LXR linux/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
  22struct crypto_instance;
  23struct crypto_template;
  24
  25struct crypto_larval {
  26        struct crypto_alg alg;
  27        struct crypto_alg *adult;
  28        struct completion completion;
  29        u32 mask;
  30};
  31
  32enum {
  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
  44extern struct list_head crypto_alg_list;
  45extern struct rw_semaphore crypto_alg_sem;
  46extern struct blocking_notifier_head crypto_chain;
  47
  48#ifdef CONFIG_PROC_FS
  49void __init crypto_init_proc(void);
  50void __exit crypto_exit_proc(void);
  51#else
  52static inline void crypto_init_proc(void)
  53{ }
  54static inline void crypto_exit_proc(void)
  55{ }
  56#endif
  57
  58static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  59{
  60        return alg->cra_ctxsize;
  61}
  62
  63static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  64{
  65        return alg->cra_ctxsize;
  66}
  67
  68struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  69struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  70
  71struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  72void crypto_larval_kill(struct crypto_alg *alg);
  73void crypto_alg_tested(const char *name, int err);
  74
  75void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  76                          struct crypto_alg *nalg);
  77void crypto_remove_final(struct list_head *list);
  78void crypto_shoot_alg(struct crypto_alg *alg);
  79struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  80                                      u32 mask);
  81void *crypto_create_tfm_node(struct crypto_alg *alg,
  82                        const struct crypto_type *frontend, int node);
  83
  84static 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
  90struct crypto_alg *crypto_find_alg(const char *alg_name,
  91                                   const struct crypto_type *frontend,
  92                                   u32 type, u32 mask);
  93
  94void *crypto_alloc_tfm_node(const char *alg_name,
  95                       const struct crypto_type *frontend, u32 type, u32 mask,
  96                       int node);
  97
  98static 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
 104int crypto_probing_notify(unsigned long val, void *v);
 105
 106unsigned int crypto_alg_extsize(struct crypto_alg *alg);
 107
 108int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
 109                        u32 type, u32 mask);
 110
 111static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 112{
 113        refcount_inc(&alg->cra_refcnt);
 114        return alg;
 115}
 116
 117static 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
 123static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 124{
 125        return try_module_get(tmpl->module);
 126}
 127
 128static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 129{
 130        module_put(tmpl->module);
 131}
 132
 133static inline int crypto_is_larval(struct crypto_alg *alg)
 134{
 135        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 136}
 137
 138static inline int crypto_is_dead(struct crypto_alg *alg)
 139{
 140        return alg->cra_flags & CRYPTO_ALG_DEAD;
 141}
 142
 143static inline int crypto_is_moribund(struct crypto_alg *alg)
 144{
 145        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 146}
 147
 148static inline void crypto_notify(unsigned long val, void *v)
 149{
 150        blocking_notifier_call_chain(&crypto_chain, val, v);
 151}
 152
 153static 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