1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Scatterlist Cryptographic API.
4 *
5 * Procfs information.
6 *
7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
8 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
9 */
10
11 #include <linux/atomic.h>
12 #include <linux/init.h>
13 #include <linux/crypto.h>
14 #include <linux/module.h> /* for module_name() */
15 #include <linux/rwsem.h>
16 #include <linux/proc_fs.h>
17 #include <linux/seq_file.h>
18 #include "internal.h"
19
c_start(struct seq_file * m,loff_t * pos)20 static void *c_start(struct seq_file *m, loff_t *pos)
21 {
22 down_read(&crypto_alg_sem);
23 return seq_list_start(&crypto_alg_list, *pos);
24 }
25
c_next(struct seq_file * m,void * p,loff_t * pos)26 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
27 {
28 return seq_list_next(p, &crypto_alg_list, pos);
29 }
30
c_stop(struct seq_file * m,void * p)31 static void c_stop(struct seq_file *m, void *p)
32 {
33 up_read(&crypto_alg_sem);
34 }
35
c_show(struct seq_file * m,void * p)36 static int c_show(struct seq_file *m, void *p)
37 {
38 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
39
40 seq_printf(m, "name : %s\n", alg->cra_name);
41 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
42 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
43 seq_printf(m, "priority : %d\n", alg->cra_priority);
44 seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
45 seq_printf(m, "selftest : %s\n",
46 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
47 "passed" : "unknown");
48 seq_printf(m, "internal : %s\n",
49 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
50 "yes" : "no");
51
52 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
53 seq_printf(m, "type : larval\n");
54 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
55 goto out;
56 }
57
58 if (alg->cra_type && alg->cra_type->show) {
59 alg->cra_type->show(m, alg);
60 goto out;
61 }
62
63 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
64 case CRYPTO_ALG_TYPE_CIPHER:
65 seq_printf(m, "type : cipher\n");
66 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
67 seq_printf(m, "min keysize : %u\n",
68 alg->cra_cipher.cia_min_keysize);
69 seq_printf(m, "max keysize : %u\n",
70 alg->cra_cipher.cia_max_keysize);
71 break;
72 case CRYPTO_ALG_TYPE_COMPRESS:
73 seq_printf(m, "type : compression\n");
74 break;
75 default:
76 seq_printf(m, "type : unknown\n");
77 break;
78 }
79
80 out:
81 seq_putc(m, '\n');
82 return 0;
83 }
84
85 static const struct seq_operations crypto_seq_ops = {
86 .start = c_start,
87 .next = c_next,
88 .stop = c_stop,
89 .show = c_show
90 };
91
crypto_init_proc(void)92 void __init crypto_init_proc(void)
93 {
94 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
95 }
96
crypto_exit_proc(void)97 void __exit crypto_exit_proc(void)
98 {
99 remove_proc_entry("crypto", NULL);
100 }
101
