#include <linux/in6.h>
#include <linux/kernel.h>
#include <linux/errno.h>
+#include <net/ipv6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
#define RPCBIND_PROGRAM (100000u)
#define RPCBIND_PORT (111u)
+#define RPCBVERS_2 (2u)
+#define RPCBVERS_3 (3u)
+#define RPCBVERS_4 (4u)
+
enum {
RPCBPROC_NULL,
RPCBPROC_SET,
#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
static void rpcb_getport_done(struct rpc_task *, void *);
+static void rpcb_map_release(void *data);
static struct rpc_program rpcb_program;
struct rpcbind_args {
const char * r_netid;
const char * r_addr;
const char * r_owner;
+
+ int r_status;
};
static struct rpc_procinfo rpcb_procedures2[];
static struct rpc_procinfo rpcb_procedures3[];
+static struct rpc_procinfo rpcb_procedures4[];
struct rpcb_info {
- int rpc_vers;
+ u32 rpc_vers;
struct rpc_procinfo * rpc_proc;
};
static struct rpcb_info rpcb_next_version[];
static struct rpcb_info rpcb_next_version6[];
+static const struct rpc_call_ops rpcb_getport_ops = {
+ .rpc_call_done = rpcb_getport_done,
+ .rpc_release = rpcb_map_release,
+};
+
+static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
+{
+ xprt_clear_binding(xprt);
+ rpc_wake_up_status(&xprt->binding, status);
+}
+
static void rpcb_map_release(void *data)
{
struct rpcbind_args *map = data;
+ rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
xprt_put(map->r_xprt);
kfree(map);
}
-static const struct rpc_call_ops rpcb_getport_ops = {
- .rpc_call_done = rpcb_getport_done,
- .rpc_release = rpcb_map_release,
+static const struct sockaddr_in rpcb_inaddr_loopback = {
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
+ .sin_port = htons(RPCBIND_PORT),
};
-static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
+static const struct sockaddr_in6 rpcb_in6addr_loopback = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6ADDR_LOOPBACK_INIT,
+ .sin6_port = htons(RPCBIND_PORT),
+};
+
+static struct rpc_clnt *rpcb_create_local(struct sockaddr *addr,
+ size_t addrlen, u32 version)
{
- xprt_clear_binding(xprt);
- rpc_wake_up_status(&xprt->binding, status);
+ struct rpc_create_args args = {
+ .protocol = XPRT_TRANSPORT_UDP,
+ .address = addr,
+ .addrsize = addrlen,
+ .servername = "localhost",
+ .program = &rpcb_program,
+ .version = version,
+ .authflavor = RPC_AUTH_UNIX,
+ .flags = RPC_CLNT_CREATE_NOPING,
+ };
+
+ return rpc_create(&args);
}
static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
- size_t salen, int proto, u32 version,
- int privileged)
+ size_t salen, int proto, u32 version)
{
struct rpc_create_args args = {
.protocol = proto,
.program = &rpcb_program,
.version = version,
.authflavor = RPC_AUTH_UNIX,
- .flags = RPC_CLNT_CREATE_NOPING,
+ .flags = (RPC_CLNT_CREATE_NOPING |
+ RPC_CLNT_CREATE_NONPRIVPORT),
};
switch (srvaddr->sa_family) {
return NULL;
}
- if (!privileged)
- args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
return rpc_create(&args);
}
+static int rpcb_register_call(struct sockaddr *addr, size_t addrlen,
+ u32 version, struct rpc_message *msg)
+{
+ 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);
+
+ if (error < 0) {
+ printk(KERN_WARNING "RPC: failed to contact local rpcbind "
+ "server (errno %d).\n", -error);
+ return error;
+ }
+
+ if (!result) {
+ dprintk("RPC: registration failed\n");
+ return -EACCES;
+ }
+
+ dprintk("RPC: registration succeeded\n");
+ return 0;
+}
+
/**
* rpcb_register - set or unset a port registration with the local rpcbind svc
* @prog: RPC program number to bind
* @vers: RPC version number to bind
- * @prot: transport protocol to use to make this request
+ * @prot: transport protocol to register
* @port: port value to register
- * @okay: result code
*
- * port == 0 means unregister, port != 0 means register.
+ * Returns zero if the registration request was dispatched successfully
+ * and the rpcbind daemon returned success. Otherwise, returns an errno
+ * value that reflects the nature of the error (request could not be
+ * dispatched, timed out, or rpcbind returned an error).
*
- * This routine supports only rpcbind version 2.
