[mirror_iproute2.git] / rdma / link.c

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

#include "rdma.h"

static int link_help(struct rd *rd)
{
	pr_out("Usage: %s link show [DEV/PORT_INDEX]\n", rd->filename);
	return 0;
}

static const char *caps_to_str(uint32_t idx)
{
#define RDMA_PORT_FLAGS_LOW(x) \
	x(RESERVED, 0) \
	x(SM, 1) \
	x(NOTICE, 2) \
	x(TRAP, 3) \
	x(OPT_IPD, 4) \
	x(AUTO_MIGR, 5) \
	x(SL_MAP, 6) \
	x(MKEY_NVRAM, 7) \
	x(PKEY_NVRAM, 8) \
	x(LED_INFO, 9) \
	x(SM_DISABLED, 10) \
	x(SYS_IMAGE_GUID, 11) \
	x(PKEY_SW_EXT_PORT_TRAP, 12) \
	x(CABLE_INFO, 13) \
	x(EXTENDED_SPEEDS, 14) \
	x(CAP_MASK2, 15) \
	x(CM, 16) \
	x(SNMP_TUNNEL, 17) \
	x(REINIT, 18) \
	x(DEVICE_MGMT, 19) \
	x(VENDOR_CLASS, 20) \
	x(DR_NOTICE, 21) \
	x(CAP_MASK_NOTICE, 22) \
	x(BOOT_MGMT, 23) \
	x(LINK_LATENCY, 24) \
	x(CLIENT_REG, 25) \
	x(OTHER_LOCAL_CHANGES, 26) \
	x(LINK_SPPED_WIDTH, 27) \
	x(VENDOR_SPECIFIC_MADS, 28) \
	x(MULT_PKER_TRAP, 29) \
	x(MULT_FDB, 30) \
	x(HIERARCHY_INFO, 31)

#define RDMA_PORT_FLAGS_HIGH(x) \
	x(SET_NODE_DESC, 0) \
	x(EXT_INFO, 1) \
	x(VIRT, 2) \
	x(SWITCH_POR_STATE_TABLE, 3) \
	x(LINK_WIDTH_2X, 4) \
	x(LINK_SPEED_HDR, 5)

	/*
	 * 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_PORT_FLAGS_LOW(RDMA_BITMAP_ENUM) };
	enum { RDMA_PORT_FLAGS_HIGH(RDMA_BITMAP_ENUM) };

	static const char * const
		rdma_port_names_low[] = { RDMA_PORT_FLAGS_LOW(RDMA_BITMAP_NAMES) };
	static const char * const
		rdma_port_names_high[] = { RDMA_PORT_FLAGS_HIGH(RDMA_BITMAP_NAMES) };
	uint32_t high_idx;
	#undef RDMA_PORT_FLAGS_LOW
	#undef RDMA_PORT_FLAGS_HIGH

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

	high_idx = idx - ARRAY_SIZE(rdma_port_names_low);
	if (high_idx < ARRAY_SIZE(rdma_port_names_high) &&
	    rdma_port_names_high[high_idx])
		return rdma_port_names_high[high_idx];

	return "UNKNOWN";
}

static void link_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, caps_to_str(idx));
			} else {
				pr_out("%s", 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 link_print_subnet_prefix(struct rd *rd, struct nlattr **tb)
{
	uint64_t subnet_prefix;
	uint16_t vp[4];
	char str[32];

	if (!tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX])
		return;

	subnet_prefix = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX]);
	memcpy(vp, &subnet_prefix, 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, "subnet_prefix", str);
	else
		pr_out("subnet_prefix %s ", str);
}

static void link_print_lid(struct rd *rd, struct nlattr **tb)
{
	uint32_t lid;

	if (!tb[RDMA_NLDEV_ATTR_LID])
		return;

	lid = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_LID]);
	if (rd->json_output)
		jsonw_uint_field(rd->jw, "lid", lid);
	else
		pr_out("lid %u ", lid);
}

static void link_print_sm_lid(struct rd *rd, struct nlattr **tb)
{
	uint32_t sm_lid;

	if (!tb[RDMA_NLDEV_ATTR_SM_LID])
		return;

	sm_lid = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_SM_LID]);
	if (rd->json_output)
		jsonw_uint_field(rd->jw, "sm_lid", sm_lid);
	else
		pr_out("sm_lid %u ", sm_lid);
}

static void link_print_lmc(struct rd *rd, struct nlattr **tb)
{
	uint8_t lmc;

	if (!tb[RDMA_NLDEV_ATTR_LMC])
		return;

	lmc = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_LMC]);
	if (rd->json_output)
		jsonw_uint_field(rd->jw, "lmc", lmc);
	else
		pr_out("lmc %u ", lmc);
}

static const char *link_state_to_str(uint8_t link_state)
{
	static const char * const link_state_str[] = { "NOP", "DOWN",
						       "INIT", "ARMED",
						       "ACTIVE",
						       "ACTIVE_DEFER" };
	if (link_state < ARRAY_SIZE(link_state_str))
		return link_state_str[link_state];
	return "UNKNOWN";
}

static void link_print_state(struct rd *rd, struct nlattr **tb)
{
	uint8_t state;

	if (!tb[RDMA_NLDEV_ATTR_PORT_STATE])
		return;

	state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_STATE]);
	if (rd->json_output)
		jsonw_string_field(rd->jw, "state", link_state_to_str(state));
	else
		pr_out("state %s ", link_state_to_str(state));
}

static const char *phys_state_to_str(uint8_t phys_state)
{
	static const char * const phys_state_str[] = { "NOP", "SLEEP",
						       "POLLING", "DISABLED",
						       "ARMED", "LINK_UP",
						       "LINK_ERROR_RECOVER",
						       "PHY_TEST", "UNKNOWN",
						       "OPA_OFFLINE",
						       "UNKNOWN", "OPA_TEST" };
	if (phys_state < ARRAY_SIZE(phys_state_str))
		return phys_state_str[phys_state];
	return "UNKNOWN";
};

static void link_print_phys_state(struct rd *rd, struct nlattr **tb)
{
	uint8_t phys_state;

	if (!tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE])
		return;

	phys_state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE]);
	if (rd->json_output)
		jsonw_string_field(rd->jw, "physical_state",
				   phys_state_to_str(phys_state));
	else
		pr_out("physical_state %s ", phys_state_to_str(phys_state));
}

static void link_print_netdev(struct rd *rd, struct nlattr **tb)
{
	const char *netdev_name;
	uint32_t idx;

	if (!tb[RDMA_NLDEV_ATTR_NDEV_NAME] || !tb[RDMA_NLDEV_ATTR_NDEV_INDEX])
		return;

	netdev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_NDEV_NAME]);
	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_NDEV_INDEX]);
	if (rd->json_output) {
		jsonw_string_field(rd->jw, "netdev", netdev_name);
		jsonw_uint_field(rd->jw, "netdev_index", idx);
	} else {
		pr_out("netdev %s ", netdev_name);
		if (rd->show_details)
			pr_out("netdev_index %u ", idx);
	}
}

static int link_parse_cb(const struct nlmsghdr *nlh, void *data)
{
	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
	struct rd *rd = data;
	uint32_t port, idx;
	char name[32];

	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;

	if (!tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
		pr_err("This tool doesn't support switches yet\n");
		return MNL_CB_ERROR;
	}

	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
	port = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
	snprintf(name, 32, "%s/%u",
		 mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]), port);

	if (rd->json_output) {
		jsonw_uint_field(rd->jw, "ifindex", idx);
		jsonw_uint_field(rd->jw, "port", port);
		jsonw_string_field(rd->jw, "ifname", name);

	} else {
		pr_out("%u/%u: %s: ", idx, port, name);
	}

	link_print_subnet_prefix(rd, tb);
	link_print_lid(rd, tb);
	link_print_sm_lid(rd, tb);
	link_print_lmc(rd, tb);
	link_print_state(rd, tb);
	link_print_phys_state(rd, tb);
	link_print_netdev(rd, tb);
	if (rd->show_details)
		link_print_caps(rd, tb);

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

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

	rd_prepare_msg(rd, RDMA_NLDEV_CMD_PORT_GET, &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_ATTR_PORT_INDEX, rd->port_idx);
	ret = rd_send_msg(rd);
	if (ret)
		return ret;

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

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

	if (!rd->port_idx)
		return 0;

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

static int link_show(struct rd *rd)
{
	return rd_exec_link(rd, link_one_show, true);
}

int cmd_link(struct rd *rd)
{
	const struct rd_cmd cmds[] = {
		{ NULL,		link_show },
		{ "show",	link_show },
		{ "list",	link_show },
		{ "help",	link_help },
		{ 0 }
	};

	return rd_exec_cmd(rd, cmds, "link command");
}
Commit	Line	Data
835d8321	1	// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
da990ab4 LR	2	/*
da990ab4 LR	3	* link.c RDMA tool
da990ab4 LR	4	* Authors: Leon Romanovsky <leonro@mellanox.com>
	5	*/
	6
	7	#include "rdma.h"
	8
	9	static int link_help(struct rd *rd)
	10	{
	11	pr_out("Usage: %s link show [DEV/PORT_INDEX]\n", rd->filename);
	12	return 0;
	13	}
	14
	15	static const char *caps_to_str(uint32_t idx)
	16	{
40fc8c2c	17	#define RDMA_PORT_FLAGS_LOW(x) \
d090fbf3	18	x(RESERVED, 0) \
da990ab4 LR	19	x(SM, 1) \
	20	x(NOTICE, 2) \
	21	x(TRAP, 3) \
	22	x(OPT_IPD, 4) \
	23	x(AUTO_MIGR, 5) \
	24	x(SL_MAP, 6) \
	25	x(MKEY_NVRAM, 7) \
	26	x(PKEY_NVRAM, 8) \
	27	x(LED_INFO, 9) \
	28	x(SM_DISABLED, 10) \
4e2eb9fd	29	x(SYS_IMAGE_GUID, 11) \
da990ab4	30	x(PKEY_SW_EXT_PORT_TRAP, 12) \
d090fbf3	31	x(CABLE_INFO, 13) \
da990ab4	32	x(EXTENDED_SPEEDS, 14) \
d090fbf3	33	x(CAP_MASK2, 15) \
da990ab4 LR	34	x(CM, 16) \
	35	x(SNMP_TUNNEL, 17) \
	36	x(REINIT, 18) \
	37	x(DEVICE_MGMT, 19) \
	38	x(VENDOR_CLASS, 20) \
	39	x(DR_NOTICE, 21) \
	40	x(CAP_MASK_NOTICE, 22) \
	41	x(BOOT_MGMT, 23) \
	42	x(LINK_LATENCY, 24) \
8f478ec2	43	x(CLIENT_REG, 25) \
d090fbf3 LR	44	x(OTHER_LOCAL_CHANGES, 26) \
	45	x(LINK_SPPED_WIDTH, 27) \
	46	x(VENDOR_SPECIFIC_MADS, 28) \
	47	x(MULT_PKER_TRAP, 29) \
	48	x(MULT_FDB, 30) \
	49	x(HIERARCHY_INFO, 31)
da990ab4	50
40fc8c2c MG	51	#define RDMA_PORT_FLAGS_HIGH(x) \
	52	x(SET_NODE_DESC, 0) \
	53	x(EXT_INFO, 1) \
	54	x(VIRT, 2) \
	55	x(SWITCH_POR_STATE_TABLE, 3) \
	56	x(LINK_WIDTH_2X, 4) \
	57	x(LINK_SPEED_HDR, 5)
da990ab4	58
40fc8c2c MG	59	/*
	60	* Separation below is needed to allow compilation of rdmatool
	61	* on 32bits systems. On such systems, C-enum is limited to be
	62	* int and can't hold more than 32 bits.
	63	*/
	64	enum { RDMA_PORT_FLAGS_LOW(RDMA_BITMAP_ENUM) };
