Commit | Line | Data |
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1da177e4 LT |
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 | } |