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Commit 6bfbe8af authored by Chuck Lever's avatar Chuck Lever Committed by J. Bruce Fields
Browse files

lockd: Adjust nlmsvc_lookup_host() to accomodate AF_INET6 addresses 



Fix up nlmsvc_lookup_host() to pass AF_INET6 source addresses to
nlm_lookup_host().

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent d7d20440

fs/lockd/host.c

+38 −9
Original line number Diff line number Diff line
@@ -304,16 +304,33 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, 
	return nlm_lookup_host(&ni);

}



/*

 * Find an NLM client handle in the cache. If there is none, create it.

/**

 * nlmsvc_lookup_host - Find an NLM host handle matching a remote client

 * @rqstp: incoming NLM request

 * @hostname: name of client host

 * @hostname_len: length of client hostname

 *

 * Returns an nlm_host structure that matches the [client address,

 * transport protocol, NLM version, client hostname] of the passed-in

 * NLM request.  If one doesn't already exist in the host cache, a

 * new handle is created and returned.

 *

 * Before possibly creating a new nlm_host, construct a sockaddr

 * for a specific source address in case the local system has

 * multiple network addresses.  The family of the address in

 * rq_daddr is guaranteed to be the same as the family of the

 * address in rq_addr, so it's safe to use the same family for

 * the source address.

 */

struct nlm_host *

nlmsvc_lookup_host(struct svc_rqst *rqstp,

			const char *hostname, unsigned int hostname_len)

struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp,

				    const char *hostname,

				    const size_t hostname_len)

{

	const struct sockaddr_in source = {

	struct sockaddr_in sin = {

		.sin_family	= AF_INET,

		.sin_addr	= rqstp->rq_daddr.addr,

	};

	struct sockaddr_in6 sin6 = {

		.sin6_family	= AF_INET6,

	};

	struct nlm_lookup_host_info ni = {

		.server		= 1,
@@ -323,14 +340,26 @@ nlmsvc_lookup_host(struct svc_rqst *rqstp, 
		.version	= rqstp->rq_vers,

		.hostname	= hostname,

		.hostname_len	= hostname_len,

		.src_sap	= (struct sockaddr *)&source,

		.src_len	= sizeof(source),

		.src_len	= rqstp->rq_addrlen,

	};



	dprintk("lockd: %s(host='%*s', vers=%u, proto=%s)\n", __func__,

			(int)hostname_len, hostname, rqstp->rq_vers,

			(rqstp->rq_prot == IPPROTO_UDP ? "udp" : "tcp"));



	switch (ni.sap->sa_family) {

	case AF_INET:

		sin.sin_addr.s_addr = rqstp->rq_daddr.addr.s_addr;

		ni.src_sap = (struct sockaddr *)&sin;

		break;

	case AF_INET6:

		ipv6_addr_copy(&sin6.sin6_addr, &rqstp->rq_daddr.addr6);

		ni.src_sap = (struct sockaddr *)&sin6;

		break;

	default:

		return NULL;

	}



	return nlm_lookup_host(&ni);

}

include/linux/lockd/lockd.h

+3 −2
Original line number Diff line number Diff line
@@ -220,8 +220,9 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, 
					const unsigned short protocol,

					const u32 version,

					const char *hostname);

struct nlm_host  *nlmsvc_lookup_host(struct svc_rqst *, const char *,

					unsigned int);

struct nlm_host  *nlmsvc_lookup_host(const struct svc_rqst *rqstp,

					const char *hostname,

					const size_t hostname_len);

struct rpc_clnt * nlm_bind_host(struct nlm_host *);

void		  nlm_rebind_host(struct nlm_host *);

struct nlm_host * nlm_get_host(struct nlm_host *);