// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   * Scatterlist Cryptographic API.
   *
   * Procfs information.
   *
   * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>

   * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>

   */

  #include <linux/atomic.h>

  #include <linux/init.h>
  #include <linux/crypto.h>

  #include <linux/module.h>	/* for module_name() */

  #include <linux/rwsem.h>
  #include <linux/proc_fs.h>
  #include <linux/seq_file.h>
  #include "internal.h"

  static void *c_start(struct seq_file *m, loff_t *pos)
  {

  	down_read(&crypto_alg_sem);

  	return seq_list_start(&crypto_alg_list, *pos);

  }
  
  static void *c_next(struct seq_file *m, void *p, loff_t *pos)
  {

  	return seq_list_next(p, &crypto_alg_list, pos);

  }
  
  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 = list_entry(p, struct crypto_alg, cra_list);

  	seq_printf(m, "name         : %s
  ", alg->cra_name);

  	seq_printf(m, "driver       : %s
  ", alg->cra_driver_name);

  	seq_printf(m, "module       : %s
  ", module_name(alg->cra_module));

  	seq_printf(m, "priority     : %d
  ", alg->cra_priority);

  	seq_printf(m, "refcnt       : %u
  ", refcount_read(&alg->cra_refcnt));

  	seq_printf(m, "selftest     : %s
  ",
  		   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
  		   "passed" : "unknown");

  	seq_printf(m, "internal     : %s
  ",
  		   (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
  		   "yes" : "no");

  
  	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
  		seq_printf(m, "type         : larval
  ");
  		seq_printf(m, "flags        : 0x%x
  ", alg->cra_flags);
  		goto out;
  	}
  
  	if (alg->cra_type && alg->cra_type->show) {
  		alg->cra_type->show(m, alg);
  		goto out;
  	}

  	switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {

  	case CRYPTO_ALG_TYPE_CIPHER:
  		seq_printf(m, "type         : cipher
  ");
  		seq_printf(m, "blocksize    : %u
  ", alg->cra_blocksize);
  		seq_printf(m, "min keysize  : %u
  ",
  					alg->cra_cipher.cia_min_keysize);
  		seq_printf(m, "max keysize  : %u
  ",
  					alg->cra_cipher.cia_max_keysize);
  		break;

  	case CRYPTO_ALG_TYPE_COMPRESS:
  		seq_printf(m, "type         : compression
  ");
  		break;
  	default:

  		seq_printf(m, "type         : unknown
  ");

  		break;
  	}

  out:

  	seq_putc(m, '
  ');
  	return 0;
  }

  static const struct seq_operations crypto_seq_ops = {

  	.start		= c_start,
  	.next		= c_next,
  	.stop		= c_stop,
  	.show		= c_show
  };

  void __init crypto_init_proc(void)
  {

  	proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);

  }

  
  void __exit crypto_exit_proc(void)
  {
  	remove_proc_entry("crypto", NULL);
  }