2019-05-19 14:08:55 +02:00
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// SPDX-License-Identifier: GPL-2.0-only
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2005-04-17 00:20:36 +02:00
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/*
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* linux/net/sunrpc/svcsock.c
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*
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* These are the RPC server socket internals.
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*
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* The server scheduling algorithm does not always distribute the load
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* evenly when servicing a single client. May need to modify the
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2007-12-31 04:07:57 +01:00
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* svc_xprt_enqueue procedure...
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2005-04-17 00:20:36 +02:00
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*
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* TCP support is largely untested and may be a little slow. The problem
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* is that we currently do two separate recvfrom's, one for the 4-byte
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* record length, and the second for the actual record. This could possibly
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* be improved by always reading a minimum size of around 100 bytes and
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* tucking any superfluous bytes away in a temporary store. Still, that
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* leaves write requests out in the rain. An alternative may be to peek at
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* the first skb in the queue, and if it matches the next TCP sequence
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* number, to extract the record marker. Yuck.
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*
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* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
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*/
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2007-08-29 00:50:33 +02:00
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#include <linux/kernel.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/sched.h>
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2011-05-27 15:12:25 +02:00
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#include <linux/module.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/errno.h>
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#include <linux/fcntl.h>
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#include <linux/net.h>
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/udp.h>
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2005-08-10 05:20:07 +02:00
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#include <linux/tcp.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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2006-10-02 11:17:48 +02:00
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#include <linux/file.h>
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2006-12-07 05:34:23 +01:00
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#include <linux/freezer.h>
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2005-04-17 00:20:36 +02:00
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#include <net/sock.h>
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#include <net/checksum.h>
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#include <net/ip.h>
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2007-02-12 09:53:36 +01:00
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#include <net/ipv6.h>
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2016-10-21 13:55:47 +02:00
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#include <net/udp.h>
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2008-04-14 18:27:01 +02:00
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#include <net/tcp.h>
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2005-08-10 05:08:28 +02:00
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#include <net/tcp_states.h>
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2016-12-24 20:46:01 +01:00
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#include <linux/uaccess.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/ioctls.h>
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2012-06-27 02:23:44 +02:00
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#include <trace/events/skb.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/sunrpc/types.h>
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2007-02-12 09:53:32 +01:00
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#include <linux/sunrpc/clnt.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/sunrpc/xdr.h>
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2008-04-14 18:27:30 +02:00
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#include <linux/sunrpc/msg_prot.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/stats.h>
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2009-09-10 16:32:28 +02:00
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#include <linux/sunrpc/xprt.h>
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2005-04-17 00:20:36 +02:00
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2011-06-21 02:54:51 +02:00
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#include "sunrpc.h"
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2007-12-31 04:07:17 +01:00
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#define RPCDBG_FACILITY RPCDBG_SVCXPRT
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2005-04-17 00:20:36 +02:00
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static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
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2012-08-13 23:46:17 +02:00
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int flags);
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2005-04-17 00:20:36 +02:00
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static int svc_udp_recvfrom(struct svc_rqst *);
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static int svc_udp_sendto(struct svc_rqst *);
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2007-12-31 04:07:27 +01:00
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static void svc_sock_detach(struct svc_xprt *);
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2008-12-23 22:30:11 +01:00
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static void svc_tcp_sock_detach(struct svc_xprt *);
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2007-12-31 04:07:27 +01:00
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static void svc_sock_free(struct svc_xprt *);
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2005-04-17 00:20:36 +02:00
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2007-12-31 04:07:42 +01:00
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static struct svc_xprt *svc_create_socket(struct svc_serv *, int,
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2010-09-29 14:04:18 +02:00
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struct net *, struct sockaddr *,
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int, int);
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2006-12-07 05:35:24 +01:00
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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static struct lock_class_key svc_key[2];
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static struct lock_class_key svc_slock_key[2];
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2007-12-31 04:08:27 +01:00
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static void svc_reclassify_socket(struct socket *sock)
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2006-12-07 05:35:24 +01:00
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{
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struct sock *sk = sock->sk;
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2012-10-23 16:43:39 +02:00
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2016-04-08 15:11:27 +02:00
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if (WARN_ON_ONCE(!sock_allow_reclassification(sk)))
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2012-10-23 16:43:39 +02:00
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return;
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2006-12-07 05:35:24 +01:00
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switch (sk->sk_family) {
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case AF_INET:
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sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD",
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2007-12-31 04:08:08 +01:00
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&svc_slock_key[0],
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"sk_xprt.xpt_lock-AF_INET-NFSD",
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&svc_key[0]);
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2006-12-07 05:35:24 +01:00
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break;
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case AF_INET6:
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sock_lock_init_class_and_name(sk, "slock-AF_INET6-NFSD",
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2007-12-31 04:08:08 +01:00
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&svc_slock_key[1],
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"sk_xprt.xpt_lock-AF_INET6-NFSD",
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&svc_key[1]);
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2006-12-07 05:35:24 +01:00
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break;
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default:
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BUG();
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}
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}
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#else
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2007-12-31 04:08:27 +01:00
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static void svc_reclassify_socket(struct socket *sock)
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2006-12-07 05:35:24 +01:00
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{
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}
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#endif
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2005-04-17 00:20:36 +02:00
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/*
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* Release an skbuff after use
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*/
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2007-12-31 04:07:25 +01:00
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static void svc_release_skb(struct svc_rqst *rqstp)
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2005-04-17 00:20:36 +02:00
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{
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2007-12-31 04:07:25 +01:00
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struct sk_buff *skb = rqstp->rq_xprt_ctxt;
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2005-04-17 00:20:36 +02:00
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if (skb) {
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2007-12-31 04:08:22 +01:00
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struct svc_sock *svsk =
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container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
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2007-12-31 04:07:25 +01:00
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rqstp->rq_xprt_ctxt = NULL;
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2005-04-17 00:20:36 +02:00
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dprintk("svc: service %p, releasing skb %p\n", rqstp, skb);
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2009-10-30 06:03:53 +01:00
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skb_free_datagram_locked(svsk->sk_sk, skb);
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2005-04-17 00:20:36 +02:00
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}
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}
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2016-10-21 13:55:47 +02:00
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static void svc_release_udp_skb(struct svc_rqst *rqstp)
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{
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struct sk_buff *skb = rqstp->rq_xprt_ctxt;
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if (skb) {
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rqstp->rq_xprt_ctxt = NULL;
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dprintk("svc: service %p, releasing skb %p\n", rqstp, skb);
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consume_skb(skb);
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}
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}
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2007-02-12 09:53:36 +01:00
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union svc_pktinfo_u {
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struct in_pktinfo pkti;
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struct in6_pktinfo pkti6;
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};
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2007-04-12 22:35:59 +02:00
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#define SVC_PKTINFO_SPACE \
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CMSG_SPACE(sizeof(union svc_pktinfo_u))
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2007-02-12 09:53:36 +01:00
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static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
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{
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2007-12-31 04:08:22 +01:00
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struct svc_sock *svsk =
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container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
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switch (svsk->sk_sk->sk_family) {
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2007-02-12 09:53:36 +01:00
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case AF_INET: {
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struct in_pktinfo *pki = CMSG_DATA(cmh);
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cmh->cmsg_level = SOL_IP;
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cmh->cmsg_type = IP_PKTINFO;
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pki->ipi_ifindex = 0;
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2011-08-30 11:18:41 +02:00
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pki->ipi_spec_dst.s_addr =
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svc_daddr_in(rqstp)->sin_addr.s_addr;
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2007-02-12 09:53:36 +01:00
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cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
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}
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break;
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2007-03-06 10:42:22 +01:00
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2007-02-12 09:53:36 +01:00
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case AF_INET6: {
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struct in6_pktinfo *pki = CMSG_DATA(cmh);
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2011-08-30 11:18:41 +02:00
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struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp);
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2007-02-12 09:53:36 +01:00
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cmh->cmsg_level = SOL_IPV6;
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cmh->cmsg_type = IPV6_PKTINFO;
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2011-08-30 11:18:41 +02:00
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pki->ipi6_ifindex = daddr->sin6_scope_id;
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2011-11-21 04:39:03 +01:00
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pki->ipi6_addr = daddr->sin6_addr;
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2007-02-12 09:53:36 +01:00
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cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
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}
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break;
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}
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}
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2005-04-17 00:20:36 +02:00
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/*
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2009-09-10 16:32:28 +02:00
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* send routine intended to be shared by the fore- and back-channel
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2005-04-17 00:20:36 +02:00
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*/
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2009-09-10 16:32:28 +02:00
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int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
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struct page *headpage, unsigned long headoffset,
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struct page *tailpage, unsigned long tailoffset)
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2005-04-17 00:20:36 +02:00
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{
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int result;
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int size;
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struct page **ppage = xdr->pages;
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size_t base = xdr->page_base;
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unsigned int pglen = xdr->page_len;
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2015-10-07 19:54:42 +02:00
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unsigned int flags = MSG_MORE | MSG_SENDPAGE_NOTLAST;
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2009-09-10 16:32:28 +02:00
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int slen;
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int len = 0;
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2005-04-17 00:20:36 +02:00
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slen = xdr->len;
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/* send head */
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if (slen == xdr->head[0].iov_len)
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flags = 0;
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2009-09-10 16:32:28 +02:00
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len = kernel_sendpage(sock, headpage, headoffset,
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2006-10-04 11:15:46 +02:00
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xdr->head[0].iov_len, flags);
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2005-04-17 00:20:36 +02:00
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if (len != xdr->head[0].iov_len)
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goto out;
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slen -= xdr->head[0].iov_len;
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if (slen == 0)
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goto out;
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/* send page data */
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size = PAGE_SIZE - base < pglen ? PAGE_SIZE - base : pglen;
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while (pglen > 0) {
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if (slen == size)
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flags = 0;
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2006-08-08 05:58:01 +02:00
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result = kernel_sendpage(sock, *ppage, base, size, flags);
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2005-04-17 00:20:36 +02:00
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if (result > 0)
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len += result;
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if (result != size)
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goto out;
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slen -= size;
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pglen -= size;
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size = PAGE_SIZE < pglen ? PAGE_SIZE : pglen;
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base = 0;
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ppage++;
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}
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2009-09-10 16:32:28 +02:00
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2005-04-17 00:20:36 +02:00
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/* send tail */
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if (xdr->tail[0].iov_len) {
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2009-09-10 16:32:28 +02:00
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result = kernel_sendpage(sock, tailpage, tailoffset,
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xdr->tail[0].iov_len, 0);
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2005-04-17 00:20:36 +02:00
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if (result > 0)
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len += result;
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}
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2009-09-10 16:32:28 +02:00
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out:
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return len;
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}
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/*
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* Generic sendto routine
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*/
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static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
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{
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struct svc_sock *svsk =
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container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
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struct socket *sock = svsk->sk_sock;
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union {
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struct cmsghdr hdr;
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long all[SVC_PKTINFO_SPACE / sizeof(long)];
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} buffer;
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struct cmsghdr *cmh = &buffer.hdr;
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int len = 0;
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unsigned long tailoff;
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unsigned long headoff;
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RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
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if (rqstp->rq_prot == IPPROTO_UDP) {
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struct msghdr msg = {
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.msg_name = &rqstp->rq_addr,
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.msg_namelen = rqstp->rq_addrlen,
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.msg_control = cmh,
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.msg_controllen = sizeof(buffer),
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.msg_flags = MSG_MORE,
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};
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svc_set_cmsg_data(rqstp, cmh);
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2014-12-11 06:02:50 +01:00
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if (sock_sendmsg(sock, &msg) < 0)
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2009-09-10 16:32:28 +02:00
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goto out;
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}
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tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1);
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headoff = 0;
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len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff,
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rqstp->rq_respages[0], tailoff);
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2005-04-17 00:20:36 +02:00
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out:
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2017-02-27 23:30:02 +01:00
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dprintk("svc: socket %p sendto([%p %zu... ], %d) = %d (addr %s)\n",
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2007-12-31 04:08:22 +01:00
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svsk, xdr->head[0].iov_base, xdr->head[0].iov_len,
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2007-02-12 09:53:32 +01:00
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xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
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2005-04-17 00:20:36 +02:00
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return len;
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}
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2006-10-02 11:17:47 +02:00
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/*
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* Report socket names for nfsdfs
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*/
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2009-04-24 01:32:48 +02:00
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static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining)
|
2006-10-02 11:17:47 +02:00
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{
|
2009-04-24 01:33:03 +02:00
|
|
|
const struct sock *sk = svsk->sk_sk;
|
|
|
|
const char *proto_name = sk->sk_protocol == IPPROTO_UDP ?
