void can_stat_update(unsigned long data)
{
unsigned long j = jiffies;
if (user_reset)
can_init_stats();
if (j < can_stats.jiffies_init)
can_init_stats();
if (can_stats.rx_frames > (ULONG_MAX / HZ))
can_init_stats();
if (can_stats.tx_frames > (ULONG_MAX / HZ))
can_init_stats();
if (can_stats.matches > (ULONG_MAX / 100))
can_init_stats();
if (can_stats.rx_frames)
can_stats.total_rx_match_ratio = (can_stats.matches * 100) /
can_stats.rx_frames;
can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j,
can_stats.tx_frames);
can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j,
can_stats.rx_frames);
if (can_stats.rx_frames_delta)
can_stats.current_rx_match_ratio =
(can_stats.matches_delta * 100) /
can_stats.rx_frames_delta;
can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta);
can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta);
if (can_stats.max_tx_rate < can_stats.current_tx_rate)
can_stats.max_tx_rate = can_stats.current_tx_rate;
if (can_stats.max_rx_rate < can_stats.current_rx_rate)
can_stats.max_rx_rate = can_stats.current_rx_rate;
if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio)
can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio;
can_stats.tx_frames_delta = 0;
can_stats.rx_frames_delta = 0;
can_stats.matches_delta = 0;
mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
}
void can_stat_update(unsigned long data)
{
unsigned long j = jiffies; /* snapshot */
/* restart counting in timer context on user request */
if (user_reset)
can_init_stats();
/* restart counting on jiffies overflow */
if (j < can_stats.jiffies_init)
can_init_stats();
/* prevent overflow in calc_rate() */
if (can_stats.rx_frames > (ULONG_MAX / HZ))
can_init_stats();
/* prevent overflow in calc_rate() */
if (can_stats.tx_frames > (ULONG_MAX / HZ))
can_init_stats();
/* matches overflow - very improbable */
if (can_stats.matches > (ULONG_MAX / 100))
can_init_stats();
/* calc total values */
if (can_stats.rx_frames)
can_stats.total_rx_match_ratio = (can_stats.matches * 100) /
can_stats.rx_frames;
can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j,
can_stats.tx_frames);
can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j,
can_stats.rx_frames);
/* calc current values */
if (can_stats.rx_frames_delta)
can_stats.current_rx_match_ratio =
(can_stats.matches_delta * 100) /
can_stats.rx_frames_delta;
can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta);
can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta);
/* check / update maximum values */
if (can_stats.max_tx_rate < can_stats.current_tx_rate)
can_stats.max_tx_rate = can_stats.current_tx_rate;
if (can_stats.max_rx_rate < can_stats.current_rx_rate)
can_stats.max_rx_rate = can_stats.current_rx_rate;
if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio)
can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio;
/* clear values for 'current rate' calculation */
can_stats.tx_frames_delta = 0;
can_stats.rx_frames_delta = 0;
can_stats.matches_delta = 0;
/* restart timer (one second) */
mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
}
void can_stat_update(struct timer_list *t)
{
struct net *net = from_timer(net, t, can.can_stattimer);
struct s_stats *can_stats = net->can.can_stats;
unsigned long j = jiffies; /* snapshot */
/* restart counting in timer context on user request */
if (user_reset)
can_init_stats(net);
/* restart counting on jiffies overflow */
if (j < can_stats->jiffies_init)
can_init_stats(net);
/* prevent overflow in calc_rate() */
if (can_stats->rx_frames > (ULONG_MAX / HZ))
can_init_stats(net);
/* prevent overflow in calc_rate() */
if (can_stats->tx_frames > (ULONG_MAX / HZ))
can_init_stats(net);
/* matches overflow - very improbable */
if (can_stats->matches > (ULONG_MAX / 100))
can_init_stats(net);
/* calc total values */
if (can_stats->rx_frames)
can_stats->total_rx_match_ratio = (can_stats->matches * 100) /
can_stats->rx_frames;
can_stats->total_tx_rate = calc_rate(can_stats->jiffies_init, j,
can_stats->tx_frames);
can_stats->total_rx_rate = calc_rate(can_stats->jiffies_init, j,
can_stats->rx_frames);
/* calc current values */
if (can_stats->rx_frames_delta)
can_stats->current_rx_match_ratio =
(can_stats->matches_delta * 100) /
can_stats->rx_frames_delta;
can_stats->current_tx_rate = calc_rate(0, HZ, can_stats->tx_frames_delta);
can_stats->current_rx_rate = calc_rate(0, HZ, can_stats->rx_frames_delta);
/* check / update maximum values */
if (can_stats->max_tx_rate < can_stats->current_tx_rate)
can_stats->max_tx_rate = can_stats->current_tx_rate;
if (can_stats->max_rx_rate < can_stats->current_rx_rate)
can_stats->max_rx_rate = can_stats->current_rx_rate;
if (can_stats->max_rx_match_ratio < can_stats->current_rx_match_ratio)
can_stats->max_rx_match_ratio = can_stats->current_rx_match_ratio;
/* clear values for 'current rate' calculation */
can_stats->tx_frames_delta = 0;
can_stats->rx_frames_delta = 0;
can_stats->matches_delta = 0;
/* restart timer (one second) */
mod_timer(&net->can.can_stattimer, round_jiffies(jiffies + HZ));
}
