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// SPDX-License-Identifier: GPL-2.0

/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2012, 2017, Intel Corporation.
 */

/*
 * This file is part of Lustre, http://www.lustre.org/
 *
 * Author: Liang Zhen <liangzhen@clusterfs.com>
 */

#include <errno.h>
#include <getopt.h>
#include <inttypes.h>
#include <pwd.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <time.h>
#include <linux/types.h>

#include <libcfs/util/list.h>
#include <libcfs/util/ioctl.h>
#include <libcfs/util/parser.h>
#include <linux/lnet/lnetctl.h>
#include <linux/lnet/lnetst.h>
#include <linux/lnet/nidstr.h>
#include "lnetconfig/liblnetconfig.h"

static int lst_print_usage(char *cmd);

static int lst_info_batch_ioctl(char *batch, int test, int server,
		       struct lstcon_test_batch_ent *entp, int *idxp,
		       int *ndentp, struct lstcon_node_ent *dentsp);
static int lst_info_group_ioctl(char *name, struct lstcon_ndlist_ent *gent,
			int *idx, int *count, struct lstcon_node_ent *dents);
static int lst_query_batch_ioctl(char *batch, int test, int server,
			 int timeout, struct list_head *head);

struct lst_sid LST_INVALID_SID = { .ses_nid = LNET_NID_ANY, .ses_stamp = -1 };
static unsigned int session_key;

/* All nodes running 2.6.50 or later understand feature LST_FEAT_BULK_LEN */
static unsigned int session_features = LST_FEATS_MASK;
static struct lstcon_trans_stat	trans_stat;

typedef struct list_string {
	struct list_string *lstr_next;
	int                 lstr_sz;
	char                lstr_str[];
} lstr_t;

#ifndef offsetof
# define offsetof(typ, memb)     ((unsigned long)((char *)&(((typ *)0)->memb)))
#endif

static int alloc_count;
static int alloc_nob;

static lstr_t *
alloc_lstr(int sz)
{
	lstr_t  *lstr = malloc(offsetof(lstr_t, lstr_str[sz]));

	if (lstr == NULL) {
		fprintf(stderr, "Can't allocate lstr\n");
		abort();
	}

	alloc_nob += sz;
	alloc_count++;

	lstr->lstr_str[0] = 0;
	lstr->lstr_sz = sz;
	return lstr;
}

static void
free_lstr(lstr_t *lstr)
{
	alloc_count--;
	alloc_nob -= lstr->lstr_sz;
	free(lstr);
}

static void
new_lstrs(lstr_t **list, char *prefix, char *postfix,
	  int lo, int hi, int stride)
{
	int n1 = strlen(prefix);
	int n2 = strlen(postfix);
	int sz = n1 + 20 + n2 + 1;

	do {
		lstr_t *n = alloc_lstr(sz);

		snprintf(n->lstr_str, sz - 1, "%s%u%s", prefix, lo, postfix);

		n->lstr_next = *list;
		*list = n;

		lo += stride;
	} while (lo <= hi);
}

static int
expand_lstr(lstr_t **list, lstr_t *l)
{
	int nob = strlen(l->lstr_str);
	char *b1, *b2, *expr, *sep;
	int x, y, z, n;

	b1 = strchr(l->lstr_str, '[');
	if (b1 == NULL) {
		l->lstr_next = *list;
		*list = l;
		return 0;
	}

	b2 = strchr(b1, ']');
	if (b2 == NULL || b2 == b1 + 1)
		return -1;

	*b1++ = 0;
	*b2++ = 0;
	expr = b1;
	do {
		sep = strchr(expr, ',');
		if (sep != NULL)
			*sep++ = 0;

		nob = strlen(expr);
		n = nob;
		if (sscanf(expr, "%u%n", &x, &n) >= 1 && n == nob) {
			/* simple number */
			new_lstrs(list, l->lstr_str, b2, x, x, 1);
			continue;
		}

		n = nob;
		if (sscanf(expr, "%u-%u%n", &x, &y, &n) >= 2 && n == nob &&
		    x < y) {
			/* simple range */
			new_lstrs(list, l->lstr_str, b2, x, y, 1);
			continue;
		}

		n = nob;
		if (sscanf(expr, "%u-%u/%u%n", &x, &y, &z, &n) >= 3 &&
		    n == nob && x < y) {
			/* strided range */
			new_lstrs(list, l->lstr_str, b2, x, y, z);
			continue;
		}

		/* syntax error */
		return -1;
	} while ((expr = sep) != NULL);

	free_lstr(l);

	return 1;
}

static int
expand_strs(char *str, lstr_t **head)
{
	lstr_t *list = NULL;
	lstr_t *nlist;
	lstr_t *l;
	int rc = 0;
	int expanded;

	l = alloc_lstr(strlen(str) + 1);
	memcpy(l->lstr_str, str, strlen(str) + 1);
	l->lstr_next = NULL;
	list = l;

	do {
		expanded = 0;
		nlist = NULL;

		while ((l = list) != NULL) {
			list = l->lstr_next;

			rc = expand_lstr(&nlist, l);
			if (rc < 0) {
				fprintf(stderr, "Syntax error in \"%s\"\n",
					str);
				free_lstr(l);
				break;
			}

			expanded |= rc > 0;
		}

		/* re-order onto 'list' */
		while ((l = nlist) != NULL) {
			nlist = l->lstr_next;
			l->lstr_next = list;
			list = l;
		}

	} while (expanded && rc > 0);

	if (rc >= 0) {
		*head = list;
		return 0;
	}

	while ((l = list) != NULL) {
		list = l->lstr_next;

		free_lstr(l);
	}
	return rc;
}

static int
lst_parse_nids(char *str, int *countp, struct lnet_process_id **idspp)
{
	lstr_t *head = NULL;
	lstr_t *l;
	int c = 0;
	int i;
	int rc;

	rc = expand_strs(str, &head);
	if (rc != 0)
		goto out;

	l = head;
	while (l != NULL) {
		l = l->lstr_next;
		c++;
	}

	*idspp = malloc(c * sizeof(struct lnet_process_id));
	if (*idspp == NULL) {
		fprintf(stderr, "Out of memory\n");
		rc = -1;
	}

	*countp = c;
out:
	i = 0;
	while ((l = head) != NULL) {
		head = l->lstr_next;

		if (rc == 0) {
			(*idspp)[i].nid = libcfs_str2nid(l->lstr_str);
			if ((*idspp)[i].nid == LNET_NID_ANY) {
				fprintf(stderr, "Invalid nid: %s\n",
					l->lstr_str);
				rc = -1;
			}

			(*idspp)[i].pid = LNET_PID_LUSTRE;
			i++;
		}

		free_lstr(l);
	}

	if (rc == 0)
		return 0;

	free(*idspp);
	*idspp = NULL;

	return rc;
}

static char *
lst_node_state2str(int state)
{
	if (state == LST_NODE_ACTIVE)
		return "Active";
	if (state == LST_NODE_BUSY)
		return "Busy";
	if (state == LST_NODE_DOWN)
		return "Down";

	return "Unknown";
}

static int
lst_node_str2state(char *str)
{
	if (strcasecmp(str, "active") == 0)
		return LST_NODE_ACTIVE;
	if (strcasecmp(str, "busy") == 0)
		return LST_NODE_BUSY;
	if (strcasecmp(str, "down") == 0)
		return LST_NODE_DOWN;
	if (strcasecmp(str, "unknown") == 0)
		return LST_NODE_UNKNOWN;
	if (strcasecmp(str, "invalid") == 0)
		return (LST_NODE_UNKNOWN | LST_NODE_DOWN | LST_NODE_BUSY);

	return -1;
}

static char *
lst_test_type2name(int type)
{
	if (type == LST_TEST_PING)
		return "ping";
	if (type == LST_TEST_BULK)
		return "brw";

	return "unknown";
}

static int
lst_test_name2type(char *name)
{
	if (strcasecmp(name, "ping") == 0)
		return LST_TEST_PING;
	if (strcasecmp(name, "brw") == 0)
		return LST_TEST_BULK;

	return -1;
}

static void
lst_print_error(char *sub, const char *def_format, ...)
{
	va_list ap;

	/* local error returned from kernel */
	switch (errno) {
	case ESRCH:
		fprintf(stderr, "No session exists\n");
		return;
	case ESHUTDOWN:
		fprintf(stderr, "Session is shutting down\n");
		return;
	case EACCES:
		fprintf(stderr, "Unmatched session key or not root\n");
		return;
	case ENOENT:
		fprintf(stderr, "Can't find %s in current session\n", sub);
		return;
	case EINVAL:
		fprintf(stderr, "Invalid parameters list in command line\n");
		return;
	case EFAULT:
		fprintf(stderr, "Bad parameter address\n");
		return;
	case EEXIST:
		fprintf(stderr, "%s already exists\n", sub);
		return;
	default:
		va_start(ap, def_format);
		vfprintf(stderr, def_format, ap);
		va_end(ap);

		return;
	}
}

static void
lst_free_rpcent(struct list_head *head)
{
	struct lstcon_rpc_ent *ent;

	while (!list_empty(head)) {
		ent = list_first_entry(head, struct lstcon_rpc_ent, rpe_link);

		list_del(&ent->rpe_link);
		free(ent);
	}
}

static void
lst_reset_rpcent(struct list_head *head)
{
	struct lstcon_rpc_ent *ent;

	list_for_each_entry(ent, head, rpe_link) {
		ent->rpe_sid       = LST_INVALID_SID;
		ent->rpe_peer.nid  = LNET_NID_ANY;
		ent->rpe_peer.pid  = LNET_PID_ANY;
		ent->rpe_rpc_errno = ent->rpe_fwk_errno = 0;
	}
}

static int
lst_alloc_rpcent(struct list_head *head, int count, int offset)
{
	struct lstcon_rpc_ent *ent;
	int i;

	for (i = 0; i < count; i++) {
		ent = malloc(offsetof(struct lstcon_rpc_ent,
				      rpe_payload[offset]));
		if (ent == NULL) {
			lst_free_rpcent(head);
			return -1;
		}

		memset(ent, 0, offsetof(struct lstcon_rpc_ent,
					rpe_payload[offset]));

		ent->rpe_sid      = LST_INVALID_SID;
		ent->rpe_peer.nid = LNET_NID_ANY;
		ent->rpe_peer.pid = LNET_PID_ANY;
		list_add(&ent->rpe_link, head);
	}

	return 0;
}

static void
lst_print_transerr(struct list_head *head, char *optstr)
{
	struct lstcon_rpc_ent *ent;

	list_for_each_entry(ent, head, rpe_link) {
		if (ent->rpe_rpc_errno == 0 && ent->rpe_fwk_errno == 0)
			continue;

		if (ent->rpe_rpc_errno != 0) {
			fprintf(stderr, "%s RPC failed on %s: %s\n",
				optstr, libcfs_id2str(ent->rpe_peer),
				strerror(ent->rpe_rpc_errno));
			continue;
		}

		fprintf(stderr, "operation %s failed on %s: %s\n",
			optstr, libcfs_id2str(ent->rpe_peer),
			strerror(ent->rpe_fwk_errno));
	}
}

static int
lst_ioctl(unsigned int opc, void *buf, int len)
{
	struct libcfs_ioctl_data data;
	int rc;

	LIBCFS_IOC_INIT(data);
	data.ioc_u32[0]  = opc;
	data.ioc_plen1   = len;
	data.ioc_pbuf1   = (char *)buf;
	data.ioc_plen2   = sizeof(trans_stat);
	data.ioc_pbuf2   = (char *)&trans_stat;

	memset(&trans_stat, 0, sizeof(trans_stat));

	rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_LNETST, &data);

	/* local error, no valid RPC result */
	if (rc != 0)
		return -1;

	/* RPC error */
	if (trans_stat.trs_rpc_errno != 0)
		return -2;

	/* Framework error */
	if (trans_stat.trs_fwk_errno != 0)
		return -3;

	return 0;
}

static int lst_yaml_session(const char *label, const char *timeout, int nlflags,
			    const char *errmsg)
{
	struct lstcon_ndlist_ent ndinfo = { };
	struct lst_sid sid = LST_INVALID_SID;
	/* nlflags being zero means we are destroying the session.
	 * No parsing of reply needed.
	 */
	bool done = nlflags ? false : true;
	char nid[LNET_NIDSTR_SIZE];
	char name[LST_NAME_SIZE];
	unsigned int key = 0;
	yaml_emitter_t request;
	yaml_parser_t reply;
	yaml_event_t event;
	struct nl_sock *sk;
	int rc;

	sk = nl_socket_alloc();
	if (!sk)
		return -1;

	/* Note: NL_AUTO_PID == zero which we use by default for the
	 * session_key when creating a new session. This is considered
	 * an invalid key so we need to get the real session key from
	 * the yaml parser yet to be created. If the user did request
	 * a specific session key then set the socket's port id to this
	 * value.
	 */
	if (session_key)
		nl_socket_set_local_port(sk, session_key);

	/* Setup reply parser to recieve Netlink packets */
	rc = yaml_parser_initialize(&reply);
	if (rc == 0) {
		nl_socket_free(sk);
		return -1;
	}

	rc = yaml_parser_set_input_netlink(&reply, sk, false);
	if (rc == 0)
		goto parser_error;

