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 */ 148 149