diff options
Diffstat (limited to 'netlink/module.c')
| -rw-r--r-- | netlink/module.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/netlink/module.c b/netlink/module.c new file mode 100644 index 0000000..54aa6d0 --- /dev/null +++ b/netlink/module.c @@ -0,0 +1,179 @@ +/* + * module.c - netlink implementation of module commands + * + * Implementation of "ethtool --show-module <dev>" and + * "ethtool --set-module <dev> ..." + */ + +#include <errno.h> +#include <ctype.h> +#include <inttypes.h> +#include <string.h> +#include <stdio.h> + +#include "../internal.h" +#include "../common.h" +#include "netlink.h" +#include "parser.h" + +/* MODULE_GET */ + +static const char *module_power_mode_policy_name(u8 val) +{ + switch (val) { + case ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH: + return "high"; + case ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO: + return "auto"; + default: + return "unknown"; + } +} + +static const char *module_power_mode_name(u8 val) +{ + switch (val) { + case ETHTOOL_MODULE_POWER_MODE_LOW: + return "low"; + case ETHTOOL_MODULE_POWER_MODE_HIGH: + return "high"; + default: + return "unknown"; + } +} + +int module_reply_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_MODULE_MAX + 1] = {}; + struct nl_context *nlctx = data; + DECLARE_ATTR_TB_INFO(tb); + 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_MODULE_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + if (silent) + print_nl(); + + open_json_object(NULL); + + print_string(PRINT_ANY, "ifname", "Module parameters for %s:\n", + nlctx->devname); + + if (tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]) { + u8 val; + + val = mnl_attr_get_u8(tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]); + print_string(PRINT_ANY, "power-mode-policy", + "power-mode-policy: %s\n", + module_power_mode_policy_name(val)); + } + + if (tb[ETHTOOL_A_MODULE_POWER_MODE]) { + u8 val; + + val = mnl_attr_get_u8(tb[ETHTOOL_A_MODULE_POWER_MODE]); + print_string(PRINT_ANY, "power-mode", + "power-mode: %s\n", module_power_mode_name(val)); + } + + close_json_object(); + + return MNL_CB_OK; +} + +int nl_gmodule(struct cmd_context *ctx) +{ + struct nl_context *nlctx = ctx->nlctx; + struct nl_socket *nlsk; + int ret; + + if (netlink_cmd_check(ctx, ETHTOOL_MSG_MODULE_GET, true)) + return -EOPNOTSUPP; + if (ctx->argc > 0) { + fprintf(stderr, "ethtool: unexpected parameter '%s'\n", + *ctx->argp); + return 1; + } + + nlsk = nlctx->ethnl_socket; + ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_MODULE_GET, + ETHTOOL_A_MODULE_HEADER, 0); + if (ret < 0) + return ret; + + new_json_obj(ctx->json); + ret = nlsock_send_get_request(nlsk, module_reply_cb); + delete_json_obj(); + return ret; +} + +/* MODULE_SET */ + +static const struct lookup_entry_u8 power_mode_policy_values[] = { + { .arg = "high", .val = ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH }, + { .arg = "auto", .val = ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO }, + {} +}; + +static const struct param_parser smodule_params[] = { + { + .arg = "power-mode-policy", + .type = ETHTOOL_A_MODULE_POWER_MODE_POLICY, + .handler = nl_parse_lookup_u8, + .handler_data = power_mode_policy_values, + .min_argc = 1, + }, + {} +}; + +int nl_smodule(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_MODULE_SET, false)) + return -EOPNOTSUPP; + if (!ctx->argc) { + fprintf(stderr, "ethtool (--set-module): parameters missing\n"); + return 1; + } + + nlctx->cmd = "--set-module"; + 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_MODULE_SET, + NLM_F_REQUEST | NLM_F_ACK); + if (ret < 0) + return 2; + if (ethnla_fill_header(msgbuff, ETHTOOL_A_MODULE_HEADER, + ctx->devname, 0)) + return -EMSGSIZE; + + ret = nl_parser(nlctx, smodule_params, NULL, PARSER_GROUP_NONE, NULL); + if (ret < 0) + return 1; + + ret = nlsock_sendmsg(nlsk, NULL); + if (ret < 0) + return 83; + ret = nlsock_process_reply(nlsk, nomsg_reply_cb, nlctx); + if (ret == 0) + return 0; + else + return nlctx->exit_code ?: 83; +} |