	/* Create Netlink emitter to send request to kernel */
	yaml_emitter_initialize(&request);
	rc = yaml_emitter_set_output_netlink(&request, sk,
					     LNET_SELFTEST_GENL_NAME,
					     LNET_SELFTEST_GENL_VERSION,
					     LNET_SELFTEST_CMD_SESSIONS,
					     nlflags);
	if (rc == 0)
		goto emitter_error;

	yaml_emitter_open(&request);
	yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_mapping_start_event_initialize(&event, NULL,
					    (yaml_char_t *)YAML_MAP_TAG,
					    1, YAML_BLOCK_MAPPING_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_scalar_event_initialize(&event, NULL,
				     (yaml_char_t *)YAML_STR_TAG,
				     (yaml_char_t *)"sessions",
				     strlen("sessions"), 1, 0,
				     YAML_PLAIN_SCALAR_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	if (!label) {
		yaml_scalar_event_initialize(&event, NULL,
					     (yaml_char_t *)YAML_STR_TAG,
					     (yaml_char_t *)"",
					     strlen(""), 1, 0,
					     YAML_PLAIN_SCALAR_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;
		goto skip_params;
	}

	/* sessions: { name: 'name', timeout: 300 }
	 * or
	 * sessions:
	 *   name: 'name'
	 *   timeout: 300
	 */
	yaml_mapping_start_event_initialize(&event, NULL,
					    (yaml_char_t *)YAML_MAP_TAG,
					    1, YAML_FLOW_MAPPING_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_scalar_event_initialize(&event, NULL,
				     (yaml_char_t *)YAML_STR_TAG,
				     (yaml_char_t *)"name",
				     strlen("name"), 1, 0,
				     YAML_PLAIN_SCALAR_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_scalar_event_initialize(&event, NULL,
				     (yaml_char_t *)YAML_STR_TAG,
				     (yaml_char_t *)label,
				     strlen(label), 1, 0,
				     YAML_PLAIN_SCALAR_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	if (timeout) {
		yaml_scalar_event_initialize(&event, NULL,
					     (yaml_char_t *)YAML_STR_TAG,
					     (yaml_char_t *)"timeout",
					     strlen("timeout"), 1, 0,
					     YAML_PLAIN_SCALAR_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;

		yaml_scalar_event_initialize(&event, NULL,
					     (yaml_char_t *)YAML_STR_TAG,
					     (yaml_char_t *)timeout,
					     strlen(timeout), 1, 0,
					     YAML_PLAIN_SCALAR_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;
	}

	yaml_mapping_end_event_initialize(&event);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

skip_params:
	yaml_mapping_end_event_initialize(&event);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_document_end_event_initialize(&event, 0);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	rc = yaml_emitter_close(&request);
	if (rc == 0) {
emitter_error:
		yaml_emitter_log_error(&request, stderr);
		yaml_emitter_cleanup(&request);
		errmsg = NULL;
		goto parser_error;
	}
	yaml_emitter_cleanup(&request);

	while (!done) {
		rc = yaml_parser_parse(&reply, &event);
		if (rc == 0)
			goto parser_error;

		if (event.type == YAML_SCALAR_EVENT) {
			char *tmp, *endp = NULL;

			if (strcmp((char *)event.data.scalar.value,
				   "name") == 0) {
				yaml_event_delete(&event);
				rc = yaml_parser_parse(&reply, &event);
				if (rc == 0)
					goto parser_error;

				strncpy(name, (char *)event.data.scalar.value,
					sizeof(name) - 1);
			}

			if (strcmp((char *)event.data.scalar.value,
				   "key") == 0) {
				yaml_event_delete(&event);
				rc = yaml_parser_parse(&reply, &event);
				if (rc == 0)
					goto parser_error;

				tmp = (char *)event.data.scalar.value;
				key = strtoul(tmp, &endp, 10);
				if (endp == tmp)
					goto parser_error;
			}

			if (strcmp((char *)event.data.scalar.value,
				   "timestamp") == 0) {
				yaml_event_delete(&event);
				rc = yaml_parser_parse(&reply, &event);
				if (rc == 0)
					goto parser_error;

				tmp = (char *)event.data.scalar.value;
				sid.ses_stamp = strtoll(tmp, &endp, 10);
				if (endp == tmp)
					goto parser_error;
			}

			if (strcmp((char *)event.data.scalar.value,
				   "nid") == 0) {
				yaml_event_delete(&event);
				rc = yaml_parser_parse(&reply, &event);
				if (rc == 0)
					goto parser_error;

				strncpy(nid, (char *)event.data.scalar.value,
					sizeof(nid) - 1);
			}

			if (strcmp((char *)event.data.scalar.value,
				   "nodes") == 0) {
				yaml_event_delete(&event);
				rc = yaml_parser_parse(&reply, &event);
				if (rc == 0)
					goto parser_error;

				tmp = (char *)event.data.scalar.value;
				ndinfo.nle_nnode = strtoul(tmp, &endp, 10);
				if (endp == tmp)
					goto parser_error;
			}
		}

		done = (event.type == YAML_STREAM_END_EVENT);

		yaml_event_delete(&event);
	}

	if (nlflags & NLM_F_CREATE) {
		session_features = yaml_parser_get_reader_proto_version(&reply);
		session_key = key;
	}
parser_error:
	if (rc == 0 && errmsg)
		yaml_parser_log_error(&reply, stderr, errmsg);
	yaml_parser_cleanup(&reply);
	nl_socket_free(sk);

	if (((nlflags & NLM_F_DUMP) == NLM_F_DUMP) && rc != 0) {
		fprintf(stdout,
			"%s ID: %ju@%s, KEY: %u FEATURES: %x NODES: %d\n",
			name, (uintmax_t)sid.ses_stamp, nid,
			key, session_features, ndinfo.nle_nnode);
	}

	return rc == 0 ? -1 : 0;
}

static int
lst_new_session_ioctl(char *name, int timeout, int force, struct lst_sid *sid)
{
	struct lstio_session_new_args args = { 0 };

	args.lstio_ses_key     = session_key;
	args.lstio_ses_timeout = timeout;
	args.lstio_ses_force   = force;
	args.lstio_ses_idp     = sid;
	args.lstio_ses_feats   = session_features;
	args.lstio_ses_nmlen   = strlen(name);
	args.lstio_ses_namep   = name;

	return lst_ioctl(LSTIO_SESSION_NEW, &args, sizeof(args));
}

static int
jt_lst_new_session(int argc, char **argv)
{
	char buf[LST_NAME_SIZE * 2 + 1];
	char *name, *timeout_s = NULL;
	int nlflags = NLM_F_CREATE;
	struct lst_sid session_id;
	int optidx = 0;
	int timeout = 300;
	int force = 0;
	int c;
	int rc;

	static const struct option session_opts[] = {
		{ .name = "timeout", .has_arg = required_argument, .val = 't' },
		{ .name = "force",   .has_arg = no_argument,	   .val = 'f' },
		{ .name = NULL } };

	while (1) {
		c = getopt_long(argc, argv, "ft:",
				session_opts, &optidx);
		if (c == -1)
			break;

		switch (c) {
		case 'f':
			nlflags |= NLM_F_REPLACE;
			force = 1;
			break;
		case 't':
			timeout_s = optarg;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (timeout_s) {
		timeout = atoi(timeout_s);
		if (timeout <= 0) {
			fprintf(stderr, "Invalid timeout value\n");
			return -1;
		}
	}

	if (optind == argc - 1) {
		name = argv[optind++];
		if (strlen(name) >= LST_NAME_SIZE) {
			fprintf(stderr, "Name size is limited to %d\n",
				LST_NAME_SIZE - 1);
			return -1;
		}
	} else if (optind == argc) {
		char user[LST_NAME_SIZE];
		char host[LST_NAME_SIZE];
		struct passwd *pw = getpwuid(getuid());

		if (pw == NULL)
			snprintf(user, sizeof(user), "%d", (int)getuid());
		else
			snprintf(user, sizeof(user), "%s", pw->pw_name);

		rc = gethostname(host, sizeof(host));
		if (rc != 0)
			snprintf(host, sizeof(host), "unknown_host");

		snprintf(buf, sizeof(buf), "%s@%s", user, host);
		name = buf;
	} else {
		return lst_print_usage(argv[0]);
	}

	rc = lst_yaml_session(name, timeout_s, nlflags, "new session");
	if (rc == 0)
		goto success;

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	rc = lst_new_session_ioctl(name, timeout, force, &session_id);
	if (rc != 0) {
		lst_print_error("session", "Failed to create session: %s\n",
				strerror(errno));
		return rc;
	}
success:
	fprintf(stdout, "SESSION: %s FEATURES: %x TIMEOUT: %d FORCE: %s\n",
		name, session_features, timeout, force ? "Yes" : "No");
	return 0;
}

static int
lst_session_info_ioctl(char *name, int len, int *key, unsigned int *featp,
		       struct lst_sid *sid, struct lstcon_ndlist_ent *ndinfo)
{
	struct lstio_session_info_args args = { 0 };

	args.lstio_ses_idp     = sid;
	args.lstio_ses_keyp    = key;
	args.lstio_ses_featp   = featp;
	args.lstio_ses_ndinfo  = ndinfo;
	args.lstio_ses_nmlen   = len;
	args.lstio_ses_namep   = name;

	return lst_ioctl(LSTIO_SESSION_INFO, &args, sizeof(args));
}

static int
jt_lst_show_session(int argc, char **argv)
{
	struct lstcon_ndlist_ent ndinfo;
	struct lst_sid sid;
	char name[LST_NAME_SIZE];
	unsigned int feats;
	int key;
	int rc;

	rc = lst_yaml_session(NULL, NULL, NLM_F_DUMP, "show session");
	if (rc == 0)
		return 0;

	rc = lst_session_info_ioctl(name, sizeof(name), &key,
				    &feats, &sid, &ndinfo);

	if (rc != 0) {
		lst_print_error("session", "Failed to show session: %s\n",
				strerror(errno));
		return -1;
	}

	fprintf(stdout, "%s ID: %ju@%s, KEY: %d FEATURES: %x NODES: %d\n",
		name, (uintmax_t)sid.ses_stamp, libcfs_nid2str(sid.ses_nid),
		key, feats, ndinfo.nle_nnode);

	return 0;
}

static int
lst_end_session_ioctl(void)
{
	struct lstio_session_end_args args = { 0 };

	args.lstio_ses_key = session_key;
	return lst_ioctl(LSTIO_SESSION_END, &args, sizeof(args));
}

static int
jt_lst_end_session(int argc, char **argv)
{
	int rc;

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	rc = lst_yaml_session(NULL, NULL, 0, "end session");
	if (rc == 0)
		goto finish;

	rc = lst_end_session_ioctl();

	if (rc == 0) {
		fprintf(stdout, "session is ended\n");
		return 0;
	}

	if (rc == -1) {
		lst_print_error("session", "Failed to end session: %s\n",
				strerror(errno));
		return rc;
	}
finish:
	if (trans_stat.trs_rpc_errno != 0) {
		fprintf(stderr,
			"[RPC] Failed to send %d session RPCs: %s\n",
			lstcon_rpc_stat_failure(&trans_stat, 0),
			strerror(trans_stat.trs_rpc_errno));
	}

	if (trans_stat.trs_fwk_errno != 0) {
		fprintf(stderr,
			"[FWK] Failed to end session on %d nodes: %s\n",
			lstcon_sesop_stat_failure(&trans_stat, 0),
			strerror(trans_stat.trs_fwk_errno));
	}

	return rc;
}

#define LST_NODES_TITLE "\tACTIVE\tBUSY\tDOWN\tUNKNOWN\tTOTAL\n"

static int lst_yaml_display_groups(yaml_parser_t *reply, char *group,
				   int states, bool print)
{
	yaml_event_t event;
	int rc;

	if (states) {
		char name[LST_NAME_SIZE] = {};
		bool done = false;
		int count = 0;

		if (print)
			fprintf(stdout, LST_NODES_TITLE);

		while (!done) {
			rc = yaml_parser_parse(reply, &event);
			if (rc == 0)
				goto parser_error;

			if (event.type == YAML_MAPPING_START_EVENT) {
				char *value = NULL;
				yaml_event_t next;

				rc = yaml_parser_parse(reply, &next);
				if (rc == 0)
					goto parser_error;

				if (next.type != YAML_SCALAR_EVENT) {
					yaml_event_delete(&next);
					continue;
				}

				value = (char *)next.data.scalar.value;
				if (strcmp(value, "groups") == 0) {
					yaml_event_delete(&next);
				} else if (strcmp(value, "nid") == 0) {
					yaml_event_t next;
					char *tmp;

					rc = yaml_parser_parse(reply, &next);
					if (rc == 0)
						goto parser_error;

					fprintf(stdout, "\t%s: ",
						(char *)next.data.scalar.value);

					rc = yaml_parser_parse(reply, &next);
					if (rc == 0)
						goto parser_error;

					tmp = (char *)next.data.scalar.value;
					if (strcmp(tmp, "status") == 0) {
						yaml_event_t state;

						rc = yaml_parser_parse(reply,
								       &state);
						if (rc == 0)
							goto parser_error;

						fprintf(stdout, "%s\n",
							(char *)state.data.scalar.value);
						count++;
					}
				} else {
					yaml_event_t next;

					rc = yaml_parser_parse(reply, &next);
					if (rc == 0)
						goto parser_error;

					strncpy(name, value, sizeof(name) - 1);
					fprintf(stdout, "Group [ %s ]\n", name);
					count = 0;

