mirror of
https://github.com/torvalds/linux
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27d2a33007
This patch adds support for multiple frontend types for each backend algorithm by passing the type and mask through to the backend type init function. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
169 lines
4.2 KiB
C
169 lines
4.2 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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#include <asm/kmap_types.h>
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/* Crypto notification events. */
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enum {
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CRYPTO_MSG_ALG_REQUEST,
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CRYPTO_MSG_ALG_REGISTER,
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CRYPTO_MSG_ALG_UNREGISTER,
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CRYPTO_MSG_TMPL_REGISTER,
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CRYPTO_MSG_TMPL_UNREGISTER,
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};
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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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extern enum km_type crypto_km_types[];
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static inline enum km_type crypto_kmap_type(int out)
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{
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return crypto_km_types[(in_softirq() ? 2 : 0) + out];
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}
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static inline void *crypto_kmap(struct page *page, int out)
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{
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return kmap_atomic(page, crypto_kmap_type(out));
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}
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static inline void crypto_kunmap(void *vaddr, int out)
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{
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kunmap_atomic(vaddr, crypto_kmap_type(out));
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}
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static inline void crypto_yield(u32 flags)
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{
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if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
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cond_resched();
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}
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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_digest_ctxsize(struct crypto_alg *alg)
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{
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unsigned int len = alg->cra_ctxsize;
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if (alg->cra_alignmask) {
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len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
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len += alg->cra_digest.dia_digestsize;
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}
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return len;
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}
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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_lookup(const char *name, u32 type, u32 mask);
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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_digest_ops(struct crypto_tfm *tfm);
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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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void crypto_exit_digest_ops(struct crypto_tfm *tfm);
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void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
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void crypto_exit_compress_ops(struct crypto_tfm *tfm);
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void crypto_larval_error(const char *name, u32 type, u32 mask);
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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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int crypto_register_instance(struct crypto_template *tmpl,
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struct crypto_instance *inst);
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int crypto_register_notifier(struct notifier_block *nb);
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int crypto_unregister_notifier(struct notifier_block *nb);
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static inline void crypto_alg_put(struct crypto_alg *alg)
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{
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if (atomic_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 int crypto_notify(unsigned long val, void *v)
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{
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return blocking_notifier_call_chain(&crypto_chain, val, v);
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}
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#endif /* _CRYPTO_INTERNAL_H */
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