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RDMA/nldev: Add support to get status of all counters

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This patch adds the ability to get the name, index and status of all
counters for each link through RDMA netlink. This can be used for
user-space to get the current optional-counter mode.

Examples:
$ rdma statistic mode
link rocep8s0f0/1 optional-counters cc_rx_ce_pkts

$ rdma statistic mode supported
link rocep8s0f0/1 supported optional-counters cc_rx_ce_pkts,cc_rx_cnp_pkts,cc_tx_cnp_pkts
link rocep8s0f1/1 supported optional-counters cc_rx_ce_pkts,cc_rx_cnp_pkts,cc_tx_cnp_pkts

Link: https://lore.kernel.org/r/20211008122439.166063-8-markzhang@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Signed-off-by: Neta Ostrovsky <netao@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Aharon Landau 2021-10-08 15:24:33 +03:00 committed by Jason Gunthorpe
parent 5e2ddd1e59
commit 7301d0a983
2 changed files with 103 additions and 0 deletions
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98
drivers/infiniband/core/nldev.c
View File

@ -154,6 +154,8 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_NET_NS_FD] = { .type = NLA_U32 },
[RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 },
[RDMA_NLDEV_SYS_ATTR_COPY_ON_FORK] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_INDEX] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC] = { .type = NLA_U8 },
};
static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
@ -2264,6 +2266,99 @@ static int nldev_stat_get_dumpit(struct sk_buff *skb,
return ret;
}
static int nldev_stat_get_counter_status_doit(struct sk_buff *skb,
struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX], *table, *entry;
struct rdma_hw_stats *stats;
struct ib_device *device;
struct sk_buff *msg;
u32 devid, port;
int ret, i;
ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
nldev_policy, extack);
if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
!tb[RDMA_NLDEV_ATTR_PORT_INDEX])
return -EINVAL;
devid = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
device = ib_device_get_by_index(sock_net(skb->sk), devid);
if (!device)
return -EINVAL;
port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
if (!rdma_is_port_valid(device, port)) {
ret = -EINVAL;
goto err;
}
stats = ib_get_hw_stats_port(device, port);
if (!stats) {
ret = -EINVAL;
goto err;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto err;
}
nlh = nlmsg_put(
msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_STAT_GET_STATUS),
0, 0);
ret = -EMSGSIZE;
if (fill_nldev_handle(msg, device) ||
nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
goto err_msg;
table = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
if (!table)
goto err_msg;
mutex_lock(&stats->lock);
for (i = 0; i < stats->num_counters; i++) {
entry = nla_nest_start(msg,
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY);
if (!entry)
goto err_msg_table;
if (nla_put_string(msg,
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME,
stats->descs[i].name) ||
nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_INDEX, i))
goto err_msg_entry;
if ((stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) &&
(nla_put_u8(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC,
!test_bit(i, stats->is_disabled))))
goto err_msg_entry;
nla_nest_end(msg, entry);
}
mutex_unlock(&stats->lock);
nla_nest_end(msg, table);
nlmsg_end(msg, nlh);
ib_device_put(device);
return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
err_msg_entry:
nla_nest_cancel(msg, entry);
err_msg_table:
mutex_unlock(&stats->lock);
nla_nest_cancel(msg, table);
err_msg:
nlmsg_free(msg);
err:
ib_device_put(device);
return ret;
}
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,
@ -2353,6 +2448,9 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
.dump = nldev_res_get_mr_raw_dumpit,
.flags = RDMA_NL_ADMIN_PERM,
},
[RDMA_NLDEV_CMD_STAT_GET_STATUS] = {
.doit = nldev_stat_get_counter_status_doit,
},
};
void __init nldev_init(void)

5
include/uapi/rdma/rdma_netlink.h
View File

@ -297,6 +297,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_SRQ_GET, /* can dump */
RDMA_NLDEV_CMD_STAT_GET_STATUS,
RDMA_NLDEV_NUM_OPS
};
@ -549,6 +551,9 @@ enum rdma_nldev_attr {
RDMA_NLDEV_SYS_ATTR_COPY_ON_FORK, /* u8 */
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_INDEX, /* u32 */
RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC, /* u8 */
/*
* Always the end
*/