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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2019 Joyent, Inc.
*/
#include <sys/mdb_modapi.h>
#include <mdb/mdb_ctf.h>
#include <sys/random.h>
/*
* rnd_stats dcmd - Print out the global rnd_stats structure, nicely formatted.
*/
/*ARGSUSED*/
static int
rnd_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
rnd_stats_t rnd_stats, rnd_stats_cpu;
uint32_t random_max_ncpus;
size_t rndmag_pad_t_size;
ulong_t rndmag_t_offset;
uintptr_t rndmag;
int i;
if ((flags & DCMD_ADDRSPEC) || argc != 0)
return (DCMD_USAGE);
if (mdb_readvar(&rnd_stats, "rnd_stats") == -1) {
mdb_warn("failed to read rnd_stats structure");
return (DCMD_ERR);
}
if (((rndmag_t_offset = mdb_ctf_offsetof_by_name("rndmag_t", "rm_stats")) == -1) ||
(mdb_readvar(&random_max_ncpus, "random_max_ncpus") == -1) ||
(mdb_readvar(&rndmag, "rndmag") == -1) ||
((rndmag_pad_t_size = mdb_ctf_sizeof_by_name("rndmag_pad_t")) == -1)) {
/* Can't find per-cpu stats. Don't add them in. */
random_max_ncpus = 0;
}
/*
* Read and aggregate per-cpu stats if we have them.
*/
for (i = 0; i < random_max_ncpus; i++) {
mdb_vread(&rnd_stats_cpu, sizeof (rnd_stats_cpu),
rndmag + rndmag_t_offset + i * rndmag_pad_t_size);
rnd_stats.rs_rndOut += rnd_stats_cpu.rs_rndOut;
rnd_stats.rs_rndcOut += rnd_stats_cpu.rs_rndcOut;
rnd_stats.rs_urndOut += rnd_stats_cpu.rs_urndOut;
}
mdb_printf("Random number device statistics:\n");
mdb_printf("%8llu bytes generated for /dev/random\n",
rnd_stats.rs_rndOut);
mdb_printf("%8llu bytes read from /dev/random cache\n",
rnd_stats.rs_rndcOut);
mdb_printf("%8llu bytes generated for /dev/urandom\n",
rnd_stats.rs_urndOut);
return (DCMD_OK);
}
/*
* swrand_stats dcmd - Print out the global swrand_stats structure,
* nicely formatted.
*/
/*ARGSUSED*/
static int
swrand_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
swrand_stats_t swrand_stats;
if ((flags & DCMD_ADDRSPEC) || argc != 0)
return (DCMD_USAGE);
if (mdb_readvar(&swrand_stats, "swrand_stats") == -1) {
mdb_warn("failed to read swrand_stats structure");
return (DCMD_ERR);
}
mdb_printf("Software-based Random number generator statistics:\n");
mdb_printf("%8u bits of entropy estimate\n", swrand_stats.ss_entEst);
mdb_printf("%8llu bits of entropy added to the pool\n",
swrand_stats.ss_entIn);
mdb_printf("%8llu bits of entropy extracted from the pool\n",
swrand_stats.ss_entOut);
mdb_printf("%8llu bytes added to the random pool\n",
swrand_stats.ss_bytesIn);
mdb_printf("%8llu bytes extracted from the random pool\n",
swrand_stats.ss_bytesOut);
return (DCMD_OK);
}
static const mdb_dcmd_t dcmds[] = {
{ "rnd_stats",
NULL,
"print random number device statistics",
rnd_get_stats },
{ "swrand_stats",
NULL,
"print kernel random number provider statistics",
swrand_get_stats },
{ NULL }
};
static const mdb_modinfo_t modinfo = {
MDB_API_VERSION, dcmds, NULL
};
const mdb_modinfo_t *
_mdb_init(void)
{
return (&modinfo);
}
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