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rxrpc: Add connection tracepoint and client conn state tracepoint

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Add a pair of tracepoints, one to track rxrpc_connection struct ref
counting and the other to track the client connection cache state.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-09-17 10:49:14 +01:00
parent a84a46d730
commit 363deeab6d
9 changed files with 273 additions and 58 deletions
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76
net/rxrpc/ar-internal.h
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@@ -314,6 +314,7 @@ enum rxrpc_conn_cache_state {
RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
RXRPC_CONN__NR_CACHE_STATES
};
/*
@@ -533,6 +534,44 @@ struct rxrpc_call {
rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
};
enum rxrpc_conn_trace {
rxrpc_conn_new_client,
rxrpc_conn_new_service,
rxrpc_conn_queued,
rxrpc_conn_seen,
rxrpc_conn_got,
rxrpc_conn_put_client,
rxrpc_conn_put_service,
rxrpc_conn__nr_trace
};
extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4];
enum rxrpc_client_trace {
rxrpc_client_activate_chans,
rxrpc_client_alloc,
rxrpc_client_chan_activate,
rxrpc_client_chan_disconnect,
rxrpc_client_chan_pass,
rxrpc_client_chan_unstarted,
rxrpc_client_cleanup,
rxrpc_client_count,
rxrpc_client_discard,
rxrpc_client_duplicate,
rxrpc_client_exposed,
rxrpc_client_replace,
rxrpc_client_to_active,
rxrpc_client_to_culled,
rxrpc_client_to_idle,
rxrpc_client_to_inactive,
rxrpc_client_to_waiting,
rxrpc_client_uncount,
rxrpc_client__nr_trace
};
extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7];
extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5];
enum rxrpc_call_trace {
rxrpc_call_new_client,
rxrpc_call_new_service,
@@ -734,7 +773,11 @@ struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
void rxrpc_disconnect_call(struct rxrpc_call *);
void rxrpc_kill_connection(struct rxrpc_connection *);
void __rxrpc_put_connection(struct rxrpc_connection *);
bool rxrpc_queue_conn(struct rxrpc_connection *);
void rxrpc_see_connection(struct rxrpc_connection *);
void rxrpc_get_connection(struct rxrpc_connection *);
struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
void rxrpc_put_service_conn(struct rxrpc_connection *);
void __exit rxrpc_destroy_all_connections(void);
static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
@@ -747,38 +790,15 @@ static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
return !rxrpc_conn_is_client(conn);
}
static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
{
atomic_inc(&conn->usage);
}
static inline
struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
{
return atomic_inc_not_zero(&conn->usage) ? conn : NULL;
}
static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
{
if (!conn)
return;
if (rxrpc_conn_is_client(conn)) {
if (atomic_dec_and_test(&conn->usage))
rxrpc_put_client_conn(conn);
} else {
if (atomic_dec_return(&conn->usage) == 1)
__rxrpc_put_connection(conn);
}
}
static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn)
{
if (!rxrpc_get_connection_maybe(conn))
return false;
if (!rxrpc_queue_work(&conn->processor))
rxrpc_put_connection(conn);
return true;
if (rxrpc_conn_is_client(conn))
rxrpc_put_client_conn(conn);
else
rxrpc_put_service_conn(conn);
}
/*