45203a3b38
struct gnet_stats_rate_est contains u32 fields, so the bytes per second field can wrap at 34360Mbit. Add a new gnet_stats_rate_est64 structure to get 64bit bps/pps fields, and switch the kernel to use this structure natively. This structure is dumped to user space as a new attribute : TCA_STATS_RATE_EST64 Old tc command will now display the capped bps (to 34360Mbit), instead of wrapped values, and updated tc command will display correct information. Old tc command output, after patch : eric:~# tc -s -d qd sh dev lo qdisc pfifo 8001: root refcnt 2 limit 1000p Sent 80868245400 bytes 1978837 pkt (dropped 0, overlimits 0 requeues 0) rate 34360Mbit 189696pps backlog 0b 0p requeues 0 This patch carefully reorganizes "struct Qdisc" layout to get optimal performance on SMP. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
#ifndef __NET_GEN_STATS_H
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#define __NET_GEN_STATS_H
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#include <linux/gen_stats.h>
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#include <linux/socket.h>
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#include <linux/rtnetlink.h>
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#include <linux/pkt_sched.h>
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struct gnet_dump {
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spinlock_t * lock;
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struct sk_buff * skb;
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struct nlattr * tail;
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/* Backward compatibility */
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int compat_tc_stats;
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int compat_xstats;
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void * xstats;
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int xstats_len;
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struct tc_stats tc_stats;
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};
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extern int gnet_stats_start_copy(struct sk_buff *skb, int type,
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spinlock_t *lock, struct gnet_dump *d);
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extern int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
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int tc_stats_type,int xstats_type,
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spinlock_t *lock, struct gnet_dump *d);
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extern int gnet_stats_copy_basic(struct gnet_dump *d,
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struct gnet_stats_basic_packed *b);
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extern int gnet_stats_copy_rate_est(struct gnet_dump *d,
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const struct gnet_stats_basic_packed *b,
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struct gnet_stats_rate_est64 *r);
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extern int gnet_stats_copy_queue(struct gnet_dump *d,
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struct gnet_stats_queue *q);
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extern int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);
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extern int gnet_stats_finish_copy(struct gnet_dump *d);
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extern int gen_new_estimator(struct gnet_stats_basic_packed *bstats,
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struct gnet_stats_rate_est64 *rate_est,
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spinlock_t *stats_lock, struct nlattr *opt);
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extern void gen_kill_estimator(struct gnet_stats_basic_packed *bstats,
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struct gnet_stats_rate_est64 *rate_est);
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extern int gen_replace_estimator(struct gnet_stats_basic_packed *bstats,
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struct gnet_stats_rate_est64 *rate_est,
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spinlock_t *stats_lock, struct nlattr *opt);
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extern bool gen_estimator_active(const struct gnet_stats_basic_packed *bstats,
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const struct gnet_stats_rate_est64 *rate_est);
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#endif
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