rdma/dev.c - manifest_repos/iproute2 - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 /*
  * dev.c	RDMA tool
  * Authors:     Leon Romanovsky <leonro@mellanox.com>
  */

 #include <fcntl.h>
 #include "rdma.h"

 static int dev_help(struct rd *rd)
 {
 	pr_out("Usage: %s dev show [DEV]\n", rd->filename);
 	pr_out("       %s dev set [DEV] name DEVNAME\n", rd->filename);
 	pr_out("       %s dev set [DEV] netns NSNAME\n", rd->filename);
 	pr_out("       %s dev set [DEV] adaptive-moderation [on|off]\n", rd->filename);
 	return 0;
 }

 static const char *dev_caps_to_str(uint32_t idx)
 {
 #define RDMA_DEV_FLAGS_LOW(x) \
 	x(RESIZE_MAX_WR, 0) \
 	x(BAD_PKEY_CNTR, 1) \
 	x(BAD_QKEY_CNTR, 2) \
 	x(RAW_MULTI, 3) \
 	x(AUTO_PATH_MIG, 4) \
 	x(CHANGE_PHY_PORT, 5) \
 	x(UD_AV_PORT_ENFORCE_PORT_ENFORCE, 6) \
 	x(CURR_QP_STATE_MOD, 7) \
 	x(SHUTDOWN_PORT, 8) \
 	x(INIT_TYPE, 9) \
 	x(PORT_ACTIVE_EVENT, 10) \
 	x(SYS_IMAGE_GUID, 11) \
 	x(RC_RNR_NAK_GEN, 12) \
 	x(SRQ_RESIZE, 13) \
 	x(N_NOTIFY_CQ, 14) \
 	x(LOCAL_DMA_LKEY, 15) \
 	x(MEM_WINDOW, 17) \
 	x(UD_IP_CSUM, 18) \
 	x(UD_TSO, 19) \
 	x(XRC, 20) \
 	x(MEM_MGT_EXTENSIONS, 21) \
 	x(BLOCK_MULTICAST_LOOPBACK, 22) \
 	x(MEM_WINDOW_TYPE_2A, 23) \
 	x(MEM_WINDOW_TYPE_2B, 24) \
 	x(RC_IP_CSUM, 25) \
 	x(RAW_IP_CSUM, 26) \
 	x(CROSS_CHANNEL, 27) \
 	x(MANAGED_FLOW_STEERING, 29) \
 	x(SIGNATURE_HANDOVER, 30) \
 	x(ON_DEMAND_PAGING, 31)

 #define RDMA_DEV_FLAGS_HIGH(x) \
 	x(SG_GAPS_REG, 0) \
 	x(VIRTUAL_FUNCTION, 1) \
 	x(RAW_SCATTER_FCS, 2) \
 	x(RDMA_NETDEV_OPA_VNIC, 3) \
 	x(PCI_WRITE_END_PADDING, 4)

 	/*
 	 * Separation below is needed to allow compilation of rdmatool
 	 * on 32bits systems. On such systems, C-enum is limited to be
 	 * int and can't hold more than 32 bits.
 	 */
 	enum { RDMA_DEV_FLAGS_LOW(RDMA_BITMAP_ENUM) };
 	enum { RDMA_DEV_FLAGS_HIGH(RDMA_BITMAP_ENUM) };

 	static const char * const
 		rdma_dev_names_low[] = { RDMA_DEV_FLAGS_LOW(RDMA_BITMAP_NAMES) };
 	static const char * const
 		rdma_dev_names_high[] = { RDMA_DEV_FLAGS_HIGH(RDMA_BITMAP_NAMES) };
 	uint32_t high_idx;
 	#undef RDMA_DEV_FLAGS_LOW
 	#undef RDMA_DEV_FLAGS_HIGH

 	if (idx < ARRAY_SIZE(rdma_dev_names_low) && rdma_dev_names_low[idx])
 		return rdma_dev_names_low[idx];

 	high_idx = idx - ARRAY_SIZE(rdma_dev_names_low);
 	if (high_idx <  ARRAY_SIZE(rdma_dev_names_high) &&
 	    rdma_dev_names_high[high_idx])
 		return rdma_dev_names_high[high_idx];

 	return "UNKNOWN";
 }

 static void dev_print_caps(struct rd *rd, struct nlattr **tb)
 {
 	uint64_t caps;
 	uint32_t idx;

