 @@ -1,1347 +1,1347 @@
-/*	$NetBSD: nfs_socket.c,v 1.173.4.8 2011/03/29 19:47:37 riz Exp $	*/
+/*	$NetBSD: nfs_socket.c,v 1.173.4.9 2011/04/24 16:23:49 riz Exp $	*/
 /*
  * Copyright (c) 1989, 1991, 1993, 1995
  *	The Regents of the University of California.  All rights reserved.
+ *
  * This code is derived from software contributed to Berkeley by
  * Rick Macklem at The University of Guelph.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
  *	@(#)nfs_socket.c	8.5 (Berkeley) 3/30/95
  */
 /*
  * Socket operations for use by nfs
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.173.4.8 2011/03/29 19:47:37 riz Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.173.4.9 2011/04/24 16:23:49 riz Exp $");
 #include "fs_nfs.h"
 #include "opt_nfs.h"
 #include "opt_nfsserver.h"
 #include "opt_mbuftrace.h"
 #include "opt_inet.h"
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/evcnt.h>
 #include <sys/callout.h>
 #include <sys/proc.h>
 #include <sys/mount.h>
 #include <sys/kernel.h>
 #include <sys/kmem.h>
 #include <sys/mbuf.h>
 #include <sys/vnode.h>
 #include <sys/domain.h>
 #include <sys/protosw.h>
 #include <sys/socket.h>
 #include <sys/socketvar.h>
 #include <sys/syslog.h>
 #include <sys/tprintf.h>
 #include <sys/namei.h>
 #include <sys/signal.h>
 #include <sys/signalvar.h>
 #include <sys/kauth.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <nfs/rpcv2.h>
 #include <nfs/nfsproto.h>
 #include <nfs/nfs.h>
 #include <nfs/xdr_subs.h>
 #include <nfs/nfsm_subs.h>
 #include <nfs/nfsmount.h>
 #include <nfs/nfsnode.h>
 #include <nfs/nfsrtt.h>
 #include <nfs/nfs_var.h>
 #ifdef MBUFTRACE
 struct mowner nfs_mowner = MOWNER_INIT("nfs","");
 #endif
 /*
  * Estimate rto for an nfs rpc sent via. an unreliable datagram.
  * Use the mean and mean deviation of rtt for the appropriate type of rpc
  * for the frequent rpcs and a default for the others.
  * The justification for doing "other" this way is that these rpcs
  * happen so infrequently that timer est. would probably be stale.
  * Also, since many of these rpcs are
  * non-idempotent, a conservative timeout is desired.
  * getattr, lookup - A+2D
  * read, write     - A+4D
  * other           - nm_timeo
  */
 #define	NFS_RTO(n, t) \
 	((t) == 0 ? (n)->nm_timeo : \
 	 ((t) < 3 ? \
 	  (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \
 	  ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1)))
 #define	NFS_SRTT(r)	(r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1]
 #define	NFS_SDRTT(r)	(r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1]
 /*
  * External data, mostly RPC constants in XDR form
  */
 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers,
 	rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr,
 	rpc_auth_kerb;
 extern u_int32_t nfs_prog;
 extern const int nfsv3_procid[NFS_NPROCS];
 extern int nfs_ticks;
 #ifdef DEBUG
 /*
  * Avoid spamming the console with debugging messages.  We only print
  * the nfs timer and reply error debugs every 10 seconds.
  */
 static const struct timeval nfs_err_interval = { 10, 0 };
 static struct timeval nfs_reply_last_err_time;
 static struct timeval nfs_timer_last_err_time;
 #endif
 /*
  * Defines which timer to use for the procnum.
  * 0 - default
  * 1 - getattr
  * 2 - lookup
  * 3 - read
  * 4 - write
  */
 static const int proct[NFS_NPROCS] = {
 	[NFSPROC_NULL] = 0,
 	[NFSPROC_GETATTR] = 1,
 	[NFSPROC_SETATTR] = 0,
 	[NFSPROC_LOOKUP] = 2,
 	[NFSPROC_ACCESS] = 1,
 	[NFSPROC_READLINK] = 3,
 	[NFSPROC_READ] = 3,
 	[NFSPROC_WRITE] = 4,
 	[NFSPROC_CREATE] = 0,
 	[NFSPROC_MKDIR] = 0,
 	[NFSPROC_SYMLINK] = 0,
 	[NFSPROC_MKNOD] = 0,
 	[NFSPROC_REMOVE] = 0,
 	[NFSPROC_RMDIR] = 0,
 	[NFSPROC_RENAME] = 0,
 	[NFSPROC_LINK] = 0,
 	[NFSPROC_READDIR] = 3,
 	[NFSPROC_READDIRPLUS] = 3,
 	[NFSPROC_FSSTAT] = 0,
 	[NFSPROC_FSINFO] = 0,
 	[NFSPROC_PATHCONF] = 0,
 	[NFSPROC_COMMIT] = 0,
 	[NFSPROC_NOOP] = 0,
 };
 /*
  * There is a congestion window for outstanding rpcs maintained per mount
  * point. The cwnd size is adjusted in roughly the way that:
  * Van Jacobson, Congestion avoidance and Control, In "Proceedings of
  * SIGCOMM '88". ACM, August 1988.
  * describes for TCP. The cwnd size is chopped in half on a retransmit timeout
  * and incremented by 1/cwnd when each rpc reply is received and a full cwnd
  * of rpcs is in progress.
  * (The sent count and cwnd are scaled for integer arith.)
  * Variants of "slow start" were tried and were found to be too much of a
  * performance hit (ave. rtt 3 times larger),
  * I suspect due to the large rtt that nfs rpcs have.
  */
 #define	NFS_CWNDSCALE	256
 #define	NFS_MAXCWND	(NFS_CWNDSCALE * 32)
 static const int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, };
 int nfsrtton = 0;
 struct nfsrtt nfsrtt;
 struct nfsreqhead nfs_reqq;
 static callout_t nfs_timer_ch;
 static struct evcnt nfs_timer_ev;
 static struct evcnt nfs_timer_start_ev;
 static struct evcnt nfs_timer_stop_ev;
 #ifdef NFS
 static int nfs_sndlock(struct nfsmount *, struct nfsreq *);
 static void nfs_sndunlock(struct nfsmount *);
 #endif
 static int nfs_rcvlock(struct nfsmount *, struct nfsreq *);
 static void nfs_rcvunlock(struct nfsmount *);
 #if defined(NFSSERVER)
 static void nfsrv_wakenfsd_locked(struct nfssvc_sock *);
 #endif /* defined(NFSSERVER) */
 /*
  * Initialize sockets and congestion for a new NFS connection.
  * We do not free the sockaddr if error.
  */
 int
 nfs_connect(nmp, rep, l)
 	struct nfsmount *nmp;
 	struct nfsreq *rep;
 	struct lwp *l;
+{
 	struct socket *so;
 	int error, rcvreserve, sndreserve;
 	struct sockaddr *saddr;
 	struct sockaddr_in *sin;
 #ifdef INET6
 	struct sockaddr_in6 *sin6;
 #endif
 	struct mbuf *m;
 	int val;
 	nmp->nm_so = (struct socket *)0;
 	saddr = mtod(nmp->nm_nam, struct sockaddr *);
 	error = socreate(saddr->sa_family, &nmp->nm_so,
 		nmp->nm_sotype, nmp->nm_soproto, l, NULL);
 	if (error)
 		goto bad;
 	so = nmp->nm_so;
 #ifdef MBUFTRACE
 	so->so_mowner = &nfs_mowner;
 	so->so_rcv.sb_mowner = &nfs_mowner;
 	so->so_snd.sb_mowner = &nfs_mowner;
 #endif
 	nmp->nm_soflags = so->so_proto->pr_flags;
 	/*
 	 * Some servers require that the client port be a reserved port number.
 	 */
 	if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) {
 		val = IP_PORTRANGE_LOW;
 		if ((error = so_setsockopt(NULL, so, IPPROTO_IP, IP_PORTRANGE,
 		    &val, sizeof(val))))
 			goto bad;
 		m = m_get(M_WAIT, MT_SONAME);
 		MCLAIM(m, so->so_mowner);
 		sin = mtod(m, struct sockaddr_in *);
 		sin->sin_len = m->m_len = sizeof (struct sockaddr_in);
 		sin->sin_family = AF_INET;
 		sin->sin_addr.s_addr = INADDR_ANY;
 		sin->sin_port = 0;
 		error = sobind(so, m, &lwp0);
 		m_freem(m);
 		if (error)
 			goto bad;
+	}
 #ifdef INET6
 	if (saddr->sa_family == AF_INET6 && (nmp->nm_flag & NFSMNT_RESVPORT)) {
 		val = IPV6_PORTRANGE_LOW;
 		if ((error = so_setsockopt(NULL, so, IPPROTO_IPV6,
 		    IPV6_PORTRANGE, &val, sizeof(val))))
 			goto bad;
 		m = m_get(M_WAIT, MT_SONAME);
 		MCLAIM(m, so->so_mowner);
 		sin6 = mtod(m, struct sockaddr_in6 *);
 		sin6->sin6_len = m->m_len = sizeof (struct sockaddr_in6);
 		sin6->sin6_family = AF_INET6;
 		sin6->sin6_addr = in6addr_any;
 		sin6->sin6_port = 0;
 		error = sobind(so, m, &lwp0);
 		m_freem(m);
 		if (error)
 			goto bad;
+	}
 #endif
 	/*
 	 * Protocols that do not require connections may be optionally left
 	 * unconnected for servers that reply from a port other than NFS_PORT.
 	 */
 	solock(so);
 	if (nmp->nm_flag & NFSMNT_NOCONN) {
 		if (nmp->nm_soflags & PR_CONNREQUIRED) {
 			sounlock(so);
 			error = ENOTCONN;
 			goto bad;
+		}
 	} else {
 		error = soconnect(so, nmp->nm_nam, l);
 		if (error) {
 			sounlock(so);
 			goto bad;
+		}
 		/*
 		 * Wait for the connection to complete. Cribbed from the
 		 * connect system call but with the wait timing out so
 		 * that interruptible mounts don't hang here for a long time.
 		 */
 		while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
 			(void)sowait(so, false, 2 * hz);
 			if ((so->so_state & SS_ISCONNECTING) &&
 			    so->so_error == 0 && rep &&
 			    (error = nfs_sigintr(nmp, rep, rep->r_lwp)) != 0){
 				so->so_state &= ~SS_ISCONNECTING;
 				sounlock(so);
 				goto bad;
+			}
+		}
 		if (so->so_error) {
 			error = so->so_error;
 			so->so_error = 0;
 			sounlock(so);
 			goto bad;
+		}
+	}
 	if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) {
 		so->so_rcv.sb_timeo = (5 * hz);
 		so->so_snd.sb_timeo = (5 * hz);
 	} else {
 		/*
 		 * enable receive timeout to detect server crash and reconnect.
 		 * otherwise, we can be stuck in soreceive forever.
 		 */
 		so->so_rcv.sb_timeo = (5 * hz);
 		so->so_snd.sb_timeo = 0;
+	}
 	if (nmp->nm_sotype == SOCK_DGRAM) {
-		sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2;
+		sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 3;
 		rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
 		    NFS_MAXPKTHDR) * 2;
 	} else if (nmp->nm_sotype == SOCK_SEQPACKET) {
-		sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2;
+		sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 3;
 		rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
-		    NFS_MAXPKTHDR) * 2;
+		    NFS_MAXPKTHDR) * 3;
 	} else {
 		sounlock(so);
 		if (nmp->nm_sotype != SOCK_STREAM)
 			panic("nfscon sotype");
 		if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
 			val = 1;
 			so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val,
 			    sizeof(val));
+		}
 		if (so->so_proto->pr_protocol == IPPROTO_TCP) {
 			val = 1;
 			so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val,
 			    sizeof(val));
+		}
 		sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR +
-		    sizeof (u_int32_t)) * 2;
+		    sizeof (u_int32_t)) * 3;
 		rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR +
-		    sizeof (u_int32_t)) * 2;
+		    sizeof (u_int32_t)) * 3;
 		solock(so);
+	}
 	error = soreserve(so, sndreserve, rcvreserve);
 	if (error) {
 		sounlock(so);
 		goto bad;
+	}
 	so->so_rcv.sb_flags |= SB_NOINTR;
 	so->so_snd.sb_flags |= SB_NOINTR;
 	sounlock(so);
 	/* Initialize other non-zero congestion variables */
 	nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] =
 		NFS_TIMEO << 3;
 	nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] =
 		nmp->nm_sdrtt[3] = 0;
 	nmp->nm_cwnd = NFS_MAXCWND / 2;	    /* Initial send window */
 	nmp->nm_sent = 0;
 	nmp->nm_timeouts = 0;
 	return (0);
 bad:
 	nfs_disconnect(nmp);
 	return (error);
+}
 /*
  * Reconnect routine:
  * Called when a connection is broken on a reliable protocol.
  * - clean up the old socket
  * - nfs_connect() again
  * - set R_MUSTRESEND for all outstanding requests on mount point
  * If this fails the mount point is DEAD!
  * nb: Must be called with the nfs_sndlock() set on the mount point.
  */
 int
 nfs_reconnect(struct nfsreq *rep)
+{
 	struct nfsreq *rp;
 	struct nfsmount *nmp = rep->r_nmp;
 	int error;
 	nfs_disconnect(nmp);
 	while ((error = nfs_connect(nmp, rep, &lwp0)) != 0) {
 		if (error == EINTR || error == ERESTART)
 			return (EINTR);
 		kpause("nfscn2", false, hz, NULL);
+	}
 	/*
 	 * Loop through outstanding request list and fix up all requests
 	 * on old socket.
 	 */
 	TAILQ_FOREACH(rp, &nfs_reqq, r_chain) {
 		if (rp->r_nmp == nmp) {
 			if ((rp->r_flags & R_MUSTRESEND) == 0)
 				rp->r_flags |= R_MUSTRESEND | R_REXMITTED;
 			rp->r_rexmit = 0;
+		}
+	}
 	return (0);
+}
 /*
  * NFS disconnect. Clean up and unlink.
  */
 void
 nfs_disconnect(nmp)
 	struct nfsmount *nmp;
+{
 	struct socket *so;
 	int drain = 0;
 	if (nmp->nm_so) {
 		so = nmp->nm_so;
 		nmp->nm_so = (struct socket *)0;
 		solock(so);
 		soshutdown(so, SHUT_RDWR);
 		sounlock(so);
 		drain = (nmp->nm_iflag & NFSMNT_DISMNT) != 0;
 		if (drain) {
 			/*
 			 * soshutdown() above should wake up the current
 			 * listener.
 			 * Now wake up those waiting for the receive lock, and
 			 * wait for them to go away unhappy, to prevent *nmp
 			 * from evaporating while they're sleeping.
 			 */
 			mutex_enter(&nmp->nm_lock);
 			while (nmp->nm_waiters > 0) {
 				cv_broadcast(&nmp->nm_rcvcv);
 				cv_broadcast(&nmp->nm_sndcv);
 				cv_wait(&nmp->nm_disconcv, &nmp->nm_lock);
+			}
 			mutex_exit(&nmp->nm_lock);
+		}
 		soclose(so);
+	}
 #ifdef DIAGNOSTIC
 	if (drain && (nmp->nm_waiters > 0))
 		panic("nfs_disconnect: waiters left after drain?");
 #endif
+}
 void
 nfs_safedisconnect(nmp)
 	struct nfsmount *nmp;
+{
 	struct nfsreq dummyreq;
 	memset(&dummyreq, 0, sizeof(dummyreq));
 	dummyreq.r_nmp = nmp;
 	nfs_rcvlock(nmp, &dummyreq); /* XXX ignored error return */
 	nfs_disconnect(nmp);
 	nfs_rcvunlock(nmp);
+}
 /*
  * This is the nfs send routine. For connection based socket types, it
  * must be called with an nfs_sndlock() on the socket.
  * "rep == NULL" indicates that it has been called from a server.
  * For the client side:
  * - return EINTR if the RPC is terminated, 0 otherwise
  * - set R_MUSTRESEND if the send fails for any reason
  * - do any cleanup required by recoverable socket errors (? ? ?)
  * For the server side:
  * - return EINTR or ERESTART if interrupted by a signal
  * - return EPIPE if a connection is lost for connection based sockets (TCP...)
  * - do any cleanup required by recoverable socket errors (? ? ?)