+ * RPC services invoke this function to advertise their contact
+ * information via the system's rpcbind daemon. RPC services
+ * invoke this function once for each [program, version, transport]
+ * tuple they wish to advertise.
+ *
+ * Callers may also unregister RPC services that are no longer
+ * available by setting the passed-in port to zero. This removes
+ * all registered transports for [program, version] from the local
+ * rpcbind database.
+ *
+ * This function uses rpcbind protocol version 2 to contact the
+ * local rpcbind daemon.
+ *
+ * Registration works over both AF_INET and AF_INET6, and services
+ * registered via this function are advertised as available for any
+ * address. If the local rpcbind daemon is listening on AF_INET6,
+ * services registered via this function will be advertised on
+ * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
+ * addresses).
*/
-int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
+int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
{
- struct sockaddr_in sin = {
- .sin_family = AF_INET,
- .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
- };
struct rpcbind_args map = {
.r_prog = prog,
.r_vers = vers,
.r_port = port,
};
struct rpc_message msg = {
- .rpc_proc = &rpcb_procedures2[port ?
- RPCBPROC_SET : RPCBPROC_UNSET],
.rpc_argp = &map,
- .rpc_resp = okay,
};
- struct rpc_clnt *rpcb_clnt;
- int error = 0;
dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
"rpcbind\n", (port ? "" : "un"),
prog, vers, prot, port);
- rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
- sizeof(sin), XPRT_TRANSPORT_UDP, 2, 1);
- if (IS_ERR(rpcb_clnt))
- return PTR_ERR(rpcb_clnt);
+ msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
+ if (port)
+ msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
- error = rpc_call_sync(rpcb_clnt, &msg, 0);
+ return rpcb_register_call((struct sockaddr *)&rpcb_inaddr_loopback,
+ sizeof(rpcb_inaddr_loopback),
+ RPCBVERS_2, &msg);
+}
- rpc_shutdown_client(rpcb_clnt);
- if (error < 0)
- printk(KERN_WARNING "RPC: failed to contact local rpcbind "
- "server (errno %d).\n", -error);
- dprintk("RPC: registration status %d/%d\n", error, *okay);
+/*
+ * Fill in AF_INET family-specific arguments to register
+ */
+static int rpcb_register_netid4(struct sockaddr_in *address_to_register,
+ struct rpc_message *msg)
+{
+ struct rpcbind_args *map = msg->rpc_argp;
+ unsigned short port = ntohs(address_to_register->sin_port);
+ char buf[32];
+
+ /* Construct AF_INET universal address */
+ snprintf(buf, sizeof(buf),
+ NIPQUAD_FMT".%u.%u",
+ NIPQUAD(address_to_register->sin_addr.s_addr),
+ port >> 8, port & 0xff);
+ map->r_addr = buf;
+
+ dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
+ "local rpcbind\n", (port ? "" : "un"),
+ map->r_prog, map->r_vers,
+ map->r_addr, map->r_netid);
+
+ msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
+ if (port)
+ msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
+
+ return rpcb_register_call((struct sockaddr *)&rpcb_inaddr_loopback,
+ sizeof(rpcb_inaddr_loopback),
+ RPCBVERS_4, msg);
+}
- return error;
+/*
+ * Fill in AF_INET6 family-specific arguments to register
+ */
+static int rpcb_register_netid6(struct sockaddr_in6 *address_to_register,
+ struct rpc_message *msg)
+{
+ struct rpcbind_args *map = msg->rpc_argp;
+ unsigned short port = ntohs(address_to_register->sin6_port);
+ char buf[64];
+
+ /* Construct AF_INET6 universal address */
+ if (ipv6_addr_any(&address_to_register->sin6_addr))
+ snprintf(buf, sizeof(buf), "::.%u.%u",
+ port >> 8, port & 0xff);
+ else
+ snprintf(buf, sizeof(buf), NIP6_FMT".%u.%u",
+ NIP6(address_to_register->sin6_addr),
+ port >> 8, port & 0xff);
+ map->r_addr = buf;
+
+ dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
+ "local rpcbind\n", (port ? "" : "un"),
+ map->r_prog, map->r_vers,
+ map->r_addr, map->r_netid);
+
+ msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
+ if (port)
+ msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
+
+ return rpcb_register_call((struct sockaddr *)&rpcb_in6addr_loopback,
+ sizeof(rpcb_in6addr_loopback),
+ RPCBVERS_4, msg);
+}
+
+/**
+ * rpcb_v4_register - set or unset a port registration with the local rpcbind
+ * @program: RPC program number of service to (un)register
+ * @version: RPC version number of service to (un)register
+ * @address: address family, IP address, and port to (un)register
+ * @netid: netid of transport protocol to (un)register
+ *
+ * Returns zero if the registration request was dispatched successfully
+ * and the rpcbind daemon returned success. Otherwise, returns an errno
+ * value that reflects the nature of the error (request could not be
+ * dispatched, timed out, or rpcbind returned an error).
