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 #include <sys/mdb_modapi.h>
28 #include <mdb/mdb_ctf.h>
29 #include <sys/random.h>
30
31 /*
32 * rnd_stats dcmd - Print out the global rnd_stats structure, nicely formatted.
33 */
34 /*ARGSUSED*/
35 static int
rnd_get_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)36 rnd_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
37 {
38 rnd_stats_t rnd_stats, rnd_stats_cpu;
39 uint32_t random_max_ncpus;
40 size_t rndmag_t_size;
41 ulong_t rndmag_t_offset;
42 uintptr_t rndmag;
43 mdb_ctf_id_t rndmag_id;
44 int i;
45
46 if ((flags & DCMD_ADDRSPEC) || argc != 0)
47 return (DCMD_USAGE);
48
49 if (mdb_readvar(&rnd_stats, "rnd_stats") == -1) {
50 mdb_warn("failed to read rnd_stats structure");
51 return (DCMD_ERR);
52 }
53
54 if ((mdb_ctf_lookup_by_name("rndmag_t", &rndmag_id) != 0) ||
55 (mdb_ctf_offsetof(rndmag_id, "rm_stats", &rndmag_t_offset) != 0) ||
56 (mdb_readvar(&random_max_ncpus, "random_max_ncpus") == -1) ||
57 (mdb_readvar(&rndmag, "rndmag") == -1) ||
58 ((rndmag_t_size = mdb_ctf_type_size(rndmag_id)) == 0)) {
59 /* Can't find per-cpu stats. Don't add them in. */
60 random_max_ncpus = 0;
61 }
62
63 rndmag_t_offset /= 8;
64
65 /*
66 * Read and aggregate per-cpu stats if we have them.
67 */
68 for (i = 0; i < random_max_ncpus; i++) {
69 mdb_vread(&rnd_stats_cpu, sizeof (rnd_stats_cpu),
70 rndmag + rndmag_t_offset + i * rndmag_t_size);
71
72 rnd_stats.rs_rndOut += rnd_stats_cpu.rs_rndOut;
73 rnd_stats.rs_rndcOut += rnd_stats_cpu.rs_rndcOut;
74 rnd_stats.rs_urndOut += rnd_stats_cpu.rs_urndOut;
75 }
76
77 mdb_printf("Random number device statistics:\n");
78
79 mdb_printf("%8llu bytes generated for /dev/random\n",
80 rnd_stats.rs_rndOut);
81 mdb_printf("%8llu bytes read from /dev/random cache\n",
82 rnd_stats.rs_rndcOut);
83 mdb_printf("%8llu bytes generated for /dev/urandom\n",
84 rnd_stats.rs_urndOut);
85
86 return (DCMD_OK);
87 }
88
89 /*
90 * swrand_stats dcmd - Print out the global swrand_stats structure,
91 * nicely formatted.
92 */
93 /*ARGSUSED*/
94 static int
swrand_get_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)95 swrand_get_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
96 {
97 swrand_stats_t swrand_stats;
98
99 if ((flags & DCMD_ADDRSPEC) || argc != 0)
100 return (DCMD_USAGE);
101
102 if (mdb_readvar(&swrand_stats, "swrand_stats") == -1) {
103 mdb_warn("failed to read swrand_stats structure");
104 return (DCMD_ERR);
105 }
106
107 mdb_printf("Software-based Random number generator statistics:\n");
108
109 mdb_printf("%8u bits of entropy estimate\n", swrand_stats.ss_entEst);
110 mdb_printf("%8llu bits of entropy added to the pool\n",
111 swrand_stats.ss_entIn);
112 mdb_printf("%8llu bits of entropy extracted from the pool\n",
113 swrand_stats.ss_entOut);
114 mdb_printf("%8llu bytes added to the random pool\n",
115 swrand_stats.ss_bytesIn);
116 mdb_printf("%8llu bytes extracted from the random pool\n",
117 swrand_stats.ss_bytesOut);
118
119 return (DCMD_OK);
120 }
121
122 static const mdb_dcmd_t dcmds[] = {
123 { "rnd_stats",
124 NULL,
125 "print random number device statistics",
126 rnd_get_stats },
127 { "swrand_stats",
128 NULL,
129 "print kernel random number provider statistics",
130 swrand_get_stats },
131 { NULL }
132 };
133
134 static const mdb_modinfo_t modinfo = {
135 MDB_API_VERSION, dcmds, NULL
136 };
137
138 const mdb_modinfo_t *
_mdb_init(void)139 _mdb_init(void)
140 {
141 return (&modinfo);
142 }
143