root/crypto/proc.c

Revision 1, 2.7 kB (checked in by dkaplan1, 7 years ago)

Initial import

Line 
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 }
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