a9148abd9d
and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
453 lines
14 KiB
C
453 lines
14 KiB
C
/*-
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* Copyright (c) 1989, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)nfs.h 8.4 (Berkeley) 5/1/95
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* $FreeBSD$
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*/
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#ifndef _NFSSERVER_NFS_H_
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#define _NFSSERVER_NFS_H_
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#ifdef _KERNEL
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#include "opt_nfs.h"
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#endif
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/*
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* Tunable constants for nfs
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*/
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#define NFS_TICKINTVL 10 /* