From: Benny Halevy Subject: [PATCH RFC 02/10] nfsd41: sunrpc: Added rpc server-side backchannel handling Date: Thu, 20 Aug 2009 03:34:23 +0300 Message-ID: <1250728463-28511-1-git-send-email-bhalevy@panasas.com> References: <4A8C9992.2000505@panasas.com> Cc: linux-nfs@vger.kernel.org, pnfs@linux-nfs.org, Rahul Iyer , Mike Sager , Marc Eshel , Benny Halevy , Ricardo Labiaga , Andy Adamson , Alexandros Batsakis To: bfields@fieldses.org Return-path: Received: from ip67-152-220-67.z220-152-67.customer.algx.net ([67.152.220.67]:15755 "EHLO daytona.int.panasas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753382AbZHTAsW (ORCPT ); Wed, 19 Aug 2009 20:48:22 -0400 In-Reply-To: <4A8C9992.2000505@panasas.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: From: Rahul Iyer Signed-off-by: Rahul Iyer Signed-off-by: Mike Sager Signed-off-by: Marc Eshel Signed-off-by: Benny Halevy Signed-off-by: Ricardo Labiaga When the call direction is a reply, copy the xid and call direction into the req->rq_private_buf.head[0].iov_base otherwise rpc_verify_header returns rpc_garbage. Signed-off-by: Andy Adamson Signed-off-by: Benny Halevy [get rid of CONFIG_NFSD_V4_1] Signed-off-by: Benny Halevy [sunrpc: refactoring of svc_tcp_recvfrom] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: create common send routine for the fore and the back channels] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: Use free_page() to free server backchannel pages] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: Document server backchannel locking] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: remove bc_connect_worker()] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: Define xprt_server_backchannel()[ Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: remove bc_close and bc_init_auto_disconnect dummy functions] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: eliminate unneeded switch statement in xs_setup_tcp()] Signed-off-by: Alexandros Batsakis Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: Don't auto close the server backchannel connection] Signed-off-by: Ricardo Labiaga [nfsd41: sunrpc: Remove unused functions] Signed-off-by: Ricardo Labiaga Signed-off-by: Benny Halevy [nfsd41: change bc_sock to bc_xprt] Signed-off-by: Benny Halevy --- include/linux/sunrpc/clnt.h | 1 + include/linux/sunrpc/svcsock.h | 1 + include/linux/sunrpc/xprt.h | 7 ++ net/sunrpc/clnt.c | 1 + net/sunrpc/sunrpc.h | 4 + net/sunrpc/svcsock.c | 172 +++++++++++++++++++++++++++------- net/sunrpc/xprt.c | 16 +++- net/sunrpc/xprtsock.c | 203 ++++++++++++++++++++++++++++++++++++++-- 8 files changed, 361 insertions(+), 44 deletions(-) diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index 37881f1..d904889 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -110,6 +110,7 @@ struct rpc_create_args { rpc_authflavor_t authflavor; unsigned long flags; char *client_name; + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ }; /* Values for "flags" field */ diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index 04dba23..4b854e2 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -28,6 +28,7 @@ struct svc_sock { /* private TCP part */ u32 sk_reclen; /* length of record */ u32 sk_tcplen; /* current read length */ + struct rpc_xprt *sk_bc_xprt; /* NFSv4.1 backchannel xprt */ }; /* diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 1175d58..75cb619 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -181,6 +181,7 @@ struct rpc_xprt { spinlock_t reserve_lock; /* lock slot table */ u32 xid; /* Next XID value to use */ struct rpc_task * snd_task; /* Task blocked in send */ + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ #if defined(CONFIG_NFS_V4_1) struct svc_serv *bc_serv; /* The RPC service which will */ /* process