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Commit ed39440a authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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SUNRPC: create API for getting remote peer address 



Provide an API for retrieving the remote peer address without allowing
direct access to the rpc_xprt struct.

Test-plan:
Compile kernel with CONFIG_NFS enabled.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent bbf7c1dd

include/linux/sunrpc/clnt.h

+1 −0
Original line number Diff line number Diff line
@@ -123,6 +123,7 @@ 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 *);

int		rpc_ping(struct rpc_clnt *clnt, int flags);

size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);



/*

 * Helper function for NFSroot support

net/sunrpc/clnt.c

+21 −0
Original line number Diff line number Diff line
@@ -533,6 +533,27 @@ rpc_call_setup(struct rpc_task *task, struct rpc_message *msg, int flags) 
		task->tk_action = rpc_exit_task;

}



/**

 * rpc_peeraddr - extract remote peer address from clnt's xprt

 * @clnt: RPC client structure

 * @buf: target buffer

 * @size: length of target buffer

 *

 * Returns the number of bytes that are actually in the stored address.

 */

size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize)

{

	size_t bytes;

	struct rpc_xprt *xprt = clnt->cl_xprt;



	bytes = sizeof(xprt->addr);

	if (bytes > bufsize)

		bytes = bufsize;

	memcpy(buf, &clnt->cl_xprt->addr, bytes);

	return sizeof(xprt->addr);

}

EXPORT_SYMBOL(rpc_peeraddr);



void

rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize)

{