[deliverable/linux.git] / include / linux / sunrpc / clnt.h

/*
 *  linux/include/linux/sunrpc/clnt.h
 *
 *  Declarations for the high-level RPC client interface
 *
 *  Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
 */

#ifndef _LINUX_SUNRPC_CLNT_H
#define _LINUX_SUNRPC_CLNT_H

#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>

#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xprt.h>
#include <linux/sunrpc/auth.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/timer.h>
#include <asm/signal.h>
#include <linux/path.h>
#include <net/ipv6.h>

struct rpc_inode;

/*
 * The high-level client handle
 */
struct rpc_clnt {
	atomic_t		cl_count;	/* Number of references */
	struct list_head	cl_clients;	/* Global list of clients */
	struct list_head	cl_tasks;	/* List of tasks */
	spinlock_t		cl_lock;	/* spinlock */
	struct rpc_xprt *	cl_xprt;	/* transport */
	struct rpc_procinfo *	cl_procinfo;	/* procedure info */
	u32			cl_prog,	/* RPC program number */
				cl_vers,	/* RPC version number */
				cl_maxproc;	/* max procedure number */

	char *			cl_server;	/* server machine name */
	char *			cl_protname;	/* protocol name */
	struct rpc_auth *	cl_auth;	/* authenticator */
	struct rpc_stat *	cl_stats;	/* per-program statistics */
	struct rpc_iostats *	cl_metrics;	/* per-client statistics */

	unsigned int		cl_softrtry : 1,/* soft timeouts */
				cl_discrtry : 1,/* disconnect before retry */
				cl_autobind : 1,/* use getport() */
				cl_chatty   : 1;/* be verbose */

	struct rpc_rtt *	cl_rtt;		/* RTO estimator data */
	const struct rpc_timeout *cl_timeout;	/* Timeout strategy */

	int			cl_nodelen;	/* nodename length */
	char 			cl_nodename[UNX_MAXNODENAME];
	struct path		cl_path;
	struct rpc_clnt *	cl_parent;	/* Points to parent of clones */
	struct rpc_rtt		cl_rtt_default;
	struct rpc_timeout	cl_timeout_default;
	struct rpc_program *	cl_program;
	char			cl_inline_name[32];
	char			*cl_principal;	/* target to authenticate to */
};

/*
 * General RPC program info
 */
#define RPC_MAXVERSION		4
struct rpc_program {
	char *			name;		/* protocol name */
	u32			number;		/* program number */
	unsigned int		nrvers;		/* number of versions */
	struct rpc_version **	version;	/* version array */
	struct rpc_stat *	stats;		/* statistics */
	char *			pipe_dir_name;	/* path to rpc_pipefs dir */
};

struct rpc_version {
	u32			number;		/* version number */
	unsigned int		nrprocs;	/* number of procs */
	struct rpc_procinfo *	procs;		/* procedure array */
};

/*
 * Procedure information
 */
struct rpc_procinfo {
	u32			p_proc;		/* RPC procedure number */
	kxdreproc_t		p_encode;	/* XDR encode function */
	kxdrdproc_t		p_decode;	/* XDR decode function */
	unsigned int		p_arglen;	/* argument hdr length (u32) */
	unsigned int		p_replen;	/* reply hdr length (u32) */
	unsigned int		p_count;	/* call count */
	unsigned int		p_timer;	/* Which RTT timer to use */
	u32			p_statidx;	/* Which procedure to account */
	char *			p_name;		/* name of procedure */
};

#ifdef __KERNEL__

struct rpc_create_args {
	struct net		*net;
	int			protocol;
	struct sockaddr		*address;
	size_t			addrsize;
	struct sockaddr		*saddress;
	const struct rpc_timeout *timeout;
	char			*servername;
	struct rpc_program	*program;
	u32			prognumber;	/* overrides program->number */
	u32			version;
	rpc_authflavor_t	authflavor;
	unsigned long		flags;
	char			*client_name;
	struct svc_xprt		*bc_xprt;	/* NFSv4.1 backchannel */
};

/* Values for "flags" field */
#define RPC_CLNT_CREATE_HARDRTRY	(1UL << 0)
#define RPC_CLNT_CREATE_AUTOBIND	(1UL << 2)
#define RPC_CLNT_CREATE_NONPRIVPORT	(1UL << 3)
#define RPC_CLNT_CREATE_NOPING		(1UL << 4)
#define RPC_CLNT_CREATE_DISCRTRY	(1UL << 5)
#define RPC_CLNT_CREATE_QUIET		(1UL << 6)

struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,
				struct rpc_program *, u32);
void rpc_task_reset_client(struct rpc_task *task, struct rpc_clnt *clnt);
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
void		rpc_shutdown_client(struct rpc_clnt *);
void		rpc_release_client(struct rpc_clnt *);
void		rpc_task_release_client(struct rpc_task *);

int		rpcb_create_local(void);
void		rpcb_put_local(void);
int		rpcb_register(u32, u32, int, unsigned short);
int		rpcb_v4_register(const u32 program, const u32 version,
				 const struct sockaddr *address,
				 const char *netid);
void		rpcb_getport_async(struct rpc_task *);

void		rpc_call_start(struct rpc_task *);
int		rpc_call_async(struct rpc_clnt *clnt,
			       const struct rpc_message *msg, int flags,
			       const struct rpc_call_ops *tk_ops,
			       void *calldata);
int		rpc_call_sync(struct rpc_clnt *clnt,
			      const struct rpc_message *msg, int flags);
struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
			       int flags);
int		rpc_restart_call_prepare(struct rpc_task *);
int		rpc_restart_call(struct rpc_task *);
void		rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
size_t		rpc_max_payload(struct rpc_clnt *);
void		rpc_force_rebind(struct rpc_clnt *);
size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
const char	*rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);

size_t		rpc_ntop(const struct sockaddr *, char *, const size_t);
size_t		rpc_pton(const char *, const size_t,
			 struct sockaddr *, const size_t);
char *		rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
size_t		rpc_uaddr2sockaddr(const char *, const size_t,
				   struct sockaddr *, const size_t);

static inline unsigned short rpc_get_port(const struct sockaddr *sap)
{
	switch (sap->sa_family) {
	case AF_INET:
		return ntohs(((struct sockaddr_in *)sap)->sin_port);
	case AF_INET6:
		return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
	}
	return 0;
}

static inline void rpc_set_port(struct sockaddr *sap,
				const unsigned short port)
{
	switch (sap->sa_family) {
	case AF_INET:
		((struct sockaddr_in *)sap)->sin_port = htons(port);
		break;
	case AF_INET6:
		((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
		break;
	}
}

#define IPV6_SCOPE_DELIMITER		'%'
#define IPV6_SCOPE_ID_LEN		sizeof("%nnnnnnnnnn")

static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1,
				   const struct sockaddr *sap2)
{
	const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1;
	const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2;

	return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
}

static inline bool __rpc_copy_addr4(struct sockaddr *dst,
				    const struct sockaddr *src)
{
	const struct sockaddr_in *ssin = (struct sockaddr_in *) src;
	struct sockaddr_in *dsin = (struct sockaddr_in *) dst;

	dsin->sin_family = ssin->sin_family;
	dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
	return true;
}

#if IS_ENABLED(CONFIG_IPV6)
static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
				   const struct sockaddr *sap2)
{
	const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1;
	const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;

	if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
		return false;
	else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
		return sin1->sin6_scope_id == sin2->sin6_scope_id;

	return true;
}

static inline bool __rpc_copy_addr6(struct sockaddr *dst,
				    const struct sockaddr *src)
{
	const struct sockaddr_in6 *ssin6 = (const struct sockaddr_in6 *) src;
	struct sockaddr_in6 *dsin6 = (struct sockaddr_in6 *) dst;

	dsin6->sin6_family = ssin6->sin6_family;
	dsin6->sin6_addr = ssin6->sin6_addr;
	return true;
}
#else	/* !(IS_ENABLED(CONFIG_IPV6) */
static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
				   const struct sockaddr *sap2)
{
	return false;
}

static inline bool __rpc_copy_addr6(struct sockaddr *dst,
				    const struct sockaddr *src)
{
	return false;
}
#endif	/* !(IS_ENABLED(CONFIG_IPV6) */

/**
 * rpc_cmp_addr - compare the address portion of two sockaddrs.
 * @sap1: first sockaddr
 * @sap2: second sockaddr
 *
 * Just compares the family and address portion. Ignores port, scope, etc.
 * Returns true if the addrs are equal, false if they aren't.
 */
static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
				const struct sockaddr *sap2)
{
	if (sap1->sa_family == sap2->sa_family) {
		switch (sap1->sa_family) {
		case AF_INET:
			return __rpc_cmp_addr4(sap1, sap2);
		case AF_INET6:
			return __rpc_cmp_addr6(sap1, sap2);
		}
	}
	return false;
}

/**
 * rpc_copy_addr - copy the address portion of one sockaddr to another
 * @dst: destination sockaddr
 * @src: source sockaddr
 *
 * Just copies the address portion and family. Ignores port, scope, etc.
 * Caller is responsible for making certain that dst is large enough to hold
 * the address in src. Returns true if address family is supported. Returns
 * false otherwise.
 */
static inline bool rpc_copy_addr(struct sockaddr *dst,
				 const struct sockaddr *src)
{
	switch (src->sa_family) {
	case AF_INET:
		return __rpc_copy_addr4(dst, src);
	case AF_INET6:
		return __rpc_copy_addr6(dst, src);
	}
	return false;
}

/**
 * rpc_get_scope_id - return scopeid for a given sockaddr
 * @sa: sockaddr to get scopeid from
 *
 * Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
 * not an AF_INET6 address.
 */
static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
{
	if (sa->sa_family != AF_INET6)
		return 0;

