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Date: Fri, 29 May 2020 01:22:12 +0200 (CEST)
From: Michal Kubecek <mkubecek@...e.cz>
To: John Linville <linville@...driver.com>, netdev@...r.kernel.org
Cc: Andrew Lunn <andrew@...n.ch>,
Oleksij Rempel <o.rempel@...gutronix.de>
Subject: [PATCH ethtool 13/21] netlink: add netlink handler for gchannels (-l)
Implement "ethtool -l <dev>" subcommand using ETHTOOL_MSG_CHANNELS_GET
netlink message. This retrieves and displays device channel counts,
traditionally provided by ETHTOOL_GCHANNELS ioctl request.
Also register the callback with monitor code so that the monitor can
display ETHTOOL_MSG_CHANNELS_NTF notifications.
Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
Makefile.am | 1 +
ethtool.c | 1 +
netlink/channels.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++
netlink/extapi.h | 2 ++
netlink/monitor.c | 8 ++++++
netlink/netlink.h | 1 +
6 files changed, 84 insertions(+)
create mode 100644 netlink/channels.c
diff --git a/Makefile.am b/Makefile.am
index f7d7b44a438d..b5e32bec68f1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -32,6 +32,7 @@ ethtool_SOURCES += \
netlink/settings.c netlink/parser.c netlink/parser.h \
netlink/permaddr.c netlink/prettymsg.c netlink/prettymsg.h \
netlink/features.c netlink/privflags.c netlink/rings.c \
+ netlink/channels.c \
netlink/desc-ethtool.c netlink/desc-genlctrl.c \
netlink/desc-rtnl.c \
uapi/linux/ethtool_netlink.h \
diff --git a/ethtool.c b/ethtool.c
index bddde6d9f7c0..eff97f4dfe70 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -5365,6 +5365,7 @@ static const struct option args[] = {
{
.opts = "-l|--show-channels",
.func = do_gchannels,
+ .nlfunc = nl_gchannels,
.help = "Query Channels"
},
{
diff --git a/netlink/channels.c b/netlink/channels.c
new file mode 100644
index 000000000000..ddea17b4d670
--- /dev/null
+++ b/netlink/channels.c
@@ -0,0 +1,71 @@
+/*
+ * channels.c - netlink implementation of channel commands
+ *
+ * Implementation of "ethtool -l <dev>"
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "../internal.h"
+#include "../common.h"
+#include "netlink.h"
+
+/* CHANNELS_GET */
+
+int channels_reply_cb(const struct nlmsghdr *nlhdr, void *data)
+{
+ const struct nlattr *tb[ETHTOOL_A_CHANNELS_MAX + 1] = {};
+ DECLARE_ATTR_TB_INFO(tb);
+ struct nl_context *nlctx = data;
+ bool silent;
+ int err_ret;
+ int ret;
+
+ silent = nlctx->is_dump || nlctx->is_monitor;
+ err_ret = silent ? MNL_CB_OK : MNL_CB_ERROR;
+ ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info);
+ if (ret < 0)
+ return err_ret;
+ nlctx->devname = get_dev_name(tb[ETHTOOL_A_CHANNELS_HEADER]);
+ if (!dev_ok(nlctx))
+ return err_ret;
+
+ if (silent)
+ putchar('\n');
+ printf("Channel parameters for %s:\n", nlctx->devname);
+ printf("Pre-set maximums:\n");
+ show_u32(tb[ETHTOOL_A_CHANNELS_RX_MAX], "RX:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_TX_MAX], "TX:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_OTHER_MAX], "Other:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_COMBINED_MAX], "Combined:\t");
+ printf("Current hardware settings:\n");
+ show_u32(tb[ETHTOOL_A_CHANNELS_RX_COUNT], "RX:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_TX_COUNT], "TX:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_OTHER_COUNT], "Other:\t\t");
+ show_u32(tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT], "Combined:\t");
+
+ return MNL_CB_OK;
+}
+
+int nl_gchannels(struct cmd_context *ctx)
+{
+ struct nl_context *nlctx = ctx->nlctx;
+ struct nl_socket *nlsk = nlctx->ethnl_socket;
+ int ret;
+
+ if (netlink_cmd_check(ctx, ETHTOOL_MSG_CHANNELS_GET, true))
+ return -EOPNOTSUPP;
+ if (ctx->argc > 0) {
+ fprintf(stderr, "ethtool: unexpected parameter '%s'\n",
+ *ctx->argp);
+ return 1;
+ }
+
+ ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_CHANNELS_GET,
+ ETHTOOL_A_CHANNELS_HEADER, 0);
+ if (ret < 0)
+ return ret;
+ return nlsock_send_get_request(nlsk, channels_reply_cb);
+}
diff --git a/netlink/extapi.h b/netlink/extapi.h
index 8a3e72bc75e6..9438dcd3aa0f 100644
--- a/netlink/extapi.h
+++ b/netlink/extapi.h
@@ -26,6 +26,7 @@ int nl_gprivflags(struct cmd_context *ctx);
int nl_sprivflags(struct cmd_context *ctx);
int nl_gring(struct cmd_context *ctx);
int nl_sring(struct cmd_context *ctx);
+int nl_gchannels(struct cmd_context *ctx);
int nl_monitor(struct cmd_context *ctx);
void nl_monitor_usage(void);
@@ -56,6 +57,7 @@ static inline void nl_monitor_usage(void)
#define nl_sprivflags NULL
#define nl_gring NULL
#define nl_sring NULL
+#define nl_gchannels NULL
#endif /* ETHTOOL_ENABLE_NETLINK */
diff --git a/netlink/monitor.c b/netlink/monitor.c
index c89e6138dbec..5dada99168b0 100644
--- a/netlink/monitor.c
+++ b/netlink/monitor.c
@@ -43,6 +43,10 @@ static struct {
.cmd = ETHTOOL_MSG_RINGS_NTF,
.cb = rings_reply_cb,
},
+ {
+ .cmd = ETHTOOL_MSG_CHANNELS_NTF,
+ .cb = channels_reply_cb,
+ },
};
static void clear_filter(struct nl_context *nlctx)
@@ -126,6 +130,10 @@ static struct monitor_option monitor_opts[] = {
.pattern = "-g|--show-ring|-G|--set-ring",
.cmd = ETHTOOL_MSG_RINGS_NTF,
},
+ {
+ .pattern = "-l|--show-channels|-L|--set-channels",
+ .cmd = ETHTOOL_MSG_CHANNELS_NTF,
+ },
};
static bool pattern_match(const char *s, const char *pattern)
diff --git a/netlink/netlink.h b/netlink/netlink.h
index fe68e23cccb3..511bcb2f2098 100644
--- a/netlink/netlink.h
+++ b/netlink/netlink.h
@@ -65,6 +65,7 @@ int debug_reply_cb(const struct nlmsghdr *nlhdr, void *data);
int features_reply_cb(const struct nlmsghdr *nlhdr, void *data);
int privflags_reply_cb(const struct nlmsghdr *nlhdr, void *data);
int rings_reply_cb(const struct nlmsghdr *nlhdr, void *data);
+int channels_reply_cb(const struct nlmsghdr *nlhdr, void *data);
/* dump helpers */
--
2.26.2
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