v4.19.13 snapshot.
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
new file mode 100644
index 0000000..bd5e8cc
--- /dev/null
+++ b/include/crypto/algapi.h
@@ -0,0 +1,428 @@
+/*
+ * Cryptographic API for algorithms (i.e., low-level API).
+ *
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#ifndef _CRYPTO_ALGAPI_H
+#define _CRYPTO_ALGAPI_H
+
+#include <linux/crypto.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+
+/*
+ * Maximum values for blocksize and alignmask, used to allocate
+ * static buffers that are big enough for any combination of
+ * ciphers and architectures.
+ */
+#define MAX_CIPHER_BLOCKSIZE 16
+#define MAX_CIPHER_ALIGNMASK 15
+
+struct crypto_aead;
+struct crypto_instance;
+struct module;
+struct rtattr;
+struct seq_file;
+
+struct crypto_type {
+ unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
+ unsigned int (*extsize)(struct crypto_alg *alg);
+ int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
+ int (*init_tfm)(struct crypto_tfm *tfm);
+ void (*show)(struct seq_file *m, struct crypto_alg *alg);
+ int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
+ void (*free)(struct crypto_instance *inst);
+
+ unsigned int type;
+ unsigned int maskclear;
+ unsigned int maskset;
+ unsigned int tfmsize;
+};
+
+struct crypto_instance {
+ struct crypto_alg alg;
+
+ struct crypto_template *tmpl;
+ struct hlist_node list;
+
+ void *__ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
+struct crypto_template {
+ struct list_head list;
+ struct hlist_head instances;
+ struct module *module;
+
+ struct crypto_instance *(*alloc)(struct rtattr **tb);
+ void (*free)(struct crypto_instance *inst);
+ int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
+
+ char name[CRYPTO_MAX_ALG_NAME];
+};
+
+struct crypto_spawn {
+ struct list_head list;
+ struct crypto_alg *alg;
+ struct crypto_instance *inst;
+ const struct crypto_type *frontend;
+ u32 mask;
+};
+
+struct crypto_queue {
+ struct list_head list;
+ struct list_head *backlog;
+
+ unsigned int qlen;
+ unsigned int max_qlen;
+};
+
+struct scatter_walk {
+ struct scatterlist *sg;
+ unsigned int offset;
+};
+
+struct blkcipher_walk {
+ union {
+ struct {
+ struct page *page;
+ unsigned long offset;
+ } phys;
+
+ struct {
+ u8 *page;
+ u8 *addr;
+ } virt;
+ } src, dst;
+
+ struct scatter_walk in;
+ unsigned int nbytes;
+
+ struct scatter_walk out;
+ unsigned int total;
+
+ void *page;
+ u8 *buffer;
+ u8 *iv;
+ unsigned int ivsize;
+
+ int flags;
+ unsigned int walk_blocksize;
+ unsigned int cipher_blocksize;
+ unsigned int alignmask;
+};
+
+struct ablkcipher_walk {
+ struct {
+ struct page *page;
+ unsigned int offset;
+ } src, dst;
+
+ struct scatter_walk in;
+ unsigned int nbytes;
+ struct scatter_walk out;
+ unsigned int total;
+ struct list_head buffers;
+ u8 *iv_buffer;
+ u8 *iv;
+ int flags;
+ unsigned int blocksize;
+};
+
+extern const struct crypto_type crypto_ablkcipher_type;
+extern const struct crypto_type crypto_blkcipher_type;
+
+void crypto_mod_put(struct crypto_alg *alg);
+
+int crypto_register_template(struct crypto_template *tmpl);
+void crypto_unregister_template(struct crypto_template *tmpl);
+struct crypto_template *crypto_lookup_template(const char *name);
+
+int crypto_register_instance(struct crypto_template *tmpl,
+ struct crypto_instance *inst);
+int crypto_unregister_instance(struct crypto_instance *inst);
+
+int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
+ struct crypto_instance *inst, u32 mask);
+int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
+ struct crypto_instance *inst,
+ const struct crypto_type *frontend);
+int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
+ u32 type, u32 mask);
+
+void crypto_drop_spawn(struct crypto_spawn *spawn);
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+ u32 mask);
+void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
+
+static inline void crypto_set_spawn(struct crypto_spawn *spawn,
+ struct crypto_instance *inst)
+{
+ spawn->inst = inst;
+}
+
+struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
+int crypto_check_attr_type(struct rtattr **tb, u32 type);
+const char *crypto_attr_alg_name(struct rtattr *rta);
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask);
+
+static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
+ u32 type, u32 mask)
+{
+ return crypto_attr_alg2(rta, NULL, type, mask);
+}
+
+int crypto_attr_u32(struct rtattr *rta, u32 *num);
+int crypto_inst_setname(struct crypto_instance *inst, const char *name,
+ struct crypto_alg *alg);
+void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
+ unsigned int head);
+struct crypto_instance *crypto_alloc_instance(const char *name,
+ struct crypto_alg *alg);
+
+void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
+int crypto_enqueue_request(struct crypto_queue *queue,
+ struct crypto_async_request *request);
+struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
+int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
+static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
+{
+ return queue->qlen;
+}
+
+void crypto_inc(u8 *a, unsigned int size);
+void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);
+
+static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
+{
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
+ __builtin_constant_p(size) &&
+ (size % sizeof(unsigned long)) == 0) {
