#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
-#include <linux/random.h>
+#include <linux/net.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/metrics.h>
*/
#ifdef RPC_DEBUG
-# undef RPC_DEBUG_DATA
# define RPCDBG_FACILITY RPCDBG_XPRT
#endif
dprintk("RPC: %4d xprt_connect xprt %p %s connected\n", task->tk_pid,
xprt, (xprt_connected(xprt) ? "is" : "is not"));
- if (!xprt->addr.sin_port) {
+ if (!xprt_bound(xprt)) {
task->tk_status = -EIO;
return;
}
task->tk_pid, -task->tk_status, task->tk_client->cl_server);
xprt_release_write(xprt, task);
task->tk_status = -EIO;
- return;
- }
-
- /* if soft mounted, just cause this RPC to fail */
- if (RPC_IS_SOFT(task)) {
- xprt_release_write(xprt, task);
- task->tk_status = -EIO;
}
}
* @xid: RPC XID of incoming reply
*
*/
-struct rpc_rqst *xprt_lookup_rqst(struct rpc_xprt *xprt, u32 xid)
+struct rpc_rqst *xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid)
{
struct list_head *pos;
task->tk_rtt = (long)jiffies - req->rq_xtime;
list_del_init(&req->rq_list);
+ /* Ensure all writes are done before we update req->rq_received */
+ smp_wmb();
req->rq_received = req->rq_private_buf.len = copied;
rpc_wake_up_task(task);
}
return err;
}
-void
-xprt_abort_transmit(struct rpc_task *task)
+void xprt_end_transmit(struct rpc_task *task)
{
- struct rpc_xprt *xprt = task->tk_xprt;
-
- xprt_release_write(xprt, task);
+ xprt_release_write(task->tk_xprt, task);
}
/**
dprintk("RPC: %4d xprt_transmit(%u)\n", task->tk_pid, req->rq_slen);
- smp_rmb();
if (!req->rq_received) {
if (list_empty(&req->rq_list)) {
spin_lock_bh(&xprt->transport_lock);
task->tk_status = -ENOTCONN;
else if (!req->rq_received)
rpc_sleep_on(&xprt->pending, task, NULL, xprt_timer);
-
- xprt->ops->release_xprt(xprt, task);
spin_unlock_bh(&xprt->transport_lock);
return;
}
* schedq, and being picked up by a parallel run of rpciod().
*/
task->tk_status = status;
-
- switch (status) {
- case -ECONNREFUSED:
+ if (status == -ECONNREFUSED)
rpc_sleep_on(&xprt->sending, task, NULL, NULL);
- case -EAGAIN:
- case -ENOTCONN:
- return;
- default:
- break;
- }
- xprt_release_write(xprt, task);
- return;
}
static inline void do_xprt_reserve(struct rpc_task *task)
spin_unlock(&xprt->reserve_lock);
}
-static inline u32 xprt_alloc_xid(struct rpc_xprt *xprt)
+static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt)
{
return xprt->xid++;
}
static inline void xprt_init_xid(struct rpc_xprt *xprt)
{
- get_random_bytes(&xprt->xid, sizeof(xprt->xid));
+ xprt->xid = net_random();
}
static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt)
req->rq_bufsize = 0;
req->rq_xid = xprt_alloc_xid(xprt);
req->rq_release_snd_buf = NULL;
+ xprt_reset_majortimeo(req);
dprintk("RPC: %4d reserved req %p xid %08x\n", task->tk_pid,
req, ntohl(req->rq_xid));
}
to->to_exponential = 0;
}
-static struct rpc_xprt *xprt_setup(int proto, struct sockaddr_in *ap, struct rpc_timeout *to)
+/**
+ * xprt_create_transport - create an RPC transport
+ * @proto: requested transport protocol
+ * @ap: remote peer address
+ * @size: length of address
+ * @to: timeout parameters
+ *
+ */
+struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t size, struct rpc_timeout *to)
{
int result;
struct rpc_xprt *xprt;
struct rpc_rqst *req;
- if ((xprt = kmalloc(sizeof(struct rpc_xprt), GFP_KERNEL)) == NULL)
+ if ((xprt = kzalloc(sizeof(struct rpc_xprt), GFP_KERNEL)) == NULL) {
+ dprintk("RPC: xprt_create_transport: no memory\n");
return ERR_PTR(-ENOMEM);
- memset(xprt, 0, sizeof(*xprt)); /* Nnnngh! */
-
- xprt->addr = *ap;
+ }
+ if (size <= sizeof(xprt->addr)) {
+ memcpy(&xprt->addr, ap, size);
+ xprt->addrlen = size;
+ } else {
+ kfree(xprt);
+ dprintk("RPC: xprt_create_transport: address too large\n");
+ return ERR_PTR(-EBADF);
+ }
switch (proto) {
case IPPROTO_UDP:
default:
printk(KERN_ERR "RPC: unrecognized transport protocol: %d\n",
proto);
- result = -EIO;
- break;
+ return ERR_PTR(-EIO);
}
if (result) {
kfree(xprt);
+ dprintk("RPC: xprt_create_transport: failed, %d\n", result);
return ERR_PTR(result);
}
+ kref_init(&xprt->kref);
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
xprt->last_used = jiffies;
xprt->cwnd = RPC_INITCWND;
+ rpc_init_wait_queue(&xprt->binding, "xprt_binding");
rpc_init_wait_queue(&xprt->pending, "xprt_pending");
rpc_init_wait_queue(&xprt->sending, "xprt_sending");
rpc_init_wait_queue(&xprt->resend, "xprt_resend");
dprintk("RPC: created transport %p with %u slots\n", xprt,
xprt->max_reqs);
-
- return xprt;
-}
-/**
- * xprt_create_proto - create an RPC client transport
- * @proto: requested transport protocol
- * @sap: remote peer's address
- * @to: timeout parameters for new transport
- *
- */
-struct rpc_xprt *xprt_create_proto(int proto, struct sockaddr_in *sap, struct rpc_timeout *to)
-{
- struct rpc_xprt *xprt;
-
- xprt = xprt_setup(proto, sap, to);
- if (IS_ERR(xprt))
- dprintk("RPC: xprt_create_proto failed\n");
- else
- dprintk("RPC: xprt_create_proto created xprt %p\n", xprt);
return xprt;
}
/**
* xprt_destroy - destroy an RPC transport, killing off all requests.
- * @xprt: transport to destroy
+ * @kref: kref for the transport to destroy
*
*/
-int xprt_destroy(struct rpc_xprt *xprt)
+static void xprt_destroy(struct kref *kref)
{
+ struct rpc_xprt *xprt = container_of(kref, struct rpc_xprt, kref);
+
dprintk("RPC: destroying transport %p\n", xprt);
xprt->shutdown = 1;
del_timer_sync(&xprt->timer);
xprt->ops->destroy(xprt);
kfree(xprt);
+}
- return 0;
+/**
+ * xprt_put - release a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+void xprt_put(struct rpc_xprt *xprt)
+{
+ kref_put(&xprt->kref, xprt_destroy);
+}
+
+/**
+ * xprt_get - return a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
+{
+ kref_get(&xprt->kref);
+ return xprt;
}