dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \
__FUNCTION__, t->tk_status)
+/*
+ * All RPC clients are linked into this list
+ */
+static LIST_HEAD(all_clients);
+static DEFINE_SPINLOCK(rpc_client_lock);
+
static DECLARE_WAIT_QUEUE_HEAD(destroy_wait);
static __be32 * call_header(struct rpc_task *task);
static __be32 * call_verify(struct rpc_task *task);
+static void rpc_register_client(struct rpc_clnt *clnt)
+{
+ spin_lock(&rpc_client_lock);
+ list_add(&clnt->cl_clients, &all_clients);
+ spin_unlock(&rpc_client_lock);
+}
+
+static void rpc_unregister_client(struct rpc_clnt *clnt)
+{
+ spin_lock(&rpc_client_lock);
+ list_del(&clnt->cl_clients);
+ spin_unlock(&rpc_client_lock);
+}
static int
rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
dprintk("RPC: creating %s client for %s (xprt %p)\n",
program->name, servname, xprt);
+ err = rpciod_up();
+ if (err)
+ goto out_no_rpciod;
err = -EINVAL;
if (!xprt)
goto out_no_xprt;
clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);
if (!clnt)
goto out_err;
- atomic_set(&clnt->cl_users, 0);
- atomic_set(&clnt->cl_count, 1);
clnt->cl_parent = clnt;
clnt->cl_server = clnt->cl_inline_name;
if (clnt->cl_metrics == NULL)
goto out_no_stats;
clnt->cl_program = program;
+ INIT_LIST_HEAD(&clnt->cl_tasks);
+ spin_lock_init(&clnt->cl_lock);
if (!xprt_bound(clnt->cl_xprt))
clnt->cl_autobind = 1;
clnt->cl_rtt = &clnt->cl_rtt_default;
rpc_init_rtt(&clnt->cl_rtt_default, xprt->timeout.to_initval);
+ kref_init(&clnt->cl_kref);
+
err = rpc_setup_pipedir(clnt, program->pipe_dir_name);
if (err < 0)
goto out_no_path;
if (clnt->cl_nodelen > UNX_MAXNODENAME)
clnt->cl_nodelen = UNX_MAXNODENAME;
memcpy(clnt->cl_nodename, utsname()->nodename, clnt->cl_nodelen);
+ rpc_register_client(clnt);
return clnt;
out_no_auth:
out_err:
xprt_put(xprt);
out_no_xprt:
+ rpciod_down();
+out_no_rpciod:
return ERR_PTR(err);
}
clnt->cl_intr = 1;
if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
clnt->cl_autobind = 1;
- if (args->flags & RPC_CLNT_CREATE_ONESHOT)
- clnt->cl_oneshot = 1;
if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
clnt->cl_discrtry = 1;
new = kmemdup(clnt, sizeof(*new), GFP_KERNEL);
if (!new)
goto out_no_clnt;
- atomic_set(&new->cl_count, 1);
- atomic_set(&new->cl_users, 0);
+ new->cl_parent = clnt;
+ /* Turn off autobind on clones */
+ new->cl_autobind = 0;
+ INIT_LIST_HEAD(&new->cl_tasks);
+ spin_lock_init(&new->cl_lock);
+ rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
new->cl_metrics = rpc_alloc_iostats(clnt);
if (new->cl_metrics == NULL)
goto out_no_stats;
+ kref_init(&new->cl_kref);
err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name);
if (err != 0)
goto out_no_path;
- new->cl_parent = clnt;
- atomic_inc(&clnt->cl_count);
- new->cl_xprt = xprt_get(clnt->cl_xprt);
- /* Turn off autobind on clones */
- new->cl_autobind = 0;
- new->cl_oneshot = 0;
- new->cl_dead = 0;
- rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
if (new->cl_auth)
atomic_inc(&new->cl_auth->au_count);
+ xprt_get(clnt->cl_xprt);
+ kref_get(&clnt->cl_kref);
+ rpc_register_client(new);
+ rpciod_up();
return new;
out_no_path:
rpc_free_iostats(new->cl_metrics);
/*
* Properly shut down an RPC client, terminating all outstanding
- * requests. Note that we must be certain that cl_oneshot and
- * cl_dead are cleared, or else the client would be destroyed
- * when the last task releases it.
+ * requests.