  */
 int
 nfs_send(so, nam, top, rep, l)
 	struct socket *so;
 	struct mbuf *nam;
 	struct mbuf *top;
 	struct nfsreq *rep;
 	struct lwp *l;
+{
 	struct mbuf *sendnam;
 	int error, soflags, flags;
 	/* XXX nfs_doio()/nfs_request() calls with  rep->r_lwp == NULL */
 	if (l == NULL && rep->r_lwp == NULL)
 		l = curlwp;
 	if (rep) {
 		if (rep->r_flags & R_SOFTTERM) {
 			m_freem(top);
 			return (EINTR);
+		}
 		if ((so = rep->r_nmp->nm_so) == NULL) {
 			rep->r_flags |= R_MUSTRESEND;
 			m_freem(top);
 			return (0);
+		}
 		rep->r_flags &= ~R_MUSTRESEND;
 		soflags = rep->r_nmp->nm_soflags;
 	} else
 		soflags = so->so_proto->pr_flags;
 	if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED))
 		sendnam = (struct mbuf *)0;
 	else
 		sendnam = nam;
 	if (so->so_type == SOCK_SEQPACKET)
 		flags = MSG_EOR;
 	else
 		flags = 0;
 	error = (*so->so_send)(so, sendnam, NULL, top, NULL, flags,  l);
 	if (error) {
 		if (rep) {
 			if (error == ENOBUFS && so->so_type == SOCK_DGRAM) {
 				/*
 				 * We're too fast for the network/driver,
 				 * and UDP isn't flowcontrolled.
 				 * We need to resend. This is not fatal,
 				 * just try again.
+				 *
 				 * Could be smarter here by doing some sort
 				 * of a backoff, but this is rare.
 				 */
 				rep->r_flags |= R_MUSTRESEND;
 			} else {
 				if (error != EPIPE)
 					log(LOG_INFO,
 					    "nfs send error %d for %s\n",
 					    error,
 					    rep->r_nmp->nm_mountp->
 						    mnt_stat.f_mntfromname);
 				/*
 				 * Deal with errors for the client side.
 				 */
 				if (rep->r_flags & R_SOFTTERM)
 					error = EINTR;
 				else if (error != EMSGSIZE)
 					rep->r_flags |= R_MUSTRESEND;
+			}
 		} else {
 			/*
 			 * See above. This error can happen under normal
 			 * circumstances and the log is too noisy.
 			 * The error will still show up in nfsstat.
 			 */
 			if (error != ENOBUFS || so->so_type != SOCK_DGRAM)
 				log(LOG_INFO, "nfsd send error %d\n", error);
+		}
 		/*
 		 * Handle any recoverable (soft) socket errors here. (? ? ?)
 		 */
 		if (error != EINTR && error != ERESTART &&
 		    error != EWOULDBLOCK && error != EPIPE &&
 		    error != EMSGSIZE)
 			error = 0;
+	}
 	return (error);
+}
 #ifdef NFS
 /*
  * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all
  * done by soreceive(), but for SOCK_STREAM we must deal with the Record
  * Mark and consolidate the data into a new mbuf list.
  * nb: Sometimes TCP passes the data up to soreceive() in long lists of
  *     small mbufs.
  * For SOCK_STREAM we must be very careful to read an entire record once
  * we have read any of it, even if the system call has been interrupted.
  */
 static int
 nfs_receive(struct nfsreq *rep, struct mbuf **aname, struct mbuf **mp,
     struct lwp *l)
+{
 	struct socket *so;
 	struct uio auio;
 	struct iovec aio;
 	struct mbuf *m;
 	struct mbuf *control;
 	u_int32_t len;
 	struct mbuf **getnam;
 	int error, sotype, rcvflg;
 	/*
 	 * Set up arguments for soreceive()
 	 */
 	*mp = (struct mbuf *)0;
 	*aname = (struct mbuf *)0;
 	sotype = rep->r_nmp->nm_sotype;
 	/*
 	 * For reliable protocols, lock against other senders/receivers
 	 * in case a reconnect is necessary.
 	 * For SOCK_STREAM, first get the Record Mark to find out how much
 	 * more there is to get.
 	 * We must lock the socket against other receivers
 	 * until we have an entire rpc request/reply.
 	 */
 	if (sotype != SOCK_DGRAM) {
 		error = nfs_sndlock(rep->r_nmp, rep);
 		if (error)
 			return (error);
 tryagain:
 		/*
 		 * Check for fatal errors and resending request.
 		 */
 		/*
 		 * Ugh: If a reconnect attempt just happened, nm_so
 		 * would have changed. NULL indicates a failed
 		 * attempt that has essentially shut down this
 		 * mount point.
 		 */
 		if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) {
 			nfs_sndunlock(rep->r_nmp);
 			return (EINTR);
+		}
 		so = rep->r_nmp->nm_so;
 		if (!so) {
 			error = nfs_reconnect(rep);
 			if (error) {
 				nfs_sndunlock(rep->r_nmp);
 				return (error);
+			}
 			goto tryagain;
+		}
 		while (rep->r_flags & R_MUSTRESEND) {
 			m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT);
 			nfsstats.rpcretries++;
 			rep->r_rtt = 0;
 			rep->r_flags &= ~R_TIMING;
 			error = nfs_send(so, rep->r_nmp->nm_nam, m, rep, l);
 			if (error) {
 				if (error == EINTR || error == ERESTART ||
 				    (error = nfs_reconnect(rep)) != 0) {
 					nfs_sndunlock(rep->r_nmp);
 					return (error);
+				}
 				goto tryagain;
+			}
+		}
 		nfs_sndunlock(rep->r_nmp);
 		if (sotype == SOCK_STREAM) {
 			aio.iov_base = (void *) &len;
 			aio.iov_len = sizeof(u_int32_t);
 			auio.uio_iov = &aio;
 			auio.uio_iovcnt = 1;
 			auio.uio_rw = UIO_READ;
 			auio.uio_offset = 0;
 			auio.uio_resid = sizeof(u_int32_t);
 			UIO_SETUP_SYSSPACE(&auio);
 			do {
 			   rcvflg = MSG_WAITALL;
 			   error = (*so->so_receive)(so, (struct mbuf **)0, &auio,
 				(struct mbuf **)0, (struct mbuf **)0, &rcvflg);
 			   if (error == EWOULDBLOCK && rep) {
 				if (rep->r_flags & R_SOFTTERM)
 					return (EINTR);
 				/*
 				 * if it seems that the server died after it
 				 * received our request, set EPIPE so that
 				 * we'll reconnect and retransmit requests.
