Merge branches 'core/debug', 'core/futexes', 'core/locking', 'core/rcu', 'core/signal...
[linux-2.6] / crypto / proc.c
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 <asm/atomic.h>
17 #include <linux/init.h>
18 #include <linux/crypto.h>
19 #include <linux/rwsem.h>
20 #include <linux/proc_fs.h>
21 #include <linux/seq_file.h>
22 #include <linux/sysctl.h>
23 #include "internal.h"
24
25 #ifdef CONFIG_CRYPTO_FIPS
26 static struct ctl_table crypto_sysctl_table[] = {
27         {
28                 .ctl_name       = CTL_UNNUMBERED,
29                 .procname       = "fips_enabled",
30                 .data           = &fips_enabled,
31                 .maxlen         = sizeof(int),
32                 .mode           = 0444,
33                 .proc_handler   = &proc_dointvec
34         },
35         {
36                 .ctl_name = 0,
37         },
38 };
39
40 static struct ctl_table crypto_dir_table[] = {
41         {
42                 .ctl_name       = CTL_UNNUMBERED,
43                 .procname       = "crypto",
44                 .mode           = 0555,
45                 .child          = crypto_sysctl_table
46         },
47         {
48                 .ctl_name = 0,
49         },
50 };
51
52 static struct ctl_table_header *crypto_sysctls;
53
54 static void crypto_proc_fips_init(void)
55 {
56         crypto_sysctls = register_sysctl_table(crypto_dir_table);
57 }
58
59 static void crypto_proc_fips_exit(void)
60 {
61         if (crypto_sysctls)
62                 unregister_sysctl_table(crypto_sysctls);
63 }
64 #else
65 #define crypto_proc_fips_init()
66 #define crypto_proc_fips_exit()
67 #endif
68
69 static void *c_start(struct seq_file *m, loff_t *pos)
70 {
71         down_read(&crypto_alg_sem);
72         return seq_list_start(&crypto_alg_list, *pos);
73 }
74
75 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
76 {
77         return seq_list_next(p, &crypto_alg_list, pos);
78 }
79
80 static void c_stop(struct seq_file *m, void *p)
81 {
82         up_read(&crypto_alg_sem);
83 }
84
85 static int c_show(struct seq_file *m, void *p)
86 {
87         struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
88         
89         seq_printf(m, "name         : %s\n", alg->cra_name);
90         seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
91         seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
92         seq_printf(m, "priority     : %d\n", alg->cra_priority);
93         seq_printf(m, "refcnt       : %d\n", atomic_read(&alg->cra_refcnt));
94         seq_printf(m, "selftest     : %s\n",
95                    (alg->cra_flags & CRYPTO_ALG_TESTED) ?
96                    "passed" : "unknown");
97         
98         switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
99         case CRYPTO_ALG_TYPE_CIPHER:
100                 seq_printf(m, "type         : cipher\n");
101                 seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
102                 seq_printf(m, "min keysize  : %u\n",
103                                         alg->cra_cipher.cia_min_keysize);
104                 seq_printf(m, "max keysize  : %u\n",
105                                         alg->cra_cipher.cia_max_keysize);
106                 break;
107                 
108         case CRYPTO_ALG_TYPE_DIGEST:
109                 seq_printf(m, "type         : digest\n");
110                 seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
111                 seq_printf(m, "digestsize   : %u\n",
112                            alg->cra_digest.dia_digestsize);
113                 break;
114         case CRYPTO_ALG_TYPE_COMPRESS:
115                 seq_printf(m, "type         : compression\n");
116                 break;
117         default:
118                 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
119                         seq_printf(m, "type         : larval\n");
120                         seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
121                 } else if (alg->cra_type && alg->cra_type->show)
122                         alg->cra_type->show(m, alg);
123                 else
124                         seq_printf(m, "type         : unknown\n");
125                 break;
126         }
127
128         seq_putc(m, '\n');
129         return 0;
130 }
131
132 static const struct seq_operations crypto_seq_ops = {
133         .start          = c_start,
134         .next           = c_next,
135         .stop           = c_stop,
136         .show           = c_show
137 };
138
139 static int crypto_info_open(struct inode *inode, struct file *file)
140 {
141         return seq_open(file, &crypto_seq_ops);
142 }
143         
144 static const struct file_operations proc_crypto_ops = {
145         .open           = crypto_info_open,
146         .read           = seq_read,
147         .llseek         = seq_lseek,
148         .release        = seq_release
149 };
150
151 void __init crypto_init_proc(void)
152 {
153         proc_create("crypto", 0, NULL, &proc_crypto_ops);
154         crypto_proc_fips_init();
155 }
156
157 void __exit crypto_exit_proc(void)
158 {
159         crypto_proc_fips_exit();
160         remove_proc_entry("crypto", NULL);
161 }