Adding upstream version 6.8.0.upstream/6.8.0

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

1 files changed, 958 insertions, 0 deletions

diff --git a/rdma/utils.c b/rdma/utils.c
new file mode 100644
index 0000000..27595a3
--- /dev/null
+++ b/rdma/utils.c
@@ -0,0 +1,958 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * utils.c	RDMA tool
+ * Authors:     Leon Romanovsky <leonro@mellanox.com>
+ */
+
+#include "rdma.h"
+#include <ctype.h>
+#include <inttypes.h>
+
+int rd_argc(struct rd *rd)
+{
+	return rd->argc;
+}
+
+char *rd_argv(struct rd *rd)
+{
+	if (!rd_argc(rd))
+		return NULL;
+	return *rd->argv;
+}
+
+int strcmpx(const char *str1, const char *str2)
+{
+	if (strlen(str1) > strlen(str2))
+		return -1;
+	return strncmp(str1, str2, strlen(str1));
+}
+
+static bool rd_argv_match(struct rd *rd, const char *pattern)
+{
+	if (!rd_argc(rd))
+		return false;
+	return strcmpx(rd_argv(rd), pattern) == 0;
+}
+
+void rd_arg_inc(struct rd *rd)
+{
+	if (!rd_argc(rd))
+		return;
+	rd->argc--;
+	rd->argv++;
+}
+
+bool rd_no_arg(struct rd *rd)
+{
+	return rd_argc(rd) == 0;
+}
+
+bool rd_is_multiarg(struct rd *rd)
+{
+	if (!rd_argc(rd))
+		return false;
+	return strpbrk(rd_argv(rd), ",-") != NULL;
+}
+
+/*
+ * Possible input:output
+ * dev/port    | first port | is_dump_all
+ * mlx5_1      | 0          | true
+ * mlx5_1/     | 0          | true
+ * mlx5_1/0    | 0          | false
+ * mlx5_1/1    | 1          | false
+ * mlx5_1/-    | 0          | false
+ *
+ * In strict port mode, a non-0 port must be provided
+ */
+static int get_port_from_argv(struct rd *rd, uint32_t *port,
+			      bool *is_dump_all, bool strict_port)
+{
+	char *slash;
+
+	*port = 0;
+	*is_dump_all = strict_port ? false : true;
+
+	slash = strchr(rd_argv(rd), '/');
+	/* if no port found, return 0 */
+	if (slash == NULL) {
+		if (strict_port)
+			return -EINVAL;
+		else
+			return 0;
+	}
+
+	if (slash++) {
+		if (*slash == '-') {
+			if (strict_port)
+				return -EINVAL;
+			*is_dump_all = false;
+			return 0;
+		}
+
+		if (isdigit(*slash)) {
+			*is_dump_all = false;
+			*port = atoi(slash);
+		}
+		if (!*port && strlen(slash))
+			return -EINVAL;
+	}
+	if (strict_port && (*port == 0))
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct dev_map *dev_map_alloc(const char *dev_name)
+{
+	struct dev_map *dev_map;
+
+	dev_map = calloc(1, sizeof(*dev_map));
+	if (!dev_map)
+		return NULL;
+	dev_map->dev_name = strdup(dev_name);
+	if (!dev_map->dev_name) {
+		free(dev_map);
+		return NULL;
+	}
+
+	return dev_map;
+}
+
+static void dev_map_cleanup(struct rd *rd)
+{
+	struct dev_map *dev_map, *tmp;
+
+	list_for_each_entry_safe(dev_map, tmp,
+				 &rd->dev_map_list, list) {
+		list_del(&dev_map->list);
+		free(dev_map->dev_name);
+		free(dev_map);
+	}
+}
+
+static int add_filter(struct rd *rd, char *key, char *value,
+		      const struct filters valid_filters[])
+{
+	char cset[] = "1234567890,-";
+	struct filter_entry *fe;
+	bool key_found = false;
+	int idx = 0;
+	char *endp;
+	int ret;
+
+	fe = calloc(1, sizeof(*fe));
+	if (!fe)
+		return -ENOMEM;
+
+	while (idx < MAX_NUMBER_OF_FILTERS && valid_filters[idx].name) {
+		if (!strcmpx(key, valid_filters[idx].name)) {
+			key_found = true;
+			break;
+		}
+		idx++;
+	}
+	if (!key_found) {
+		pr_err("Unsupported filter option: %s\n", key);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Check the filter validity, not optimal, but works
+	 *
+	 * Actually, there are three types of filters
+	 *  numeric - for example PID or QPN
+	 *  string  - for example states
+	 *  link    - user requested to filter on specific link
+	 *            e.g. mlx5_1/1, mlx5_1/-, mlx5_1 ...
+	 */
+	if (valid_filters[idx].is_number &&
+	    strspn(value, cset) != strlen(value)) {
+		pr_err("%s filter accepts \"%s\" characters only\n", key, cset);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	fe->key = strdup(key);
+	fe->value = strdup(value);
+	if (!fe->key || !fe->value) {
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+
+	errno = 0;
+	strtol(fe->value, &endp, 10);
+	if (valid_filters[idx].is_doit && !errno && *endp == '\0')
+		fe->is_doit = true;
+
+	for (idx = 0; idx < strlen(fe->value); idx++)
+		fe->value[idx] = tolower(fe->value[idx]);
+
+	list_add_tail(&fe->list, &rd->filter_list);
+	return 0;
+
+err_alloc:
+	free(fe->value);
+	free(fe->key);
+err:
+	free(fe);
+	return ret;
+}
+
+bool rd_doit_index(struct rd *rd, uint32_t *idx)
+{
+	struct filter_entry *fe;
+
+	list_for_each_entry(fe, &rd->filter_list, list) {
+		if (fe->is_doit) {
+			*idx = atoi(fe->value);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+int rd_build_filter(struct rd *rd, const struct filters valid_filters[])
+{
+	int ret = 0;
+	int idx = 0;
+
+	if (!valid_filters || !rd_argc(rd))
+		goto out;
+
+	if (rd_argc(rd) == 1) {
+		pr_err("No filter data was supplied to filter option %s\n", rd_argv(rd));
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (rd_argc(rd) % 2) {
+		pr_err("There is filter option without data\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	while (idx != rd_argc(rd)) {
+		/*
+		 * We can do micro-optimization and skip "dev"
+		 * and "link" filters, but it is not worth of it.
+		 */
+		ret = add_filter(rd, *(rd->argv + idx),
+				 *(rd->argv + idx + 1), valid_filters);
+		if (ret)
+			goto out;
+		idx += 2;
+	}
+
+out:
+	return ret;
+}
+
+static bool rd_check_is_key_exist(struct rd *rd, const char *key)
+{
+	struct filter_entry *fe;
+
+	list_for_each_entry(fe, &rd->filter_list, list) {
+		if (!strcmpx(fe->key, key))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * Check if string entry is filtered:
+ *  * key doesn't exist -> user didn't request -> not filtered
+ */
+static bool rd_check_is_string_filtered(struct rd *rd, const char *key,
+					const char *val)
+{
+	bool key_is_filtered = false;
+	struct filter_entry *fe;
+	char *p = NULL;
+	char *str;
+
+	list_for_each_entry(fe, &rd->filter_list, list) {
+		if (!strcmpx(fe->key, key)) {
+			/* We found the key */
+			p = strdup(fe->value);
+			key_is_filtered = true;
+			if (!p) {
+				/*
+				 * Something extremely wrong if we fail
+				 * to allocate small amount of bytes.
