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When complex algorithms that depend on other algorithms are built into the kernel, the order of registration must be done such that the underlying algorithms are ready before the ones on top are registered. As otherwise they would fail during the self-test which is required during registration. In the past we have used subsystem initialisation ordering to guarantee this. The number of such precedence levels are limited and they may cause ripple effects in other subsystems. This patch solves this problem by delaying all self-tests during boot-up for built-in algorithms. They will be tested either when something else in the kernel requests for them, or when we have finished registering all built-in algorithms, whichever comes earlier. Reported-by: Vladis Dronov <vdronov@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
171 lines
4.3 KiB
C
171 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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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#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/jump_label.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/notifier.h>
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#include <linux/numa.h>
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#include <linux/refcount.h>
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#include <linux/rwsem.h>
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#include <linux/sched.h>
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#include <linux/types.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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bool test_started;
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};
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enum {
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CRYPTOA_UNSPEC,
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CRYPTOA_ALG,
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CRYPTOA_TYPE,
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__CRYPTOA_MAX,
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};
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#define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
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/* Maximum number of (rtattr) parameters for each template. */
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#define CRYPTO_MAX_ATTRS 32
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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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DECLARE_STATIC_KEY_FALSE(crypto_boot_test_finished);
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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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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_wait_for_test(struct crypto_larval *larval);
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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_node(struct crypto_alg *alg,
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const struct crypto_type *frontend, int node);
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static inline void *crypto_create_tfm(struct crypto_alg *alg,
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const struct crypto_type *frontend)
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{
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return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
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}
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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_node(const char *alg_name,
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const struct crypto_type *frontend, u32 type, u32 mask,
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int node);
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static inline 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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{
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return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
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}
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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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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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static inline int crypto_is_test_larval(struct crypto_larval *larval)
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{
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return larval->alg.cra_driver_name[0];
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}
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#endif /* _CRYPTO_INTERNAL_H */
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