|
|
|
|
"udp" : "tcp";
|
2006-10-02 11:17:47 +02:00
|
|
|
int len;
|
|
|
|
|
2009-04-24 01:33:03 +02:00
|
|
|
switch (sk->sk_family) {
|
2009-04-24 01:32:48 +02:00
|
|
|
case PF_INET:
|
|
|
|
len = snprintf(buf, remaining, "ipv4 %s %pI4 %d\n",
|
2009-04-24 01:33:03 +02:00
|
|
|
proto_name,
|
2009-10-15 08:30:45 +02:00
|
|
|
&inet_sk(sk)->inet_rcv_saddr,
|
|
|
|
inet_sk(sk)->inet_num);
|
2006-10-02 11:17:47 +02:00
|
|
|
break;
|
2013-10-09 12:05:48 +02:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
2009-04-24 01:32:55 +02:00
|
|
|
case PF_INET6:
|
|
|
|
len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n",
|
2009-04-24 01:33:03 +02:00
|
|
|
proto_name,
|
ipv6: make lookups simpler and faster
TCP listener refactoring, part 4 :
To speed up inet lookups, we moved IPv4 addresses from inet to struct
sock_common
Now is time to do the same for IPv6, because it permits us to have fast
lookups for all kind of sockets, including upcoming SYN_RECV.
Getting IPv6 addresses in TCP lookups currently requires two extra cache
lines, plus a dereference (and memory stall).
inet6_sk(sk) does the dereference of inet_sk(__sk)->pinet6
This patch is way bigger than its IPv4 counter part, because for IPv4,
we could add aliases (inet_daddr, inet_rcv_saddr), while on IPv6,
it's not doable easily.
inet6_sk(sk)->daddr becomes sk->sk_v6_daddr
inet6_sk(sk)->rcv_saddr becomes sk->sk_v6_rcv_saddr
And timewait socket also have tw->tw_v6_daddr & tw->tw_v6_rcv_saddr
at the same offset.
We get rid of INET6_TW_MATCH() as INET6_MATCH() is now the generic
macro.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-04 00:42:29 +02:00
|
|
|
&sk->sk_v6_rcv_saddr,
|
2009-10-15 08:30:45 +02:00
|
|
|
inet_sk(sk)->inet_num);
|
2006-10-02 11:17:47 +02:00
|
|
|
break;
|
2013-10-09 12:05:48 +02:00
|
|
|
#endif
|
2006-10-02 11:17:47 +02:00
|
|
|
default:
|
2009-04-24 01:32:48 +02:00
|
|
|
len = snprintf(buf, remaining, "*unknown-%d*\n",
|
2009-04-24 01:33:03 +02:00
|
|
|
sk->sk_family);
|
2006-10-02 11:17:47 +02:00
|
|
|
}
|
2009-04-24 01:32:48 +02:00
|
|
|
|
|
|
|
if (len >= remaining) {
|
|
|
|
*buf = '\0';
|
|
|
|
return -ENAMETOOLONG;
|
2006-10-02 11:17:47 +02:00
|
|
|
}
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Generic recvfrom routine.
|
|
|
|
*/
|
2018-10-01 16:41:53 +02:00
|
|
|
static ssize_t svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov,
|
|
|
|
unsigned int nr, size_t buflen, unsigned int base)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2007-12-31 04:08:22 +01:00
|
|
|
struct svc_sock *svsk =
|
|
|
|
container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
|
2018-10-01 16:41:53 +02:00
|
|
|
struct msghdr msg = { NULL };
|
|
|
|
ssize_t len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:08:29 +01:00
|
|
|
rqstp->rq_xprt_hlen = 0;
|
|
|
|
|
2014-08-03 19:03:13 +02:00
|
|
|
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2018-10-20 01:57:56 +02:00
|
|
|
iov_iter_kvec(&msg.msg_iter, READ, iov, nr, buflen);
|
2018-10-01 16:41:53 +02:00
|
|
|
if (base != 0) {
|
|
|
|
iov_iter_advance(&msg.msg_iter, base);
|
|
|
|
buflen -= base;
|
|
|
|
}
|
|
|
|
len = sock_recvmsg(svsk->sk_sock, &msg, MSG_DONTWAIT);
|
2014-08-03 19:03:13 +02:00
|
|
|
/* If we read a full record, then assume there may be more
|
|
|
|
* data to read (stream based sockets only!)
|
|
|
|
*/
|
|
|
|
if (len == buflen)
|
|
|
|
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2018-10-01 16:41:53 +02:00
|
|
|
dprintk("svc: socket %p recvfrom(%p, %zu) = %zd\n",
|
2007-02-12 09:53:31 +01:00
|
|
|
svsk, iov[0].iov_base, iov[0].iov_len, len);
|
2005-04-17 00:20:36 +02:00
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set socket snd and rcv buffer lengths
|
|
|
|
*/
|
2019-02-20 18:54:50 +01:00
|
|
|
static void svc_sock_setbufsize(struct svc_sock *svsk, unsigned int nreqs)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2019-02-20 18:54:50 +01:00
|
|
|
unsigned int max_mesg = svsk->sk_xprt.xpt_server->sv_max_mesg;
|
|
|
|
struct socket *sock = svsk->sk_sock;
|
|
|
|
|
|
|
|
nreqs = min(nreqs, INT_MAX / 2 / max_mesg);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
lock_sock(sock->sk);
|
2019-02-20 18:54:50 +01:00
|
|
|
sock->sk->sk_sndbuf = nreqs * max_mesg * 2;
|
|
|
|
sock->sk->sk_rcvbuf = nreqs * max_mesg * 2;
|
2009-05-18 23:47:56 +02:00
|
|
|
sock->sk->sk_write_space(sock->sk);
|
2005-04-17 00:20:36 +02:00
|
|
|
release_sock(sock->sk);
|
|
|
|
}
|
2014-05-19 19:40:22 +02:00
|
|
|
|
2018-03-27 16:49:38 +02:00
|
|
|
static void svc_sock_secure_port(struct svc_rqst *rqstp)
|
2014-05-19 19:40:22 +02:00
|
|
|
{
|
2018-03-27 16:49:38 +02:00
|
|
|
if (svc_port_is_privileged(svc_addr(rqstp)))
|
|
|
|
set_bit(RQ_SECURE, &rqstp->rq_flags);
|
|
|
|
else
|
|
|
|
clear_bit(RQ_SECURE, &rqstp->rq_flags);
|
2014-05-19 19:40:22 +02:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* INET callback when data has been received on the socket.
|
|
|
|
*/
|
2016-06-24 16:55:48 +02:00
|
|
|
static void svc_data_ready(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2005-09-13 10:25:39 +02:00
|
|
|
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2005-09-13 10:25:39 +02:00
|
|
|
if (svsk) {
|
2014-04-11 22:15:36 +02:00
|
|
|
dprintk("svc: socket %p(inet %p), busy=%d\n",
|
|
|
|
svsk, sk,
|
2007-12-31 04:07:48 +01:00
|
|
|
test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
|
2017-08-21 13:23:07 +02:00
|
|
|
|
|
|
|
/* Refer to svc_setup_socket() for details. */
|
|
|
|
rmb();
|
2016-06-24 16:55:48 +02:00
|
|
|
svsk->sk_odata(sk);
|
2016-06-24 16:55:49 +02:00
|
|
|
if (!test_and_set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags))
|
|
|
|
svc_xprt_enqueue(&svsk->sk_xprt);
|
2005-09-13 10:25:39 +02:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* INET callback when space is newly available on the socket.
