blob: 2cc10c96d7530f486f90afb2336909ed44b61490
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 | |
25 | static 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 | |
31 | static 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 | |
36 | static void c_stop(struct seq_file *m, void *p) |
37 | { |
38 | up_read(&crypto_alg_sem); |
39 | } |
40 | |
41 | static 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 | |
85 | out: |
86 | seq_putc(m, '\n'); |
87 | return 0; |
88 | } |
89 | |
90 | static 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 | |
97 | static int crypto_info_open(struct inode *inode, struct file *file) |
98 | { |
99 | return seq_open(file, &crypto_seq_ops); |
100 | } |
101 | |
102 | static 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 | |
109 | void __init crypto_init_proc(void) |
110 | { |
111 | proc_create("crypto", 0, NULL, &proc_crypto_ops); |
112 | } |
113 | |
114 | void __exit crypto_exit_proc(void) |
115 | { |
116 | remove_proc_entry("crypto", NULL); |
117 | } |
118 |