+ unsigned long *d = (unsigned long *)dst;
+ unsigned long *s = (unsigned long *)src;
+
+ while (size > 0) {
+ *d++ ^= *s++;
+ size -= sizeof(unsigned long);
+ }
+ } else {
+ __crypto_xor(dst, dst, src, size);
+ }
+}
+
+static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
+ unsigned int size)
+{
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
+ __builtin_constant_p(size) &&
+ (size % sizeof(unsigned long)) == 0) {
+ unsigned long *d = (unsigned long *)dst;
+ unsigned long *s1 = (unsigned long *)src1;
+ unsigned long *s2 = (unsigned long *)src2;
+
+ while (size > 0) {
+ *d++ = *s1++ ^ *s2++;
+ size -= sizeof(unsigned long);
+ }
+ } else {
+ __crypto_xor(dst, src1, src2, size);
+ }
+}
+
+int blkcipher_walk_done(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk, int err);
+int blkcipher_walk_virt(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk);
+int blkcipher_walk_phys(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk);
+int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk,
+ unsigned int blocksize);
+int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk,
+ struct crypto_aead *tfm,
+ unsigned int blocksize);
+
+int ablkcipher_walk_done(struct ablkcipher_request *req,
+ struct ablkcipher_walk *walk, int err);
+int ablkcipher_walk_phys(struct ablkcipher_request *req,
+ struct ablkcipher_walk *walk);
+void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
+
+static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
+{
+ return PTR_ALIGN(crypto_tfm_ctx(tfm),
+ crypto_tfm_alg_alignmask(tfm) + 1);
+}
+
+static inline struct crypto_instance *crypto_tfm_alg_instance(
+ struct crypto_tfm *tfm)
+{
+ return container_of(tfm->__crt_alg, struct crypto_instance, alg);
+}
+
+static inline void *crypto_instance_ctx(struct crypto_instance *inst)
+{
+ return inst->__ctx;
+}
+
+static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
+ struct crypto_ablkcipher *tfm)
+{
+ return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
+}
+
+static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_ctx_aligned(&tfm->base);
+}
+
+static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
+ struct crypto_spawn *spawn)
+{
+ u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
+ u32 mask = CRYPTO_ALG_TYPE_MASK;
+
+ return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
+static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
+{
+ return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
+{
+ return crypto_tfm_ctx_aligned(&tfm->base);
+}
+
+static inline struct crypto_cipher *crypto_spawn_cipher(
+ struct crypto_spawn *spawn)
+{
+ u32 type = CRYPTO_ALG_TYPE_CIPHER;
+ u32 mask = CRYPTO_ALG_TYPE_MASK;
+
+ return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
+static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
+{
+ return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
+}
+
+static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
+ struct scatterlist *dst,
+ struct scatterlist *src,
+ unsigned int nbytes)
+{
+ walk->in.sg = src;
+ walk->out.sg = dst;
+ walk->total = nbytes;
+}
+
+static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
+ struct scatterlist *dst,
+ struct scatterlist *src,
+ unsigned int nbytes)
+{
+ walk->in.sg = src;
+ walk->out.sg = dst;
+ walk->total = nbytes;
+ INIT_LIST_HEAD(&walk->buffers);
+}
+
+static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
+{
+ if (unlikely(!list_empty(&walk->buffers)))
+ __ablkcipher_walk_complete(walk);
+}
+
+static inline struct crypto_async_request *crypto_get_backlog(
+ struct crypto_queue *queue)
+{
+ return queue->backlog == &queue->list ? NULL :
+ container_of(queue->backlog, struct crypto_async_request, list);
+}
+
+static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
+ struct ablkcipher_request *request)
+{
+ return crypto_enqueue_request(queue, &request->base);
+}
+
+static inline struct ablkcipher_request *ablkcipher_dequeue_request(
+ struct crypto_queue *queue)
+{
+ return ablkcipher_request_cast(crypto_dequeue_request(queue));
+}
+
+static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
+{
+ return req->__ctx;
+}
+
+static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
+ struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
+}
+
+static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
+ u32 type, u32 mask)
+{
+ return crypto_attr_alg(tb[1], type, mask);
+}
+
+static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
+{
+ return (type ^ off) & mask & off;
+}
+
+/*
+ * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
+ * Otherwise returns zero.
+ */
+static inline int crypto_requires_sync(u32 type, u32 mask)
+{
+ return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
+}
+
+noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
+
+/**
+ * crypto_memneq - Compare two areas of memory without leaking
+ * timing information.
+ *
+ * @a: One area of memory
+ * @b: Another area of memory
+ * @size: The size of the area.
+ *
+ * Returns 0 when data is equal, 1 otherwise.
+ */
+static inline int crypto_memneq(const void *a, const void *b, size_t size)
+{
+ return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
+}
+
+static inline void crypto_yield(u32 flags)
+{
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
+ if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
+ cond_resched();
+#endif
+}
+
+#endif /* _CRYPTO_ALGAPI_H */