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 enum {
  33         CRYPTOA_UNSPEC,
  34         CRYPTOA_ALG,
  35         CRYPTOA_TYPE,
  36         __CRYPTOA_MAX,
  37 };
  38
  39 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
  40
  41 /* Maximum number of (rtattr) parameters for each template. */
  42 #define CRYPTO_MAX_ATTRS 32
  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
  48 #ifdef CONFIG_PROC_FS
  49 void __init crypto_init_proc(void);
  50 void __exit crypto_exit_proc(void);
  51 #else
  52 static inline void crypto_init_proc(void)
  53 { }
  54 static inline void crypto_exit_proc(void)
  55 { }
  56 #endif
  57
  58 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  59 {
  60         return alg->cra_ctxsize;
  61 }
  62
  63 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  64 {
  65         return alg->cra_ctxsize;
  66 }
  67
  68 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  69 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  70
  71 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  72 void crypto_larval_kill(struct crypto_alg *alg);
  73 void crypto_alg_tested(const char *name, int err);
  74
  75 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  76                           struct crypto_alg *nalg);
  77 void crypto_remove_final(struct list_head *list);
  78 void crypto_shoot_alg(struct crypto_alg *alg);
  79 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  80                                       u32 mask);
  81 void *crypto_create_tfm_node(struct crypto_alg *alg,
  82                         const struct crypto_type *frontend, int node);
  83
  84 static inline void *crypto_create_tfm(struct crypto_alg *alg,
  85                         const struct crypto_type *frontend)
  86 {
  87         return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
  88 }
  89
  90 struct crypto_alg *crypto_find_alg(const char *alg_name,
  91                                    const struct crypto_type *frontend,
  92                                    u32 type, u32 mask);
  93
  94 void *crypto_alloc_tfm_node(const char *alg_name,
  95                        const struct crypto_type *frontend, u32 type, u32 mask,
  96                        int node);
  97
  98 static inline void *crypto_alloc_tfm(const char *alg_name,
  99                        const struct crypto_type *frontend, u32 type, u32 mask)
 100 {
 101         return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
 102 }
 103
 104 int crypto_probing_notify(unsigned long val, void *v);
 105
 106 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
 107
 108 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
 109                         u32 type, u32 mask);
 110
 111 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 112 {
 113         refcount_inc(&alg->cra_refcnt);
 114         return alg;
 115 }
 116
 117 static inline void crypto_alg_put(struct crypto_alg *alg)
 118 {
 119         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 120                 alg->cra_destroy(alg);
 121 }
 122
 123 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 124 {
 125         return try_module_get(tmpl->module);
 126 }
 127
 128 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 129 {
 130         module_put(tmpl->module);
 131 }
 132
 133 static inline int crypto_is_larval(struct crypto_alg *alg)
 134 {
 135         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 136 }
 137
 138 static inline int crypto_is_dead(struct crypto_alg *alg)
 139 {
 140         return alg->cra_flags & CRYPTO_ALG_DEAD;
 141 }
 142
 143 static inline int crypto_is_moribund(struct crypto_alg *alg)
 144 {
 145         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 146 }
 147
 148 static inline void crypto_notify(unsigned long val, void *v)
 149 {
 150         blocking_notifier_call_chain(&crypto_chain, val, v);
 151 }
 152
 153 static inline void crypto_yield(u32 flags)
 154 {
 155         if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
 156                 cond_resched();
 157 }
 158
 159 #endif  /* _CRYPTO_INTERNAL_H */
 160