+				 */
+				pr_err("Found key, but failed to allocate memory to store value\n");
+				return key_is_filtered;
+			}
+
+			/*
+			 * Need to check if value in range
+			 * It can come in the following formats
+			 * and their permutations:
+			 * str
+			 * str1,str2
+			 */
+			str = strtok(p, ",");
+			while (str) {
+				if (strlen(str) == strlen(val) &&
+				    !strcasecmp(str, val)) {
+					key_is_filtered = false;
+					goto out;
+				}
+				str = strtok(NULL, ",");
+			}
+			goto out;
+		}
+	}
+
+out:
+	free(p);
+	return key_is_filtered;
+}
+
+/*
+ * Check if key is filtered:
+ * key doesn't exist -> user didn't request -> not filtered
+ */
+static bool rd_check_is_filtered(struct rd *rd, const char *key, uint32_t val)
+{
+	bool key_is_filtered = false;
+	struct filter_entry *fe;
+
+	list_for_each_entry(fe, &rd->filter_list, list) {
+		uint32_t left_val = 0, fe_value = 0;
+		bool range_check = false;
+		char *p = fe->value;
+
+		if (!strcmpx(fe->key, key)) {
+			/* We found the key */
+			key_is_filtered = true;
+			/*
+			 * Need to check if value in range
+			 * It can come in the following formats
+			 * (and their permutations):
+			 * numb
+			 * numb1,numb2
+			 * ,numb1,numb2
+			 * numb1-numb2
+			 * numb1,numb2-numb3,numb4-numb5
+			 */
+			while (*p) {
+				if (isdigit(*p)) {
+					fe_value = strtol(p, &p, 10);
+					if (fe_value == val ||
+					    (range_check && left_val < val &&
+					     val < fe_value)) {
+						key_is_filtered = false;
+						goto out;
+					}
+					range_check = false;
+				} else {
+					if (*p == '-') {
+						left_val = fe_value;
+						range_check = true;
+					}
+					p++;
+				}
+			}
+			goto out;
+		}
+	}
+
+out:
+	return key_is_filtered;
+}
+
+bool rd_is_filtered_attr(struct rd *rd, const char *key, uint32_t val,
+			 struct nlattr *attr)
+{
+	if (!attr)
+		return rd_check_is_key_exist(rd, key);
+
+	return rd_check_is_filtered(rd, key, val);
+}
+
+bool rd_is_string_filtered_attr(struct rd *rd, const char *key, const char *val,
+				struct nlattr *attr)
+{
+	if (!attr)
+		rd_check_is_key_exist(rd, key);
+
+	return rd_check_is_string_filtered(rd, key, val);
+}
+
+static void filters_cleanup(struct rd *rd)
+{
+	struct filter_entry *fe, *tmp;
+
+	list_for_each_entry_safe(fe, tmp,
+				 &rd->filter_list, list) {
+		list_del(&fe->list);
+		free(fe->key);
+		free(fe->value);
+		free(fe);
+	}
+}
+
+static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
+	[RDMA_NLDEV_ATTR_DEV_INDEX] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_DEV_NAME] = MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_PORT_INDEX] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_CAP_FLAGS] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_FW_VERSION] = MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_NODE_GUID] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_LID] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_SM_LID] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_LMC] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_PORT_STATE] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_SUMMARY]	= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY]	= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME] = MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_RES_QP]		= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_QP_ENTRY]		= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_LQPN]	= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_RQPN]	= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_RQ_PSN]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_SQ_PSN]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE]	= MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_TYPE]		= MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_STATE]		= MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_PID]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_KERN_NAME]	= MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_RES_CM_ID]		= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY]	= MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_PS]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_SRC_ADDR]		= MNL_TYPE_UNSPEC,
+	[RDMA_NLDEV_ATTR_RES_DST_ADDR]		= MNL_TYPE_UNSPEC,
+	[RDMA_NLDEV_ATTR_RES_CQ] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_CQE] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_USECNT] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_RES_POLL_CTX] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_MR] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_MR_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_RKEY] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_LKEY] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_IOVA] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_RES_MRLEN] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_RES_CTX] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_CTX_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_CTXN] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_RES_SRQ] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_SRQ_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_RES_SRQN] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_MIN_RANGE] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_MAX_RANGE] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_NDEV_INDEX]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_NDEV_NAME]		= MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_DRIVER] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_DRIVER_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_DRIVER_STRING] = MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_DRIVER_S32] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_DRIVER_U32] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_DRIVER_S64] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_DRIVER_U64] = MNL_TYPE_U64,
+	[RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_STAT_COUNTER] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_STAT_COUNTER_ID] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY] = MNL_TYPE_NESTED,
+	[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME] = MNL_TYPE_NUL_STRING,
+	[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_STAT_MODE] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_STAT_RES] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK] = MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_DEV_DIM] = MNL_TYPE_U8,
+	[RDMA_NLDEV_ATTR_RES_RAW] = MNL_TYPE_BINARY,
+	[RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE] = MNL_TYPE_U8,
+};
+
+static int rd_attr_check(const struct nlattr *attr, int *typep)
+{
+	int type;
+
+	if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX) < 0)
+		return MNL_CB_ERROR;
+
+	type = mnl_attr_get_type(attr);
+
+	if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
+		return MNL_CB_ERROR;
+
+	*typep = nldev_policy[type];
+	return MNL_CB_OK;
+}
+
+int rd_attr_cb(const struct nlattr *attr, void *data)
+{
+	const struct nlattr **tb = data;
+	int type;
+
+	if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX - 1) < 0)
+		/* We received unknown attribute */
+		return MNL_CB_OK;
+
+	type = mnl_attr_get_type(attr);
+
+	if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
+		return MNL_CB_ERROR;
+
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+int rd_dev_init_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
+	struct dev_map *dev_map;
+	struct rd *rd = data;
+	const char *dev_name;
+
+	mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
+	if (!tb[RDMA_NLDEV_ATTR_DEV_NAME] || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
+		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;
+	}
+
+	dev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
+
+	dev_map = dev_map_alloc(dev_name);
+	if (!dev_map)
+		/* The main function will cleanup the allocations */
+		return MNL_CB_ERROR;
+	list_add_tail(&dev_map->list, &rd->dev_map_list);
+
+	dev_map->num_ports = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
+	dev_map->idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
+	return MNL_CB_OK;
+}
+
+void rd_free(struct rd *rd)
+{
+	if (!rd)
+		return;
+	free(rd->buff);
+	dev_map_cleanup(rd);
+	filters_cleanup(rd);
+}
+
+int rd_set_arg_to_devname(struct rd *rd)
+{
+	int ret = 0;
+
+	while (!rd_no_arg(rd)) {
+		if (rd_argv_match(rd, "dev") || rd_argv_match(rd, "link")) {
+			rd_arg_inc(rd);
+			if (rd_no_arg(rd)) {
+				pr_err("No device name was supplied\n");
+				ret = -EINVAL;
+			}
+			goto out;
+		}
+		rd_arg_inc(rd);
+	}
+out:
+	return ret;
+}
+
+int rd_exec_link(struct rd *rd, int (*cb)(struct rd *rd), bool strict_port)
+{
+	struct dev_map *dev_map;
+	uint32_t port;
+	int ret = 0;
+
+	new_json_obj(json);
+	if (rd_no_arg(rd)) {
+		list_for_each_entry(dev_map, &rd->dev_map_list, list) {
+			rd->dev_idx = dev_map->idx;
+			port = (strict_port) ? 1 : 0;
+			for (; port < dev_map->num_ports + 1; port++) {
+				rd->port_idx = port;
+				ret = cb(rd);
+				if (ret)
+					goto out;
+			}
+		}
+
+	} else {
+		bool is_dump_all;
+
+		dev_map = dev_map_lookup(rd, true);
+		ret = get_port_from_argv(rd, &port, &is_dump_all, strict_port);
+		if (!dev_map || port > dev_map->num_ports || (!port && ret)) {
+			pr_err("Wrong device name\n");
+			ret = -ENOENT;
+			goto out;
+		}
+		rd_arg_inc(rd);
+		rd->dev_idx = dev_map->idx;
+		rd->port_idx = port;
+		for (; rd->port_idx < dev_map->num_ports + 1; rd->port_idx++) {
+			ret = cb(rd);
+			if (ret)
+				goto out;
+			if (!is_dump_all)
+				/*
+				 * We got request to show link for devname
+				 * with port index.
+				 */
+				break;
+		}
+	}
+
+out:
+	delete_json_obj();
+	return ret;
+}
+
+int rd_exec_dev(struct rd *rd, int (*cb)(struct rd *rd))
+{
+	struct dev_map *dev_map;
+	int ret = 0;
+
+	new_json_obj(json);
+	if (rd_no_arg(rd)) {
+		list_for_each_entry(dev_map, &rd->dev_map_list, list) {
+			rd->dev_idx = dev_map->idx;
+			ret = cb(rd);
+			if (ret)
+				goto out;
+		}
+	} else {
+		dev_map = dev_map_lookup(rd, false);
+		if (!dev_map) {
+			pr_err("Wrong device name - %s\n", rd_argv(rd));
+			ret = -ENOENT;
+			goto out;
+		}
+		rd_arg_inc(rd);
+		rd->dev_idx = dev_map->idx;
+		ret = cb(rd);
+	}
+out:
+	delete_json_obj();
+
+	return ret;
+}
+
+int rd_exec_require_dev(struct rd *rd, int (*cb)(struct rd *rd))
+{
+	if (rd_no_arg(rd)) {
+		pr_err("Please provide device name.\n");
+		return -EINVAL;
+	}
+
+	return rd_exec_dev(rd, cb);
+}
+
+int rd_exec_cmd(struct rd *rd, const struct rd_cmd *cmds, const char *str)
+{
+	const struct rd_cmd *c;
+
+	/* First argument in objs table is default variant */
+	if (rd_no_arg(rd))
+		return cmds->func(rd);
+
+	for (c = cmds + 1; c->cmd; ++c) {
+		if (rd_argv_match(rd, c->cmd)) {
+			/* Move to next argument */
+			rd_arg_inc(rd);
+			return c->func(rd);
+		}
+	}
+
+	pr_err("Unknown %s '%s'.\n", str, rd_argv(rd));
+	return 0;
+}
+
+void rd_prepare_msg(struct rd *rd, uint32_t cmd, uint32_t *seq, uint16_t flags)
+{
+	*seq = time(NULL);
+
+	rd->nlh = mnl_nlmsg_put_header(rd->buff);
+	rd->nlh->nlmsg_type = RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, cmd);
+	rd->nlh->nlmsg_seq = *seq;
+	rd->nlh->nlmsg_flags = flags;
+}
+
+int rd_send_msg(struct rd *rd)
+{
+	int ret;
+
+	rd->nl = mnlu_socket_open(NETLINK_RDMA);
+	if (!rd->nl) {
+		pr_err("Failed to open NETLINK_RDMA socket\n");
+		return -ENODEV;
+	}
+
+	ret = mnl_socket_sendto(rd->nl, rd->nlh, rd->nlh->nlmsg_len);
+	if (ret < 0) {
+		pr_err("Failed to send to socket with err %d\n", ret);
+		goto err;
+	}
+	return 0;
+
+err:
+	mnl_socket_close(rd->nl);
+	return ret;
+}
+
+int rd_recv_msg(struct rd *rd, mnl_cb_t callback, void *data, unsigned int seq)
+{
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	int ret;
+
+	ret = mnlu_socket_recv_run(rd->nl, seq, buf, MNL_SOCKET_BUFFER_SIZE,
+				   callback, data);
+	if (ret < 0 && !rd->suppress_errors)
+		perror("error");
+	return ret;
+}
+
+static int null_cb(const struct nlmsghdr *nlh, void *data)
+{
+	return MNL_CB_OK;
+}
+
+int rd_sendrecv_msg(struct rd *rd, unsigned int seq)
+{
+	int ret;
+
+	ret = rd_send_msg(rd);
+	if (!ret)
+		ret = rd_recv_msg(rd, null_cb, rd, seq);
+	return ret;
+}
+
+static struct dev_map *_dev_map_lookup(struct rd *rd, const char *dev_name)
+{
+	struct dev_map *dev_map;
+
+	list_for_each_entry(dev_map, &rd->dev_map_list, list)
