[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 __rcu *	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 */

	const 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 dentry *		cl_dentry;
	struct rpc_clnt *	cl_parent;	/* Points to parent of clones */
	struct rpc_rtt		cl_rtt_default;
	struct rpc_timeout	cl_timeout_default;
	const struct rpc_program *cl_program;
	char			*cl_principal;	/* target to authenticate to */
};

/*
 * General RPC program info
 */
#define RPC_MAXVERSION		4
struct rpc_program {
	const char *		name;		/* protocol name */
	u32			number;		/* program number */
	unsigned int		nrvers;		/* number of versions */
	const struct rpc_version **	version;	/* version array */
	struct rpc_stat *	stats;		/* statistics */
	const 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 */
	const 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;
	const char		*servername;
	const 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 *,
				const 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 *);
struct rpc_clnt *rpc_clone_client_set_auth(struct rpc_clnt *,
				rpc_authflavor_t);
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(struct net *);
void		rpcb_put_local(struct net *);
int		rpcb_register(struct net *, u32, u32, int, unsigned short);
int		rpcb_v4_register(struct net *net, 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);
int		rpc_protocol(struct rpc_clnt *);
struct net *	rpc_net_ns(struct rpc_clnt *);
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);
int		rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);

size_t		rpc_ntop(const struct sockaddr *, char *, const size_t);
size_t		rpc_pton(struct net *, const char *, const size_t,
			 struct sockaddr *, const size_t);
char *		rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
size_t		rpc_uaddr2sockaddr(struct net *, 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 */
2446ab60	38	struct rpc_xprt __rcu * cl_xprt; /* transport */
1da177e4	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	43
6eac7d3f	44	const char * cl_protname; /* protocol name */
1da177e4	45	struct rpc_auth * cl_auth; /* authenticator */
11c556b3 CL	46	struct rpc_stat * cl_stats; /* per-program statistics */
11c556b3 CL	47	struct rpc_iostats * cl_metrics; /* per-client statistics */
1da177e4 LT	48
1da177e4 LT	49	unsigned int cl_softrtry : 1,/* soft timeouts */
43d78ef2	50	cl_discrtry : 1,/* disconnect before retry */
b6b6152c OK	51	cl_autobind : 1,/* use getport() */
b6b6152c OK	52	cl_chatty : 1;/* be verbose */
1da177e4 LT	53
1da177e4 LT	54	struct rpc_rtt * cl_rtt; /* RTO estimator data */
ba7392bb	55	const struct rpc_timeout cl_timeout; / Timeout strategy */
1da177e4 LT	56
	57	int cl_nodelen; /* nodename length */
	58	char cl_nodename[UNX_MAXNODENAME];
30507f58	59	struct dentry * cl_dentry;
1da177e4 LT	60	struct rpc_clnt * cl_parent; /* Points to parent of clones */
1da177e4 LT	61	struct rpc_rtt cl_rtt_default;
ba7392bb	62	struct rpc_timeout cl_timeout_default;
a613fa16	63	const struct rpc_program *cl_program;
608207e8	64	char cl_principal; / target to authenticate to */
1da177e4	65	};
1da177e4 LT	66
	67	/*
	68	* General RPC program info
	69	*/
	70	#define RPC_MAXVERSION 4
	71	struct rpc_program {
080b794c	72	const char * name; /* protocol name */
1da177e4 LT	73	u32 number; /* program number */
1da177e4 LT	74	unsigned int nrvers; /* number of versions */
a613fa16	75	const struct rpc_version ** version; /* version array */
1da177e4	76	struct rpc_stat * stats; /* statistics */
080b794c	77	const char * pipe_dir_name; /* path to rpc_pipefs dir */
1da177e4 LT	78	};
	79
	80	struct rpc_version {
	81	u32 number; /* version number */
	82	unsigned int nrprocs; /* number of procs */
	83	struct rpc_procinfo * procs; /* procedure array */
	84	};
	85
	86	/*
	87	* Procedure information
	88	*/
	89	struct rpc_procinfo {
	90	u32 p_proc; /* RPC procedure number */
9f06c719	91	kxdreproc_t p_encode; /* XDR encode function */
bf269551	92	kxdrdproc_t p_decode; /* XDR decode function */
2bea90d4 CL	93	unsigned int p_arglen; /* argument hdr length (u32) */
2bea90d4 CL	94	unsigned int p_replen; /* reply hdr length (u32) */
1da177e4 LT	95	unsigned int p_count; /* call count */
1da177e4 LT	96	unsigned int p_timer; /* Which RTT timer to use */
cc0175c1	97	u32 p_statidx; /* Which procedure to account */
6eac7d3f	98	const char * p_name; /* name of procedure */
1da177e4 LT	99	};
1da177e4 LT	100
1da177e4 LT	101	#ifdef __KERNEL__
1da177e4 LT	102
c2866763	103	struct rpc_create_args {
c653ce3f	104	struct net *net;
c2866763 CL	105	int protocol;
	106	struct sockaddr *address;
	107	size_t addrsize;
d3bc9a1d	108	struct sockaddr *saddress;
ba7392bb	109	const struct rpc_timeout *timeout;
6eac7d3f	110	const char *servername;
a613fa16	111	const struct rpc_program *program;
d5b337b4	112	u32 prognumber; /* overrides program->number */
c2866763 CL	113	u32 version;
	114	rpc_authflavor_t authflavor;
	115	unsigned long flags;
608207e8	116	char *client_name;
f300baba	117	struct svc_xprt bc_xprt; / NFSv4.1 backchannel */
c2866763 CL	118	};
	119
	120	/* Values for "flags" field */
	121	#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
c2866763	122	#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
90c5755f TM	123	#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
	124	#define RPC_CLNT_CREATE_NOPING (1UL << 4)
	125	#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
b6b6152c	126	#define RPC_CLNT_CREATE_QUIET (1UL << 6)
c2866763 CL	127
c2866763 CL	128	struct rpc_clnt rpc_create(struct rpc_create_args args);
007e251f	129	struct rpc_clnt rpc_bind_new_program(struct rpc_clnt ,
a613fa16	130	const struct rpc_program *, u32);
cbdabc7f	131	void rpc_task_reset_client(struct rpc_task task, struct rpc_clnt clnt);
1da177e4	132	struct rpc_clnt rpc_clone_client(struct rpc_clnt );
ba9b584c CL	133	struct rpc_clnt rpc_clone_client_set_auth(struct rpc_clnt ,
ba9b584c CL	134	rpc_authflavor_t);
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
f7a30c18 SK	139	int rpcb_create_local(struct net *);
f7a30c18 SK	140	void rpcb_put_local(struct net *);
977ac315 SK	141	int rpcb_register(struct net *, u32, u32, int, unsigned short);
	142	int rpcb_v4_register(struct net *net, const u32 program,
	143	const u32 version,
c2e1b09f	144	const struct sockaddr *address,
14aeb211	145	const char *netid);
45160d62	146	void rpcb_getport_async(struct rpc_task *);
1da177e4	147
77de2c59	148	void rpc_call_start(struct rpc_task *);
cbc20059 TM	149	int rpc_call_async(struct rpc_clnt *clnt,
	150	const struct rpc_message *msg, int flags,
	151	const struct rpc_call_ops *tk_ops,
963d8fe5	152	void *calldata);
cbc20059 TM	153	int rpc_call_sync(struct rpc_clnt *clnt,
cbc20059 TM	154	const struct rpc_message *msg, int flags);
5e1550d6 TM	155	struct rpc_task rpc_call_null(struct rpc_clnt clnt, struct rpc_cred *cred,
5e1550d6 TM	156	int flags);
f1f88fc7 TM	157	int rpc_restart_call_prepare(struct rpc_task *);
f1f88fc7 TM	158	int rpc_restart_call(struct rpc_task *);
1da177e4	159	void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
2446ab60 TM	160	int rpc_protocol(struct rpc_clnt *);
2446ab60 TM	161	struct net * rpc_net_ns(struct rpc_clnt *);
1da177e4	162	size_t rpc_max_payload(struct rpc_clnt *);
35f5a422	163	void rpc_force_rebind(struct rpc_clnt *);
ed39440a	164	size_t rpc_peeraddr(struct rpc_clnt , struct sockaddr , size_t);
b454ae90	165	const char rpc_peeraddr2str(struct rpc_clnt , enum rpc_display_format_t);
2e738fdc	166	int rpc_localaddr(struct rpc_clnt , struct sockaddr , size_t);
1da177e4	167
a02d6926	168	size_t rpc_ntop(const struct sockaddr , char , const size_t);
90100b17	169	size_t rpc_pton(struct net , const char , const size_t,
a02d6926	170	struct sockaddr *, const size_t);
d77385f2	171	char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
f2ac4dc9	172	size_t rpc_uaddr2sockaddr(struct net , const char , const size_t,
a02d6926 CL	173	struct sockaddr *, const size_t);
	174
	175	static inline unsigned short rpc_get_port(const struct sockaddr *sap)
	176	{
	177	switch (sap->sa_family) {
	178	case AF_INET:
	179	return ntohs(((struct sockaddr_in *)sap)->sin_port);
	180	case AF_INET6:
	181	return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
	182	}
	183	return 0;
	184	}
	185
	186	static inline void rpc_set_port(struct sockaddr *sap,
	187	const unsigned short port)
	188	{
	189	switch (sap->sa_family) {
	190	case AF_INET:
	191	((struct sockaddr_in *)sap)->sin_port = htons(port);
