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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: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2006-08-22 20:06:17 -04:00 committed by Trond Myklebust
parent bbf7c1dd2a
commit ed39440a25
2 changed files with 22 additions and 0 deletions
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1
include/linux/sunrpc/clnt.h
View File

@ -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

21
net/sunrpc/clnt.c
View File

@ -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)
{