static void call_encode(struct rpc_task *task);
static void call_decode(struct rpc_task *task);
static void call_bind(struct rpc_task *task);
+static void call_bind_status(struct rpc_task *task);
static void call_transmit(struct rpc_task *task);
static void call_status(struct rpc_task *task);
static void call_refresh(struct rpc_task *task);
* made to sleep too long.
*/
struct rpc_clnt *
-rpc_create_client(struct rpc_xprt *xprt, char *servname,
+rpc_new_client(struct rpc_xprt *xprt, char *servname,
struct rpc_program *program, u32 vers,
rpc_authflavor_t flavor)
{
struct rpc_version *version;
struct rpc_clnt *clnt = NULL;
+ struct rpc_auth *auth;
int err;
int len;
if (err < 0)
goto out_no_path;
- err = -ENOMEM;
- if (!rpcauth_create(flavor, clnt)) {
+ auth = rpcauth_create(flavor, clnt);
+ if (IS_ERR(auth)) {
printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n",
flavor);
+ err = PTR_ERR(auth);
goto out_no_auth;
}
return ERR_PTR(err);
}
+/**
+ * Create an RPC client
+ * @xprt - pointer to xprt struct
+ * @servname - name of server
+ * @info - rpc_program
+ * @version - rpc_program version
+ * @authflavor - rpc_auth flavour to use
+ *
+ * Creates an RPC client structure, then pings the server in order to
+ * determine if it is up, and if it supports this program and version.
+ *
+ * This function should never be called by asynchronous tasks such as
+ * the portmapper.
+ */
+struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
+ struct rpc_program *info, u32 version, rpc_authflavor_t authflavor)
+{
+ struct rpc_clnt *clnt;
+ int err;
+
+ clnt = rpc_new_client(xprt, servname, info, version, authflavor);
+ if (IS_ERR(clnt))
+ return clnt;
+ err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+ if (err == 0)
+ return clnt;
+ rpc_shutdown_client(clnt);
+ return ERR_PTR(err);
+}
+
/*
* This function clones the RPC client structure. It allows us to share the
* same transport while varying parameters such as the authentication
rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
if (new->cl_auth)
atomic_inc(&new->cl_auth->au_count);
+ new->cl_pmap = &new->cl_pmap_default;
+ rpc_init_wait_queue(&new->cl_pmap_default.pm_bindwait, "bindwait");
return new;
out_no_clnt:
printk(KERN_INFO "RPC: out of memory in %s\n", __FUNCTION__);
rpc_destroy_client(clnt);
}
+/**
+ * rpc_bind_new_program - bind a new RPC program to an existing client
+ * @old - old rpc_client
+ * @program - rpc program to set
+ * @vers - rpc program version
+ *
+ * Clones the rpc client and sets up a new RPC program. This is mainly
+ * of use for enabling different RPC programs to share the same transport.
+ * The Sun NFSv2/v3 ACL protocol can do this.
+ */
+struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
+ struct rpc_program *program,
+ int vers)
+{
+ struct rpc_clnt *clnt;
+ struct rpc_version *version;
+ int err;
+
+ BUG_ON(vers >= program->nrvers || !program->version[vers]);
+ version = program->version[vers];
+ clnt = rpc_clone_client(old);
+ if (IS_ERR(clnt))
+ goto out;
+ clnt->cl_procinfo = version->procs;
+ clnt->cl_maxproc = version->nrprocs;
+ clnt->cl_protname = program->name;
+ clnt->cl_prog = program->number;
+ clnt->cl_vers = version->number;
+ clnt->cl_stats = program->stats;
+ err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+ if (err != 0) {
+ rpc_shutdown_client(clnt);
+ clnt = ERR_PTR(err);
+ }
+out:
+ return clnt;
+}
+
/*
* Default callback for async RPC calls
*/
}
/*
- * Export the signal mask handling for aysnchronous code that
+ * Export the signal mask handling for synchronous code that
* sleeps on RPC calls
*/
+#define RPC_INTR_SIGNALS (sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGKILL))
+static void rpc_save_sigmask(sigset_t *oldset, int intr)
+{
+ unsigned long sigallow = 0;
+ sigset_t sigmask;
+
+ /* Block all signals except those listed in sigallow */
+ if (intr)
+ sigallow |= RPC_INTR_SIGNALS;
+ siginitsetinv(&sigmask, sigallow);
+ sigprocmask(SIG_BLOCK, &sigmask, oldset);
+}
+
+static inline void rpc_task_sigmask(struct rpc_task *task, sigset_t *oldset)
+{
+ rpc_save_sigmask(oldset, !RPC_TASK_UNINTERRUPTIBLE(task));
