proc.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Scatterlist Cryptographic API.
  4 *
  5 * Procfs information.
  6 *
  7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  8 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
  9 */
 10
 11#include <linux/atomic.h>
 12#include <linux/init.h>
 13#include <linux/crypto.h>
 14#include <linux/fips.h>
 15#include <linux/module.h>	/* for module_name() */
 16#include <linux/rwsem.h>
 17#include <linux/proc_fs.h>
 18#include <linux/seq_file.h>
 19#include "internal.h"
 20
 21static void *c_start(struct seq_file *m, loff_t *pos)
 22{
 23	down_read(&crypto_alg_sem);
 24	return seq_list_start(&crypto_alg_list, *pos);
 25}
 26
 27static void *c_next(struct seq_file *m, void *p, loff_t *pos)
 28{
 29	return seq_list_next(p, &crypto_alg_list, pos);
 30}
 31
 32static void c_stop(struct seq_file *m, void *p)
 33{
 34	up_read(&crypto_alg_sem);
 35}
 36
 37static int c_show(struct seq_file *m, void *p)
 38{
 39	struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
 40
 41	seq_printf(m, "name         : %s\n", alg->cra_name);
 42	seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
 43	seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
 44	seq_printf(m, "priority     : %d\n", alg->cra_priority);
 45	seq_printf(m, "refcnt       : %u\n", refcount_read(&alg->cra_refcnt));
 46	seq_printf(m, "selftest     : %s\n",
 47		   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
 48		   "passed" : "unknown");
 49	seq_printf(m, "internal     : %s\n",
 50		   str_yes_no(alg->cra_flags & CRYPTO_ALG_INTERNAL));
 51	if (fips_enabled)
 52		seq_printf(m, "fips         : %s\n",
 53			str_no_yes(alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL));
 54
 55	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
 56		seq_printf(m, "type         : larval\n");
 57		seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
 58		goto out;
 59	}
 60
 61	if (alg->cra_type && alg->cra_type->show) {
 62		alg->cra_type->show(m, alg);
 63		goto out;
 64	}
 65
 66	switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
 67	case CRYPTO_ALG_TYPE_CIPHER:
 68		seq_printf(m, "type         : cipher\n");
 69		seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
 70		seq_printf(m, "min keysize  : %u\n",
 71					alg->cra_cipher.cia_min_keysize);
 72		seq_printf(m, "max keysize  : %u\n",
 73					alg->cra_cipher.cia_max_keysize);
 74		break;
 75	default:
 76		seq_printf(m, "type         : unknown\n");
 77		break;
 78	}
 79
 80out:
 81	seq_putc(m, '\n');
 82	return 0;
 83}
 84
 85static const struct seq_operations crypto_seq_ops = {
 86	.start		= c_start,
 87	.next		= c_next,
 88	.stop		= c_stop,
 89	.show		= c_show
 90};
 91
 92void __init crypto_init_proc(void)
 93{
 94	proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
 95}
 96
 97void __exit crypto_exit_proc(void)
 98{
 99	remove_proc_entry("crypto", NULL);
100}