|
|
|
|
*/
|
2007-12-31 04:08:27 +01:00
|
|
|
static void svc_write_space(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data);
|
|
|
|
|
|
|
|
if (svsk) {
|
|
|
|
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
|
2007-12-31 04:07:48 +01:00
|
|
|
svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
|
2017-08-21 13:23:07 +02:00
|
|
|
|
|
|
|
/* Refer to svc_setup_socket() for details. */
|
|
|
|
rmb();
|
2016-06-24 16:55:48 +02:00
|
|
|
svsk->sk_owspace(sk);
|
2007-12-31 04:07:57 +01:00
|
|
|
svc_xprt_enqueue(&svsk->sk_xprt);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-07-25 05:59:32 +02:00
|
|
|
static int svc_tcp_has_wspace(struct svc_xprt *xprt)
|
|
|
|
{
|
2016-06-24 16:55:51 +02:00
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
2014-07-25 05:59:32 +02:00
|
|
|
|
|
|
|
if (test_bit(XPT_LISTENER, &xprt->xpt_flags))
|
|
|
|
return 1;
|
2016-06-24 16:55:51 +02:00
|
|
|
return !test_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
|
2014-07-25 05:59:33 +02:00
|
|
|
}
|
|
|
|
|
2016-11-11 19:16:22 +01:00
|
|
|
static void svc_tcp_kill_temp_xprt(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk;
|
|
|
|
struct socket *sock;
|
|
|
|
struct linger no_linger = {
|
|
|
|
.l_onoff = 1,
|
|
|
|
.l_linger = 0,
|
|
|
|
};
|
|
|
|
|
|
|
|
svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
|
|
|
sock = svsk->sk_sock;
|
|
|
|
kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
|
|
|
|
(char *)&no_linger, sizeof(no_linger));
|
|
|
|
}
|
|
|
|
|
2009-07-13 16:54:26 +02:00
|
|
|
/*
|
|
|
|
* See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo
|
|
|
|
*/
|
|
|
|
static int svc_udp_get_dest_address4(struct svc_rqst *rqstp,
|
|
|
|
struct cmsghdr *cmh)
|
|
|
|
{
|
|
|
|
struct in_pktinfo *pki = CMSG_DATA(cmh);
|
2011-08-30 11:18:41 +02:00
|
|
|
struct sockaddr_in *daddr = svc_daddr_in(rqstp);
|
|
|
|
|
2009-07-13 16:54:26 +02:00
|
|
|
if (cmh->cmsg_type != IP_PKTINFO)
|
|
|
|
return 0;
|
2011-08-30 11:18:41 +02:00
|
|
|
|
|
|
|
daddr->sin_family = AF_INET;
|
|
|
|
daddr->sin_addr.s_addr = pki->ipi_spec_dst.s_addr;
|
2009-07-13 16:54:26 +02:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2013-01-31 02:02:24 +01:00
|
|
|
* See net/ipv6/datagram.c : ip6_datagram_recv_ctl
|
2009-07-13 16:54:26 +02:00
|
|
|
*/
|
|
|
|
static int svc_udp_get_dest_address6(struct svc_rqst *rqstp,
|
|
|
|
struct cmsghdr *cmh)
|
|
|
|
{
|
|
|
|
struct in6_pktinfo *pki = CMSG_DATA(cmh);
|
2011-08-30 11:18:41 +02:00
|
|
|
struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp);
|
|
|
|
|
2009-07-13 16:54:26 +02:00
|
|
|
if (cmh->cmsg_type != IPV6_PKTINFO)
|
|
|
|
return 0;
|
2011-08-30 11:18:41 +02:00
|
|
|
|
|
|
|
daddr->sin6_family = AF_INET6;
|
2011-11-21 04:39:03 +01:00
|
|
|
daddr->sin6_addr = pki->ipi6_addr;
|
2011-08-30 11:18:41 +02:00
|
|
|
daddr->sin6_scope_id = pki->ipi6_ifindex;
|
2009-07-13 16:54:26 +02:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:08:12 +01:00
|
|
|
/*
|
|
|
|
* Copy the UDP datagram's destination address to the rqstp structure.
|
|
|
|
* The 'destination' address in this case is the address to which the
|
|
|
|
* peer sent the datagram, i.e. our local address. For multihomed
|
|
|
|
* hosts, this can change from msg to msg. Note that only the IP
|
|
|
|
* address changes, the port number should remain the same.
|
|
|
|
*/
|
2009-07-13 16:54:26 +02:00
|
|
|
static int svc_udp_get_dest_address(struct svc_rqst *rqstp,
|
|
|
|
struct cmsghdr *cmh)
|
2007-02-12 09:53:38 +01:00
|
|
|
{
|
2009-07-13 16:54:26 +02:00
|
|
|
switch (cmh->cmsg_level) {
|
|
|
|
case SOL_IP:
|
|
|
|
return svc_udp_get_dest_address4(rqstp, cmh);
|
|
|
|
case SOL_IPV6:
|
|
|
|
return svc_udp_get_dest_address6(rqstp, cmh);
|
2007-02-12 09:53:38 +01:00
|
|
|
}
|
2009-07-13 16:54:26 +02:00
|
|
|
|
|
|
|
return 0;
|
2007-02-12 09:53:38 +01:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Receive a datagram from a UDP socket.
|
|
|
|
*/
|
2007-12-31 04:08:27 +01:00
|
|
|
static int svc_udp_recvfrom(struct svc_rqst *rqstp)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2007-12-31 04:08:22 +01:00
|
|
|
struct svc_sock *svsk =
|
|
|
|
container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
|
2007-12-31 04:07:50 +01:00
|
|
|
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct sk_buff *skb;
|
2007-04-12 22:35:59 +02:00
|
|
|
union {
|
|
|
|
struct cmsghdr hdr;
|
|
|
|
long all[SVC_PKTINFO_SPACE / sizeof(long)];
|
|
|
|
} buffer;
|
|
|
|
struct cmsghdr *cmh = &buffer.hdr;
|
2007-03-06 10:42:21 +01:00
|
|
|
struct msghdr msg = {
|
|
|
|
.msg_name = svc_addr(rqstp),
|
|
|
|
.msg_control = cmh,
|
|
|
|
.msg_controllen = sizeof(buffer),
|
|
|
|
.msg_flags = MSG_DONTWAIT,
|
|
|
|
};
|
2009-04-24 01:31:25 +02:00
|
|
|
size_t len;
|
|
|
|
int err;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:07:48 +01:00
|
|
|
if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
|
2005-04-17 00:20:36 +02:00
|
|
|
/* udp sockets need large rcvbuf as all pending
|
|
|
|
* requests are still in that buffer. sndbuf must
|
|
|
|
* also be large enough that there is enough space
|
2006-10-02 11:17:58 +02:00
|
|
|
* for one reply per thread. We count all threads
|
|
|
|
* rather than threads in a particular pool, which
|
|
|
|
* provides an upper bound on the number of threads
|
|
|
|
* which will access the socket.
|
2005-04-17 00:20:36 +02:00
|
|
|
*/
|
2019-02-20 18:54:50 +01:00
|
|
|
svc_sock_setbufsize(svsk, serv->sv_nrthreads + 3);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:07:48 +01:00
|
|
|
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2007-05-09 11:34:55 +02:00
|
|
|
skb = NULL;
|
|
|
|
err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
|
|
|
|
0, 0, MSG_PEEK | MSG_DONTWAIT);
|
|
|
|
if (err >= 0)
|
2016-11-04 11:28:59 +01:00
|
|
|
skb = skb_recv_udp(svsk->sk_sk, 0, 1, &err);
|
2007-05-09 11:34:55 +02:00
|
|
|
|
|
|
|
if (skb == NULL) {
|
|
|
|
if (err != -EAGAIN) {
|
|
|
|
/* possibly an icmp error */
|
|
|
|
dprintk("svc: recvfrom returned error %d\n", -err);
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2012-08-18 03:35:24 +02:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2007-12-31 04:08:12 +01:00
|
|
|
len = svc_addr_len(svc_addr(rqstp));
|
|
|
|
rqstp->rq_addrlen = len;
|
2016-12-25 11:38:40 +01:00
|
|
|
if (skb->tstamp == 0) {
|
2007-04-20 01:16:32 +02:00
|
|
|
skb->tstamp = ktime_get_real();
|
2007-02-10 00:38:13 +01:00
|
|
|
/* Don't enable netstamp, sunrpc doesn't
|
2005-04-17 00:20:36 +02:00
|
|
|
need that much accuracy */
|
|
|
|
}
|
2018-12-28 03:55:09 +01:00
|
|
|
sock_write_timestamp(svsk->sk_sk, skb->tstamp);
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2016-04-07 17:44:58 +02:00
|
|
|
len = skb->len;
|
2005-04-17 00:20:36 +02:00
|
|
|
rqstp->rq_arg.len = len;
|
|
|
|
|
2007-02-12 09:53:38 +01:00
|
|
|
rqstp->rq_prot = IPPROTO_UDP;
|
2007-02-12 09:53:34 +01:00
|
|
|
|
2009-07-13 16:54:26 +02:00
|
|
|
if (!svc_udp_get_dest_address(rqstp, cmh)) {
|
2012-05-13 23:56:26 +02:00
|
|
|
net_warn_ratelimited("svc: received unknown control message %d/%d; dropping RPC reply datagram\n",
|
|
|
|
cmh->cmsg_level, cmh->cmsg_type);
|
2012-08-18 02:32:27 +02:00
|
|
|
goto out_free;
|
2007-03-06 10:42:21 +01:00
|
|
|
}
|
2011-08-30 11:18:41 +02:00
|
|
|
rqstp->rq_daddrlen = svc_addr_len(svc_daddr(rqstp));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (skb_is_nonlinear(skb)) {
|
|
|
|
/* we have to copy */
|
|
|
|
local_bh_disable();
|
|
|
|
if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) {
|
|
|
|
local_bh_enable();
|
|
|
|
/* checksum error */
|
2012-06-27 02:23:44 +02:00
|
|
|
goto out_free;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
local_bh_enable();
|
2016-10-21 13:55:47 +02:00
|
|
|
consume_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
|
|
|
/* we can use it in-place */
|
2016-04-07 17:44:58 +02:00
|
|
|
rqstp->rq_arg.head[0].iov_base = skb->data;
|
2005-04-17 00:20:36 +02:00
|
|
|
rqstp->rq_arg.head[0].iov_len = len;
|
2012-06-27 02:23:44 +02:00
|
|
|
if (skb_checksum_complete(skb))
|
|
|
|
goto out_free;
|
2007-12-31 04:07:25 +01:00
|
|
|
rqstp->rq_xprt_ctxt = skb;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
rqstp->rq_arg.page_base = 0;
|
|
|
|
if (len <= rqstp->rq_arg.head[0].iov_len) {
|
|
|
|
rqstp->rq_arg.head[0].iov_len = len;
|
|
|
|
rqstp->rq_arg.page_len = 0;
|
2006-10-04 11:15:46 +02:00
|
|
|
rqstp->rq_respages = rqstp->rq_pages+1;
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
|
|
|
rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len;
|
2006-10-04 11:15:46 +02:00
|
|
|
rqstp->rq_respages = rqstp->rq_pages + 1 +
|
2007-08-29 00:50:33 +02:00
|
|
|
DIV_ROUND_UP(rqstp->rq_arg.page_len, PAGE_SIZE);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2012-12-11 00:01:37 +01:00
|
|
|
rqstp->rq_next_page = rqstp->rq_respages+1;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (serv->sv_stats)
|
|
|
|
serv->sv_stats->netudpcnt++;
|
|
|
|
|
|
|
|
return len;
|
2012-08-18 02:32:27 +02:00
|
|
|
out_free:
|
2016-10-21 13:55:47 +02:00
|
|
|
kfree_skb(skb);
|
2012-08-18 02:32:27 +02:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
svc_udp_sendto(struct svc_rqst *rqstp)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = svc_sendto(rqstp, &rqstp->rq_res);
|
|
|
|
if (error == -ECONNREFUSED)
|
|
|
|
/* ICMP error on earlier request. */
|
|
|
|
error = svc_sendto(rqstp, &rqstp->rq_res);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:31 +01:00
|
|
|
static int svc_udp_has_wspace(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
2007-12-31 04:07:50 +01:00
|
|
|
struct svc_serv *serv = xprt->xpt_server;
|
2007-12-31 04:07:31 +01:00
|
|
|
unsigned long required;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set the SOCK_NOSPACE flag before checking the available
|
|
|
|
* sock space.
