Merging upstream version 2.4.

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

1 files changed, 2856 insertions, 0 deletions

diff --git a/nvme-print-json.c b/nvme-print-json.c
new file mode 100644
index 0000000..eb7e484
--- /dev/null
+++ b/nvme-print-json.c
@@ -0,0 +1,2856 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <assert.h>
+#include <errno.h>
+
+#include "nvme-print-json.h"
+
+#include "util/json.h"
+#include "nvme.h"
+#include "common.h"
+
+static const uint8_t zero_uuid[16] = { 0 };
+
+void json_nvme_id_ns(struct nvme_id_ns *ns, 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 *root;
+	struct json_object *lbafs;
+	int i;
+
+	nvme_uint128_t nvmcap = le128_to_cpu(ns->nvmcap);
+
+	root = json_create_object();
+
+	if (!cap_only) {
+		json_object_add_value_uint64(root, "nsze", le64_to_cpu(ns->nsze));
+		json_object_add_value_uint64(root, "ncap", le64_to_cpu(ns->ncap));
+		json_object_add_value_uint64(root, "nuse", le64_to_cpu(ns->nuse));
+		json_object_add_value_int(root, "nsfeat", ns->nsfeat);
+	}
+	json_object_add_value_int(root, "nlbaf", ns->nlbaf);
+	if (!cap_only)
+		json_object_add_value_int(root, "flbas", ns->flbas);
+	json_object_add_value_int(root, "mc", ns->mc);
+	json_object_add_value_int(root, "dpc", ns->dpc);
+	if (!cap_only) {
+		json_object_add_value_int(root, "dps", ns->dps);
+		json_object_add_value_int(root, "nmic", ns->nmic);
+		json_object_add_value_int(root, "rescap", ns->rescap);
+		json_object_add_value_int(root, "fpi", ns->fpi);
+		json_object_add_value_int(root, "dlfeat", ns->dlfeat);
+		json_object_add_value_int(root, "nawun", le16_to_cpu(ns->nawun));
+		json_object_add_value_int(root, "nawupf", le16_to_cpu(ns->nawupf));
+		json_object_add_value_int(root, "nacwu", le16_to_cpu(ns->nacwu));
+		json_object_add_value_int(root, "nabsn", le16_to_cpu(ns->nabsn));
+		json_object_add_value_int(root, "nabo", le16_to_cpu(ns->nabo));
+		json_object_add_value_int(root, "nabspf", le16_to_cpu(ns->nabspf));
+		json_object_add_value_int(root, "noiob", le16_to_cpu(ns->noiob));
+		json_object_add_value_uint128(root, "nvmcap", nvmcap);
+		json_object_add_value_int(root, "nsattr", ns->nsattr);
+		json_object_add_value_int(root, "nvmsetid", le16_to_cpu(ns->nvmsetid));
+
+		if (ns->nsfeat & 0x10) {
+			json_object_add_value_int(root, "npwg", le16_to_cpu(ns->npwg));
+			json_object_add_value_int(root, "npwa", le16_to_cpu(ns->npwa));
+			json_object_add_value_int(root, "npdg", le16_to_cpu(ns->npdg));
+			json_object_add_value_int(root, "npda", le16_to_cpu(ns->npda));
+			json_object_add_value_int(root, "nows", le16_to_cpu(ns->nows));
+		}
+
+		json_object_add_value_int(root, "mssrl", le16_to_cpu(ns->mssrl));
+		json_object_add_value_uint(root, "mcl", le32_to_cpu(ns->mcl));
+		json_object_add_value_int(root, "msrc", ns->msrc);
+	}
+	json_object_add_value_int(root, "nulbaf", ns->nulbaf);
+
+	if (!cap_only) {
+		json_object_add_value_uint(root, "anagrpid", le32_to_cpu(ns->anagrpid));
+		json_object_add_value_int(root, "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]);
+
+		json_object_add_value_string(root, "eui64", eui64_buf);
+		json_object_add_value_string(root, "nguid", nguid_buf);
+	}
+
+	lbafs = json_create_array();
+	json_object_add_value_array(root, "lbafs", lbafs);
+
+	for (i = 0; i <= ns->nlbaf; i++) {
+		struct json_object *lbaf = json_create_object();
+
+		json_object_add_value_int(lbaf, "ms",
+			le16_to_cpu(ns->lbaf[i].ms));
+		json_object_add_value_int(lbaf, "ds", ns->lbaf[i].ds);
+		json_object_add_value_int(lbaf, "rp", ns->lbaf[i].rp);
+
+		json_array_add_value_object(lbafs, lbaf);
+	}
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+ void json_nvme_id_ctrl(struct nvme_id_ctrl *ctrl,
+			void (*vs)(__u8 *vs, struct json_object *root))
+{
+	struct json_object *root;
+	struct json_object *psds;
+
+	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);
+
+	root = json_create_object();
+
+	json_object_add_value_int(root, "vid", le16_to_cpu(ctrl->vid));
+	json_object_add_value_int(root, "ssvid", le16_to_cpu(ctrl->ssvid));
+	json_object_add_value_string(root, "sn", sn);
+	json_object_add_value_string(root, "mn", mn);
+	json_object_add_value_string(root, "fr", fr);
+	json_object_add_value_int(root, "rab", ctrl->rab);
+	json_object_add_value_int(root, "ieee", ieee);
+	json_object_add_value_int(root, "cmic", ctrl->cmic);
+	json_object_add_value_int(root, "mdts", ctrl->mdts);
+	json_object_add_value_int(root, "cntlid", le16_to_cpu(ctrl->cntlid));
+	json_object_add_value_uint(root, "ver", le32_to_cpu(ctrl->ver));
+	json_object_add_value_uint(root, "rtd3r", le32_to_cpu(ctrl->rtd3r));
+	json_object_add_value_uint(root, "rtd3e", le32_to_cpu(ctrl->rtd3e));
+	json_object_add_value_uint(root, "oaes", le32_to_cpu(ctrl->oaes));
+	json_object_add_value_uint(root, "ctratt", le32_to_cpu(ctrl->ctratt));
+	json_object_add_value_int(root, "rrls", le16_to_cpu(ctrl->rrls));
+	json_object_add_value_int(root, "cntrltype", ctrl->cntrltype);
+	json_object_add_value_string(root, "fguid", util_uuid_to_string(ctrl->fguid));
+	json_object_add_value_int(root, "crdt1", le16_to_cpu(ctrl->crdt1));
+	json_object_add_value_int(root, "crdt2", le16_to_cpu(ctrl->crdt2));
+	json_object_add_value_int(root, "crdt3", le16_to_cpu(ctrl->crdt3));
+	json_object_add_value_int(root, "nvmsr", ctrl->nvmsr);
+	json_object_add_value_int(root, "vwci", ctrl->vwci);
+	json_object_add_value_int(root, "mec", ctrl->mec);
+	json_object_add_value_int(root, "oacs", le16_to_cpu(ctrl->oacs));
+	json_object_add_value_int(root, "acl", ctrl->acl);
+	json_object_add_value_int(root, "aerl", ctrl->aerl);
+	json_object_add_value_int(root, "frmw", ctrl->frmw);
+	json_object_add_value_int(root, "lpa", ctrl->lpa);
+	json_object_add_value_int(root, "elpe", ctrl->elpe);
+	json_object_add_value_int(root, "npss", ctrl->npss);
+	json_object_add_value_int(root, "avscc", ctrl->avscc);
+	json_object_add_value_int(root, "apsta", ctrl->apsta);
+	json_object_add_value_int(root, "wctemp", le16_to_cpu(ctrl->wctemp));
+	json_object_add_value_int(root, "cctemp", le16_to_cpu(ctrl->cctemp));
+	json_object_add_value_int(root, "mtfa", le16_to_cpu(ctrl->mtfa));
+	json_object_add_value_uint(root, "hmpre", le32_to_cpu(ctrl->hmpre));
+	json_object_add_value_uint(root, "hmmin", le32_to_cpu(ctrl->hmmin));
+	json_object_add_value_uint128(root, "tnvmcap", tnvmcap);
+	json_object_add_value_uint128(root, "unvmcap", unvmcap);
+	json_object_add_value_uint(root, "rpmbs", le32_to_cpu(ctrl->rpmbs));
+	json_object_add_value_int(root, "edstt", le16_to_cpu(ctrl->edstt));
+	json_object_add_value_int(root, "dsto", ctrl->dsto);
+	json_object_add_value_int(root, "fwug", ctrl->fwug);
+	json_object_add_value_int(root, "kas", le16_to_cpu(ctrl->kas));
+	json_object_add_value_int(root, "hctma", le16_to_cpu(ctrl->hctma));
+	json_object_add_value_int(root, "mntmt", le16_to_cpu(ctrl->mntmt));
+	json_object_add_value_int(root, "mxtmt", le16_to_cpu(ctrl->mxtmt));
+	json_object_add_value_uint(root, "sanicap", le32_to_cpu(ctrl->sanicap));
+	json_object_add_value_uint(root, "hmminds", le32_to_cpu(ctrl->hmminds));
+	json_object_add_value_int(root, "hmmaxd", le16_to_cpu(ctrl->hmmaxd));
+	json_object_add_value_int(root, "nsetidmax",
+		le16_to_cpu(ctrl->nsetidmax));
+	json_object_add_value_int(root, "endgidmax", le16_to_cpu(ctrl->endgidmax));
+	json_object_add_value_int(root, "anatt",ctrl->anatt);
+	json_object_add_value_int(root, "anacap", ctrl->anacap);
+	json_object_add_value_uint(root, "anagrpmax",
+		le32_to_cpu(ctrl->anagrpmax));
+	json_object_add_value_uint(root, "nanagrpid",
+		le32_to_cpu(ctrl->nanagrpid));
+	json_object_add_value_uint(root, "pels", le32_to_cpu(ctrl->pels));
+	json_object_add_value_int(root, "domainid", le16_to_cpu(ctrl->domainid));
+	json_object_add_value_uint128(root, "megcap", megcap);
+	json_object_add_value_int(root, "sqes", ctrl->sqes);
+	json_object_add_value_int(root, "cqes", ctrl->cqes);
+	json_object_add_value_int(root, "maxcmd", le16_to_cpu(ctrl->maxcmd));
+	json_object_add_value_uint(root, "nn", le32_to_cpu(ctrl->nn));
+	json_object_add_value_int(root, "oncs", le16_to_cpu(ctrl->oncs));
+	json_object_add_value_int(root, "fuses", le16_to_cpu(ctrl->fuses));
+	json_object_add_value_int(root, "fna", ctrl->fna);
+	json_object_add_value_int(root, "vwc", ctrl->vwc);
+	json_object_add_value_int(root, "awun", le16_to_cpu(ctrl->awun));
+	json_object_add_value_int(root, "awupf", le16_to_cpu(ctrl->awupf));
+	json_object_add_value_int(root, "icsvscc", ctrl->icsvscc);
+	json_object_add_value_int(root, "nwpc", ctrl->nwpc);
+	json_object_add_value_int(root, "acwu", le16_to_cpu(ctrl->acwu));
+	json_object_add_value_int(root, "ocfs", le16_to_cpu(ctrl->ocfs));
+	json_object_add_value_uint(root, "sgls", le32_to_cpu(ctrl->sgls));
+	json_object_add_value_uint(root, "mnan", le32_to_cpu(ctrl->mnan));
+	json_object_add_value_uint128(root, "maxdna", maxdna);
+	json_object_add_value_uint(root, "maxcna", le32_to_cpu(ctrl->maxcna));
+
+	if (strlen(subnqn))
+		json_object_add_value_string(root, "subnqn", subnqn);
+
+	json_object_add_value_uint(root, "ioccsz", le32_to_cpu(ctrl->ioccsz));
+	json_object_add_value_uint(root, "iorcsz", le32_to_cpu(ctrl->iorcsz));
+	json_object_add_value_int(root, "icdoff", le16_to_cpu(ctrl->icdoff));
+	json_object_add_value_int(root, "fcatt", ctrl->fcatt);
+	json_object_add_value_int(root, "msdbd", ctrl->msdbd);
+	json_object_add_value_int(root, "ofcs", le16_to_cpu(ctrl->ofcs));
+
+	psds = json_create_array();
+	json_object_add_value_array(root, "psds", psds);
+
+	for (i = 0; i <= ctrl->npss; i++) {
+		struct json_object *psd = json_create_object();
+
+		json_object_add_value_int(psd, "max_power",
+			le16_to_cpu(ctrl->psd[i].mp));
+		json_object_add_value_int(psd, "flags", ctrl->psd[i].flags);
+		json_object_add_value_uint(psd, "entry_lat",
+			le32_to_cpu(ctrl->psd[i].enlat));
+		json_object_add_value_uint(psd, "exit_lat",
+			le32_to_cpu(ctrl->psd[i].exlat));
+		json_object_add_value_int(psd, "read_tput",
+			ctrl->psd[i].rrt);
+		json_object_add_value_int(psd, "read_lat",
+			ctrl->psd[i].rrl);
+		json_object_add_value_int(psd, "write_tput",
+			ctrl->psd[i].rwt);
+		json_object_add_value_int(psd, "write_lat",
+			ctrl->psd[i].rwl);
+		json_object_add_value_int(psd, "idle_power",
+			le16_to_cpu(ctrl->psd[i].idlp));
+		json_object_add_value_int(psd, "idle_scale",
+			nvme_psd_power_scale(ctrl->psd[i].ips));
+		json_object_add_value_int(psd, "active_power",
+			le16_to_cpu(ctrl->psd[i].actp));
