diff options
Diffstat (limited to '')
| -rw-r--r-- | netlink/pause.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/netlink/pause.c b/netlink/pause.c new file mode 100644 index 0000000..867d0da --- /dev/null +++ b/netlink/pause.c @@ -0,0 +1,308 @@ +/* + * pause.c - netlink implementation of pause commands + * + * Implementation of "ethtool -a <dev>" and "ethtool -A <dev> ..." + */ + +#include <errno.h> +#include <inttypes.h> +#include <string.h> +#include <stdio.h> + +#include "../internal.h" +#include "../common.h" +#include "netlink.h" +#include "bitset.h" +#include "parser.h" + +/* PAUSE_GET */ + +struct pause_autoneg_status { + bool pause; + bool asym_pause; +}; + +static void pause_autoneg_walker(unsigned int idx, + const char *name __maybe_unused, bool val, + void *data) +{ + struct pause_autoneg_status *status = data; + + if (idx == ETHTOOL_LINK_MODE_Pause_BIT) + status->pause = val; + if (idx == ETHTOOL_LINK_MODE_Asym_Pause_BIT) + status->asym_pause = val; +} + +static int pause_autoneg_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + struct pause_autoneg_status ours = {}; + struct pause_autoneg_status peer = {}; + struct nl_context *nlctx = data; + uint8_t rx_status = false; + uint8_t tx_status = false; + 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; + + if (!tb[ETHTOOL_A_LINKMODES_OURS] || !tb[ETHTOOL_A_LINKMODES_PEER]) + return MNL_CB_OK; + ret = walk_bitset(tb[ETHTOOL_A_LINKMODES_OURS], NULL, + pause_autoneg_walker, &ours); + if (ret < 0) + return err_ret; + ret = walk_bitset(tb[ETHTOOL_A_LINKMODES_PEER], NULL, + pause_autoneg_walker, &peer); + if (ret < 0) + return err_ret; + + if (ours.pause && peer.pause) { + rx_status = true; + tx_status = true; + } else if (ours.asym_pause && peer.asym_pause) { + if (ours.pause) + rx_status = true; + else if (peer.pause) + tx_status = true; + } + + open_json_object("negotiated"); + show_bool_val("rx", "RX negotiated: %s\n", &rx_status); + show_bool_val("tx", "TX negotiated: %s\n", &tx_status); + close_json_object(); + + return MNL_CB_OK; +} + +static int show_pause_autoneg_status(struct nl_context *nlctx) +{ + const char *saved_devname; + int ret; + + saved_devname = nlctx->ctx->devname; + nlctx->ctx->devname = nlctx->devname; + ret = netlink_init_ethnl2_socket(nlctx); + if (ret < 0) + goto out; + + ret = nlsock_prep_get_request(nlctx->ethnl2_socket, + ETHTOOL_MSG_LINKMODES_GET, + ETHTOOL_A_LINKMODES_HEADER, + ETHTOOL_FLAG_COMPACT_BITSETS); + if (ret < 0) + goto out; + ret = nlsock_send_get_request(nlctx->ethnl2_socket, pause_autoneg_cb); + +out: + nlctx->ctx->devname = saved_devname; + return ret; +} + +static int show_pause_stats(const struct nlattr *nest) +{ + const struct nlattr *tb[ETHTOOL_A_PAUSE_STAT_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + static const struct { + unsigned int attr; + char *name; + } stats[] = { + { ETHTOOL_A_PAUSE_STAT_TX_FRAMES, "tx_pause_frames" }, + { ETHTOOL_A_PAUSE_STAT_RX_FRAMES, "rx_pause_frames" }, + }; + bool header = false; + unsigned int i; + size_t n; + int ret; + + ret = mnl_attr_parse_nested(nest, attr_cb, &tb_info); + if (ret < 0) + return ret; + + open_json_object("statistics"); + for (i = 0; i < ARRAY_SIZE(stats); i++) { + char fmt[32]; + + if (!tb[stats[i].attr]) + continue; + + if (!header && !is_json_context()) { + printf("Statistics:\n"); + header = true; + } + + if (mnl_attr_validate(tb[stats[i].attr], MNL_TYPE_U64)) { + fprintf(stderr, "malformed netlink message (statistic)\n"); + goto err_close_stats; + } + + n = snprintf(fmt, sizeof(fmt), " %s: %%" PRIu64 "\n", + stats[i].name); + if (n >= sizeof(fmt)) { + fprintf(stderr, "internal error - malformed label\n"); + goto err_close_stats; + } + + print_u64(PRINT_ANY, stats[i].name, fmt, + mnl_attr_get_u64(tb[stats[i].attr])); + } + close_json_object(); + + return 0; + +err_close_stats: + close_json_object(); + return -1; +} + +int pause_reply_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_PAUSE_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_PAUSE_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + if (silent) + print_nl(); + + open_json_object(NULL); + + print_string(PRINT_ANY, "ifname", "Pause parameters for %s:\n", + nlctx->devname); + + show_bool("autonegotiate", "Autonegotiate:\t%s\n", + tb[ETHTOOL_A_PAUSE_AUTONEG]); + show_bool("rx", "RX:\t\t%s\n", tb[ETHTOOL_A_PAUSE_RX]); + show_bool("tx", "TX:\t\t%s\n", tb[ETHTOOL_A_PAUSE_TX]); + + if (!nlctx->is_monitor && tb[ETHTOOL_A_PAUSE_AUTONEG] && + mnl_attr_get_u8(tb[ETHTOOL_A_PAUSE_AUTONEG])) { + ret = show_pause_autoneg_status(nlctx); + if (ret < 0) + goto err_close_dev; + } + if (tb[ETHTOOL_A_PAUSE_STATS]) { + ret = show_pause_stats(tb[ETHTOOL_A_PAUSE_STATS]); + if (ret < 0) + goto err_close_dev; + } + if (!silent) + print_nl(); + + close_json_object(); + + return MNL_CB_OK; + +err_close_dev: + close_json_object(); + return err_ret; +} + +int nl_gpause(struct cmd_context *ctx) +{ + struct nl_context *nlctx = ctx->nlctx; + struct nl_socket *nlsk = nlctx->ethnl_socket; + u32 flags; + int ret; + + if (netlink_cmd_check(ctx, ETHTOOL_MSG_PAUSE_GET, true)) + return -EOPNOTSUPP; + if (ctx->argc > 0) { + fprintf(stderr, "ethtool: unexpected parameter '%s'\n", + *ctx->argp); + return 1; + } + + flags = get_stats_flag(nlctx, ETHTOOL_MSG_PAUSE_GET, + ETHTOOL_A_PAUSE_HEADER); + ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_PAUSE_GET, + ETHTOOL_A_PAUSE_HEADER, flags); + if (ret < 0) + return ret; + + new_json_obj(ctx->json); + ret = nlsock_send_get_request(nlsk, pause_reply_cb); + delete_json_obj(); + return ret; +} + +/* PAUSE_SET */ + +static const struct param_parser spause_params[] = { + { + .arg = "autoneg", + .type = ETHTOOL_A_PAUSE_AUTONEG, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + { + .arg = "rx", + .type = ETHTOOL_A_PAUSE_RX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + { + .arg = "tx", + .type = ETHTOOL_A_PAUSE_TX, + .handler = nl_parse_u8bool, + .min_argc = 1, + }, + {} +}; + +int nl_spause(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_PAUSE_SET, false)) + return -EOPNOTSUPP; + + nlctx->cmd = "-A"; + 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_PAUSE_SET, + NLM_F_REQUEST | NLM_F_ACK); + if (ret < 0) + return 2; + if (ethnla_fill_header(msgbuff, ETHTOOL_A_PAUSE_HEADER, + ctx->devname, 0)) + return -EMSGSIZE; + + ret = nl_parser(nlctx, spause_params, NULL, PARSER_GROUP_NONE, NULL); + if (ret < 0) + return 1; + + ret = nlsock_sendmsg(nlsk, NULL); + if (ret < 0) + return 76; + ret = nlsock_process_reply(nlsk, nomsg_reply_cb, nlctx); + if (ret == 0) + return 0; + else + return nlctx->exit_code ?: 76; +} |