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1da177e4
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1/*
2 * Scatterlist Cryptographic API.
3 *
4 * Procfs information.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b 7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
1da177e4
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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 */
6521f302 15
60063497 16#include <linux/atomic.h>
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17#include <linux/init.h>
18#include <linux/crypto.h>
4bb33cc8 19#include <linux/module.h> /* for module_name() */
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20#include <linux/rwsem.h>
21#include <linux/proc_fs.h>
22#include <linux/seq_file.h>
23#include "internal.h"
24
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25static void *c_start(struct seq_file *m, loff_t *pos)
26{
1da177e4 27 down_read(&crypto_alg_sem);
13d31894 28 return seq_list_start(&crypto_alg_list, *pos);
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29}
30
31static void *c_next(struct seq_file *m, void *p, loff_t *pos)
32{
13d31894 33 return seq_list_next(p, &crypto_alg_list, pos);
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34}
35
36static void c_stop(struct seq_file *m, void *p)
37{
38 up_read(&crypto_alg_sem);
39}
40
41static int c_show(struct seq_file *m, void *p)
42{
13d31894 43 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
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44
45 seq_printf(m, "name : %s\n", alg->cra_name);
5cb1454b 46 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
1da177e4 47 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
5cb1454b 48 seq_printf(m, "priority : %d\n", alg->cra_priority);
6521f302 49 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
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50 seq_printf(m, "selftest : %s\n",
51 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
52 "passed" : "unknown");
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53 seq_printf(m, "internal : %s\n",
54 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
55 "yes" : "no");
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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 }
1da177e4 67
a7581a01 68 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
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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;
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77 case CRYPTO_ALG_TYPE_COMPRESS:
78 seq_printf(m, "type : compression\n");
79 break;
80 default:
67cd080c 81 seq_printf(m, "type : unknown\n");
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82 break;
83 }
84
67cd080c 85out:
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86 seq_putc(m, '\n');
87 return 0;
88}
89
48c8949e 90static const struct seq_operations crypto_seq_ops = {
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91 .start = c_start,
92 .next = c_next,
93 .stop = c_stop,
94 .show = c_show
95};
96
97static int crypto_info_open(struct inode *inode, struct file *file)
98{
99 return seq_open(file, &crypto_seq_ops);
100}
101
2b8693c0 102static const struct file_operations proc_crypto_ops = {
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103 .open = crypto_info_open,
104 .read = seq_read,
105 .llseek = seq_lseek,
106 .release = seq_release
107};
108
109void __init crypto_init_proc(void)
110{
607424d8 111 proc_create("crypto", 0, NULL, &proc_crypto_ops);
1da177e4 112}
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113
114void __exit crypto_exit_proc(void)
115{
116 remove_proc_entry("crypto", NULL);
117}