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kcm: Add statistics and proc interfaces

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This patch adds various counters for KCM. These include counters for
messages and bytes received or sent, as well as counters for number of
attached/unattached TCP sockets and other error or edge events.

The statistics are exposed via a proc interface. /proc/net/kcm provides
statistics per KCM socket and per psock (attached TCP sockets).
/proc/net/kcm_stats provides aggregate statistics.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2016-03-07 14:11:07 -08:00 • committed by David S. Miller
parent ab7ac4eb98
commit cd6e111bf5
4 changed files with 597 additions and 1 deletions
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94
include/net/kcm.h
View file

@ -17,6 +17,42 @@
extern unsigned int kcm_net_id;
#define KCM_STATS_ADD(stat, count) ((stat) += (count))
#define KCM_STATS_INCR(stat) ((stat)++)
struct kcm_psock_stats {
unsigned long long rx_msgs;
unsigned long long rx_bytes;
unsigned long long tx_msgs;
unsigned long long tx_bytes;
unsigned int rx_aborts;
unsigned int rx_mem_fail;
unsigned int rx_need_more_hdr;
unsigned int rx_bad_hdr_len;
unsigned long long reserved;
unsigned long long unreserved;
unsigned int tx_aborts;
};
struct kcm_mux_stats {
unsigned long long rx_msgs;
unsigned long long rx_bytes;
unsigned long long tx_msgs;
unsigned long long tx_bytes;
unsigned int rx_ready_drops;
unsigned int tx_retries;
unsigned int psock_attach;
unsigned int psock_unattach_rsvd;
unsigned int psock_unattach;
};
struct kcm_stats {
unsigned long long rx_msgs;
unsigned long long rx_bytes;
unsigned long long tx_msgs;
unsigned long long tx_bytes;
};
struct kcm_tx_msg {
unsigned int sent;
unsigned int fragidx;
@ -41,6 +77,8 @@ struct kcm_sock {
u32 done : 1;
struct work_struct done_work;
struct kcm_stats stats;
/* Transmit */
struct kcm_psock *tx_psock;
struct work_struct tx_work;
@ -77,6 +115,8 @@ struct kcm_psock {
struct list_head psock_list;
struct kcm_psock_stats stats;
/* Receive */
struct sk_buff *rx_skb_head;
struct sk_buff **rx_skb_nextp;
@ -86,15 +126,21 @@ struct kcm_psock {
struct delayed_work rx_delayed_work;
struct bpf_prog *bpf_prog;
struct kcm_sock *rx_kcm;
unsigned long long saved_rx_bytes;
unsigned long long saved_rx_msgs;
/* Transmit */
struct kcm_sock *tx_kcm;
struct list_head psock_avail_list;
unsigned long long saved_tx_bytes;
unsigned long long saved_tx_msgs;
};
/* Per net MUX list */
struct kcm_net {
struct mutex mutex;
struct kcm_psock_stats aggregate_psock_stats;
struct kcm_mux_stats aggregate_mux_stats;
struct list_head mux_list;
int count;
};
@ -110,6 +156,9 @@ struct kcm_mux {
struct list_head psocks; /* List of all psocks on MUX */
int psocks_cnt; /* Total attached sockets */
struct kcm_mux_stats stats;
struct kcm_psock_stats aggregate_psock_stats;
/* Receive */
spinlock_t rx_lock ____cacheline_aligned_in_smp;
struct list_head kcm_rx_waiters; /* KCMs waiting for receiving */
@ -122,4 +171,49 @@ struct kcm_mux {
struct list_head kcm_tx_waiters; /* KCMs waiting for a TX psock */
};
#ifdef CONFIG_PROC_FS
int kcm_proc_init(void);
void kcm_proc_exit(void);
#else
static int kcm_proc_init(void) { return 0; }
static void kcm_proc_exit(void) { }
#endif
static inline void aggregate_psock_stats(struct kcm_psock_stats *stats,
struct kcm_psock_stats *agg_stats)
{
/* Save psock statistics in the mux when psock is being unattached. */
#define SAVE_PSOCK_STATS(_stat) (agg_stats->_stat += stats->_stat)
SAVE_PSOCK_STATS(rx_msgs);
SAVE_PSOCK_STATS(rx_bytes);
SAVE_PSOCK_STATS(rx_aborts);
SAVE_PSOCK_STATS(rx_mem_fail);
SAVE_PSOCK_STATS(rx_need_more_hdr);
SAVE_PSOCK_STATS(rx_bad_hdr_len);
SAVE_PSOCK_STATS(tx_msgs);
SAVE_PSOCK_STATS(tx_bytes);
SAVE_PSOCK_STATS(reserved);
SAVE_PSOCK_STATS(unreserved);
SAVE_PSOCK_STATS(tx_aborts);
#undef SAVE_PSOCK_STATS
}
static inline void aggregate_mux_stats(struct kcm_mux_stats *stats,
struct kcm_mux_stats *agg_stats)
{
/* Save psock statistics in the mux when psock is being unattached. */
#define SAVE_MUX_STATS(_stat) (agg_stats->_stat += stats->_stat)
SAVE_MUX_STATS(rx_msgs);
SAVE_MUX_STATS(rx_bytes);
SAVE_MUX_STATS(tx_msgs);
SAVE_MUX_STATS(tx_bytes);
SAVE_MUX_STATS(rx_ready_drops);
SAVE_MUX_STATS(psock_attach);
SAVE_MUX_STATS(psock_unattach_rsvd);
SAVE_MUX_STATS(psock_unattach);
#undef SAVE_MUX_STATS
}
#endif /* __NET_KCM_H_ */