|
|
|
|
*/
|
|
|
|
set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
|
2007-12-31 04:07:55 +01:00
|
|
|
required = atomic_read(&svsk->sk_xprt.xpt_reserved) + serv->sv_max_mesg;
|
2007-12-31 04:07:31 +01:00
|
|
|
if (required*2 > sock_wspace(svsk->sk_sk))
|
|
|
|
return 0;
|
|
|
|
clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:36 +01:00
|
|
|
static struct svc_xprt *svc_udp_accept(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
BUG();
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2016-11-11 19:16:22 +01:00
|
|
|
static void svc_udp_kill_temp_xprt(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:42 +01:00
|
|
|
static struct svc_xprt *svc_udp_create(struct svc_serv *serv,
|
2010-09-29 14:04:18 +02:00
|
|
|
struct net *net,
|
2007-12-31 04:07:42 +01:00
|
|
|
struct sockaddr *sa, int salen,
|
|
|
|
int flags)
|
|
|
|
{
|
2010-09-29 14:04:18 +02:00
|
|
|
return svc_create_socket(serv, IPPROTO_UDP, net, sa, salen, flags);
|
2007-12-31 04:07:42 +01:00
|
|
|
}
|
|
|
|
|
2017-08-01 17:59:49 +02:00
|
|
|
static const struct svc_xprt_ops svc_udp_ops = {
|
2007-12-31 04:07:42 +01:00
|
|
|
.xpo_create = svc_udp_create,
|
2007-12-31 04:07:23 +01:00
|
|
|
.xpo_recvfrom = svc_udp_recvfrom,
|
|
|
|
.xpo_sendto = svc_udp_sendto,
|
2016-10-21 13:55:47 +02:00
|
|
|
.xpo_release_rqst = svc_release_udp_skb,
|
2007-12-31 04:07:27 +01:00
|
|
|
.xpo_detach = svc_sock_detach,
|
|
|
|
.xpo_free = svc_sock_free,
|
2007-12-31 04:07:31 +01:00
|
|
|
.xpo_has_wspace = svc_udp_has_wspace,
|
2007-12-31 04:07:36 +01:00
|
|
|
.xpo_accept = svc_udp_accept,
|
2014-05-19 19:40:22 +02:00
|
|
|
.xpo_secure_port = svc_sock_secure_port,
|
2016-11-11 19:16:22 +01:00
|
|
|
.xpo_kill_temp_xprt = svc_udp_kill_temp_xprt,
|
2007-12-31 04:07:17 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct svc_xprt_class svc_udp_class = {
|
|
|
|
.xcl_name = "udp",
|
2007-12-31 04:07:42 +01:00
|
|
|
.xcl_owner = THIS_MODULE,
|
2007-12-31 04:07:17 +01:00
|
|
|
.xcl_ops = &svc_udp_ops,
|
2007-12-31 04:07:21 +01:00
|
|
|
.xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP,
|
2014-07-16 21:38:32 +02:00
|
|
|
.xcl_ident = XPRT_TRANSPORT_UDP,
|
2007-12-31 04:07:17 +01:00
|
|
|
};
|
|
|
|
|
2007-12-31 04:07:50 +01:00
|
|
|
static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2009-07-13 16:54:26 +02:00
|
|
|
int err, level, optname, one = 1;
|
2007-03-06 10:42:21 +01:00
|
|
|
|
2011-12-06 12:19:10 +01:00
|
|
|
svc_xprt_init(sock_net(svsk->sk_sock->sk), &svc_udp_class,
|
|
|
|
&svsk->sk_xprt, serv);
|
2007-12-31 04:08:08 +01:00
|
|
|
clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
|
2016-06-24 16:55:48 +02:00
|
|
|
svsk->sk_sk->sk_data_ready = svc_data_ready;
|
2005-04-17 00:20:36 +02:00
|
|
|
svsk->sk_sk->sk_write_space = svc_write_space;
|
|
|
|
|
|
|
|
/* initialise setting must have enough space to
|
2007-02-10 00:38:13 +01:00
|
|
|
* receive and respond to one request.
|
2005-04-17 00:20:36 +02:00
|
|
|
* svc_udp_recvfrom will re-adjust if necessary
|
|
|
|
*/
|
2019-02-20 18:54:50 +01:00
|
|
|
svc_sock_setbufsize(svsk, 3);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:08:27 +01:00
|
|
|
/* data might have come in before data_ready set up */
|
|
|
|
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
|
2007-03-06 10:42:21 +01:00
|
|
|
|
|
|
|
/* make sure we get destination address info */
|
2009-07-13 16:54:26 +02:00
|
|
|
switch (svsk->sk_sk->sk_family) {
|
|
|
|
case AF_INET:
|
|
|
|
level = SOL_IP;
|
|
|
|
optname = IP_PKTINFO;
|
|
|
|
break;
|
|
|
|
case AF_INET6:
|
|
|
|
level = SOL_IPV6;
|
|
|
|
optname = IPV6_RECVPKTINFO;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
err = kernel_setsockopt(svsk->sk_sock, level, optname,
|
|
|
|
(char *)&one, sizeof(one));
|
|
|
|
dprintk("svc: kernel_setsockopt returned %d\n", err);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* A data_ready event on a listening socket means there's a connection
|
|
|
|
* pending. Do not use state_change as a substitute for it.
|
|
|
|
*/
|
2014-04-11 22:15:36 +02:00
|
|
|
static void svc_tcp_listen_data_ready(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2005-09-13 10:25:39 +02:00
|
|
|
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dprintk("svc: socket %p TCP (listen) state change %d\n",
|
2005-09-13 10:25:39 +02:00
|
|
|
sk, sk->sk_state);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2017-08-21 13:23:07 +02:00
|
|
|
if (svsk) {
|
|
|
|
/* Refer to svc_setup_socket() for details. */
|
|
|
|
rmb();
|
2016-06-24 16:55:48 +02:00
|
|
|
svsk->sk_odata(sk);
|
2017-08-21 13:23:07 +02:00
|
|
|
}
|
|
|
|
|
2005-09-13 10:25:39 +02:00
|
|
|
/*
|
|
|
|
* This callback may called twice when a new connection
|
|
|
|
* is established as a child socket inherits everything
|
|
|
|
* from a parent LISTEN socket.
|
|
|
|
* 1) data_ready method of the parent socket will be called
|
|
|
|
* when one of child sockets become ESTABLISHED.
|
|
|
|
* 2) data_ready method of the child socket may be called
|
|
|
|
* when it receives data before the socket is accepted.
|
|
|
|
* In case of 2, we should ignore it silently.
|
|
|
|
*/
|
|
|
|
if (sk->sk_state == TCP_LISTEN) {
|
|
|
|
if (svsk) {
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
|
2007-12-31 04:07:57 +01:00
|
|
|
svc_xprt_enqueue(&svsk->sk_xprt);
|
2005-09-13 10:25:39 +02:00
|
|
|
} else
|
|
|
|
printk("svc: socket %p: no user data\n", sk);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* A state change on a connected socket means it's dying or dead.
|
|
|
|
*/
|
2007-12-31 04:08:27 +01:00
|
|
|
static void svc_tcp_state_change(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2005-09-13 10:25:39 +02:00
|
|
|
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n",
|
2005-09-13 10:25:39 +02:00
|
|
|
sk, sk->sk_state, sk->sk_user_data);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2005-09-13 10:25:39 +02:00
|
|
|
if (!svsk)
|
2005-04-17 00:20:36 +02:00
|
|
|
printk("svc: socket %p: no user data\n", sk);
|
2005-09-13 10:25:39 +02:00
|
|
|
else {
|
2017-08-21 13:23:07 +02:00
|
|
|
/* Refer to svc_setup_socket() for details. */
|
|
|
|
rmb();
|
2016-06-24 16:55:48 +02:00
|
|
|
svsk->sk_ostate(sk);
|
2016-07-26 15:51:19 +02:00
|
|
|
if (sk->sk_state != TCP_ESTABLISHED) {
|
|
|
|
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
|
|
|
|
svc_xprt_enqueue(&svsk->sk_xprt);
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Accept a TCP connection
|
|
|
|
*/
|
2007-12-31 04:07:36 +01:00
|
|
|
static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2007-12-31 04:07:36 +01:00
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
2007-02-12 09:53:38 +01:00
|
|
|
struct sockaddr_storage addr;
|
|
|
|
struct sockaddr *sin = (struct sockaddr *) &addr;
|
2007-12-31 04:07:50 +01:00
|
|
|
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct socket *sock = svsk->sk_sock;
|
|
|
|
struct socket *newsock;
|
|
|
|
struct svc_sock *newsvsk;
|
|
|
|
int err, slen;
|
2008-02-21 08:57:45 +01:00
|
|
|
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
|
|
|
|
if (!sock)
|
2007-12-31 04:07:36 +01:00
|
|
|
return NULL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:07:48 +01:00
|
|
|
clear_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
|
2006-08-08 05:58:01 +02:00
|
|
|
err = kernel_accept(sock, &newsock, O_NONBLOCK);
|
|
|
|
if (err < 0) {
|
2005-04-17 00:20:36 +02:00
|
|
|
if (err == -ENOMEM)
|
|
|
|
printk(KERN_WARNING "%s: no more sockets!\n",
|
|
|
|
serv->sv_name);
|
2012-05-13 23:56:26 +02:00
|
|
|
else if (err != -EAGAIN)
|
|
|
|
net_warn_ratelimited("%s: accept failed (err %d)!\n",
|
|
|
|
serv->sv_name, -err);
|
2007-12-31 04:07:36 +01:00
|
|
|
return NULL;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2018-02-12 20:00:20 +01:00
|
|
|
err = kernel_getpeername(newsock, sin);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (err < 0) {
|
2012-05-13 23:56:26 +02:00
|
|
|
net_warn_ratelimited("%s: peername failed (err %d)!\n",
|
|
|
|
serv->sv_name, -err);
|
2005-04-17 00:20:36 +02:00
|
|
|
goto failed; /* aborted connection or whatever */
|
|
|
|
}
|
2018-02-12 20:00:20 +01:00
|
|
|
slen = err;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Ideally, we would want to reject connections from unauthorized
|
2007-02-12 09:53:32 +01:00
|
|
|
* hosts here, but when we get encryption, the IP of the host won't
|
|
|
|
* tell us anything. For now just warn about unpriv connections.
