mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 10:05:19 +07:00
eb9d1bf079
Immediately after boot, we allow reads from /dev/random before its entropy pool has been fully initialized. Fix this so that we don't allow this until the blocking pool has received 128 bits. We do this by repurposing the initialized flag in the entropy pool struct, and use the initialized flag in the blocking pool to indicate whether it is safe to pull from the blocking pool. To do this, we needed to rework when we decide to push entropy from the input pool to the blocking pool, since the initialized flag for the input pool was used for this purpose. To simplify things, we no longer use the initialized flag for that purpose, nor do we use the entropy_total field any more. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
314 lines
7.1 KiB
C
314 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM random
|
|
|
|
#if !defined(_TRACE_RANDOM_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_RANDOM_H
|
|
|
|
#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 %pS",
|
|
__entry->bytes, (void *)__entry->IP)
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(random__mix_pool_bytes,
|
|
TP_PROTO(const char *pool_name, int bytes, unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, bytes, IP),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, bytes )
|
|
__field(unsigned long, IP )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->bytes = bytes;
|
|
__entry->IP = IP;
|
|
),
|
|
|
|
TP_printk("%s pool: bytes %d caller %pS",
|
|
__entry->pool_name, __entry->bytes, (void *)__entry->IP)
|
|
);
|
|
|
|
DEFINE_EVENT(random__mix_pool_bytes, mix_pool_bytes,
|
|
TP_PROTO(const char *pool_name, int bytes, unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, bytes, IP)
|
|
);
|
|
|
|
DEFINE_EVENT(random__mix_pool_bytes, mix_pool_bytes_nolock,
|
|
TP_PROTO(const char *pool_name, int bytes, unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, bytes, IP)
|
|
);
|
|
|
|
TRACE_EVENT(credit_entropy_bits,
|
|
TP_PROTO(const char *pool_name, int bits, int entropy_count,
|
|
unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, bits, entropy_count, IP),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, bits )
|
|
__field( int, entropy_count )
|
|
__field(unsigned long, IP )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->bits = bits;
|
|
__entry->entropy_count = entropy_count;
|
|
__entry->IP = IP;
|
|
),
|
|
|
|
TP_printk("%s pool: bits %d entropy_count %d caller %pS",
|
|
__entry->pool_name, __entry->bits,
|
|
__entry->entropy_count, (void *)__entry->IP)
|
|
);
|
|
|
|
TRACE_EVENT(push_to_pool,
|
|
TP_PROTO(const char *pool_name, int pool_bits, int input_bits),
|
|
|
|
TP_ARGS(pool_name, pool_bits, input_bits),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, pool_bits )
|
|
__field( int, input_bits )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->pool_bits = pool_bits;
|
|
__entry->input_bits = input_bits;
|
|
),
|
|
|
|
TP_printk("%s: pool_bits %d input_pool_bits %d",
|
|
__entry->pool_name, __entry->pool_bits,
|
|
__entry->input_bits)
|
|
);
|
|
|
|
TRACE_EVENT(debit_entropy,
|
|
TP_PROTO(const char *pool_name, int debit_bits),
|
|
|
|
TP_ARGS(pool_name, debit_bits),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, debit_bits )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->debit_bits = debit_bits;
|
|
),
|
|
|
|
TP_printk("%s: debit_bits %d", __entry->pool_name,
|
|
__entry->debit_bits)
|
|
);
|
|
|
|
TRACE_EVENT(add_input_randomness,
|
|
TP_PROTO(int input_bits),
|
|
|
|
TP_ARGS(input_bits),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, input_bits )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->input_bits = input_bits;
|
|
),
|
|
|
|
TP_printk("input_pool_bits %d", __entry->input_bits)
|
|
);
|
|
|
|
TRACE_EVENT(add_disk_randomness,
|
|
TP_PROTO(dev_t dev, int input_bits),
|
|
|
|