+		json_object_add_value_int(psd, "active_power_work",
+			ctrl->psd[i].apws & 0x7);
+		json_object_add_value_int(psd, "active_scale",
+			nvme_psd_power_scale(ctrl->psd[i].apws));
+
+		json_array_add_value_object(psds, psd);
+	}
+
+	if(vs)
+		vs(ctrl->vs, root);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_error_log(struct nvme_error_log_page *err_log, int entries)
+{
+	struct json_object *root;
+	struct json_object *errors;
+	int i;
+
+	root = json_create_object();
+	errors = json_create_array();
+	json_object_add_value_array(root, "errors", errors);
+
+	for (i = 0; i < entries; i++) {
+		struct json_object *error = json_create_object();
+
+		json_object_add_value_uint64(error, "error_count",
+			le64_to_cpu(err_log[i].error_count));
+		json_object_add_value_int(error, "sqid",
+			le16_to_cpu(err_log[i].sqid));
+		json_object_add_value_int(error, "cmdid",
+			le16_to_cpu(err_log[i].cmdid));
+		json_object_add_value_int(error, "status_field",
+			le16_to_cpu(err_log[i].status_field >> 0x1));
+		json_object_add_value_int(error, "phase_tag",
+			le16_to_cpu(err_log[i].status_field & 0x1));
+		json_object_add_value_int(error, "parm_error_location",
+			le16_to_cpu(err_log[i].parm_error_location));
+		json_object_add_value_uint64(error, "lba",
+			le64_to_cpu(err_log[i].lba));
+		json_object_add_value_uint(error, "nsid",
+			le32_to_cpu(err_log[i].nsid));
+		json_object_add_value_int(error, "vs", err_log[i].vs);
+		json_object_add_value_int(error, "trtype", err_log[i].trtype);
+		json_object_add_value_uint64(error, "cs",
+			le64_to_cpu(err_log[i].cs));
+		json_object_add_value_int(error, "trtype_spec_info",
+			le16_to_cpu(err_log[i].trtype_spec_info));
+
+		json_array_add_value_object(errors, error);
+	}
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_resv_report(struct nvme_resv_status *status,
+			   int bytes, bool eds)
+{
+	struct json_object *root;
+	struct json_object *rcs;
+	int i, j, regctl, entries;
+
+	regctl = status->regctl[0] | (status->regctl[1] << 8);
+
+	root = json_create_object();
+
+	json_object_add_value_uint(root, "gen", le32_to_cpu(status->gen));
+	json_object_add_value_int(root, "rtype", status->rtype);
+	json_object_add_value_int(root, "regctl", regctl);
+	json_object_add_value_int(root, "ptpls", status->ptpls);
+
+	rcs = json_create_array();
+	/* 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;
+
+		json_object_add_value_array(root, "regctls", rcs);
+		for (i = 0; i < regctl; i++) {
+			struct json_object *rc = json_create_object();
+
+			json_object_add_value_int(rc, "cntlid",
+				le16_to_cpu(status->regctl_ds[i].cntlid));
+			json_object_add_value_int(rc, "rcsts",
+				status->regctl_ds[i].rcsts);
+			json_object_add_value_uint64(rc, "hostid",
+				le64_to_cpu(status->regctl_ds[i].hostid));
+			json_object_add_value_uint64(rc, "rkey",
+				le64_to_cpu(status->regctl_ds[i].rkey));
+
+			json_array_add_value_object(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;
+
+		json_object_add_value_array(root, "regctlext", rcs);
+		for (i = 0; i < regctl; i++) {
+			struct json_object *rc = json_create_object();
+
+			json_object_add_value_int(rc, "cntlid",
+				le16_to_cpu(status->regctl_eds[i].cntlid));
+			json_object_add_value_int(rc, "rcsts",
+				status->regctl_eds[i].rcsts);
+			json_object_add_value_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]);
+
+			json_object_add_value_string(rc, "hostid", hostid);
+			json_array_add_value_object(rcs, rc);
+		}
+	}
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_fw_log(struct nvme_firmware_slot *fw_log, const char *devname)
+{
+	struct json_object *root;
+	struct json_object *fwsi;
+	char fmt[21];
+	char str[32];
+	int i;
+	__le64 *frs;
+
+	root = json_create_object();
+	fwsi = json_create_object();
+
+	json_object_add_value_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]));
+			json_object_add_value_string(fwsi, fmt, str);
+		}
+	}
+	json_object_add_value_object(root, devname, fwsi);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_changed_ns_list_log(struct nvme_ns_list *log,
+			      const char *devname)
+{
+	struct json_object *root;
+	struct json_object *nsi;
+	char fmt[32];
+	char str[32];
+	__u32 nsid;
+	int i;
+
+	if (log->ns[0] == cpu_to_le32(0xffffffff))
+		return;
+
+	root = json_create_object();
+	nsi = json_create_object();
+
+	json_object_add_value_string(root, "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);
+		json_object_add_value_string(nsi, fmt, str);
+	}
+
+	json_object_add_value_object(root, devname, nsi);
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_endurance_log(struct nvme_endurance_group_log *endurance_group,
+			__u16 group_id)
+{
+	struct json_object *root;
+
+	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);
+
+	root = json_create_object();
+
+	json_object_add_value_int(root, "critical_warning",
+		endurance_group->critical_warning);
+	json_object_add_value_int(root, "avl_spare",
+		endurance_group->avl_spare);
+	json_object_add_value_int(root, "avl_spare_threshold",
+		endurance_group->avl_spare_threshold);
+	json_object_add_value_int(root, "percent_used",
+		endurance_group->percent_used);
+	json_object_add_value_uint128(root, "endurance_estimate",
+		endurance_estimate);
+	json_object_add_value_uint128(root, "data_units_read", data_units_read);
+	json_object_add_value_uint128(root, "data_units_written",
+		data_units_written);
+	json_object_add_value_uint128(root, "media_units_written",
+		media_units_written);
+	json_object_add_value_uint128(root, "host_read_cmds", host_read_cmds);
+	json_object_add_value_uint128(root, "host_write_cmds", host_write_cmds);
+	json_object_add_value_uint128(root, "media_data_integrity_err",
+		media_data_integrity_err);
+	json_object_add_value_uint128(root, "num_err_info_log_entries",
+		num_err_info_log_entries);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_smart_log(struct nvme_smart_log *smart, unsigned int nsid,
+	enum nvme_print_flags flags)
+{
+	int c, human = flags & VERBOSE;
+	struct json_object *root;
+	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);
+
+	root = json_create_object();
+
+	if (human) {
+		struct json_object *crt = json_create_object();
+
+		json_object_add_value_int(crt, "value", smart->critical_warning);
+		json_object_add_value_int(crt, "available_spare", smart->critical_warning & 0x01);
+		json_object_add_value_int(crt, "temp_threshold", (smart->critical_warning & 0x02) >> 1);
+		json_object_add_value_int(crt, "reliability_degraded", (smart->critical_warning & 0x04) >> 2);
+		json_object_add_value_int(crt, "ro", (smart->critical_warning & 0x08) >> 3);
+		json_object_add_value_int(crt, "vmbu_failed", (smart->critical_warning & 0x10) >> 4);
+		json_object_add_value_int(crt, "pmr_ro", (smart->critical_warning & 0x20) >> 5);
+
+		json_object_add_value_object(root, "critical_warning", crt);
+	} else
+		json_object_add_value_int(root, "critical_warning",
+			smart->critical_warning);
+
+	json_object_add_value_int(root, "temperature", temperature);
+	json_object_add_value_int(root, "avail_spare", smart->avail_spare);
+	json_object_add_value_int(root, "spare_thresh", smart->spare_thresh);
+	json_object_add_value_int(root, "percent_used", smart->percent_used);
+	json_object_add_value_int(root, "endurance_grp_critical_warning_summary",
+		smart->endu_grp_crit_warn_sumry);
+	json_object_add_value_uint128(root, "data_units_read", data_units_read);
+	json_object_add_value_uint128(root, "data_units_written",
+		data_units_written);
+	json_object_add_value_uint128(root, "host_read_commands",
+		host_read_commands);
+	json_object_add_value_uint128(root, "host_write_commands",
+		host_write_commands);
+	json_object_add_value_uint128(root, "controller_busy_time",
+		controller_busy_time);
+	json_object_add_value_uint128(root, "power_cycles", power_cycles);
+	json_object_add_value_uint128(root, "power_on_hours", power_on_hours);
+	json_object_add_value_uint128(root, "unsafe_shutdowns", unsafe_shutdowns);
+	json_object_add_value_uint128(root, "media_errors", media_errors);
+	json_object_add_value_uint128(root, "num_err_log_entries",
+		num_err_log_entries);
+	json_object_add_value_uint(root, "warning_temp_time",
+			le32_to_cpu(smart->warning_temp_time));
+	json_object_add_value_uint(root, "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);
+		json_object_add_value_int(root, key, temp);
+	}
+
+	json_object_add_value_uint(root, "thm_temp1_trans_count",
+			le32_to_cpu(smart->thm_temp1_trans_count));
+	json_object_add_value_uint(root, "thm_temp2_trans_count",
+			le32_to_cpu(smart->thm_temp2_trans_count));
+	json_object_add_value_uint(root, "thm_temp1_total_time",
+			le32_to_cpu(smart->thm_temp1_total_time));
+	json_object_add_value_uint(root, "thm_temp2_total_time",
+			le32_to_cpu(smart->thm_temp2_total_time));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_ana_log(struct nvme_ana_log *ana_log, const char *devname)
+{
+	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;
+	struct json_object *ns_list;
+	struct json_object *desc;
+	struct json_object *nsid;
+	struct json_object *root;
+	size_t nsid_buf_size;
+	void *base = ana_log;
+	__u32 nr_nsids;
+	int i, j;
+
+	root = json_create_object();
+	json_object_add_value_string(root,
+			"Asymmetric Namespace Access Log for NVMe device",
+			devname);
+	json_object_add_value_uint64(root, "chgcnt",
+			le64_to_cpu(hdr->chgcnt));
+	json_object_add_value_uint(root, "ngrps", le16_to_cpu(hdr->ngrps));
+
+	desc_list = json_create_array();
+	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);
+		json_object_add_value_uint(desc, "grpid",
+				le32_to_cpu(ana_desc->grpid));
+		json_object_add_value_uint(desc, "nnsids",
+				le32_to_cpu(ana_desc->nnsids));
+		json_object_add_value_uint(desc, "chgcnt",
+				le64_to_cpu(ana_desc->chgcnt));
+		json_object_add_value_string(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();
+			json_object_add_value_uint(nsid, "nsid",
+					le32_to_cpu(ana_desc->nsids[j]));
+			json_array_add_value_object(ns_list, nsid);
+		}
+		json_object_add_value_array(desc, "NSIDS", ns_list);
+		offset += nsid_buf_size;
+		json_array_add_value_object(desc_list, desc);
+	}
+
+	json_object_add_value_array(root, "ANA DESC LIST ", desc_list);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_self_test_log(struct nvme_self_test_log *self_test, __u8 dst_entries)
+{
+	struct json_object *valid_attrs;
+	struct json_object *root;
+	struct json_object *valid;
+	int i;
+	__u32 num_entries;