*/
-int
-rpc_shutdown_client(struct rpc_clnt *clnt)
+void rpc_shutdown_client(struct rpc_clnt *clnt)
{
- dprintk("RPC: shutting down %s client for %s, tasks=%d\n",
- clnt->cl_protname, clnt->cl_server,
- atomic_read(&clnt->cl_users));
-
- while (atomic_read(&clnt->cl_users) > 0) {
- /* Don't let rpc_release_client destroy us */
- clnt->cl_oneshot = 0;
- clnt->cl_dead = 0;
+ dprintk("RPC: shutting down %s client for %s\n",
+ clnt->cl_protname, clnt->cl_server);
+
+ while (!list_empty(&clnt->cl_tasks)) {
rpc_killall_tasks(clnt);
wait_event_timeout(destroy_wait,
- !atomic_read(&clnt->cl_users), 1*HZ);
- }
-
- if (atomic_read(&clnt->cl_users) < 0) {
- printk(KERN_ERR "RPC: rpc_shutdown_client clnt %p tasks=%d\n",
- clnt, atomic_read(&clnt->cl_users));
-#ifdef RPC_DEBUG
- rpc_show_tasks();
-#endif
- BUG();
+ list_empty(&clnt->cl_tasks), 1*HZ);
}
- return rpc_destroy_client(clnt);
+ rpc_release_client(clnt);
}
/*
- * Delete an RPC client
+ * Free an RPC client
*/
-int
-rpc_destroy_client(struct rpc_clnt *clnt)
+static void
+rpc_free_client(struct kref *kref)
{
- if (!atomic_dec_and_test(&clnt->cl_count))
- return 1;
- BUG_ON(atomic_read(&clnt->cl_users) != 0);
+ struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref);
dprintk("RPC: destroying %s client for %s\n",
clnt->cl_protname, clnt->cl_server);
rpc_put_mount();
}
if (clnt->cl_parent != clnt) {
- rpc_destroy_client(clnt->cl_parent);
+ rpc_release_client(clnt->cl_parent);
goto out_free;
}
if (clnt->cl_server != clnt->cl_inline_name)
kfree(clnt->cl_server);
out_free:
+ rpc_unregister_client(clnt);
rpc_free_iostats(clnt->cl_metrics);
clnt->cl_metrics = NULL;
xprt_put(clnt->cl_xprt);
+ rpciod_down();
kfree(clnt);
- return 0;
}
/*
- * Release an RPC client
+ * Release reference to the RPC client
*/
void
rpc_release_client(struct rpc_clnt *clnt)
{
- dprintk("RPC: rpc_release_client(%p, %d)\n",
- clnt, atomic_read(&clnt->cl_users));
+ dprintk("RPC: rpc_release_client(%p)\n", clnt);
- if (!atomic_dec_and_test(&clnt->cl_users))
- return;
- wake_up(&destroy_wait);
- if (clnt->cl_oneshot || clnt->cl_dead)
- rpc_destroy_client(clnt);
+ if (list_empty(&clnt->cl_tasks))
+ wake_up(&destroy_wait);
+ kref_put(&clnt->cl_kref, rpc_free_client);
}
/**
rpc_restore_sigmask(oldset);
}
-/*
- * New rpc_call implementation
+static
+struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
+ struct rpc_message *msg,
+ int flags,
+ const struct rpc_call_ops *ops,
+ void *data)
+{
+ struct rpc_task *task, *ret;
+ sigset_t oldset;
+
+ task = rpc_new_task(clnt, flags, ops, data);
+ if (task == NULL) {
+ rpc_release_calldata(ops, data);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /* Mask signals on synchronous RPC calls and RPCSEC_GSS upcalls */
+ rpc_task_sigmask(task, &oldset);
+ if (msg != NULL) {
+ rpc_call_setup(task, msg, 0);
+ if (task->tk_status != 0) {
+ ret = ERR_PTR(task->tk_status);
+ rpc_put_task(task);
+ goto out;
+ }
+ }
+ atomic_inc(&task->tk_count);
+ rpc_execute(task);
+ ret = task;
+out:
+ rpc_restore_sigmask(&oldset);
+ return ret;
+}
+
+/**
+ * rpc_call_sync - Perform a synchronous RPC call
+ * @clnt: pointer to RPC client
+ * @msg: RPC call parameters
+ * @flags: RPC call flags
*/
int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
{
struct rpc_task *task;
- sigset_t oldset;
- int status;
-
- /* If this client is slain all further I/O fails */
- if (clnt->cl_dead)
- return -EIO;
+ int status;
BUG_ON(flags & RPC_TASK_ASYNC);
- task = rpc_new_task(clnt, flags, &rpc_default_ops, NULL);
