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/*
* Scatterlist Cryptographic API.
*
* Procfs information.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <asm/atomic.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/rwsem.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "internal.h"
static void *c_start(struct seq_file *m, loff_t *pos)
{
struct list_head *v;
loff_t n = *pos;
down_read(&crypto_alg_sem);
list_for_each(v, &crypto_alg_list)
if (!n--)
return list_entry(v, struct crypto_alg, cra_list);
return NULL;
}
static void *c_next(struct seq_file *m, void *p, loff_t *pos)
{
struct list_head *v = p;
(*pos)++;
v = v->next;
return (v == &crypto_alg_list) ?
NULL : list_entry(v, struct crypto_alg, cra_list);
}
static void c_stop(struct seq_file *m, void *p)
{
up_read(&crypto_alg_sem);
}
static int c_show(struct seq_file *m, void *p)
{
struct crypto_alg *alg = (struct crypto_alg *)p;
seq_printf(m, "name : %s\n", alg->cra_name);
seq_printf(m, "driver : %s\n", alg->cra_driver_name);
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
seq_printf(m, "priority : %d\n", alg->cra_priority);
seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
case CRYPTO_ALG_TYPE_CIPHER:
seq_printf(m, "type : cipher\n");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "min keysize : %u\n",
alg->cra_cipher.cia_min_keysize);
seq_printf(m, "max keysize : %u\n",
alg->cra_cipher.cia_max_keysize);
break;
case CRYPTO_ALG_TYPE_DIGEST:
seq_printf(m, "type : digest\n");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "digestsize : %u\n",
alg->cra_digest.dia_digestsize);
break;
case CRYPTO_ALG_TYPE_COMPRESS:
seq_printf(m, "type : compression\n");
break;
default:
seq_printf(m, "type : unknown\n");
break;
}
seq_putc(m, '\n');
return 0;
}
static struct seq_operations crypto_seq_ops = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = c_show
};
static int crypto_info_open(struct inode *inode, struct file *file)
{
return seq_open(file, &crypto_seq_ops);
}
static struct file_operations proc_crypto_ops = {
.open = crypto_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release
};
void __init crypto_init_proc(void)
{
struct proc_dir_entry *proc;
proc = create_proc_entry("crypto", 0, NULL);
if (proc)
proc->proc_fops = &proc_crypto_ops;
}
void __exit crypto_exit_proc(void)
{
remove_proc_entry("crypto", NULL);
}
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