+
+	root = json_create_object();
+	json_object_add_value_int(root, "Current Device Self-Test Operation",
+		self_test->current_operation);
+	json_object_add_value_int(root, "Current Device Self-Test Completion",
+		self_test->completion);
+	valid = json_create_array();
+
+	num_entries = min(dst_entries, NVME_LOG_ST_MAX_RESULTS);
+	for (i = 0; i < num_entries; i++) {
+		valid_attrs = json_create_object();
+		json_object_add_value_int(valid_attrs, "Self test result",
+			self_test->result[i].dsts & 0xf);
+		if ((self_test->result[i].dsts & 0xf) == 0xf)
+			goto add;
+		json_object_add_value_int(valid_attrs, "Self test code",
+			self_test->result[i].dsts >> 4);
+		json_object_add_value_int(valid_attrs, "Segment number",
+			self_test->result[i].seg);
+		json_object_add_value_int(valid_attrs, "Valid Diagnostic Information",
+			self_test->result[i].vdi);
+		json_object_add_value_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)
+			json_object_add_value_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) {
+			json_object_add_value_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)
+			json_object_add_value_int(valid_attrs, "Status Code Type",
+				self_test->result[i].sct);
+		if (self_test->result[i].vdi & NVME_ST_VALID_DIAG_INFO_SC)
+			json_object_add_value_int(valid_attrs, "Status Code",
+				self_test->result[i].sc);
+		json_object_add_value_int(valid_attrs, "Vendor Specific",
+			(self_test->result[i].vs[1] << 8) |
+			(self_test->result[i].vs[0]));
+add:
+		json_array_add_value_object(valid, valid_attrs);
+	}
+	json_object_add_value_array(root, "List of Valid Reports", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+struct json_object* json_effects_log(enum nvme_csi csi,
+			     struct nvme_cmd_effects_log *effects_log)
+{
+	struct json_object *root;
+	struct json_object *acs;
+	struct json_object *iocs;
+	unsigned int opcode;
+	char key[128];
+	__u32 effect;
+
+	root = json_create_object();
+	json_object_add_value_uint(root, "command_set_identifier", csi);
+
+	acs = json_create_object();
+	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));
+			json_object_add_value_uint(acs, key, effect);
+		}
+	}
+
+	json_object_add_value_object(root, "admin_cmd_set", acs);
+
+	iocs = json_create_object();
+	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));
+			json_object_add_value_uint(iocs, key, effect);
+		}
+	}
+
+	json_object_add_value_object(root, "io_cmd_set", iocs);
+	return root;
+}
+
+void json_effects_log_list(struct list_head *list)
+{
+	struct json_object *json_list;
+	nvme_effects_log_node_t *node;
+
+	json_list = json_create_array();
+
+	list_for_each(list, node, node) {
+		struct json_object *json_page =
+			json_effects_log(node->csi, &node->effects);
+		json_array_add_value_object(json_list, json_page);
+	}
+
+	json_print_object(json_list, NULL);
+	printf("\n");
+	json_free_object(json_list);
+}
+
+void json_sanitize_log(struct nvme_sanitize_log_page *sanitize_log,
+			      const char *devname)
+{
+	struct json_object *root;
+	struct json_object *dev;
+	struct json_object *sstat;
+	const char *status_str;
+	char str[128];
+	__u16 status = le16_to_cpu(sanitize_log->sstat);
+
+	root = json_create_object();
+	dev = json_create_object();
+	sstat = json_create_object();
+
+	json_object_add_value_int(dev, "sprog",
+		le16_to_cpu(sanitize_log->sprog));
+	json_object_add_value_int(sstat, "global_erased",
+		(status & NVME_SANITIZE_SSTAT_GLOBAL_DATA_ERASED) >> 8);
+	json_object_add_value_int(sstat, "no_cmplted_passes",
+		(status >> NVME_SANITIZE_SSTAT_COMPLETED_PASSES_SHIFT) &
+			NVME_SANITIZE_SSTAT_COMPLETED_PASSES_MASK);
+
+	status_str = get_sanitize_log_sstat_status_str(status);
+	sprintf(str, "(%d) %s", status & NVME_SANITIZE_SSTAT_STATUS_MASK,
+		status_str);
+	json_object_add_value_string(sstat, "status", str);
+
+	json_object_add_value_object(dev, "sstat", sstat);
+	json_object_add_value_uint(dev, "cdw10_info",
+		le32_to_cpu(sanitize_log->scdw10));
+	json_object_add_value_uint(dev, "time_over_write",
+		le32_to_cpu(sanitize_log->eto));
+	json_object_add_value_uint(dev, "time_block_erase",
+		le32_to_cpu(sanitize_log->etbe));
+	json_object_add_value_uint(dev, "time_crypto_erase",
+		le32_to_cpu(sanitize_log->etce));
+
+	json_object_add_value_uint(dev, "time_over_write_no_dealloc",
+		le32_to_cpu(sanitize_log->etond));
+	json_object_add_value_uint(dev, "time_block_erase_no_dealloc",
+		le32_to_cpu(sanitize_log->etbend));
+	json_object_add_value_uint(dev, "time_crypto_erase_no_dealloc",
+		le32_to_cpu(sanitize_log->etcend));
+
+	json_object_add_value_object(root, devname, dev);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_predictable_latency_per_nvmset(
+	struct nvme_nvmset_predictable_lat_log *plpns_log,
+	__u16 nvmset_id)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+	json_object_add_value_uint(root, "nvmset_id",
+		le16_to_cpu(nvmset_id));
+	json_object_add_value_uint(root, "status",
+		plpns_log->status);
+	json_object_add_value_uint(root, "event_type",
+		le16_to_cpu(plpns_log->event_type));
+	json_object_add_value_uint64(root, "dtwin_reads_typical",
+		le64_to_cpu(plpns_log->dtwin_rt));
+	json_object_add_value_uint64(root, "dtwin_writes_typical",
+		le64_to_cpu(plpns_log->dtwin_wt));
+	json_object_add_value_uint64(root, "dtwin_time_maximum",
+		le64_to_cpu(plpns_log->dtwin_tmax));
+	json_object_add_value_uint64(root, "ndwin_time_minimum_high",
+		le64_to_cpu(plpns_log->ndwin_tmin_hi));
+	json_object_add_value_uint64(root, "ndwin_time_minimum_low",
+		le64_to_cpu(plpns_log->ndwin_tmin_lo));
+	json_object_add_value_uint64(root, "dtwin_reads_estimate",
+		le64_to_cpu(plpns_log->dtwin_re));
+	json_object_add_value_uint64(root, "dtwin_writes_estimate",
+		le64_to_cpu(plpns_log->dtwin_we));
+	json_object_add_value_uint64(root, "dtwin_time_estimate",
+		le64_to_cpu(plpns_log->dtwin_te));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_predictable_latency_event_agg_log(
+	struct nvme_aggregate_predictable_lat_event *pea_log,
+	__u64 log_entries)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+	__u64 num_iter;
+	__u64 num_entries;
+
+	root = json_create_object();
+	num_entries = le64_to_cpu(pea_log->num_entries);
+	json_object_add_value_uint64(root, "num_entries_avail",
+		num_entries);
+	valid = json_create_array();
+
+	num_iter = min(num_entries, log_entries);
+	for (int i = 0; i < num_iter; i++) {
+		valid_attrs = json_create_object();
+		json_object_add_value_uint(valid_attrs, "entry",
+			le16_to_cpu(pea_log->entries[i]));
+		json_array_add_value_object(valid, valid_attrs);
+	}
+	json_object_add_value_array(root, "list_of_entries", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void add_bitmap(int i, __u8 seb, struct json_object *root, int json_flag)
+{
+	char evt_str[50];
+	char key[128];
+
+	for (int bit = 0; bit < 8; bit++) {
+		if (nvme_pel_event_to_string(bit + i * 8)) {
+			if (json_flag == 1) {
+				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));
+				json_object_add_value_string(root, key, evt_str);
+			} else {
+				if (nvme_pel_event_to_string(bit + i * 8))
+					if ((seb >> bit) & 0x1)
+						printf("	Support %s\n",
+							nvme_pel_event_to_string(bit + i * 8));
+			}
+		}
+	}
+}
+
+void json_persistent_event_log(void *pevent_log_info, __u32 size)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+	__u32 offset, por_info_len, por_info_list;
+	__u64 *fw_rev;
+	char key[128];
+	char fw_str[50];
+
+	struct nvme_smart_log *smart_event;
+	struct nvme_fw_commit_event *fw_commit_event;
+	struct nvme_time_stamp_change_event *ts_change_event;
+	struct nvme_power_on_reset_info_list *por_event;
+	struct nvme_nss_hw_err_event *nss_hw_err_event;
+	struct nvme_change_ns_event *ns_event;
+	struct nvme_format_nvm_start_event *format_start_event;
+	struct nvme_format_nvm_compln_event *format_cmpln_event;
+	struct nvme_sanitize_start_event *sanitize_start_event;
+	struct nvme_sanitize_compln_event *sanitize_cmpln_event;
+	struct nvme_thermal_exc_event *thermal_exc_event;
+	struct nvme_persistent_event_log *pevent_log_head;
+	struct nvme_persistent_event_entry *pevent_entry_head;
+
+	root = json_create_object();
+	valid = json_create_array();
+
+	offset = sizeof(*pevent_log_head);
+	if (size >= offset) {
+		pevent_log_head = pevent_log_info;
+		char sn[sizeof(pevent_log_head->sn) + 1],
+			mn[sizeof(pevent_log_head->mn) + 1],
+			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);
+
+		json_object_add_value_uint(root, "log_id",
+			pevent_log_head->lid);
+		json_object_add_value_uint(root, "total_num_of_events",
+			le32_to_cpu(pevent_log_head->tnev));
+		json_object_add_value_uint64(root, "total_log_len",
+			le64_to_cpu(pevent_log_head->tll));
+		json_object_add_value_uint(root, "log_revision",
+			pevent_log_head->rv);
+		json_object_add_value_uint(root, "log_header_len",
+			le16_to_cpu(pevent_log_head->lhl));
+		json_object_add_value_uint64(root, "timestamp",
+			le64_to_cpu(pevent_log_head->ts));
+		json_object_add_value_uint128(root, "power_on_hours",
+			le128_to_cpu(pevent_log_head->poh));
+		json_object_add_value_uint64(root, "power_cycle_count",
+			le64_to_cpu(pevent_log_head->pcc));
+		json_object_add_value_uint(root, "pci_vid",
+			le16_to_cpu(pevent_log_head->vid));
+		json_object_add_value_uint(root, "pci_ssvid",
+			le16_to_cpu(pevent_log_head->ssvid));
+		json_object_add_value_string(root, "sn", sn);
+		json_object_add_value_string(root, "mn", mn);
+		json_object_add_value_string(root, "subnqn", subnqn);
+		json_object_add_value_uint(root, "gen_number",
+			le16_to_cpu(pevent_log_head->gen_number));
+		json_object_add_value_uint(root, "rci",
+			le32_to_cpu(pevent_log_head->rci));
+		for (int i = 0; i < 32; i++) {
+			if (pevent_log_head->seb[i] == 0)
+				continue;
+			add_bitmap(i, pevent_log_head->seb[i], root, 1);
+		}
+	} else {
+		printf("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\n");
+		return;
+	}
+	for (int 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();
+
+		json_object_add_value_uint(valid_attrs, "event_number", i);
+		json_object_add_value_string(valid_attrs, "event_type",
+			nvme_pel_event_to_string(pevent_entry_head->etype));
+		json_object_add_value_uint(valid_attrs, "event_type_rev",
+			pevent_entry_head->etype_rev);
+		json_object_add_value_uint(valid_attrs, "event_header_len",
+			pevent_entry_head->ehl);
+		json_object_add_value_uint(valid_attrs, "event_header_additional_info",
+			pevent_entry_head->ehai);
+		json_object_add_value_uint(valid_attrs, "ctrl_id",
+			le16_to_cpu(pevent_entry_head->cntlid));
+		json_object_add_value_uint64(valid_attrs, "event_time_stamp",
+			le64_to_cpu(pevent_entry_head->ets));
+		json_object_add_value_uint(valid_attrs, "port_id",
+			le16_to_cpu(pevent_entry_head->pelpid));
+		json_object_add_value_uint(valid_attrs, "vu_info_len",
+			le16_to_cpu(pevent_entry_head->vsil));
+		json_object_add_value_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:
+			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);
+			json_object_add_value_int(valid_attrs, "critical_warning",
+				smart_event->critical_warning);
+
+			json_object_add_value_int(valid_attrs, "temperature",
+				temperature);
+			json_object_add_value_int(valid_attrs, "avail_spare",
+				smart_event->avail_spare);
+			json_object_add_value_int(valid_attrs, "spare_thresh",
+				smart_event->spare_thresh);
+			json_object_add_value_int(valid_attrs, "percent_used",
+				smart_event->percent_used);
+			json_object_add_value_int(valid_attrs,
+				"endurance_grp_critical_warning_summary",
+				smart_event->endu_grp_crit_warn_sumry);
+			json_object_add_value_uint128(valid_attrs, "data_units_read",
+				data_units_read);
+			json_object_add_value_uint128(valid_attrs, "data_units_written",
+				data_units_written);
+			json_object_add_value_uint128(valid_attrs, "host_read_commands",
+				host_read_commands);
+			json_object_add_value_uint128(valid_attrs, "host_write_commands",
+				host_write_commands);
+			json_object_add_value_uint128(valid_attrs, "controller_busy_time",
+				controller_busy_time);
+			json_object_add_value_uint128(valid_attrs, "power_cycles",
+				power_cycles);
+			json_object_add_value_uint128(valid_attrs, "power_on_hours",
+				power_on_hours);
+			json_object_add_value_uint128(valid_attrs, "unsafe_shutdowns",
+				unsafe_shutdowns);
+			json_object_add_value_uint128(valid_attrs, "media_errors",
+				media_errors);
+			json_object_add_value_uint128(valid_attrs, "num_err_log_entries",
+				num_err_log_entries);
+			json_object_add_value_uint(valid_attrs, "warning_temp_time",
+					le32_to_cpu(smart_event->warning_temp_time));
+			json_object_add_value_uint(valid_attrs, "critical_comp_time",
+					le32_to_cpu(smart_event->critical_comp_time));
+
+			for (int c = 0; c < 8; c++) {
+				__s32 temp = le16_to_cpu(smart_event->temp_sensor[c]);
+				if (temp == 0)
+					continue;
+				sprintf(key, "temperature_sensor_%d",c + 1);
+				json_object_add_value_int(valid_attrs, key, temp);
+			}
+
+			json_object_add_value_uint(valid_attrs, "thm_temp1_trans_count",
+					le32_to_cpu(smart_event->thm_temp1_trans_count));
+			json_object_add_value_uint(valid_attrs, "thm_temp2_trans_count",
+					le32_to_cpu(smart_event->thm_temp2_trans_count));
+			json_object_add_value_uint(valid_attrs, "thm_temp1_total_time",
+					le32_to_cpu(smart_event->thm_temp1_total_time));
+			json_object_add_value_uint(valid_attrs, "thm_temp2_total_time",
+					le32_to_cpu(smart_event->thm_temp2_total_time));
+			break;
+		case NVME_PEL_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));
+			json_object_add_value_string(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));
+			json_object_add_value_string(valid_attrs, "new_fw_rev", fw_str);
+			json_object_add_value_uint(valid_attrs, "fw_commit_action",
+				fw_commit_event->fw_commit_action);
+			json_object_add_value_uint(valid_attrs, "fw_slot",
+				fw_commit_event->fw_slot);
+			json_object_add_value_uint(valid_attrs, "sct_fw",
+				fw_commit_event->sct_fw);
+			json_object_add_value_uint(valid_attrs, "sc_fw",
+				fw_commit_event->sc_fw);
+			json_object_add_value_uint(valid_attrs,
+				"vu_assign_fw_commit_rc",
+				le16_to_cpu(fw_commit_event->vndr_assign_fw_commit_rc));
+			break;
+		case NVME_PEL_TIMESTAMP_EVENT:
+			ts_change_event = pevent_log_info + offset;
+			json_object_add_value_uint64(valid_attrs, "prev_ts",
+				le64_to_cpu(ts_change_event->previous_timestamp));
+			json_object_add_value_uint64(valid_attrs,
+				"ml_secs_since_reset",
+				le64_to_cpu(ts_change_event->ml_secs_since_reset));
+			break;
+		case NVME_PEL_POWER_ON_RESET_EVENT:
+			por_info_len = (le16_to_cpu(pevent_entry_head->el) -
+				le16_to_cpu(pevent_entry_head->vsil) - sizeof(*fw_rev));
+
+			por_info_list = por_info_len / sizeof(*por_event);
+
+			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));
+			json_object_add_value_string(valid_attrs, "fw_rev", fw_str);
+			for (int i = 0; i < por_info_list; i++) {
+				por_event = pevent_log_info + offset +
+					sizeof(*fw_rev) + i * sizeof(*por_event);
+				json_object_add_value_uint(valid_attrs, "ctrl_id",
+					le16_to_cpu(por_event->cid));
+				json_object_add_value_uint(valid_attrs, "fw_act",
+					por_event->fw_act);
+				json_object_add_value_uint(valid_attrs, "op_in_prog",
+					por_event->op_in_prog);
+				json_object_add_value_uint(valid_attrs, "ctrl_power_cycle",
+					le32_to_cpu(por_event->ctrl_power_cycle));
+				json_object_add_value_uint64(valid_attrs, "power_on_ml_secs",
+					le64_to_cpu(por_event->power_on_ml_seconds));
+				json_object_add_value_uint64(valid_attrs, "ctrl_time_stamp",
+					le64_to_cpu(por_event->ctrl_time_stamp));
+			}
+			break;
+		case NVME_PEL_NSS_HW_ERROR_EVENT:
+			nss_hw_err_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "nss_hw_err_code",
+				le16_to_cpu(nss_hw_err_event->nss_hw_err_event_code));
+			break;
+		case NVME_PEL_CHANGE_NS_EVENT:
+			ns_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "nsmgt_cdw10",
+				le32_to_cpu(ns_event->nsmgt_cdw10));
+			json_object_add_value_uint64(valid_attrs, "nsze",
+				le64_to_cpu(ns_event->nsze));
+			json_object_add_value_uint64(valid_attrs, "nscap",
+				le64_to_cpu(ns_event->nscap));
+			json_object_add_value_uint(valid_attrs, "flbas",
+				ns_event->flbas);
+			json_object_add_value_uint(valid_attrs, "dps",
+				ns_event->dps);
+			json_object_add_value_uint(valid_attrs, "nmic",
+				ns_event->nmic);
+			json_object_add_value_uint(valid_attrs, "ana_grp_id",
+				le32_to_cpu(ns_event->ana_grp_id));
+			json_object_add_value_uint(valid_attrs, "nvmset_id",
+				le16_to_cpu(ns_event->nvmset_id));
+			json_object_add_value_uint(valid_attrs, "nsid",
+				le32_to_cpu(ns_event->nsid));
+			break;
+		case NVME_PEL_FORMAT_START_EVENT:
+			format_start_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "nsid",
+				le32_to_cpu(format_start_event->nsid));
+			json_object_add_value_uint(valid_attrs, "fna",
+				format_start_event->fna);
+			json_object_add_value_uint(valid_attrs, "format_nvm_cdw10",
+				le32_to_cpu(format_start_event->format_nvm_cdw10));
+			break;
+		case NVME_PEL_FORMAT_COMPLETION_EVENT:
+			format_cmpln_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "nsid",
+				le32_to_cpu(format_cmpln_event->nsid));
+			json_object_add_value_uint(valid_attrs, "smallest_fpi",
+				format_cmpln_event->smallest_fpi);
+			json_object_add_value_uint(valid_attrs, "format_nvm_status",
+				format_cmpln_event->format_nvm_status);
+			json_object_add_value_uint(valid_attrs, "compln_info",
+				le16_to_cpu(format_cmpln_event->compln_info));
+			json_object_add_value_uint(valid_attrs, "status_field",
+				le32_to_cpu(format_cmpln_event->status_field));
+			break;
+		case NVME_PEL_SANITIZE_START_EVENT:
+			sanitize_start_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "SANICAP",
+				le32_to_cpu(sanitize_start_event->sani_cap));
+			json_object_add_value_uint(valid_attrs, "sani_cdw10",
+				le32_to_cpu(sanitize_start_event->sani_cdw10));
+			json_object_add_value_uint(valid_attrs, "sani_cdw11",
+				le32_to_cpu(sanitize_start_event->sani_cdw11));
+			break;
+		case NVME_PEL_SANITIZE_COMPLETION_EVENT:
+			sanitize_cmpln_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "sani_prog",
+				le16_to_cpu(sanitize_cmpln_event->sani_prog));
+			json_object_add_value_uint(valid_attrs, "sani_status",
+				le16_to_cpu(sanitize_cmpln_event->sani_status));
+			json_object_add_value_uint(valid_attrs, "cmpln_info",
+				le16_to_cpu(sanitize_cmpln_event->cmpln_info));
+			break;
+		case NVME_PEL_THERMAL_EXCURSION_EVENT:
+			thermal_exc_event = pevent_log_info + offset;
+			json_object_add_value_uint(valid_attrs, "over_temp",
+				thermal_exc_event->over_temp);
+			json_object_add_value_uint(valid_attrs, "threshold",
+				thermal_exc_event->threshold);
+			break;
+		}
+
+		json_array_add_value_object(valid, valid_attrs);
+		offset += le16_to_cpu(pevent_entry_head->el);
+	}
+
+	json_object_add_value_array(root, "list_of_event_entries", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_endurance_group_event_agg_log(
+	struct nvme_aggregate_predictable_lat_event *endurance_log,
+	__u64 log_entries)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+
+	root = json_create_object();
+	json_object_add_value_uint64(root, "num_entries_avail",
+		le64_to_cpu(endurance_log->num_entries));
+	valid = json_create_array();
+
+	for (int i = 0; i < log_entries; i++) {
+		valid_attrs = json_create_object();
+		json_object_add_value_uint(valid_attrs, "entry",
+			le16_to_cpu(endurance_log->entries[i]));
+		json_array_add_value_object(valid, valid_attrs);
+	}
+	json_object_add_value_array(root, "list_of_entries", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_lba_status_log(void *lba_status)
+{
+	struct json_object *root;
+	struct json_object *desc;
+	struct json_object *element;
+	struct json_object *desc_list;
+	struct json_object *elements_list;
+	struct nvme_lba_status_log *hdr;
+	struct nvme_lbas_ns_element *ns_element;
+	struct nvme_lba_rd *range_desc;
+	int offset = sizeof(*hdr);
+	__u32 num_lba_desc, num_elements;
+
+	root = json_create_object();
+	hdr = lba_status;
+	json_object_add_value_uint(root, "lslplen", le32_to_cpu(hdr->lslplen));
+	num_elements = le32_to_cpu(hdr->nlslne);
+	json_object_add_value_uint(root, "nlslne", num_elements);
+	json_object_add_value_uint(root, "estulb", le32_to_cpu(hdr->estulb));
+	json_object_add_value_uint(root, "lsgc", le16_to_cpu(hdr->lsgc));
+
+	elements_list = json_create_array();
+	for (int ele = 0; ele < num_elements; ele++) {
+		ns_element = lba_status + offset;
+		element = json_create_object();
+		json_object_add_value_uint(element, "neid",
+			le32_to_cpu(ns_element->neid));
+		num_lba_desc = le32_to_cpu(ns_element->nlrd);
+		json_object_add_value_uint(element, "nlrd", num_lba_desc);
+		json_object_add_value_uint(element, "ratype", ns_element->ratype);
+
+		offset += sizeof(*ns_element);
