diff options
| -rw-r--r-- | drivers/char/random.c | 4 | ||||
| -rw-r--r-- | include/trace/events/random.h | 33 |
2 files changed, 35 insertions, 2 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 867b823e7fea..80b58774e891 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -711,6 +711,7 @@ void add_device_randomness(const void *buf, unsigned int size) { unsigned long time = random_get_entropy() ^ jiffies; + trace_add_device_randomness(size, _RET_IP_); mix_pool_bytes(&input_pool, buf, size, NULL); mix_pool_bytes(&input_pool, &time, sizeof(time), NULL); mix_pool_bytes(&nonblocking_pool, buf, size, NULL); @@ -1127,6 +1128,7 @@ static ssize_t extract_entropy_user(struct entropy_store *r, void __user *buf, */ void get_random_bytes(void *buf, int nbytes) { + trace_get_random_bytes(nbytes, _RET_IP_); extract_entropy(&nonblocking_pool, buf, nbytes, 0, 0); } EXPORT_SYMBOL(get_random_bytes); @@ -1145,7 +1147,7 @@ void get_random_bytes_arch(void *buf, int nbytes) { char *p = buf; - trace_get_random_bytes(nbytes, _RET_IP_); + trace_get_random_bytes_arch(nbytes, _RET_IP_); while (nbytes) { unsigned long v; int chunk = min(nbytes, (int)sizeof(unsigned long)); diff --git a/include/trace/events/random.h b/include/trace/events/random.h index 422df19de732..2ffcaec5860a 100644 --- a/include/trace/events/random.h +++ b/include/trace/events/random.h @@ -7,6 +7,25 @@ #include <linux/writeback.h> #include <linux/tracepoint.h> +TRACE_EVENT(add_device_randomness, + TP_PROTO(int bytes, unsigned long IP), + + TP_ARGS(bytes, IP), + + TP_STRUCT__entry( + __field( int, bytes ) + __field(unsigned long, IP ) + ), + + TP_fast_assign( + __entry->bytes = bytes; + __entry->IP = IP; + ), + + TP_printk("bytes %d caller %pF", + __entry->bytes, (void *)__entry->IP) +); + DECLARE_EVENT_CLASS(random__mix_pool_bytes, TP_PROTO(const char *pool_name, int bytes, unsigned long IP), @@ -68,7 +87,7 @@ TRACE_EVENT(credit_entropy_bits, (void *)__entry->IP) ); -TRACE_EVENT(get_random_bytes, +DECLARE_EVENT_CLASS(random__get_random_bytes, TP_PROTO(int nbytes, unsigned long IP), TP_ARGS(nbytes, IP), @@ -86,6 +105,18 @@ TRACE_EVENT(get_random_bytes, TP_printk("nbytes %d caller %pF", __entry->nbytes, (void *)__entry->IP) ); +DEFINE_EVENT(random__get_random_bytes, get_random_bytes, + TP_PROTO(int nbytes, unsigned long IP), + + TP_ARGS(nbytes, IP) +); + +DEFINE_EVENT(random__get_random_bytes, get_random_bytes_arch, + TP_PROTO(int nbytes, unsigned long IP), + + TP_ARGS(nbytes, IP) +); + DECLARE_EVENT_CLASS(random__extract_entropy, TP_PROTO(const char *pool_name, int nbytes, int entropy_count, unsigned long IP), |