1 /*
2 * Scatterlist Cryptographic API.
3 *
4 * Procfs information.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 */
15
16 #include <linux/atomic.h>
17 #include <linux/init.h>
18 #include <linux/crypto.h>
19 #include <linux/module.h> /* for module_name() */
20 #include <linux/rwsem.h>
21 #include <linux/proc_fs.h>
22 #include <linux/seq_file.h>
23 #include "internal.h"
24
c_start(struct seq_file * m,loff_t * pos)25 static void *c_start(struct seq_file *m, loff_t *pos)
26 {
27 down_read(&crypto_alg_sem);
28 return seq_list_start(&crypto_alg_list, *pos);
29 }
30
c_next(struct seq_file * m,void * p,loff_t * pos)31 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
32 {
33 return seq_list_next(p, &crypto_alg_list, pos);
34 }
35
c_stop(struct seq_file * m,void * p)36 static void c_stop(struct seq_file *m, void *p)
37 {
38 up_read(&crypto_alg_sem);
39 }
40
c_show(struct seq_file * m,void * p)41 static int c_show(struct seq_file *m, void *p)
42 {
43 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
44
45 seq_printf(m, "name : %s\n", alg->cra_name);
46 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
47 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
48 seq_printf(m, "priority : %d\n", alg->cra_priority);
49 seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
50 seq_printf(m, "selftest : %s\n",
51 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
52 "passed" : "unknown");
53 seq_printf(m, "internal : %s\n",
54 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
55 "yes" : "no");
56
57 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
58 seq_printf(m, "type : larval\n");
59 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
60 goto out;
61 }
62
63 if (alg->cra_type && alg->cra_type->show) {
64 alg->cra_type->show(m, alg);
65 goto out;
66 }
67
68 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
69 case CRYPTO_ALG_TYPE_CIPHER:
70 seq_printf(m, "type : cipher\n");
71 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
72 seq_printf(m, "min keysize : %u\n",
73 alg->cra_cipher.cia_min_keysize);
74 seq_printf(m, "max keysize : %u\n",
75 alg->cra_cipher.cia_max_keysize);
76 break;
77 case CRYPTO_ALG_TYPE_COMPRESS:
78 seq_printf(m, "type : compression\n");
79 break;
80 default:
81 seq_printf(m, "type : unknown\n");
82 break;
83 }
84
85 out:
86 seq_putc(m, '\n');
87 return 0;
88 }
89
90 static const struct seq_operations crypto_seq_ops = {
91 .start = c_start,
92 .next = c_next,
93 .stop = c_stop,
94 .show = c_show
95 };
96
crypto_init_proc(void)97 void __init crypto_init_proc(void)
98 {
99 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
100 }
101
crypto_exit_proc(void)102 void __exit crypto_exit_proc(void)
103 {
104 remove_proc_entry("crypto", NULL);
105 }
106
