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/list.h>
  14 #include <linux/module.h>
  15 #include <linux/notifier.h>
  16 #include <linux/numa.h>
  17 #include <linux/refcount.h>
  18 #include <linux/rwsem.h>
  19 #include <linux/sched.h>
  20 #include <linux/types.h>
  21
  22 struct crypto_instance;
  23 struct crypto_template;
  24
  25 struct crypto_larval {
  26         struct crypto_alg alg;
  27         struct crypto_alg *adult;
  28         struct completion completion;
  29         u32 mask;
  30 };
  31
  32 extern struct list_head crypto_alg_list;
  33 extern struct rw_semaphore crypto_alg_sem;
  34 extern struct blocking_notifier_head crypto_chain;
  35
  36 #ifdef CONFIG_PROC_FS
  37 void __init crypto_init_proc(void);
  38 void __exit crypto_exit_proc(void);
  39 #else
  40 static inline void crypto_init_proc(void)
  41 { }
  42 static inline void crypto_exit_proc(void)
  43 { }
  44 #endif
  45
  46 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  47 {
  48         return alg->cra_ctxsize;
  49 }
  50
  51 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  52 {
  53         return alg->cra_ctxsize;
  54 }
  55
  56 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  57 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  58
  59 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  60 void crypto_larval_kill(struct crypto_alg *alg);
  61 void crypto_alg_tested(const char *name, int err);
  62
  63 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  64                           struct crypto_alg *nalg);
  65 void crypto_remove_final(struct list_head *list);
  66 void crypto_shoot_alg(struct crypto_alg *alg);
  67 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  68                                       u32 mask);
  69 void *crypto_create_tfm_node(struct crypto_alg *alg,
  70                         const struct crypto_type *frontend, int node);
  71
  72 static inline void *crypto_create_tfm(struct crypto_alg *alg,
  73                         const struct crypto_type *frontend)
  74 {
  75         return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
  76 }
  77
  78 struct crypto_alg *crypto_find_alg(const char *alg_name,
  79                                    const struct crypto_type *frontend,
  80                                    u32 type, u32 mask);
  81
  82 void *crypto_alloc_tfm_node(const char *alg_name,
  83                        const struct crypto_type *frontend, u32 type, u32 mask,
  84                        int node);
  85
  86 static inline void *crypto_alloc_tfm(const char *alg_name,
  87                        const struct crypto_type *frontend, u32 type, u32 mask)
  88 {
  89         return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
  90 }
  91
  92 int crypto_probing_notify(unsigned long val, void *v);
  93
  94 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
  95
  96 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
  97                         u32 type, u32 mask);
  98
  99 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 100 {
 101         refcount_inc(&alg->cra_refcnt);
 102         return alg;
 103 }
 104
 105 static inline void crypto_alg_put(struct crypto_alg *alg)
 106 {
 107         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 108                 alg->cra_destroy(alg);
 109 }
 110
 111 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 112 {
 113         return try_module_get(tmpl->module);
 114 }
 115
 116 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 117 {
 118         module_put(tmpl->module);
 119 }
 120
 121 static inline int crypto_is_larval(struct crypto_alg *alg)
 122 {
 123         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 124 }
 125
 126 static inline int crypto_is_dead(struct crypto_alg *alg)
 127 {
 128         return alg->cra_flags & CRYPTO_ALG_DEAD;
 129 }
 130
 131 static inline int crypto_is_moribund(struct crypto_alg *alg)
 132 {
 133         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 134 }
 135
 136 static inline void crypto_notify(unsigned long val, void *v)
 137 {
 138         blocking_notifier_call_chain(&crypto_chain, val, v);
 139 }
 140
 141 static inline void crypto_yield(u32 flags)
 142 {
 143         if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
 144                 cond_resched();
 145 }
 146
 147 #endif  /* _CRYPTO_INTERNAL_H */
 148