	return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
}

#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/sunrpc/clnt.h
	3	*
	4	* Declarations for the high-level RPC client interface
	5	*
	6	* Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#ifndef _LINUX_SUNRPC_CLNT_H
	10	#define _LINUX_SUNRPC_CLNT_H
	11
d77385f2	12	#include <linux/types.h>
a02d6926 CL	13	#include <linux/socket.h>
	14	#include <linux/in.h>
	15	#include <linux/in6.h>
	16
1da177e4 LT	17	#include <linux/sunrpc/msg_prot.h>
	18	#include <linux/sunrpc/sched.h>
	19	#include <linux/sunrpc/xprt.h>
	20	#include <linux/sunrpc/auth.h>
	21	#include <linux/sunrpc/stats.h>
	22	#include <linux/sunrpc/xdr.h>
	23	#include <linux/sunrpc/timer.h>
	24	#include <asm/signal.h>
7d217cac	25	#include <linux/path.h>
4516fc04	26	#include <net/ipv6.h>
1da177e4	27
1da177e4 LT	28	struct rpc_inode;
	29
	30	/*
	31	* The high-level client handle
	32	*/
	33	struct rpc_clnt {
006abe88	34	atomic_t cl_count; /* Number of references */
6529eba0 TM	35	struct list_head cl_clients; /* Global list of clients */
6529eba0 TM	36	struct list_head cl_tasks; /* List of tasks */
4bef61ff	37	spinlock_t cl_lock; /* spinlock */
1da177e4 LT	38	struct rpc_xprt * cl_xprt; /* transport */
1da177e4 LT	39	struct rpc_procinfo * cl_procinfo; /* procedure info */
4a68179d CL	40	u32 cl_prog, /* RPC program number */
	41	cl_vers, /* RPC version number */
	42	cl_maxproc; /* max procedure number */
1da177e4 LT	43
	44	char * cl_server; /* server machine name */
	45	char * cl_protname; /* protocol name */
	46	struct rpc_auth * cl_auth; /* authenticator */
11c556b3 CL	47	struct rpc_stat * cl_stats; /* per-program statistics */
11c556b3 CL	48	struct rpc_iostats * cl_metrics; /* per-client statistics */
1da177e4 LT	49
1da177e4 LT	50	unsigned int cl_softrtry : 1,/* soft timeouts */
43d78ef2	51	cl_discrtry : 1,/* disconnect before retry */
b6b6152c OK	52	cl_autobind : 1,/* use getport() */
b6b6152c OK	53	cl_chatty : 1;/* be verbose */
1da177e4 LT	54
1da177e4 LT	55	struct rpc_rtt * cl_rtt; /* RTO estimator data */
ba7392bb	56	const struct rpc_timeout cl_timeout; / Timeout strategy */
1da177e4 LT	57
	58	int cl_nodelen; /* nodename length */
	59	char cl_nodename[UNX_MAXNODENAME];
7d217cac	60	struct path cl_path;
1da177e4 LT	61	struct rpc_clnt * cl_parent; /* Points to parent of clones */
1da177e4 LT	62	struct rpc_rtt cl_rtt_default;
ba7392bb	63	struct rpc_timeout cl_timeout_default;
3e32a5d9	64	struct rpc_program * cl_program;
1da177e4	65	char cl_inline_name[32];
608207e8	66	char cl_principal; / target to authenticate to */
1da177e4	67	};
1da177e4 LT	68
	69	/*
	70	* General RPC program info
	71	*/
	72	#define RPC_MAXVERSION 4
	73	struct rpc_program {
	74	char * name; /* protocol name */
	75	u32 number; /* program number */
	76	unsigned int nrvers; /* number of versions */
	77	struct rpc_version ** version; /* version array */
	78	struct rpc_stat * stats; /* statistics */
	79	char * pipe_dir_name; /* path to rpc_pipefs dir */
	80	};
	81
	82	struct rpc_version {
	83	u32 number; /* version number */
	84	unsigned int nrprocs; /* number of procs */
	85	struct rpc_procinfo * procs; /* procedure array */
	86	};
	87
	88	/*
	89	* Procedure information
	90	*/
	91	struct rpc_procinfo {
	92	u32 p_proc; /* RPC procedure number */
9f06c719	93	kxdreproc_t p_encode; /* XDR encode function */
bf269551	94	kxdrdproc_t p_decode; /* XDR decode function */
2bea90d4 CL	95	unsigned int p_arglen; /* argument hdr length (u32) */
2bea90d4 CL	96	unsigned int p_replen; /* reply hdr length (u32) */
1da177e4 LT	97	unsigned int p_count; /* call count */
1da177e4 LT	98	unsigned int p_timer; /* Which RTT timer to use */
cc0175c1 CL	99	u32 p_statidx; /* Which procedure to account */
cc0175c1 CL	100	char * p_name; /* name of procedure */
1da177e4 LT	101	};
1da177e4 LT	102
1da177e4 LT	103	#ifdef __KERNEL__
1da177e4 LT	104
c2866763	105	struct rpc_create_args {
c653ce3f	106	struct net *net;