+ *
+ * RPC services invoke this function to advertise their contact
+ * information via the system's rpcbind daemon. RPC services
+ * invoke this function once for each [program, version, address,
+ * netid] tuple they wish to advertise.
+ *
+ * Callers may also unregister RPC services that are no longer
+ * available by setting the port number in the passed-in address
+ * to zero. Callers pass a netid of "" to unregister all
+ * transport netids associated with [program, version, address].
+ *
+ * This function uses rpcbind protocol version 4 to contact the
+ * local rpcbind daemon. The local rpcbind daemon must support
+ * version 4 of the rpcbind protocol in order for these functions
+ * to register a service successfully.
+ *
+ * Supported netids include "udp" and "tcp" for UDP and TCP over
+ * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
+ * respectively.
+ *
+ * The contents of @address determine the address family and the
+ * port to be registered. The usual practice is to pass INADDR_ANY
+ * as the raw address, but specifying a non-zero address is also
+ * supported by this API if the caller wishes to advertise an RPC
+ * service on a specific network interface.
+ *
+ * Note that passing in INADDR_ANY does not create the same service
+ * registration as IN6ADDR_ANY. The former advertises an RPC
+ * service on any IPv4 address, but not on IPv6. The latter
+ * advertises the service on all IPv4 and IPv6 addresses.
+ */
+int rpcb_v4_register(const u32 program, const u32 version,
+ const struct sockaddr *address, const char *netid)
+{
+ struct rpcbind_args map = {
+ .r_prog = program,
+ .r_vers = version,
+ .r_netid = netid,
+ .r_owner = RPCB_OWNER_STRING,
+ };
+ struct rpc_message msg = {
+ .rpc_argp = &map,
+ };
+
+ switch (address->sa_family) {
+ case AF_INET:
+ return rpcb_register_netid4((struct sockaddr_in *)address,
+ &msg);
+ case AF_INET6:
+ return rpcb_register_netid6((struct sockaddr_in6 *)address,
+ &msg);
+ }
+
+ return -EAFNOSUPPORT;
}
/**
__func__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
- sizeof(*sin), prot, 2, 0);
+ sizeof(*sin), prot, RPCBVERS_2);
if (IS_ERR(rpcb_clnt))
return PTR_ERR(rpcb_clnt);
}
EXPORT_SYMBOL_GPL(rpcb_getport_sync);
-static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, int version)
+static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
{
struct rpc_message msg = {
- .rpc_proc = rpcb_next_version[version].rpc_proc,
+ .rpc_proc = proc,
.rpc_argp = map,
.rpc_resp = &map->r_port,
};
void rpcb_getport_async(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
+ struct rpc_procinfo *proc;
u32 bind_version;
struct rpc_xprt *xprt = task->tk_xprt;
struct rpc_clnt *rpcb_clnt;
struct sockaddr *sap = (struct sockaddr *)&addr;
size_t salen;
int status;
- struct rpcb_info *info;
dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
task->tk_pid, __func__,
/* Autobind on cloned rpc clients is discouraged */
BUG_ON(clnt->cl_parent != clnt);
+ /* Put self on the wait queue to ensure we get notified if
+ * some other task is already attempting to bind the port */
+ rpc_sleep_on(&xprt->binding, task, NULL);
+
if (xprt_test_and_set_binding(xprt)) {
- status = -EAGAIN; /* tell caller to check again */
dprintk("RPC: %5u %s: waiting for another binder\n",
task->tk_pid, __func__);
- goto bailout_nowake;
+ return;
}
- /* Put self on queue before sending rpcbind request, in case
- * rpcb_getport_done completes before we return from rpc_run_task */
- rpc_sleep_on(&xprt->binding, task, NULL);
-
/* Someone else may have bound if we slept */
if (xprt_bound(xprt)) {
status = 0;
/* Don't ever use rpcbind v2 for AF_INET6 requests */
switch (sap->sa_family) {
case AF_INET:
- info = rpcb_next_version;
+ proc = rpcb_next_version[xprt->bind_index].rpc_proc;
+ bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
break;
case AF_INET6:
- info = rpcb_next_version6;
+ proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
+ bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
break;
default:
status = -EAFNOSUPPORT;
task->tk_pid, __func__);
goto bailout_nofree;
}
- if (info[xprt->bind_index].rpc_proc == NULL) {
+ if (proc == NULL) {
xprt->bind_index = 0;
status = -EPFNOSUPPORT;
dprintk("RPC: %5u %s: no more getport versions available\n",
task->tk_pid, __func__);
goto bailout_nofree;
}
- bind_version = info[xprt->bind_index].rpc_vers;
dprintk("RPC: %5u %s: trying rpcbind version %u\n",
task->tk_pid, __func__, bind_version);
rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
- bind_version, 0);
+ bind_version);
if (IS_ERR(rpcb_clnt)) {
status = PTR_ERR(rpcb_clnt);
dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR);
map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
+ map->r_status = -EIO;
- child = rpcb_call_async(rpcb_clnt, map, xprt->bind_index);
+ child = rpcb_call_async(rpcb_clnt, map, proc);
rpc_release_client(rpcb_clnt);
if (IS_ERR(child)) {
- status = -EIO;
/* rpcb_map_release() has freed the arguments */
dprintk("RPC: %5u %s: rpc_run_task failed\n",
task->tk_pid, __func__);
- goto bailout_nofree;
+ return;
}
rpc_put_task(child);
bailout_nofree:
rpcb_wake_rpcbind_waiters(xprt, status);
-bailout_nowake:
task->tk_status = status;
}
EXPORT_SYMBOL_GPL(rpcb_getport_async);
dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
child->tk_pid, status, map->r_port);
- rpcb_wake_rpcbind_waiters(xprt, status);
+ map->r_status = status;
}
+/*
+ * XDR functions for rpcbind
+ */
+
static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
struct rpcbind_args *rpcb)
{
unsigned short *portp)
{
*portp = (unsigned short) ntohl(*p++);
- dprintk("RPC: rpcb_decode_getport result %u\n",
+ dprintk("RPC: rpcb_decode_getport result %u\n",
*portp);
return 0;
}
unsigned int *boolp)
{
*boolp = (unsigned int) ntohl(*p++);
- dprintk("RPC: rpcb_decode_set result %u\n",
- *boolp);
+ dprintk("RPC: rpcb_decode_set: call %s\n",
+ (*boolp ? "succeeded" : "failed"));
return 0;
}
static struct rpc_procinfo rpcb_procedures2[] = {
PROC(SET, mapping, set),
PROC(UNSET, mapping, set),
- PROC(GETADDR, mapping, getport),
+ PROC(GETPORT, mapping, getport),
};
static struct rpc_procinfo rpcb_procedures3[] = {
- PROC(SET, mapping, set),
- PROC(UNSET, mapping, set),
+ PROC(SET, getaddr, set),
+ PROC(UNSET, getaddr, set),
PROC(GETADDR, getaddr, getaddr),
};
static struct rpc_procinfo rpcb_procedures4[] = {
- PROC(SET, mapping, set),
- PROC(UNSET, mapping, set),
+ PROC(SET, getaddr, set),
+ PROC(UNSET, getaddr, set),
+ PROC(GETADDR, getaddr, getaddr),
PROC(GETVERSADDR, getaddr, getaddr),
};
static struct rpcb_info rpcb_next_version[] = {
-#ifdef CONFIG_SUNRPC_BIND34
- { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
- { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
-#endif
- { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
- { 0, NULL },
+ {
+ .rpc_vers = RPCBVERS_2,
+ .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
+ },
+ {
+ .rpc_proc = NULL,
+ },
};
static struct rpcb_info rpcb_next_version6[] = {
-#ifdef CONFIG_SUNRPC_BIND34
- { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
- { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
-#endif
- { 0, NULL },
+ {
+ .rpc_vers = RPCBVERS_4,
+ .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
+ },
+ {
+ .rpc_vers = RPCBVERS_3,
+ .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
+ },
+ {
+ .rpc_proc = NULL,
+ },
};
static struct rpc_version rpcb_version2 = {
- .number = 2,
+ .number = RPCBVERS_2,
.nrprocs = RPCB_HIGHPROC_2,
.procs = rpcb_procedures2
};
static struct rpc_version rpcb_version3 = {
- .number = 3,
+ .number = RPCBVERS_3,
.nrprocs = RPCB_HIGHPROC_3,
.procs = rpcb_procedures3
};
static struct rpc_version rpcb_version4 = {
- .number = 4,
+ .number = RPCBVERS_4,
.nrprocs = RPCB_HIGHPROC_4,
.procs = rpcb_procedures4
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff