From: Michal Kubecek <mkubecek@suse.cz>
To: David Miller <davem@davemloft.net>, netdev@vger.kernel.org
Cc: Jakub Kicinski <kuba@kernel.org>, Jiri Pirko <jiri@resnulli.us>,
Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
John Linville <linville@tuxdriver.com>,
Johannes Berg <johannes@sipsolutions.net>,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next 13/15] ethtool: provide channel counts with CHANNELS_GET request
Date: Wed, 11 Mar 2020 22:41:08 +0100 (CET) [thread overview]
Message-ID: <316d090cdc05a905d761b10e607e19a3060be878.1583962006.git.mkubecek@suse.cz> (raw)
In-Reply-To: <cover.1583962006.git.mkubecek@suse.cz>
Implement CHANNELS_GET request to get channel counts of a network device.
These are traditionally available via ETHTOOL_GCHANNELS ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.rst | 30 +++++-
include/uapi/linux/ethtool_netlink.h | 21 +++++
net/ethtool/Makefile | 3 +-
net/ethtool/channels.c | 99 ++++++++++++++++++++
net/ethtool/netlink.c | 8 ++
net/ethtool/netlink.h | 1 +
6 files changed, 160 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/channels.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 026a5fd4a08b..decbbddfd8be 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -195,6 +195,7 @@ Userspace to kernel:
``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
``ETHTOOL_MSG_RINGS_GET`` get ring sizes
``ETHTOOL_MSG_RINGS_SET`` set ring sizes
+ ``ETHTOOL_MSG_CHANNELS_GET`` get channel counts
===================================== ================================
Kernel to userspace:
@@ -217,6 +218,7 @@ Kernel to userspace:
``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
``ETHTOOL_MSG_RINGS_NTF`` ring sizes
+ ``ETHTOOL_MSG_CHANNELS_GET_REPLY`` channel counts
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -695,6 +697,32 @@ driver. Driver may impose additional constraints and may not suspport all
attributes.
+CHANNELS_GET
+============
+
+Gets channel counts like ``ETHTOOL_GCHANNELS`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_CHANNELS_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_CHANNELS_HEADER`` nested reply header
+ ``ETHTOOL_A_CHANNELS_RX_MAX`` u32 max receive channels
+ ``ETHTOOL_A_CHANNELS_TX_MAX`` u32 max transmit channels
+ ``ETHTOOL_A_CHANNELS_OTHER_MAX`` u32 max other channels
+ ``ETHTOOL_A_CHANNELS_COMBINED_MAX`` u32 max combined channels
+ ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count
+ ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count
+ ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count
+ ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count
+ ===================================== ====== ==========================
+
+
Request translation
===================
@@ -765,7 +793,7 @@ have their netlink replacement yet.
``ETHTOOL_SRXFHINDIR`` n/a
``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET``
- ``ETHTOOL_GCHANNELS`` n/a
+ ``ETHTOOL_GCHANNELS`` ``ETHTOOL_MSG_CHANNELS_GET``
``ETHTOOL_SCHANNELS`` n/a
``ETHTOOL_SET_DUMP`` n/a
``ETHTOOL_GET_DUMP_FLAG`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index abfc8fd626da..2270eb115eca 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -30,6 +30,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_SET,
ETHTOOL_MSG_RINGS_GET,
ETHTOOL_MSG_RINGS_SET,
+ ETHTOOL_MSG_CHANNELS_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -56,6 +57,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_NTF,
ETHTOOL_MSG_RINGS_GET_REPLY,
ETHTOOL_MSG_RINGS_NTF,
+ ETHTOOL_MSG_CHANNELS_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -287,6 +289,25 @@ enum {
ETHTOOL_A_RINGS_MAX = (__ETHTOOL_A_RINGS_CNT - 1)
};
+/* CHANNELS */
+
+enum {
+ ETHTOOL_A_CHANNELS_UNSPEC,
+ ETHTOOL_A_CHANNELS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_CHANNELS_RX_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_TX_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_OTHER_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_COMBINED_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_RX_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_TX_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_OTHER_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_COMBINED_COUNT, /* u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_CHANNELS_CNT,
+ ETHTOOL_A_CHANNELS_MAX = (__ETHTOOL_A_CHANNELS_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index b48b70ef4ed0..b0bd3decad02 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -5,4 +5,5 @@ obj-y += ioctl.o common.o
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
+ linkstate.o debug.o wol.o features.o privflags.o rings.o \
+ channels.o
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
new file mode 100644
index 000000000000..01e7d7d39721
--- /dev/null
+++ b/net/ethtool/channels.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct channels_req_info {
+ struct ethnl_req_info base;
+};
+
+struct channels_reply_data {
+ struct ethnl_reply_data base;
+ struct ethtool_channels channels;
+};
+
+#define CHANNELS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct channels_reply_data, base)
+
+static const struct nla_policy
+channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
