#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/file.h>
+#ifdef CONFIG_NFS_V4_1
+#include <linux/sunrpc/bc_xprt.h>
+#endif
#include <net/sock.h>
#include <net/checksum.h>
UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS);
/* Something worked... */
- dst_confirm(skb->dst);
+ dst_confirm(skb_dst(skb));
xprt_adjust_cwnd(task, copied);
xprt_update_rtt(task);
xs_tcp_check_fraghdr(transport);
}
-static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_reader *desc)
+static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc,
+ struct rpc_rqst *req)
{
- struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
- struct rpc_rqst *req;
+ struct sock_xprt *transport =
+ container_of(xprt, struct sock_xprt, xprt);
struct xdr_buf *rcvbuf;
size_t len;
ssize_t r;
- /* Find and lock the request corresponding to this xid */
- spin_lock(&xprt->transport_lock);
- req = xprt_lookup_rqst(xprt, transport->tcp_xid);
- if (!req) {
- transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
- dprintk("RPC: XID %08x request not found!\n",
- ntohl(transport->tcp_xid));
- spin_unlock(&xprt->transport_lock);
- return;
- }
-
rcvbuf = &req->rq_private_buf;
if (transport->tcp_flags & TCP_RCV_COPY_CALLDIR) {
"tcp_offset = %u, tcp_reclen = %u\n",
xprt, transport->tcp_copied,
transport->tcp_offset, transport->tcp_reclen);
- goto out;
+ return;
}
dprintk("RPC: XID %08x read %Zd bytes\n",
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
}
-out:
+ return;
+}
+
+/*
+ * Finds the request corresponding to the RPC xid and invokes the common
+ * tcp read code to read the data.
+ */
+static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc)
+{
+ struct sock_xprt *transport =
+ container_of(xprt, struct sock_xprt, xprt);
+ struct rpc_rqst *req;
+
+ dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid));
+
+ /* Find and lock the request corresponding to this xid */
+ spin_lock(&xprt->transport_lock);
+ req = xprt_lookup_rqst(xprt, transport->tcp_xid);
+ if (!req) {
+ dprintk("RPC: XID %08x request not found!\n",
+ ntohl(transport->tcp_xid));
+ spin_unlock(&xprt->transport_lock);
+ return -1;
+ }
+
+ xs_tcp_read_common(xprt, desc, req);
+
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_rqst(req->rq_task, transport->tcp_copied);
+
spin_unlock(&xprt->transport_lock);
- xs_tcp_check_fraghdr(transport);
+ return 0;
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * Obtains an rpc_rqst previously allocated and invokes the common
+ * tcp read code to read the data. The result is placed in the callback
+ * queue.
+ * If we're unable to obtain the rpc_rqst we schedule the closing of the
+ * connection and return -1.
+ */
+static inline int xs_tcp_read_callback(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc)
+{
+ struct sock_xprt *transport =
+ container_of(xprt, struct sock_xprt, xprt);
+ struct rpc_rqst *req;
+
+ req = xprt_alloc_bc_request(xprt);
+ if (req == NULL) {
+ printk(KERN_WARNING "Callback slot table overflowed\n");
+ xprt_force_disconnect(xprt);
+ return -1;
+ }
+
+ req->rq_xid = transport->tcp_xid;
+ dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid));
+ xs_tcp_read_common(xprt, desc, req);
+
+ if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) {
+ struct svc_serv *bc_serv = xprt->bc_serv;
+
+ /*
+ * Add callback request to callback list. The callback
+ * service sleeps on the sv_cb_waitq waiting for new
+ * requests. Wake it up after adding enqueing the
+ * request.
+ */
+ dprintk("RPC: add callback request to list\n");
+ spin_lock(&bc_serv->sv_cb_lock);
+ list_add(&req->rq_bc_list, &bc_serv->sv_cb_list);
+ spin_unlock(&bc_serv->sv_cb_lock);
+ wake_up(&bc_serv->sv_cb_waitq);
+ }
+
+ req->rq_private_buf.len = transport->tcp_copied;
+
+ return 0;
+}
+
+static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc)
+{
+ struct sock_xprt *transport =
+ container_of(xprt, struct sock_xprt, xprt);
+
+ return (transport->tcp_flags & TCP_RPC_REPLY) ?
+ xs_tcp_read_reply(xprt, desc) :
+ xs_tcp_read_callback(xprt, desc);
+}
+#else
+static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc)
+{
+ return xs_tcp_read_reply(xprt, desc);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * Read data off the transport. This can be either an RPC_CALL or an
+ * RPC_REPLY. Relay the processing to helper functions.
+ */
+static void xs_tcp_read_data(struct rpc_xprt *xprt,
+ struct xdr_skb_reader *desc)
+{
+ struct sock_xprt *transport =
+ container_of(xprt, struct sock_xprt, xprt);
+
+ if (_xs_tcp_read_data(xprt, desc) == 0)
+ xs_tcp_check_fraghdr(transport);
+ else {
+ /*
+ * The transport_lock protects the request handling.
+ * There's no need to hold it to update the tcp_flags.
+ */
+ transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
+ }
}
static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc)
}
/* Read in the request data */
if (transport->tcp_flags & TCP_RCV_COPY_DATA) {
- xs_tcp_read_request(xprt, &desc);
+ xs_tcp_read_data(xprt, &desc);
continue;
}
/* Skip over any trailing bytes on short reads */
*/
set_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
xprt_force_disconnect(xprt);
+ break;
case -ECONNREFUSED:
case -ECONNRESET:
case -ENETUNREACH:
.buf_free = rpc_free,
.send_request = xs_tcp_send_request,
.set_retrans_timeout = xprt_set_retrans_timeout_def,
+#if defined(CONFIG_NFS_V4_1)
+ .release_request = bc_release_request,
+#endif /* CONFIG_NFS_V4_1 */
.close = xs_tcp_close,
.destroy = xs_destroy,
.print_stats = xs_tcp_print_stats,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff