+	.fid_supported_effects_log	= json_fid_support_effects_log,
+	.fw_log				= json_fw_log,
+	.id_ctrl			= json_nvme_id_ctrl,
+	.id_ctrl_nvm			= json_nvme_id_ctrl_nvm,
+	.id_domain_list			= json_id_domain_list,
+	.id_independent_id_ns		= json_nvme_cmd_set_independent_id_ns,
+	.id_iocs			= json_id_iocs,
+	.id_ns				= json_nvme_id_ns,
+	.id_ns_descs			= json_nvme_id_ns_descs,
+	.id_ns_granularity_list		= json_nvme_id_ns_granularity_list,
+	.id_nvmset_list			= json_nvme_id_nvmset,
+	.id_uuid_list			= json_nvme_id_uuid_list,
+	.lba_status			= json_lba_status,
+	.lba_status_log			= json_lba_status_log,
+	.media_unit_stat_log		= json_media_unit_stat_log,
+	.mi_cmd_support_effects_log	= json_mi_cmd_support_effects_log,
+	.ns_list			= json_nvme_list_ns,
+	.ns_list_log			= json_changed_ns_list_log,
+	.nvm_id_ns			= json_nvme_nvm_id_ns,
+	.persistent_event_log		= json_persistent_event_log,
+	.predictable_latency_event_agg_log = json_predictable_latency_event_agg_log,
+	.predictable_latency_per_nvmset	= json_predictable_latency_per_nvmset,
+	.primary_ctrl_cap		= json_nvme_primary_ctrl_cap,
+	.resv_notification_log		= json_resv_notif_log,
+	.resv_report			= json_nvme_resv_report,
+	.sanitize_log_page		= json_sanitize_log,
+	.secondary_ctrl_list		= json_nvme_list_secondary_ctrl,
+	.select_result			= json_select_result,
+	.self_test_log 			= json_self_test_log,
+	.single_property		= json_single_property,
+	.smart_log			= json_smart_log,
+	.supported_cap_config_list_log	= json_supported_cap_config_log,
+	.supported_log_pages		= json_support_log,
+	.zns_start_zone_list		= json_zns_start_zone_list,
+	.zns_changed_zone_log		= json_zns_changed,
+	.zns_finish_zone_list		= json_zns_finish_zone_list,
+	.zns_id_ctrl			= json_nvme_zns_id_ctrl,
+	.zns_id_ns			= json_nvme_zns_id_ns,
+	.zns_report_zones		= json_nvme_zns_report_zones,
+	.show_feature			= json_feature_show,
+	.show_feature_fields		= json_feature_show_fields,
+	.id_ctrl_rpmbs			= json_id_ctrl_rpmbs,
+	.lba_range			= json_lba_range,
+	.lba_status_info		= json_lba_status_info,
+	.d				= json_d,
+	.show_init			= json_show_init,
+	.show_finish			= json_show_finish,
+
+	/* libnvme tree print functions */
+	.list_item			= json_list_item,
+	.list_items			= json_print_list_items,
+	.print_nvme_subsystem_list	= json_print_nvme_subsystem_list,
+	.topology_ctrl			= json_simple_topology,
+	.topology_namespace		= json_simple_topology,
+
+	/* status and error messages */
+	.connect_msg			= json_connect_msg,
+	.show_message			= json_output_message,
+	.show_perror			= json_output_perror,
+	.show_status			= json_output_status,
+	.show_error_status		= json_output_error_status,
+};
+
+struct print_ops *nvme_get_json_print_ops(enum nvme_print_flags flags)
+{
+	json_print_ops.flags = flags;
+	return &json_print_ops;
+}