the callback */ @@ -233,6 +234,7 @@ struct xprt_create { struct sockaddr * srcaddr; /* optional local address */ struct sockaddr * dstaddr; /* remote peer address */ size_t addrlen; + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ }; struct xprt_class { @@ -368,6 +370,11 @@ static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt) return test_and_set_bit(XPRT_BINDING, &xprt->state); } +static inline int xprt_server_backchannel(struct rpc_xprt *xprt) +{ + return xprt->bc_xprt != NULL; +} + #endif /* __KERNEL__*/ #endif /* _LINUX_SUNRPC_XPRT_H */ diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index ebfcf9b..f45d3bb 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -270,6 +270,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args) .srcaddr = args->saddress, .dstaddr = args->address, .addrlen = args->addrsize, + .bc_xprt = args->bc_xprt, }; char servername[48]; diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h index 5d9dd74..b1b2e64 100644 --- a/net/sunrpc/sunrpc.h +++ b/net/sunrpc/sunrpc.h @@ -33,5 +33,9 @@ static inline int rpc_reply_expected(struct rpc_task *task) (task->tk_msg.rpc_proc->p_decode != NULL); } +int svc_send_common(struct socket *sock, struct xdr_buf *xdr, + struct page *headpage, unsigned long headoffset, + struct page *tailpage, unsigned long tailoffset); + #endif /* _NET_SUNRPC_SUNRPC_H */ diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 5a5bc8b..258306e 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -49,6 +49,7 @@ #include #include #include +#include #define RPCDBG_FACILITY RPCDBG_SVCXPRT @@ -153,49 +154,27 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) } /* - * Generic sendto routine + * send routine intended to be shared by the fore- and back-channel */ -static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) +int svc_send_common(struct socket *sock, struct xdr_buf *xdr, + struct page *headpage, unsigned long headoffset, + struct page *tailpage, unsigned long tailoffset) { - struct svc_sock *svsk = - container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); - struct socket *sock = svsk->sk_sock; - int slen; - union { - struct cmsghdr hdr; - long all[SVC_PKTINFO_SPACE / sizeof(long)]; - } buffer; - struct cmsghdr *cmh = &buffer.hdr; - int len = 0; int result; int size; struct page **ppage = xdr->pages; size_t base = xdr->page_base; unsigned int pglen = xdr->page_len; unsigned int flags = MSG_MORE; - RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); + int slen; + int len = 0; slen = xdr->len; - if (rqstp->rq_prot == IPPROTO_UDP) { - struct msghdr msg = { - .msg_name = &rqstp->rq_addr, - .msg_namelen = rqstp->rq_addrlen, - .msg_control = cmh, - .msg_controllen = sizeof(buffer), - .msg_flags = MSG_MORE, - }; - - svc_set_cmsg_data(rqstp, cmh); - - if (sock_sendmsg(sock, &msg, 0) < 0) - goto out; - } - /* send head */ if (slen == xdr->head[0].iov_len) flags = 0; - len = kernel_sendpage(sock, rqstp->rq_respages[0], 0, + len = kernel_sendpage(sock, headpage, headoffset, xdr->head[0].iov_len, flags); if (len != xdr->head[0].iov_len) goto out; @@ -219,16 +198,58 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) base = 0; ppage++; } + /* send tail */ if (xdr->tail[0].iov_len) { - result = kernel_sendpage(sock, rqstp->rq_respages[0], - ((unsigned long)xdr->tail[0].iov_base) - & (PAGE_SIZE-1), - xdr->tail[0].iov_len, 0); - + result = kernel_sendpage(sock, tailpage, tailoffset, + xdr->tail[0].iov_len, 0); if (result > 0) len += result; } + +out: + return len; +} + + +/* + * Generic sendto routine + */ +static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) +{ + struct svc_sock *svsk = + container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); + struct socket *sock = svsk->sk_sock; + union { + struct