+		if (strcmp(dev_name, dev_map->dev_name) == 0)
+			return dev_map;
+
+	return NULL;
+}
+
+struct dev_map *dev_map_lookup(struct rd *rd, bool allow_port_index)
+{
+	struct dev_map *dev_map;
+	char *dev_name;
+	char *slash;
+
+	if (rd_no_arg(rd))
+		return NULL;
+
+	dev_name = strdup(rd_argv(rd));
+	if (!dev_name)
+		return NULL;
+
+	if (allow_port_index) {
+		slash = strrchr(dev_name, '/');
+		if (slash)
+			*slash = '\0';
+	}
+
+	dev_map = _dev_map_lookup(rd, dev_name);
+	free(dev_name);
+	return dev_map;
+}
+
+#define nla_type(attr) ((attr)->nla_type & NLA_TYPE_MASK)
+
+/* End of device object always print a newline */
+void newline(void)
+{
+	putchar('\n');
+	fflush(stdout);
+}
+
+/* End of partial multi-line segment of a device object */
+void newline_indent(void)
+{
+	if (!is_json_context())
+		printf("%s    ", _SL_);
+}
+
+static int print_driver_string(const char *key_str, const char *val_str)
+{
+	print_string(PRINT_ANY, key_str, key_str, val_str);
+	print_string(PRINT_FP, NULL, " %s ", val_str);
+	return 0;
+}
+
+static int print_driver_s32(const char *key_str, int32_t val,
+			    enum rdma_nldev_print_type print_type)
+{
+	if (!is_json_context()) {
+		switch (print_type) {
+		case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
+			return pr_out("%s %d ", key_str, val);
+		case RDMA_NLDEV_PRINT_TYPE_HEX:
+			return pr_out("%s 0x%x ", key_str, val);
+		default:
+			return -EINVAL;
+		}
+	}
+	print_int(PRINT_JSON, key_str, NULL, val);
+	return 0;
+}
+
+static int print_driver_u32(const char *key_str, uint32_t val,
+			    enum rdma_nldev_print_type print_type)
+{
+	if (!is_json_context()) {
+		switch (print_type) {
+		case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
+			return pr_out("%s %u ", key_str, val);
+		case RDMA_NLDEV_PRINT_TYPE_HEX:
+			return pr_out("%s 0x%x ", key_str, val);
+		default:
+			return -EINVAL;
+		}
+	}
+	print_int(PRINT_JSON, key_str, NULL, val);
+	return 0;
+}
+
+static int print_driver_s64(const char *key_str, int64_t val,
+			    enum rdma_nldev_print_type print_type)
+{
+	if (!is_json_context()) {
+		switch (print_type) {
+		case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
+			return pr_out("%s %" PRId64 " ", key_str, val);
+		case RDMA_NLDEV_PRINT_TYPE_HEX:
+			return pr_out("%s 0x%" PRIx64 " ", key_str, val);
+		default:
+			return -EINVAL;
+		}
+	}
+	print_int(PRINT_JSON, key_str, NULL, val);
+	return 0;
+}
+
+static int print_driver_u64(const char *key_str, uint64_t val,
+			    enum rdma_nldev_print_type print_type)
+{
+	if (!is_json_context()) {
+		switch (print_type) {
+		case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
+			return pr_out("%s %" PRIu64 " ", key_str, val);