 				 */
 				if (rep->r_rexmit >= rep->r_nmp->nm_retry) {
 					nfsstats.rpctimeouts++;
 					error = EPIPE;
+				}
+			   }
 			} while (error == EWOULDBLOCK);
 			if (!error && auio.uio_resid > 0) {
 			    /*
 			     * Don't log a 0 byte receive; it means
 			     * that the socket has been closed, and
 			     * can happen during normal operation
 			     * (forcible unmount or Solaris server).
 			     */
 			    if (auio.uio_resid != sizeof (u_int32_t))
 			      log(LOG_INFO,
 				 "short receive (%lu/%lu) from nfs server %s\n",
 				 (u_long)sizeof(u_int32_t) - auio.uio_resid,
 				 (u_long)sizeof(u_int32_t),
 				 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
 			    error = EPIPE;
+			}
 			if (error)
 				goto errout;
 			len = ntohl(len) & ~0x80000000;
 			/*
 			 * This is SERIOUS! We are out of sync with the sender
 			 * and forcing a disconnect/reconnect is all I can do.
 			 */
 			if (len > NFS_MAXPACKET) {
 			    log(LOG_ERR, "%s (%d) from nfs server %s\n",
 				"impossible packet length",
 				len,
 				rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
 			    error = EFBIG;
 			    goto errout;
+			}
 			auio.uio_resid = len;
 			do {
 			    rcvflg = MSG_WAITALL;
 			    error =  (*so->so_receive)(so, (struct mbuf **)0,
 				&auio, mp, (struct mbuf **)0, &rcvflg);
 			} while (error == EWOULDBLOCK || error == EINTR ||
 				 error == ERESTART);
 			if (!error && auio.uio_resid > 0) {
 			    if (len != auio.uio_resid)
 			      log(LOG_INFO,
 				"short receive (%lu/%d) from nfs server %s\n",
 				(u_long)len - auio.uio_resid, len,
 				rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
 			    error = EPIPE;
+			}
 		} else {
 			/*
 			 * NB: Since uio_resid is big, MSG_WAITALL is ignored
 			 * and soreceive() will return when it has either a
 			 * control msg or a data msg.
 			 * We have no use for control msg., but must grab them
 			 * and then throw them away so we know what is going
 			 * on.
 			 */
 			auio.uio_resid = len = 100000000; /* Anything Big */
 			/* not need to setup uio_vmspace */
 			do {
 			    rcvflg = 0;
 			    error =  (*so->so_receive)(so, (struct mbuf **)0,
 				&auio, mp, &control, &rcvflg);
 			    if (control)
 				m_freem(control);
 			    if (error == EWOULDBLOCK && rep) {
 				if (rep->r_flags & R_SOFTTERM)
 					return (EINTR);
+			    }
 			} while (error == EWOULDBLOCK ||
 				 (!error && *mp == NULL && control));
 			if ((rcvflg & MSG_EOR) == 0)
 				printf("Egad!!\n");
 			if (!error && *mp == NULL)
 				error = EPIPE;
 			len -= auio.uio_resid;
+		}
 errout:
 		if (error && error != EINTR && error != ERESTART) {
 			m_freem(*mp);
 			*mp = (struct mbuf *)0;
 			if (error != EPIPE)
 				log(LOG_INFO,
 				    "receive error %d from nfs server %s\n",
 				    error,
 				 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
 			error = nfs_sndlock(rep->r_nmp, rep);
 			if (!error)
 				error = nfs_reconnect(rep);
 			if (!error)
 				goto tryagain;
 			else
 				nfs_sndunlock(rep->r_nmp);
+		}
 	} else {
 		if ((so = rep->r_nmp->nm_so) == NULL)
 			return (EACCES);
 		if (so->so_state & SS_ISCONNECTED)
 			getnam = (struct mbuf **)0;
 		else
 			getnam = aname;
 		auio.uio_resid = len = 1000000;
 		/* not need to setup uio_vmspace */
 		do {
 			rcvflg = 0;
 			error =  (*so->so_receive)(so, getnam, &auio, mp,
 				(struct mbuf **)0, &rcvflg);
 			if (error == EWOULDBLOCK &&
 			    (rep->r_flags & R_SOFTTERM))
 				return (EINTR);
 		} while (error == EWOULDBLOCK);
 		len -= auio.uio_resid;
 		if (!error && *mp == NULL)
 			error = EPIPE;
+	}
 	if (error) {
 		m_freem(*mp);
 		*mp = (struct mbuf *)0;
+	}
 	return (error);
+}
 /*
  * Implement receipt of reply on a socket.
  * We must search through the list of received datagrams matching them
  * with outstanding requests using the xid, until ours is found.
  */
 /* ARGSUSED */
 static int
 nfs_reply(struct nfsreq *myrep, struct lwp *lwp)
+{
 	struct nfsreq *rep;
 	struct nfsmount *nmp = myrep->r_nmp;
 	int32_t t1;
 	struct mbuf *mrep, *nam, *md;
 	u_int32_t rxid, *tl;
 	char *dpos, *cp2;
 	int error;
 	/*
 	 * Loop around until we get our own reply
 	 */
 	for (;;) {
 		/*
 		 * Lock against other receivers so that I don't get stuck in
 		 * sbwait() after someone else has received my reply for me.
 		 * Also necessary for connection based protocols to avoid
 		 * race conditions during a reconnect.
 		 */
 		error = nfs_rcvlock(nmp, myrep);
 		if (error == EALREADY)
 			return (0);
 		if (error)
 			return (error);
 		/*
 		 * Get the next Rpc reply off the socket
 		 */
 		mutex_enter(&nmp->nm_lock);
 		nmp->nm_waiters++;
 		mutex_exit(&nmp->nm_lock);
 		error = nfs_receive(myrep, &nam, &mrep, lwp);
 		mutex_enter(&nmp->nm_lock);
 		nmp->nm_waiters--;
 		cv_signal(&nmp->nm_disconcv);
 		mutex_exit(&nmp->nm_lock);
 		if (error) {
 			nfs_rcvunlock(nmp);
 			if (nmp->nm_iflag & NFSMNT_DISMNT) {
 				/*
 				 * Oops, we're going away now..
 				 */
 				return error;
+			}
 			/*
 			 * Ignore routing errors on connectionless protocols? ?
 			 */
 			if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) {
 				nmp->nm_so->so_error = 0;
 #ifdef DEBUG
 				if (ratecheck(&nfs_reply_last_err_time,
 				    &nfs_err_interval))
 					printf("%s: ignoring error %d\n",
 					       __func__, error);
 #endif
 				continue;
+			}
 			return (error);
+		}
 		if (nam)
 			m_freem(nam);
 		/*
 		 * Get the xid and check that it is an rpc reply
 		 */
 		md = mrep;
 		dpos = mtod(md, void *);
 		nfsm_dissect(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 		rxid = *tl++;
 		if (*tl != rpc_reply) {
 			nfsstats.rpcinvalid++;
 			m_freem(mrep);
 nfsmout:
 			nfs_rcvunlock(nmp);
 			continue;
+		}
 		/*
 		 * Loop through the request list to match up the reply
 		 * Iff no match, just drop the datagram
 		 */
 		TAILQ_FOREACH(rep, &nfs_reqq, r_chain) {
 			if (rep->r_mrep == NULL && rxid == rep->r_xid) {
 				/* Found it.. */
 				rep->r_mrep = mrep;
 				rep->r_md = md;
 				rep->r_dpos = dpos;
 				if (nfsrtton) {
 					struct rttl *rt;
 					rt = &nfsrtt.rttl[nfsrtt.pos];
 					rt->proc = rep->r_procnum;
 					rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]);
 					rt->sent = nmp->nm_sent;
 					rt->cwnd = nmp->nm_cwnd;
 					rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1];
 					rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1];
 					rt->fsid = nmp->nm_mountp->mnt_stat.f_fsidx;
 					getmicrotime(&rt->tstamp);
 					if (rep->r_flags & R_TIMING)
 						rt->rtt = rep->r_rtt;
 					else
 						rt->rtt = 1000000;
 					nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ;
+				}
 				/*
 				 * Update congestion window.
 				 * Do the additive increase of
 				 * one rpc/rtt.
 				 */
 				if (nmp->nm_cwnd <= nmp->nm_sent) {
 					nmp->nm_cwnd +=
 					   (NFS_CWNDSCALE * NFS_CWNDSCALE +
 					   (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd;
 					if (nmp->nm_cwnd > NFS_MAXCWND)
 						nmp->nm_cwnd = NFS_MAXCWND;
+				}
 				rep->r_flags &= ~R_SENT;
 				nmp->nm_sent -= NFS_CWNDSCALE;
 				/*
 				 * Update rtt using a gain of 0.125 on the mean
 				 * and a gain of 0.25 on the deviation.
 				 */
 				if (rep->r_flags & R_TIMING) {
 					/*
 					 * Since the timer resolution of
 					 * NFS_HZ is so course, it can often
 					 * result in r_rtt == 0. Since
 					 * r_rtt == N means that the actual
 					 * rtt is between N+dt and N+2-dt ticks,
 					 * add 1.
 					 */
 					t1 = rep->r_rtt + 1;
 					t1 -= (NFS_SRTT(rep) >> 3);
 					NFS_SRTT(rep) += t1;
 					if (t1 < 0)
 						t1 = -t1;
 					t1 -= (NFS_SDRTT(rep) >> 2);
 					NFS_SDRTT(rep) += t1;
+				}
 				nmp->nm_timeouts = 0;
 				break;
+			}
+		}
 		nfs_rcvunlock(nmp);
 		/*
 		 * If not matched to a request, drop it.
 		 * If it's mine, get out.
 		 */
 		if (rep == 0) {
 			nfsstats.rpcunexpected++;
 			m_freem(mrep);
 		} else if (rep == myrep) {
 			if (rep->r_mrep == NULL)
 				panic("nfsreply nil");
 			return (0);
+		}
+	}
+}
 /*
  * nfs_request - goes something like this
  *	- fill in request struct
  *	- links it into list
  *	- calls nfs_send() for first transmit
  *	- calls nfs_receive() to get reply
  *	- break down rpc header and return with nfs reply pointed to
  *	  by mrep or error
  * nb: always frees up mreq mbuf list
  */
 int
 nfs_request(np, mrest, procnum, lwp, cred, mrp, mdp, dposp, rexmitp)
 	struct nfsnode *np;
 	struct mbuf *mrest;
 	int procnum;
 	struct lwp *lwp;
 	kauth_cred_t cred;
 	struct mbuf **mrp;
 	struct mbuf **mdp;
 	char **dposp;
 	int *rexmitp;
+{
 	struct mbuf *m, *mrep;
 	struct nfsreq *rep;
 	u_int32_t *tl;
 	int i;
 	struct nfsmount *nmp = VFSTONFS(np->n_vnode->v_mount);
 	struct mbuf *md, *mheadend;
 	char nickv[RPCX_NICKVERF];
 	time_t waituntil;
 	char *dpos, *cp2;
 	int t1, s, error = 0, mrest_len, auth_len, auth_type;
 	int trylater_delay = NFS_TRYLATERDEL, failed_auth = 0;
 	int verf_len, verf_type;
 	u_int32_t xid;
 	char *auth_str, *verf_str;
 	NFSKERBKEY_T key;		/* save session key */
 	kauth_cred_t acred;
 	struct mbuf *mrest_backup = NULL;
 	kauth_cred_t origcred = NULL; /* XXX: gcc */
 	bool retry_cred = true;
 	bool use_opencred = (np->n_flag & NUSEOPENCRED) != 0;
 	if (rexmitp != NULL)
 		*rexmitp = 0;
 	acred = kauth_cred_alloc();
 tryagain_cred:
 	KASSERT(cred != NULL);
 	rep = kmem_alloc(sizeof(*rep), KM_SLEEP);
 	rep->r_nmp = nmp;
 	KASSERT(lwp == NULL || lwp == curlwp);
 	rep->r_lwp = lwp;
 	rep->r_procnum = procnum;
 	i = 0;
 	m = mrest;
 	while (m) {
 		i += m->m_len;
 		m = m->m_next;
+	}
 	mrest_len = i;
 	/*
 	 * Get the RPC header with authorization.
 	 */
 kerbauth:
 	verf_str = auth_str = (char *)0;
 	if (nmp->nm_flag & NFSMNT_KERB) {
 		verf_str = nickv;
 		verf_len = sizeof (nickv);
 		auth_type = RPCAUTH_KERB4;
 		memset((void *)key, 0, sizeof (key));
 		if (failed_auth || nfs_getnickauth(nmp, cred, &auth_str,
 			&auth_len, verf_str, verf_len)) {
 			error = nfs_getauth(nmp, rep, cred, &auth_str,
 				&auth_len, verf_str, &verf_len, key);
 			if (error) {
 				kmem_free(rep, sizeof(*rep));
 				m_freem(mrest);
 				KASSERT(kauth_cred_getrefcnt(acred) == 1);
 				kauth_cred_free(acred);
 				return (error);
+			}
+		}
 		retry_cred = false;
 	} else {
 		/* AUTH_UNIX */
 		uid_t uid;
 		gid_t gid;
 		/*
 		 * on the most unix filesystems, permission checks are
 		 * done when the file is open(2)'ed.
 		 * ie. once a file is successfully open'ed,
 		 * following i/o operations never fail with EACCES.
 		 * we try to follow the semantics as far as possible.
+		 *
 		 * note that we expect that the nfs server always grant
 		 * accesses by the file's owner.
 		 */
 		origcred = cred;
 		switch (procnum) {
 		case NFSPROC_READ:
 		case NFSPROC_WRITE:
 		case NFSPROC_COMMIT:
 			uid = np->n_vattr->va_uid;
 			gid = np->n_vattr->va_gid;
 			if (kauth_cred_geteuid(cred) == uid &&
 			    kauth_cred_getegid(cred) == gid) {
 				retry_cred = false;
 				break;
+			}
 			if (use_opencred)
 				break;
 			kauth_cred_setuid(acred, uid);
 			kauth_cred_seteuid(acred, uid);
 			kauth_cred_setsvuid(acred, uid);
 			kauth_cred_setgid(acred, gid);
 			kauth_cred_setegid(acred, gid);
 			kauth_cred_setsvgid(acred, gid);
 			cred = acred;
 			break;
 		default:
 			retry_cred = false;
 			break;
+		}
 		/*
 		 * backup mbuf chain if we can need it later to retry.
+		 *
 		 * XXX maybe we can keep a direct reference to
 		 * mrest without doing m_copym, but it's ...ugly.
 		 */
 		if (retry_cred)
 			mrest_backup = m_copym(mrest, 0, M_COPYALL, M_WAIT);
 		auth_type = RPCAUTH_UNIX;
 		/* XXX elad - ngroups */
 		auth_len = (((kauth_cred_ngroups(cred) > nmp->nm_numgrps) ?
 			nmp->nm_numgrps : kauth_cred_ngroups(cred)) << 2) +
 * NFSX_UNSIGNED;
+	}
 	m = nfsm_rpchead(cred, nmp->nm_flag, procnum, auth_type, auth_len,
 	     auth_str, verf_len, verf_str, mrest, mrest_len, &mheadend, &xid);
 	if (auth_str)
 		free(auth_str, M_TEMP);
 	/*
 	 * For stream protocols, insert a Sun RPC Record Mark.
 	 */
 	if (nmp->nm_sotype == SOCK_STREAM) {
 		M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
 		*mtod(m, u_int32_t *) = htonl(0x80000000 |
 			 (m->m_pkthdr.len - NFSX_UNSIGNED));
+	}
 	rep->r_mreq = m;
 	rep->r_xid = xid;
 tryagain:
 	if (nmp->nm_flag & NFSMNT_SOFT)
 		rep->r_retry = nmp->nm_retry;
 	else
 		rep->r_retry = NFS_MAXREXMIT + 1;	/* past clip limit */
 	rep->r_rtt = rep->r_rexmit = 0;
 	if (proct[procnum] > 0)
 		rep->r_flags = R_TIMING;
 	else
 		rep->r_flags = 0;
 	rep->r_mrep = NULL;
 	/*
 	 * Do the client side RPC.
 	 */
 	nfsstats.rpcrequests++;
 	/*
 	 * Chain request into list of outstanding requests. Be sure
 	 * to put it LAST so timer finds oldest requests first.
 	 */
 	s = splsoftnet();
 	TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain);
 	nfs_timer_start();
 	/*
 	 * If backing off another request or avoiding congestion, don't
 	 * send this one now but let timer do it. If not timing a request,
 	 * do it now.
 	 */
 	if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM ||
 	    (nmp->nm_flag & NFSMNT_DUMBTIMR) || nmp->nm_sent < nmp->nm_cwnd)) {
 		splx(s);
 		if (nmp->nm_soflags & PR_CONNREQUIRED)
 			error = nfs_sndlock(nmp, rep);
 		if (!error) {
 			m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT);
 			error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep, lwp);
 			if (nmp->nm_soflags & PR_CONNREQUIRED)
 				nfs_sndunlock(nmp);
+		}
 		s = splsoftnet();
 		if (!error && (rep->r_flags & R_MUSTRESEND) == 0) {
 			if ((rep->r_flags & R_SENT) == 0) {
 				nmp->nm_sent += NFS_CWNDSCALE;
 				rep->r_flags |= R_SENT;
+			}
+		}
 		splx(s);
 	} else {
 		splx(s);
 		rep->r_rtt = -1;
+	}
 	/*
 	 * Wait for the reply from our send or the timer's.
 	 */
 	if (!error || error == EPIPE || error == EWOULDBLOCK)
 		error = nfs_reply(rep, lwp);
 	/*
 	 * RPC done, unlink the request.
 	 */
 	s = splsoftnet();
 	TAILQ_REMOVE(&nfs_reqq, rep, r_chain);
 	/*
 	 * Decrement the outstanding request count.
 	 */
 	if (rep->r_flags & R_SENT) {
 		rep->r_flags &= ~R_SENT;	/* paranoia */
 		nmp->nm_sent -= NFS_CWNDSCALE;
+	}
 	splx(s);
 	if (rexmitp != NULL) {
 		int rexmit;
 		if (nmp->nm_sotype != SOCK_DGRAM)
 			rexmit = (rep->r_flags & R_REXMITTED) != 0;
 		else
 			rexmit = rep->r_rexmit;
 		*rexmitp = rexmit;
+	}
 	/*
 	 * If there was a successful reply and a tprintf msg.
 	 * tprintf a response.
 	 */
 	if (!error && (rep->r_flags & R_TPRINTFMSG))
 		nfs_msg(rep->r_lwp, nmp->nm_mountp->mnt_stat.f_mntfromname,
 		    "is alive again");
 	mrep = rep->r_mrep;
 	md = rep->r_md;
 	dpos = rep->r_dpos;
 	if (error)
 		goto nfsmout;
 	/*
 	 * break down the rpc header and check if ok
 	 */
 	nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 	if (*tl++ == rpc_msgdenied) {
 		if (*tl == rpc_mismatch)
 			error = EOPNOTSUPP;
 		else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) {
 			if (!failed_auth) {
 				failed_auth++;
 				mheadend->m_next = (struct mbuf *)0;
 				m_freem(mrep);
 				m_freem(rep->r_mreq);
 				goto kerbauth;
 			} else
 				error = EAUTH;
 		} else
 			error = EACCES;
 		m_freem(mrep);
 		goto nfsmout;
+	}
 	/*
 	 * Grab any Kerberos verifier, otherwise just throw it away.
 	 */
 	verf_type = fxdr_unsigned(int, *tl++);
 	i = fxdr_unsigned(int32_t, *tl);
 	if ((nmp->nm_flag & NFSMNT_KERB) && verf_type == RPCAUTH_KERB4) {
 		error = nfs_savenickauth(nmp, cred, i, key, &md, &dpos, mrep);
 		if (error)
 			goto nfsmout;
 	} else if (i > 0)
 		nfsm_adv(nfsm_rndup(i));
 	nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
 	/* 0 == ok */
 	if (*tl == 0) {
 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
 		if (*tl != 0) {
 			error = fxdr_unsigned(int, *tl);
 			switch (error) {
 			case NFSERR_PERM:
 				error = EPERM;
 				break;
 			case NFSERR_NOENT:
 				error = ENOENT;
 				break;
 			case NFSERR_IO:
 				error = EIO;
 				break;
 			case NFSERR_NXIO:
 				error = ENXIO;
 				break;
 			case NFSERR_ACCES:
 				error = EACCES;
 				if (!retry_cred)
 					break;
 				m_freem(mrep);
 				m_freem(rep->r_mreq);
 				kmem_free(rep, sizeof(*rep));
 				use_opencred = !use_opencred;
 				if (mrest_backup == NULL) {
 					/* m_copym failure */
 					KASSERT(
 					    kauth_cred_getrefcnt(acred) == 1);
 					kauth_cred_free(acred);
 					return ENOMEM;
+				}
 				mrest = mrest_backup;
 				mrest_backup = NULL;
 				cred = origcred;
 				error = 0;
 				retry_cred = false;
 				goto tryagain_cred;
 			case NFSERR_EXIST:
 				error = EEXIST;
 				break;
 			case NFSERR_XDEV:
 				error = EXDEV;
 				break;
 			case NFSERR_NODEV:
 				error = ENODEV;
 				break;
 			case NFSERR_NOTDIR:
 				error = ENOTDIR;
 				break;
 			case NFSERR_ISDIR:
 				error = EISDIR;
 				break;
 			case NFSERR_INVAL:
 				error = EINVAL;
 				break;
 			case NFSERR_FBIG:
 				error = EFBIG;
 				break;
 			case NFSERR_NOSPC:
 				error = ENOSPC;
 				break;
 			case NFSERR_ROFS:
 				error = EROFS;
 				break;
 			case NFSERR_MLINK:
 				error = EMLINK;
 				break;
 			case NFSERR_TIMEDOUT:
 				error = ETIMEDOUT;
 				break;
 			case NFSERR_NAMETOL:
 				error = ENAMETOOLONG;
 				break;
 			case NFSERR_NOTEMPTY:
 				error = ENOTEMPTY;
 				break;