 	if (!tb[RDMA_NLDEV_ATTR_CAP_FLAGS])
 		return;

 	caps = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_CAP_FLAGS]);

 	if (rd->json_output) {
 		jsonw_name(rd->jw, "caps");
 		jsonw_start_array(rd->jw);
 	} else {
 		pr_out("\n    caps: <");
 	}
 	for (idx = 0; caps; idx++) {
 		if (caps & 0x1) {
 			if (rd->json_output) {
 				jsonw_string(rd->jw, dev_caps_to_str(idx));
 			} else {
 				pr_out("%s", dev_caps_to_str(idx));
 				if (caps >> 0x1)
 					pr_out(", ");
 			}
 		}
 		caps >>= 0x1;
 	}

 	if (rd->json_output)
 		jsonw_end_array(rd->jw);
 	else
 		pr_out(">");
 }

 static void dev_print_fw(struct rd *rd, struct nlattr **tb)
 {
 	const char *str;
 	if (!tb[RDMA_NLDEV_ATTR_FW_VERSION])
 		return;

 	str = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_FW_VERSION]);
 	if (rd->json_output)
 		jsonw_string_field(rd->jw, "fw", str);
 	else
 		pr_out("fw %s ", str);
 }

 static void dev_print_node_guid(struct rd *rd, struct nlattr **tb)
 {
 	uint64_t node_guid;
 	uint16_t vp[4];
 	char str[32];

 	if (!tb[RDMA_NLDEV_ATTR_NODE_GUID])
 		return;

 	node_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_NODE_GUID]);
 	memcpy(vp, &node_guid, sizeof(uint64_t));
 	snprintf(str, 32, "%04x:%04x:%04x:%04x", vp[3], vp[2], vp[1], vp[0]);
 	if (rd->json_output)
 		jsonw_string_field(rd->jw, "node_guid", str);
 	else
 		pr_out("node_guid %s ", str);
 }

 static void dev_print_sys_image_guid(struct rd *rd, struct nlattr **tb)
 {
 	uint64_t sys_image_guid;
 	uint16_t vp[4];
 	char str[32];

 	if (!tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID])
 		return;

 	sys_image_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID]);
 	memcpy(vp, &sys_image_guid, sizeof(uint64_t));
 	snprintf(str, 32, "%04x:%04x:%04x:%04x", vp[3], vp[2], vp[1], vp[0]);
 	if (rd->json_output)
 		jsonw_string_field(rd->jw, "sys_image_guid", str);
 	else
 		pr_out("sys_image_guid %s ", str);
 }

 static void dev_print_dim_setting(struct rd *rd, struct nlattr **tb)
 {
 	uint8_t dim_setting;

 	if (!tb[RDMA_NLDEV_ATTR_DEV_DIM])
 		return;

 	dim_setting = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
 	if (dim_setting > 1)
 		return;

 	print_on_off(rd, "adaptive-moderation", dim_setting);

 }

 static const char *node_type_to_str(uint8_t node_type)
 {
 	static const char * const node_type_str[] = { "unknown", "ca",
 						      "switch", "router",
 						      "rnic", "usnic",
 						      "usnic_udp",
 						      "unspecified" };
 	if (node_type < ARRAY_SIZE(node_type_str))
 		return node_type_str[node_type];
 	return "unknown";
 }

 static void dev_print_node_type(struct rd *rd, struct nlattr **tb)
 {
 	const char *node_str;
 	uint8_t node_type;

 	if (!tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE])
 		return;

 	node_type = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE]);
 	node_str = node_type_to_str(node_type);
 	if (rd->json_output)
 		jsonw_string_field(rd->jw, "node_type", node_str);
 	else
 		pr_out("node_type %s ", node_str);
 }

 static int dev_parse_cb(const struct nlmsghdr *nlh, void *data)
 {
 	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
 	struct rd *rd = data;
 	const char *name;
 	uint32_t idx;

 	mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
 	if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME])
 		return MNL_CB_ERROR;

 	idx =  mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 	name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 	if (rd->json_output) {
 		jsonw_uint_field(rd->jw, "ifindex", idx);
 		jsonw_string_field(rd->jw, "ifname", name);
 	} else {
 		pr_out("%u: %s: ", idx, name);
 	}