+ [ETHTOOL_A_CHANNELS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_CHANNELS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_OTHER_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_COMBINED_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_RX_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_TX_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_OTHER_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_COMBINED_COUNT] = { .type = NLA_REJECT },
+};
+
+static int channels_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct channels_reply_data *data = CHANNELS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_channels)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+ dev->ethtool_ops->get_channels(dev, &data->channels);
+ ret = 0;
+ ethnl_ops_complete(dev);
+
+ return ret;
+}
+
+static int channels_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return 8 * nla_total_size(sizeof(u32))
+ + 0;
+}
+
+static int channels_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct channels_reply_data *data = CHANNELS_REPDATA(reply_base);
+ const struct ethtool_channels *channels = &data->channels;
+
+ if (nla_put_u32(skb, ETHTOOL_A_CHANNELS_RX_MAX,
+ channels->max_rx) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_TX_MAX,
+ channels->max_tx) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_OTHER_MAX,
+ channels->max_other) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_COMBINED_MAX,
+ channels->max_combined) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_RX_COUNT,
+ channels->rx_count) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_TX_COUNT,
+ channels->tx_count) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_OTHER_COUNT,
+ channels->other_count) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_COMBINED_COUNT,
+ channels->combined_count))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_channels_request_ops = {
+ .request_cmd = ETHTOOL_MSG_CHANNELS_GET,
+ .reply_cmd = ETHTOOL_MSG_CHANNELS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_CHANNELS_HEADER,
+ .max_attr = ETHTOOL_A_CHANNELS_MAX,
+ .req_info_size = sizeof(struct channels_req_info),
+ .reply_data_size = sizeof(struct channels_reply_data),
+ .request_policy = channels_get_policy,
+
+ .prepare_data = channels_prepare_data,
+ .reply_size = channels_reply_size,
+ .fill_reply = channels_fill_reply,
+};
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 653e009216cd..ac35513abeed 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -218,6 +218,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
[ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
[ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
+ [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -763,6 +764,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_rings,
},
+ {
+ .cmd = ETHTOOL_MSG_CHANNELS_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 b30426d01890..53bfe720ff1a 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -340,6 +340,7 @@ extern const struct ethnl_request_ops ethnl_wol_request_ops;
extern const struct ethnl_request_ops ethnl_features_request_ops;
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;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
--
2.25.1
next prev parent reply other threads:[~2020-03-11 21:41 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-11 21:40 [PATCH net-next 00/15] ethtool netlink interface, part 3 Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 01/15] ethtool: rename ethnl_parse_header() to ethnl_parse_header_dev_get() Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 02/15] ethtool: update mapping of features to legacy ioctl requests Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 03/15] ethtool: provide netdev features with FEATURES_GET request Michal Kubecek
2020-03-11 22:49 ` Jakub Kicinski
2020-03-12 9:19 ` Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 04/15] ethtool: add ethnl_parse_bitset() helper Michal Kubecek
2020-03-12 5:48 ` David Miller
2020-03-12 9:25 ` Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 05/15] ethtool: set netdev features with FEATURES_SET request Michal Kubecek
2020-03-11 22:56 ` Jakub Kicinski
2020-03-12 9:45 ` Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 06/15] ethtool: add FEATURES_NTF notification Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 07/15] ethtool: provide private flags with PRIVFLAGS_GET request Michal Kubecek
2020-03-11 23:03 ` Jakub Kicinski
2020-03-11 21:40 ` [PATCH net-next 08/15] ethtool: set device private flags with PRIVFLAGS_SET request Michal Kubecek
2020-03-11 23:07 ` Jakub Kicinski
2020-03-11 21:40 ` [PATCH net-next 09/15] ethtool: add PRIVFLAGS_NTF notification Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 10/15] ethtool: provide ring sizes with RINGS_GET request Michal Kubecek
2020-03-11 23:16 ` Jakub Kicinski
2020-03-12 12:29 ` Michal Kubecek
2020-03-11 21:40 ` [PATCH net-next 11/15] ethtool: set device ring sizes with RINGS_SET request Michal Kubecek
2020-03-11 23:22 ` Jakub Kicinski
2020-03-11 21:41 ` [PATCH net-next 12/15] ethtool: add RINGS_NTF notification Michal Kubecek
2020-03-11 21:41 ` Michal Kubecek [this message]
2020-03-11 23:24 ` [PATCH net-next 13/15] ethtool: provide channel counts with CHANNELS_GET request Jakub Kicinski
2020-03-11 21:41 ` [PATCH net-next 14/15] ethtool: set device channel counts with CHANNELS_SET request Michal Kubecek
2020-03-11 21:41 ` [PATCH net-next 15/15] ethtool: add CHANNELS_NTF notification Michal Kubecek
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