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/crypto/proc.c

https://bitbucket.org/evzijst/gittest
C | 112 lines | 83 code | 16 blank | 13 comment | 4 complexity | e626e53966a5ac69072417e6ad44d9be MD5 | raw file
  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
 21extern struct list_head crypto_alg_list;
 22extern struct rw_semaphore crypto_alg_sem;
 23
 24static 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
 36static 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
 46static void c_stop(struct seq_file *m, void *p)
 47{
 48	up_read(&crypto_alg_sem);
 49}
 50
 51static 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
 86static struct seq_operations crypto_seq_ops = {
 87	.start		= c_start,
 88	.next		= c_next,
 89	.stop		= c_stop,
 90	.show		= c_show
 91};
 92
 93static int crypto_info_open(struct inode *inode, struct file *file)
 94{
 95	return seq_open(file, &crypto_seq_ops);
 96}
 97        
 98static 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
105void __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}