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authorMichal Kubecek <mkubecek@suse.cz>2020-03-28 02:01:23 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-30 08:32:36 +0300
commit7f59fb32b0960f1e19651379d8e130bd017054bf (patch)
tree18b5dadc2a2539e921b0a47a30498b9770973537 /net/ethtool
parent0cf3eac8c936ae75ac5d429627b05eae895bba9d (diff)
downloadlinux-7f59fb32b0960f1e19651379d8e130bd017054bf.tar.xz
ethtool: provide pause parameters with PAUSE_GET request
Implement PAUSE_GET request to get pause parameters of a network device. These are traditionally available via ETHTOOL_GPAUSEPARAM ioctl request. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethtool')
-rw-r--r--net/ethtool/Makefile2
-rw-r--r--net/ethtool/netlink.c8
-rw-r--r--net/ethtool/netlink.h1
-rw-r--r--net/ethtool/pause.c81
4 files changed, 91 insertions, 1 deletions
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 7f7f40e03d16..28589ad5fd8a 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -6,4 +6,4 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
- channels.o coalesce.o
+ channels.o coalesce.o pause.o
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 117971e695ca..ca1695de8c9d 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -228,6 +228,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_RINGS_GET] = &ethnl_rings_request_ops,
[ETHTOOL_MSG_CHANNELS_GET] = &ethnl_channels_request_ops,
[ETHTOOL_MSG_COALESCE_GET] = &ethnl_coalesce_request_ops,
+ [ETHTOOL_MSG_PAUSE_GET] = &ethnl_pause_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -801,6 +802,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_coalesce,
},
+ {
+ .cmd = ETHTOOL_MSG_PAUSE_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index c3fb4fe5a3b7..e14ac089bfb1 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -342,6 +342,7 @@ extern const struct ethnl_request_ops ethnl_privflags_request_ops;
extern const struct ethnl_request_ops ethnl_rings_request_ops;
extern const struct ethnl_request_ops ethnl_channels_request_ops;
extern const struct ethnl_request_ops ethnl_coalesce_request_ops;
+extern const struct ethnl_request_ops ethnl_pause_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
new file mode 100644
index 000000000000..9feafeb7bb1c
--- /dev/null
+++ b/net/ethtool/pause.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct pause_req_info {
+ struct ethnl_req_info base;
+};
+
+struct pause_reply_data {
+ struct ethnl_reply_data base;
+ struct ethtool_pauseparam pauseparam;
+};
+
+#define PAUSE_REPDATA(__reply_base) \
+ container_of(__reply_base, struct pause_reply_data, base)
+
+static const struct nla_policy
+pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
+ [ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PAUSE_RX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PAUSE_TX] = { .type = NLA_REJECT },
+};
+
+static int pause_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_pauseparam)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+ dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam);
+ ethnl_ops_complete(dev);
+
+ return 0;
+}
+
+static int pause_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */
+ nla_total_size(sizeof(u8)) + /* _PAUSE_RX */
+ nla_total_size(sizeof(u8)); /* _PAUSE_TX */
+}
+
+static int pause_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
+ const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
+
+ if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) ||
+ nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) ||
+ nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_pause_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PAUSE_GET,
+ .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_PAUSE_HEADER,
+ .max_attr = ETHTOOL_A_PAUSE_MAX,
+ .req_info_size = sizeof(struct pause_req_info),
+ .reply_data_size = sizeof(struct pause_reply_data),
+ .request_policy = pause_get_policy,
+
+ .prepare_data = pause_prepare_data,
+ .reply_size = pause_reply_size,
+ .fill_reply = pause_fill_reply,
+};