dd8b083f9a
Introduce a facility that can be used to receive a notification callback when a new algorithm becomes available. This can be used by existing crypto registrations to trigger a switch from a software-only algorithm to a hardware-accelerated version. A new CRYPTO_MSG_ALG_LOADED state is introduced to the existing crypto notification chain, and the register/unregister functions are exported so they can be called by subsystems outside of crypto. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Suggested-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* Cryptographic API.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_INTERNAL_H
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#define _CRYPTO_INTERNAL_H
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#include <crypto/algapi.h>
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#include <linux/completion.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/rwsem.h>
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#include <linux/slab.h>
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struct crypto_instance;
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struct crypto_template;
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struct crypto_larval {
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struct crypto_alg alg;
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struct crypto_alg *adult;
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struct completion completion;
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u32 mask;
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};
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extern struct list_head crypto_alg_list;
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extern struct rw_semaphore crypto_alg_sem;
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extern struct blocking_notifier_head crypto_chain;
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#ifdef CONFIG_PROC_FS
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void __init crypto_init_proc(void);
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void __exit crypto_exit_proc(void);
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#else
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static inline void crypto_init_proc(void)
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{ }
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static inline void crypto_exit_proc(void)
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{ }
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#endif
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static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
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{
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return alg->cra_ctxsize;
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}
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static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
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{
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return alg->cra_ctxsize;
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}
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struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
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struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
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int crypto_init_cipher_ops(struct crypto_tfm *tfm);
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int crypto_init_compress_ops(struct crypto_tfm *tfm);
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struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
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void crypto_larval_kill(struct crypto_alg *alg);
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void crypto_alg_tested(const char *name, int err);
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void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
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struct crypto_alg *nalg);
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void crypto_remove_final(struct list_head *list);
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void crypto_shoot_alg(struct crypto_alg *alg);
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struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
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u32 mask);
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void *crypto_create_tfm(struct crypto_alg *alg,
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const struct crypto_type *frontend);
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struct crypto_alg *crypto_find_alg(const char *alg_name,
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const struct crypto_type *frontend,
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u32 type, u32 mask);
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void *crypto_alloc_tfm(const char *alg_name,
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const struct crypto_type *frontend, u32 type, u32 mask);
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int crypto_probing_notify(unsigned long val, void *v);
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unsigned int crypto_alg_extsize(struct crypto_alg *alg);
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int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
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u32 type, u32 mask);
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static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
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{
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refcount_inc(&alg->cra_refcnt);
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return alg;
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}
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static inline void crypto_alg_put(struct crypto_alg *alg)
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{
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if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
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alg->cra_destroy(alg);
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}
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static inline int crypto_tmpl_get(struct crypto_template *tmpl)
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{
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return try_module_get(tmpl->module);
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}
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static inline void crypto_tmpl_put(struct crypto_template *tmpl)
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{
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module_put(tmpl->module);
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}
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static inline int crypto_is_larval(struct crypto_alg *alg)
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{
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return alg->cra_flags & CRYPTO_ALG_LARVAL;
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}
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static inline int crypto_is_dead(struct crypto_alg *alg)
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{
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return alg->cra_flags & CRYPTO_ALG_DEAD;
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}
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static inline int crypto_is_moribund(struct crypto_alg *alg)
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{
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return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
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}
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static inline void crypto_notify(unsigned long val, void *v)
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{
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blocking_notifier_call_chain(&crypto_chain, val, v);
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}
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#endif /* _CRYPTO_INTERNAL_H */
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