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-rw-r--r--net/sunrpc/svc.c158
1 files changed, 72 insertions, 86 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index bb507e2bb94d..9f2f2412a2f3 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -359,7 +359,7 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
*/
static struct svc_serv *
__svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
- sa_family_t family, void (*shutdown)(struct svc_serv *serv))
+ void (*shutdown)(struct svc_serv *serv))
{
struct svc_serv *serv;
unsigned int vers;
@@ -368,7 +368,6 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
if (!(serv = kzalloc(sizeof(*serv), GFP_KERNEL)))
return NULL;
- serv->sv_family = family;
serv->sv_name = prog->pg_name;
serv->sv_program = prog;
serv->sv_nrthreads = 1;
@@ -427,21 +426,21 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
struct svc_serv *
svc_create(struct svc_program *prog, unsigned int bufsize,
- sa_family_t family, void (*shutdown)(struct svc_serv *serv))
+ void (*shutdown)(struct svc_serv *serv))
{
- return __svc_create(prog, bufsize, /*npools*/1, family, shutdown);
+ return __svc_create(prog, bufsize, /*npools*/1, shutdown);
}
EXPORT_SYMBOL_GPL(svc_create);
struct svc_serv *
svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
- sa_family_t family, void (*shutdown)(struct svc_serv *serv),
+ void (*shutdown)(struct svc_serv *serv),
svc_thread_fn func, struct module *mod)
{
struct svc_serv *serv;
unsigned int npools = svc_pool_map_get();
- serv = __svc_create(prog, bufsize, npools, family, shutdown);
+ serv = __svc_create(prog, bufsize, npools, shutdown);
if (serv != NULL) {
serv->sv_function = func;
@@ -719,8 +718,6 @@ svc_exit_thread(struct svc_rqst *rqstp)
}
EXPORT_SYMBOL_GPL(svc_exit_thread);
-#ifdef CONFIG_SUNRPC_REGISTER_V4
-
/*
* Register an "inet" protocol family netid with the local
* rpcbind daemon via an rpcbind v4 SET request.
@@ -735,12 +732,13 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
const unsigned short protocol,
const unsigned short port)
{
- struct sockaddr_in sin = {
+ const struct sockaddr_in sin = {
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_ANY),
.sin_port = htons(port),
};
- char *netid;
+ const char *netid;
+ int error;
switch (protocol) {
case IPPROTO_UDP:
@@ -750,13 +748,23 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
netid = RPCBIND_NETID_TCP;
break;
default:
- return -EPROTONOSUPPORT;
+ return -ENOPROTOOPT;
}
- return rpcb_v4_register(program, version,
- (struct sockaddr *)&sin, netid);
+ error = rpcb_v4_register(program, version,
+ (const struct sockaddr *)&sin, netid);
+
+ /*
+ * User space didn't support rpcbind v4, so retry this
+ * registration request with the legacy rpcbind v2 protocol.
+ */
+ if (error == -EPROTONOSUPPORT)
+ error = rpcb_register(program, version, protocol, port);
+
+ return error;
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
/*
* Register an "inet6" protocol family netid with the local
* rpcbind daemon via an rpcbind v4 SET request.
@@ -771,12 +779,13 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
const unsigned short protocol,
const unsigned short port)
{
- struct sockaddr_in6 sin6 = {
+ const struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_ANY_INIT,
.sin6_port = htons(port),
};
- char *netid;
+ const char *netid;
+ int error;
switch (protocol) {
case IPPROTO_UDP:
@@ -786,12 +795,22 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
netid = RPCBIND_NETID_TCP6;
break;
default:
- return -EPROTONOSUPPORT;
+ return -ENOPROTOOPT;
}
- return rpcb_v4_register(program, version,
- (struct sockaddr *)&sin6, netid);
+ error = rpcb_v4_register(program, version,
+ (const struct sockaddr *)&sin6, netid);
+
+ /*
+ * User space didn't support rpcbind version 4, so we won't
+ * use a PF_INET6 listener.
+ */
+ if (error == -EPROTONOSUPPORT)
+ error = -EAFNOSUPPORT;
+
+ return error;
}
+#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
/*
* Register a kernel RPC service via rpcbind version 4.
@@ -799,69 +818,43 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
* Returns zero on success; a negative errno value is returned
* if any error occurs.