+		case RDMA_NLDEV_PRINT_TYPE_HEX:
+			return pr_out("%s 0x%" PRIx64 " ", key_str, val);
+		default:
+			return -EINVAL;
+		}
+	}
+	print_int(PRINT_JSON, key_str, NULL, val);
+	return 0;
+}
+
+static int print_driver_entry(struct nlattr *key_attr, struct nlattr *val_attr,
+			      enum rdma_nldev_print_type print_type)
+{
+	int attr_type = nla_type(val_attr);
+	int ret = -EINVAL;
+	char *key_str;
+
+	if (asprintf(&key_str, "drv_%s", mnl_attr_get_str(key_attr)) == -1)
+		return -ENOMEM;
+
+	switch (attr_type) {
+	case RDMA_NLDEV_ATTR_DRIVER_STRING:
+		ret = print_driver_string(key_str, mnl_attr_get_str(val_attr));
+		break;
+	case RDMA_NLDEV_ATTR_DRIVER_S32:
+		ret = print_driver_s32(key_str, mnl_attr_get_u32(val_attr), print_type);
+		break;
+	case RDMA_NLDEV_ATTR_DRIVER_U32:
+		ret = print_driver_u32(key_str, mnl_attr_get_u32(val_attr), print_type);
+		break;
+	case RDMA_NLDEV_ATTR_DRIVER_S64:
+		ret = print_driver_s64(key_str, mnl_attr_get_u64(val_attr), print_type);
+		break;
+	case RDMA_NLDEV_ATTR_DRIVER_U64:
+		ret = print_driver_u64(key_str, mnl_attr_get_u64(val_attr), print_type);
+		break;
+	}
+	free(key_str);
+	return ret;
+}
+
+void print_raw_data(struct rd *rd, struct nlattr **nla_line)
+{
+	uint8_t *data;
+	uint32_t len;
+	int i = 0;
+
+	if (!rd->show_raw)
+		return;
+
+	len = mnl_attr_get_payload_len(nla_line[RDMA_NLDEV_ATTR_RES_RAW]);
+	data = mnl_attr_get_payload(nla_line[RDMA_NLDEV_ATTR_RES_RAW]);
+	open_json_array(PRINT_JSON, "data");
+	while (i < len) {
+		print_uint(PRINT_ANY, NULL, "%d", data[i]);
+		i++;
+	}
+	close_json_array(PRINT_ANY, ">");
+}
+
+void print_driver_table(struct rd *rd, struct nlattr *tb)
+{
+	int print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
+	struct nlattr *tb_entry, *key = NULL, *val;
+	int type, cc = 0;
+	int ret;
+
+	if (!rd->show_driver_details || !tb)
+		return;
+
+	newline_indent();
+
+	/*
+	 * Driver attrs are tuples of {key, [print-type], value}.
+	 * The key must be a string.  If print-type is present, it
+	 * defines an alternate printf format type vs the native format
+	 * for the attribute.  And the value can be any available
+	 * driver type.
+	 */
+	mnl_attr_for_each_nested(tb_entry, tb) {
+
+		if (cc > MAX_LINE_LENGTH) {
+			newline_indent();
+			cc = 0;
+		}
+		if (rd_attr_check(tb_entry, &type) != MNL_CB_OK)
+			return;
+		if (!key) {
+			if (type != MNL_TYPE_NUL_STRING)
+				return;
+			key = tb_entry;
+		} else if (type == MNL_TYPE_U8) {
+			print_type = mnl_attr_get_u8(tb_entry);
+		} else {
+			val = tb_entry;
+			ret = print_driver_entry(key, val, print_type);
+			if (ret < 0)
+				return;
+			cc += ret;
+			print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
+			key = NULL;
+		}
+	}
+	return;
+}