diff options
Diffstat (limited to 'netlink/fec.c')
| -rw-r--r-- | netlink/fec.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/netlink/fec.c b/netlink/fec.c new file mode 100644 index 0000000..6027dc0 --- /dev/null +++ b/netlink/fec.c @@ -0,0 +1,360 @@ +/* + * fec.c - netlink implementation of FEC commands + * + * Implementation of "ethtool --show-fec <dev>" and + * "ethtool --set-fec <dev> ..." + */ + +#include <errno.h> +#include <ctype.h> +#include <inttypes.h> +#include <string.h> +#include <strings.h> +#include <stdio.h> + +#include "../internal.h" +#include "../common.h" +#include "netlink.h" +#include "bitset.h" +#include "parser.h" + +/* FEC_GET */ + +static void +fec_mode_walk(unsigned int idx, const char *name, bool val, void *data) +{ + bool *empty = data; + + if (!val) + return; + if (empty) + *empty = false; + + /* Rename None to Off - in legacy ioctl None means "not supported" + * rather than supported but disabled. + */ + if (idx == ETHTOOL_LINK_MODE_FEC_NONE_BIT) + name = "Off"; + /* Rename to match the ioctl letter case */ + else if (idx == ETHTOOL_LINK_MODE_FEC_BASER_BIT) + name = "BaseR"; + + print_string(PRINT_ANY, NULL, " %s", name); +} + +static int fec_show_stats(const struct nlattr *nest) +{ + const struct nlattr *tb[ETHTOOL_A_FEC_STAT_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + static const struct { + unsigned int attr; + char *name; + } stats[] = { + { ETHTOOL_A_FEC_STAT_CORRECTED, "corrected_blocks" }, + { ETHTOOL_A_FEC_STAT_UNCORR, "uncorrectable_blocks" }, + { ETHTOOL_A_FEC_STAT_CORR_BITS, "corrected_bits" }, + }; + bool header = false; + unsigned int i; + 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++) { + uint64_t *vals; + int lanes, l; + + if (!tb[stats[i].attr] || + !mnl_attr_get_payload_len(tb[stats[i].attr])) + continue; + + if (!header && !is_json_context()) { + printf("Statistics:\n"); + header = true; + } + + if (mnl_attr_get_payload_len(tb[stats[i].attr]) % 8) { + fprintf(stderr, "malformed netlink message (statistic)\n"); + goto err_close_stats; + } + + vals = mnl_attr_get_payload(tb[stats[i].attr]); + lanes = mnl_attr_get_payload_len(tb[stats[i].attr]) / 8 - 1; + + if (!is_json_context()) { + fprintf(stdout, " %s: %" PRIu64 "\n", + stats[i].name, *vals++); + } else { + open_json_object(stats[i].name); + print_u64(PRINT_JSON, "total", NULL, *vals++); + } + + if (lanes) + open_json_array("lanes", ""); + for (l = 0; l < lanes; l++) { + if (!is_json_context()) + fprintf(stdout, " Lane %d: %" PRIu64 "\n", + l, *vals++); + else + print_u64(PRINT_JSON, NULL, NULL, *vals++); + } + if (lanes) + close_json_array(""); + + close_json_object(); + } + close_json_object(); + + return 0; + +err_close_stats: + close_json_object(); + return -1; +} + +int fec_reply_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_FEC_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + struct nl_context *nlctx = data; + const struct stringset *lm_strings; + const char *name; + bool fa, empty; + bool silent; + int err_ret; + u32 active; + 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_FEC_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + ret = netlink_init_ethnl2_socket(nlctx); + if (ret < 0) + return err_ret; + lm_strings = global_stringset(ETH_SS_LINK_MODES, nlctx->ethnl2_socket); + + active = 0; + if (tb[ETHTOOL_A_FEC_ACTIVE]) + active = mnl_attr_get_u32(tb[ETHTOOL_A_FEC_ACTIVE]); + + if (silent) + print_nl(); + + open_json_object(NULL); + + print_string(PRINT_ANY, "ifname", "FEC parameters for %s:\n", + nlctx->devname); + + open_json_array("config", "Supported/Configured FEC encodings:"); + fa = tb[ETHTOOL_A_FEC_AUTO] && mnl_attr_get_u8(tb[ETHTOOL_A_FEC_AUTO]); + if (fa) + print_string(PRINT_ANY, NULL, " %s", "Auto"); + empty = !fa; + + ret = walk_bitset(tb[ETHTOOL_A_FEC_MODES], lm_strings, fec_mode_walk, + &empty); + if (ret < 0) + goto err_close_dev; + if (empty) + print_string(PRINT_ANY, NULL, " %s", "None"); + close_json_array("\n"); + + open_json_array("active", "Active FEC encoding:"); + if (active) { + name = get_string(lm_strings, active); + if (name) + /* Take care of renames */ + fec_mode_walk(active, name, true, NULL); + else + print_uint(PRINT_ANY, NULL, " BIT%u", active); + } else { + print_string(PRINT_ANY, NULL, " %s", "None"); + } + close_json_array("\n"); + + if (tb[ETHTOOL_A_FEC_STATS]) { + ret = fec_show_stats(tb[ETHTOOL_A_FEC_STATS]); + if (ret < 0) + goto err_close_dev; + } + + close_json_object(); + + return MNL_CB_OK; + +err_close_dev: + close_json_object(); + return err_ret; +} + +int nl_gfec(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_FEC_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_FEC_GET, + ETHTOOL_A_FEC_HEADER); + ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_FEC_GET, + ETHTOOL_A_FEC_HEADER, flags); + if (ret < 0) + return ret; + + new_json_obj(ctx->json); + ret = nlsock_send_get_request(nlsk, fec_reply_cb); + delete_json_obj(); + return ret; +} + +/* FEC_SET */ + +static void strupc(char *dst, const char *src) +{ + while (*src) + *dst++ = toupper(*src++); + *dst = '\0'; +} + +static int fec_parse_bitset(struct nl_context *nlctx, uint16_t type, + const void *data __maybe_unused, + struct nl_msg_buff *msgbuff, void *dest) +{ + struct nlattr *bitset_attr; + struct nlattr *bits_attr; + struct nlattr *bit_attr; + char upper[ETH_GSTRING_LEN]; + bool fec_auto = false; + int ret; + + if (!type || dest) { + fprintf(stderr, "ethtool (%s): internal error parsing '%s'\n", + nlctx->cmd, nlctx->param); + return -EFAULT; + } + + bitset_attr = ethnla_nest_start(msgbuff, type); + if (!bitset_attr) + return -EMSGSIZE; + ret = -EMSGSIZE; + if (ethnla_put_flag(msgbuff, ETHTOOL_A_BITSET_NOMASK, true)) + goto err; + bits_attr = ethnla_nest_start(msgbuff, ETHTOOL_A_BITSET_BITS); + if (!bits_attr) + goto err; + + while (nlctx->argc > 0) { + const char *name = *nlctx->argp; + + if (!strcmp(name, "--")) { + nlctx->argp++; + nlctx->argc--; + break; + } + + if (!strcasecmp(name, "auto")) { + fec_auto = true; + goto next; + } + if (!strcasecmp(name, "off")) { + name = "None"; + } else { + strupc(upper, name); + name = upper; + } + + ret = -EMSGSIZE; + bit_attr = ethnla_nest_start(msgbuff, + ETHTOOL_A_BITSET_BITS_BIT); + if (!bit_attr) + goto err; + if (ethnla_put_strz(msgbuff, ETHTOOL_A_BITSET_BIT_NAME, name)) + goto err; + ethnla_nest_end(msgbuff, bit_attr); + +next: + nlctx->argp++; + nlctx->argc--; + } + + ethnla_nest_end(msgbuff, bits_attr); + ethnla_nest_end(msgbuff, bitset_attr); + + if (ethnla_put_u8(msgbuff, ETHTOOL_A_FEC_AUTO, fec_auto)) + goto err; + + return 0; +err: + ethnla_nest_cancel(msgbuff, bitset_attr); + return ret; +} + +static const struct param_parser sfec_params[] = { + { + .arg = "encoding", + .type = ETHTOOL_A_FEC_MODES, + .handler = fec_parse_bitset, + .min_argc = 1, + }, + {} +}; + +int nl_sfec(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_FEC_SET, false)) + return -EOPNOTSUPP; + if (!ctx->argc) { + fprintf(stderr, "ethtool (--set-fec): parameters missing\n"); + return 1; + } + + nlctx->cmd = "--set-fec"; + 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_FEC_SET, + NLM_F_REQUEST | NLM_F_ACK); + if (ret < 0) + return 2; + if (ethnla_fill_header(msgbuff, ETHTOOL_A_FEC_HEADER, + ctx->devname, 0)) + return -EMSGSIZE; + + ret = nl_parser(nlctx, sfec_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; +} |