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
  32extern struct list_head crypto_alg_list;
  33extern struct rw_semaphore crypto_alg_sem;
  34extern struct blocking_notifier_head crypto_chain;
  35
  36#ifdef CONFIG_PROC_FS
  37void __init crypto_init_proc(void);
  38void __exit crypto_exit_proc(void);
  39#else
  40static inline void crypto_init_proc(void)
  41{ }
  42static inline void crypto_exit_proc(void)
  43{ }
  44#endif
  45
  46static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  47{
  48        return alg->cra_ctxsize;
  49}
  50
  51static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  52{
  53        return alg->cra_ctxsize;
  54}
  55
  56struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  57struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  58
  59struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  60void crypto_larval_kill(struct crypto_alg *alg);
  61void crypto_alg_tested(const char *name, int err);
  62
  63void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  64                          struct crypto_alg *nalg);
  65void crypto_remove_final(struct list_head *list);
  66void crypto_shoot_alg(struct crypto_alg *alg);
  67struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  68                                      u32 mask);
  69void *crypto_create_tfm_node(struct crypto_alg *alg,
  70                        const struct crypto_type *frontend, int node);
  71
  72static 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
  78struct crypto_alg *crypto_find_alg(const char *alg_name,
  79                                   const struct crypto_type *frontend,
  80                                   u32 type, u32 mask);
  81
  82void *crypto_alloc_tfm_node(const char *alg_name,
  83                       const struct crypto_type *frontend, u32 type, u32 mask,
  84                       int node);
  85
  86static 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
  92int crypto_probing_notify(unsigned long val, void *v);
  93
  94unsigned int crypto_alg_extsize(struct crypto_alg *alg);
  95
  96int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
  97                        u32 type, u32 mask);
  98
  99static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 100{
 101        refcount_inc(&alg->cra_refcnt);
 102        return alg;
 103}
 104
 105static 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
 111static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 112{
 113        return try_module_get(tmpl->module);
 114}
 115
 116static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 117{
 118        module_put(tmpl->module);
 119}
 120
 121static inline int crypto_is_larval(struct crypto_alg *alg)
 122{
 123        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 124}
 125
 126static inline int crypto_is_dead(struct crypto_alg *alg)
 127{
 128        return alg->cra_flags & CRYPTO_ALG_DEAD;
 129}
 130
 131static inline int crypto_is_moribund(struct crypto_alg *alg)
 132{
 133        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 134}
 135
 136static inline void crypto_notify(unsigned long val, void *v)
 137{
 138        blocking_notifier_call_chain(&crypto_chain, val, v);
 139}
 140
 141static 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