|
2005-04-17 00:20:36 +02:00
|
|
|
*/
|
2007-02-12 09:53:38 +01:00
|
|
|
if (!svc_port_is_privileged(sin)) {
|
2014-05-29 06:18:52 +02:00
|
|
|
dprintk("%s: connect from unprivileged port: %s\n",
|
2007-02-10 00:38:13 +01:00
|
|
|
serv->sv_name,
|
2007-02-12 09:53:38 +01:00
|
|
|
__svc_print_addr(sin, buf, sizeof(buf)));
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2007-02-12 09:53:32 +01:00
|
|
|
dprintk("%s: connect from %s\n", serv->sv_name,
|
2007-02-12 09:53:38 +01:00
|
|
|
__svc_print_addr(sin, buf, sizeof(buf)));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2016-06-24 16:55:48 +02:00
|
|
|
/* Reset the inherited callbacks before calling svc_setup_socket */
|
|
|
|
newsock->sk->sk_state_change = svsk->sk_ostate;
|
|
|
|
newsock->sk->sk_data_ready = svsk->sk_odata;
|
|
|
|
newsock->sk->sk_write_space = svsk->sk_owspace;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* make sure that a write doesn't block forever when
|
|
|
|
* low on memory
|
|
|
|
*/
|
|
|
|
newsock->sk->sk_sndtimeo = HZ*30;
|
|
|
|
|
2012-08-13 23:46:17 +02:00
|
|
|
newsvsk = svc_setup_socket(serv, newsock,
|
|
|
|
(SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY));
|
|
|
|
if (IS_ERR(newsvsk))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto failed;
|
2007-12-31 04:08:12 +01:00
|
|
|
svc_xprt_set_remote(&newsvsk->sk_xprt, sin, slen);
|
2018-02-12 20:00:20 +01:00
|
|
|
err = kernel_getsockname(newsock, sin);
|
|
|
|
slen = err;
|
2007-07-09 22:21:39 +02:00
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
dprintk("svc_tcp_accept: kernel_getsockname error %d\n", -err);
|
|
|
|
slen = offsetof(struct sockaddr, sa_data);
|
|
|
|
}
|
2007-12-31 04:08:12 +01:00
|
|
|
svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen);
|
2007-02-12 09:53:30 +01:00
|
|
|
|
2014-05-12 03:22:47 +02:00
|
|
|
if (sock_is_loopback(newsock->sk))
|
|
|
|
set_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
|
|
|
|
else
|
|
|
|
clear_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
|
2007-12-31 04:07:40 +01:00
|
|
|
if (serv->sv_stats)
|
|
|
|
serv->sv_stats->nettcpconn++;
|
|
|
|
|
|
|
|
return &newsvsk->sk_xprt;
|
|
|
|
|
|
|
|
failed:
|
|
|
|
sock_release(newsock);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2011-02-24 20:25:33 +01:00
|
|
|
static unsigned int svc_tcp_restore_pages(struct svc_sock *svsk, struct svc_rqst *rqstp)
|
|
|
|
{
|
|
|
|
unsigned int i, len, npages;
|
|
|
|
|
2012-12-03 22:45:35 +01:00
|
|
|
if (svsk->sk_datalen == 0)
|
2011-02-24 20:25:33 +01:00
|
|
|
return 0;
|
2012-12-03 22:45:35 +01:00
|
|
|
len = svsk->sk_datalen;
|
2011-02-24 20:25:33 +01:00
|
|
|
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
|
|
if (rqstp->rq_pages[i] != NULL)
|
|
|
|
put_page(rqstp->rq_pages[i]);
|
|
|
|
BUG_ON(svsk->sk_pages[i] == NULL);
|
|
|
|
rqstp->rq_pages[i] = svsk->sk_pages[i];
|
|
|
|
svsk->sk_pages[i] = NULL;
|
|
|
|
}
|
|
|
|
rqstp->rq_arg.head[0].iov_base = page_address(rqstp->rq_pages[0]);
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void svc_tcp_save_pages(struct svc_sock *svsk, struct svc_rqst *rqstp)
|
|
|
|
{
|
|
|
|
unsigned int i, len, npages;
|
|
|
|
|
2012-12-03 22:45:35 +01:00
|
|
|
if (svsk->sk_datalen == 0)
|
2011-02-24 20:25:33 +01:00
|
|
|
return;
|
2012-12-03 22:45:35 +01:00
|
|
|
len = svsk->sk_datalen;
|
2011-02-24 20:25:33 +01:00
|
|
|
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
|
|
svsk->sk_pages[i] = rqstp->rq_pages[i];
|
|
|
|
rqstp->rq_pages[i] = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void svc_tcp_clear_pages(struct svc_sock *svsk)
|
|
|
|
{
|
|
|
|
unsigned int i, len, npages;
|
|
|
|
|
2012-12-03 22:45:35 +01:00
|
|
|
if (svsk->sk_datalen == 0)
|
2011-02-24 20:25:33 +01:00
|
|
|
goto out;
|
2012-12-03 22:45:35 +01:00
|
|
|
len = svsk->sk_datalen;
|
2011-02-24 20:25:33 +01:00
|
|
|
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < npages; i++) {
|
2013-06-26 17:09:06 +02:00
|
|
|
if (svsk->sk_pages[i] == NULL) {
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
continue;
|
|
|
|
}
|
2011-02-24 20:25:33 +01:00
|
|
|
put_page(svsk->sk_pages[i]);
|
|
|
|
svsk->sk_pages[i] = NULL;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
svsk->sk_tcplen = 0;
|
2012-12-03 22:45:35 +01:00
|
|
|
svsk->sk_datalen = 0;
|
2011-02-24 20:25:33 +01:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
2012-12-03 22:30:42 +01:00
|
|
|
* Receive fragment record header.
|
2009-08-20 02:34:19 +02:00
|
|
|
* If we haven't gotten the record length yet, get the next four bytes.
|
2005-04-17 00:20:36 +02:00
|
|
|
*/
|
2009-08-20 02:34:19 +02:00
|
|
|
static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2007-12-31 04:07:50 +01:00
|
|
|
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
|
2009-05-18 23:47:56 +02:00
|
|
|
unsigned int want;
|
2009-08-20 02:34:19 +02:00
|
|
|
int len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-04-14 18:27:30 +02:00
|
|
|
if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
struct kvec iov;
|
|
|
|
|
2009-05-18 23:47:56 +02:00
|
|
|
want = sizeof(rpc_fraghdr) - svsk->sk_tcplen;
|
2005-04-17 00:20:36 +02:00
|
|
|
iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen;
|
|
|
|
iov.iov_len = want;
|
2018-10-01 16:41:53 +02:00
|
|
|
len = svc_recvfrom(rqstp, &iov, 1, want, 0);
|
|
|
|
if (len < 0)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto error;
|
|
|
|
svsk->sk_tcplen += len;
|
|
|
|
|
|
|
|
if (len < want) {
|
2008-04-14 18:27:30 +02:00
|
|
|
dprintk("svc: short recvfrom while reading record "
|
|
|
|
"length (%d of %d)\n", len, want);
|
2011-02-24 20:25:33 +01:00
|
|
|
return -EAGAIN;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2012-12-03 22:11:13 +01:00
|
|
|
dprintk("svc: TCP record, %d bytes\n", svc_sock_reclen(svsk));
|
2012-12-03 21:50:38 +01:00
|
|
|
if (svc_sock_reclen(svsk) + svsk->sk_datalen >
|
|
|
|
serv->sv_max_mesg) {
|
2012-12-11 00:15:07 +01:00
|
|
|
net_notice_ratelimited("RPC: fragment too large: %d\n",
|
|
|
|
svc_sock_reclen(svsk));
|
2005-04-17 00:20:36 +02:00
|
|
|
goto err_delete;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-03 22:11:13 +01:00
|
|
|
return svc_sock_reclen(svsk);
|
2011-02-24 20:25:33 +01:00
|
|
|
error:
|
|
|
|
dprintk("RPC: TCP recv_record got %d\n", len);
|
2009-08-20 02:34:19 +02:00
|
|
|
return len;
|
2011-02-24 20:25:33 +01:00
|
|
|
err_delete:
|
2009-08-20 02:34:19 +02:00
|
|
|
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
|
|
|
|
return -EAGAIN;
|
|
|
|
}
|
|
|
|
|
2009-05-18 23:47:56 +02:00
|
|
|
static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
|
2009-09-10 16:32:28 +02:00
|
|
|
{
|
2009-05-18 23:47:56 +02:00
|
|
|
struct rpc_xprt *bc_xprt = svsk->sk_xprt.xpt_bc_xprt;
|
2009-09-10 16:32:28 +02:00
|
|
|
struct rpc_rqst *req = NULL;
|
2009-05-18 23:47:56 +02:00
|
|
|
struct kvec *src, *dst;
|
|
|
|
__be32 *p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
|
2011-02-14 20:52:03 +01:00
|
|
|
__be32 xid;
|
|
|
|
__be32 calldir;
|
2009-09-10 16:32:28 +02:00
|
|
|
|
|
|
|
xid = *p++;
|
|
|
|
calldir = *p;
|
|
|
|
|
2014-11-13 00:04:04 +01:00
|
|
|
if (!bc_xprt)
|
2009-05-18 23:47:56 +02:00
|
|
|
return -EAGAIN;
|
2018-08-31 16:21:00 +02:00
|
|
|
spin_lock(&bc_xprt->queue_lock);
|
2014-11-13 00:04:04 +01:00
|
|
|
req = xprt_lookup_rqst(bc_xprt, xid);
|
|
|
|
if (!req)
|
|
|
|
goto unlock_notfound;
|
2009-05-18 23:47:56 +02:00
|
|
|
|
|
|
|
memcpy(&req->rq_private_buf, &req->rq_rcv_buf, sizeof(struct xdr_buf));
|
|
|
|
/*
|
|
|
|
* XXX!: cheating for now! Only copying HEAD.
|
|
|
|
* But we know this is good enough for now (in fact, for any
|
|
|
|
* callback reply in the forseeable future).
|
|
|
|
*/
|
|
|
|
dst = &req->rq_private_buf.head[0];
|
|
|
|
src = &rqstp->rq_arg.head[0];
|
|
|
|
if (dst->iov_len < src->iov_len)
|
2014-11-13 00:04:04 +01:00
|
|
|
goto unlock_eagain; /* whatever; just giving up. */
|
2009-05-18 23:47:56 +02:00
|
|
|
memcpy(dst->iov_base, src->iov_base, src->iov_len);
|
2012-12-03 22:11:13 +01:00
|
|
|
xprt_complete_rqst(req->rq_task, rqstp->rq_arg.len);
|
2009-05-18 23:47:56 +02:00
|
|
|
rqstp->rq_arg.len = 0;
|
2018-08-31 16:21:00 +02:00
|
|
|
spin_unlock(&bc_xprt->queue_lock);
|
2009-05-18 23:47:56 +02:00
|
|
|
return 0;
|
2014-11-13 00:04:04 +01:00
|
|
|
unlock_notfound:
|
|
|
|
printk(KERN_NOTICE
|
|
|
|
"%s: Got unrecognized reply: "
|
|
|
|
"calldir 0x%x xpt_bc_xprt %p xid %08x\n",
|
|
|
|
__func__, ntohl(calldir),
|
|
|
|
bc_xprt, ntohl(xid));
|
|
|
|
unlock_eagain:
|
2018-08-31 16:21:00 +02:00
|
|
|
spin_unlock(&bc_xprt->queue_lock);
|
2014-11-13 00:04:04 +01:00
|
|
|
return -EAGAIN;
|
2009-05-18 23:47:56 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static int copy_pages_to_kvecs(struct kvec *vec, struct page **pages, int len)
|
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
int t = 0;
|
|
|
|
|
|
|
|
while (t < len) {
|
|
|
|
vec[i].iov_base = page_address(pages[i]);
|
|
|
|
vec[i].iov_len = PAGE_SIZE;
|
|
|
|
i++;
|
|
|
|
t += PAGE_SIZE;
|
|
|
|
}
|
|
|
|
return i;
|
2009-09-10 16:32:28 +02:00
|
|
|
}
|
|
|
|
|
2012-12-03 21:50:38 +01:00
|
|
|
static void svc_tcp_fragment_received(struct svc_sock *svsk)
|
|
|
|
{
|
|
|
|
/* If we have more data, signal svc_xprt_enqueue() to try again */
|
|
|
|
dprintk("svc: TCP %s record (%d bytes)\n",
|
|
|
|
svc_sock_final_rec(svsk) ? "final" : "nonfinal",
|
|
|
|
svc_sock_reclen(svsk));
|
|
|
|
svsk->sk_tcplen = 0;
|
|
|
|
svsk->sk_reclen = 0;
|
|
|
|
}
|
2011-02-24 20:25:33 +01:00
|
|
|
|
2009-08-20 02:34:19 +02:00
|
|
|
/*
|
|
|
|
* Receive data from a TCP socket.
|
|
|
|
*/
|
|
|
|
static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk =
|
|
|
|
container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
|
|
|
|
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
|
|
|
|
int len;
|
|
|
|
struct kvec *vec;
|
2011-02-24 20:25:33 +01:00
|
|
|
unsigned int want, base;
|
2009-05-18 23:47:56 +02:00
|
|
|
__be32 *p;
|
|
|
|
__be32 calldir;
|
2009-05-18 23:47:56 +02:00
|
|
|
int pnum;
|
2009-08-20 02:34:19 +02:00
|
|
|
|
|
|
|
dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
|
|
|
|
svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags),
|
|
|
|
test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags),
|
|
|
|
test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
|
|
|
|
|
|
|
|
len = svc_tcp_recv_record(svsk, rqstp);
|
|
|
|
if (len < 0)
|
|
|
|
goto error;
|
|
|
|
|
2011-02-24 20:25:33 +01:00
|
|
|
base = svc_tcp_restore_pages(svsk, rqstp);
|
2012-12-03 21:50:38 +01:00
|
|
|
want = svc_sock_reclen(svsk) - (svsk->sk_tcplen - sizeof(rpc_fraghdr));
|
2011-02-24 20:25:33 +01:00
|
|
|
|
2006-10-04 11:15:47 +02:00
|
|
|
vec = rqstp->rq_vec;
|
2009-09-10 16:32:28 +02:00
|
|
|
|
2018-10-01 16:41:53 +02:00
|
|
|
pnum = copy_pages_to_kvecs(&vec[0], &rqstp->rq_pages[0], base + want);
|
2009-05-18 23:47:56 +02:00
|
|
|
|
2006-10-04 11:15:46 +02:00
|
|
|
rqstp->rq_respages = &rqstp->rq_pages[pnum];
|
2012-12-11 00:01:37 +01:00
|
|
|
rqstp->rq_next_page = rqstp->rq_respages + 1;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Now receive data */
|
2018-10-01 16:41:53 +02:00
|
|
|
len = svc_recvfrom(rqstp, vec, pnum, base + want, base);
|
2012-12-03 22:45:35 +01:00
|
|
|
if (len >= 0) {
|
2011-02-24 20:25:33 +01:00
|
|
|
svsk->sk_tcplen += len;
|
2012-12-03 22:45:35 +01:00
|
|
|
svsk->sk_datalen += len;
|
|
|
|
}
|
2012-12-03 21:50:38 +01:00
|
|
|
if (len != want || !svc_sock_final_rec(svsk)) {
|
2012-08-10 00:12:28 +02:00
|
|
|
svc_tcp_save_pages(svsk, rqstp);
|
2011-02-24 20:25:33 +01:00
|
|
|
if (len < 0 && len != -EAGAIN)
|
2012-12-03 22:30:42 +01:00
|
|
|
goto err_delete;
|
2012-12-03 21:50:38 +01:00
|
|
|
if (len == want)
|
|
|
|
svc_tcp_fragment_received(svsk);
|
|
|
|
else
|
2012-12-11 00:15:07 +01:00
|
|
|
dprintk("svc: incomplete TCP record (%d of %d)\n",
|
|
|
|
(int)(svsk->sk_tcplen - sizeof(rpc_fraghdr)),
|
2012-12-03 21:50:38 +01:00
|
|
|
svc_sock_reclen(svsk));
|
2011-02-24 20:25:33 +01:00
|
|
|
goto err_noclose;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2013-06-26 16:55:40 +02:00
|
|
|
if (svsk->sk_datalen < 8) {
|
2013-06-26 17:09:06 +02:00
|
|
|
svsk->sk_datalen = 0;
|
2012-12-03 22:30:42 +01:00
|
|
|
goto err_delete; /* client is nuts. */
|
2013-06-26 17:09:06 +02:00
|
|
|
}
|
2012-12-03 22:30:42 +01:00
|
|
|
|
2012-12-03 21:50:38 +01:00
|
|
|
rqstp->rq_arg.len = svsk->sk_datalen;
|
2005-04-17 00:20:36 +02:00
|
|
|
rqstp->rq_arg.page_base = 0;
|
2009-05-18 23:47:56 +02:00
|
|
|
if (rqstp->rq_arg.len <= rqstp->rq_arg.head[0].iov_len) {
|
|
|
|
rqstp->rq_arg.head[0].iov_len = rqstp->rq_arg.len;
|
2005-04-17 00:20:36 +02:00
|
|
|
rqstp->rq_arg.page_len = 0;
|
2009-05-18 23:47:56 +02:00
|
|
|
} else
|
|
|
|
rqstp->rq_arg.page_len = rqstp->rq_arg.len - rqstp->rq_arg.head[0].iov_len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:07:25 +01:00
|
|
|
rqstp->rq_xprt_ctxt = NULL;
|
2005-04-17 00:20:36 +02:00
|
|
|
rqstp->rq_prot = IPPROTO_TCP;
|
2014-11-19 13:51:15 +01:00
|
|
|
if (test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags))
|
|
|
|
set_bit(RQ_LOCAL, &rqstp->rq_flags);
|
|
|
|
else
|
|
|
|
clear_bit(RQ_LOCAL, &rqstp->rq_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-05-18 23:47:56 +02:00
|
|
|
p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
|
|
|
|
calldir = p[1];
|
2011-04-09 16:03:10 +02:00
|
|
|
if (calldir)
|
2009-05-18 23:47:56 +02:00
|
|
|
len = receive_cb_reply(svsk, rqstp);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* Reset TCP read info */
|
2012-12-03 22:45:35 +01:00
|
|
|
svsk->sk_datalen = 0;
|
2012-12-03 21:50:38 +01:00
|
|
|
svc_tcp_fragment_received(svsk);
|
2009-05-18 23:47:56 +02:00
|
|
|
|
2011-04-09 16:03:10 +02:00
|
|
|
if (len < 0)
|
|
|
|
goto error;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:08:12 +01:00
|
|
|
svc_xprt_copy_addrs(rqstp, &svsk->sk_xprt);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (serv->sv_stats)
|
|
|
|
serv->sv_stats->nettcpcnt++;
|
|
|
|
|
2009-05-18 23:47:56 +02:00
|
|
|
return rqstp->rq_arg.len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-20 02:34:19 +02:00
|
|
|
error:
|
2011-02-24 20:25:33 +01:00
|
|
|
if (len != -EAGAIN)
|
2012-12-03 22:30:42 +01:00
|
|
|
goto err_delete;
|
2011-02-24 20:25:33 +01:00
|
|
|
dprintk("RPC: TCP recvfrom got EAGAIN\n");
|
2012-08-18 03:35:24 +02:00
|
|
|
return 0;
|
2012-12-03 22:30:42 +01:00
|
|
|
err_delete:
|
2011-02-24 20:25:33 +01:00
|
|
|
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
|
|
|
|
svsk->sk_xprt.xpt_server->sv_name, -len);
|
|
|
|
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
|
|
|
|
err_noclose:
|
2012-08-18 03:35:24 +02:00
|
|
|
return 0; /* record not complete */
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Send out data on TCP socket.
|
|
|
|
*/
|
2007-12-31 04:08:27 +01:00
|
|
|
static int svc_tcp_sendto(struct svc_rqst *rqstp)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct xdr_buf *xbufp = &rqstp->rq_res;
|
|
|
|
int sent;
|
2006-09-27 07:29:38 +02:00
|
|
|
__be32 reclen;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Set up the first element of the reply kvec.
|
|
|
|
* Any other kvecs that may be in use have been taken
|
|
|
|
* care of by the server implementation itself.