TP_ARGS(dev, input_bits),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( int, input_bits )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = dev;
|
|
__entry->input_bits = input_bits;
|
|
),
|
|
|
|
TP_printk("dev %d,%d input_pool_bits %d", MAJOR(__entry->dev),
|
|
MINOR(__entry->dev), __entry->input_bits)
|
|
);
|
|
|
|
TRACE_EVENT(xfer_secondary_pool,
|
|
TP_PROTO(const char *pool_name, int xfer_bits, int request_bits,
|
|
int pool_entropy, int input_entropy),
|
|
|
|
TP_ARGS(pool_name, xfer_bits, request_bits, pool_entropy,
|
|
input_entropy),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, xfer_bits )
|
|
__field( int, request_bits )
|
|
__field( int, pool_entropy )
|
|
__field( int, input_entropy )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->xfer_bits = xfer_bits;
|
|
__entry->request_bits = request_bits;
|
|
__entry->pool_entropy = pool_entropy;
|
|
__entry->input_entropy = input_entropy;
|
|
),
|
|
|
|
TP_printk("pool %s xfer_bits %d request_bits %d pool_entropy %d "
|
|
"input_entropy %d", __entry->pool_name, __entry->xfer_bits,
|
|
__entry->request_bits, __entry->pool_entropy,
|
|
__entry->input_entropy)
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(random__get_random_bytes,
|
|
TP_PROTO(int nbytes, unsigned long IP),
|
|
|
|
TP_ARGS(nbytes, IP),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, nbytes )
|
|
__field(unsigned long, IP )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->nbytes = nbytes;
|
|
__entry->IP = IP;
|
|
),
|
|
|
|
TP_printk("nbytes %d caller %pS", __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),
|
|
|
|
TP_ARGS(pool_name, nbytes, entropy_count, IP),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( const char *, pool_name )
|
|
__field( int, nbytes )
|
|
__field( int, entropy_count )
|
|
__field(unsigned long, IP )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pool_name = pool_name;
|
|
__entry->nbytes = nbytes;
|
|
__entry->entropy_count = entropy_count;
|
|
__entry->IP = IP;
|
|
),
|
|
|
|
TP_printk("%s pool: nbytes %d entropy_count %d caller %pS",
|
|
__entry->pool_name, __entry->nbytes, __entry->entropy_count,
|
|
(void *)__entry->IP)
|
|
);
|
|
|
|
|
|
DEFINE_EVENT(random__extract_entropy, extract_entropy,
|
|
TP_PROTO(const char *pool_name, int nbytes, int entropy_count,
|
|
unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, nbytes, entropy_count, IP)
|
|
);
|
|
|
|
DEFINE_EVENT(random__extract_entropy, extract_entropy_user,
|
|
TP_PROTO(const char *pool_name, int nbytes, int entropy_count,
|
|
unsigned long IP),
|
|
|
|
TP_ARGS(pool_name, nbytes, entropy_count, IP)
|
|
);
|
|
|
|
TRACE_EVENT(random_read,
|
|
TP_PROTO(int got_bits, int need_bits, int pool_left, int input_left),
|
|
|
|
TP_ARGS(got_bits, need_bits, pool_left, input_left),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, got_bits )
|
|
__field( int, need_bits )
|
|
__field( int, pool_left )
|
|
__field( int, input_left )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->got_bits = got_bits;
|
|
__entry->need_bits = need_bits;
|
|
__entry->pool_left = pool_left;
|
|
__entry->input_left = input_left;
|
|
),
|
|
|
|
TP_printk("got_bits %d still_needed_bits %d "
|
|
"blocking_pool_entropy_left %d input_entropy_left %d",
|
|
__entry->got_bits, __entry->got_bits, __entry->pool_left,
|
|
__entry->input_left)
|
|
);
|
|
|
|
TRACE_EVENT(urandom_read,
|
|
TP_PROTO(int got_bits, int pool_left, int input_left),
|
|
|
|
TP_ARGS(got_bits, pool_left, input_left),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, got_bits )
|
|
__field( int, pool_left )
|
|
__field( int, input_left )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->got_bits = got_bits;
|
|
__entry->pool_left = pool_left;
|
|
__entry->input_left = input_left;
|
|
),
|
|
|
|
TP_printk("got_bits %d nonblocking_pool_entropy_left %d "
|
|
"input_entropy_left %d", __entry->got_bits,
|
|
__entry->pool_left, __entry->input_left)
|
|
);
|
|
|
|
#endif /* _TRACE_RANDOM_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|