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-rw-r--r--net/sunrpc/addr.c10
-rw-r--r--net/sunrpc/clnt.c54
-rw-r--r--net/sunrpc/rpcb_clnt.c104
-rw-r--r--net/sunrpc/sunrpc_syms.c3
-rw-r--r--net/sunrpc/xprtsock.c2
5 files changed, 132 insertions, 41 deletions
diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c
index c7450c8f0a7c..6dcdd2517819 100644
--- a/net/sunrpc/addr.c
+++ b/net/sunrpc/addr.c
@@ -55,16 +55,8 @@ static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
/*
* RFC 4291, Section 2.2.1
- *
- * To keep the result as short as possible, especially
- * since we don't shorthand, we don't want leading zeros
- * in each halfword, so avoid %pI6.
*/
- return snprintf(buf, buflen, "%x:%x:%x:%x:%x:%x:%x:%x",
- ntohs(addr->s6_addr16[0]), ntohs(addr->s6_addr16[1]),
- ntohs(addr->s6_addr16[2]), ntohs(addr->s6_addr16[3]),
- ntohs(addr->s6_addr16[4]), ntohs(addr->s6_addr16[5]),
- ntohs(addr->s6_addr16[6]), ntohs(addr->s6_addr16[7]));
+ return snprintf(buf, buflen, "%pI6c", addr);
}
static size_t rpc_ntop6(const struct sockaddr *sap,
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 38829e20500b..154034b675bd 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -79,7 +79,7 @@ static void call_connect_status(struct rpc_task *task);
static __be32 *rpc_encode_header(struct rpc_task *task);
static __be32 *rpc_verify_header(struct rpc_task *task);
-static int rpc_ping(struct rpc_clnt *clnt, int flags);
+static int rpc_ping(struct rpc_clnt *clnt);
static void rpc_register_client(struct rpc_clnt *clnt)
{
@@ -340,7 +340,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
return clnt;
if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
- int err = rpc_ping(clnt, RPC_TASK_SOFT);
+ int err = rpc_ping(clnt);
if (err != 0) {
rpc_shutdown_client(clnt);
return ERR_PTR(err);
@@ -528,7 +528,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
clnt->cl_prog = program->number;
clnt->cl_vers = version->number;
clnt->cl_stats = program->stats;
- err = rpc_ping(clnt, RPC_TASK_SOFT);
+ err = rpc_ping(clnt);
if (err != 0) {
rpc_shutdown_client(clnt);
clnt = ERR_PTR(err);
@@ -1060,7 +1060,7 @@ call_bind_status(struct rpc_task *task)
goto retry_timeout;
case -EPFNOSUPPORT:
/* server doesn't support any rpcbind version we know of */
- dprintk("RPC: %5u remote rpcbind service unavailable\n",
+ dprintk("RPC: %5u unrecognized remote rpcbind service\n",
task->tk_pid);
break;
case -EPROTONOSUPPORT:
@@ -1069,6 +1069,21 @@ call_bind_status(struct rpc_task *task)
task->tk_status = 0;
task->tk_action = call_bind;
return;
+ case -ECONNREFUSED: /* connection problems */
+ case -ECONNRESET:
+ case -ENOTCONN:
+ case -EHOSTDOWN:
+ case -EHOSTUNREACH:
+ case -ENETUNREACH:
+ case -EPIPE:
+ dprintk("RPC: %5u remote rpcbind unreachable: %d\n",
+ task->tk_pid, task->tk_status);
+ if (!RPC_IS_SOFTCONN(task)) {
+ rpc_delay(task, 5*HZ);
+ goto retry_timeout;
+ }
+ status = task->tk_status;
+ break;
default:
dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
task->tk_pid, -task->tk_status);
@@ -1180,11 +1195,25 @@ static void
call_transmit_status(struct rpc_task *task)
{
task->tk_action = call_status;
+
+ /*
+ * Common case: success. Force the compiler to put this
+ * test first.
+ */
+ if (task->tk_status == 0) {
+ xprt_end_transmit(task);
+ rpc_task_force_reencode(task);
+ return;
+ }
+
switch (task->tk_status) {
case -EAGAIN:
break;
default:
+ dprint_status(task);
xprt_end_transmit(task);
+ rpc_task_force_reencode(task);
+ break;
/*
* Special cases: if we've been waiting on the
* socket's write_space() callback, or if the
@@ -1192,11 +1221,16 @@ call_transmit_status(struct rpc_task *task)
* then hold onto the transport lock.
