7763814fc9
During a recent testing event, it was reported that the NFSv4.1/4.2 server erroneously bound the back channel to a new TCP connection. RFC5661 specifies that the fore channel is implicitly bound to a new TCP connection when an RPC with Sequence (almost any of them) is done on it. For the back channel to be bound to the new TCP connection, an explicit BindConnectionToSession must be done as the first RPC on the new connection. Since new TCP connections are created by the "reconnect" layer (sys/rpc/clnt_rc.c) of the krpc, this patch adds an optional upcall done by the krpc whenever a new connection is created. The patch also adds the specific upcall function that does a BindConnectionToSession and configures the krpc to call it when required. This is necessary for correct interoperability with NFSv4.1/NFSv4.2 servers when the nfscbd daemon is running. If doing NFSv4.1/NFSv4.2 mounts without this patch, it is recommended that the nfscbd daemon not be running and that the "pnfs" mount option not be specified. PR: 254840 Comments by: asomers MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D29475
90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009 Rick Macklem, University of Guelph
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NFS_NFSCL_H
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#define _NFS_NFSCL_H
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/*
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* Extra stuff for a NFSv4 nfsnode.
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* MALLOC'd to the correct length for the name and file handle.
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* n4_data has the file handle, followed by the file name.
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* The macro NFS4NODENAME() returns a pointer to the start of the
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* name.
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*/
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struct nfsv4node {
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u_int16_t n4_fhlen;
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u_int16_t n4_namelen;
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u_int8_t n4_data[1];
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};
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#define NFS4NODENAME(n) (&((n)->n4_data[(n)->n4_fhlen]))
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/*
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* Just a macro to convert the nfscl_reqstart arguments.
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*/
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#define NFSCL_REQSTART(n, p, v) \
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nfscl_reqstart((n), (p), VFSTONFS((v)->v_mount), \
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VTONFS(v)->n_fhp->nfh_fh, VTONFS(v)->n_fhp->nfh_len, NULL, \
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NULL, 0, 0)
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/*
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* These two macros convert between a lease duration and renew interval.
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* For now, just make the renew interval 1/2 the lease duration.
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* (They should be inverse operators.)
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*/
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#define NFSCL_RENEW(l) (((l) < 2) ? 1 : ((l) / 2))
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#define NFSCL_LEASE(r) ((r) * 2)
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/* This macro checks to see if a forced dismount is about to occur. */
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#define NFSCL_FORCEDISM(m) (((m)->mnt_kern_flag & MNTK_UNMOUNTF) != 0 || \
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(VFSTONFS(m)->nm_privflag & NFSMNTP_FORCEDISM) != 0)
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/*
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* These flag bits are used for the argument to nfscl_fillsattr() to
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* indicate special handling of the attributes.
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*/
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#define NFSSATTR_FULL 0x1
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#define NFSSATTR_SIZE0 0x2
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#define NFSSATTR_SIZENEG1 0x4
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#define NFSSATTR_SIZERDEV 0x8
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/* Use this macro for debug printfs. */
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#define NFSCL_DEBUG(level, ...) do { \
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if (nfscl_debuglevel >= (level)) \
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printf(__VA_ARGS__); \
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} while (0)
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struct nfscl_reconarg {
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int minorvers;
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uint8_t sessionid[NFSX_V4SESSIONID];
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};
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#endif /* _NFS_NFSCL_H */
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