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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* monitor.c RDMA tool
* Authors: Chiara Meiohas <cmeiohas@nvidia.com>
*/
#include "rdma.h"
#include "utils.h"
static int mon_is_supported_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
uint8_t *is_sup = data;
mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
if (tb[RDMA_NLDEV_SYS_ATTR_MONITOR_MODE])
*is_sup = mnl_attr_get_u8(tb[RDMA_NLDEV_SYS_ATTR_MONITOR_MODE]);
return MNL_CB_OK;
}
static int mon_is_supported(struct rd *rd, uint8_t *is_sup)
{
uint32_t seq;
int ret;
*is_sup = 0;
rd_prepare_msg(rd, RDMA_NLDEV_CMD_SYS_GET,
&seq, (NLM_F_REQUEST | NLM_F_ACK));
ret = rd_send_msg(rd);
if (ret)
return ret;
return rd_recv_msg(rd, mon_is_supported_cb, is_sup, seq);
}
static void mon_print_event_type(struct nlattr **tb)
{
const char *const event_types_str[] = {
[RDMA_REGISTER_EVENT] = "[REGISTER]",
[RDMA_UNREGISTER_EVENT] = "[UNREGISTER]",
[RDMA_NETDEV_ATTACH_EVENT] = "[NETDEV_ATTACH]",
[RDMA_NETDEV_DETACH_EVENT] = "[NETDEV_DETACH]",
[RDMA_RENAME_EVENT] = "[RENAME]",
[RDMA_NETDEV_RENAME_EVENT] = "[NETDEV_RENAME]",
};
enum rdma_nl_notify_event_type etype;
char unknown_type[32];
if (!tb[RDMA_NLDEV_ATTR_EVENT_TYPE])
return;
etype = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_EVENT_TYPE]);
if (etype < ARRAY_SIZE(event_types_str) && event_types_str[etype]) {
print_string(PRINT_ANY, "event_type", "%s\t",
event_types_str[etype]);
} else {
snprintf(unknown_type, sizeof(unknown_type), "[UNKNOWN 0x%02x]",
etype);
print_string(PRINT_ANY, "event_type", "%s\t", unknown_type);
}
}
static int mon_print_dev(struct nlattr **tb)
{
const char *name;
uint32_t idx;
if (tb[RDMA_NLDEV_ATTR_DEV_INDEX]) {
idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
print_uint(PRINT_ANY, "rdma_index", "dev %u", idx);
}
if(tb[RDMA_NLDEV_ATTR_DEV_NAME]) {
name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
print_string(PRINT_ANY, "rdma_dev", " %s", name);
}
return 0;
}
static void mon_print_port_idx(struct nlattr **tb)
{
uint32_t port;
if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
port = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
print_uint(PRINT_ANY, "port", " port %u", port);
}
}
static void mon_print_netdev(struct nlattr **tb)
{
uint32_t netdev_idx;
const char *name;
if (tb[RDMA_NLDEV_ATTR_NDEV_INDEX]) {
netdev_idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_NDEV_INDEX]);
print_uint(PRINT_ANY, "netdev_idx", " netdev %u", netdev_idx);
}
if(tb[RDMA_NLDEV_ATTR_NDEV_NAME]) {
name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_NDEV_NAME]);
print_string(PRINT_ANY, "netdev_name", " %s", name);
}
}
static int mon_show_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX + 1] = {};
mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
if (!tb[RDMA_NLDEV_ATTR_EVENT_TYPE])
return MNL_CB_ERROR;
open_json_object(NULL);
mon_print_event_type(tb);
mon_print_dev(tb);
mon_print_port_idx(tb);
mon_print_netdev(tb);
close_json_object();
newline();
fflush(stdout);
return MNL_CB_OK;
}
static int mon_show(struct rd* rd)
{
unsigned int groups = 0;
uint8_t is_sup = 0;
int one = 1;
char *buf;
int err;
err = mon_is_supported(rd, &is_sup);
if (err) {
pr_err("Failed to check if RDMA monitoring is supported\n");
return err;
}
if (!is_sup) {
pr_err("RDMA monitoring is not supported by the kernel\n");
return -ENOENT;
}
buf = malloc(MNL_SOCKET_BUFFER_SIZE);
if (!buf) {
pr_err("Buffer allocation failed\n");
return -ENOMEM;
}
rd->nl = mnl_socket_open(NETLINK_RDMA);
if (!rd->nl) {
pr_err("Failed to open NETLINK_RDMA socket. Error: %s\n",
strerror(errno));
err = -ENODEV;
goto err_free;
}
mnl_socket_setsockopt(rd->nl, NETLINK_CAP_ACK, &one, sizeof(one));
mnl_socket_setsockopt(rd->nl, NETLINK_EXT_ACK, &one, sizeof(one));
groups |= nl_mgrp(RDMA_NL_GROUP_NOTIFY);
err = mnl_add_nl_group(rd->nl, groups);
if (err < 0) {
pr_err("Failed to add NETLINK_RDMA multicast group. Error: %s\n",
strerror(errno));
goto err_close;
}
new_json_obj(json);
err = mnlu_socket_recv_run(rd->nl, 0, buf, MNL_SOCKET_BUFFER_SIZE,
mon_show_cb, rd);
if (err) {
pr_err("Failed to listen to rdma socket\n");
goto err_free_json;
}
return 0;
err_free_json:
delete_json_obj();
err_close:
mnl_socket_close(rd->nl);
err_free:
free(buf);
return err;
}
static int mon_help(struct rd *rd)
{
pr_out("Usage: rdma monitor [ -j ]\n");
return 0;
}
int cmd_mon(struct rd *rd)
{
const struct rd_cmd cmds[] = {
{ NULL, mon_show },
{ "help", mon_help },
{ 0 }
};
return rd_exec_cmd(rd, cmds, "mon command");
}
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