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/jump_label.h> 14 #include <linux/list.h> 15 #include <linux/module.h> 16 #include <linux/notifier.h> 17 #include <linux/numa.h> 18 #include <linux/refcount.h> 19 #include <linux/rwsem.h> 20 #include <linux/sched.h> 21 #include <linux/types.h> 22 23 struct crypto_instance; 24 struct crypto_template; 25 26 struct crypto_larval { 27 struct crypto_alg alg; 28 struct crypto_alg *adult; 29 struct completion completion; 30 u32 mask; 31 bool test_started; 32 }; 33 34 enum { 35 CRYPTOA_UNSPEC, 36 CRYPTOA_ALG, 37 CRYPTOA_TYPE, 38 __CRYPTOA_MAX, 39 }; 40 41 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) 42 43 /* Maximum number of (rtattr) parameters for each template. */ 44 #define CRYPTO_MAX_ATTRS 32 45 46 extern struct list_head crypto_alg_list; 47 extern struct rw_semaphore crypto_alg_sem; 48 extern struct blocking_notifier_head crypto_chain; 49 50 DECLARE_STATIC_KEY_FALSE(crypto_boot_test_finished); 51 52 #ifdef CONFIG_PROC_FS 53 void __init crypto_init_proc(void); 54 void __exit crypto_exit_proc(void); 55 #else 56 static inline void crypto_init_proc(void) 57 { } 58 static inline void crypto_exit_proc(void) 59 { } 60 #endif 61 62 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 63 { 64 return alg->cra_ctxsize; 65 } 66 67 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 68 { 69 return alg->cra_ctxsize; 70 } 71 72 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 73 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 74 75 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 76 void crypto_larval_kill(struct crypto_alg *alg); 77 void crypto_wait_for_test(struct crypto_larval *larval); 78 void crypto_alg_tested(const char *name, int err); 79 80 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 81 struct crypto_alg *nalg); 82 void crypto_remove_final(struct list_head *list); 83 void crypto_shoot_alg(struct crypto_alg *alg); 84 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 85 u32 mask); 86 void *crypto_create_tfm_node(struct crypto_alg *alg, 87 const struct crypto_type *frontend, int node); 88 89 static inline void *crypto_create_tfm(struct crypto_alg *alg, 90 const struct crypto_type *frontend) 91 { 92 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 93 } 94 95 struct crypto_alg *crypto_find_alg(const char *alg_name, 96 const struct crypto_type *frontend, 97 u32 type, u32 mask); 98 99 void *crypto_alloc_tfm_node(const char *alg_name, 100 const struct crypto_type *frontend, u32 type, u32 mask, 101 int node); 102 103 static inline void *crypto_alloc_tfm(const char *alg_name, 104 const struct crypto_type *frontend, u32 type, u32 mask) 105 { 106 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 107 } 108 109 int crypto_probing_notify(unsigned long val, void *v); 110 111 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 112 113 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 114 u32 type, u32 mask); 115 116 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 117 { 118 refcount_inc(&alg->cra_refcnt); 119 return alg; 120 } 121 122 static inline void crypto_alg_put(struct crypto_alg *alg) 123 { 124 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 125 alg->cra_destroy(alg); 126 } 127 128 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 129 { 130 return try_module_get(tmpl->module); 131 } 132 133 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 134 { 135 module_put(tmpl->module); 136 } 137 138 static inline int crypto_is_larval(struct crypto_alg *alg) 139 { 140 return alg->cra_flags & CRYPTO_ALG_LARVAL; 141 } 142 143 static inline int crypto_is_dead(struct crypto_alg *alg) 144 { 145 return alg->cra_flags & CRYPTO_ALG_DEAD; 146 } 147 148 static inline int crypto_is_moribund(struct crypto_alg *alg) 149 { 150 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 151 } 152 153 static inline void crypto_notify(unsigned long val, void *v) 154 { 155 blocking_notifier_call_chain(&crypto_chain, val, v); 156 } 157 158 static inline void crypto_yield(u32 flags) 159 { 160 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 161 cond_resched(); 162 } 163 164 static inline int crypto_is_test_larval(struct crypto_larval *larval) 165 { 166 return larval->alg.cra_driver_name[0]; 167 } 168 169 #endif /* _CRYPTO_INTERNAL_H */ 170 171