cmsghdr hdr; + long all[SVC_PKTINFO_SPACE / sizeof(long)]; + } buffer; + struct cmsghdr *cmh = &buffer.hdr; + int len = 0; + unsigned long tailoff; + unsigned long headoff; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); + + if (rqstp->rq_prot == IPPROTO_UDP) { + struct msghdr msg = { + .msg_name = &rqstp->rq_addr, + .msg_namelen = rqstp->rq_addrlen, + .msg_control = cmh, + .msg_controllen = sizeof(buffer), + .msg_flags = MSG_MORE, + }; + + svc_set_cmsg_data(rqstp, cmh); + + if (sock_sendmsg(sock, &msg, 0) < 0) + goto out; + } + + tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1); + headoff = 0; + len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff, + rqstp->rq_respages[0], tailoff); + out: dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n", svsk, xdr->head[0].iov_base, xdr->head[0].iov_len, @@ -923,6 +944,57 @@ static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp) return -EAGAIN; } +static int svc_process_calldir(struct svc_sock *svsk, struct svc_rqst *rqstp, + struct rpc_rqst **reqpp, struct kvec *vec) +{ + struct rpc_rqst *req = NULL; + u32 *p; + u32 xid; + u32 calldir; + int len; + + len = svc_recvfrom(rqstp, vec, 1, 8); + if (len < 0) + goto error; + + p = (u32 *)rqstp->rq_arg.head[0].iov_base; + xid = *p++; + calldir = *p; + + if (calldir == 0) { + /* REQUEST is the most common case */ + vec[0] = rqstp->rq_arg.head[0]; + } else { + /* REPLY */ + if (svsk->sk_bc_xprt) + req = xprt_lookup_rqst(svsk->sk_bc_xprt, xid); + + if (!req) { + printk(KERN_NOTICE + "%s: Got unrecognized reply: " + "calldir 0x%x sk_bc_xprt %p xid %08x\n", + __func__, ntohl(calldir), + svsk->sk_bc_xprt, xid); + vec[0] = rqstp->rq_arg.head[0]; + goto out; + } + + memcpy(&req->rq_private_buf, &req->rq_rcv_buf, + sizeof(struct xdr_buf)); + /* copy the xid and call direction */ + memcpy(req->rq_private_buf.head[0].iov_base, + rqstp->rq_arg.head[0].iov_base, 8); + vec[0] = req->rq_private_buf.head[0]; + } + out: + vec[0].iov_base += 8; + vec[0].iov_len -= 8; + len = svsk->sk_reclen - 8; + error: + *reqpp = req; + return len; +} + /* * Receive data from a TCP socket. */ @@ -934,6 +1006,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) int len; struct kvec *vec; int pnum, vlen; + struct rpc_rqst *req = NULL; dprintk("svc: tcp_recv %p data %d conn %d close %d\n", svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags), @@ -947,9 +1020,27 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) vec = rqstp->rq_vec; vec[0] = rqstp->rq_arg.head[0]; vlen = PAGE_SIZE; + + /* + * We have enough data for the whole tcp record. Let's try and read the + * first 8 bytes to get the xid and the call direction. We can use this + * to figure out if this is a call or a reply to a callback. If + * sk_reclen is < 8 (xid and calldir), then this is a malformed packet. + * In that case, don't bother with the calldir and just read the data. + * It will be rejected in svc_process. + */ + if (len >= 8) { + len = svc_process_calldir(svsk, rqstp, &req, vec); + if (len < 0) + goto err_again; + vlen -= 8; + } + pnum = 1; while (vlen < len) { - vec[pnum].iov_base = page_address(rqstp->rq_pages[pnum]); + vec[pnum].iov_base = (req) ? + page_address(req->rq_private_buf.pages[pnum - 1]) : + page_address(rqstp->rq_pages[pnum]); vec[pnum].iov_len = PAGE_SIZE; pnum++; vlen += PAGE_SIZE; @@ -961,6 +1052,16 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) if (len < 0) goto err_again; + /* + * Account for the 8 bytes we read earlier + */ + len += 8; + + if (req) { + xprt_complete_rqst(req->rq_task, len); + len = 0; + goto out; + } dprintk("svc: TCP complete record (%d bytes)\n", len); rqstp->rq_arg.len = len; rqstp->rq_arg.page_base = 0; @@ -974,6 +1075,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) rqstp->rq_xprt_ctxt = NULL; rqstp->rq_prot = IPPROTO_TCP; +out: /* Reset TCP read info */ svsk->sk_reclen = 0; svsk->sk_tcplen = 0; diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index f412a85..b6d4d0d 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -599,6 +599,9 @@ static void xprt_autoclose(struct work_struct *work) struct rpc_xprt *xprt = container_of(work, struct rpc_xprt, task_cleanup); + if (xprt_server_backchannel(xprt)) + return; + xprt->ops->close(xprt); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); xprt_release_write(xprt, NULL); @@ -669,6 +672,9 @@ xprt_init_autodisconnect(unsigned long data) { struct rpc_xprt *xprt = (struct rpc_xprt *)data; + if (xprt_server_backchannel(xprt)) + return; + spin_lock(&xprt->transport_lock); if (!list_empty(&xprt->recv) || xprt->shutdown) goto out_abort; @@ -1083,7 +1089,8 @@ found: INIT_WORK(&xprt->task_cleanup, xprt_autoclose); setup_timer(&xprt->timer, xprt_init_autodisconnect, - (unsigned long)xprt); + (unsigned long)xprt); + xprt->last_used = jiffies; xprt->cwnd = RPC_INITCWND; xprt->bind_index = 0; @@ -1103,6 +1110,13 @@ found: dprintk("RPC: created transport %p with %u slots\n", xprt, xprt->max_reqs); + /* + * Since we don't want connections for the backchannel, we set + * the xprt status to connected + */ + if (args->bc_xprt) + xprt_set_connected(xprt); + return xprt; } diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 83c73c4..6e6f939 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #ifdef CONFIG_NFS_V4_1 @@ -43,6 +44,7 @@ #include #include +#include "sunrpc.h" /* * xprtsock tunables */ @@ -2156,6 +2158,133 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) xprt->stat.bklog_u); } +struct rpc_buffer { + size_t len; + char data[]; +}; +/* + * Allocate a bunch of pages for a scratch buffer for the rpc code. The reason + * we allocate pages instead doing a kmalloc like rpc_malloc is because we want + * to use the server side send routines. + */ +void *bc_malloc(struct rpc_task *task, size_t size) +{ + struct page *page; + struct rpc_buffer *buf; + + BUG_ON(size > PAGE_SIZE - sizeof(struct rpc_buffer)); + page = alloc_page(GFP_KERNEL); + + if (!page) + return NULL; + + buf = page_address(page); + buf->len = PAGE_SIZE; + + return buf->data; +} + +/* + * Free the space allocated in the bc_alloc routine + */ +void bc_free(void *buffer) +{ + struct rpc_buffer *buf; + + if (!buffer) + return; + + buf = container_of(buffer, struct rpc_buffer, data); + free_page((unsigned long)buf); +} + +/* + * Use the svc_sock to send the callback. Must be called with svsk->sk_mutex + * held. Borrows heavily from svc_tcp_sendto and xs_tcp_semd_request. + */ +static int bc_sendto(struct rpc_rqst *req) +{ + int len; + struct xdr_buf *xbufp = &req->rq_snd_buf; + struct rpc_xprt *xprt = req->rq_xprt; + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + struct socket *sock = transport->sock; + unsigned long headoff; + unsigned long tailoff; + + /* + * Set up the rpc header and record marker stuff + */ + xs_encode_tcp_record_marker(xbufp); + + tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK; + headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK; + len = svc_send_common(sock, xbufp, + virt_to_page(xbufp->head[0].iov_base), headoff, + xbufp->tail[0].iov_base, tailoff); + + if (len != xbufp->len) { + printk(KERN_NOTICE "Error sending entire callback!