LXR linux/crypto/proc.c

   1/*
   2 * Scatterlist Cryptographic API.
   3 *
   4 * Procfs information.
   5 *
   6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
   8 *
   9 * This program is free software; you can redistribute it and/or modify it
  10 * under the terms of the GNU General Public License as published by the Free
  11 * Software Foundation; either version 2 of the License, or (at your option) 
  12 * any later version.
  13 *
  14 */
  15
  16#include <asm/atomic.h>
  17#include <linux/init.h>
  18#include <linux/crypto.h>
  19#include <linux/rwsem.h>
  20#include <linux/proc_fs.h>
  21#include <linux/seq_file.h>
  22#include "internal.h"
  23
  24static void *c_start(struct seq_file *m, loff_t *pos)
  25{
  26        down_read(&crypto_alg_sem);
  27        return seq_list_start(&crypto_alg_list, *pos);
  28}
  29
  30static void *c_next(struct seq_file *m, void *p, loff_t *pos)
  31{
  32        return seq_list_next(p, &crypto_alg_list, pos);
  33}
  34
  35static void c_stop(struct seq_file *m, void *p)
  36{
  37        up_read(&crypto_alg_sem);
  38}
  39
  40static int c_show(struct seq_file *m, void *p)
  41{
  42        struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
  43        
  44        seq_printf(m, "name         : %s\n", alg->cra_name);
  45        seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
  46        seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
  47        seq_printf(m, "priority     : %d\n", alg->cra_priority);
  48        seq_printf(m, "refcnt       : %d\n", atomic_read(&alg->cra_refcnt));
  49        
  50        switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
  51        case CRYPTO_ALG_TYPE_CIPHER:
  52                seq_printf(m, "type         : cipher\n");
  53                seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
  54                seq_printf(m, "min keysize  : %u\n",
  55                                        alg->cra_cipher.cia_min_keysize);
  56                seq_printf(m, "max keysize  : %u\n",
  57                                        alg->cra_cipher.cia_max_keysize);
  58                break;
  59                
  60        case CRYPTO_ALG_TYPE_DIGEST:
  61                seq_printf(m, "type         : digest\n");
  62                seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
  63                seq_printf(m, "digestsize   : %u\n",
  64                           alg->cra_digest.dia_digestsize);
  65                break;
  66        case CRYPTO_ALG_TYPE_COMPRESS:
  67                seq_printf(m, "type         : compression\n");
  68                break;
  69        default:
  70                if (alg->cra_type && alg->cra_type->show)
  71                        alg->cra_type->show(m, alg);
  72                else
  73                        seq_printf(m, "type         : unknown\n");
  74                break;
  75        }
  76
  77        seq_putc(m, '\n');
  78        return 0;
  79}
  80
  81static const struct seq_operations crypto_seq_ops = {
  82        .start          = c_start,
  83        .next           = c_next,
  84        .stop           = c_stop,
  85        .show           = c_show
  86};
  87
  88static int crypto_info_open(struct inode *inode, struct file *file)
  89{
  90        return seq_open(file, &crypto_seq_ops);
  91}
  92        
  93static const struct file_operations proc_crypto_ops = {
  94        .open           = crypto_info_open,
  95        .read           = seq_read,
  96        .llseek         = seq_lseek,
  97        .release        = seq_release
  98};
  99
 100void __init crypto_init_proc(void)
 101{
 102        proc_create("crypto", 0, NULL, &proc_crypto_ops);
 103}
 104
 105void __exit crypto_exit_proc(void)
 106{
 107        remove_proc_entry("crypto", NULL);
 108}
 109