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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/sunrpc/svc.h
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@@ -109,7 +109,7 @@
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 	spinlock_t		sv_cb_lock;	/* protects the svc_cb_list */
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 	wait_queue_head_t	sv_cb_waitq;	/* sleep here if there are no
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 						 * entries in the svc_cb_list */
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-	struct svc_xprt		*sv_bc_xprt;	/* callback on fore channel */
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+	bool			sv_bc_enabled;	/* service uses backchannel */
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 #endif /* CONFIG_SUNRPC_BACKCHANNEL */
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 };
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@@ -254,6 +254,7 @@
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 	struct page *		*rq_page_end;  /* one past the last page */
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 	struct kvec		rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
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+	struct bio_vec		rq_bvec[RPCSVC_MAXPAGES];
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 	__be32			rq_xid;		/* transmission id */
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 	u32			rq_prog;	/* program number */
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@@ -299,6 +300,7 @@
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 	struct net		*rq_bc_net;	/* pointer to backchannel's
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 						 * net namespace
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 						 */
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+	void **			rq_lease_breaker; /* The v4 client breaking a lease */
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 };
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 #define SVC_NET(rqst) (rqst->rq_xprt ? rqst->rq_xprt->xpt_net : rqst->rq_bc_net)
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@@ -380,7 +382,17 @@
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 	struct cache_deferred_req handle;
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 	size_t			xprt_hlen;
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 	int			argslen;
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-	__be32			args[0];
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+	__be32			args[];
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+};
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+
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+struct svc_process_info {
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+	union {
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+		int  (*dispatch)(struct svc_rqst *, __be32 *);
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+		struct {
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+			unsigned int lovers;
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+			unsigned int hivers;
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+		} mismatch;
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+	};
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 };
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 /*
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@@ -397,6 +409,14 @@
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 	char *			pg_class;	/* class name: services sharing authentication */
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 	struct svc_stat *	pg_stats;	/* rpc statistics */
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 	int			(*pg_authenticate)(struct svc_rqst *);
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+	__be32			(*pg_init_request)(struct svc_rqst *,
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+						   const struct svc_program *,
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+						   struct svc_process_info *);
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+	int			(*pg_rpcbind_set)(struct net *net,
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+						  const struct svc_program *,
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+						  u32 version, int family,
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+						  unsigned short proto,
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+						  unsigned short port);
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 };
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 /*
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@@ -499,6 +519,9 @@
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 void		   svc_reserve(struct svc_rqst *rqstp, int space);
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 struct svc_pool *  svc_pool_for_cpu(struct svc_serv *serv, int cpu);
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 char *		   svc_print_addr(struct svc_rqst *, char *, size_t);
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+int		   svc_encode_read_payload(struct svc_rqst *rqstp,
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+					   unsigned int offset,
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+					   unsigned int length);
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 unsigned int	   svc_fill_write_vector(struct svc_rqst *rqstp,
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 					 struct page **pages,
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 					 struct kvec *first, size_t total);
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@@ -506,6 +529,19 @@
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 					     struct kvec *first, void *p,
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 					     size_t total);
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 __be32		   svc_return_autherr(struct svc_rqst *rqstp, __be32 auth_err);
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+__be32		   svc_generic_init_request(struct svc_rqst *rqstp,
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+					    const struct svc_program *progp,
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+					    struct svc_process_info *procinfo);
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+int		   svc_generic_rpcbind_set(struct net *net,
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+					   const struct svc_program *progp,
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+					   u32 version, int family,
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+					   unsigned short proto,
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+					   unsigned short port);
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+int		   svc_rpcbind_set_version(struct net *net,
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+					   const struct svc_program *progp,
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+					   u32 version, int family,
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+					   unsigned short proto,
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+					   unsigned short port);
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 #define	RPC_MAX_ADDRBUFLEN	(63U)
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