qdisc: add TCA_XSTATS stats for fq qdisc. #980
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When using fq, we rely on xstats useful metrics to check fq behavior and diangosis, it is what can be seen from iproute2 tools, `tc -s qdisc show` as well. It exposes metrics as: https://github.com/iproute2/iproute2/blob/main/include/uapi/linux/pkt_sched.h#L847 Signed-off-by: Kangjie Xu <[email protected]>
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When using fq, we rely on xstats useful metrics to check fq behavior and diangosis, it is what can be seen from iproute2 tools,
tc -s qdisc showas well. It exposes metrics as:https://github.com/iproute2/iproute2/blob/main/include/uapi/linux/pkt_sched.h#L847