+		desc_list = json_create_array();
+		if (num_lba_desc != 0xffffffff) {
+			for (int i = 0; i < num_lba_desc; i++) {
+				range_desc = lba_status + offset;
+				desc = json_create_object();
+				json_object_add_value_uint64(desc, "rslba",
+					le64_to_cpu(range_desc->rslba));
+				json_object_add_value_uint(desc, "rnlb",
+					le32_to_cpu(range_desc->rnlb));
+
+				offset += sizeof(*range_desc);
+				json_array_add_value_object(desc_list, desc);
+			}
+		} else {
+			printf("Number of LBA Range Descriptors (NLRD) set to %#x for " \
+				"NS element %d", num_lba_desc, ele);
+		}
+
+		json_object_add_value_array(element, "descs", desc_list);
+		json_array_add_value_object(elements_list, element);
+	}
+
+	json_object_add_value_array(root, "ns_elements", elements_list);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_resv_notif_log(struct nvme_resv_notification_log *resv)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+	json_object_add_value_uint64(root, "count",
+		le64_to_cpu(resv->lpc));
+	json_object_add_value_uint(root, "rn_log_type",
+		resv->rnlpt);
+	json_object_add_value_uint(root, "num_logs",
+		resv->nalp);
+	json_object_add_value_uint(root, "nsid",
+		le32_to_cpu(resv->nsid));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_fid_support_effects_log(struct nvme_fid_supported_effects_log *fid_log)
+{
+	struct json_object *root;
+	struct json_object *fids;
+	struct json_object *fids_list;
+	unsigned int fid;
+	char key[128];
+	__u32 fid_support;
+
+	root = json_create_object();
+	fids_list = json_create_array();
+	for (fid = 0; fid < 256; 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);
+			json_object_add_value_uint(fids, key, fid_support);
+			json_array_add_value_object(fids_list, fids);
+		}
+	}
+
+	json_object_add_value_object(root, "fid_support", fids_list);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_mi_cmd_support_effects_log(struct nvme_mi_cmd_supported_effects_log *mi_cmd_log)
+{
+	struct json_object *root;
+	struct json_object *mi_cmds;
+	struct json_object *mi_cmds_list;
+	unsigned int mi_cmd;
+	char key[128];
+	__u32 mi_cmd_support;
+
+	root = json_create_object();
+	mi_cmds_list = json_create_array();
+	for (mi_cmd = 0; mi_cmd < 256; 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);
+			json_object_add_value_uint(mi_cmds, key, mi_cmd_support);
+			json_array_add_value_object(mi_cmds_list, mi_cmds);
+		}
+	}
+
+	json_object_add_value_object(root, "mi_command_support", mi_cmds_list);
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_boot_part_log(void *bp_log)
+{
+	struct nvme_boot_partition *hdr;
+	struct json_object *root;
+
+	hdr = bp_log;
+	root = json_create_object();
+
+	json_object_add_value_uint(root, "count", hdr->lid);
+	json_object_add_value_uint(root, "abpid",
+		(le32_to_cpu(hdr->bpinfo) >> 31) & 0x1);
+	json_object_add_value_uint(root, "bpsz",
+		le32_to_cpu(hdr->bpinfo) & 0x7fff);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_media_unit_stat_log(struct nvme_media_unit_stat_log *mus)
+{
+	struct json_object *root;
+	struct json_object *entries;
+	struct json_object *entry;
+	int i;
+
+	root = json_create_object();
+	entries = json_create_array();
+
+	json_object_add_value_uint(root, "nmu", le16_to_cpu(mus->nmu));
+	json_object_add_value_uint(root, "cchans", le16_to_cpu(mus->cchans));
+	json_object_add_value_uint(root, "sel_config", le16_to_cpu(mus->sel_config));
+
+	for (i = 0; i < mus->nmu; i++) {
+		entry = json_create_object();
+		json_object_add_value_uint(entry, "muid", le16_to_cpu(mus->mus_desc[i].muid));
+		json_object_add_value_uint(entry, "domainid", le16_to_cpu(mus->mus_desc[i].domainid));
+		json_object_add_value_uint(entry, "endgid", le16_to_cpu(mus->mus_desc[i].endgid));
+		json_object_add_value_uint(entry, "nvmsetid", le16_to_cpu(mus->mus_desc[i].nvmsetid));
+		json_object_add_value_uint(entry, "cap_adj_fctr", le16_to_cpu(mus->mus_desc[i].cap_adj_fctr));
+		json_object_add_value_uint(entry, "avl_spare", mus->mus_desc[i].avl_spare);
+		json_object_add_value_uint(entry, "percent_used", mus->mus_desc[i].percent_used);
+		json_object_add_value_uint(entry, "mucs", mus->mus_desc[i].mucs);
+		json_object_add_value_uint(entry, "cio", mus->mus_desc[i].cio);
+		json_array_add_value_object(entries, entry);
+	}
+
+	json_object_add_value_array(root, "mus_list", entries);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_supported_cap_config_log(
+	struct nvme_supported_cap_config_list_log *cap_log)
+{
+	struct json_object *root;
+	struct json_object *cap_list;
+	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, sccn, egcn, egsets, egchans, chmus;
+
+	root = json_create_object();
+
+	json_object_add_value_uint(root, "sccn", cap_log->sccn);
+	cap_list = json_create_array();
+	sccn = cap_log->sccn;
+	for (i = 0; i < sccn; i++) {
+		capacity = json_create_object();
+		json_object_add_value_uint(capacity, "cap_config_id",
+			le16_to_cpu(cap_log->cap_config_desc[i].cap_config_id));
+		json_object_add_value_uint(capacity, "domainid",
+			le16_to_cpu(cap_log->cap_config_desc[i].domainid));
+		json_object_add_value_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();
+			json_object_add_value_uint(endurance, "endgid",
+				le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].endgid));
+			json_object_add_value_uint(endurance, "cap_adj_factor",
+				le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].cap_adj_factor));
+			json_object_add_value_uint128(endurance, "tegcap",
+				le128_to_cpu(cap_log->cap_config_desc[i].egcd[j].tegcap));
+			json_object_add_value_uint128(endurance, "segcap",
+				le128_to_cpu(cap_log->cap_config_desc[i].egcd[j].segcap));
+			json_object_add_value_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();
+				json_object_add_value_uint(set, "nvmsetid",
+					le16_to_cpu(cap_log->cap_config_desc[i].egcd[j].nvmsetid[k]));
+				json_array_add_value_object(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);
+			json_object_add_value_uint(endurance, "egchans",
+				le16_to_cpu(chan_desc->egchans));
+			chan_list = json_create_array();
+			for (l = 0; l < egchans; l++) {
+				channel = json_create_object();
+				json_object_add_value_uint(channel, "chanid",
+					le16_to_cpu(chan_desc->chan_config_desc[l].chanid));
+				json_object_add_value_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();
+					json_object_add_value_uint(media, "chanid",
+						le16_to_cpu(chan_desc->chan_config_desc[l].mu_config_desc[m].muid));
+					json_object_add_value_uint(media, "chmus",
+						le16_to_cpu(chan_desc->chan_config_desc[l].mu_config_desc[m].mudl));
+					json_array_add_value_object(media_list, media);
+				}
+				json_object_add_value_array(channel, "Media Descriptor", media_list);
+				json_array_add_value_object(chan_list, channel);
+			}
+			json_object_add_value_array(endurance, "Channel Descriptor", chan_list);
+			json_object_add_value_array(endurance, "NVM Set IDs", set_list);
+			json_array_add_value_object(end_list, endurance);
+		}
+		json_object_add_value_array(capacity, "Endurance Descriptor", end_list);
+		json_array_add_value_object(cap_list, capacity);
+	}
+
+	json_object_add_value_array(root, "Capacity Descriptor", cap_list);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_fdp_configs(struct nvme_fdp_config_log *log, size_t len)
+{
+	struct json_object *root, *obj_configs;
+	uint16_t n;
+
+	void *p = log->configs;
+
+	root = json_create_object();
+	obj_configs = json_create_array();
+
+	n = le16_to_cpu(log->n);
+
+	json_object_add_value_uint(root, "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();
+
+		json_object_add_value_uint(obj_config, "fdpa", config->fdpa);
+		json_object_add_value_uint(obj_config, "vss", config->vss);
+		json_object_add_value_uint(obj_config, "nrg", le32_to_cpu(config->nrg));
+		json_object_add_value_uint(obj_config, "nruh", le16_to_cpu(config->nruh));
+		json_object_add_value_uint(obj_config, "nnss", le32_to_cpu(config->nnss));
+		json_object_add_value_uint64(obj_config, "runs", le64_to_cpu(config->runs));
+		json_object_add_value_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();
+
+			json_object_add_value_uint(obj_ruh, "ruht", ruh->ruht);
+
+			json_array_add_value_object(obj_ruhs, obj_ruh);
+		}
+
+		json_array_add_value_object(obj_configs, obj_config);
+
+		p += config->size;
+	}
+
+	json_object_add_value_array(root, "configs", obj_configs);
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_nvme_fdp_usage(struct nvme_fdp_ruhu_log *log, size_t len)
+{
+	struct json_object *root, *obj_ruhus;
+	uint16_t nruh;
+
+	root = json_create_object();
+	obj_ruhus = json_create_array();
+
+	nruh = le16_to_cpu(log->nruh);
+
+	json_object_add_value_uint(root, "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();
+
+		json_object_add_value_uint(obj_ruhu, "ruha", ruhu->ruha);
+
+		json_array_add_value_object(obj_ruhus, obj_ruhu);
+	}
+
+	json_object_add_value_array(root, "ruhus", obj_ruhus);
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_nvme_fdp_stats(struct nvme_fdp_stats_log *log)
+{
+	struct json_object *root = json_create_object();
+
+	json_object_add_value_uint128(root, "hbmw", le128_to_cpu(log->hbmw));
+	json_object_add_value_uint128(root, "mbmw", le128_to_cpu(log->mbmw));
+	json_object_add_value_uint128(root, "mbe", le128_to_cpu(log->mbe));
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_nvme_fdp_events(struct nvme_fdp_events_log *log)
+{
+	struct json_object *root, *obj_events;
+	uint32_t n;
+
+	root = json_create_object();
+	obj_events = json_create_array();
+
+	n = le32_to_cpu(log->n);
+
+	json_object_add_value_uint(root, "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();
+
+		json_object_add_value_uint(obj_event, "type", event->type);
+		json_object_add_value_uint(obj_event, "fdpef", event->flags);
+		json_object_add_value_uint(obj_event, "pid", le16_to_cpu(event->pid));
+		json_object_add_value_uint64(obj_event, "timestamp", le64_to_cpu(*(uint64_t *)&event->ts));
+		json_object_add_value_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;
+
+			json_object_add_value_uint(obj_event, "nlbam", le16_to_cpu(mr->nlbam));
+
+			if (mr->flags & NVME_FDP_EVENT_REALLOC_F_LBAV)
+				json_object_add_value_uint64(obj_event, "lba", le64_to_cpu(mr->lba));
+		}
+
+		json_array_add_value_object(obj_events, obj_event);
+	}
+
+	json_object_add_value_array(root, "events", obj_events);
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_nvme_fdp_ruh_status(struct nvme_fdp_ruh_status *status, size_t len)