	192	break;
	193	case AF_INET6:
	194	((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
	195	break;
	196	}
	197	}
	198
	199	#define IPV6_SCOPE_DELIMITER '%'
	200	#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
	201
4516fc04 JL	202	static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1,
	203	const struct sockaddr *sap2)
	204	{
	205	const struct sockaddr_in sin1 = (const struct sockaddr_in )sap1;
	206	const struct sockaddr_in sin2 = (const struct sockaddr_in )sap2;
	207
	208	return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
	209	}
	210
be3ad6b0 JL	211	static inline bool __rpc_copy_addr4(struct sockaddr *dst,
	212	const struct sockaddr *src)
	213	{
	214	const struct sockaddr_in ssin = (struct sockaddr_in ) src;
	215	struct sockaddr_in dsin = (struct sockaddr_in ) dst;
	216
	217	dsin->sin_family = ssin->sin_family;
	218	dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
	219	return true;
	220	}
	221
dfd56b8b	222	#if IS_ENABLED(CONFIG_IPV6)
4516fc04 JL	223	static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
	224	const struct sockaddr *sap2)
	225	{
	226	const struct sockaddr_in6 sin1 = (const struct sockaddr_in6 )sap1;
	227	const struct sockaddr_in6 sin2 = (const struct sockaddr_in6 )sap2;
038c0159 MJ	228
	229	if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
	230	return false;
	231	else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
	232	return sin1->sin6_scope_id == sin2->sin6_scope_id;
	233
	234	return true;
4516fc04	235	}
be3ad6b0 JL	236
	237	static inline bool __rpc_copy_addr6(struct sockaddr *dst,
	238	const struct sockaddr *src)
	239	{
	240	const struct sockaddr_in6 ssin6 = (const struct sockaddr_in6 ) src;
	241	struct sockaddr_in6 dsin6 = (struct sockaddr_in6 ) dst;
	242
	243	dsin6->sin6_family = ssin6->sin6_family;
4e3fd7a0	244	dsin6->sin6_addr = ssin6->sin6_addr;
be3ad6b0 JL	245	return true;
be3ad6b0 JL	246	}
dfd56b8b	247	#else /* !(IS_ENABLED(CONFIG_IPV6) */
4516fc04 JL	248	static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
	249	const struct sockaddr *sap2)
	250	{
	251	return false;
	252	}
be3ad6b0 JL	253
	254	static inline bool __rpc_copy_addr6(struct sockaddr *dst,
	255	const struct sockaddr *src)
	256	{
	257	return false;
	258	}
dfd56b8b	259	#endif /* !(IS_ENABLED(CONFIG_IPV6) */
4516fc04 JL	260
	261	/**
	262	* rpc_cmp_addr - compare the address portion of two sockaddrs.
	263	* @sap1: first sockaddr
	264	* @sap2: second sockaddr
	265	*
	266	* Just compares the family and address portion. Ignores port, scope, etc.
	267	* Returns true if the addrs are equal, false if they aren't.
	268	*/
	269	static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
	270	const struct sockaddr *sap2)
	271	{
	272	if (sap1->sa_family == sap2->sa_family) {
	273	switch (sap1->sa_family) {
	274	case AF_INET:
	275	return __rpc_cmp_addr4(sap1, sap2);
	276	case AF_INET6:
	277	return __rpc_cmp_addr6(sap1, sap2);
	278	}
	279	}
	280	return false;
	281	}
	282
be3ad6b0 JL	283	/**
	284	* rpc_copy_addr - copy the address portion of one sockaddr to another
	285	* @dst: destination sockaddr
	286	* @src: source sockaddr
	287	*
	288	* Just copies the address portion and family. Ignores port, scope, etc.
	289	* Caller is responsible for making certain that dst is large enough to hold
	290	* the address in src. Returns true if address family is supported. Returns
	291	* false otherwise.
	292	*/
	293	static inline bool rpc_copy_addr(struct sockaddr *dst,
	294	const struct sockaddr *src)
	295	{
	296	switch (src->sa_family) {
	297	case AF_INET:
	298	return __rpc_copy_addr4(dst, src);
	299	case AF_INET6:
	300	return __rpc_copy_addr6(dst, src);
	301	}
	302	return false;
	303	}
	304
fbf4665f JL	305	/**
	306	* rpc_get_scope_id - return scopeid for a given sockaddr
	307	* @sa: sockaddr to get scopeid from
	308	*
	309	* Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
	310	* not an AF_INET6 address.
	311	*/
	312	static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
	313	{
	314	if (sa->sa_family != AF_INET6)
	315	return 0;
	316
	317	return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
	318	}
	319
1da177e4 LT	320	#endif /* __KERNEL__ */
1da177e4 LT	321	#endif /* _LINUX_SUNRPC_CLNT_H */