 	dev_print_node_type(rd, tb);
 	dev_print_fw(rd, tb);
 	dev_print_node_guid(rd, tb);
 	dev_print_sys_image_guid(rd, tb);
 	if (rd->show_details) {
 		dev_print_dim_setting(rd, tb);
 		dev_print_caps(rd, tb);
 	}

 	if (!rd->json_output)
 		pr_out("\n");
 	return MNL_CB_OK;
 }

 static int dev_no_args(struct rd *rd)
 {
 	uint32_t seq;
 	int ret;

 	rd_prepare_msg(rd, RDMA_NLDEV_CMD_GET,
 		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
 	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
 	ret = rd_send_msg(rd);
 	if (ret)
 		return ret;

 	if (rd->json_output)
 		jsonw_start_object(rd->jw);
 	ret = rd_recv_msg(rd, dev_parse_cb, rd, seq);
 	if (rd->json_output)
 		jsonw_end_object(rd->jw);
 	return ret;
 }

 static int dev_one_show(struct rd *rd)
 {
 	const struct rd_cmd cmds[] = {
 		{ NULL,		dev_no_args},
 		{ 0 }
 	};

 	return rd_exec_cmd(rd, cmds, "parameter");
 }

 static int dev_set_name(struct rd *rd)
 {
 	uint32_t seq;

 	if (rd_no_arg(rd)) {
 		pr_err("Please provide device new name.\n");
 		return -EINVAL;
 	}

 	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET,
 		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
 	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
 	mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_DEV_NAME, rd_argv(rd));

 	return rd_sendrecv_msg(rd, seq);
 }

 static int dev_set_netns(struct rd *rd)
 {
 	char *netns_path;
 	uint32_t seq;
 	int netns;
 	int ret;

 	if (rd_no_arg(rd)) {
 		pr_err("Please provide device name.\n");
 		return -EINVAL;
 	}

 	if (asprintf(&netns_path, "%s/%s", NETNS_RUN_DIR, rd_argv(rd)) < 0)
 		return -ENOMEM;

 	netns = open(netns_path, O_RDONLY | O_CLOEXEC);
 	if (netns < 0) {
 		fprintf(stderr, "Cannot open network namespace \"%s\": %s\n",
 			rd_argv(rd), strerror(errno));
 		ret = -EINVAL;
 		goto done;
 	}

 	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET,
 		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
 	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
 	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_NET_NS_FD, netns);
 	ret = rd_sendrecv_msg(rd, seq);
 	close(netns);
 done:
 	free(netns_path);
 	return ret;
 }

 static int dev_set_dim_sendmsg(struct rd *rd, uint8_t dim_setting)
 {
 	uint32_t seq;

 	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET, &seq,
 		       (NLM_F_REQUEST | NLM_F_ACK));
 	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
 	mnl_attr_put_u8(rd->nlh, RDMA_NLDEV_ATTR_DEV_DIM, dim_setting);

 	return rd_sendrecv_msg(rd, seq);
 }

 static int dev_set_dim_off(struct rd *rd)
 {
 	return dev_set_dim_sendmsg(rd, 0);
 }

 static int dev_set_dim_on(struct rd *rd)
 {
 	return dev_set_dim_sendmsg(rd, 1);
 }

 static int dev_set_dim(struct rd *rd)
 {
 	const struct rd_cmd cmds[] = {
 		{ NULL,		dev_help},
 		{ "on",		dev_set_dim_on},
 		{ "off",	dev_set_dim_off},
 		{ 0 }
 	};

 	return rd_exec_cmd(rd, cmds, "parameter");
 }

 static int dev_one_set(struct rd *rd)
 {
 	const struct rd_cmd cmds[] = {
 		{ NULL,		dev_help},
 		{ "name",	dev_set_name},
 		{ "netns",	dev_set_netns},
 		{ "adaptive-moderation",	dev_set_dim},
 		{ 0 }
 	};

 	return rd_exec_cmd(rd, cmds, "parameter");
 }

 static int dev_show(struct rd *rd)
 {
 	return rd_exec_dev(rd, dev_one_show);
 }

 static int dev_set(struct rd *rd)
 {
 	return rd_exec_require_dev(rd, dev_one_set);
 }

 int cmd_dev(struct rd *rd)
 {
 	const struct rd_cmd cmds[] = {
 		{ NULL,		dev_show },
 		{ "show",	dev_show },
 		{ "list",	dev_show },
 		{ "set",	dev_set },
 		{ "help",	dev_help },
 		{ 0 }
 	};

 	return rd_exec_cmd(rd, cmds, "dev command");
 }
	// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
	/*
	* dev.c RDMA tool
	* Authors: Leon Romanovsky <leonro@mellanox.com>
	*/