+{
+	struct json_object *root, *obj_ruhss;
+	uint16_t nruhsd;
+
+	root = json_create_object();
+	obj_ruhss = json_create_array();
+
+	nruhsd = le16_to_cpu(status->nruhsd);
+
+	json_object_add_value_uint(root, "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();
+
+		json_object_add_value_uint(obj_ruhs, "pid", le16_to_cpu(ruhs->pid));
+		json_object_add_value_uint(obj_ruhs, "ruhid", le16_to_cpu(ruhs->ruhid));
+		json_object_add_value_uint(obj_ruhs, "earutr", le32_to_cpu(ruhs->earutr));
+		json_object_add_value_uint64(obj_ruhs, "ruamw", le64_to_cpu(ruhs->ruamw));
+
+		json_array_add_value_object(obj_ruhss, obj_ruhs);
+	}
+
+	json_object_add_value_array(root, "ruhss", obj_ruhss);
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+static unsigned int json_print_nvme_subsystem_multipath(nvme_subsystem_t s,
+							bool show_ana,
+						        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();
+		json_object_add_value_string(path_attrs, "Name",
+					     nvme_ctrl_get_name(c));
+		json_object_add_value_string(path_attrs, "Transport",
+					     nvme_ctrl_get_transport(c));
+		json_object_add_value_string(path_attrs, "Address",
+					     nvme_ctrl_get_address(c));
+		json_object_add_value_string(path_attrs, "State",
+					     nvme_ctrl_get_state(c));
+		if (show_ana)
+			json_object_add_value_string(path_attrs, "ANAState",
+						     nvme_path_get_ana_state(p));
+		json_array_add_value_object(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();
+		json_object_add_value_string(path_attrs, "Name",
+					     nvme_ctrl_get_name(c));
+		json_object_add_value_string(path_attrs, "Transport",
+					     nvme_ctrl_get_transport(c));
+		json_object_add_value_string(path_attrs, "Address",
+					     nvme_ctrl_get_address(c));
+		json_object_add_value_string(path_attrs, "State",
+					     nvme_ctrl_get_state(c));
+		json_array_add_value_object(paths, path_attrs);
+	}
+}
+
+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 *root;
+	nvme_host_t h;
+
+	root = json_create_array();
+
+	nvme_for_each_host(r, h) {
+		nvme_subsystem_t s;
+		const char *hostid;
+
+		host_attrs = json_create_object();
+		json_object_add_value_string(host_attrs, "HostNQN",
+					     nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			json_object_add_value_string(host_attrs, "HostID", hostid);
+		subsystems = json_create_array();
+		nvme_for_each_subsystem(h, s) {
+			subsystem_attrs = json_create_object();
+			json_object_add_value_string(subsystem_attrs, "Name",
+						     nvme_subsystem_get_name(s));
+			json_object_add_value_string(subsystem_attrs, "NQN",
+						     nvme_subsystem_get_nqn(s));
+
+			json_array_add_value_object(subsystems, subsystem_attrs);
+			paths = json_create_array();
+
+			if (!json_print_nvme_subsystem_multipath(s, show_ana, paths))
+				json_print_nvme_subsystem_ctrls(s, paths);
+
+			json_object_add_value_array(subsystem_attrs, "Paths",
+						    paths);
+		}
+		json_object_add_value_array(host_attrs, "Subsystems", subsystems);
+		json_array_add_value_object(root, host_attrs);
+	}
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_ctrl_registers(void *bar)
+{
+	uint64_t cap, asq, acq, bpmbl, cmbmsc;
+	uint32_t vs, intms, intmc, cc, csts, nssr, crto, aqa, cmbsz, cmbloc,
+		bpinfo, bprsel, cmbsts, pmrcap, pmrctl, pmrsts, pmrebs, pmrswtp,
+		pmrmscl, pmrmscu;
+	struct json_object *root;
+
+	cap = mmio_read64(bar + NVME_REG_CAP);
+	vs = mmio_read32(bar + NVME_REG_VS);
+	intms = mmio_read32(bar + NVME_REG_INTMS);
+	intmc = mmio_read32(bar + NVME_REG_INTMC);
+	cc = mmio_read32(bar + NVME_REG_CC);
+	csts = mmio_read32(bar + NVME_REG_CSTS);
+	nssr = mmio_read32(bar + NVME_REG_NSSR);
+	crto = mmio_read32(bar + NVME_REG_CRTO);
+	aqa = mmio_read32(bar + NVME_REG_AQA);
+	asq = mmio_read64(bar + NVME_REG_ASQ);
+	acq = mmio_read64(bar + NVME_REG_ACQ);
+	cmbloc = mmio_read32(bar + NVME_REG_CMBLOC);
+	cmbsz = mmio_read32(bar + NVME_REG_CMBSZ);
+	bpinfo = mmio_read32(bar + NVME_REG_BPINFO);
+	bprsel = mmio_read32(bar + NVME_REG_BPRSEL);
+	bpmbl = mmio_read64(bar + NVME_REG_BPMBL);
+	cmbmsc = mmio_read64(bar + NVME_REG_CMBMSC);
+	cmbsts = mmio_read32(bar + NVME_REG_CMBSTS);
+	pmrcap = mmio_read32(bar + NVME_REG_PMRCAP);
+	pmrctl = mmio_read32(bar + NVME_REG_PMRCTL);
+	pmrsts = mmio_read32(bar + NVME_REG_PMRSTS);
+	pmrebs = mmio_read32(bar + NVME_REG_PMREBS);
+	pmrswtp = mmio_read32(bar + NVME_REG_PMRSWTP);
+	pmrmscl = mmio_read32(bar + NVME_REG_PMRMSCL);
+	pmrmscu = mmio_read32(bar + NVME_REG_PMRMSCU);
+
+	root = json_create_object();
+	json_object_add_value_uint64(root, "cap", cap);
+	json_object_add_value_int(root, "vs", vs);
+	json_object_add_value_int(root, "intms", intms);
+	json_object_add_value_int(root, "intmc", intmc);
+	json_object_add_value_int(root, "cc", cc);
+	json_object_add_value_int(root, "csts", csts);
+	json_object_add_value_int(root, "nssr", nssr);
+	json_object_add_value_int(root, "crto", crto);
+	json_object_add_value_int(root, "aqa", aqa);
+	json_object_add_value_uint64(root, "asq", asq);
+	json_object_add_value_uint64(root, "acq", acq);
+	json_object_add_value_int(root, "cmbloc", cmbloc);
+	json_object_add_value_int(root, "cmbsz", cmbsz);
+	json_object_add_value_int(root, "bpinfo", bpinfo);
+	json_object_add_value_int(root, "bprsel", bprsel);
+	json_object_add_value_uint64(root, "bpmbl", bpmbl);
+	json_object_add_value_uint64(root, "cmbmsc", cmbmsc);
+	json_object_add_value_int(root, "cmbsts", cmbsts);
+	json_object_add_value_int(root, "pmrcap", pmrcap);
+	json_object_add_value_int(root, "pmrctl", pmrctl);
+	json_object_add_value_int(root, "pmrsts", pmrsts);
+	json_object_add_value_int(root, "pmrebs", pmrebs);
+	json_object_add_value_int(root, "pmrswtp", pmrswtp);
+	json_object_add_value_uint(root, "pmrmscl", pmrmscl);
+	json_object_add_value_uint(root, "pmrmscu", pmrmscu);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+static void d_json(unsigned char *buf, int len, int width, int group,
+	    struct json_object *array)
+{
+	int i, line_done = 0;
+	char ascii[32 + 1];
+	assert(width < sizeof(ascii));
+
+	for (i = 0; i < len; i++) {
+		line_done = 0;
+		ascii[i % width] = (buf[i] >= '!' && buf[i] <= '~') ? buf[i] : '.';
+		if (((i + 1) % width) == 0) {
+			ascii[i % width + 1] = '\0';
+			json_array_add_value_string(array, ascii);
+			line_done = 1;
+		}
+	}
+	if (!line_done) {
+		ascii[i % width + 1] = '\0';
+		json_array_add_value_string(array, ascii);
+	}
+}
+
+void json_nvme_cmd_set_independent_id_ns(
+	struct nvme_id_independent_id_ns *ns)
+{
+	struct json_object *root;
+	root = json_create_object();
+
+	json_object_add_value_int(root, "nsfeat", ns->nsfeat);
+	json_object_add_value_int(root, "nmic", ns->nmic);
+	json_object_add_value_int(root, "rescap", ns->rescap);
+	json_object_add_value_int(root, "fpi", ns->fpi);
+	json_object_add_value_uint(root, "anagrpid", le32_to_cpu(ns->anagrpid));
+	json_object_add_value_int(root, "nsattr", ns->nsattr);
+	json_object_add_value_int(root, "nvmsetid", le16_to_cpu(ns->nvmsetid));
+	json_object_add_value_int(root, "endgid", le16_to_cpu(ns->endgid));
+	json_object_add_value_int(root, "nstat", ns->nstat);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_id_ns_descs(void *data)
+{
+	/* large enough to hold uuid str (37) or nguid str (32) + zero byte */
+	char json_str[40];
+	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 *root;
+	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();
+
+			json_object_add_value_int(elem, "loc", pos);
+			json_object_add_value_int(elem, "nidt", (int)cur->nidt);
+			json_object_add_value_int(elem, "nidl", (int)cur->nidl);
+			json_object_add_value_string(elem, "type", nidt_name);
+			json_object_add_value_string(elem, nidt_name, json_str);
+
+			if (!json_array) {
+				json_array = json_create_array();
+			}
+			json_array_add_value_object(json_array, elem);
+		}
+
+		len += sizeof(*cur);
+	}
+
+	root = json_create_object();
+
+	if (json_array)
+		json_object_add_value_array(root, "ns-descs", json_array);
+
+	json_print_object(root, NULL);
+	printf("\n");
+
+	json_free_object(root);
+}
+
+void json_nvme_id_ctrl_nvm(struct nvme_id_ctrl_nvm *ctrl_nvm)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+	json_object_add_value_uint(root, "vsl", ctrl_nvm->vsl);
+	json_object_add_value_uint(root, "wzsl", ctrl_nvm->wzsl);
+	json_object_add_value_uint(root, "wusl", ctrl_nvm->wusl);
+	json_object_add_value_uint(root, "dmrl", ctrl_nvm->dmrl);
+	json_object_add_value_uint(root, "dmrsl", le32_to_cpu(ctrl_nvm->dmrsl));
+	json_object_add_value_uint64(root, "dmsl", le64_to_cpu(ctrl_nvm->dmsl));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_nvm_id_ns(struct nvme_nvm_id_ns *nvm_ns,
+			 struct nvme_id_ns *ns, bool cap_only)
+{
+	struct json_object *root;
+	struct json_object *elbafs;
+	int i;
+
+	root = json_create_object();
+
+	if (!cap_only) {
+		json_object_add_value_uint64(root, "lbstm", le64_to_cpu(nvm_ns->lbstm));
+	}
+	json_object_add_value_int(root, "pic", nvm_ns->pic);
+
+	elbafs = json_create_array();
+	json_object_add_value_array(root, "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]);
+
+		json_object_add_value_uint(elbaf, "sts", elbaf_val & 0x7F);
+		json_object_add_value_uint(elbaf, "pif", (elbaf_val >> 7) & 0x3);
+
+		json_array_add_value_object(elbafs, elbaf);
+	}
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_zns_id_ctrl(struct nvme_zns_id_ctrl *ctrl)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+	json_object_add_value_int(root, "zasl", ctrl->zasl);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_zns_id_ns(struct nvme_zns_id_ns *ns,
+			 struct nvme_id_ns *id_ns)
+{
+	struct json_object *root;
+	struct json_object *lbafs;
+	int i;
+
+	root = json_create_object();
+	json_object_add_value_int(root, "zoc", le16_to_cpu(ns->zoc));
+	json_object_add_value_int(root, "ozcs", le16_to_cpu(ns->ozcs));
+	json_object_add_value_uint(root, "mar", le32_to_cpu(ns->mar));
+	json_object_add_value_uint(root, "mor", le32_to_cpu(ns->mor));
+	json_object_add_value_uint(root, "rrl", le32_to_cpu(ns->rrl));
+	json_object_add_value_uint(root, "frl", le32_to_cpu(ns->frl));
+	json_object_add_value_uint(root, "rrl1", le32_to_cpu(ns->rrl1));
+	json_object_add_value_uint(root, "rrl2", le32_to_cpu(ns->rrl2));
+	json_object_add_value_uint(root, "rrl3", le32_to_cpu(ns->rrl3));
+	json_object_add_value_uint(root, "frl1", le32_to_cpu(ns->frl1));
+	json_object_add_value_uint(root, "frl2", le32_to_cpu(ns->frl2));
+	json_object_add_value_uint(root, "frl3", le32_to_cpu(ns->frl3));