- if (task == NULL)
- return -ENOMEM;
-
- /* Mask signals on RPC calls _and_ GSS_AUTH upcalls */
- rpc_task_sigmask(task, &oldset);
-
- /* Set up the call info struct and execute the task */
- rpc_call_setup(task, msg, 0);
- if (task->tk_status == 0) {
- atomic_inc(&task->tk_count);
- rpc_execute(task);
- }
+ task = rpc_do_run_task(clnt, msg, flags, &rpc_default_ops, NULL);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
status = task->tk_status;
rpc_put_task(task);
- rpc_restore_sigmask(&oldset);
return status;
}
-/*
- * New rpc_call implementation
+/**
+ * rpc_call_async - Perform an asynchronous RPC call
+ * @clnt: pointer to RPC client
+ * @msg: RPC call parameters
+ * @flags: RPC call flags
+ * @ops: RPC call ops
+ * @data: user call data
*/
int
rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags,
const struct rpc_call_ops *tk_ops, void *data)
{
struct rpc_task *task;
- sigset_t oldset;
- int status;
-
- /* If this client is slain all further I/O fails */
- status = -EIO;
- if (clnt->cl_dead)
- goto out_release;
-
- flags |= RPC_TASK_ASYNC;
- /* Create/initialize a new RPC task */
- status = -ENOMEM;
- if (!(task = rpc_new_task(clnt, flags, tk_ops, data)))
- goto out_release;
-
- /* 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 */
- status = task->tk_status;
- if (status == 0)
- rpc_execute(task);
- else
- rpc_put_task(task);
-
- rpc_restore_sigmask(&oldset);
- return status;
-out_release:
- rpc_release_calldata(tk_ops, data);
- return status;
+ task = rpc_do_run_task(clnt, msg, flags|RPC_TASK_ASYNC, tk_ops, data);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ rpc_put_task(task);
+ return 0;
}
+/**
+ * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
+ * @clnt: pointer to RPC client
+ * @flags: RPC flags
+ * @ops: RPC call ops
+ * @data: user call data
+ */
+struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
+ const struct rpc_call_ops *tk_ops,
+ void *data)
+{
+ return rpc_do_run_task(clnt, NULL, flags, tk_ops, data);
+}
+EXPORT_SYMBOL(rpc_run_task);
void
rpc_call_setup(struct rpc_task *task, struct rpc_message *msg, int flags)
task->tk_pid);
break;
case -EPROTONOSUPPORT:
- dprintk("RPC: %5u remote rpcbind version 2 unavailable\n",
+ dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n",
task->tk_pid);
- break;
+ task->tk_status = 0;
+ task->tk_action = call_bind;
+ return;
default:
dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
task->tk_pid, -task->tk_status);
put_rpccred(msg.rpc_cred);
return err;
}
+
+#ifdef RPC_DEBUG
+void rpc_show_tasks(void)
+{
+ struct rpc_clnt *clnt;
+ struct rpc_task *t;
+
+ spin_lock(&rpc_client_lock);
+ if (list_empty(&all_clients))
+ goto out;
+ printk("-pid- proc flgs status -client- -prog- --rqstp- -timeout "
+ "-rpcwait -action- ---ops--\n");
+ list_for_each_entry(clnt, &all_clients, cl_clients) {
+ if (list_empty(&clnt->cl_tasks))
+ continue;
+ spin_lock(&clnt->cl_lock);
+ list_for_each_entry(t, &clnt->cl_tasks, tk_task) {
+ const char *rpc_waitq = "none";
+
+ if (RPC_IS_QUEUED(t))
+ rpc_waitq = rpc_qname(t->u.tk_wait.rpc_waitq);
+
+ printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n",
+ t->tk_pid,
+ (t->tk_msg.rpc_proc ? t->tk_msg.rpc_proc->p_proc : -1),
+ t->tk_flags, t->tk_status,
+ t->tk_client,
+ (t->tk_client ? t->tk_client->cl_prog : 0),
+ t->tk_rqstp, t->tk_timeout,
+ rpc_waitq,
+ t->tk_action, t->tk_ops);
+ }
+ spin_unlock(&clnt->cl_lock);
+ }
+out:
+ spin_unlock(&rpc_client_lock);
+}
+#endif
projects / linux-2.6 / blobdiff