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 #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS 51 static inline bool crypto_boot_test_finished(void) 52 { 53 return true; 54 } 55 static inline void set_crypto_boot_test_finished(void) 56 { 57 } 58 #else 59 DECLARE_STATIC_KEY_FALSE(__crypto_boot_test_finished); 60 static inline bool crypto_boot_test_finished(void) 61 { 62 return static_branch_likely(&__crypto_boot_test_finished); 63 } 64 static inline void set_crypto_boot_test_finished(void) 65 { 66 static_branch_enable(&__crypto_boot_test_finished); 67 } 68 #endif /* !CONFIG_CRYPTO_MANAGER_DISABLE_TESTS */ 69 70 #ifdef CONFIG_PROC_FS 71 void __init crypto_init_proc(void); 72 void __exit crypto_exit_proc(void); 73 #else 74 static inline void crypto_init_proc(void) 75 { } 76 static inline void crypto_exit_proc(void) 77 { } 78 #endif 79 80 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 81 { 82 return alg->cra_ctxsize; 83 } 84 85 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 86 { 87 return alg->cra_ctxsize; 88 } 89 90 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 91 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 92 93 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 94 void crypto_larval_kill(struct crypto_alg *alg); 95 void crypto_wait_for_test(struct crypto_larval *larval); 96 void crypto_alg_tested(const char *name, int err); 97 98 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 99 struct crypto_alg *nalg); 100 void crypto_remove_final(struct list_head *list); 101 void crypto_shoot_alg(struct crypto_alg *alg); 102 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 103 u32 mask); 104 void *crypto_create_tfm_node(struct crypto_alg *alg, 105 const struct crypto_type *frontend, int node); 106 107 static inline void *crypto_create_tfm(struct crypto_alg *alg, 108 const struct crypto_type *frontend) 109 { 110 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); 111 } 112 113 struct crypto_alg *crypto_find_alg(const char *alg_name, 114 const struct crypto_type *frontend, 115 u32 type, u32 mask); 116 117 void *crypto_alloc_tfm_node(const char *alg_name, 118 const struct crypto_type *frontend, u32 type, u32 mask, 119 int node); 120 121 static inline void *crypto_alloc_tfm(const char *alg_name, 122 const struct crypto_type *frontend, u32 type, u32 mask) 123 { 124 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); 125 } 126 127 int crypto_probing_notify(unsigned long val, void *v); 128 129 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 130 131 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 132 u32 type, u32 mask); 133 134 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 135 { 136 refcount_inc(&alg->cra_refcnt); 137 return alg; 138 } 139 140 static inline void crypto_alg_put(struct crypto_alg *alg) 141 { 142 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 143 alg->cra_destroy(alg); 144 } 145 146 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 147 { 148 return try_module_get(tmpl->module); 149 } 150 151 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 152 { 153 module_put(tmpl->module); 154 } 155 156 static inline int crypto_is_larval(struct crypto_alg *alg) 157 { 158 return alg->cra_flags & CRYPTO_ALG_LARVAL; 159 } 160 161 static inline int crypto_is_dead(struct crypto_alg *alg) 162 { 163 return alg->cra_flags & CRYPTO_ALG_DEAD; 164 } 165 166 static inline int crypto_is_moribund(struct crypto_alg *alg) 167 { 168 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 169 } 170 171 static inline void crypto_notify(unsigned long val, void *v) 172 { 173 blocking_notifier_call_chain(&crypto_chain, val, v); 174 } 175 176 static inline void crypto_yield(u32 flags) 177 { 178 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) 179 cond_resched(); 180 } 181 182 static inline int crypto_is_test_larval(struct crypto_larval *larval) 183 { 184 return larval->alg.cra_driver_name[0]; 185 } 186 187 #endif /* _CRYPTO_INTERNAL_H */ 188 189