	65	enum { RDMA_PORT_FLAGS_HIGH(RDMA_BITMAP_ENUM) };
	66
	67	static const char * const
	68	rdma_port_names_low[] = { RDMA_PORT_FLAGS_LOW(RDMA_BITMAP_NAMES) };
da990ab4	69	static const char * const
40fc8c2c MG	70	rdma_port_names_high[] = { RDMA_PORT_FLAGS_HIGH(RDMA_BITMAP_NAMES) };
	71	uint32_t high_idx;
	72	#undef RDMA_PORT_FLAGS_LOW
	73	#undef RDMA_PORT_FLAGS_HIGH
	74
	75	if (idx < ARRAY_SIZE(rdma_port_names_low) && rdma_port_names_low[idx])
	76	return rdma_port_names_low[idx];
	77
	78	high_idx = idx - ARRAY_SIZE(rdma_port_names_low);
	79	if (high_idx < ARRAY_SIZE(rdma_port_names_high) &&
	80	rdma_port_names_high[high_idx])
	81	return rdma_port_names_high[high_idx];
da990ab4	82
40fc8c2c	83	return "UNKNOWN";
da990ab4 LR	84	}
da990ab4 LR	85
7fc75744	86	static void link_print_caps(struct rd rd, struct nlattr *tb)
da990ab4 LR	87	{
	88	uint64_t caps;
	89	uint32_t idx;
	90
	91	if (!tb[RDMA_NLDEV_ATTR_CAP_FLAGS])
	92	return;
	93
	94	caps = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_CAP_FLAGS]);
	95
7fc75744 LR	96	if (rd->json_output) {
	97	jsonw_name(rd->jw, "caps");
	98	jsonw_start_array(rd->jw);
	99	} else {
	100	pr_out("\n caps: <");
	101	}
da990ab4 LR	102	for (idx = 0; caps; idx++) {
da990ab4 LR	103	if (caps & 0x1) {
7fc75744 LR	104	if (rd->json_output) {
	105	jsonw_string(rd->jw, caps_to_str(idx));
	106	} else {
	107	pr_out("%s", caps_to_str(idx));
	108	if (caps >> 0x1)
	109	pr_out(", ");
	110	}
da990ab4 LR	111	}
	112	caps >>= 0x1;
	113	}
	114
7fc75744 LR	115	if (rd->json_output)
	116	jsonw_end_array(rd->jw);
	117	else
	118	pr_out(">");
da990ab4 LR	119	}
da990ab4 LR	120
7fc75744	121	static void link_print_subnet_prefix(struct rd rd, struct nlattr *tb)
da990ab4 LR	122	{
da990ab4 LR	123	uint64_t subnet_prefix;
7fc75744 LR	124	uint16_t vp[4];
7fc75744 LR	125	char str[32];
da990ab4 LR	126
	127	if (!tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX])
	128	return;
	129
	130	subnet_prefix = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX]);
7fc75744 LR	131	memcpy(vp, &subnet_prefix, sizeof(uint64_t));
	132	snprintf(str, 32, "%04x:%04x:%04x:%04x", vp[3], vp[2], vp[1], vp[0]);
	133	if (rd->json_output)
	134	jsonw_string_field(rd->jw, "subnet_prefix", str);
	135	else
	136	pr_out("subnet_prefix %s ", str);
da990ab4 LR	137	}
da990ab4 LR	138
7fc75744	139	static void link_print_lid(struct rd rd, struct nlattr *tb)
da990ab4	140	{
7fc75744 LR	141	uint32_t lid;
7fc75744 LR	142
da990ab4 LR	143	if (!tb[RDMA_NLDEV_ATTR_LID])
	144	return;
	145
7fc75744 LR	146	lid = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_LID]);
	147	if (rd->json_output)
	148	jsonw_uint_field(rd->jw, "lid", lid);
	149	else
	150	pr_out("lid %u ", lid);
da990ab4 LR	151	}
da990ab4 LR	152
7fc75744	153	static void link_print_sm_lid(struct rd rd, struct nlattr *tb)
da990ab4	154	{
7fc75744 LR	155	uint32_t sm_lid;
7fc75744 LR	156
da990ab4 LR	157	if (!tb[RDMA_NLDEV_ATTR_SM_LID])
	158	return;
