proc.c

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/*
 * Scatterlist Cryptographic API.
 *
 * Procfs information.
 *
 * Copyright (c) 2002 James Morris <[email protected]>
 *
 * 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 <linux/init.h>
//#include <linux/crypto.h>
#include "rtl_crypto.h"
#include <linux/rwsem.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "internal.h"

extern struct list_head crypto_alg_list;
extern struct rw_semaphore crypto_alg_sem;

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, "module       : %s\n",
           (alg->cra_module ?
            alg->cra_module->name :
            "kernel"));

    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;
}