					if (next.type !=
					    YAML_SEQUENCE_START_EVENT) {
						fprintf(stdout,
							"No nodes found [ %s ]\n",
							name);
					}
				}
			} else if (event.type == YAML_SEQUENCE_END_EVENT &&
				   count) {
				fprintf(stdout, "Total %d nodes [ %s ]\n",
					count, name);
				count = 0;
			}

			done = (event.type == YAML_STREAM_END_EVENT);
			yaml_event_delete(&event);
		}
	} else if (group) {
		int active = 0, busy = 0, down = 0, unknown = 0;
		char group[LST_NAME_SIZE];
		bool done = false;

		while (!done) {
			rc = yaml_parser_parse(reply, &event);
			if (rc == 0)
				goto parser_error;

			if (event.type == YAML_SCALAR_EVENT) {
				char *value = (char *)event.data.scalar.value;
				yaml_event_t next;

				value = (char *)event.data.scalar.value;
				if (strcmp(value, "groups") == 0) {
					yaml_event_delete(&event);
					continue;
				}

				rc = yaml_parser_parse(reply, &next);
				if (rc == 0)
					goto parser_error;

				if (next.type == YAML_SCALAR_EVENT) {
					int status;

					status = lst_node_str2state((char *)next.data.scalar.value);
					switch (status) {
					case LST_NODE_ACTIVE:
						active++;
						break;
					case LST_NODE_BUSY:
						busy++;
						break;
					case LST_NODE_DOWN:
						down++;
						break;
					case LST_NODE_UNKNOWN:
						unknown++;
					default:
						break;
					}
				} else if (next.type == YAML_SEQUENCE_START_EVENT) {
					strncpy(group, value,
						sizeof(group) - 1);
					active = 0;
					busy = 0;
					down = 0;
					unknown = 0;
				}
				yaml_event_delete(&next);
			} else if (event.type == YAML_SEQUENCE_END_EVENT) {
				if (strlen(group)) {
					fprintf(stdout, "\t%d\t%d\t%d\t%d\t%d\t%s\n",
						active, busy, down, unknown,
						active + busy + down + unknown,
						group);
				}
				memset(group, 0, sizeof(group));
			}
			done = (event.type == YAML_STREAM_END_EVENT);
			yaml_event_delete(&event);
		}
	} else {
		bool done = false;
		unsigned int i = 1;

		while (!done) {
			rc = yaml_parser_parse(reply, &event);
			if (rc == 0)
				goto parser_error;

			if (event.type == YAML_SCALAR_EVENT) {
				char *value;

				value = (char *)event.data.scalar.value;
				if (strlen(value) &&
				    strcmp(value, "groups") != 0) {
					if (print)
						fprintf(stdout, "%d) %s\n",
							i, value);
					i++;
				}
			}
			done = (event.type == YAML_STREAM_END_EVENT);

			yaml_event_delete(&event);
		}
		if (print)
			fprintf(stdout, "Total %d groups\n", i - 1);
		else
			rc = i - 1;
	}
parser_error:
	return rc;
}

#define LST_NODES_TITLE "\tACTIVE\tBUSY\tDOWN\tUNKNOWN\tTOTAL\n"

static int lst_yaml_groups(int nlflags, char *name, int states, bool print)
{
	yaml_emitter_t request;
	yaml_parser_t reply;
	yaml_event_t event;
	struct nl_sock *sk;
	int rc;

	sk = nl_socket_alloc();
	if (!sk)
		return -EOPNOTSUPP;

	/* Setup reply parser to recieve Netlink packets */
	rc = yaml_parser_initialize(&reply);
	if (rc == 0) {
		nl_socket_free(sk);
		return -EOPNOTSUPP;
	}

	rc = yaml_parser_set_input_netlink(&reply, sk, false);
	if (rc == 0)
		goto parser_error;

	/* Create Netlink emitter to send request to kernel */
	yaml_emitter_initialize(&request);
	rc = yaml_emitter_set_output_netlink(&request, sk,
					     LNET_SELFTEST_GENL_NAME,
					     LNET_SELFTEST_GENL_VERSION,
					     LNET_SELFTEST_CMD_GROUPS,
					     nlflags);
	if (rc == 0)
		goto emitter_error;

	yaml_emitter_open(&request);
	yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_mapping_start_event_initialize(&event, NULL,
					    (yaml_char_t *)YAML_MAP_TAG,
					    1, YAML_BLOCK_MAPPING_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_scalar_event_initialize(&event, NULL,
				     (yaml_char_t *)YAML_STR_TAG,
				     (yaml_char_t *)"groups",
				     strlen("groups"), 1, 0,
				     YAML_PLAIN_SCALAR_STYLE);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	if (name) {
		yaml_sequence_start_event_initialize(&event, NULL,
						     (yaml_char_t *)YAML_SEQ_TAG,
						     1, YAML_BLOCK_SEQUENCE_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;

		yaml_mapping_start_event_initialize(&event, NULL,
						    (yaml_char_t *)YAML_MAP_TAG,
						    1, YAML_BLOCK_MAPPING_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;

		yaml_scalar_event_initialize(&event, NULL,
					     (yaml_char_t *)YAML_STR_TAG,
					     (yaml_char_t *)name,
					     strlen(name), 1, 0,
					     YAML_PLAIN_SCALAR_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;

		if (states) {
			int max = ffs(LST_NODE_UNKNOWN) + 1, i;
			char *state;

			yaml_sequence_start_event_initialize(&event, NULL,
							     (yaml_char_t *)YAML_SEQ_TAG,
							     1, YAML_BLOCK_SEQUENCE_STYLE);
			rc = yaml_emitter_emit(&request, &event);
			if (rc == 0)
				goto emitter_error;


			for (i = 0; i < max; i++) {
				int mask = states & (1 << i);

				state = lst_node_state2str(mask);
				if (mask != LST_NODE_UNKNOWN && strcmp(state, "Unknown") == 0)
					continue;

				yaml_mapping_start_event_initialize(&event, NULL,
								    (yaml_char_t *)YAML_MAP_TAG,
								    1, YAML_BLOCK_MAPPING_STYLE);
				rc = yaml_emitter_emit(&request, &event);
				if (rc == 0)
					goto emitter_error;

				yaml_scalar_event_initialize(&event, NULL,
							     (yaml_char_t *)YAML_STR_TAG,
							     (yaml_char_t *)"status",
							     strlen("status"), 1, 0,
							     YAML_PLAIN_SCALAR_STYLE);
				rc = yaml_emitter_emit(&request, &event);
				if (rc == 0)
					goto emitter_error;

				yaml_scalar_event_initialize(&event, NULL,
							     (yaml_char_t *)YAML_STR_TAG,
							     (yaml_char_t *)state,
							     strlen(state), 1, 0,
							     YAML_PLAIN_SCALAR_STYLE);
				rc = yaml_emitter_emit(&request, &event);
				if (rc == 0)
					goto emitter_error;

				yaml_mapping_end_event_initialize(&event);
				rc = yaml_emitter_emit(&request, &event);
				if (rc == 0)
					goto emitter_error;
			}

			yaml_sequence_end_event_initialize(&event);
			rc = yaml_emitter_emit(&request, &event);
			if (rc == 0)
				goto emitter_error;
		} else {
			yaml_scalar_event_initialize(&event, NULL,
						     (yaml_char_t *)YAML_STR_TAG,
						     (yaml_char_t *)"",
						     strlen(""), 1, 0,
						     YAML_PLAIN_SCALAR_STYLE);
			rc = yaml_emitter_emit(&request, &event);
			if (rc == 0)
				goto emitter_error;
		}

		yaml_mapping_end_event_initialize(&event);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;

		yaml_sequence_end_event_initialize(&event);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;
	} else {
		yaml_scalar_event_initialize(&event, NULL,
					     (yaml_char_t *)YAML_STR_TAG,
					     (yaml_char_t *)"",
					     strlen(""), 1, 0,
					     YAML_PLAIN_SCALAR_STYLE);
		rc = yaml_emitter_emit(&request, &event);
		if (rc == 0)
			goto emitter_error;
	}
	yaml_mapping_end_event_initialize(&event);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	yaml_document_end_event_initialize(&event, 0);
	rc = yaml_emitter_emit(&request, &event);
	if (rc == 0)
		goto emitter_error;

	rc = yaml_emitter_close(&request);
	if (rc == 0) {
emitter_error:
		yaml_emitter_log_error(&request, stderr);
		yaml_emitter_cleanup(&request);
		rc = -EINVAL;
		goto parser_error;
	}
	yaml_emitter_cleanup(&request);

	/* display output */
	if (nlflags == NLM_F_DUMP)
		rc = lst_yaml_display_groups(&reply, name, states, print);
parser_error:
	if (rc == 0)
		yaml_parser_log_error(&reply, stderr, NULL);
	yaml_parser_delete(&reply);
	nl_socket_free(sk);

	if (print)
		rc = rc == 1 ? 0 : -EINVAL;

	return rc;
}

static int
lst_ping_ioctl(char *str, int type, int timeout,
	       int count, struct lnet_process_id *ids, struct list_head *head)
{
	struct lstio_debug_args args = { 0 };

	args.lstio_dbg_key     = session_key;
	args.lstio_dbg_type    = type;
	args.lstio_dbg_flags   = 0;
	args.lstio_dbg_timeout = timeout;
	args.lstio_dbg_nmlen   = (str == NULL) ? 0 : strlen(str);
	args.lstio_dbg_namep   = str;
	args.lstio_dbg_count   = count;
	args.lstio_dbg_idsp    = ids;
	args.lstio_dbg_resultp = head;

	return lst_ioctl(LSTIO_DEBUG, &args, sizeof(args));
}

static int
lst_get_node_count(int type, char *str, int *countp,
		   struct lnet_process_id **idspp)
{
	char buf[LST_NAME_SIZE];
	struct lstcon_test_batch_ent ent = {0};
	struct lstcon_ndlist_ent *entp = &ent.tbe_cli_nle;
	struct lst_sid sid;
	unsigned int feats;
	int key, rc;

	switch (type) {
	case LST_OPC_SESSION:
		rc = lst_session_info_ioctl(buf, LST_NAME_SIZE,
					    &key, &feats, &sid, entp);
		break;

	case LST_OPC_BATCHSRV:
		entp = &ent.tbe_srv_nle;
	case LST_OPC_BATCHCLI:
		rc = lst_info_batch_ioctl(str, 0, 0, &ent, NULL, NULL, NULL);
		break;

	case LST_OPC_GROUP:
		rc = lst_yaml_groups(NLM_F_DUMP, NULL, 0, false);
		if (rc == -EOPNOTSUPP) {
			rc = lst_info_group_ioctl(str, entp, NULL, NULL, NULL);
		} else if (rc > 0) {
			entp->nle_nnode = rc;
			rc = 0;
		}
		break;

	case LST_OPC_NODES:
		rc = lst_parse_nids(str, &entp->nle_nnode, idspp) < 0 ? -1 : 0;
		break;

	default:
		rc = -1;
		break;
	}

	if (rc == 0)
		*countp = entp->nle_nnode;

	return rc;
}

static int
jt_lst_ping(int argc,  char **argv)
{
	struct list_head   head;
	struct lnet_process_id *ids = NULL;
	struct lstcon_rpc_ent  *ent = NULL;
	char *str = NULL;
	int optidx  = 0;
	int server  = 0;
	int timeout = 5;
	int count   = 0;
	int type    = 0;
	int rc      = 0;
	int c;

	static const struct option ping_opts[] = {
		{ .name = "session", .has_arg = no_argument,	   .val = 's' },
		{ .name = "server",  .has_arg = no_argument,	   .val = 'v' },
		{ .name = "batch",   .has_arg = required_argument, .val = 'b' },
		{ .name = "group",   .has_arg = required_argument, .val = 'g' },
		{ .name = "nodes",   .has_arg = required_argument, .val = 'n' },
		{ .name = "timeout", .has_arg = required_argument, .val = 't' },
		{ .name = NULL, } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {

		c = getopt_long(argc, argv, "g:b:n:t:sv", ping_opts, &optidx);
		if (c == -1)
			break;

		switch (c) {
		case 's':
			type = LST_OPC_SESSION;
			break;

		case 'g':
			type = LST_OPC_GROUP;
			str = optarg;
			break;

		case 'b':
			type = LST_OPC_BATCHCLI;
			str = optarg;
			break;

		case 'n':
			type = LST_OPC_NODES;
			str = optarg;
			break;

		case 't':
			timeout = atoi(optarg);
			break;

		case 'v':
			server = 1;
			break;

		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (type == 0 || timeout <= 0 || optind != argc)
		return lst_print_usage(argv[0]);

	if (type == LST_OPC_BATCHCLI && server)
		type = LST_OPC_BATCHSRV;

	rc = lst_get_node_count(type, str, &count, &ids);
	if (rc < 0) {
		fprintf(stderr, "Failed to get count of nodes from %s: %s\n",
			(str == NULL) ? "session" : str, strerror(errno));
		return -1;
	}

	INIT_LIST_HEAD(&head);

	rc = lst_alloc_rpcent(&head, count, LST_NAME_SIZE);
	if (rc != 0) {
		fprintf(stderr, "Out of memory\n");
		goto out;
	}

	if (count == 0) {
		fprintf(stdout, "Target %s is empty\n",
			(str == NULL) ? "session" : str);
		goto out;
	}

	rc = lst_ping_ioctl(str, type, timeout, count, ids, &head);
	if (rc == -1) { /* local failure */
		lst_print_error("debug", "Failed to ping %s: %s\n",
				(str == NULL) ? "session" : str,
				strerror(errno));
		rc = -1;
		goto out;
	}

	/* ignore RPC errors and framwork errors */
	list_for_each_entry(ent, &head, rpe_link) {
		fprintf(stdout, "\t%s: %s [session: %s id: %s]\n",
			libcfs_id2str(ent->rpe_peer),
			lst_node_state2str(ent->rpe_state),
			(ent->rpe_state == LST_NODE_ACTIVE ||
			 ent->rpe_state == LST_NODE_BUSY) ?
				(ent->rpe_rpc_errno == 0 ?
					&ent->rpe_payload[0] : "Unknown") :
				"<NULL>", libcfs_nid2str(ent->rpe_sid.ses_nid));
	}

out:
	lst_free_rpcent(&head);

	if (ids != NULL)
		free(ids);

	return rc;
}

static int
lst_add_nodes_ioctl(char *name, int count, struct lnet_process_id *ids,
		    unsigned int *featp, struct list_head *resultp)
{
	struct lstio_group_nodes_args args = { 0 };

	args.lstio_grp_key     = session_key;
	args.lstio_grp_nmlen   = strlen(name);
	args.lstio_grp_namep   = name;
	args.lstio_grp_count   = count;
	args.lstio_grp_featp   = featp;
	args.lstio_grp_idsp    = ids;
	args.lstio_grp_resultp = resultp;

	return lst_ioctl(LSTIO_NODES_ADD, &args, sizeof(args));
}

static int
lst_del_group_ioctl(char *name)
{
	struct lstio_group_del_args args = { 0 };

	args.lstio_grp_key   = session_key;
	args.lstio_grp_nmlen = strlen(name);
	args.lstio_grp_namep = name;

	return lst_ioctl(LSTIO_GROUP_DEL, &args, sizeof(args));
}

static int
lst_del_group(char *grp_name)
{
	int rc;

	rc = lst_del_group_ioctl(grp_name);
	if (rc == 0) {
		fprintf(stdout, "Group is deleted\n");
		return 0;
	}

	if (rc == -1) {
		lst_print_error("group", "Failed to delete group: %s\n",
				strerror(errno));
		return rc;
	}

	fprintf(stderr, "Group is deleted with some errors\n");

	if (trans_stat.trs_rpc_errno != 0) {
		fprintf(stderr,
			"[RPC] Failed to send %d end session RPCs: %s\n",
			lstcon_rpc_stat_failure(&trans_stat, 0),
			strerror(trans_stat.trs_rpc_errno));
	}

	if (trans_stat.trs_fwk_errno != 0) {
		fprintf(stderr,
			"[FWK] Failed to end session on %d nodes: %s\n",
		lstcon_sesop_stat_failure(&trans_stat, 0),
		strerror(trans_stat.trs_fwk_errno));
	}

	return -1;
}

static int
lst_add_group_ioctl(char *name)
{
	struct lstio_group_add_args args = { 0 };

	args.lstio_grp_key     =  session_key;
	args.lstio_grp_nmlen   =  strlen(name);
	args.lstio_grp_namep   =  name;

	return lst_ioctl(LSTIO_GROUP_ADD, &args, sizeof(args));
}

static int
jt_lst_add_group(int argc, char **argv)
{
	struct list_head head;
	struct lnet_process_id *ids;
	char *name;
	unsigned int feats = session_features;
	int count;
	int rc;
	int i;
	bool nodes_added = false;

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	if (argc < 3)
		return lst_print_usage(argv[0]);

	name = argv[1];
	if (strlen(name) >= LST_NAME_SIZE) {
		fprintf(stderr, "Name length is limited to %d\n",
			LST_NAME_SIZE - 1);
		return -1;
	}

	rc = lst_add_group_ioctl(name);
	if (rc != 0) {
		lst_print_error("group", "Failed to add group %s: %s\n",
				name, strerror(errno));
		return -1;
	}

	INIT_LIST_HEAD(&head);

	for (i = 2; i < argc; i++) {
		/* parse address list */
		rc = lst_parse_nids(argv[i], &count, &ids);
		if (rc < 0) {
			fprintf(stderr, "Ignore invalid id list %s\n",
				argv[i]);
			continue;
		}

		if (count == 0)
			continue;

		rc = lst_alloc_rpcent(&head, count, 0);
		if (rc != 0) {
			fprintf(stderr, "Out of memory\n");
			free(ids);
			rc = -1;
			goto failed;
		}

		rc = lst_add_nodes_ioctl(name, count, ids, &feats, &head);

		free(ids);

		if (rc != 0)
			goto failed;

		fprintf(stdout, "%s are added to session\n", argv[i]);

		nodes_added = true;

		if ((feats & session_features) != session_features) {
			fprintf(stdout,
				"Warning, this session will run with compatible mode because some test nodes might not understand these features: %x\n",
				(~feats & session_features));
		}

		lst_free_rpcent(&head);
	}

	if (!nodes_added) {
		/* The selftest kernel module expects that a group should
		 * have at least one node, since it doesn't make sense for
		 * an empty group to be added to a test.
		 */
		fprintf(stderr,
			"No nodes added successfully, deleting group %s\n",
			name);
		rc = lst_del_group(name);
		if (rc != 0) {
			fprintf(stderr,
				"Failed to delete group %s. Group is empty.\n",
				name);
		}
	}

	return rc;

failed:
	if (rc == -1) {
		lst_print_error("group", "Failed to add nodes %s: %s\n",
				argv[i], strerror(errno));

	} else {
		if (trans_stat.trs_fwk_errno == EPROTO) {
			fprintf(stderr,
				"test nodes might have different LST features, please disable some features by setting LST_FEATURES\n");
		}

		lst_print_transerr(&head, "create session");
	}

	lst_free_rpcent(&head);

	if (!nodes_added) {
		fprintf(stderr,
			"No nodes added successfully, deleting group %s\n",
			name);
		if (lst_del_group(name) != 0) {
			fprintf(stderr,
				"Failed to delete group %s. Group is empty.\n",
				name);
		}
	}

	return rc;
}

static int
jt_lst_del_group(int argc, char **argv)
{
	int rc;

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	if (argc != 2)
		return lst_print_usage(argv[0]);

	rc = lst_del_group(argv[1]);

	return rc;
}

static int
lst_update_group_ioctl(int opc, char *name, int clean, int count,
		       struct lnet_process_id *ids, struct list_head *resultp)
{
	struct lstio_group_update_args args = { 0 };

	args.lstio_grp_key      = session_key;
	args.lstio_grp_opc      = opc;
	args.lstio_grp_args     = clean;
	args.lstio_grp_nmlen    = strlen(name);
	args.lstio_grp_namep    = name;
	args.lstio_grp_count    = count;
	args.lstio_grp_idsp     = ids;
	args.lstio_grp_resultp  = resultp;

	return lst_ioctl(LSTIO_GROUP_UPDATE, &args, sizeof(args));
}

static int
jt_lst_update_group(int argc, char **argv)
{
	struct list_head   head;
	struct lnet_process_id *ids = NULL;
	char *str = NULL;
	char *grp = NULL;
	int optidx = 0;
	int count = 0;
	int clean = 0;
	int opc = 0;
	int rc;
	int c;

	static const struct option update_group_opts[] = {
		{ .name = "refresh", .has_arg = no_argument,	   .val = 'f' },
		{ .name = "clean",   .has_arg = required_argument, .val = 'c' },
		{ .name = "remove",  .has_arg = required_argument, .val = 'r' },
		{ .name = NULL } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "fc:r:", update_group_opts,
				&optidx);

		/* Detect the end of the options. */
		if (c == -1)
			break;

		switch (c) {
		case 'f':
			if (opc != 0)
				return lst_print_usage(argv[0]);

			opc = LST_GROUP_REFRESH;
			break;

		case 'r':
			if (opc != 0)
				return lst_print_usage(argv[0]);

			opc = LST_GROUP_RMND;
			str = optarg;
			break;

		case 'c':
			clean = lst_node_str2state(optarg);
			if (opc != 0 || clean <= 0)
				return lst_print_usage(argv[0]);

			opc = LST_GROUP_CLEAN;
			break;

		default:
			return lst_print_usage(argv[0]);
		}
	}

	/* no OPC or group is specified */
	if (opc == 0 || optind != argc - 1)
		return lst_print_usage(argv[0]);

	grp = argv[optind];

	INIT_LIST_HEAD(&head);

	if (opc == LST_GROUP_RMND || opc == LST_GROUP_REFRESH) {
		rc = lst_get_node_count(opc == LST_GROUP_RMND ? LST_OPC_NODES :
								LST_OPC_GROUP,
					opc == LST_GROUP_RMND ? str : grp,
					&count, &ids);

		if (rc != 0) {
			fprintf(stderr, "Can't get count of nodes from %s: %s\n",
				opc == LST_GROUP_RMND ? str : grp,
				strerror(errno));
			return -1;
		}

		rc = lst_alloc_rpcent(&head, count, 0);
		if (rc != 0) {
			fprintf(stderr, "Out of memory\n");
			free(ids);
			return -1;
		}
	}

	rc = lst_update_group_ioctl(opc, grp, clean, count, ids, &head);

	if (ids != NULL)
		free(ids);

	if (rc == 0) {
		lst_free_rpcent(&head);
		return 0;
	}

	if (rc == -1) {
		lst_free_rpcent(&head);
		lst_print_error("group", "Failed to update group: %s\n",
				strerror(errno));
		return rc;
	}

	lst_print_transerr(&head, "Updating group");

	lst_free_rpcent(&head);

	return rc;
}

static int
lst_list_group_ioctl(int len, char *name, int idx)
{
	struct lstio_group_list_args args = { 0 };

	args.lstio_grp_key   = session_key;
	args.lstio_grp_idx   = idx;
	args.lstio_grp_nmlen = len;
	args.lstio_grp_namep = name;

	return lst_ioctl(LSTIO_GROUP_LIST, &args, sizeof(args));
}

static int
lst_info_group_ioctl(char *name, struct lstcon_ndlist_ent *gent,
		     int *idx, int *count, struct lstcon_node_ent *dents)
{
	struct lstio_group_info_args args = { 0 };

	args.lstio_grp_key    = session_key;
	args.lstio_grp_nmlen  = strlen(name);
	args.lstio_grp_namep  = name;
	args.lstio_grp_entp   = gent;
	args.lstio_grp_idxp   = idx;
	args.lstio_grp_ndentp = count;
	args.lstio_grp_dentsp = dents;

	return lst_ioctl(LSTIO_GROUP_INFO, &args, sizeof(args));
}

static int
lst_list_group_all(void)
{
	char name[LST_NAME_SIZE];
	int rc, i;

	/* no group is specified, list name of all groups */
	for (i = 0; ; i++) {
		rc = lst_list_group_ioctl(LST_NAME_SIZE, name, i);
		if (rc == 0) {
			fprintf(stdout, "%d) %s\n", i + 1, name);
			continue;
		}

		if (errno == ENOENT)
			break;

		lst_print_error("group", "Failed to list group: %s\n",
				strerror(errno));
		return -1;
	}

	fprintf(stdout, "Total %d groups\n", i);

	return 0;
}

static int
jt_lst_list_group(int argc, char **argv)
{
	struct lstcon_ndlist_ent gent;
	struct lstcon_node_ent   *dents;
	int states = 0;
	int optidx  = 0;
	int verbose = 0;
	int active  = 0;
	int busy    = 0;
	int down    = 0;
	int unknown = 0;
	int all     = 0;
	int count;
	int index;
	int i;
	int j;
	int c;
	int rc      = 0;
	static const struct option list_group_opts[] = {
		{ .name = "active",  .has_arg = no_argument, .val = 'a' },
		{ .name = "busy",    .has_arg = no_argument, .val = 'b' },
		{ .name = "down",    .has_arg = no_argument, .val = 'd' },
		{ .name = "unknown", .has_arg = no_argument, .val = 'u' },
		{ .name = "all",     .has_arg = no_argument, .val = 'l' },
		{ .name = NULL, } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "abdul", list_group_opts, &optidx);
		if (c == -1)
			break;

		switch (c) {
		case 'a':
			verbose = active = 1;
			states |= LST_NODE_ACTIVE;
			all = 0;
			break;
		case 'b':
			verbose = busy = 1;
			states |= LST_NODE_BUSY;
			all = 0;
			break;
		case 'd':
			verbose = down = 1;
			states |= LST_NODE_DOWN;
			all = 0;
			break;
		case 'u':
			verbose = unknown = 1;
			states |= LST_NODE_UNKNOWN;
			all = 0;
			break;
		case 'l':
			states |= LST_NODE_ACTIVE | LST_NODE_BUSY |
				  LST_NODE_DOWN | LST_NODE_UNKNOWN;
			verbose = all = 1;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc) {
		rc = lst_yaml_groups(NLM_F_DUMP, NULL, 0, true);
		if (rc <= 0) {
			if (rc == -EOPNOTSUPP)
				goto old_api;
			return rc;
		}
	} else {
		for (i = optind; i < argc; i++) {
			rc = lst_yaml_groups(NLM_F_DUMP, argv[i], states,
					     i == optind ? true : false);
			if (rc < 0) {
				if (rc == -EOPNOTSUPP)
					goto old_api;
				return rc;
			}
		}
		return 0;
	}
old_api:
	if (optind == argc) {
		/* no group is specified, list name of all groups */
		rc = lst_list_group_all();

		return rc;
	}

	if (!verbose)
		fprintf(stdout, LST_NODES_TITLE);

	/* list nodes in specified groups */
	for (i = optind; i < argc; i++) {
		rc = lst_info_group_ioctl(argv[i], &gent, NULL, NULL, NULL);
		if (rc != 0) {
			if (errno == ENOENT) {
				rc = 0;
				break;
			}

			lst_print_error("group", "Failed to list group: %s\n",
					strerror(errno));
			break;
		}

		if (!verbose) {
			fprintf(stdout, "\t%d\t%d\t%d\t%d\t%d\t%s\n",
				gent.nle_nactive, gent.nle_nbusy,
				gent.nle_ndown, gent.nle_nunknown,
				gent.nle_nnode, argv[i]);
			continue;
		}

		fprintf(stdout, "Group [ %s ]\n", argv[i]);

		if (gent.nle_nnode == 0) {
			fprintf(stdout, "No nodes found [ %s ]\n", argv[i]);
			continue;
		}

		count = gent.nle_nnode;

		dents = malloc(count * sizeof(struct lstcon_node_ent));
		if (dents == NULL) {
			fprintf(stderr, "Failed to malloc: %s\n",
				strerror(errno));
			return -1;
		}

		index = 0;
		rc = lst_info_group_ioctl(argv[i], &gent, &index, &count,
					  dents);
		if (rc != 0) {
			lst_print_error("group", "Failed to list group: %s\n",
					strerror(errno));
			free(dents);
			return -1;
		}

		for (j = 0, c = 0; j < count; j++) {
			if (all ||
			    ((active && dents[j].nde_state == LST_NODE_ACTIVE) ||
			     (busy && dents[j].nde_state == LST_NODE_BUSY) ||
			     (down && dents[j].nde_state == LST_NODE_DOWN) ||
			     (unknown && dents[j].nde_state == LST_NODE_UNKNOWN))) {

				fprintf(stdout, "\t%s: %s\n",
					libcfs_id2str(dents[j].nde_id),
					lst_node_state2str(dents[j].nde_state));
				c++;
			}
		}

		fprintf(stdout, "Total %d nodes [ %s ]\n", c, argv[i]);

		free(dents);
	}

	return rc;
}

static int
lst_stat_ioctl(char *name, int count, struct lnet_process_id *idsp,
	       int timeout, struct list_head *resultp)
{
	struct lstio_stat_args args = { 0 };

	args.lstio_sta_key     = session_key;
	args.lstio_sta_timeout = timeout;
	args.lstio_sta_nmlen   = strlen(name);
	args.lstio_sta_namep   = name;
	args.lstio_sta_count   = count;
	args.lstio_sta_idsp    = idsp;
	args.lstio_sta_resultp = resultp;

	return lst_ioctl(LSTIO_STAT_QUERY, &args, sizeof(args));
}

typedef struct {
	struct list_head	srp_link;
	int			srp_count;
	char			*srp_name;
	struct lnet_process_id	*srp_ids;
	struct list_head	srp_result[2];
} lst_stat_req_param_t;

static void
lst_stat_req_param_free(lst_stat_req_param_t *srp)
{
	int i;

	for (i = 0; i < 2; i++)
		lst_free_rpcent(&srp->srp_result[i]);

	if (srp->srp_ids != NULL)
		free(srp->srp_ids);

	free(srp);
}

static int
lst_stat_req_param_alloc(char *name, lst_stat_req_param_t **srpp, int save_old)
{
	lst_stat_req_param_t *srp = NULL;
	int count = save_old ? 2 : 1;
	int rc, i;

	srp = malloc(sizeof(*srp));
	if (srp == NULL)
		return -ENOMEM;

	memset(srp, 0, sizeof(*srp));
	INIT_LIST_HEAD(&srp->srp_result[0]);
	INIT_LIST_HEAD(&srp->srp_result[1]);

	rc = lst_get_node_count(LST_OPC_GROUP, name, &srp->srp_count, NULL);
	if (rc != 0 && errno == ENOENT) {
		rc = lst_get_node_count(LST_OPC_NODES, name,
					&srp->srp_count, &srp->srp_ids);
	}

	if (rc != 0) {
		fprintf(stderr,
			"Failed to get count of nodes from %s: %s\n",
			name, strerror(errno));
		lst_stat_req_param_free(srp);

		return rc;
	}

	srp->srp_name = name;

	for (i = 0; i < count; i++) {
		rc = lst_alloc_rpcent(&srp->srp_result[i], srp->srp_count,
				      sizeof(struct sfw_counters)  +
				      sizeof(struct srpc_counters) +
				      sizeof(struct lnet_counters_common));
		if (rc != 0) {
			fprintf(stderr, "Out of memory\n");
			break;
		}
	}

	if (rc == 0) {
		*srpp = srp;
		return 0;
	}

	lst_stat_req_param_free(srp);

	return rc;
}

typedef struct {
	/* TODO */
	int foo;
} lst_srpc_stat_result;

#define LST_LNET_AVG    0
#define LST_LNET_MIN    1
#define LST_LNET_MAX    2

typedef struct {
	float           lnet_avg_sndrate;
	float           lnet_min_sndrate;
	float           lnet_max_sndrate;
	float           lnet_total_sndrate;

	float           lnet_avg_rcvrate;
	float           lnet_min_rcvrate;
	float           lnet_max_rcvrate;
	float           lnet_total_rcvrate;

	float           lnet_avg_sndperf;
	float           lnet_min_sndperf;
	float           lnet_max_sndperf;
	float           lnet_total_sndperf;

	float           lnet_avg_rcvperf;
	float           lnet_min_rcvperf;
	float           lnet_max_rcvperf;
	float           lnet_total_rcvperf;

	int             lnet_stat_count;
} lst_lnet_stat_result_t;

lst_lnet_stat_result_t lnet_stat_result;

static float
lst_lnet_stat_value(int bw, int send, int off)
{
	float *p;

	p = bw ? &lnet_stat_result.lnet_avg_sndperf :
	    &lnet_stat_result.lnet_avg_sndrate;

	if (!send)
		p += 4;

	p += off;

	return *p;
}

static void
lst_cal_lnet_stat(float delta, struct lnet_counters_common *lnet_new,
		  struct lnet_counters_common *lnet_old, int mbs)
{
	float perf;
	float rate;
	unsigned int unit_divisor;

	unit_divisor = (mbs) ? (1000 * 1000) : (1024 * 1024);
	perf = (float)(lnet_new->lcc_send_length -
		       lnet_old->lcc_send_length) / unit_divisor / delta;
	lnet_stat_result.lnet_total_sndperf += perf;

	if (lnet_stat_result.lnet_min_sndperf > perf ||
	    lnet_stat_result.lnet_min_sndperf == 0)
		lnet_stat_result.lnet_min_sndperf = perf;

	if (lnet_stat_result.lnet_max_sndperf < perf)
		lnet_stat_result.lnet_max_sndperf = perf;

	perf = (float)(lnet_new->lcc_recv_length -
		       lnet_old->lcc_recv_length) / unit_divisor / delta;
	lnet_stat_result.lnet_total_rcvperf += perf;

	if (lnet_stat_result.lnet_min_rcvperf > perf ||
	    lnet_stat_result.lnet_min_rcvperf == 0)
		lnet_stat_result.lnet_min_rcvperf = perf;

	if (lnet_stat_result.lnet_max_rcvperf < perf)
		lnet_stat_result.lnet_max_rcvperf = perf;

	rate = (lnet_new->lcc_send_count - lnet_old->lcc_send_count) / delta;
	lnet_stat_result.lnet_total_sndrate += rate;

	if (lnet_stat_result.lnet_min_sndrate > rate ||
	    lnet_stat_result.lnet_min_sndrate == 0)
		lnet_stat_result.lnet_min_sndrate = rate;

	if (lnet_stat_result.lnet_max_sndrate < rate)
		lnet_stat_result.lnet_max_sndrate = rate;

	rate = (lnet_new->lcc_recv_count - lnet_old->lcc_recv_count) / delta;
	lnet_stat_result.lnet_total_rcvrate += rate;

	if (lnet_stat_result.lnet_min_rcvrate > rate ||
	    lnet_stat_result.lnet_min_rcvrate == 0)
		lnet_stat_result.lnet_min_rcvrate = rate;

	if (lnet_stat_result.lnet_max_rcvrate < rate)
		lnet_stat_result.lnet_max_rcvrate = rate;

	lnet_stat_result.lnet_stat_count++;

	lnet_stat_result.lnet_avg_sndrate = lnet_stat_result.lnet_total_sndrate /
					    lnet_stat_result.lnet_stat_count;
	lnet_stat_result.lnet_avg_rcvrate = lnet_stat_result.lnet_total_rcvrate /
					    lnet_stat_result.lnet_stat_count;

	lnet_stat_result.lnet_avg_sndperf = lnet_stat_result.lnet_total_sndperf /
					    lnet_stat_result.lnet_stat_count;
	lnet_stat_result.lnet_avg_rcvperf = lnet_stat_result.lnet_total_rcvperf /
					    lnet_stat_result.lnet_stat_count;
}

static void
lst_print_lnet_stat(char *name, int bwrt, int rdwr, int type, int mbs)
{
	int start1 = 0;
	int end1   = 1;
	int start2 = 0;
	int end2   = 1;
	int i;
	int j;
	char *units;

	if (lnet_stat_result.lnet_stat_count == 0)
		return;

	units = (mbs) ? "MB/s  " : "MiB/s ";

	if (bwrt == 1) /* bw only */
		start1 = 1;

	if (bwrt == 2) /* rates only */
		end1 = 0;

	if (rdwr == 1) /* recv only */
		start2 = 1;

	if (rdwr == 2) /* send only */
		end2 = 0;

	for (i = start1; i <= end1; i++) {
		fprintf(stdout, "[LNet %s of %s]\n",
			i == 0 ? "Rates" : "Bandwidth", name);

		for (j = start2; j <= end2; j++) {
			fprintf(stdout, "[%c] ", j == 0 ? 'R' : 'W');

			if ((type & 1) != 0) {
				fprintf(stdout, i == 0 ? "Avg: %-8.0f RPC/s " :
							 "Avg: %-8.2f %s",
					lst_lnet_stat_value(i, j, 0), units);
			}

			if ((type & 2) != 0) {
				fprintf(stdout, i == 0 ? "Min: %-8.0f RPC/s " :
							 "Min: %-8.2f %s",
					lst_lnet_stat_value(i, j, 1), units);
			}

			if ((type & 4) != 0) {
				fprintf(stdout, i == 0 ? "Max: %-8.0f RPC/s" :
							 "Max: %-8.2f %s",
					lst_lnet_stat_value(i, j, 2), units);
			}

			fprintf(stdout, "\n");
		}
	}
}

static void
lst_print_stat(char *name, struct list_head *resultp,
	       int idx, int lnet, int bwrt, int rdwr, int type,
	       int mbs)
{
	struct list_head tmp[2];
	struct lstcon_rpc_ent *new;
	struct lstcon_rpc_ent *old;
	struct sfw_counters *sfwk_new;
	struct sfw_counters *sfwk_old;
	struct srpc_counters *srpc_new;
	struct srpc_counters *srpc_old;
	struct lnet_counters_common *lnet_new;
	struct lnet_counters_common *lnet_old;
	float delta;
	int errcount = 0;

	INIT_LIST_HEAD(&tmp[0]);
	INIT_LIST_HEAD(&tmp[1]);

	memset(&lnet_stat_result, 0, sizeof(lnet_stat_result));

	while (!list_empty(&resultp[idx])) {
		if (list_empty(&resultp[1 - idx])) {
			fprintf(stderr, "Group is changed, re-run stat\n");
			break;
		}

		new = list_first_entry(&resultp[idx], struct lstcon_rpc_ent,
				       rpe_link);
		old = list_first_entry(&resultp[1 - idx], struct lstcon_rpc_ent,
				       rpe_link);

		/* first time get stats result, can't calculate diff */
		if (new->rpe_peer.nid == LNET_NID_ANY)
			break;

		if (new->rpe_peer.nid != old->rpe_peer.nid ||
		    new->rpe_peer.pid != old->rpe_peer.pid) {
			/* Something wrong. i.e, somebody change the group */
			break;
		}

		list_move_tail(&new->rpe_link, &tmp[idx]);

		list_move_tail(&old->rpe_link, &tmp[1 - idx]);

		if (new->rpe_rpc_errno != 0 || new->rpe_fwk_errno != 0 ||
		    old->rpe_rpc_errno != 0 || old->rpe_fwk_errno != 0) {
			errcount++;
			continue;
		}

		sfwk_new = (struct sfw_counters *)&new->rpe_payload[0];
		sfwk_old = (struct sfw_counters *)&old->rpe_payload[0];

		srpc_new = (struct srpc_counters *)((char *)sfwk_new +
						    sizeof(*sfwk_new));
		srpc_old = (struct srpc_counters *)((char *)sfwk_old +
						    sizeof(*sfwk_old));

		lnet_new = (struct lnet_counters_common *)((char *)srpc_new +
							   sizeof(*srpc_new));
		lnet_old = (struct lnet_counters_common *)((char *)srpc_old +
							   sizeof(*srpc_old));

		/* Prior to version 2.3, the running_ms was a counter for
		 * the number of running tests. Since 2.3, running_ms is
		 * changed to hold the millisecond since the start of
		 * the work item. The rpe_stamp field was formerly used,
		 * but is no longer. In 2.12 rpe_stamp was changed to
		 * struct timespec64 and has nanosecond resolution, in
		 * case it is needed in the future.
		 */
		delta = (float)(sfwk_new->running_ms -
				sfwk_old->running_ms) / 1000;

		if (!lnet) /* TODO */
			continue;

		lst_cal_lnet_stat(delta, lnet_new, lnet_old, mbs);
	}

	list_splice(&tmp[idx], &resultp[idx]);
	list_splice(&tmp[1 - idx], &resultp[1 - idx]);

	if (errcount > 0)
		fprintf(stdout, "Failed to stat on %d nodes\n", errcount);

	if (!lnet)  /* TODO */
		return;

	lst_print_lnet_stat(name, bwrt, rdwr, type, mbs);
}

static int
jt_lst_stat(int argc, char **argv)
{
	struct list_head head;
	lst_stat_req_param_t *srp;
	time_t last    = 0;
	int optidx = 0;
	int timeout = 5; /* default timeout, 5 sec */
	int delay = 5; /* default delay, 5 sec */
	int count = -1; /* run forever */
	int lnet = 1; /* lnet stat by default */
	int bwrt = 0;
	int rdwr = 0;
	int type = -1;
	int idx = 0;
	int mbs = 0; /* report as MB/s */
	int rc, c;

	static const struct option stat_opts[] = {
		{ .name = "timeout", .has_arg = required_argument, .val = 't' },
		{ .name = "delay",   .has_arg = required_argument, .val = 'd' },
		{ .name = "count",   .has_arg = required_argument, .val = 'o' },
		{ .name = "lnet",    .has_arg = no_argument,	   .val = 'l' },
		{ .name = "rpc",     .has_arg = no_argument,       .val = 'c' },
		{ .name = "bw",      .has_arg = no_argument,       .val = 'b' },
		{ .name = "rate",    .has_arg = no_argument,       .val = 'a' },
		{ .name = "read",    .has_arg = no_argument,       .val = 'r' },
		{ .name = "write",   .has_arg = no_argument,       .val = 'w' },
		{ .name = "avg",     .has_arg = no_argument,       .val = 'g' },
		{ .name = "min",     .has_arg = no_argument,       .val = 'n' },
		{ .name = "max",     .has_arg = no_argument,       .val = 'x' },
		{ .name = "mbs",     .has_arg = no_argument,       .val = 'm' },
		{ .name = NULL } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "t:d:lcbarwgnxm", stat_opts,
				&optidx);

		if (c == -1)
			break;

		switch (c) {
		case 't':
			timeout = atoi(optarg);
			break;
		case 'd':
			delay = atoi(optarg);
			break;
		case 'o':
			count = atoi(optarg);
			break;
		case 'l':
			lnet = 1;
			break;
		case 'c':
			lnet = 0;
			break;
		case 'b':
			bwrt |= 1;
			break;
		case 'a':
			bwrt |= 2;
			break;
		case 'r':
			rdwr |= 1;
			break;
		case 'w':
			rdwr |= 2;
			break;
		case 'g':
			if (type == -1) {
				type = 1;
				break;
			}
			type |= 1;
			break;
		case 'n':
			if (type == -1) {
				type = 2;
				break;
			}
			type |= 2;
			break;
		case 'x':
			if (type == -1) {
				type = 4;
				break;
			}
			type |= 4;
			break;
		case 'm':
			mbs = 1;
			break;

		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc) {
		return lst_print_usage(argv[0]);
	}

	if (timeout <= 0 || delay <= 0) {
		fprintf(stderr, "Invalid timeout or delay value\n");
		return -1;
	}

	if (count < -1) {
		fprintf(stderr, "Invalid count value\n");
		return -1;
	}

	/* extra count to get first data point */
	if (count != -1)
		count++;

	INIT_LIST_HEAD(&head);

	while (optind < argc) {
		rc = lst_stat_req_param_alloc(argv[optind++], &srp, 1);
		if (rc != 0)
			goto out;

		list_add_tail(&srp->srp_link, &head);
	}

	do {
		time_t  now = time(NULL);

		if (now - last < delay) {
			sleep(delay - now + last);
			time(&now);
		}
		last = now;

		list_for_each_entry(srp, &head, srp_link) {
			rc = lst_stat_ioctl(srp->srp_name, srp->srp_count,
					    srp->srp_ids, timeout,
					    &srp->srp_result[idx]);
			if (rc == -1) {
				lst_print_error("stat",
						"Failed to stat %s: %s\n",
						srp->srp_name, strerror(errno));
				goto out;
			}

			lst_print_stat(srp->srp_name, srp->srp_result,
				       idx, lnet, bwrt, rdwr, type, mbs);

			lst_reset_rpcent(&srp->srp_result[1 - idx]);
		}

		idx = 1 - idx;

		if (count > 0)
			count--;
	} while (count == -1 || count > 0);

out:
	while (!list_empty(&head)) {
		srp = list_first_entry(&head, lst_stat_req_param_t, srp_link);

		list_del(&srp->srp_link);
		lst_stat_req_param_free(srp);
	}

	return rc;
}

static int
jt_lst_show_error(int argc, char **argv)
{
	struct list_head head;
	lst_stat_req_param_t *srp;
	struct lstcon_rpc_ent *ent;
	struct sfw_counters *sfwk;
	struct srpc_counters *srpc;
	int show_rpc = 1;
	int optidx = 0;
	int rc = 0;
	int ecount, c;

	static const struct option show_error_opts[] = {
		{ .name = "session", .has_arg = no_argument, .val = 's' },
		{ .name = NULL, } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "s", show_error_opts, &optidx);

		if (c == -1)
			break;

		switch (c) {
		case 's':
			show_rpc  = 0;
			break;

		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc)
		return lst_print_usage(argv[0]);

	INIT_LIST_HEAD(&head);

	while (optind < argc) {
		rc = lst_stat_req_param_alloc(argv[optind++], &srp, 0);
		if (rc != 0)
			goto out;

		list_add_tail(&srp->srp_link, &head);
	}

	list_for_each_entry(srp, &head, srp_link) {
		rc = lst_stat_ioctl(srp->srp_name, srp->srp_count,
				    srp->srp_ids, 10, &srp->srp_result[0]);

		if (rc == -1) {
			lst_print_error(srp->srp_name,
					"Failed to show errors of %s: %s\n",
					srp->srp_name, strerror(errno));
			goto out;
		}

		fprintf(stdout, "%s:\n", srp->srp_name);

		ecount = 0;

		list_for_each_entry(ent, &srp->srp_result[0], rpe_link) {
			if (ent->rpe_rpc_errno != 0) {
				ecount++;
				fprintf(stderr,
					"RPC failure, can't show error on %s\n",
					libcfs_id2str(ent->rpe_peer));
				continue;
			}

			if (ent->rpe_fwk_errno != 0) {
				ecount++;
				fprintf(stderr,
					"Framework failure, can't show error on %s\n",
					libcfs_id2str(ent->rpe_peer));
				continue;
			}

			sfwk = (struct sfw_counters *)&ent->rpe_payload[0];
			srpc = (struct srpc_counters *)((char *)sfwk +
				sizeof(*sfwk));

			if (srpc->errors == 0 &&
			    sfwk->brw_errors == 0 && sfwk->ping_errors == 0)
				continue;

			if (!show_rpc &&
			    sfwk->brw_errors == 0 && sfwk->ping_errors == 0)
				continue;

			ecount++;

			fprintf(stderr,
				"%s: [Session %d brw errors, %d ping errors]%c",
				libcfs_id2str(ent->rpe_peer),
				sfwk->brw_errors, sfwk->ping_errors,
				show_rpc  ? ' ' : '\n');

			if (!show_rpc)
				continue;

			fprintf(stderr,
				"[RPC: %d errors, %d dropped, %d expired]\n",
				srpc->errors, srpc->rpcs_dropped,
				srpc->rpcs_expired);
		}

		fprintf(stdout, "Total %d error nodes in %s\n", ecount,
			srp->srp_name);
	}
out:
	while (!list_empty(&head)) {
		srp = list_first_entry(&head, lst_stat_req_param_t, srp_link);

		list_del(&srp->srp_link);
		lst_stat_req_param_free(srp);
	}

	return rc;
}

static int
lst_add_batch_ioctl(char *name)
{
	struct lstio_batch_add_args args = { 0 };

	args.lstio_bat_key   = session_key;
	args.lstio_bat_nmlen = strlen(name);
	args.lstio_bat_namep = name;

	return lst_ioctl(LSTIO_BATCH_ADD, &args, sizeof(args));
}

static int
jt_lst_add_batch(int argc, char **argv)
{
	char *name;
	int rc;

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	if (argc != 2)
		return lst_print_usage(argv[0]);

	name = argv[1];
	if (strlen(name) >= LST_NAME_SIZE) {
		fprintf(stderr, "Name length is limited to %d\n",
			LST_NAME_SIZE - 1);
		return -1;
	}

	rc = lst_add_batch_ioctl(name);
	if (rc == 0)
		return 0;

	lst_print_error("batch", "Failed to create batch: %s\n",
			strerror(errno));

	return -1;
}

static int
lst_start_batch_ioctl(char *name, int timeout, struct list_head *resultp)
{
	struct lstio_batch_run_args args = { 0 };

	args.lstio_bat_key     = session_key;
	args.lstio_bat_timeout = timeout;
	args.lstio_bat_nmlen   = strlen(name);
	args.lstio_bat_namep   = name;
	args.lstio_bat_resultp = resultp;

	return lst_ioctl(LSTIO_BATCH_START, &args, sizeof(args));
}

static int
jt_lst_start_batch(int argc, char **argv)
{
	struct list_head head;
	char *batch;
	int optidx = 0;
	int timeout = 0;
	int count = 0;
	int rc;
	int c;

	static const struct option start_batch_opts[] = {
		{ .name = "timeout", .has_arg = required_argument, .val = 't' },
		{ .name = NULL } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "t:",
				start_batch_opts, &optidx);

		/* Detect the end of the options. */
		if (c == -1)
			break;

		switch (c) {
		case 't':
			timeout = atoi(optarg);
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc) {
		batch = LST_DEFAULT_BATCH;

	} else if (optind == argc - 1) {
		batch = argv[optind];

	} else {
		return lst_print_usage(argv[0]);
	}

	rc = lst_get_node_count(LST_OPC_BATCHCLI, batch, &count, NULL);
	if (rc != 0) {
		fprintf(stderr, "Failed to get count of nodes from %s: %s\n",
			batch, strerror(errno));
		return -1;
	}

	INIT_LIST_HEAD(&head);

	rc = lst_alloc_rpcent(&head, count, 0);
	if (rc != 0) {
		fprintf(stderr, "Out of memory\n");
		return -1;
	}

	rc = lst_start_batch_ioctl(batch, timeout, &head);

	if (rc == 0) {
		fprintf(stdout, "%s is running now\n", batch);
		lst_free_rpcent(&head);
		return 0;
	}

	if (rc == -1) {
		lst_print_error("batch", "Failed to start batch: %s\n",
				strerror(errno));
		lst_free_rpcent(&head);
		return rc;
	}

	lst_print_transerr(&head, "Run batch");

	lst_free_rpcent(&head);

	return rc;
}

static int
lst_stop_batch_ioctl(char *name, int force, struct list_head *resultp)
{
	struct lstio_batch_stop_args args = { 0 };

	args.lstio_bat_key     = session_key;
	args.lstio_bat_force   = force;
	args.lstio_bat_nmlen   = strlen(name);
	args.lstio_bat_namep   = name;
	args.lstio_bat_resultp = resultp;

	return lst_ioctl(LSTIO_BATCH_STOP, &args, sizeof(args));
}

static int
jt_lst_stop_batch(int argc, char **argv)
{
	struct list_head  head;
	char *batch;
	int force = 0;
	int optidx;
	int count;
	int rc, c;

	static const struct option stop_batch_opts[] = {
		{ .name = "force", .has_arg = no_argument, .val = 'f' },
		{ .name = NULL } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "f", stop_batch_opts, &optidx);
		/* Detect the end of the options. */
		if (c == -1)
			break;

		switch (c) {
		case 'f':
			force = 1;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc) {
		batch = LST_DEFAULT_BATCH;

	} else if (optind == argc - 1) {
		batch = argv[optind];

	} else {
		return lst_print_usage(argv[0]);
	}

	rc = lst_get_node_count(LST_OPC_BATCHCLI, batch, &count, NULL);
	if (rc != 0) {
		fprintf(stderr, "Failed to get count of nodes from %s: %s\n",
			batch, strerror(errno));
		return -1;
	}