|
|
|
|
*/
|
|
|
|
reclen = htonl(0x80000000|((xbufp->len ) - 4));
|
|
|
|
memcpy(xbufp->head[0].iov_base, &reclen, 4);
|
|
|
|
|
|
|
|
sent = svc_sendto(rqstp, &rqstp->rq_res);
|
|
|
|
if (sent != xbufp->len) {
|
2007-12-31 04:08:27 +01:00
|
|
|
printk(KERN_NOTICE
|
|
|
|
"rpc-srv/tcp: %s: %s %d when sending %d bytes "
|
|
|
|
"- shutting down socket\n",
|
2007-12-31 04:08:22 +01:00
|
|
|
rqstp->rq_xprt->xpt_server->sv_name,
|
2005-04-17 00:20:36 +02:00
|
|
|
(sent<0)?"got error":"sent only",
|
|
|
|
sent, xbufp->len);
|
2007-12-31 04:08:22 +01:00
|
|
|
set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags);
|
2007-12-31 04:07:57 +01:00
|
|
|
svc_xprt_enqueue(rqstp->rq_xprt);
|
2005-04-17 00:20:36 +02:00
|
|
|
sent = -EAGAIN;
|
|
|
|
}
|
|
|
|
return sent;
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:42 +01:00
|
|
|
static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
|
2010-09-29 14:04:18 +02:00
|
|
|
struct net *net,
|
2007-12-31 04:07:42 +01:00
|
|
|
struct sockaddr *sa, int salen,
|
|
|
|
int flags)
|
|
|
|
{
|
2010-09-29 14:04:18 +02:00
|
|
|
return svc_create_socket(serv, IPPROTO_TCP, net, sa, salen, flags);
|
2007-12-31 04:07:42 +01:00
|
|
|
}
|
|
|
|
|
2017-08-01 17:59:49 +02:00
|
|
|
static const struct svc_xprt_ops svc_tcp_ops = {
|
2007-12-31 04:07:42 +01:00
|
|
|
.xpo_create = svc_tcp_create,
|
2007-12-31 04:07:23 +01:00
|
|
|
.xpo_recvfrom = svc_tcp_recvfrom,
|
|
|
|
.xpo_sendto = svc_tcp_sendto,
|
2007-12-31 04:07:25 +01:00
|
|
|
.xpo_release_rqst = svc_release_skb,
|
2008-12-23 22:30:11 +01:00
|
|
|
.xpo_detach = svc_tcp_sock_detach,
|
2007-12-31 04:07:27 +01:00
|
|
|
.xpo_free = svc_sock_free,
|
2007-12-31 04:07:31 +01:00
|
|
|
.xpo_has_wspace = svc_tcp_has_wspace,
|
2007-12-31 04:07:36 +01:00
|
|
|
.xpo_accept = svc_tcp_accept,
|
2014-05-19 19:40:22 +02:00
|
|
|
.xpo_secure_port = svc_sock_secure_port,
|
2016-11-11 19:16:22 +01:00
|
|
|
.xpo_kill_temp_xprt = svc_tcp_kill_temp_xprt,
|
2007-12-31 04:07:17 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct svc_xprt_class svc_tcp_class = {
|
|
|
|
.xcl_name = "tcp",
|
2007-12-31 04:07:42 +01:00
|
|
|
.xcl_owner = THIS_MODULE,
|
2007-12-31 04:07:17 +01:00
|
|
|
.xcl_ops = &svc_tcp_ops,
|
2007-12-31 04:07:21 +01:00
|
|
|
.xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP,
|
2014-07-16 21:38:32 +02:00
|
|
|
.xcl_ident = XPRT_TRANSPORT_TCP,
|
2007-12-31 04:07:17 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
void svc_init_xprt_sock(void)
|
|
|
|
{
|
|
|
|
svc_reg_xprt_class(&svc_tcp_class);
|
|
|
|
svc_reg_xprt_class(&svc_udp_class);
|
|
|
|
}
|
|
|
|
|
|
|
|
void svc_cleanup_xprt_sock(void)
|
|
|
|
{
|
|
|
|
svc_unreg_xprt_class(&svc_tcp_class);
|
|
|
|
svc_unreg_xprt_class(&svc_udp_class);
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:50 +01:00
|
|
|
static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk = svsk->sk_sk;
|
|
|
|
|
2011-12-06 12:19:10 +01:00
|
|
|
svc_xprt_init(sock_net(svsk->sk_sock->sk), &svc_tcp_class,
|
|
|
|
&svsk->sk_xprt, serv);
|
2007-12-31 04:08:08 +01:00
|
|
|
set_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
|
2017-02-24 19:25:23 +01:00
|
|
|
set_bit(XPT_CONG_CTRL, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (sk->sk_state == TCP_LISTEN) {
|
|
|
|
dprintk("setting up TCP socket for listening\n");
|
2018-03-27 16:51:00 +02:00
|
|
|
strcpy(svsk->sk_xprt.xpt_remotebuf, "listener");
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
sk->sk_data_ready = svc_tcp_listen_data_ready;
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
|
|
|
dprintk("setting up TCP socket for reading\n");
|
|
|
|
sk->sk_state_change = svc_tcp_state_change;
|
2016-06-24 16:55:48 +02:00
|
|
|
sk->sk_data_ready = svc_data_ready;
|
2016-06-24 16:55:51 +02:00
|
|
|
sk->sk_write_space = svc_write_space;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
svsk->sk_reclen = 0;
|
|
|
|
svsk->sk_tcplen = 0;
|
2012-12-03 22:45:35 +01:00
|
|
|
svsk->sk_datalen = 0;
|
2011-02-24 20:25:33 +01:00
|
|
|
memset(&svsk->sk_pages[0], 0, sizeof(svsk->sk_pages));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-04-14 18:27:01 +02:00
|
|
|
tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
|
2016-07-26 15:51:19 +02:00
|
|
|
switch (sk->sk_state) {
|
|
|
|
case TCP_SYN_RECV:
|
|
|
|
case TCP_ESTABLISHED:
|
|
|
|
break;
|
|
|
|
default:
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
|
2016-07-26 15:51:19 +02:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-12-31 04:08:27 +01:00
|
|
|
void svc_sock_update_bufs(struct svc_serv *serv)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* The number of server threads has changed. Update
|
|
|
|
* rcvbuf and sndbuf accordingly on all sockets
|
|
|
|
*/
|
2010-10-05 21:30:19 +02:00
|
|
|
struct svc_sock *svsk;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
spin_lock_bh(&serv->sv_lock);
|
2010-10-05 21:30:19 +02:00
|
|
|
list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list)
|
2007-12-31 04:07:48 +01:00
|
|
|
set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
spin_unlock_bh(&serv->sv_lock);
|
|
|
|
}
|
2008-12-23 22:30:12 +01:00
|
|
|
EXPORT_SYMBOL_GPL(svc_sock_update_bufs);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize socket for RPC use and create svc_sock struct
|
|
|
|
*/
|
2007-02-12 09:53:28 +01:00
|
|
|
static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
|
|
|
|
struct socket *sock,
|
2012-08-13 23:46:17 +02:00
|
|
|
int flags)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct svc_sock *svsk;
|
|
|
|
struct sock *inet;
|
2007-02-12 09:53:28 +01:00
|
|
|
int pmap_register = !(flags & SVC_SOCK_ANONYMOUS);
|
2012-08-13 23:46:17 +02:00
|
|
|
int err = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dprintk("svc: svc_setup_socket %p\n", sock);
|
2012-08-13 23:46:17 +02:00
|
|
|
svsk = kzalloc(sizeof(*svsk), GFP_KERNEL);
|
|
|
|
if (!svsk)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
inet = sock->sk;
|
|
|
|
|
|
|
|
/* Register socket with portmapper */
|
2012-08-13 23:46:17 +02:00
|
|
|
if (pmap_register)
|
|
|
|
err = svc_register(serv, sock_net(sock->sk), inet->sk_family,
|
2012-01-13 11:02:48 +01:00
|
|
|
inet->sk_protocol,
|
2009-10-15 08:30:45 +02:00
|
|
|
ntohs(inet_sk(inet)->inet_sport));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2012-08-13 23:46:17 +02:00
|
|
|
if (err < 0) {
|
2005-04-17 00:20:36 +02:00
|
|
|
kfree(svsk);
|
2012-08-13 23:46:17 +02:00
|
|
|
return ERR_PTR(err);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
svsk->sk_sock = sock;
|
|
|
|
svsk->sk_sk = inet;
|
|
|
|
svsk->sk_ostate = inet->sk_state_change;
|
|
|
|
svsk->sk_odata = inet->sk_data_ready;
|
|
|
|
svsk->sk_owspace = inet->sk_write_space;
|
2017-08-21 13:23:07 +02:00
|
|
|
/*
|
|
|
|
* This barrier is necessary in order to prevent race condition
|
|
|
|
* with svc_data_ready(), svc_listen_data_ready() and others
|
|
|
|
* when calling callbacks above.
|
|
|
|
*/
|
|
|
|
wmb();
|
|
|
|
inet->sk_user_data = svsk;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Initialize the socket */
|
|
|
|
if (sock->type == SOCK_DGRAM)
|
2007-12-31 04:07:50 +01:00
|
|
|
svc_udp_init(svsk, serv);
|
2016-06-24 16:55:51 +02:00
|
|
|
else
|
2007-12-31 04:07:50 +01:00
|
|
|
svc_tcp_init(svsk, serv);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2016-07-26 15:51:20 +02:00
|
|
|
dprintk("svc: svc_setup_socket created %p (inet %p), "
|
|
|
|
"listen %d close %d\n",
|
|
|
|
svsk, svsk->sk_sk,
|
|
|
|
test_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags),
|
|
|
|
test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
return svsk;
|
|
|
|
}
|
|
|
|
|
2014-02-26 14:50:01 +01:00
|
|
|
bool svc_alien_sock(struct net *net, int fd)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
struct socket *sock = sockfd_lookup(fd, &err);
|
|
|
|
bool ret = false;
|
|
|
|
|
|
|
|
if (!sock)
|
|
|
|
goto out;
|
|
|
|
if (sock_net(sock->sk) != net)
|
|
|
|
ret = true;
|
|
|
|
sockfd_put(sock);
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(svc_alien_sock);
|
|
|
|
|
2009-04-24 01:32:33 +02:00
|
|
|
/**
|
|
|
|
* svc_addsock - add a listener socket to an RPC service
|
|
|
|
* @serv: pointer to RPC service to which to add a new listener
|
|
|
|
* @fd: file descriptor of the new listener
|
|
|
|
* @name_return: pointer to buffer to fill in with name of listener
|
|
|
|
* @len: size of the buffer
|
2019-04-09 18:13:37 +02:00
|
|
|
* @cred: credential
|
2009-04-24 01:32:33 +02:00
|
|
|
*
|
|
|
|
* Fills in socket name and returns positive length of name if successful.
