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 <linux/atomic.h>
  17#include <linux/init.h>
  18#include <linux/crypto.h>
  19#include <linux/module.h>       /* for module_name() */
  20#include <linux/rwsem.h>
  21#include <linux/proc_fs.h>
  22#include <linux/seq_file.h>
  23#include "internal.h"
  24
  25static void *c_start(struct seq_file *m, loff_t *pos)
  26{
  27        down_read(&crypto_alg_sem);
  28        return seq_list_start(&crypto_alg_list, *pos);
  29}
  30
  31static void *c_next(struct seq_file *m, void *p, loff_t *pos)
  32{
  33        return seq_list_next(p, &crypto_alg_list, pos);
  34}
  35
  36static void c_stop(struct seq_file *m, void *p)
  37{
  38        up_read(&crypto_alg_sem);
  39}
  40
  41static int c_show(struct seq_file *m, void *p)
  42{
  43        struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
  44        
  45        seq_printf(m, "name         : %s\n", alg->cra_name);
  46        seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
  47        seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
  48        seq_printf(m, "priority     : %d\n", alg->cra_priority);
  49        seq_printf(m, "refcnt       : %d\n", atomic_read(&alg->cra_refcnt));
  50        seq_printf(m, "selftest     : %s\n",
  51                   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
  52                   "passed" : "unknown");
  53        seq_printf(m, "internal     : %s\n",
  54                   (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
  55                   "yes" : "no");
  56
  57        if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
  58                seq_printf(m, "type         : larval\n");
  59                seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
  60                goto out;
  61        }
  62
  63        if (alg->cra_type && alg->cra_type->show) {
  64                alg->cra_type->show(m, alg);
  65                goto out;
  66        }
  67        
  68        switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
  69        case CRYPTO_ALG_TYPE_CIPHER:
  70                seq_printf(m, "type         : cipher\n");
  71                seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
  72                seq_printf(m, "min keysize  : %u\n",
  73                                        alg->cra_cipher.cia_min_keysize);
  74                seq_printf(m, "max keysize  : %u\n",
  75                                        alg->cra_cipher.cia_max_keysize);
  76                break;
  77        case CRYPTO_ALG_TYPE_COMPRESS:
  78                seq_printf(m, "type         : compression\n");
  79                break;
  80        default:
  81                seq_printf(m, "type         : unknown\n");
  82                break;
  83        }
  84
  85out:
  86        seq_putc(m, '\n');
  87        return 0;
  88}
  89
  90static const struct seq_operations crypto_seq_ops = {
  91        .start          = c_start,
  92        .next           = c_next,
  93        .stop           = c_stop,
  94        .show           = c_show
  95};
  96
  97static int crypto_info_open(struct inode *inode, struct file *file)
  98{
  99        return seq_open(file, &crypto_seq_ops);
 100}
 101        
 102static const struct file_operations proc_crypto_ops = {
 103        .open           = crypto_info_open,
 104        .read           = seq_read,
 105        .llseek         = seq_lseek,
 106        .release        = seq_release
 107};
 108
 109void __init crypto_init_proc(void)
 110{
 111        proc_create("crypto", 0, NULL, &proc_crypto_ops);
 112}
 113
 114void __exit crypto_exit_proc(void)
 115{
 116        remove_proc_entry("crypto", NULL);
 117}
 118