forked from mirrors/linux
85674625e0
Add a protocol spec for tcp_metrics, so that it's accessible via YNL.
Useful at the very least for testing fixes.
In this episode of "10,000 ways to complicate netlink" the metric
nest has defines which are off by 1. iproute2 does:
struct rtattr *m[TCP_METRIC_MAX + 1 + 1];
parse_rtattr_nested(m, TCP_METRIC_MAX + 1, a);
for (i = 0; i < TCP_METRIC_MAX + 1; i++) {
// ...
attr = m[i + 1];
This is too weird to support in YNL, add a new set of defines
with _correct_ values to the official kernel header.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
77 lines
2 KiB
C
77 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* tcp_metrics.h - TCP Metrics Interface */
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#ifndef _UAPI_LINUX_TCP_METRICS_H
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#define _UAPI_LINUX_TCP_METRICS_H
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#include <linux/types.h>
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/* NETLINK_GENERIC related info
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*/
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#define TCP_METRICS_GENL_NAME "tcp_metrics"
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#define TCP_METRICS_GENL_VERSION 0x1
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enum tcp_metric_index {
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TCP_METRIC_RTT, /* in ms units */
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TCP_METRIC_RTTVAR, /* in ms units */
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TCP_METRIC_SSTHRESH,
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TCP_METRIC_CWND,
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TCP_METRIC_REORDERING,
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TCP_METRIC_RTT_US, /* in usec units */
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TCP_METRIC_RTTVAR_US, /* in usec units */
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/* Always last. */
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__TCP_METRIC_MAX,
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};
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#define TCP_METRIC_MAX (__TCP_METRIC_MAX - 1)
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/* Re-define enum tcp_metric_index, again, using the values carried
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* as netlink attribute types.
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*/
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enum {
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TCP_METRICS_A_METRICS_RTT = 1,
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TCP_METRICS_A_METRICS_RTTVAR,
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TCP_METRICS_A_METRICS_SSTHRESH,
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TCP_METRICS_A_METRICS_CWND,
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TCP_METRICS_A_METRICS_REODERING,
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TCP_METRICS_A_METRICS_RTT_US,
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TCP_METRICS_A_METRICS_RTTVAR_US,
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__TCP_METRICS_A_METRICS_MAX
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};
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#define TCP_METRICS_A_METRICS_MAX (__TCP_METRICS_A_METRICS_MAX - 1)
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enum {
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TCP_METRICS_ATTR_UNSPEC,
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TCP_METRICS_ATTR_ADDR_IPV4, /* u32 */
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TCP_METRICS_ATTR_ADDR_IPV6, /* binary */
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TCP_METRICS_ATTR_AGE, /* msecs */
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TCP_METRICS_ATTR_TW_TSVAL, /* u32, raw, rcv tsval */
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TCP_METRICS_ATTR_TW_TS_STAMP, /* s32, sec age */
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TCP_METRICS_ATTR_VALS, /* nested +1, u32 */
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TCP_METRICS_ATTR_FOPEN_MSS, /* u16 */
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TCP_METRICS_ATTR_FOPEN_SYN_DROPS, /* u16, count of drops */
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TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS, /* msecs age */
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TCP_METRICS_ATTR_FOPEN_COOKIE, /* binary */
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TCP_METRICS_ATTR_SADDR_IPV4, /* u32 */
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TCP_METRICS_ATTR_SADDR_IPV6, /* binary */
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TCP_METRICS_ATTR_PAD,
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__TCP_METRICS_ATTR_MAX,
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};
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#define TCP_METRICS_ATTR_MAX (__TCP_METRICS_ATTR_MAX - 1)
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enum {
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TCP_METRICS_CMD_UNSPEC,
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TCP_METRICS_CMD_GET,
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TCP_METRICS_CMD_DEL,
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__TCP_METRICS_CMD_MAX,
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};
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#define TCP_METRICS_CMD_MAX (__TCP_METRICS_CMD_MAX - 1)
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#endif /* _UAPI_LINUX_TCP_METRICS_H */
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