|
|
|
|
* Name is terminated with '\n'. On error, returns a negative errno
|
|
|
|
* value.
|
|
|
|
*/
|
|
|
|
int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
|
2019-04-09 18:13:37 +02:00
|
|
|
const size_t len, const struct cred *cred)
|
2006-10-02 11:17:48 +02:00
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
struct socket *so = sockfd_lookup(fd, &err);
|
|
|
|
struct svc_sock *svsk = NULL;
|
2012-08-14 00:01:03 +02:00
|
|
|
struct sockaddr_storage addr;
|
|
|
|
struct sockaddr *sin = (struct sockaddr *)&addr;
|
|
|
|
int salen;
|
2006-10-02 11:17:48 +02:00
|
|
|
|
|
|
|
if (!so)
|
|
|
|
return err;
|
2012-08-14 00:01:03 +02:00
|
|
|
err = -EAFNOSUPPORT;
|
2010-01-26 20:03:56 +01:00
|
|
|
if ((so->sk->sk_family != PF_INET) && (so->sk->sk_family != PF_INET6))
|
2012-08-14 00:01:03 +02:00
|
|
|
goto out;
|
|
|
|
err = -EPROTONOSUPPORT;
|
|
|
|
if (so->sk->sk_protocol != IPPROTO_TCP &&
|
2006-10-02 11:17:48 +02:00
|
|
|
so->sk->sk_protocol != IPPROTO_UDP)
|
2012-08-14 00:01:03 +02:00
|
|
|
goto out;
|
|
|
|
err = -EISCONN;
|
|
|
|
if (so->state > SS_UNCONNECTED)
|
|
|
|
goto out;
|
|
|
|
err = -ENOENT;
|
|
|
|
if (!try_module_get(THIS_MODULE))
|
|
|
|
goto out;
|
|
|
|
svsk = svc_setup_socket(serv, so, SVC_SOCK_DEFAULTS);
|
|
|
|
if (IS_ERR(svsk)) {
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
err = PTR_ERR(svsk);
|
|
|
|
goto out;
|
2006-10-02 11:17:48 +02:00
|
|
|
}
|
2018-02-12 20:00:20 +01:00
|
|
|
salen = kernel_getsockname(svsk->sk_sock, sin);
|
|
|
|
if (salen >= 0)
|
2012-08-14 00:01:03 +02:00
|
|
|
svc_xprt_set_local(&svsk->sk_xprt, sin, salen);
|
2019-04-09 18:13:37 +02:00
|
|
|
svsk->sk_xprt.xpt_cred = get_cred(cred);
|
2012-08-14 21:50:34 +02:00
|
|
|
svc_add_new_perm_xprt(serv, &svsk->sk_xprt);
|
2009-04-24 01:32:48 +02:00
|
|
|
return svc_one_sock_name(svsk, name_return, len);
|
2012-08-14 00:01:03 +02:00
|
|
|
out:
|
|
|
|
sockfd_put(so);
|
|
|
|
return err;
|
2006-10-02 11:17:48 +02:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(svc_addsock);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Create socket for RPC service.
|
|
|
|
*/
|
2007-12-31 04:07:42 +01:00
|
|
|
static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
|
|
|
|
int protocol,
|
2010-09-29 14:04:18 +02:00
|
|
|
struct net *net,
|
2007-12-31 04:07:42 +01:00
|
|
|
struct sockaddr *sin, int len,
|
|
|
|
int flags)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct svc_sock *svsk;
|
|
|
|
struct socket *sock;
|
|
|
|
int error;
|
|
|
|
int type;
|
2007-12-31 04:08:12 +01:00
|
|
|
struct sockaddr_storage addr;
|
|
|
|
struct sockaddr *newsin = (struct sockaddr *)&addr;
|
|
|
|
int newlen;
|
2009-03-31 00:59:17 +02:00
|
|
|
int family;
|
|
|
|
int val;
|
2008-02-21 08:57:45 +01:00
|
|
|
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-02-12 09:53:32 +01:00
|
|
|
dprintk("svc: svc_create_socket(%s, %d, %s)\n",
|
|
|
|
serv->sv_program->pg_name, protocol,
|
2007-02-12 09:53:39 +01:00
|
|
|
__svc_print_addr(sin, buf, sizeof(buf)));
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
|
|
|
|
printk(KERN_WARNING "svc: only UDP and TCP "
|
|
|
|
"sockets supported\n");
|
2007-12-31 04:07:42 +01:00
|
|
|
return ERR_PTR(-EINVAL);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2009-03-31 00:59:17 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
|
2009-03-31 00:59:17 +02:00
|
|
|
switch (sin->sa_family) {
|
|
|
|
case AF_INET6:
|
|
|
|
family = PF_INET6;
|
|
|
|
break;
|
|
|
|
case AF_INET:
|
|
|
|
family = PF_INET;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-09-29 14:06:57 +02:00
|
|
|
error = __sock_create(net, family, type, protocol, &sock, 1);
|
2007-02-12 09:53:39 +01:00
|
|
|
if (error < 0)
|
2007-12-31 04:07:42 +01:00
|
|
|
return ERR_PTR(error);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-12-07 05:35:24 +01:00
|
|
|
svc_reclassify_socket(sock);
|
|
|
|
|
2009-03-31 00:59:17 +02:00
|
|
|
/*
|
|
|
|
* If this is an PF_INET6 listener, we want to avoid
|
|
|
|
* getting requests from IPv4 remotes. Those should
|
|
|
|
* be shunted to a PF_INET listener via rpcbind.
|
|
|
|
*/
|
|
|
|
val = 1;
|
|
|
|
if (family == PF_INET6)
|
|
|
|
kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
|
|
|
|
(char *)&val, sizeof(val));
|
|
|
|
|
2006-09-28 23:37:07 +02:00
|
|
|
if (type == SOCK_STREAM)
|
2012-04-19 05:39:36 +02:00
|
|
|
sock->sk->sk_reuse = SK_CAN_REUSE; /* allow address reuse */
|
2007-02-12 09:53:39 +01:00
|
|
|
error = kernel_bind(sock, sin, len);
|
2006-09-28 23:37:07 +02:00
|
|
|
if (error < 0)
|
|
|
|
goto bummer;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2018-02-12 20:00:20 +01:00
|
|
|
error = kernel_getsockname(sock, newsin);
|
2007-12-31 04:08:12 +01:00
|
|
|
if (error < 0)
|
|
|
|
goto bummer;
|
2018-02-12 20:00:20 +01:00
|
|
|
newlen = error;
|
2007-12-31 04:08:12 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (protocol == IPPROTO_TCP) {
|
2006-08-08 05:58:01 +02:00
|
|
|
if ((error = kernel_listen(sock, 64)) < 0)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto bummer;
|
|
|
|
}
|
|
|
|
|
2012-08-13 23:46:17 +02:00
|
|
|
svsk = svc_setup_socket(serv, sock, flags);
|
2012-08-14 00:01:03 +02:00
|
|
|
if (IS_ERR(svsk)) {
|
|
|
|
error = PTR_ERR(svsk);
|
|
|
|
goto bummer;
|
2007-02-12 09:53:30 +01:00
|
|
|
}
|
2012-08-14 00:01:03 +02:00
|
|
|
svc_xprt_set_local(&svsk->sk_xprt, newsin, newlen);
|
|
|
|
return (struct svc_xprt *)svsk;
|
2005-04-17 00:20:36 +02:00
|
|
|
bummer:
|
|
|
|
dprintk("svc: svc_create_socket error = %d\n", -error);
|
|
|
|
sock_release(sock);
|
2007-12-31 04:07:42 +01:00
|
|
|
return ERR_PTR(error);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2007-12-31 04:07:27 +01:00
|
|
|
/*
|
|
|
|
* Detach the svc_sock from the socket so that no
|
|
|
|
* more callbacks occur.
|
|
|
|
*/
|
|
|
|
static void svc_sock_detach(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
|
|
|
struct sock *sk = svsk->sk_sk;
|
|
|
|
|
|
|
|
dprintk("svc: svc_sock_detach(%p)\n", svsk);
|
|
|
|
|
|
|
|
/* put back the old socket callbacks */
|
2016-06-24 16:55:47 +02:00
|
|
|
lock_sock(sk);
|
2007-12-31 04:07:27 +01:00
|
|
|
sk->sk_state_change = svsk->sk_ostate;
|
|
|
|
sk->sk_data_ready = svsk->sk_odata;
|
|
|
|
sk->sk_write_space = svsk->sk_owspace;
|
2016-06-24 16:55:47 +02:00
|
|
|
sk->sk_user_data = NULL;
|
|
|
|
release_sock(sk);
|
2008-12-23 22:30:11 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Disconnect the socket, and reset the callbacks
|
|
|
|
*/
|
|
|
|
static void svc_tcp_sock_detach(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
|
|
|
|
|
|
|
dprintk("svc: svc_tcp_sock_detach(%p)\n", svsk);
|
|
|
|
|
|
|
|
svc_sock_detach(xprt);
|
|
|
|
|
2011-02-24 20:25:33 +01:00
|
|
|
if (!test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
|
|
|
|
svc_tcp_clear_pages(svsk);
|
2008-12-23 22:30:11 +01:00
|
|
|
kernel_sock_shutdown(svsk->sk_sock, SHUT_RDWR);
|
2011-02-24 20:25:33 +01:00
|
|
|
}
|
2007-12-31 04:07:27 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Free the svc_sock's socket resources and the svc_sock itself.
|
|
|
|
*/
|
|
|
|
static void svc_sock_free(struct svc_xprt *xprt)
|
|
|
|
{
|
|
|
|
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
|
|
|
|
dprintk("svc: svc_sock_free(%p)\n", svsk);
|
|
|
|
|
|
|
|
if (svsk->sk_sock->file)
|
|
|
|
sockfd_put(svsk->sk_sock);
|
|
|
|
else
|
|
|
|
sock_release(svsk->sk_sock);
|
|
|
|
kfree(svsk);
|
|
|
|
}
|