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c1a8f1f1c8
In 5e140dfc1f "net: reorder struct Qdisc
for better SMP performance" the definition of struct gnet_stats_basic
changed incompatibly, as copies of this struct are shipped to
userland via netlink.
Restoring old behavior is not welcome, for performance reason.
Fix is to use a private structure for kernel, and
teach gnet_stats_copy_basic() to convert from kernel to user land,
using legacy structure (struct gnet_stats_basic)
Based on a report and initial patch from Michael Spang.
Reported-by: Michael Spang <mspang@csclub.uwaterloo.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
73 lines
1.3 KiB
C
73 lines
1.3 KiB
C
#ifndef __LINUX_GEN_STATS_H
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#define __LINUX_GEN_STATS_H
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#include <linux/types.h>
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enum {
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TCA_STATS_UNSPEC,
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TCA_STATS_BASIC,
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TCA_STATS_RATE_EST,
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TCA_STATS_QUEUE,
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TCA_STATS_APP,
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__TCA_STATS_MAX,
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};
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#define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
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/**
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* struct gnet_stats_basic - byte/packet throughput statistics
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* @bytes: number of seen bytes
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* @packets: number of seen packets
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*/
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struct gnet_stats_basic
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{
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__u64 bytes;
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__u32 packets;
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};
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struct gnet_stats_basic_packed
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{
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__u64 bytes;
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__u32 packets;
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} __attribute__ ((packed));
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/**
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* struct gnet_stats_rate_est - rate estimator
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* @bps: current byte rate
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* @pps: current packet rate
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*/
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struct gnet_stats_rate_est
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{
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__u32 bps;
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__u32 pps;
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};
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/**
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* struct gnet_stats_queue - queuing statistics
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* @qlen: queue length
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* @backlog: backlog size of queue
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* @drops: number of dropped packets
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* @requeues: number of requeues
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* @overlimits: number of enqueues over the limit
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*/
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struct gnet_stats_queue
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{
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__u32 qlen;
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__u32 backlog;
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__u32 drops;
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__u32 requeues;
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__u32 overlimits;
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};
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/**
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* struct gnet_estimator - rate estimator configuration
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* @interval: sampling period
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* @ewma_log: the log of measurement window weight
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*/
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struct gnet_estimator
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{
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signed char interval;
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unsigned char ewma_log;
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};
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#endif /* __LINUX_GEN_STATS_H */
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