15333038d5
The netlink gfp_any() problem made me double-check the uses of in_softirq() in crypto/*. It seems to me that we should be checking in_atomic() instead of in_softirq() in crypto_yield. Otherwise people calling the crypto ops with spin locks held or preemption disabled will get burnt, right? Signed-off-by: David S. Miller <davem@davemloft.net>
92 lines
2.4 KiB
C
92 lines
2.4 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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*
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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 <linux/crypto.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/kmod.h>
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#include <asm/kmap_types.h>
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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(struct crypto_tfm *tfm)
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{
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if (!in_atomic())
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cond_resched();
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}
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static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
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{
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return (void *)&tfm[1];
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}
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struct crypto_alg *crypto_alg_lookup(const char *name);
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/* A far more intelligent version of this is planned. For now, just
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* try an exact match on the name of the algorithm. */
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static inline struct crypto_alg *crypto_alg_mod_lookup(const char *name)
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{
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return try_then_request_module(crypto_alg_lookup(name), name);
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}
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#ifdef CONFIG_CRYPTO_HMAC
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int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
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void crypto_free_hmac_block(struct crypto_tfm *tfm);
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#else
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static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
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{
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return 0;
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}
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static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
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{ }
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#endif
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#ifdef CONFIG_PROC_FS
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void __init crypto_init_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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#endif
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int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
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int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
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int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
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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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#endif /* _CRYPTO_INTERNAL_H */
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