Line data    Source code

       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             : extern struct list_head crypto_alg_list;
      33             : extern struct rw_semaphore crypto_alg_sem;
      34             : extern struct blocking_notifier_head crypto_chain;
      35             : 
      36             : #ifdef CONFIG_PROC_FS
      37             : void __init crypto_init_proc(void);
      38             : void __exit crypto_exit_proc(void);
      39             : #else
      40             : static inline void crypto_init_proc(void)
      41             : { }
      42             : static inline void crypto_exit_proc(void)
      43             : { }
      44             : #endif
      45             : 
      46           0 : static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
      47             : {
      48           0 :         return alg->cra_ctxsize;
      49             : }
      50             : 
      51           0 : static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
      52             : {
      53           0 :         return alg->cra_ctxsize;
      54             : }
      55             : 
      56             : struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
      57             : struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
      58             : 
      59             : struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
      60             : void crypto_larval_kill(struct crypto_alg *alg);
      61             : void crypto_alg_tested(const char *name, int err);
      62             : 
      63             : void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
      64             :                           struct crypto_alg *nalg);
      65             : void crypto_remove_final(struct list_head *list);
      66             : void crypto_shoot_alg(struct crypto_alg *alg);
      67             : struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
      68             :                                       u32 mask);
      69             : void *crypto_create_tfm_node(struct crypto_alg *alg,
      70             :                         const struct crypto_type *frontend, int node);
      71             : 
      72           0 : static inline void *crypto_create_tfm(struct crypto_alg *alg,
      73             :                         const struct crypto_type *frontend)
      74             : {
      75           0 :         return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
      76             : }
      77             : 
      78             : struct crypto_alg *crypto_find_alg(const char *alg_name,
      79             :                                    const struct crypto_type *frontend,
      80             :                                    u32 type, u32 mask);
      81             : 
      82             : void *crypto_alloc_tfm_node(const char *alg_name,
      83             :                        const struct crypto_type *frontend, u32 type, u32 mask,
      84             :                        int node);
      85             : 
      86           2 : static inline void *crypto_alloc_tfm(const char *alg_name,
      87             :                        const struct crypto_type *frontend, u32 type, u32 mask)
      88             : {
      89           2 :         return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
      90             : }
      91             : 
      92             : int crypto_probing_notify(unsigned long val, void *v);
      93             : 
      94             : unsigned int crypto_alg_extsize(struct crypto_alg *alg);
      95             : 
      96             : int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
      97             :                         u32 type, u32 mask);
      98             : 
      99          12 : static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
     100             : {
     101          12 :         refcount_inc(&alg->cra_refcnt);
     102           2 :         return alg;
     103             : }
     104             : 
     105          21 : static inline void crypto_alg_put(struct crypto_alg *alg)
     106             : {
     107          21 :         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
     108          10 :                 alg->cra_destroy(alg);
     109          21 : }
     110             : 
     111           0 : static inline int crypto_tmpl_get(struct crypto_template *tmpl)
     112             : {
     113           0 :         return try_module_get(tmpl->module);
     114             : }
     115             : 
     116           0 : static inline void crypto_tmpl_put(struct crypto_template *tmpl)
     117             : {
     118           0 :         module_put(tmpl->module);
     119             : }
     120             : 
     121         173 : static inline int crypto_is_larval(struct crypto_alg *alg)
     122             : {
     123         173 :         return alg->cra_flags & CRYPTO_ALG_LARVAL;
     124             : }
     125             : 
     126          10 : static inline int crypto_is_dead(struct crypto_alg *alg)
     127             : {
     128          10 :         return alg->cra_flags & CRYPTO_ALG_DEAD;
     129             : }
     130             : 
     131         195 : static inline int crypto_is_moribund(struct crypto_alg *alg)
     132             : {
     133         195 :         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
     134             : }
     135             : 
     136          10 : static inline void crypto_notify(unsigned long val, void *v)
     137             : {
     138          10 :         blocking_notifier_call_chain(&crypto_chain, val, v);
     139          10 : }
     140             : 
     141           0 : static inline void crypto_yield(u32 flags)
     142             : {
     143           0 :         if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
     144           0 :                 cond_resched();
     145           0 : }
     146             : 
     147             : #endif  /* _CRYPTO_INTERNAL_H */
     148             :