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
25static 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
31static 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
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{
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       : %d\n", atomic_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
85out:
86	seq_putc(m, '\n');
87	return 0;
88}
89
90static 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
97static int crypto_info_open(struct inode *inode, struct file *file)
98{
99	return seq_open(file, &crypto_seq_ops);
100}
101
102static const struct file_operations proc_crypto_ops = {
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{
111	proc_create("crypto", 0, NULL, &proc_crypto_ops);
112}
113
114void __exit crypto_exit_proc(void)
115{
116	remove_proc_entry("crypto", NULL);
117}
118