proc.c 2.5 KB

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  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. #include <linux/atomic.h>
  11. #include <linux/init.h>
  12. #include <linux/crypto.h>
  13. #include <linux/module.h> /* for module_name() */
  14. #include <linux/rwsem.h>
  15. #include <linux/proc_fs.h>
  16. #include <linux/seq_file.h>
  17. #include "internal.h"
  18. static void *c_start(struct seq_file *m, loff_t *pos)
  19. {
  20. down_read(&crypto_alg_sem);
  21. return seq_list_start(&crypto_alg_list, *pos);
  22. }
  23. static void *c_next(struct seq_file *m, void *p, loff_t *pos)
  24. {
  25. return seq_list_next(p, &crypto_alg_list, pos);
  26. }
  27. static void c_stop(struct seq_file *m, void *p)
  28. {
  29. up_read(&crypto_alg_sem);
  30. }
  31. static int c_show(struct seq_file *m, void *p)
  32. {
  33. struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
  34. seq_printf(m, "name : %s\n", alg->cra_name);
  35. seq_printf(m, "driver : %s\n", alg->cra_driver_name);
  36. seq_printf(m, "module : %s\n", module_name(alg->cra_module));
  37. seq_printf(m, "priority : %d\n", alg->cra_priority);
  38. seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
  39. seq_printf(m, "selftest : %s\n",
  40. (alg->cra_flags & CRYPTO_ALG_TESTED) ?
  41. "passed" : "unknown");
  42. seq_printf(m, "internal : %s\n",
  43. (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
  44. "yes" : "no");
  45. if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
  46. seq_printf(m, "type : larval\n");
  47. seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
  48. goto out;
  49. }
  50. if (alg->cra_type && alg->cra_type->show) {
  51. alg->cra_type->show(m, alg);
  52. goto out;
  53. }
  54. switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
  55. case CRYPTO_ALG_TYPE_CIPHER:
  56. seq_printf(m, "type : cipher\n");
  57. seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
  58. seq_printf(m, "min keysize : %u\n",
  59. alg->cra_cipher.cia_min_keysize);
  60. seq_printf(m, "max keysize : %u\n",
  61. alg->cra_cipher.cia_max_keysize);
  62. break;
  63. case CRYPTO_ALG_TYPE_COMPRESS:
  64. seq_printf(m, "type : compression\n");
  65. break;
  66. default:
  67. seq_printf(m, "type : unknown\n");
  68. break;
  69. }
  70. out:
  71. seq_putc(m, '\n');
  72. return 0;
  73. }
  74. static const struct seq_operations crypto_seq_ops = {
  75. .start = c_start,
  76. .next = c_next,
  77. .stop = c_stop,
  78. .show = c_show
  79. };
  80. void __init crypto_init_proc(void)
  81. {
  82. proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
  83. }
  84. void __exit crypto_exit_proc(void)
  85. {
  86. remove_proc_entry("crypto", NULL);
  87. }