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RDMA/nldev: Allow optional-counter status configuration through RDMA netlink 

Provide an option to allow users to enable/disable optional counters
through RDMA netlink. Limiting it to users with ADMIN capability only.

Examples:
1. Enable optional counters cc_rx_ce_pkts and cc_rx_cnp_pkts (and
   disable all others):
$ sudo rdma statistic set link rocep8s0f0/1 optional-counters \
    cc_rx_ce_pkts,cc_rx_cnp_pkts

2. Remove all optional counters:
$ sudo rdma statistic unset link rocep8s0f0/1 optional-counters

Link: https://lore.kernel.org/r/20211008122439.166063-10-markzhang@nvidia.com
Signed-off-by: Aharon Landau <aharonl@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 15:24:35 +03:00 committed by Jason Gunthorpe
parent 822cf785ac
commit 3c3c1f1416
1 changed files with 57 additions and 4 deletions
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61
drivers/infiniband/core/nldev.c
View File

@ -1945,6 +1945,50 @@ err_fill:
return ret;
}
static int nldev_stat_set_counter_dynamic_doit(struct nlattr *tb[],
struct ib_device *device,
u32 port)
{
struct rdma_hw_stats *stats;
int rem, i, index, ret = 0;
struct nlattr *entry_attr;
unsigned long *target;
stats = ib_get_hw_stats_port(device, port);
if (!stats)
return -EINVAL;
target = kcalloc(BITS_TO_LONGS(stats->num_counters),
sizeof(*stats->is_disabled), GFP_KERNEL);
if (!target)
return -ENOMEM;
nla_for_each_nested(entry_attr, tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS],
rem) {
index = nla_get_u32(entry_attr);
if ((index >= stats->num_counters) ||
!(stats->descs[index].flags & IB_STAT_FLAG_OPTIONAL)) {
ret = -EINVAL;
goto out;
}
set_bit(index, target);
}
for (i = 0; i < stats->num_counters; i++) {
if (!(stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL))
continue;
ret = rdma_counter_modify(device, port, i, test_bit(i, target));
if (ret)
goto out;
}
out:
kfree(target);
return ret;
}
static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
@ -1971,7 +2015,8 @@ static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
goto err_put_device;
}
if (!tb[RDMA_NLDEV_ATTR_STAT_MODE]) {
if (!tb[RDMA_NLDEV_ATTR_STAT_MODE] &&
!tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS]) {
ret = -EINVAL;
goto err_put_device;
}
@ -1991,9 +2036,17 @@ static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
goto err_free_msg;
}
ret = nldev_stat_set_mode_doit(msg, extack, tb, device, port);
if (ret)
goto err_free_msg;
if (tb[RDMA_NLDEV_ATTR_STAT_MODE]) {
ret = nldev_stat_set_mode_doit(msg, extack, tb, device, port);
if (ret)
goto err_free_msg;
}
if (tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS]) {
ret = nldev_stat_set_counter_dynamic_doit(tb, device, port);
if (ret)
goto err_free_msg;
}
nlmsg_end(msg, nlh);
ib_device_put(device);