*/
case -ECONNREFUSED:
- case -ECONNRESET:
- case -ENOTCONN:
case -EHOSTDOWN:
case -EHOSTUNREACH:
case -ENETUNREACH:
+ if (RPC_IS_SOFTCONN(task)) {
+ xprt_end_transmit(task);
+ rpc_exit(task, task->tk_status);
+ break;
+ }
+ case -ECONNRESET:
+ case -ENOTCONN:
case -EPIPE:
rpc_task_force_reencode(task);
}
@@ -1346,6 +1380,10 @@ call_timeout(struct rpc_task *task)
dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);
task->tk_timeouts++;
+ if (RPC_IS_SOFTCONN(task)) {
+ rpc_exit(task, -ETIMEDOUT);
+ return;
+ }
if (RPC_IS_SOFT(task)) {
if (clnt->cl_chatty)
printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
@@ -1675,14 +1713,14 @@ static struct rpc_procinfo rpcproc_null = {
.p_decode = rpcproc_decode_null,
};
-static int rpc_ping(struct rpc_clnt *clnt, int flags)
+static int rpc_ping(struct rpc_clnt *clnt)
{
struct rpc_message msg = {
.rpc_proc = &rpcproc_null,
};
int err;
msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0);
- err = rpc_call_sync(clnt, &msg, flags);
+ err = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN);
put_rpccred(msg.rpc_cred);
return err;
}
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index 830faf4d9997..3e3772d8eb92 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -20,6 +20,7 @@
#include <linux/in6.h>
#include <linux/kernel.h>
#include <linux/errno.h>
+#include <linux/mutex.h>
#include <net/ipv6.h>
#include <linux/sunrpc/clnt.h>
@@ -110,6 +111,9 @@ static void rpcb_getport_done(struct rpc_task *, void *);
static void rpcb_map_release(void *data);
static struct rpc_program rpcb_program;
+static struct rpc_clnt * rpcb_local_clnt;
+static struct rpc_clnt * rpcb_local_clnt4;
+
struct rpcbind_args {
struct rpc_xprt * r_xprt;
@@ -163,21 +167,60 @@ static const struct sockaddr_in rpcb_inaddr_loopback = {
.sin_port = htons(RPCBIND_PORT),
};
-static struct rpc_clnt *rpcb_create_local(struct sockaddr *addr,
- size_t addrlen, u32 version)
+static DEFINE_MUTEX(rpcb_create_local_mutex);
+
+/*
+ * Returns zero on success, otherwise a negative errno value
+ * is returned.
+ */
+static int rpcb_create_local(void)
{
struct rpc_create_args args = {
- .protocol = XPRT_TRANSPORT_UDP,
- .address = addr,
- .addrsize = addrlen,
+ .protocol = XPRT_TRANSPORT_TCP,
+ .address = (struct sockaddr *)&rpcb_inaddr_loopback,
+ .addrsize = sizeof(rpcb_inaddr_loopback),
.servername = "localhost",
.program = &rpcb_program,
- .version = version,
+ .version = RPCBVERS_2,
.authflavor = RPC_AUTH_UNIX,
.flags = RPC_CLNT_CREATE_NOPING,
};
+ struct rpc_clnt *clnt, *clnt4;
+ int result = 0;
+
+ if (rpcb_local_clnt)
+ return result;
+
+ mutex_lock(&rpcb_create_local_mutex);
+ if (rpcb_local_clnt)
+ goto out;
+
+ clnt = rpc_create(&args);
+ if (IS_ERR(clnt)) {
+ dprintk("RPC: failed to create local rpcbind "
+ "client (errno %ld).\n", PTR_ERR(clnt));
+ result = -PTR_ERR(clnt);
+ goto out;
+ }
- return rpc_create(&args);
+ /*
+ * This results in an RPC ping. On systems running portmapper,
+ * the v4 ping will fail. Proceed anyway, but disallow rpcb
+ * v4 upcalls.
+ */
+ clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
+ if (IS_ERR(clnt4)) {
+ dprintk("RPC: failed to create local rpcbind v4 "
+ "cleint (errno %ld).\n", PTR_ERR(clnt4));
+ clnt4 = NULL;
+ }
+
+ rpcb_local_clnt = clnt;
+ rpcb_local_clnt4 = clnt4;
+
+out:
+ mutex_unlock(&rpcb_create_local_mutex);
+ return result;
}
static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
@@ -209,22 +252,13 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
return rpc_create(&args);
}
-static int rpcb_register_call(const u32 version, struct rpc_message *msg)
+static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
{
- struct sockaddr *addr = (struct sockaddr *)&rpcb_inaddr_loopback;
- size_t addrlen = sizeof(rpcb_inaddr_loopback);
- struct rpc_clnt *rpcb_clnt;
int result, error = 0;
msg->rpc_resp = &result;
- rpcb_clnt = rpcb_create_local(addr, addrlen, version);
- if (!IS_ERR(rpcb_clnt)) {
- error = rpc_call_sync(rpcb_clnt, msg, 0);
- rpc_shutdown_client(rpcb_clnt);
- } else
- error = PTR_ERR(rpcb_clnt);
-
+ error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN);
if (error < 0) {
dprintk("RPC: failed to contact local rpcbind "
"server (errno %d).\n", -error);
@@ -279,6 +313,11 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
struct rpc_message msg = {
.rpc_argp = &map,
};
+ int error;
+
+ error = rpcb_create_local();
+ if (error)
+ return error;
dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
"rpcbind\n", (port ? "" : "un"),
@@ -288,7 +327,7 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
if (port)
msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
- return rpcb_register_call(RPCBVERS_2, &msg);
+ return rpcb_register_call(rpcb_local_clnt, &msg);
}
/*
@@ -313,7 +352,7 @@ static int rpcb_register_inet4(const struct sockaddr *sap,
if (port)
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
- result = rpcb_register_call(RPCBVERS_4, msg);
+ result = rpcb_register_call(rpcb_local_clnt4, msg);
kfree(map->r_addr);
return result;
}
@@ -340,7 +379,7 @@ static int rpcb_register_inet6(const struct sockaddr *sap,
if (port)
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
- result = rpcb_register_call(RPCBVERS_4, msg);
+ result = rpcb_register_call(rpcb_local_clnt4, msg);
kfree(map->r_addr);
return result;
}
@@ -356,7 +395,7 @@ static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
map->r_addr = "";
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
- return rpcb_register_call(RPCBVERS_4, msg);
+ return rpcb_register_call(rpcb_local_clnt4, msg);
}
/**
@@ -414,6 +453,13 @@ int rpcb_v4_register(const u32 program, const u32 version,
struct rpc_message msg = {
.rpc_argp = &map,
};
+ int error;
+
+ error = rpcb_create_local();
+ if (error)
+ return error;
+ if (rpcb_local_clnt4 == NULL)
+ return -EPROTONOSUPPORT;
if (address == NULL)
return rpcb_unregister_all_protofamilies(&msg);
@@ -491,7 +537,7 @@ static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbi
.rpc_message = &msg,
.callback_ops = &rpcb_getport_ops,
.callback_data = map,
- .flags = RPC_TASK_ASYNC,
+ .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
};
return rpc_run_task(&task_setup_data);
@@ -1027,3 +1073,15 @@ static struct rpc_program rpcb_program = {
.version = rpcb_version,
.stats = &rpcb_stats,
};
+
+/**
+ * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
+ *
+ */
+void cleanup_rpcb_clnt(void)
+{
+ if (rpcb_local_clnt4)
+ rpc_shutdown_client(rpcb_local_clnt4);
+ if (rpcb_local_clnt)
+ rpc_shutdown_client(rpcb_local_clnt);
+}
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 8cce92189019..f438347d817b 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -24,6 +24,8 @@
extern struct cache_detail ip_map_cache, unix_gid_cache;
+extern void cleanup_rpcb_clnt(void);
+
static int __init
init_sunrpc(void)
{
@@ -53,6 +55,7 @@ out:
static void __exit
cleanup_sunrpc(void)
{
+ cleanup_rpcb_clnt();
rpcauth_remove_module();
cleanup_socket_xprt();
svc_cleanup_xprt_sock();
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 37c5475ba258..ff312f8b018d 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2033,7 +2033,7 @@ static void xs_connect(struct rpc_task *task)
if (xprt_test_and_set_connecting(xprt))
return;
- if (transport->sock != NULL) {
+ if (transport->sock != NULL && !RPC_IS_SOFTCONN(task)) {
dprintk("RPC: xs_connect delayed xprt %p for %lu "
"seconds\n",
xprt, xprt->reestablish_timeout / HZ);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 08:07:37 +0000