	INIT_LIST_HEAD(&head);

	rc = lst_alloc_rpcent(&head, count, 0);
	if (rc != 0) {
		fprintf(stderr, "Out of memory\n");
		return -1;
	}

	rc = lst_stop_batch_ioctl(batch, force, &head);
	if (rc != 0)
		goto out;

	while (1) {
		lst_reset_rpcent(&head);

		rc = lst_query_batch_ioctl(batch, 0, 0, 30, &head);
		if (rc != 0)
			goto out;

		if (lstcon_tsbqry_stat_run(&trans_stat, 0)  == 0 &&
		    lstcon_tsbqry_stat_failure(&trans_stat, 0) == 0)
			break;

		fprintf(stdout, "%d batch in stopping\n",
			lstcon_tsbqry_stat_run(&trans_stat, 0));
		sleep(1);
	}

	fprintf(stdout, "Batch is stopped\n");
	lst_free_rpcent(&head);

	return 0;
out:
	if (rc == -1) {
		lst_print_error("batch", "Failed to stop batch: %s\n",
				strerror(errno));
		lst_free_rpcent(&head);
		return -1;
	}

	lst_print_transerr(&head, "stop batch");

	lst_free_rpcent(&head);

	return rc;
}

static int
lst_list_batch_ioctl(int len, char *name, int index)
{
	struct lstio_batch_list_args args = { 0 };

	args.lstio_bat_key   = session_key;
	args.lstio_bat_idx   = index;
	args.lstio_bat_nmlen = len;
	args.lstio_bat_namep = name;

	return lst_ioctl(LSTIO_BATCH_LIST, &args, sizeof(args));
}

static int
lst_info_batch_ioctl(char *batch, int test, int server,
		     struct lstcon_test_batch_ent *entp, int *idxp,
		     int *ndentp, struct lstcon_node_ent *dentsp)
{
	struct lstio_batch_info_args args = { 0 };

	args.lstio_bat_key     = session_key;
	args.lstio_bat_nmlen   = strlen(batch);
	args.lstio_bat_namep   = batch;
	args.lstio_bat_server  = server;
	args.lstio_bat_testidx = test;
	args.lstio_bat_entp    = entp;
	args.lstio_bat_idxp    = idxp;
	args.lstio_bat_ndentp  = ndentp;
	args.lstio_bat_dentsp  = dentsp;

	return lst_ioctl(LSTIO_BATCH_INFO, &args, sizeof(args));
}

static int
lst_list_batch_all(void)
{
	char name[LST_NAME_SIZE] = {0};
	int rc, i;

	for (i = 0; ; i++) {
		rc = lst_list_batch_ioctl(LST_NAME_SIZE, name, i);
		if (rc == 0) {
			fprintf(stdout, "%d) %s\n", i + 1, name);
			continue;
		}

		if (errno == ENOENT)
			break;

		lst_print_error("batch", "Failed to list batch: %s\n",
				strerror(errno));
		return rc;
	}

	fprintf(stdout, "Total %d batches\n", i);

	return 0;
}

static int
lst_list_tsb_nodes(char *batch, int test, int server,
		   int count, int active, int invalid)
{
	struct lstcon_node_ent *dents;
	int index = 0;
	int rc, c, i;

	if (count == 0)
		return 0;

	/* verbose list, show nodes in batch or test */
	dents = malloc(count * sizeof(struct lstcon_node_ent));
	if (dents == NULL) {
		fprintf(stdout, "Can't allocate memory\n");
		return -1;
	}

	rc = lst_info_batch_ioctl(batch, test, server,
				  NULL, &index, &count, dents);
	if (rc != 0) {
		free(dents);
		lst_print_error((test > 0) ? "test" : "batch",
				(test > 0) ? "Failed to query test: %s\n" :
				 "Failed to query batch: %s\n",
				strerror(errno));
		return -1;
	}

	for (i = 0, c = 0; i < count; i++) {
		if ((!active  && dents[i].nde_state == LST_NODE_ACTIVE) ||
		     (!invalid && (dents[i].nde_state == LST_NODE_BUSY  ||
				   dents[i].nde_state == LST_NODE_DOWN  ||
				   dents[i].nde_state == LST_NODE_UNKNOWN)))
			continue;

		fprintf(stdout, "\t%s: %s\n",
			libcfs_id2str(dents[i].nde_id),
			lst_node_state2str(dents[i].nde_state));
		c++;
	}

	fprintf(stdout, "Total %d nodes\n", c);
	free(dents);

	return 0;
}

static int
jt_lst_list_batch(int argc, char **argv)
{
	struct lstcon_test_batch_ent ent;
	char *batch   = NULL;
	int optidx = 0;
	int verbose = 0; /* list nodes in batch or test */
	int invalid = 0;
	int active = 0;
	int server = 0;
	int ntest = 0;
	int test = 0;
	int c = 0;
	int rc;

	static const struct option list_batch_opts[] = {
		{ .name = "test",    .has_arg = required_argument, .val = 't' },
		{ .name = "invalid", .has_arg = no_argument,	   .val = 'i' },
		{ .name = "active",  .has_arg = no_argument,	   .val = 'a' },
		{ .name = "all",     .has_arg = no_argument,	   .val = 'l' },
		{ .name = "server",  .has_arg = no_argument,	   .val = 's' },
		{ .name = NULL, } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "ailst:", list_batch_opts, &optidx);
		if (c == -1)
			break;

		switch (c) {
		case 'a':
			verbose = active = 1;
			break;
		case 'i':
			verbose = invalid = 1;
			break;
		case 'l':
			verbose = active = invalid = 1;
			break;
		case 's':
			server = 1;
			break;
		case 't':
			test = atoi(optarg);
			ntest = 1;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc) {
		/* list all batches */
		rc = lst_list_batch_all();
		return rc;
	}

	if (ntest == 1 && test <= 0) {
		fprintf(stderr, "Invalid test id, test id starts from 1\n");
		return -1;
	}

	if (optind != argc - 1)
		return lst_print_usage(argv[0]);

	batch = argv[optind];

loop:
	/* show detail of specified batch or test */
	rc = lst_info_batch_ioctl(batch, test, server, &ent, NULL, NULL, NULL);
	if (rc != 0) {
		lst_print_error((test > 0) ? "test" : "batch",
				(test > 0) ? "Failed to query test: %s\n" :
				 "Failed to query batch: %s\n",
				strerror(errno));
		return -1;
	}

	if (verbose) {
		/* list nodes in test or batch */
		rc = lst_list_tsb_nodes(batch, test, server,
					server ? ent.tbe_srv_nle.nle_nnode :
						 ent.tbe_cli_nle.nle_nnode,
					active, invalid);
		return rc;
	}

	/* only show number of hosts in batch or test */
	if (test == 0) {
		fprintf(stdout, "Batch: %s Tests: %d State: %d\n",
			batch, ent.u.tbe_batch.bae_ntest,
			ent.u.tbe_batch.bae_state);
		ntest = ent.u.tbe_batch.bae_ntest;
		test = 1; /* starting from test 1 */
	} else {
		fprintf(stdout,
			"\tTest %d(%s) (loop: %d, concurrency: %d)\n",
			test, lst_test_type2name(ent.u.tbe_test.tse_type),
			ent.u.tbe_test.tse_loop,
			ent.u.tbe_test.tse_concur);
		ntest--;
		test++;
	}

	fprintf(stdout, LST_NODES_TITLE);
	fprintf(stdout, "client\t%d\t%d\t%d\t%d\t%d\n"
			"server\t%d\t%d\t%d\t%d\t%d\n",
		ent.tbe_cli_nle.nle_nactive,
		ent.tbe_cli_nle.nle_nbusy,
		ent.tbe_cli_nle.nle_ndown,
		ent.tbe_cli_nle.nle_nunknown,
		ent.tbe_cli_nle.nle_nnode,
		ent.tbe_srv_nle.nle_nactive,
		ent.tbe_srv_nle.nle_nbusy,
		ent.tbe_srv_nle.nle_ndown,
		ent.tbe_srv_nle.nle_nunknown,
		ent.tbe_srv_nle.nle_nnode);

	if (ntest != 0)
		goto loop;

	return 0;
}

static int
lst_query_batch_ioctl(char *batch, int test, int server,
		      int timeout, struct list_head *head)
{
	struct lstio_batch_query_args args = { 0 };

	args.lstio_bat_key     = session_key;
	args.lstio_bat_testidx = test;
	args.lstio_bat_client  = !(server);
	args.lstio_bat_timeout = timeout;
	args.lstio_bat_nmlen   = strlen(batch);
	args.lstio_bat_namep   = batch;
	args.lstio_bat_resultp = head;

	return lst_ioctl(LSTIO_BATCH_QUERY, &args, sizeof(args));
}

static void
lst_print_tsb_verbose(struct list_head *head, int active, int idle, int error)
{
	struct lstcon_rpc_ent *ent;

	list_for_each_entry(ent, head, rpe_link) {
		if (ent->rpe_priv[0] == 0 && active)
			continue;

		if (ent->rpe_priv[0] != 0 && idle)
			continue;

		if (ent->rpe_fwk_errno == 0 && error)
			continue;

		fprintf(stdout, "%s [%s]: %s\n",
			libcfs_id2str(ent->rpe_peer),
			lst_node_state2str(ent->rpe_state),
			ent->rpe_rpc_errno != 0 ?
				strerror(ent->rpe_rpc_errno) :
				(ent->rpe_priv[0] > 0 ? "Running" : "Idle"));
	}
}

static int
jt_lst_query_batch(int argc, char **argv)
{
	struct lstcon_test_batch_ent ent;
	struct list_head head;
	char *batch = NULL;
	time_t last = 0;
	int optidx  = 0;
	int verbose = 0;
	int server  = 0;
	int timeout = 5; /* default 5 seconds */
	int delay = 5; /* default 5 seconds */
	int loop = 1; /* default 1 loop */
	int active = 0;
	int error = 0;
	int idle = 0;
	int count = 0;
	int test = 0;
	int rc = 0;
	int c = 0;
	int i;

	static const struct option query_batch_opts[] = {
		{ .name = "timeout", .has_arg = required_argument, .val = 'o' },
		{ .name = "delay",   .has_arg = required_argument, .val = 'd' },
		{ .name = "loop",    .has_arg = required_argument, .val = 'c' },
		{ .name = "test",    .has_arg = required_argument, .val = 't' },
		{ .name = "server",  .has_arg = no_argument,	   .val = 's' },
		{ .name = "active",  .has_arg = no_argument,	   .val = 'a' },
		{ .name = "idle",    .has_arg = no_argument,	   .val = 'i' },
		{ .name = "error",   .has_arg = no_argument,	   .val = 'e' },
		{ .name = "all",     .has_arg = no_argument,	   .val = 'l' },
		{ .name = NULL, } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "o:d:c:t:saiel",
				query_batch_opts, &optidx);

		/* Detect the end of the options. */
		if (c == -1)
			break;

		switch (c) {
		case 'o':
			timeout = atoi(optarg);
			break;
		case 'd':
			delay = atoi(optarg);
			break;
		case 'c':
			loop = atoi(optarg);
			break;
		case 't':
			test = atoi(optarg);
			break;
		case 's':
			server = 1;
			break;
		case 'a':
			active = verbose = 1;
			break;
		case 'i':
			idle = verbose = 1;
			break;
		case 'e':
			error = verbose = 1;
			break;
		case 'l':
			verbose = 1;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (test < 0 || timeout <= 0 || delay <= 0 || loop <= 0)
		return lst_print_usage(argv[0]);

	if (optind == argc) {
		batch = LST_DEFAULT_BATCH;
	} else if (optind == argc - 1) {
		batch = argv[optind];
	} else {
		return lst_print_usage(argv[0]);
	}


	INIT_LIST_HEAD(&head);

	if (verbose) {
		rc = lst_info_batch_ioctl(batch, test, server,
					  &ent, NULL, NULL, NULL);
		if (rc != 0) {
			fprintf(stderr, "Failed to query %s [%d]: %s\n",
				batch, test, strerror(errno));
			return -1;
		}

		count = server ? ent.tbe_srv_nle.nle_nnode :
				 ent.tbe_cli_nle.nle_nnode;
		if (count == 0) {
			fprintf(stdout, "Batch or test is empty\n");
			return 0;
		}
	}

	rc = lst_alloc_rpcent(&head, count, 0);
	if (rc != 0) {
		fprintf(stderr, "Out of memory\n");
		return rc;
	}

	for (i = 0; i < loop; i++) {
		time_t  now = time(NULL);

		if (now - last < delay) {
			sleep(delay - now + last);
			time(&now);
		}

		last = now;

		rc = lst_query_batch_ioctl(batch, test, server, timeout, &head);
		if (rc == -1) {
			fprintf(stderr, "Failed to query batch: %s\n",
				strerror(errno));
			break;
		}

		if (verbose) {
			/* Verbose mode */
			lst_print_tsb_verbose(&head, active, idle, error);
			continue;
		}

		fprintf(stdout, "%s [%d] ", batch, test);

		if (lstcon_rpc_stat_failure(&trans_stat, 0) != 0) {
			fprintf(stdout, "%d of %d nodes are unknown, ",
				lstcon_rpc_stat_failure(&trans_stat, 0),
				lstcon_rpc_stat_total(&trans_stat, 0));
		}

		if (lstcon_rpc_stat_failure(&trans_stat, 0) == 0 &&
		    lstcon_tsbqry_stat_run(&trans_stat, 0)  == 0  &&
		    lstcon_tsbqry_stat_failure(&trans_stat, 0) == 0) {
			fprintf(stdout, "is stopped\n");
			continue;
		}

		if (lstcon_rpc_stat_failure(&trans_stat, 0) == 0 &&
		    lstcon_tsbqry_stat_idle(&trans_stat, 0) == 0 &&
		    lstcon_tsbqry_stat_failure(&trans_stat, 0) == 0) {
			fprintf(stdout, "is running\n");
			continue;
		}

		fprintf(stdout, "stopped: %d , running: %d, failed: %d\n",
				lstcon_tsbqry_stat_idle(&trans_stat, 0),
				lstcon_tsbqry_stat_run(&trans_stat, 0),
				lstcon_tsbqry_stat_failure(&trans_stat, 0));
	}

	lst_free_rpcent(&head);

	return rc;
}

static int
lst_parse_distribute(char *dstr, int *dist, int *span)
{
	*dist = atoi(dstr);
	if (*dist <= 0)
		return -1;

	dstr = strchr(dstr, ':');
	if (dstr == NULL)
		return -1;

	*span = atoi(dstr + 1);
	if (*span <= 0)
		return -1;

	return 0;
}

static int
lst_get_bulk_param(int argc, char **argv, struct lst_test_bulk_param *bulk)
{
	char *tok = NULL;
	char *end = NULL;
	int rc = 0;
	int i = 0;

	bulk->blk_size  = 4096;
	bulk->blk_opc   = LST_BRW_READ;
	bulk->blk_flags = LST_BRW_CHECK_NONE;
	bulk->blk_srv_off = bulk->blk_cli_off = 0;

	while (i < argc) {
		if (strcasestr(argv[i], "check=") == argv[i] ||
		    strcasestr(argv[i], "c=") == argv[i]) {
			tok = strchr(argv[i], '=') + 1;

			if (strcasecmp(tok, "full") == 0) {
				bulk->blk_flags = LST_BRW_CHECK_FULL;
			} else if (strcasecmp(tok, "simple") == 0) {
				bulk->blk_flags = LST_BRW_CHECK_SIMPLE;
			} else {
				fprintf(stderr, "Unknow flag %s\n", tok);
				return -1;
			}

		} else if (strcasestr(argv[i], "size=") == argv[i] ||
			   strcasestr(argv[i], "s=") == argv[i]) {
			tok = strchr(argv[i], '=') + 1;

			bulk->blk_size = strtol(tok, &end, 0);
			if (bulk->blk_size <= 0) {
				fprintf(stderr, "Invalid size %s\n", tok);
				return -1;
			}

			if (end == NULL)
				return 0;

			if (*end == 'k' || *end == 'K')
				bulk->blk_size *= 1024;
			else if (*end == 'm' || *end == 'M')
				bulk->blk_size *= 1024 * 1024;

			if (bulk->blk_size > LNET_MTU) {
				fprintf(stderr, "Size exceed limitation: %d bytes\n",
					bulk->blk_size);
				return -1;
			}

		} else if (strcasestr(argv[i], "off=") == argv[i]) {
			int off;

			tok = strchr(argv[i], '=') + 1;

			off = strtol(tok, &end, 0);
			/* NB: align with sizeof(__u64) to simplify page
			 * checking implementation
			 */
			if (off < 0 || off % sizeof(__u64) != 0) {
				fprintf(stderr,
					"Invalid offset %s/%d, it should be postive value and multiple of %d\n",
					tok, off, (int)sizeof(__u64));
				return -1;
			}

			/* NB: blk_srv_off is reserved so far */
			bulk->blk_cli_off = bulk->blk_srv_off = off;
			if (end == NULL)
				return 0;

		} else if (strcasecmp(argv[i], "read") == 0 ||
			   strcasecmp(argv[i], "r") == 0) {
			bulk->blk_opc = LST_BRW_READ;

		} else if (strcasecmp(argv[i], "write") == 0 ||
			   strcasecmp(argv[i], "w") == 0) {
			bulk->blk_opc = LST_BRW_WRITE;

		} else {
			fprintf(stderr, "Unknow parameter: %s\n", argv[i]);
			return -1;
		}

		i++;
	}

	return rc;
}

static int
lst_get_test_param(char *test, int argc, char **argv, void **param, int *plen)
{
	struct lst_test_bulk_param *bulk = NULL;
	struct lst_test_ping_param *ping = NULL;
	int type;

	type = lst_test_name2type(test);
	if (type < 0) {
		fprintf(stderr, "Unknow test name %s\n", test);
		return -1;
	}

	switch (type) {
	case LST_TEST_PING:
		/* unused but needs for kernel part */
		ping = malloc(sizeof(*ping));
		if (ping == NULL) {
			fprintf(stderr, "Out of memory\n");
			return -1;
		}
		memset(ping, 0, sizeof(*ping));

		*param = ping;
		*plen  = sizeof(*ping);

		break;

	case LST_TEST_BULK:
		bulk = malloc(sizeof(*bulk));
		if (bulk == NULL) {
			fprintf(stderr, "Out of memory\n");
			return -1;
		}

		memset(bulk, 0, sizeof(*bulk));

		if (lst_get_bulk_param(argc, argv, bulk) != 0) {
			free(bulk);
			return -1;
		}
		*param = bulk;
		*plen  = sizeof(*bulk);
		break;
	default:
		break;
	}

	/* TODO: parse more parameter */
	return type;
}

static int
lst_add_test_ioctl(char *batch, int type, int loop, int concur,
		   int dist, int span, char *sgrp, char *dgrp,
		   void *param, int plen, int *retp, struct list_head *resultp)
{
	struct lstio_test_args args = { 0 };

	args.lstio_tes_key        = session_key;
	args.lstio_tes_bat_nmlen  = strlen(batch);
	args.lstio_tes_bat_name   = batch;
	args.lstio_tes_type       = type;
	args.lstio_tes_oneside    = 0;
	args.lstio_tes_loop       = loop;
	args.lstio_tes_concur     = concur;
	args.lstio_tes_dist       = dist;
	args.lstio_tes_span       = span;
	args.lstio_tes_sgrp_nmlen = strlen(sgrp);
	args.lstio_tes_sgrp_name  = sgrp;
	args.lstio_tes_dgrp_nmlen = strlen(dgrp);
	args.lstio_tes_dgrp_name  = dgrp;
	args.lstio_tes_param_len  = plen;
	args.lstio_tes_param      = param;
	args.lstio_tes_retp       = retp;
	args.lstio_tes_resultp    = resultp;

	return lst_ioctl(LSTIO_TEST_ADD, &args, sizeof(args));
}

static int
jt_lst_add_test(int argc, char **argv)
{
	struct list_head head;
	char *batch = NULL;
	char *test = NULL;
	char *dstr = NULL;
	char *from = NULL;
	char *to = NULL;
	void *param = NULL;
	int optidx = 0;
	int concur = 1;
	int loop = -1;
	int dist = 1;
	int span = 1;
	int plen = 0;
	int fcount = 0;
	int tcount = 0;
	int ret = 0;
	int type;
	int rc;
	int c;

	static const struct option add_test_opts[] = {
	{ .name = "batch",	 .has_arg = required_argument, .val = 'b' },
	{ .name = "concurrency", .has_arg = required_argument, .val = 'c' },
	{ .name = "distribute",	 .has_arg = required_argument, .val = 'd' },
	{ .name = "from",	 .has_arg = required_argument, .val = 'f' },
	{ .name = "to",		 .has_arg = required_argument, .val = 't' },
	{ .name = "loop",	 .has_arg = required_argument, .val = 'l' },
	{ .name = NULL } };

	if (session_key == 0) {
		fprintf(stderr,
			"Can't find env LST_SESSION or value is not valid\n");
		return -1;
	}

	while (1) {
		c = getopt_long(argc, argv, "b:c:d:f:l:t:",
				add_test_opts, &optidx);

		/* Detect the end of the options. */
		if (c == -1)
			break;

		switch (c) {
		case 'b':
			batch = optarg;
			break;
		case 'c':
			concur = atoi(optarg);
			break;
		case 'd':
			dstr = optarg;
			break;
		case 'f':
			from = optarg;
			break;
		case 'l':
			loop = atoi(optarg);
			break;
		case 't':
			to = optarg;
			break;
		default:
			return lst_print_usage(argv[0]);
		}
	}

	if (optind == argc || from == NULL || to == NULL)
		return lst_print_usage(argv[0]);

	if (concur <= 0 || concur > LST_MAX_CONCUR) {
		fprintf(stderr, "Invalid concurrency of test: %d\n", concur);
		return -1;
	}

	if (batch == NULL)
		batch = LST_DEFAULT_BATCH;

	if (dstr != NULL) {
		rc = lst_parse_distribute(dstr, &dist, &span);
		if (rc != 0) {
			fprintf(stderr, "Invalid distribution: %s\n", dstr);
			return -1;
		}
	}

	test = argv[optind++];

	argc -= optind;
	argv += optind;

	type = lst_get_test_param(test, argc, argv, &param, &plen);
	if (type < 0) {
		fprintf(stderr, "Failed to add test (%s)\n", test);
		return -1;
	}

	INIT_LIST_HEAD(&head);

	rc = lst_get_node_count(LST_OPC_GROUP, from, &fcount, NULL);
	if (rc != 0) {
		fprintf(stderr, "Can't get count of nodes from %s: %s\n",
			from, strerror(errno));
		goto out;
	}

	rc = lst_get_node_count(LST_OPC_GROUP, to, &tcount, NULL);
	if (rc != 0) {
		fprintf(stderr, "Can't get count of nodes from %s: %s\n",
			to, strerror(errno));
		goto out;
	}

	rc = lst_alloc_rpcent(&head, fcount > tcount ? fcount : tcount, 0);
	if (rc != 0) {
		fprintf(stderr, "Out of memory\n");
		goto out;
	}

	rc = lst_add_test_ioctl(batch, type, loop, concur,
				dist, span, from, to, param, plen, &ret, &head);

	if (rc == 0) {
		fprintf(stdout, "Test was added successfully\n");
		if (ret != 0) {
			fprintf(stdout,
				"Server group contains userland test nodes, old version of tcplnd can't accept connection request\n");
		}

		goto out;
	}

	if (rc == -1) {
		lst_print_error("test", "Failed to add test: %s\n",
				strerror(errno));
		goto out;
	}

	lst_print_transerr(&head, "add test");
out:
	lst_free_rpcent(&head);

	if (param != NULL)
		free(param);

	return rc;
}

static command_t lst_cmdlist[] = {
	{"new_session", jt_lst_new_session, NULL,
	 "Usage: lst new_session [--timeout TIME] [--force] [NAME]"},
	{"end_session", jt_lst_end_session, NULL,
	 "Usage: lst end_session" },
	{"show_session", jt_lst_show_session, NULL,
	 "Usage: lst show_session" },
	{"ping", jt_lst_ping, NULL,
	 "Usage: lst ping  [--group NAME] [--batch NAME] [--session] "
	 " [--nodes IDS]" },
	{"add_group", jt_lst_add_group, NULL,
	 "Usage: lst group NAME IDs [IDs]..." },
	{"del_group", jt_lst_del_group, NULL,
	 "Usage: lst del_group NAME" },
	{"update_group", jt_lst_update_group, NULL,
	 "Usage: lst update_group NAME [--clean] [--refresh] [--remove IDs]" },
	{"list_group", jt_lst_list_group, NULL,
	 "Usage: lst list_group [--active] [--busy] [--down] [--unknown] "
	 "GROUP ..." },
	{"stat", jt_lst_stat, NULL,
	 "Usage: lst stat [--bw] [--rate] [--read] [--write] [--max] [--min] "
	 " [--avg] [--mbs] [--timeout #] [--delay #] [--count #] GROUP [GROUP]"
	},
	{"show_error", jt_lst_show_error, NULL,
	 "Usage: lst show_error NAME | IDS ..." },
	{"add_batch", jt_lst_add_batch, NULL,
	 "Usage: lst add_batch NAME" },
	{"run", jt_lst_start_batch, NULL,
	 "Usage: lst run [--timeout TIME] [NAME]" },
	{"stop", jt_lst_stop_batch, NULL,
	 "Usage: lst stop [--force] BATCH_NAME" },
	{"list_batch", jt_lst_list_batch, NULL,
	 "Usage: lst list_batch NAME [--test ID] [--server]" },
	{"query", jt_lst_query_batch, NULL,
	 "Usage: lst query [--test ID] [--server] [--timeout TIME] NAME" },
	{"add_test", jt_lst_add_test, NULL,
	 "Usage: lst add_test [--batch BATCH] [--loop #] [--concurrency #] "
	 " [--distribute #:#] [--from GROUP] [--to GROUP] TEST..." },
	{0, 0, 0, NULL }
};

static int
lst_initialize(void)
{
	char *key;
	char *feats;

	feats = getenv("LST_FEATURES");
	if (feats != NULL)
		session_features = strtol(feats, NULL, 16);

	if ((session_features & ~LST_FEATS_MASK) != 0) {
		fprintf(stderr,
			"Unsupported session features %x, only support these features so far: %x\n",
			(session_features & ~LST_FEATS_MASK), LST_FEATS_MASK);
		return -1;
	}

	key = getenv("LST_SESSION");

	if (key == NULL) {
		session_key = 0;
		return 0;
	}

	session_key = atoi(key);

	return 0;
}

static int
lst_print_usage(char *cmd)
{
	char *argv[] = { "help", cmd };

	return cfs_parser(2, argv, lst_cmdlist);
}

int main(int argc, char **argv)
{
	int rc = 0;

	setlinebuf(stdout);

	rc = lst_initialize();
	if (rc < 0)
		goto errorout;

	rc = lustre_lnet_config_lib_init();
	if (rc < 0)
		goto errorout;

	rc = cfs_parser(argc, argv, lst_cmdlist);

errorout:
	return rc;
}