From 9082a5cc1e33d081f091f54e6ed69a0628a4bdcc Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 23 Dec 2008 15:21:53 -0500 Subject: 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: Trond Myklebust --- fs/nfs/client.c | 57 ++++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 38 insertions(+), 19 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index b643f0ec5c21..9b728f3565a1 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -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: - 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(); + 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); } +#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; -- cgit v1.2.3