internal.h 4.2 KB

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  1. /*
  2. * Cryptographic API.
  3. *
  4. * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  5. * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
  6. *
  7. * This program is free software; you can redistribute it and/or modify it
  8. * under the terms of the GNU General Public License as published by the Free
  9. * Software Foundation; either version 2 of the License, or (at your option)
  10. * any later version.
  11. *
  12. */
  13. #ifndef _CRYPTO_INTERNAL_H
  14. #define _CRYPTO_INTERNAL_H
  15. #include <crypto/algapi.h>
  16. #include <linux/completion.h>
  17. #include <linux/mm.h>
  18. #include <linux/highmem.h>
  19. #include <linux/interrupt.h>
  20. #include <linux/init.h>
  21. #include <linux/list.h>
  22. #include <linux/module.h>
  23. #include <linux/kernel.h>
  24. #include <linux/notifier.h>
  25. #include <linux/rwsem.h>
  26. #include <linux/slab.h>
  27. #include <asm/kmap_types.h>
  28. /* Crypto notification events. */
  29. enum {
  30. CRYPTO_MSG_ALG_REQUEST,
  31. CRYPTO_MSG_ALG_REGISTER,
  32. CRYPTO_MSG_ALG_UNREGISTER,
  33. CRYPTO_MSG_TMPL_REGISTER,
  34. CRYPTO_MSG_TMPL_UNREGISTER,
  35. };
  36. struct crypto_instance;
  37. struct crypto_template;
  38. struct crypto_larval {
  39. struct crypto_alg alg;
  40. struct crypto_alg *adult;
  41. struct completion completion;
  42. u32 mask;
  43. };
  44. extern struct list_head crypto_alg_list;
  45. extern struct rw_semaphore crypto_alg_sem;
  46. extern struct blocking_notifier_head crypto_chain;
  47. extern enum km_type crypto_km_types[];
  48. static inline enum km_type crypto_kmap_type(int out)
  49. {
  50. return crypto_km_types[(in_softirq() ? 2 : 0) + out];
  51. }
  52. static inline void *crypto_kmap(struct page *page, int out)
  53. {
  54. return kmap_atomic(page, crypto_kmap_type(out));
  55. }
  56. static inline void crypto_kunmap(void *vaddr, int out)
  57. {
  58. kunmap_atomic(vaddr, crypto_kmap_type(out));
  59. }
  60. static inline void crypto_yield(u32 flags)
  61. {
  62. if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
  63. cond_resched();
  64. }
  65. #ifdef CONFIG_PROC_FS
  66. void __init crypto_init_proc(void);
  67. void __exit crypto_exit_proc(void);
  68. #else
  69. static inline void crypto_init_proc(void)
  70. { }
  71. static inline void crypto_exit_proc(void)
  72. { }
  73. #endif
  74. static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
  75. {
  76. unsigned int len = alg->cra_ctxsize;
  77. if (alg->cra_alignmask) {
  78. len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
  79. len += alg->cra_digest.dia_digestsize;
  80. }
  81. return len;
  82. }
  83. static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  84. {
  85. return alg->cra_ctxsize;
  86. }
  87. static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  88. {
  89. return alg->cra_ctxsize;
  90. }
  91. struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  92. struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
  93. struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  94. int crypto_init_digest_ops(struct crypto_tfm *tfm);
  95. int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  96. int crypto_init_compress_ops(struct crypto_tfm *tfm);
  97. void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  98. void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  99. void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  100. void crypto_larval_error(const char *name, u32 type, u32 mask);
  101. void crypto_shoot_alg(struct crypto_alg *alg);
  102. struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  103. u32 mask);
  104. int crypto_register_instance(struct crypto_template *tmpl,
  105. struct crypto_instance *inst);
  106. int crypto_register_notifier(struct notifier_block *nb);
  107. int crypto_unregister_notifier(struct notifier_block *nb);
  108. static inline void crypto_alg_put(struct crypto_alg *alg)
  109. {
  110. if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
  111. alg->cra_destroy(alg);
  112. }
  113. static inline int crypto_tmpl_get(struct crypto_template *tmpl)
  114. {
  115. return try_module_get(tmpl->module);
  116. }
  117. static inline void crypto_tmpl_put(struct crypto_template *tmpl)
  118. {
  119. module_put(tmpl->module);
  120. }
  121. static inline int crypto_is_larval(struct crypto_alg *alg)
  122. {
  123. return alg->cra_flags & CRYPTO_ALG_LARVAL;
  124. }
  125. static inline int crypto_is_dead(struct crypto_alg *alg)
  126. {
  127. return alg->cra_flags & CRYPTO_ALG_DEAD;
  128. }
  129. static inline int crypto_is_moribund(struct crypto_alg *alg)
  130. {
  131. return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
  132. }
  133. static inline int crypto_notify(unsigned long val, void *v)
  134. {
  135. return blocking_notifier_call_chain(&crypto_chain, val, v);
  136. }
  137. #endif /* _CRYPTO_INTERNAL_H */