crypto/internal.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Cryptographic API.
   4  *
   5  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   6  * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
   7  */
   8 #ifndef _CRYPTO_INTERNAL_H
   9 #define _CRYPTO_INTERNAL_H
  10
  11 #include <crypto/algapi.h>
  12 #include <linux/completion.h>
  13 #include <linux/mm.h>
  14 #include <linux/highmem.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/init.h>
  17 #include <linux/list.h>
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/notifier.h>
  21 #include <linux/rwsem.h>
  22 #include <linux/slab.h>
  23
  24 struct crypto_instance;
  25 struct crypto_template;
  26
  27 struct crypto_larval {
  28         struct crypto_alg alg;
  29         struct crypto_alg *adult;
  30         struct completion completion;
  31         u32 mask;
  32 };
  33
  34 extern struct list_head crypto_alg_list;
  35 extern struct rw_semaphore crypto_alg_sem;
  36 extern struct blocking_notifier_head crypto_chain;
  37
  38 #ifdef CONFIG_PROC_FS
  39 void __init crypto_init_proc(void);
  40 void __exit crypto_exit_proc(void);
  41 #else
  42 static inline void crypto_init_proc(void)
  43 { }
  44 static inline void crypto_exit_proc(void)
  45 { }
  46 #endif
  47
  48 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  49 {
  50         return alg->cra_ctxsize;
  51 }
  52
  53 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  54 {
  55         return alg->cra_ctxsize;
  56 }
  57
  58 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  59 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  60
  61 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  62 void crypto_larval_kill(struct crypto_alg *alg);
  63 void crypto_alg_tested(const char *name, int err);
  64
  65 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  66                           struct crypto_alg *nalg);
  67 void crypto_remove_final(struct list_head *list);
  68 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  69                                       u32 mask);
  70 void *crypto_create_tfm(struct crypto_alg *alg,
  71                         const struct crypto_type *frontend);
  72 struct crypto_alg *crypto_find_alg(const char *alg_name,
  73                                    const struct crypto_type *frontend,
  74                                    u32 type, u32 mask);
  75 void *crypto_alloc_tfm(const char *alg_name,
  76                        const struct crypto_type *frontend, u32 type, u32 mask);
  77
  78 int crypto_probing_notify(unsigned long val, void *v);
  79
  80 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
  81
  82 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
  83                         u32 type, u32 mask);
  84
  85 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
  86 {
  87         refcount_inc(&alg->cra_refcnt);
  88         return alg;
  89 }
  90
  91 static inline void crypto_alg_put(struct crypto_alg *alg)
  92 {
  93         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
  94                 alg->cra_destroy(alg);
  95 }
  96
  97 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
  98 {
  99         return try_module_get(tmpl->module);
 100 }
 101
 102 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 103 {
 104         module_put(tmpl->module);
 105 }
 106
 107 static inline int crypto_is_larval(struct crypto_alg *alg)
 108 {
 109         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 110 }
 111
 112 static inline int crypto_is_dead(struct crypto_alg *alg)
 113 {
 114         return alg->cra_flags & CRYPTO_ALG_DEAD;
 115 }
 116
 117 static inline int crypto_is_moribund(struct crypto_alg *alg)
 118 {
 119         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 120 }
 121
 122 static inline void crypto_notify(unsigned long val, void *v)
 123 {
 124         blocking_notifier_call_chain(&crypto_chain, val, v);
 125 }
 126
 127 #endif  /* _CRYPTO_INTERNAL_H */
 128