e4a1717b67
Implement RINGS_GET request to get ring sizes of a network device. These are traditionally available via ETHTOOL_GRINGPARAM ioctl request. Omit attributes for ring types which are not supported by driver or device (zero reported for maximum). v2: (all suggested by Jakub Kicinski) - minor cleanup in rings_prepare_data() - more descriptive rings_reply_size() - omit attributes with zero max size Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include "netlink.h"
|
|
#include "common.h"
|
|
|
|
struct rings_req_info {
|
|
struct ethnl_req_info base;
|
|
};
|
|
|
|
struct rings_reply_data {
|
|
struct ethnl_reply_data base;
|
|
struct ethtool_ringparam ringparam;
|
|
};
|
|
|
|
#define RINGS_REPDATA(__reply_base) \
|
|
container_of(__reply_base, struct rings_reply_data, base)
|
|
|
|
static const struct nla_policy
|
|
rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
|
|
[ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
|
|
[ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_RX] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_RINGS_TX] = { .type = NLA_REJECT },
|
|
};
|
|
|
|
static int rings_prepare_data(const struct ethnl_req_info *req_base,
|
|
struct ethnl_reply_data *reply_base,
|
|
struct genl_info *info)
|
|
{
|
|
struct rings_reply_data *data = RINGS_REPDATA(reply_base);
|
|
struct net_device *dev = reply_base->dev;
|
|
int ret;
|
|
|
|
if (!dev->ethtool_ops->get_ringparam)
|
|
return -EOPNOTSUPP;
|
|
ret = ethnl_ops_begin(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
dev->ethtool_ops->get_ringparam(dev, &data->ringparam);
|
|
ethnl_ops_complete(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rings_reply_size(const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_RX */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
|
|
nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
|
|
nla_total_size(sizeof(u32)); /* _RINGS_TX */
|
|
}
|
|
|
|
static int rings_fill_reply(struct sk_buff *skb,
|
|
const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
|
|
const struct ethtool_ringparam *ringparam = &data->ringparam;
|
|
|
|
if ((ringparam->rx_max_pending &&
|
|
(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
|
|
ringparam->rx_max_pending) ||
|
|
nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
|
|
ringparam->rx_pending))) ||
|
|
(ringparam->rx_mini_max_pending &&
|
|
(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
|
|
ringparam->rx_mini_max_pending) ||
|
|
nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
|
|
ringparam->rx_mini_pending))) ||
|
|
(ringparam->rx_jumbo_max_pending &&
|
|
(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
|
|
ringparam->rx_jumbo_max_pending) ||
|
|
nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
|
|
ringparam->rx_jumbo_pending))) ||
|
|
(ringparam->tx_max_pending &&
|
|
(nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
|
|
ringparam->tx_max_pending) ||
|
|
nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
|
|
ringparam->tx_pending))))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct ethnl_request_ops ethnl_rings_request_ops = {
|
|
.request_cmd = ETHTOOL_MSG_RINGS_GET,
|
|
.reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
|
|
.hdr_attr = ETHTOOL_A_RINGS_HEADER,
|
|
.max_attr = ETHTOOL_A_RINGS_MAX,
|
|
.req_info_size = sizeof(struct rings_req_info),
|
|
.reply_data_size = sizeof(struct rings_reply_data),
|
|
.request_policy = rings_get_policy,
|
|
|
|
.prepare_data = rings_prepare_data,
|
|
.reply_size = rings_reply_size,
|
|
.fill_reply = rings_fill_reply,
|
|
};
|