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Commit 9082a5cc authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Fix up delegation callbacks 



Currently, the callback server is listening on IPv6 if it is enabled. This
means that IPv4 addresses will always be mapped.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent b7391f44

fs/nfs/client.c

+38 −19
Original line number Diff line number Diff line
@@ -223,31 +223,54 @@ void nfs_put_client(struct nfs_client *clp) 
	}

}



static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1,

				 const struct sockaddr_in *sa2)

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)

static const struct in6_addr *nfs_map_ipv4_addr(const struct sockaddr *sa, struct in6_addr *addr_mapped)

{

	return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr;

	switch (sa->sa_family) {

		default:

			return NULL;

		case AF_INET6:

			return &((const struct sockaddr_in6 *)sa)->sin6_addr;

			break;

		case AF_INET:

			ipv6_addr_set_v4mapped(((const struct sockaddr_in *)sa)->sin_addr.s_addr,

					addr_mapped);

			return addr_mapped;

	}

}



static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1,

				 const struct sockaddr_in6 *sa2)

static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,

		const struct sockaddr *sa2)

{

	const struct in6_addr *addr1;

	const struct in6_addr *addr2;

	struct in6_addr addr1_mapped;

	struct in6_addr addr2_mapped;



	addr1 = nfs_map_ipv4_addr(sa1, &addr1_mapped);

	if (likely(addr1 != NULL)) {

		addr2 = nfs_map_ipv4_addr(sa2, &addr2_mapped);

		if (likely(addr2 != NULL))

			return ipv6_addr_equal(addr1, addr2);

	}

	return 0;

}

#else

static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1,

				 const struct sockaddr_in *sa2)

{

	return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr);

	return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr;

}



static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,

				 const struct sockaddr *sa2)

{

	switch (sa1->sa_family) {

	case AF_INET:

	if (unlikely(sa1->sa_family != AF_INET || sa2->sa_family != AF_INET))

		return 0;

	return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1,

			(const struct sockaddr_in *)sa2);

	case AF_INET6:

		return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1,

				(const struct sockaddr_in6 *)sa2);

	}

	BUG();

}

#endif



/*

 * Find a client by IP address and protocol version
@@ -269,8 +292,6 @@ struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) 
		if (clp->rpc_ops->version != nfsversion)

			continue;



		if (addr->sa_family != clap->sa_family)

			continue;

		/* Match only the IP address, not the port number */

		if (!nfs_sockaddr_match_ipaddr(addr, clap))

			continue;
@@ -304,8 +325,6 @@ struct nfs_client *nfs_find_client_next(struct nfs_client *clp) 
		if (clp->rpc_ops->version != nfsvers)

			continue;



		if (sap->sa_family != clap->sa_family)

			continue;

		/* Match only the IP address, not the port number */

		if (!nfs_sockaddr_match_ipaddr(sap, clap))

			continue;