}
#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)
+/*
+ * Test if two ip6 socket addresses refer to the same socket by
+ * comparing relevant fields. The padding bytes specifically, are not
+ * compared. sin6_flowinfo is not compared because it only affects QoS
+ * and sin6_scope_id is only compared if the address is "link local"
+ * because "link local" addresses need only be unique to a specific
+ * link. Conversely, ordinary unicast addresses might have different
+ * sin6_scope_id.
+ *
+ * The caller should ensure both socket addresses are AF_INET6.
+ */
+static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
{
- 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;
- }
-}
+ const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
+ const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
-static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
- const struct sockaddr *sa2)
+ if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL &&
+ sin1->sin6_scope_id != sin2->sin6_scope_id)
+ return 0;
+
+ return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr);
+}
+#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
+static int nfs_sockaddr_match_ipaddr6(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)
+#endif
+
+/*
+ * Test if two ip4 socket addresses refer to the same socket, by
+ * comparing relevant fields. The padding bytes specifically, are
+ * not compared.
+ *
+ * The caller should ensure both socket addresses are AF_INET.
+ */
+static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
{
- return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr;
+ const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
+ const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
+
+ return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
+}
+
+static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
+ const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
+
+ return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
+ (sin1->sin6_port == sin2->sin6_port);
}
+static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
+ const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
+
+ return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
+ (sin1->sin_port == sin2->sin_port);
+}
+
+/*
+ * Test if two socket addresses represent the same actual socket,
+ * by comparing (only) relevant fields, excluding the port number.
+ */
static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
- const struct sockaddr *sa2)
+ const struct sockaddr *sa2)
{
- if (unlikely(sa1->sa_family != AF_INET || sa2->sa_family != AF_INET))
+ if (sa1->sa_family != sa2->sa_family)
return 0;
- return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1,
- (const struct sockaddr_in *)sa2);
+
+ switch (sa1->sa_family) {
+ case AF_INET:
+ return nfs_sockaddr_match_ipaddr4(sa1, sa2);
+ case AF_INET6:
+ return nfs_sockaddr_match_ipaddr6(sa1, sa2);
+ }
+ return 0;
+}
+
+/*
+ * Test if two socket addresses represent the same actual socket,
+ * by comparing (only) relevant fields, including the port number.
+ */
+static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ if (sa1->sa_family != sa2->sa_family)
+ return 0;
+
+ switch (sa1->sa_family) {
+ case AF_INET:
+ return nfs_sockaddr_cmp_ip4(sa1, sa2);
+ case AF_INET6:
+ return nfs_sockaddr_cmp_ip6(sa1, sa2);
+ }
+ return 0;
}
-#endif
/*
* Find a client by IP address and protocol version
static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
{
struct nfs_client *clp;
+ const struct sockaddr *sap = data->addr;
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+ const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
/* Don't match clients that failed to initialise properly */
if (clp->cl_cons_state < 0)
continue;
continue;
/* Match the full socket address */
- if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0)
+ if (!nfs_sockaddr_cmp(sap, clap))
continue;
atomic_inc(&clp->cl_count);
if (!proc_fs_nfs)
goto error_0;
- proc_fs_nfs->owner = THIS_MODULE;
-
/* a file of servers with which we're dealing */
p = proc_create("servers", S_IFREG|S_IRUGO,
proc_fs_nfs, &nfs_server_list_fops);
projects / linux-2.6-microblaze.git / blobdiff