	159
7fc75744 LR	160	sm_lid = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_SM_LID]);
	161	if (rd->json_output)
	162	jsonw_uint_field(rd->jw, "sm_lid", sm_lid);
	163	else
	164	pr_out("sm_lid %u ", sm_lid);
da990ab4 LR	165	}
da990ab4 LR	166
7fc75744	167	static void link_print_lmc(struct rd rd, struct nlattr *tb)
da990ab4	168	{
7fc75744 LR	169	uint8_t lmc;
7fc75744 LR	170
da990ab4 LR	171	if (!tb[RDMA_NLDEV_ATTR_LMC])
	172	return;
	173
7fc75744 LR	174	lmc = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_LMC]);
	175	if (rd->json_output)
	176	jsonw_uint_field(rd->jw, "lmc", lmc);
	177	else
	178	pr_out("lmc %u ", lmc);
da990ab4 LR	179	}
	180
	181	static const char *link_state_to_str(uint8_t link_state)
	182	{
	183	static const char * const link_state_str[] = { "NOP", "DOWN",
	184	"INIT", "ARMED",
	185	"ACTIVE",
	186	"ACTIVE_DEFER" };
	187	if (link_state < ARRAY_SIZE(link_state_str))
	188	return link_state_str[link_state];
	189	return "UNKNOWN";
	190	}
	191
7fc75744	192	static void link_print_state(struct rd rd, struct nlattr *tb)
da990ab4 LR	193	{
	194	uint8_t state;
	195
	196	if (!tb[RDMA_NLDEV_ATTR_PORT_STATE])
	197	return;
	198
	199	state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_STATE]);
7fc75744 LR	200	if (rd->json_output)
	201	jsonw_string_field(rd->jw, "state", link_state_to_str(state));
	202	else
	203	pr_out("state %s ", link_state_to_str(state));
da990ab4 LR	204	}
	205
	206	static const char *phys_state_to_str(uint8_t phys_state)
	207	{
	208	static const char * const phys_state_str[] = { "NOP", "SLEEP",
	209	"POLLING", "DISABLED",
	210	"ARMED", "LINK_UP",
	211	"LINK_ERROR_RECOVER",
	212	"PHY_TEST", "UNKNOWN",
	213	"OPA_OFFLINE",
	214	"UNKNOWN", "OPA_TEST" };
	215	if (phys_state < ARRAY_SIZE(phys_state_str))
	216	return phys_state_str[phys_state];
	217	return "UNKNOWN";
	218	};
	219
7fc75744	220	static void link_print_phys_state(struct rd rd, struct nlattr *tb)
da990ab4 LR	221	{
	222	uint8_t phys_state;
	223
	224	if (!tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE])
	225	return;
	226
	227	phys_state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE]);
7fc75744 LR	228	if (rd->json_output)
	229	jsonw_string_field(rd->jw, "physical_state",
	230	phys_state_to_str(phys_state));
	231	else
	232	pr_out("physical_state %s ", phys_state_to_str(phys_state));
da990ab4 LR	233	}
da990ab4 LR	234
15259427 LR	235	static void link_print_netdev(struct rd rd, struct nlattr *tb)
	236	{
	237	const char *netdev_name;
	238	uint32_t idx;
	239
	240	if (!tb[RDMA_NLDEV_ATTR_NDEV_NAME] \|\| !tb[RDMA_NLDEV_ATTR_NDEV_INDEX])
	241	return;
	242
	243	netdev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_NDEV_NAME]);
	244	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_NDEV_INDEX]);
	245	if (rd->json_output) {
	246	jsonw_string_field(rd->jw, "netdev", netdev_name);
	247	jsonw_uint_field(rd->jw, "netdev_index", idx);
	248	} else {
