Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/crypto/proc.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 2721 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* |
2 | * Scatterlist Cryptographic API. |
3 | * |
4 | * Procfs information. |
5 | * |
6 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU General Public License as published by the Free |
10 | * Software Foundation; either version 2 of the License, or (at your option) |
11 | * any later version. |
12 | * |
13 | */ |
14 | #include <linux/init.h> |
15 | #include <linux/crypto.h> |
16 | #include <linux/rwsem.h> |
17 | #include <linux/proc_fs.h> |
18 | #include <linux/seq_file.h> |
19 | #include "internal.h" |
20 | |
21 | extern struct list_head crypto_alg_list; |
22 | extern struct rw_semaphore crypto_alg_sem; |
23 | |
24 | static void *c_start(struct seq_file *m, loff_t *pos) |
25 | { |
26 | struct list_head *v; |
27 | loff_t n = *pos; |
28 | |
29 | down_read(&crypto_alg_sem); |
30 | list_for_each(v, &crypto_alg_list) |
31 | if (!n--) |
32 | return list_entry(v, struct crypto_alg, cra_list); |
33 | return NULL; |
34 | } |
35 | |
36 | static void *c_next(struct seq_file *m, void *p, loff_t *pos) |
37 | { |
38 | struct list_head *v = p; |
39 | |
40 | (*pos)++; |
41 | v = v->next; |
42 | return (v == &crypto_alg_list) ? |
43 | NULL : list_entry(v, struct crypto_alg, cra_list); |
44 | } |
45 | |
46 | static void c_stop(struct seq_file *m, void *p) |
47 | { |
48 | up_read(&crypto_alg_sem); |
49 | } |
50 | |
51 | static int c_show(struct seq_file *m, void *p) |
52 | { |
53 | struct crypto_alg *alg = (struct crypto_alg *)p; |
54 | |
55 | seq_printf(m, "name : %s\n", alg->cra_name); |
56 | seq_printf(m, "module : %s\n", module_name(alg->cra_module)); |
57 | |
58 | switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { |
59 | case CRYPTO_ALG_TYPE_CIPHER: |
60 | seq_printf(m, "type : cipher\n"); |
61 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
62 | seq_printf(m, "min keysize : %u\n", |
63 | alg->cra_cipher.cia_min_keysize); |
64 | seq_printf(m, "max keysize : %u\n", |
65 | alg->cra_cipher.cia_max_keysize); |
66 | break; |
67 | |
68 | case CRYPTO_ALG_TYPE_DIGEST: |
69 | seq_printf(m, "type : digest\n"); |
70 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
71 | seq_printf(m, "digestsize : %u\n", |
72 | alg->cra_digest.dia_digestsize); |
73 | break; |
74 | case CRYPTO_ALG_TYPE_COMPRESS: |
75 | seq_printf(m, "type : compression\n"); |
76 | break; |
77 | default: |
78 | seq_printf(m, "type : unknown\n"); |
79 | break; |
80 | } |
81 | |
82 | seq_putc(m, '\n'); |
83 | return 0; |
84 | } |
85 | |
86 | static struct seq_operations crypto_seq_ops = { |
87 | .start = c_start, |
88 | .next = c_next, |
89 | .stop = c_stop, |
90 | .show = c_show |
91 | }; |
92 | |
93 | static int crypto_info_open(struct inode *inode, struct file *file) |
94 | { |
95 | return seq_open(file, &crypto_seq_ops); |
96 | } |
97 | |
98 | static struct file_operations proc_crypto_ops = { |
99 | .open = crypto_info_open, |
100 | .read = seq_read, |
101 | .llseek = seq_lseek, |
102 | .release = seq_release |
103 | }; |
104 | |
105 | void __init crypto_init_proc(void) |
106 | { |
107 | struct proc_dir_entry *proc; |
108 | |
109 | proc = create_proc_entry("crypto", 0, NULL); |
110 | if (proc) |
111 | proc->proc_fops = &proc_crypto_ops; |
112 | } |