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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 | } |