\n"); + len = -EAGAIN; + } + + return len; +} + +/* + * The send routine. Borrows from svc_send + */ +static int bc_send_request(struct rpc_task *task) +{ + struct rpc_rqst *req = task->tk_rqstp; + struct svc_xprt *xprt; + struct svc_sock *svsk; + u32 len; + + dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid)); + /* + * Get the server socket associated with this callback xprt + */ + xprt = req->rq_xprt->bc_xprt; + svsk = container_of(xprt, struct svc_sock, sk_xprt); + + /* + * Grab the mutex to serialize data as the connection is shared + * with the fore channel + */ + mutex_lock(&xprt->xpt_mutex); + if (test_bit(XPT_DEAD, &xprt->xpt_flags)) + len = -ENOTCONN; + else + len = bc_sendto(req); + mutex_unlock(&xprt->xpt_mutex); + + if (len > 0) + len = 0; + + return len; +} + +/* + * The close routine. Since this is client initiated, we do nothing + */ + +static void bc_close(struct rpc_xprt *xprt) +{ + return; +} + +/* + * The xprt destroy routine. Again, because this connection is client + * initiated, we do nothing + */ + +static void bc_destroy(struct rpc_xprt *xprt) +{ + return; +} + static struct rpc_xprt_ops xs_udp_ops = { .set_buffer_size = xs_udp_set_buffer_size, .reserve_xprt = xprt_reserve_xprt_cong, @@ -2192,6 +2321,22 @@ static struct rpc_xprt_ops xs_tcp_ops = { .print_stats = xs_tcp_print_stats, }; +/* + * The rpc_xprt_ops for the server backchannel + */ + +static struct rpc_xprt_ops bc_tcp_ops = { + .reserve_xprt = xprt_reserve_xprt, + .release_xprt = xprt_release_xprt, + .buf_alloc = bc_malloc, + .buf_free = bc_free, + .send_request = bc_send_request, + .set_retrans_timeout = xprt_set_retrans_timeout_def, + .close = bc_close, + .destroy = bc_destroy, + .print_stats = xs_tcp_print_stats, +}; + static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, unsigned int slot_table_size) { @@ -2323,14 +2468,46 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) xprt->prot = IPPROTO_TCP; xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; + xprt->timeout = &xs_tcp_default_timeout; - xprt->bind_timeout = XS_BIND_TO; - xprt->connect_timeout = XS_TCP_CONN_TO; - xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; - xprt->idle_timeout = XS_IDLE_DISC_TO; + if (args->bc_xprt) { + struct svc_sock *bc_sock; - xprt->ops = &xs_tcp_ops; - xprt->timeout = &xs_tcp_default_timeout; + /* backchannel */ + xprt_set_bound(xprt); + xprt->bind_timeout = 0; + xprt->connect_timeout = 0; + xprt->reestablish_timeout = 0; + xprt->idle_timeout = (~0); + + /* + * The backchannel uses the same socket connection as the + * forechannel + */ + xprt->bc_xprt = args->bc_xprt; + bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt); + bc_sock->sk_bc_xprt = xprt; + transport->sock = bc_sock->sk_sock; + transport->inet = bc_sock->sk_sk; + + xprt->ops = &bc_tcp_ops; + + switch (addr->sa_family) { + case AF_INET: + xs_format_ipv4_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP); + break; + case AF_INET6: + xs_format_ipv6_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP6); + break; + default: + kfree(xprt); + return ERR_PTR(-EAFNOSUPPORT); + } + + goto out; + } switch (addr->sa_family) { case AF_INET: @@ -2338,20 +2515,30 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) xprt_set_bound(xprt); INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker4); - xs_format_ipv4_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP); + xs_format_ipv4_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP); break; case AF_INET6: if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) xprt_set_bound(xprt); INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_connect_worker6); - xs_format_ipv6_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6); + xs_format_ipv6_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP); break; default: kfree(xprt); return ERR_PTR(-EAFNOSUPPORT); } + xprt->bind_timeout = XS_BIND_TO; + xprt->connect_timeout = XS_TCP_CONN_TO; + xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; + xprt->idle_timeout = XS_IDLE_DISC_TO; + + xprt->ops = &xs_tcp_ops; + +out: dprintk("RPC: set up transport to address %s\n", xprt->address_strings[RPC_DISPLAY_ALL]); -- 1.6.4