Commit cf619507 authored by Jeff Layton's avatar Jeff Layton Committed by Chuck Lever
Browse files

SUNRPC: add a new svc_find_listener helper 



svc_find_listener will return the transport instance pointer for the
endpoint accepting connections/peer traffic from the specified transport
class and matching sockaddr.

Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent a79ec2ae

include/linux/sunrpc/svc_xprt.h

+2 −0
Original line number Diff line number Diff line
@@ -150,6 +150,8 @@ void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt); 
void	svc_xprt_close(struct svc_xprt *xprt);

int	svc_port_is_privileged(struct sockaddr *sin);

int	svc_print_xprts(char *buf, int maxlen);

struct svc_xprt *svc_find_listener(struct svc_serv *serv, const char *xcl_name,

				   struct net *net, const struct sockaddr *sa);

struct	svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,

			struct net *net, const sa_family_t af,

			const unsigned short port);

net/sunrpc/svc_xprt.c

+34 −0
Original line number Diff line number Diff line
@@ -1276,6 +1276,40 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt) 
	return dr;

}



/**

 * svc_find_listener - find an RPC transport instance

 * @serv: pointer to svc_serv to search

 * @xcl_name: C string containing transport's class name

 * @net: owner net pointer

 * @sa: sockaddr containing address

 *

 * Return the transport instance pointer for the endpoint accepting

 * connections/peer traffic from the specified transport class,

 * and matching sockaddr.

 */

struct svc_xprt *svc_find_listener(struct svc_serv *serv, const char *xcl_name,

				   struct net *net, const struct sockaddr *sa)

{

	struct svc_xprt *xprt;

	struct svc_xprt *found = NULL;



	spin_lock_bh(&serv->sv_lock);

	list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) {

		if (xprt->xpt_net != net)

			continue;

		if (strcmp(xprt->xpt_class->xcl_name, xcl_name))

			continue;

		if (!rpc_cmp_addr_port(sa, (struct sockaddr *)&xprt->xpt_local))

			continue;

		found = xprt;

		svc_xprt_get(xprt);

		break;

	}

	spin_unlock_bh(&serv->sv_lock);

	return found;

}

EXPORT_SYMBOL_GPL(svc_find_listener);



/**

 * svc_find_xprt - find an RPC transport instance

 * @serv: pointer to svc_serv to search