1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/mdb_modapi.h>
30 #include <mdb/mdb_ctf.h>
31 #include <sys/random.h>
32
33 /*
34 * rnd_stats dcmd - Print out the global rnd_stats structure, nicely formatted.
35 */
36 /*ARGSUSED*/
37 static int
rnd_get_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)38 rnd_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
39 {
40 rnd_stats_t rnd_stats, rnd_stats_cpu;
41 uint32_t random_max_ncpus;
42 size_t rndmag_t_size;
43 ulong_t rndmag_t_offset;
44 uintptr_t rndmag;
45 mdb_ctf_id_t rndmag_id;
46 int i;
47
48 if ((flags & DCMD_ADDRSPEC) || argc != 0)
49 return (DCMD_USAGE);
50
51 if (mdb_readvar(&rnd_stats, "rnd_stats") == -1) {
52 mdb_warn("failed to read rnd_stats structure");
53 return (DCMD_ERR);
54 }
55
56 if ((mdb_ctf_lookup_by_name("rndmag_t", &rndmag_id) != 0) ||
57 (mdb_ctf_offsetof(rndmag_id, "rm_stats", &rndmag_t_offset) != 0) ||
58 (mdb_readvar(&random_max_ncpus, "random_max_ncpus") == -1) ||
59 (mdb_readvar(&rndmag, "rndmag") == -1) ||
60 ((rndmag_t_size = mdb_ctf_type_size(rndmag_id)) == 0)) {
61 /* Can't find per-cpu stats. Don't add them in. */
62 random_max_ncpus = 0;
63 }
64
65 rndmag_t_offset /= 8;
66
67 /*
68 * Read and aggregate per-cpu stats if we have them.
69 */
70 for (i = 0; i < random_max_ncpus; i++) {
71 mdb_vread(&rnd_stats_cpu, sizeof (rnd_stats_cpu),
72 rndmag + rndmag_t_offset + i * rndmag_t_size);
73
74 rnd_stats.rs_rndOut += rnd_stats_cpu.rs_rndOut;
75 rnd_stats.rs_rndcOut += rnd_stats_cpu.rs_rndcOut;
76 rnd_stats.rs_urndOut += rnd_stats_cpu.rs_urndOut;
77 }
78
79 mdb_printf("Random number device statistics:\n");
80
81 mdb_printf("%8llu bytes generated for /dev/random\n",
82 rnd_stats.rs_rndOut);
83 mdb_printf("%8llu bytes read from /dev/random cache\n",
84 rnd_stats.rs_rndcOut);
85 mdb_printf("%8llu bytes generated for /dev/urandom\n",
86 rnd_stats.rs_urndOut);
87
88 return (DCMD_OK);
89 }
90
91 /*
92 * swrand_stats dcmd - Print out the global swrand_stats structure,
93 * nicely formatted.
94 */
95 /*ARGSUSED*/
96 static int
swrand_get_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)97 swrand_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
98 {
99 swrand_stats_t swrand_stats;
100
101 if ((flags & DCMD_ADDRSPEC) || argc != 0)
102 return (DCMD_USAGE);
103
104 if (mdb_readvar(&swrand_stats, "swrand_stats") == -1) {
105 mdb_warn("failed to read swrand_stats structure");
106 return (DCMD_ERR);
107 }
108
109 mdb_printf("Software-based Random number generator statistics:\n");
110
111 mdb_printf("%8u bits of entropy estimate\n", swrand_stats.ss_entEst);
112 mdb_printf("%8llu bits of entropy added to the pool\n",
113 swrand_stats.ss_entIn);
114 mdb_printf("%8llu bits of entropy extracted from the pool\n",
115 swrand_stats.ss_entOut);
116 mdb_printf("%8llu bytes added to the random pool\n",
117 swrand_stats.ss_bytesIn);
118 mdb_printf("%8llu bytes extracted from the random pool\n",
119 swrand_stats.ss_bytesOut);
120
121 return (DCMD_OK);
122 }
123
124 static const mdb_dcmd_t dcmds[] = {
125 { "rnd_stats",
126 NULL,
127 "print random number device statistics",
128 rnd_get_stats },
129 { "swrand_stats",
130 NULL,
131 "print kernel random number provider statistics",
132 swrand_get_stats },
133 { NULL }
134 };
135
136 static const mdb_modinfo_t modinfo = {
137 MDB_API_VERSION, dcmds, NULL
138 };
139
140 const mdb_modinfo_t *
_mdb_init(void)141 _mdb_init(void)
142 {
143 return (&modinfo);
144 }
145