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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Scatterlist Cryptographic API.
3 *
4 * Procfs information.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
Herbert Xu5cb14542005-11-05 16:58:14 +11007 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
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 */
Herbert Xu6521f302006-08-06 20:28:44 +100015
Arun Sharma600634972011-07-26 16:09:06 -070016#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/init.h>
18#include <linux/crypto.h>
Paul Gortmaker4bb33cc2011-05-27 14:41:48 -040019#include <linux/module.h> /* for module_name() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/rwsem.h>
21#include <linux/proc_fs.h>
22#include <linux/seq_file.h>
23#include "internal.h"
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025static void *c_start(struct seq_file *m, loff_t *pos)
26{
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 down_read(&crypto_alg_sem);
Pavel Emelianov13d31892007-07-15 23:39:53 -070028 return seq_list_start(&crypto_alg_list, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070029}
30
31static void *c_next(struct seq_file *m, void *p, loff_t *pos)
32{
Pavel Emelianov13d31892007-07-15 23:39:53 -070033 return seq_list_next(p, &crypto_alg_list, pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070034}
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{
Pavel Emelianov13d31892007-07-15 23:39:53 -070043 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 seq_printf(m, "name : %s\n", alg->cra_name);
Herbert Xu5cb14542005-11-05 16:58:14 +110046 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
Herbert Xu5cb14542005-11-05 16:58:14 +110048 seq_printf(m, "priority : %d\n", alg->cra_priority);
Herbert Xu6521f302006-08-06 20:28:44 +100049 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
Herbert Xu73d38642008-08-03 21:15:23 +080050 seq_printf(m, "selftest : %s\n",
51 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
52 "passed" : "unknown");
Stephan Muellerb0cda2b2015-03-30 21:57:42 +020053 seq_printf(m, "internal : %s\n",
54 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
55 "yes" : "no");
Herbert Xu67cd0802008-11-06 14:39:16 +080056
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Herbert Xua7581a02008-08-04 14:22:29 +080068 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 case CRYPTO_ALG_TYPE_COMPRESS:
78 seq_printf(m, "type : compression\n");
79 break;
80 default:
Herbert Xu67cd0802008-11-06 14:39:16 +080081 seq_printf(m, "type : unknown\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 break;
83 }
84
Herbert Xu67cd0802008-11-06 14:39:16 +080085out:
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 seq_putc(m, '\n');
87 return 0;
88}
89
Jan Engelhardt48c89492008-03-13 19:37:45 +080090static const struct seq_operations crypto_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 .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
Arjan van de Ven2b8693c2007-02-12 00:55:32 -0800102static const struct file_operations proc_crypto_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 .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{
Alexey Dobriyan607424d2008-03-05 19:27:51 +0800111 proc_create("crypto", 0, NULL, &proc_crypto_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112}
Herbert Xucce9e062006-08-21 21:08:13 +1000113
114void __exit crypto_exit_proc(void)
115{
116 remove_proc_entry("crypto", NULL);
117}