+	json_object_add_value_uint(root, "numzrwa", le32_to_cpu(ns->numzrwa));
+	json_object_add_value_int(root, "zrwafg", le16_to_cpu(ns->zrwafg));
+	json_object_add_value_int(root, "zrwasz", le16_to_cpu(ns->zrwasz));
+	json_object_add_value_int(root, "zrwacap", ns->zrwacap);
+
+	lbafs = json_create_array();
+	json_object_add_value_array(root, "lbafe", lbafs);
+
+	for (i = 0; i <= id_ns->nlbaf; i++) {
+		struct json_object *lbaf = json_create_object();
+
+		json_object_add_value_int(lbaf, "zsze",
+			le64_to_cpu(ns->lbafe[i].zsze));
+		json_object_add_value_int(lbaf, "zdes", ns->lbafe[i].zdes);
+
+		json_array_add_value_object(lbafs, lbaf);
+	}
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_list_ns(struct nvme_ns_list *ns_list)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+	int i;
+
+	root = json_create_object();
+	valid = json_create_array();
+
+	for (i = 0; i < 1024; i++) {
+		if (ns_list->ns[i]) {
+			valid_attrs = json_create_object();
+			json_object_add_value_uint(valid_attrs, "nsid",
+				le32_to_cpu(ns_list->ns[i]));
+			json_array_add_value_object(valid, valid_attrs);
+		}
+	}
+	json_object_add_value_array(root, "nsid_list", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_finish_zone_list(__u64 nr_zones,
+				struct json_object *zone_list)
+{
+	struct json_object *root = json_create_object();
+	json_object_add_value_uint(root, "nr_zones", nr_zones);
+	json_object_add_value_array(root, "zone_list", zone_list);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+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();
+
+		json_object_add_value_uint64(zone, "slba",
+					     le64_to_cpu(desc->zslba));
+		json_object_add_value_uint64(zone, "wp",
+					     le64_to_cpu(desc->wp));
+		json_object_add_value_uint64(zone, "cap",
+					     le64_to_cpu(desc->zcap));
+		json_object_add_value_string(zone, "state",
+			zone_state_to_string(desc->zs >> 4));
+		json_object_add_value_string(zone, "type",
+			zone_type_to_string(desc->zt));
+		json_object_add_value_uint(zone, "attrs", desc->za);
+		json_object_add_value_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);
+				json_object_add_value_array(zone, "ext_data",
+					ext_data);
+			} else {
+				json_object_add_value_string(zone, "ext_data", "Not valid");
+			}
+		}
+
+		json_array_add_value_object(zone_list, zone);
+	}
+}
+
+void json_nvme_list_ctrl(struct nvme_ctrl_list *ctrl_list, __u16 num)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+	int i;
+
+	root = json_create_object();
+	valid = json_create_array();
+
+	json_object_add_value_uint(root, "num_ctrl",
+		le16_to_cpu(ctrl_list->num));
+
+	for (i = 0; i < min(num, 2047); i++) {
+
+		valid_attrs = json_create_object();
+		json_object_add_value_uint(valid_attrs, "ctrl_id",
+			le16_to_cpu(ctrl_list->identifier[i]));
+		json_array_add_value_object(valid, valid_attrs);
+	}
+
+	json_object_add_value_array(root, "ctrl_list", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_id_nvmset(struct nvme_id_nvmset_list *nvmset)
+{
+	__u32 nent = nvmset->nid;
+	struct json_object *entries;
+	struct json_object *root;
+	int i;
+
+	root = json_create_object();
+
+	json_object_add_value_int(root, "nid", nent);
+
+	entries = json_create_array();
+	for (i = 0; i < nent; i++) {
+		struct json_object *entry = json_create_object();
+
+		json_object_add_value_int(entry, "nvmset_id",
+			  le16_to_cpu(nvmset->ent[i].nvmsetid));
+		json_object_add_value_int(entry, "endurance_group_id",
+			  le16_to_cpu(nvmset->ent[i].endgid));
+		json_object_add_value_uint(entry, "random_4k_read_typical",
+			  le32_to_cpu(nvmset->ent[i].rr4kt));
+		json_object_add_value_uint(entry, "optimal_write_size",
+			  le32_to_cpu(nvmset->ent[i].ows));
+		json_object_add_value_uint128(entry, "total_nvmset_cap",
+			    le128_to_cpu(nvmset->ent[i].tnvmsetcap));
+		json_object_add_value_uint128(entry, "unalloc_nvmset_cap",
+			    le128_to_cpu(nvmset->ent[i].unvmsetcap));
+		json_array_add_value_object(entries, entry);
+	}
+
+	json_object_add_value_array(root, "NVMSet", entries);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_primary_ctrl_cap(const struct nvme_primary_ctrl_cap *caps)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+
+	json_object_add_value_uint(root, "cntlid", le16_to_cpu(caps->cntlid));
+	json_object_add_value_uint(root, "portid", le16_to_cpu(caps->portid));
+	json_object_add_value_uint(root, "crt",    caps->crt);
+
+	json_object_add_value_uint(root, "vqfrt",  le32_to_cpu(caps->vqfrt));
+	json_object_add_value_uint(root, "vqrfa",  le32_to_cpu(caps->vqrfa));
+	json_object_add_value_int(root, "vqrfap", le16_to_cpu(caps->vqrfap));
+	json_object_add_value_int(root, "vqprt",  le16_to_cpu(caps->vqprt));
+	json_object_add_value_int(root, "vqfrsm", le16_to_cpu(caps->vqfrsm));
+	json_object_add_value_int(root, "vqgran", le16_to_cpu(caps->vqgran));
+
+	json_object_add_value_uint(root, "vifrt",  le32_to_cpu(caps->vifrt));
+	json_object_add_value_uint(root, "virfa",  le32_to_cpu(caps->virfa));
+	json_object_add_value_int(root, "virfap", le16_to_cpu(caps->virfap));
+	json_object_add_value_int(root, "viprt",  le16_to_cpu(caps->viprt));
+	json_object_add_value_int(root, "vifrsm", le16_to_cpu(caps->vifrsm));
+	json_object_add_value_int(root, "vigran", le16_to_cpu(caps->vigran));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+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;
+	struct json_object *root;
+	int i;
+
+	root = json_create_object();
+
+	json_object_add_value_int(root, "num", nent);
+
+	entries = json_create_array();
+	for (i = 0; i < nent; i++) {
+		struct json_object *entry = json_create_object();
+
+		json_object_add_value_int(entry,
+			"secondary-controller-identifier",
+			le16_to_cpu(sc_entry[i].scid));
+		json_object_add_value_int(entry,
+			"primary-controller-identifier",
+			le16_to_cpu(sc_entry[i].pcid));
+		json_object_add_value_int(entry, "secondary-controller-state",
+					  sc_entry[i].scs);
+		json_object_add_value_int(entry, "virtual-function-number",
+			le16_to_cpu(sc_entry[i].vfn));
+		json_object_add_value_int(entry, "num-virtual-queues",
+			le16_to_cpu(sc_entry[i].nvq));
+		json_object_add_value_int(entry, "num-virtual-interrupts",
+			le16_to_cpu(sc_entry[i].nvi));
+		json_array_add_value_object(entries, entry);
+	}
+
+	json_object_add_value_array(root, "secondary-controllers", entries);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_id_ns_granularity_list(
+	const struct nvme_id_ns_granularity_list *glist)
+{
+	int i;
+	struct json_object *root;
+	struct json_object *entries;
+
+	root = json_create_object();
+
+	json_object_add_value_int(root, "attributes", glist->attributes);
+	json_object_add_value_int(root, "num-descriptors",
+		glist->num_descriptors);
+
+	entries = json_create_array();
+	for (i = 0; i <= glist->num_descriptors; i++) {
+		struct json_object *entry = json_create_object();
+
+		json_object_add_value_uint64(entry, "namespace-size-granularity",
+			le64_to_cpu(glist->entry[i].nszegran));
+		json_object_add_value_uint64(entry, "namespace-capacity-granularity",
+			le64_to_cpu(glist->entry[i].ncapgran));
+		json_array_add_value_object(entries, entry);
+	}
+
+	json_object_add_value_array(root, "namespace-granularity-list", entries);
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_id_uuid_list(const struct nvme_id_uuid_list *uuid_list)
+{
+	struct json_object *root;
+	struct json_object *entries;
+	int i;
+
+	root = json_create_object();
+	entries = json_create_array();
+	/* The 0th entry is reserved */
+	for (i = 1; 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));
+		json_object_add_value_int(entry, "association",
+			uuid_list->entry[i].header & 0x3);
+		json_object_add_value_string(entry, "uuid",
+			util_uuid_to_string(uuid));
+		json_array_add_value_object(entries, entry);
+	}
+	json_object_add_value_array(root, "UUID-list", entries);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_id_domain_list(struct nvme_id_domain_list *id_dom)
+{
+	struct json_object *root;
+	struct json_object *entries;
+	struct json_object *entry;
+	int i;
+	nvme_uint128_t dom_cap, unalloc_dom_cap, max_egrp_dom_cap;
+
+	root = json_create_object();
+	entries = json_create_array();
+
+	json_object_add_value_uint(root, "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);
+
+		json_object_add_value_uint(entry, "dom_id", le16_to_cpu(id_dom->domain_attr[i].dom_id));
+		json_object_add_value_uint128(entry, "dom_cap", dom_cap);
+		json_object_add_value_uint128(entry, "unalloc_dom_cap", unalloc_dom_cap);
+		json_object_add_value_uint128(entry, "max_egrp_dom_cap", max_egrp_dom_cap);
+
+		json_array_add_value_object(entries, entry);
+	}
+
+	json_object_add_value_array(root, "domain_list", entries);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_nvme_endurance_group_list(struct nvme_id_endurance_group_list *endgrp_list)
+{
+	struct json_object *root;
+	struct json_object *valid_attrs;
+	struct json_object *valid;
+	int i;
+
+	root = json_create_object();
+	valid = json_create_array();
+
+	json_object_add_value_uint(root, "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();
+		json_object_add_value_uint(valid_attrs, "endgrp_id",
+			le16_to_cpu(endgrp_list->identifier[i]));
+		json_array_add_value_object(valid, valid_attrs);
+	}
+
+	json_object_add_value_array(root, "endgrp_list", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_support_log(struct nvme_supported_log_pages *support_log)
+{
+	struct json_object *root;
+	struct json_object *valid;
+	struct json_object *valid_attrs;
+	unsigned int lid;
+	char key[128];
+	__u32 support;
+
+	root = json_create_object();
+	valid = json_create_array();
+
+	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);
+			json_object_add_value_uint(valid_attrs, key, support);
+			json_array_add_value_object(valid, valid_attrs);
+		}
+	}
+
+	json_object_add_value_object(root, "supported_logs", valid);
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+static void json_detail_list(nvme_root_t r)
+{
+	struct json_object *jroot = 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(r, h) {
+		struct json_object *hss = json_create_object();
+		struct json_object *jsslist = json_create_array();
+		const char *hostid;
+
+		json_object_add_value_string(hss, "HostNQN", nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			json_object_add_value_string(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();
+
+			json_object_add_value_string(jss, "Subsystem", nvme_subsystem_get_name(s));
+			json_object_add_value_string(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();
+
+				json_object_add_value_string(jctrl, "Controller", nvme_ctrl_get_name(c));
+				json_object_add_value_string(jctrl, "SerialNumber", nvme_ctrl_get_serial(c));
+				json_object_add_value_string(jctrl, "ModelNumber", nvme_ctrl_get_model(c));
+				json_object_add_value_string(jctrl, "Firmware", nvme_ctrl_get_firmware(c));
+				json_object_add_value_string(jctrl, "Transport", nvme_ctrl_get_transport(c));
+				json_object_add_value_string(jctrl, "Address", nvme_ctrl_get_address(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;
+
+					json_object_add_value_string(jns, "NameSpace", nvme_ns_get_name(n));
+					json_object_add_value_string(jns, "Generic", nvme_ns_get_generic_name(n));
+					json_object_add_value_int(jns, "NSID", nvme_ns_get_nsid(n));
+					json_object_add_value_uint64(jns, "UsedBytes", nuse);
+					json_object_add_value_uint64(jns, "MaximumLBA", nvme_ns_get_lba_count(n));
+					json_object_add_value_uint64(jns, "PhysicalSize", nsze);
+					json_object_add_value_int(jns, "SectorSize", lba);
+
+					json_array_add_value_object(jnss, jns);
+				}
+				json_object_add_value_object(jctrl, "Namespaces", jnss);
+
+				nvme_ctrl_for_each_path(c, p) {
+					struct json_object *jpath = json_create_object();
+
+					json_object_add_value_string(jpath, "Path", nvme_path_get_name(p));
+					json_object_add_value_string(jpath, "ANAState", nvme_path_get_ana_state(p));
+
+					json_array_add_value_object(jpaths, jpath);
+				}
+				json_object_add_value_object(jctrl, "Paths", jpaths);
+
+				json_array_add_value_object(jctrls, jctrl);
+			}
+			json_object_add_value_object(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;
+
+				json_object_add_value_string(jns, "NameSpace", nvme_ns_get_name(n));
+				json_object_add_value_string(jns, "Generic", nvme_ns_get_generic_name(n));
+				json_object_add_value_int(jns, "NSID", nvme_ns_get_nsid(n));
+				json_object_add_value_uint64(jns, "UsedBytes", nuse);
+				json_object_add_value_uint64(jns, "MaximumLBA", nvme_ns_get_lba_count(n));
+				json_object_add_value_uint64(jns, "PhysicalSize", nsze);
+				json_object_add_value_int(jns, "SectorSize", lba);
+
+				json_array_add_value_object(jnss, jns);
+			}
+			json_object_add_value_object(jss, "Namespaces", jnss);
+
+			json_array_add_value_object(jsslist, jss);
+		}
+
+		json_object_add_value_object(hss, "Subsystems", jsslist);
+		json_array_add_value_object(jdev, hss);
+	}
+	json_object_add_value_array(jroot, "Devices", jdev);
+	json_print_object(jroot, NULL);
+	printf("\n");
+	json_free_object(jroot);
+}
+
+static struct json_object *json_list_item(nvme_ns_t n)
+{
+	struct json_object *jdevice = json_create_object();
+	char devname[128] = { 0 };
+	char genname[128] = { 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));
+
+	json_object_add_value_int(jdevice, "NameSpace", nvme_ns_get_nsid(n));
+	json_object_add_value_string(jdevice, "DevicePath", devname);
+	json_object_add_value_string(jdevice, "GenericPath", genname);
+	json_object_add_value_string(jdevice, "Firmware", nvme_ns_get_firmware(n));
+	json_object_add_value_string(jdevice, "ModelNumber", nvme_ns_get_model(n));
+	json_object_add_value_string(jdevice, "SerialNumber", nvme_ns_get_serial(n));
+	json_object_add_value_uint64(jdevice, "UsedBytes", nuse);
+	json_object_add_value_uint64(jdevice, "MaximumLBA", nvme_ns_get_lba_count(n));
+	json_object_add_value_uint64(jdevice, "PhysicalSize", nsze);
+	json_object_add_value_int(jdevice, "SectorSize", lba);
+
+	return jdevice;
+}
+
+static void json_simple_list(nvme_root_t r)
+{
+	struct json_object *jroot = 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(r, h) {
+		nvme_for_each_subsystem(h, s) {
+			nvme_subsystem_for_each_ns(s, n)
+				json_array_add_value_object(jdevices,
+							    json_list_item(n));
+
+			nvme_subsystem_for_each_ctrl(s, c)
+				nvme_ctrl_for_each_ns(c, n)
+				json_array_add_value_object(jdevices,
+							    json_list_item(n));
+		}
+	}
+	json_object_add_value_array(jroot, "Devices", jdevices);
+	json_print_object(jroot, NULL);
+	printf("\n");
+	json_free_object(jroot);
+}
+
+void json_print_list_items(nvme_root_t r,
+			   enum nvme_print_flags flags)
+{
+	if (flags & VERBOSE)
+		json_detail_list(r);
+	else
+		json_simple_list(r);
+}
+
+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();
+	        json_object_add_value_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();
+			json_object_add_value_string(path_attrs, "Name",
+						     nvme_ctrl_get_name(c));
+			json_object_add_value_string(path_attrs, "Transport",
+						     nvme_ctrl_get_transport(c));
+			json_object_add_value_string(path_attrs, "Address",
+						     nvme_ctrl_get_address(c));
+			json_object_add_value_string(path_attrs, "State",
+						     nvme_ctrl_get_state(c));
+			json_object_add_value_string(path_attrs, "ANAState",
+						     nvme_path_get_ana_state(p));
+			json_array_add_value_object(paths, path_attrs);
+		}
+		json_object_add_value_array(ns_attrs, "Paths", paths);
+		json_array_add_value_object(namespaces, ns_attrs);
+		i++;
+	}
+
+	return i;
+}
+
+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();
+		        json_object_add_value_int(ns_attrs, "NSID",
+						  nvme_ns_get_nsid(n));
+
+		        ctrl = json_create_array();
+			ctrl_attrs = json_create_object();
+			json_object_add_value_string(ctrl_attrs, "Name",
+						     nvme_ctrl_get_name(c));
+			json_object_add_value_string(ctrl_attrs, "Transport",
+						     nvme_ctrl_get_transport(c));
+			json_object_add_value_string(ctrl_attrs, "Address",
+						     nvme_ctrl_get_address(c));
+			json_object_add_value_string(ctrl_attrs, "State",
+						     nvme_ctrl_get_state(c));
+
+			json_array_add_value_object(ctrl, ctrl_attrs);
+			json_object_add_value_array(ns_attrs, "Controller", ctrl);
+			json_array_add_value_object(namespaces, ns_attrs);
+		}
+	}
+}
+
+void json_simple_topology(nvme_root_t r)
+{
+	struct json_object *host_attrs, *subsystem_attrs;
+	struct json_object *subsystems, *namespaces;
+	struct json_object *root;
+	nvme_host_t h;
+
+	root = json_create_array();
+
+	nvme_for_each_host(r, h) {
+		nvme_subsystem_t s;
+		const char *hostid;
+
+		host_attrs = json_create_object();
+		json_object_add_value_string(host_attrs, "HostNQN",
+					     nvme_host_get_hostnqn(h));
+		hostid = nvme_host_get_hostid(h);
+		if (hostid)
+			json_object_add_value_string(host_attrs, "HostID", hostid);
+		subsystems = json_create_array();
+		nvme_for_each_subsystem(h, s) {
+			subsystem_attrs = json_create_object();
+			json_object_add_value_string(subsystem_attrs, "Name",
+						     nvme_subsystem_get_name(s));
+			json_object_add_value_string(subsystem_attrs, "NQN",
+						     nvme_subsystem_get_nqn(s));
+
+			json_array_add_value_object(subsystems, subsystem_attrs);
+			namespaces = json_create_array();
+
+			if (!json_subsystem_topology_multipath(s, namespaces))
+				json_print_nvme_subsystem_topology(s, namespaces);
+
+			json_object_add_value_array(subsystem_attrs, "Namespaces",
+						    namespaces);
+		}
+		json_object_add_value_array(host_attrs, "Subsystems", subsystems);
+		json_array_add_value_object(root, host_attrs);
+	}
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+/* fabrics.c */
+void json_discovery_log(struct nvmf_discovery_log *log, int numrec)
+{
+	struct json_object *root;
+	struct json_object *entries;
+	int i;
+
+	root = json_create_object();
+	entries = json_create_array();
+	json_object_add_value_uint64(root, "genctr", le64_to_cpu(log->genctr));
+	json_object_add_value_array(root, "records", entries);
+
+	for (i = 0; i < numrec; i++) {
+		struct nvmf_disc_log_entry *e = &log->entries[i];
+		struct json_object *entry = json_create_object();
+
+		json_object_add_value_string(entry, "trtype",
+					     nvmf_trtype_str(e->trtype));
+		json_object_add_value_string(entry, "adrfam",
+					     nvmf_adrfam_str(e->adrfam));
+		json_object_add_value_string(entry, "subtype",
+					     nvmf_subtype_str(e->subtype));
+		json_object_add_value_string(entry,"treq",
+					     nvmf_treq_str(e->treq));
+		json_object_add_value_uint(entry, "portid",
+					   le16_to_cpu(e->portid));
+		json_object_add_value_string(entry, "trsvcid", e->trsvcid);
+		json_object_add_value_string(entry, "subnqn", e->subnqn);
+		json_object_add_value_string(entry, "traddr", e->traddr);
+		json_object_add_value_string(entry, "eflags",
+					     nvmf_eflags_str(le16_to_cpu(e->eflags)));
+
+		switch (e->trtype) {
+		case NVMF_TRTYPE_RDMA:
+			json_object_add_value_string(entry, "rdma_prtype",
+				nvmf_prtype_str(e->tsas.rdma.prtype));
+			json_object_add_value_string(entry, "rdma_qptype",
+				nvmf_qptype_str(e->tsas.rdma.qptype));
+			json_object_add_value_string(entry, "rdma_cms",
+				nvmf_cms_str(e->tsas.rdma.cms));
+			json_object_add_value_uint(entry, "rdma_pkey",
+				le16_to_cpu(e->tsas.rdma.pkey));
+			break;
+		case NVMF_TRTYPE_TCP:
+			json_object_add_value_string(entry, "sectype",
+				nvmf_sectype_str(e->tsas.tcp.sectype));
+			break;
+		}
+		json_array_add_value_object(entries, entry);
+	}
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_connect_msg(nvme_ctrl_t c)
+{
+	struct json_object *root;
+
+	root = json_create_object();
+	json_object_add_value_string(root, "device", nvme_ctrl_get_name(c));
+
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+static void json_output_object(struct json_object *root)
+{
+	json_print_object(root, NULL);
+	printf("\n");
+	json_free_object(root);
+}
+
+void json_output_status(int status)
+{
+	struct json_object *root = json_create_object();
+	int val;
+	int type;
+
+	if (status < 0) {
+		json_object_add_value_string(root, "error", nvme_strerror(errno));
+		return json_output_object(root);
+	}
+
+	val = nvme_status_get_value(status);
+	type = nvme_status_get_type(status);
+
+	switch (type) {
+	case NVME_STATUS_TYPE_NVME:
+		json_object_add_value_string(root, "error", nvme_status_to_string(val, false));
+		json_object_add_value_string(root, "type", "nvme");
+		break;
+	case NVME_STATUS_TYPE_MI:
+		json_object_add_value_string(root, "error", nvme_mi_status_to_string(val));
+		json_object_add_value_string(root, "type", "nvme-mi");
+		break;
+	default:
+		json_object_add_value_string(root, "type", "unknow");
+		break;
+	}
+
+	json_object_add_value_int(root, "value", val);
+
+	json_output_object(root);
+}