	#include <fcntl.h>
	#include "rdma.h"

	static int dev_help(struct rd *rd)
	{
	pr_out("Usage: %s dev show [DEV]\n", rd->filename);
	pr_out(" %s dev set [DEV] name DEVNAME\n", rd->filename);
	pr_out(" %s dev set [DEV] netns NSNAME\n", rd->filename);
	pr_out(" %s dev set [DEV] adaptive-moderation [on\|off]\n", rd->filename);
	return 0;
	}

	static const char *dev_caps_to_str(uint32_t idx)
	{
	#define RDMA_DEV_FLAGS_LOW(x) \
	x(RESIZE_MAX_WR, 0) \
	x(BAD_PKEY_CNTR, 1) \
	x(BAD_QKEY_CNTR, 2) \
	x(RAW_MULTI, 3) \
	x(AUTO_PATH_MIG, 4) \
	x(CHANGE_PHY_PORT, 5) \
	x(UD_AV_PORT_ENFORCE_PORT_ENFORCE, 6) \
	x(CURR_QP_STATE_MOD, 7) \
	x(SHUTDOWN_PORT, 8) \
	x(INIT_TYPE, 9) \
	x(PORT_ACTIVE_EVENT, 10) \
	x(SYS_IMAGE_GUID, 11) \
	x(RC_RNR_NAK_GEN, 12) \
	x(SRQ_RESIZE, 13) \
	x(N_NOTIFY_CQ, 14) \
	x(LOCAL_DMA_LKEY, 15) \
	x(MEM_WINDOW, 17) \
	x(UD_IP_CSUM, 18) \
	x(UD_TSO, 19) \
	x(XRC, 20) \
	x(MEM_MGT_EXTENSIONS, 21) \
	x(BLOCK_MULTICAST_LOOPBACK, 22) \
	x(MEM_WINDOW_TYPE_2A, 23) \
	x(MEM_WINDOW_TYPE_2B, 24) \
	x(RC_IP_CSUM, 25) \
	x(RAW_IP_CSUM, 26) \
	x(CROSS_CHANNEL, 27) \
	x(MANAGED_FLOW_STEERING, 29) \
	x(SIGNATURE_HANDOVER, 30) \
	x(ON_DEMAND_PAGING, 31)

	#define RDMA_DEV_FLAGS_HIGH(x) \
	x(SG_GAPS_REG, 0) \
	x(VIRTUAL_FUNCTION, 1) \
	x(RAW_SCATTER_FCS, 2) \
	x(RDMA_NETDEV_OPA_VNIC, 3) \
	x(PCI_WRITE_END_PADDING, 4)

	/*
	* Separation below is needed to allow compilation of rdmatool
	* on 32bits systems. On such systems, C-enum is limited to be
	* int and can't hold more than 32 bits.
	*/
	enum { RDMA_DEV_FLAGS_LOW(RDMA_BITMAP_ENUM) };
	enum { RDMA_DEV_FLAGS_HIGH(RDMA_BITMAP_ENUM) };

	static const char * const
	rdma_dev_names_low[] = { RDMA_DEV_FLAGS_LOW(RDMA_BITMAP_NAMES) };
	static const char * const
	rdma_dev_names_high[] = { RDMA_DEV_FLAGS_HIGH(RDMA_BITMAP_NAMES) };
	uint32_t high_idx;
	#undef RDMA_DEV_FLAGS_LOW
	#undef RDMA_DEV_FLAGS_HIGH

	if (idx < ARRAY_SIZE(rdma_dev_names_low) && rdma_dev_names_low[idx])
	return rdma_dev_names_low[idx];

	high_idx = idx - ARRAY_SIZE(rdma_dev_names_low);
	if (high_idx < ARRAY_SIZE(rdma_dev_names_high) &&
	rdma_dev_names_high[high_idx])
	return rdma_dev_names_high[high_idx];

	return "UNKNOWN";
	}

	static void dev_print_caps(struct rd rd, struct nlattr *tb)
	{
	uint64_t caps;
	uint32_t idx;

	if (!tb[RDMA_NLDEV_ATTR_CAP_FLAGS])
	return;

	caps = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_CAP_FLAGS]);

	if (rd->json_output) {
	jsonw_name(rd->jw, "caps");
	jsonw_start_array(rd->jw);
	} else {
	pr_out("\n caps: <");
	}
	for (idx = 0; caps; idx++) {
	if (caps & 0x1) {
	if (rd->json_output) {
	jsonw_string(rd->jw, dev_caps_to_str(idx));
	} else {
	pr_out("%s", dev_caps_to_str(idx));
	if (caps >> 0x1)
	pr_out(", ");
	}
	}
	caps >>= 0x1;
	}

	if (rd->json_output)
	jsonw_end_array(rd->jw);
	else
	pr_out(">");
	}

	static void dev_print_fw(struct rd rd, struct nlattr *tb)
	{
	const char *str;
	if (!tb[RDMA_NLDEV_ATTR_FW_VERSION])
	return;

	str = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_FW_VERSION]);
	if (rd->json_output)
	jsonw_string_field(rd->jw, "fw", str);
	else
	pr_out("fw %s ", str);
	}

	static void dev_print_node_guid(struct rd rd, struct nlattr *tb)
	{
	uint64_t node_guid;
	uint16_t vp[4];
	char str[32];

	if (!tb[RDMA_NLDEV_ATTR_NODE_GUID])
	return;

	node_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_NODE_GUID]);
	memcpy(vp, &node_guid, sizeof(uint64_t));
	snprintf(str, 32, "%04x:%04x:%04x:%04x", vp[3], vp[2], vp[1], vp[0]);
	if (rd->json_output)
	jsonw_string_field(rd->jw, "node_guid", str);
	else
	pr_out("node_guid %s ", str);
	}

	static void dev_print_sys_image_guid(struct rd rd, struct nlattr *tb)
	{
	uint64_t sys_image_guid;
	uint16_t vp[4];
	char str[32];

	if (!tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID])
	return;

	sys_image_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID]);
	memcpy(vp, &sys_image_guid, sizeof(uint64_t));
	snprintf(str, 32, "%04x:%04x:%04x:%04x", vp[3], vp[2], vp[1], vp[0]);
	if (rd->json_output)
	jsonw_string_field(rd->jw, "sys_image_guid", str);
	else
	pr_out("sys_image_guid %s ", str);
	}

	static void dev_print_dim_setting(struct rd rd, struct nlattr *tb)
	{
	uint8_t dim_setting;

	if (!tb[RDMA_NLDEV_ATTR_DEV_DIM])
	return;

	dim_setting = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
	if (dim_setting > 1)
	return;

	print_on_off(rd, "adaptive-moderation", dim_setting);

	}

	static const char *node_type_to_str(uint8_t node_type)
	{
	static const char * const node_type_str[] = { "unknown", "ca",
	"switch", "router",
	"rnic", "usnic",
	"usnic_udp",
	"unspecified" };
	if (node_type < ARRAY_SIZE(node_type_str))
	return node_type_str[node_type];
	return "unknown";
	}

	static void dev_print_node_type(struct rd rd, struct nlattr *tb)
	{
	const char *node_str;
	uint8_t node_type;

	if (!tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE])
	return;

	node_type = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE]);
	node_str = node_type_to_str(node_type);
	if (rd->json_output)
	jsonw_string_field(rd->jw, "node_type", node_str);
	else
	pr_out("node_type %s ", node_str);
	}

	static int dev_parse_cb(const struct nlmsghdr nlh, void data)
	{
	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
	struct rd *rd = data;
	const char *name;
	uint32_t idx;

	mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
	if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] \|\| !tb[RDMA_NLDEV_ATTR_DEV_NAME])
	return MNL_CB_ERROR;

	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
	name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
	if (rd->json_output) {
	jsonw_uint_field(rd->jw, "ifindex", idx);
	jsonw_string_field(rd->jw, "ifname", name);
	} else {
	pr_out("%u: %s: ", idx, name);
	}

	dev_print_node_type(rd, tb);
	dev_print_fw(rd, tb);
	dev_print_node_guid(rd, tb);
	dev_print_sys_image_guid(rd, tb);
	if (rd->show_details) {
	dev_print_dim_setting(rd, tb);
	dev_print_caps(rd, tb);
	}

	if (!rd->json_output)
	pr_out("\n");
	return MNL_CB_OK;
	}

	static int dev_no_args(struct rd *rd)
	{
	uint32_t seq;
	int ret;

	rd_prepare_msg(rd, RDMA_NLDEV_CMD_GET,
	&seq, (NLM_F_REQUEST \| NLM_F_ACK));
	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
	ret = rd_send_msg(rd);
	if (ret)
	return ret;

	if (rd->json_output)
	jsonw_start_object(rd->jw);
	ret = rd_recv_msg(rd, dev_parse_cb, rd, seq);
	if (rd->json_output)
	jsonw_end_object(rd->jw);
	return ret;
	}

	static int dev_one_show(struct rd *rd)
	{
	const struct rd_cmd cmds[] = {
	{ NULL, dev_no_args},
	{ 0 }
	};

	return rd_exec_cmd(rd, cmds, "parameter");
	}

	static int dev_set_name(struct rd *rd)
	{
	uint32_t seq;

	if (rd_no_arg(rd)) {
	pr_err("Please provide device new name.\n");
	return -EINVAL;
	}

	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET,
	&seq, (NLM_F_REQUEST \| NLM_F_ACK));
	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
	mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_DEV_NAME, rd_argv(rd));

	return rd_sendrecv_msg(rd, seq);
	}

	static int dev_set_netns(struct rd *rd)
	{
	char *netns_path;
	uint32_t seq;
	int netns;
	int ret;

	if (rd_no_arg(rd)) {
	pr_err("Please provide device name.\n");
	return -EINVAL;
	}

	if (asprintf(&netns_path, "%s/%s", NETNS_RUN_DIR, rd_argv(rd)) < 0)
	return -ENOMEM;

	netns = open(netns_path, O_RDONLY \| O_CLOEXEC);
	if (netns < 0) {
	fprintf(stderr, "Cannot open network namespace \"%s\": %s\n",
	rd_argv(rd), strerror(errno));
	ret = -EINVAL;
	goto done;
	}

	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET,
	&seq, (NLM_F_REQUEST \| NLM_F_ACK));
	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_NET_NS_FD, netns);
	ret = rd_sendrecv_msg(rd, seq);
	close(netns);
	done:
	free(netns_path);
	return ret;
	}

	static int dev_set_dim_sendmsg(struct rd *rd, uint8_t dim_setting)
	{
	uint32_t seq;

	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET, &seq,
	(NLM_F_REQUEST \| NLM_F_ACK));
	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
	mnl_attr_put_u8(rd->nlh, RDMA_NLDEV_ATTR_DEV_DIM, dim_setting);

	return rd_sendrecv_msg(rd, seq);
	}

	static int dev_set_dim_off(struct rd *rd)
	{
	return dev_set_dim_sendmsg(rd, 0);
	}

	static int dev_set_dim_on(struct rd *rd)
	{
	return dev_set_dim_sendmsg(rd, 1);
	}

	static int dev_set_dim(struct rd *rd)
	{
	const struct rd_cmd cmds[] = {
	{ NULL, dev_help},
	{ "on", dev_set_dim_on},
	{ "off", dev_set_dim_off},
	{ 0 }
	};

	return rd_exec_cmd(rd, cmds, "parameter");
	}

	static int dev_one_set(struct rd *rd)
	{
	const struct rd_cmd cmds[] = {
	{ NULL, dev_help},
	{ "name", dev_set_name},
	{ "netns", dev_set_netns},
	{ "adaptive-moderation", dev_set_dim},
	{ 0 }
	};

	return rd_exec_cmd(rd, cmds, "parameter");
	}

	static int dev_show(struct rd *rd)
	{
	return rd_exec_dev(rd, dev_one_show);
	}

	static int dev_set(struct rd *rd)
	{
	return rd_exec_require_dev(rd, dev_one_set);
	}

	int cmd_dev(struct rd *rd)
	{
	const struct rd_cmd cmds[] = {
	{ NULL, dev_show },
	{ "show", dev_show },
	{ "list", dev_show },
	{ "set", dev_set },
	{ "help", dev_help },
	{ 0 }
	};

	return rd_exec_cmd(rd, cmds, "dev command");
	}