+}
+
+static inline void rpc_restore_sigmask(sigset_t *oldset)
+{
+ sigprocmask(SIG_SETMASK, oldset, NULL);
+}
+
void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset)
{
- unsigned long sigallow = sigmask(SIGKILL);
- unsigned long irqflags;
-
- /* Turn off various signals */
- if (clnt->cl_intr) {
- struct k_sigaction *action = current->sighand->action;
- if (action[SIGINT-1].sa.sa_handler == SIG_DFL)
- sigallow |= sigmask(SIGINT);
- if (action[SIGQUIT-1].sa.sa_handler == SIG_DFL)
- sigallow |= sigmask(SIGQUIT);
- }
- spin_lock_irqsave(¤t->sighand->siglock, irqflags);
- *oldset = current->blocked;
- siginitsetinv(¤t->blocked, sigallow & ~oldset->sig[0]);
- recalc_sigpending();
- spin_unlock_irqrestore(¤t->sighand->siglock, irqflags);
+ rpc_save_sigmask(oldset, clnt->cl_intr);
}
void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset)
{
- unsigned long irqflags;
-
- spin_lock_irqsave(¤t->sighand->siglock, irqflags);
- current->blocked = *oldset;
- recalc_sigpending();
- spin_unlock_irqrestore(¤t->sighand->siglock, irqflags);
+ rpc_restore_sigmask(oldset);
}
/*
BUG_ON(flags & RPC_TASK_ASYNC);
- rpc_clnt_sigmask(clnt, &oldset);
-
status = -ENOMEM;
task = rpc_new_task(clnt, NULL, flags);
if (task == NULL)
goto out;
+ /* Mask signals on RPC calls _and_ GSS_AUTH upcalls */
+ rpc_task_sigmask(task, &oldset);
+
rpc_call_setup(task, msg, 0);
/* Set up the call info struct and execute the task */
- if (task->tk_status == 0)
+ if (task->tk_status == 0) {
status = rpc_execute(task);
- else {
+ } else {
status = task->tk_status;
rpc_release_task(task);
}
+ rpc_restore_sigmask(&oldset);
out:
- rpc_clnt_sigunmask(clnt, &oldset);
-
return status;
}
flags |= RPC_TASK_ASYNC;
- rpc_clnt_sigmask(clnt, &oldset);
-
/* Create/initialize a new RPC task */
if (!callback)
callback = rpc_default_callback;
goto out;
task->tk_calldata = data;
+ /* Mask signals on GSS_AUTH upcalls */
+ rpc_task_sigmask(task, &oldset);
+
rpc_call_setup(task, msg, 0);
/* Set up the call info struct and execute the task */
else
rpc_release_task(task);
+ rpc_restore_sigmask(&oldset);
out:
- rpc_clnt_sigunmask(clnt, &oldset);
-
return status;
}
xprt->rcvsize = 0;
if (rcvsize)
xprt->rcvsize = rcvsize + RPC_SLACK_SPACE;
- if (xprt_connected(xprt))
- xprt_sock_setbufsize(xprt);
+ xprt->ops->set_buffer_size(xprt);
}
/*
return;
printk(KERN_INFO "RPC: buffer allocation failed for task %p\n", task);
- if (RPC_IS_ASYNC(task) || !(task->tk_client->cl_intr && signalled())) {
+ if (RPC_IS_ASYNC(task) || !signalled()) {
xprt_release(task);
task->tk_action = call_reserve;
rpc_delay(task, HZ>>4);
call_bind(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
- struct rpc_xprt *xprt = clnt->cl_xprt;
- dprintk("RPC: %4d call_bind xprt %p %s connected\n", task->tk_pid,
- xprt, (xprt_connected(xprt) ? "is" : "is not"));
-
- task->tk_action = (xprt_connected(xprt)) ? call_transmit : call_connect;
+ dprintk("RPC: %4d call_bind (status %d)\n",
+ task->tk_pid, task->tk_status);
+ task->tk_action = call_connect;
if (!clnt->cl_port) {
- task->tk_action = call_connect;
+ task->tk_action = call_bind_status;
task->tk_timeout = RPC_CONNECT_TIMEOUT;
rpc_getport(task, clnt);
}
}
/*
- * 4a. Connect to the RPC server (TCP case)
+ * 4a. Sort out bind result
+ */
+static void
+call_bind_status(struct rpc_task *task)
+{
+ int status = -EACCES;
+
+ if (task->tk_status >= 0) {
+ dprintk("RPC: %4d call_bind_status (status %d)\n",
+ task->tk_pid, task->tk_status);
+ task->tk_status = 0;
+ task->tk_action = call_connect;
+ return;
+ }
+
+ switch (task->tk_status) {
+ case -EACCES:
+ dprintk("RPC: %4d remote rpcbind: RPC program/version unavailable\n",
+ task->tk_pid);
+ break;
+ case -ETIMEDOUT:
+ dprintk("RPC: %4d rpcbind request timed out\n",
+ task->tk_pid);
+ if (RPC_IS_SOFT(task)) {
+ status = -EIO;
+ break;
+ }
+ goto retry_bind;
+ case -EPFNOSUPPORT:
+ dprintk("RPC: %4d remote rpcbind service unavailable\n",
+ task->tk_pid);
+ break;
+ case -EPROTONOSUPPORT:
+ dprintk("RPC: %4d remote rpcbind version 2 unavailable\n",
+ task->tk_pid);
+ break;
+ default:
+ dprintk("RPC: %4d unrecognized rpcbind error (%d)\n",
+ task->tk_pid, -task->tk_status);
+ status = -EIO;
+ break;
+ }
+
+ rpc_exit(task, status);
+ return;
+
+retry_bind:
+ task->tk_status = 0;
+ task->tk_action = call_bind;
+ return;
+}
+
+/*
+ * 4b. Connect to the RPC server
*/
static void
call_connect(struct rpc_task *task)
{
- struct rpc_clnt *clnt = task->tk_client;
+ struct rpc_xprt *xprt = task->tk_xprt;
- dprintk("RPC: %4d call_connect status %d\n",
- task->tk_pid, task->tk_status);
+ dprintk("RPC: %4d call_connect xprt %p %s connected\n",
+ task->tk_pid, xprt,
+ (xprt_connected(xprt) ? "is" : "is not"));
- if (xprt_connected(clnt->cl_xprt)) {
- task->tk_action = call_transmit;
- return;
+ task->tk_action = call_transmit;
+ if (!xprt_connected(xprt)) {
+ task->tk_action = call_connect_status;
+ if (task->tk_status < 0)
+ return;
+ xprt_connect(task);
}
- task->tk_action = call_connect_status;
- if (task->tk_status < 0)
- return;
- xprt_connect(task);
}
/*
- * 4b. Sort out connect result
+ * 4c. Sort out connect result
*/
static void
call_connect_status(struct rpc_task *task)
struct rpc_clnt *clnt = task->tk_client;
int status = task->tk_status;
+ dprintk("RPC: %5u call_connect_status (status %d)\n",
+ task->tk_pid, task->tk_status);
+
task->tk_status = 0;
if (status >= 0) {
clnt->cl_stats->netreconn++;
return;
}
- /* Something failed: we may have to rebind */
+ /* Something failed: remote service port may have changed */
if (clnt->cl_autobind)
clnt->cl_port = 0;
+
switch (status) {
case -ENOTCONN:
case -ETIMEDOUT:
case -EAGAIN:
- task->tk_action = (clnt->cl_port == 0) ? call_bind : call_connect;
+ task->tk_action = call_bind;
break;
default:
rpc_exit(task, -EIO);
+ break;
}
}
case RPC_AUTH_ERROR:
break;
case RPC_MISMATCH:
- printk(KERN_WARNING "%s: RPC call version mismatch!\n", __FUNCTION__);
- goto out_eio;
+ dprintk("%s: RPC call version mismatch!\n", __FUNCTION__);
+ error = -EPROTONOSUPPORT;
+ goto out_err;
default:
- printk(KERN_WARNING "%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
+ dprintk("%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
goto out_eio;
}
if (--len < 0)
case RPC_SUCCESS:
return p;
case RPC_PROG_UNAVAIL:
- printk(KERN_WARNING "RPC: call_verify: program %u is unsupported by server %s\n",
+ dprintk("RPC: call_verify: program %u is unsupported by server %s\n",
(unsigned int)task->tk_client->cl_prog,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EPFNOSUPPORT;
+ goto out_err;
case RPC_PROG_MISMATCH:
- printk(KERN_WARNING "RPC: call_verify: program %u, version %u unsupported by server %s\n",
+ dprintk("RPC: call_verify: program %u, version %u unsupported by server %s\n",
(unsigned int)task->tk_client->cl_prog,
(unsigned int)task->tk_client->cl_vers,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EPROTONOSUPPORT;
+ goto out_err;
case RPC_PROC_UNAVAIL:
- printk(KERN_WARNING "RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
+ dprintk("RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
task->tk_msg.rpc_proc,
task->tk_client->cl_prog,
task->tk_client->cl_vers,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EOPNOTSUPP;
+ goto out_err;
case RPC_GARBAGE_ARGS:
dprintk("RPC: %4d %s: server saw garbage\n", task->tk_pid, __FUNCTION__);
break; /* retry */
task->tk_client->cl_stats->rpcgarbage++;
if (task->tk_garb_retry) {
task->tk_garb_retry--;
- dprintk(KERN_WARNING "RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
+ dprintk("RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
task->tk_action = call_bind;
return NULL;
}
printk(KERN_WARNING "RPC %s: server reply was truncated.\n", __FUNCTION__);
goto out_retry;
}
+
+static int rpcproc_encode_null(void *rqstp, u32 *data, void *obj)
+{
+ return 0;
+}
+
+static int rpcproc_decode_null(void *rqstp, u32 *data, void *obj)
+{
+ return 0;
+}
+
+static struct rpc_procinfo rpcproc_null = {
+ .p_encode = rpcproc_encode_null,
+ .p_decode = rpcproc_decode_null,
+};
+
+int rpc_ping(struct rpc_clnt *clnt, int flags)
+{
+ 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);
+ put_rpccred(msg.rpc_cred);
+ return err;
+}
projects / linux-2.6 / blobdiff