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-rw-r--r--netlink/channels.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/netlink/channels.c b/netlink/channels.c
new file mode 100644
index 0000000..5cae227
--- /dev/null
+++ b/netlink/channels.c
@@ -0,0 +1,143 @@
+/*
+ * channels.c - netlink implementation of channel commands
+ *
+ * Implementation of "ethtool -l <dev>" and "ethtool -L <dev> ..."
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "../internal.h"
+#include "../common.h"
+#include "netlink.h"
+#include "parser.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("rx-max", "RX:\t\t", tb[ETHTOOL_A_CHANNELS_RX_MAX]);
+ show_u32("tx-max", "TX:\t\t", tb[ETHTOOL_A_CHANNELS_TX_MAX]);
+ show_u32("other-max", "Other:\t\t", tb[ETHTOOL_A_CHANNELS_OTHER_MAX]);
+ show_u32("combined-max", "Combined:\t",
+ tb[ETHTOOL_A_CHANNELS_COMBINED_MAX]);
+ printf("Current hardware settings:\n");
+ show_u32("rx", "RX:\t\t", tb[ETHTOOL_A_CHANNELS_RX_COUNT]);
+ show_u32("tx", "TX:\t\t", tb[ETHTOOL_A_CHANNELS_TX_COUNT]);
+ show_u32("other", "Other:\t\t", tb[ETHTOOL_A_CHANNELS_OTHER_COUNT]);
+ show_u32("combined", "Combined:\t",
+ tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT]);
+
+ 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);
+}
+
+/* CHANNELS_SET */
+
+static const struct param_parser schannels_params[] = {
+ {
+ .arg = "rx",
+ .type = ETHTOOL_A_CHANNELS_RX_COUNT,
+ .handler = nl_parse_direct_u32,
+ .min_argc = 1,
+ },
+ {
+ .arg = "tx",
+ .type = ETHTOOL_A_CHANNELS_TX_COUNT,
+ .handler = nl_parse_direct_u32,
+ .min_argc = 1,
+ },
+ {
+ .arg = "other",
+ .type = ETHTOOL_A_CHANNELS_OTHER_COUNT,
+ .handler = nl_parse_direct_u32,
+ .min_argc = 1,
+ },
+ {
+ .arg = "combined",
+ .type = ETHTOOL_A_CHANNELS_COMBINED_COUNT,
+ .handler = nl_parse_direct_u32,
+ .min_argc = 1,
+ },
+ {}
+};
+
+int nl_schannels(struct cmd_context *ctx)
+{
+ struct nl_context *nlctx = ctx->nlctx;
+ struct nl_msg_buff *msgbuff;
+ struct nl_socket *nlsk;
+ int ret;
+
+ if (netlink_cmd_check(ctx, ETHTOOL_MSG_CHANNELS_SET, false))
+ return -EOPNOTSUPP;
+
+ nlctx->cmd = "-L";
+ nlctx->argp = ctx->argp;
+ nlctx->argc = ctx->argc;
+ nlctx->devname = ctx->devname;
+ nlsk = nlctx->ethnl_socket;
+ msgbuff = &nlsk->msgbuff;
+
+ ret = msg_init(nlctx, msgbuff, ETHTOOL_MSG_CHANNELS_SET,
+ NLM_F_REQUEST | NLM_F_ACK);
+ if (ret < 0)
+ return 2;
+ if (ethnla_fill_header(msgbuff, ETHTOOL_A_CHANNELS_HEADER,
+ ctx->devname, 0))
+ return -EMSGSIZE;
+
+ ret = nl_parser(nlctx, schannels_params, NULL, PARSER_GROUP_NONE, NULL);
+ if (ret < 0)
+ return 1;
+
+ ret = nlsock_sendmsg(nlsk, NULL);
+ if (ret < 0)
+ return 1;
+ ret = nlsock_process_reply(nlsk, nomsg_reply_cb, nlctx);
+ if (ret == 0)
+ return 0;
+ else
+ return nlctx->exit_code ?: 1;
+}