	249	pr_out("netdev %s ", netdev_name);
	250	if (rd->show_details)
	251	pr_out("netdev_index %u ", idx);
	252	}
	253	}
	254
da990ab4 LR	255	static int link_parse_cb(const struct nlmsghdr nlh, void data)
	256	{
	257	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
	258	struct rd *rd = data;
7fc75744 LR	259	uint32_t port, idx;
7fc75744 LR	260	char name[32];
da990ab4 LR	261
	262	mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
	263	if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] \|\| !tb[RDMA_NLDEV_ATTR_DEV_NAME])
	264	return MNL_CB_ERROR;
	265
	266	if (!tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
	267	pr_err("This tool doesn't support switches yet\n");
	268	return MNL_CB_ERROR;
	269	}
	270
7fc75744 LR	271	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
	272	port = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
	273	snprintf(name, 32, "%s/%u",
	274	mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]), port);
	275
	276	if (rd->json_output) {
	277	jsonw_uint_field(rd->jw, "ifindex", idx);
	278	jsonw_uint_field(rd->jw, "port", port);
	279	jsonw_string_field(rd->jw, "ifname", name);
	280
	281	} else {
	282	pr_out("%u/%u: %s: ", idx, port, name);
	283	}
	284
	285	link_print_subnet_prefix(rd, tb);
	286	link_print_lid(rd, tb);
	287	link_print_sm_lid(rd, tb);
	288	link_print_lmc(rd, tb);
	289	link_print_state(rd, tb);
	290	link_print_phys_state(rd, tb);
15259427	291	link_print_netdev(rd, tb);
da990ab4	292	if (rd->show_details)
7fc75744	293	link_print_caps(rd, tb);
da990ab4	294
7fc75744 LR	295	if (!rd->json_output)
7fc75744 LR	296	pr_out("\n");
da990ab4 LR	297	return MNL_CB_OK;
	298	}
	299
	300	static int link_no_args(struct rd *rd)
	301	{
	302	uint32_t seq;
	303	int ret;
	304
	305	rd_prepare_msg(rd, RDMA_NLDEV_CMD_PORT_GET, &seq,
	306	(NLM_F_REQUEST \| NLM_F_ACK));
	307	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
	308	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_PORT_INDEX, rd->port_idx);
	309	ret = rd_send_msg(rd);
	310	if (ret)
	311	return ret;
	312
7fc75744 LR	313	if (rd->json_output)
	314	jsonw_start_object(rd->jw);
	315	ret = rd_recv_msg(rd, link_parse_cb, rd, seq);
	316	if (rd->json_output)
	317	jsonw_end_object(rd->jw);
	318	return ret;
da990ab4 LR	319	}
	320
	321	static int link_one_show(struct rd *rd)
	322	{
	323	const struct rd_cmd cmds[] = {
	324	{ NULL, link_no_args},
	325	{ 0 }
	326	};
	327
e3dee3c8 LR	328	if (!rd->port_idx)
	329	return 0;
	330
da990ab4 LR	331	return rd_exec_cmd(rd, cmds, "parameter");
	332	}
	333
	334	static int link_show(struct rd *rd)
	335	{
6416d1a0	336	return rd_exec_link(rd, link_one_show, true);
da990ab4 LR	337	}
	338
	339	int cmd_link(struct rd *rd)
	340	{
	341	const struct rd_cmd cmds[] = {
	342	{ NULL, link_show },
	343	{ "show", link_show },
	344	{ "list", link_show },
	345	{ "help", link_help },
	346	{ 0 }
	347	};
	348
	349	return rd_exec_cmd(rd, cmds, "link command");
	350	}