Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * if_alg: User-space algorithm interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #ifndef _CRYPTO_IF_ALG_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #define _CRYPTO_IF_ALG_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/if_alg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <crypto/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <crypto/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define ALG_MAX_PAGES			16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) struct crypto_async_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) struct alg_sock {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	/* struct sock must be the first member of struct alg_sock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct sock sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct sock *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	atomic_t refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	atomic_t nokey_refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	const struct af_alg_type *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	void *private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) struct af_alg_control {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct af_alg_iv *iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	int op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	unsigned int aead_assoclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) struct af_alg_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	void *(*bind)(const char *name, u32 type, u32 mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	void (*release)(void *private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	int (*setkey)(void *private, const u8 *key, unsigned int keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	int (*setentropy)(void *private, sockptr_t entropy, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	int (*accept)(void *private, struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	int (*accept_nokey)(void *private, struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int (*setauthsize)(void *private, unsigned int authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct proto_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct proto_ops *ops_nokey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct module *owner;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	char name[14];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) struct af_alg_sgl {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct scatterlist sg[ALG_MAX_PAGES + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct page *pages[ALG_MAX_PAGES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned int npages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) /* TX SGL entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) struct af_alg_tsgl {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	unsigned int cur;		/* Last processed SG entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct scatterlist sg[];	/* Array of SGs forming the SGL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) #define MAX_SGL_ENTS ((4096 - sizeof(struct af_alg_tsgl)) / \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		      sizeof(struct scatterlist) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) /* RX SGL entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) struct af_alg_rsgl {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	struct af_alg_sgl sgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	size_t sg_num_bytes;		/* Bytes of data in that SGL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * struct af_alg_async_req - definition of crypto request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * @iocb:		IOCB for AIO operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * @sk:			Socket the request is associated with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * @first_rsgl:		First RX SG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * @last_rsgl:		Pointer to last RX SG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * @rsgl_list:		Track RX SGs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * @tsgl:		Private, per request TX SGL of buffers to process
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * @tsgl_entries:	Number of entries in priv. TX SGL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * @outlen:		Number of output bytes generated by crypto op
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * @areqlen:		Length of this data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * @cra_u:		Cipher request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) struct af_alg_async_req {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct kiocb *iocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct af_alg_rsgl first_rsgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct af_alg_rsgl *last_rsgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct list_head rsgl_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct scatterlist *tsgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	unsigned int tsgl_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	unsigned int outlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	unsigned int areqlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		struct aead_request aead_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		struct skcipher_request skcipher_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	} cra_u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* req ctx trails this struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  * struct af_alg_ctx - definition of the crypto context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  * The crypto context tracks the input data during the lifetime of an AF_ALG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  * @tsgl_list:		Link to TX SGL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  * @iv:			IV for cipher operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  * @aead_assoclen:	Length of AAD for AEAD cipher operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  * @completion:		Work queue for synchronous operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  * @used:		TX bytes sent to kernel. This variable is used to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  *			ensure that user space cannot cause the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  *			to allocate too much memory in sendmsg operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  * @rcvused:		Total RX bytes to be filled by kernel. This variable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  *			is used to ensure user space cannot cause the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  *			to allocate too much memory in a recvmsg operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * @more:		More data to be expected from user space?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  * @merge:		Shall new data from user space be merged into existing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)  *			SG?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)  * @enc:		Cryptographic operation to be performed when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)  *			recvmsg is invoked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)  * @init:		True if metadata has been sent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)  * @len:		Length of memory allocated for this data structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct af_alg_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct list_head tsgl_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	void *iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	size_t aead_assoclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	struct crypto_wait wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	size_t used;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	atomic_t rcvused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	bool more;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	bool merge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	bool enc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	bool init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int af_alg_register_type(const struct af_alg_type *type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int af_alg_unregister_type(const struct af_alg_type *type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) int af_alg_release(struct socket *sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) void af_alg_release_parent(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) int af_alg_accept(struct sock *sk, struct socket *newsock, bool kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) void af_alg_free_sg(struct af_alg_sgl *sgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static inline struct alg_sock *alg_sk(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return (struct alg_sock *)sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  * Size of available buffer for sending data from user space to kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * @sk socket of connection to user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  * @return number of bytes still available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static inline int af_alg_sndbuf(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	struct alg_sock *ask = alg_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct af_alg_ctx *ctx = ask->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return max_t(int, max_t(int, sk->sk_sndbuf & PAGE_MASK, PAGE_SIZE) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			  ctx->used, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)  * Can the send buffer still be written to?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)  * @sk socket of connection to user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)  * @return true => writable, false => not writable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static inline bool af_alg_writable(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	return PAGE_SIZE <= af_alg_sndbuf(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * Size of available buffer used by kernel for the RX user space operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)  * @sk socket of connection to user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)  * @return number of bytes still available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static inline int af_alg_rcvbuf(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct alg_sock *ask = alg_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	struct af_alg_ctx *ctx = ask->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	return max_t(int, max_t(int, sk->sk_rcvbuf & PAGE_MASK, PAGE_SIZE) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		     atomic_read(&ctx->rcvused), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)  * Can the RX buffer still be written to?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  * @sk socket of connection to user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  * @return true => writable, false => not writable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static inline bool af_alg_readable(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return PAGE_SIZE <= af_alg_rcvbuf(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) unsigned int af_alg_count_tsgl(struct sock *sk, size_t bytes, size_t offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) void af_alg_pull_tsgl(struct sock *sk, size_t used, struct scatterlist *dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		      size_t dst_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) void af_alg_wmem_wakeup(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) int af_alg_wait_for_data(struct sock *sk, unsigned flags, unsigned min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		   unsigned int ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ssize_t af_alg_sendpage(struct socket *sock, struct page *page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			int offset, size_t size, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) void af_alg_free_resources(struct af_alg_async_req *areq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void af_alg_async_cb(struct crypto_async_request *_req, int err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) __poll_t af_alg_poll(struct file *file, struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			 poll_table *wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 					   unsigned int areqlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int af_alg_get_rsgl(struct sock *sk, struct msghdr *msg, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		    struct af_alg_async_req *areq, size_t maxsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		    size_t *outlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #endif	/* _CRYPTO_IF_ALG_H */