*/
-static int __svc_register(const u32 program, const u32 version,
- const sa_family_t family,
+static int __svc_register(const char *progname,
+ const u32 program, const u32 version,
+ const int family,
const unsigned short protocol,
const unsigned short port)
{
- int error;
+ int error = -EAFNOSUPPORT;
switch (family) {
- case AF_INET:
- return __svc_rpcb_register4(program, version,
+ case PF_INET:
+ error = __svc_rpcb_register4(program, version,
protocol, port);
- case AF_INET6:
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
error = __svc_rpcb_register6(program, version,
protocol, port);
- if (error < 0)
- return error;
-
- /*
- * Work around bug in some versions of Linux rpcbind
- * which don't allow registration of both inet and
- * inet6 netids.
- *
- * Error return ignored for now.
- */
- __svc_rpcb_register4(program, version,
- protocol, port);
- return 0;
+#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
}
- return -EAFNOSUPPORT;
-}
-
-#else /* CONFIG_SUNRPC_REGISTER_V4 */
-
-/*
- * Register a kernel RPC service via rpcbind version 2.
- *
- * Returns zero on success; a negative errno value is returned
- * if any error occurs.
- */
-static int __svc_register(const u32 program, const u32 version,
- sa_family_t family,
- const unsigned short protocol,
- const unsigned short port)
-{
- if (family != AF_INET)
- return -EAFNOSUPPORT;
-
- return rpcb_register(program, version, protocol, port);
+ if (error < 0)
+ printk(KERN_WARNING "svc: failed to register %sv%u RPC "
+ "service (errno %d).\n", progname, version, -error);
+ return error;
}
-#endif /* CONFIG_SUNRPC_REGISTER_V4 */
-
/**
* svc_register - register an RPC service with the local portmapper
* @serv: svc_serv struct for the service to register
+ * @family: protocol family of service's listener socket
* @proto: transport protocol number to advertise
* @port: port to advertise
*
- * Service is registered for any address in serv's address family
+ * Service is registered for any address in the passed-in protocol family
*/
-int svc_register(const struct svc_serv *serv, const unsigned short proto,
- const unsigned short port)
+int svc_register(const struct svc_serv *serv, const int family,
+ const unsigned short proto, const unsigned short port)
{
struct svc_program *progp;
unsigned int i;
@@ -879,15 +872,15 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
i,
proto == IPPROTO_UDP? "udp" : "tcp",
port,
- serv->sv_family,
+ family,
progp->pg_vers[i]->vs_hidden?
" (but not telling portmap)" : "");
if (progp->pg_vers[i]->vs_hidden)
continue;
- error = __svc_register(progp->pg_prog, i,
- serv->sv_family, proto, port);
+ error = __svc_register(progp->pg_name, progp->pg_prog,
+ i, family, proto, port);
if (error < 0)
break;
}
@@ -896,38 +889,31 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
return error;
}
-#ifdef CONFIG_SUNRPC_REGISTER_V4
-
+/*
+ * If user space is running rpcbind, it should take the v4 UNSET
+ * and clear everything for this [program, version]. If user space
+ * is running portmap, it will reject the v4 UNSET, but won't have
+ * any "inet6" entries anyway. So a PMAP_UNSET should be sufficient
+ * in this case to clear all existing entries for [program, version].
+ */
static void __svc_unregister(const u32 program, const u32 version,
const char *progname)
{
- struct sockaddr_in6 sin6 = {
- .sin6_family = AF_INET6,
- .sin6_addr = IN6ADDR_ANY_INIT,
- .sin6_port = 0,
- };
int error;
- error = rpcb_v4_register(program, version,
- (struct sockaddr *)&sin6, "");
- dprintk("svc: %s(%sv%u), error %d\n",
- __func__, progname, version, error);
-}
-
-#else /* CONFIG_SUNRPC_REGISTER_V4 */
+ error = rpcb_v4_register(program, version, NULL, "");
-static void __svc_unregister(const u32 program, const u32 version,
- const char *progname)
-{
- int error;
+ /*
+ * User space didn't support rpcbind v4, so retry this
+ * request with the legacy rpcbind v2 protocol.
+ */
+ if (error == -EPROTONOSUPPORT)
+ error = rpcb_register(program, version, 0, 0);
- error = rpcb_register(program, version, 0, 0);
dprintk("svc: %s(%sv%u), error %d\n",
__func__, progname, version, error);
}
-#endif /* CONFIG_SUNRPC_REGISTER_V4 */
-
/*
* All netids, bind addresses and ports registered for [program, version]
* are removed from the local rpcbind database (if the service is not
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 13:27:58 +0100