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 */ 160 161