c2866763 CL	107	int protocol;
	108	struct sockaddr *address;
	109	size_t addrsize;
d3bc9a1d	110	struct sockaddr *saddress;
ba7392bb	111	const struct rpc_timeout *timeout;
c2866763 CL	112	char *servername;
c2866763 CL	113	struct rpc_program *program;
d5b337b4	114	u32 prognumber; /* overrides program->number */
c2866763 CL	115	u32 version;
	116	rpc_authflavor_t authflavor;
	117	unsigned long flags;
608207e8	118	char *client_name;
f300baba	119	struct svc_xprt bc_xprt; / NFSv4.1 backchannel */
c2866763 CL	120	};
	121
	122	/* Values for "flags" field */
	123	#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
c2866763	124	#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
90c5755f TM	125	#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
	126	#define RPC_CLNT_CREATE_NOPING (1UL << 4)
	127	#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
b6b6152c	128	#define RPC_CLNT_CREATE_QUIET (1UL << 6)
c2866763 CL	129
c2866763 CL	130	struct rpc_clnt rpc_create(struct rpc_create_args args);
007e251f	131	struct rpc_clnt rpc_bind_new_program(struct rpc_clnt ,
89eb21c3	132	struct rpc_program *, u32);
cbdabc7f	133	void rpc_task_reset_client(struct rpc_task task, struct rpc_clnt clnt);
1da177e4	134	struct rpc_clnt rpc_clone_client(struct rpc_clnt );
4c402b40	135	void rpc_shutdown_client(struct rpc_clnt *);
1da177e4	136	void rpc_release_client(struct rpc_clnt *);
58f9612c	137	void rpc_task_release_client(struct rpc_task *);
cce63cd6	138
d9908560 SK	139	int rpcb_create_local(void);
d9908560 SK	140	void rpcb_put_local(void);
14aeb211	141	int rpcb_register(u32, u32, int, unsigned short);
c2e1b09f CL	142	int rpcb_v4_register(const u32 program, const u32 version,
c2e1b09f CL	143	const struct sockaddr *address,
14aeb211	144	const char *netid);
45160d62	145	void rpcb_getport_async(struct rpc_task *);
1da177e4	146
77de2c59	147	void rpc_call_start(struct rpc_task *);
cbc20059 TM	148	int rpc_call_async(struct rpc_clnt *clnt,
	149	const struct rpc_message *msg, int flags,
	150	const struct rpc_call_ops *tk_ops,
963d8fe5	151	void *calldata);
cbc20059 TM	152	int rpc_call_sync(struct rpc_clnt *clnt,
cbc20059 TM	153	const struct rpc_message *msg, int flags);
5e1550d6 TM	154	struct rpc_task rpc_call_null(struct rpc_clnt clnt, struct rpc_cred *cred,
5e1550d6 TM	155	int flags);
f1f88fc7 TM	156	int rpc_restart_call_prepare(struct rpc_task *);
f1f88fc7 TM	157	int rpc_restart_call(struct rpc_task *);
1da177e4 LT	158	void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
1da177e4 LT	159	size_t rpc_max_payload(struct rpc_clnt *);
35f5a422	160	void rpc_force_rebind(struct rpc_clnt *);
ed39440a	161	size_t rpc_peeraddr(struct rpc_clnt , struct sockaddr , size_t);
b454ae90	162	const char rpc_peeraddr2str(struct rpc_clnt , enum rpc_display_format_t);
1da177e4	163
a02d6926 CL	164	size_t rpc_ntop(const struct sockaddr , char , const size_t);
	165	size_t rpc_pton(const char *, const size_t,
	166	struct sockaddr *, const size_t);
d77385f2	167	char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
a02d6926 CL	168	size_t rpc_uaddr2sockaddr(const char *, const size_t,
	169	struct sockaddr *, const size_t);
	170
	171	static inline unsigned short rpc_get_port(const struct sockaddr *sap)
	172	{
	173	switch (sap->sa_family) {
	174	case AF_INET:
	175	return ntohs(((struct sockaddr_in *)sap)->sin_port);
	176	case AF_INET6:
	177	return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
	178	}
	179	return 0;
	180	}
	181
	182	static inline void rpc_set_port(struct sockaddr *sap,
	183	const unsigned short port)
	184	{
	185	switch (sap->sa_family) {
	186	case AF_INET:
	187	((struct sockaddr_in *)sap)->sin_port = htons(port);
	188	break;
	189	case AF_INET6:
	190	((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
	191	break;
	192	}
	193	}
	194
	195	#define IPV6_SCOPE_DELIMITER '%'
	196	#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
	197
4516fc04 JL	198	static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1,
	199	const struct sockaddr *sap2)
	200	{
	201	const struct sockaddr_in sin1 = (const struct sockaddr_in )sap1;
	202	const struct sockaddr_in sin2 = (const struct sockaddr_in )sap2;
	203
	204	return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
	205	}
	206
be3ad6b0 JL	207	static inline bool __rpc_copy_addr4(struct sockaddr *dst,
	208	const struct sockaddr *src)
	209	{
	210	const struct sockaddr_in ssin = (struct sockaddr_in ) src;
	211	struct sockaddr_in dsin = (struct sockaddr_in ) dst;
	212
	213	dsin->sin_family = ssin->sin_family;
	214	dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
	215	return true;
	216	}
	217
dfd56b8b	218	#if IS_ENABLED(CONFIG_IPV6)
4516fc04 JL	219	static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
	220	const struct sockaddr *sap2)
	221	{
	222	const struct sockaddr_in6 sin1 = (const struct sockaddr_in6 )sap1;
	223	const struct sockaddr_in6 sin2 = (const struct sockaddr_in6 )sap2;
038c0159 MJ	224
	225	if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
	226	return false;
	227	else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
	228	return sin1->sin6_scope_id == sin2->sin6_scope_id;
	229
	230	return true;
4516fc04	231	}
be3ad6b0 JL	232
	233	static inline bool __rpc_copy_addr6(struct sockaddr *dst,
	234	const struct sockaddr *src)
	235	{
	236	const struct sockaddr_in6 ssin6 = (const struct sockaddr_in6 ) src;
	237	struct sockaddr_in6 dsin6 = (struct sockaddr_in6 ) dst;
	238
	239	dsin6->sin6_family = ssin6->sin6_family;
4e3fd7a0	240	dsin6->sin6_addr = ssin6->sin6_addr;
be3ad6b0 JL	241	return true;
be3ad6b0 JL	242	}
dfd56b8b	243	#else /* !(IS_ENABLED(CONFIG_IPV6) */
4516fc04 JL	244	static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
	245	const struct sockaddr *sap2)
	246	{
	247	return false;
	248	}
be3ad6b0 JL	249
	250	static inline bool __rpc_copy_addr6(struct sockaddr *dst,
	251	const struct sockaddr *src)
	252	{
	253	return false;
	254	}
dfd56b8b	255	#endif /* !(IS_ENABLED(CONFIG_IPV6) */
4516fc04 JL	256
	257	/**
	258	* rpc_cmp_addr - compare the address portion of two sockaddrs.
	259	* @sap1: first sockaddr
	260	* @sap2: second sockaddr
	261	*
	262	* Just compares the family and address portion. Ignores port, scope, etc.
	263	* Returns true if the addrs are equal, false if they aren't.
	264	*/
	265	static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
	266	const struct sockaddr *sap2)
	267	{
	268	if (sap1->sa_family == sap2->sa_family) {
	269	switch (sap1->sa_family) {
	270	case AF_INET:
	271	return __rpc_cmp_addr4(sap1, sap2);
	272	case AF_INET6:
	273	return __rpc_cmp_addr6(sap1, sap2);
	274	}
	275	}
	276	return false;
	277	}
	278
be3ad6b0 JL	279	/**
	280	* rpc_copy_addr - copy the address portion of one sockaddr to another
	281	* @dst: destination sockaddr
	282	* @src: source sockaddr
	283	*
	284	* Just copies the address portion and family. Ignores port, scope, etc.
	285	* Caller is responsible for making certain that dst is large enough to hold
	286	* the address in src. Returns true if address family is supported. Returns
	287	* false otherwise.
	288	*/
	289	static inline bool rpc_copy_addr(struct sockaddr *dst,
	290	const struct sockaddr *src)
	291	{
	292	switch (src->sa_family) {
	293	case AF_INET:
	294	return __rpc_copy_addr4(dst, src);
	295	case AF_INET6:
	296	return __rpc_copy_addr6(dst, src);
	297	}
	298	return false;
	299	}
	300
fbf4665f JL	301	/**
	302	* rpc_get_scope_id - return scopeid for a given sockaddr
	303	* @sa: sockaddr to get scopeid from
	304	*
	305	* Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
	306	* not an AF_INET6 address.
	307	*/
	308	static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
	309	{
	310	if (sa->sa_family != AF_INET6)
	311	return 0;
	312
	313	return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
	314	}
	315
1da177e4 LT	316	#endif /* __KERNEL__ */
1da177e4 LT	317	#endif /* _LINUX_SUNRPC_CLNT_H */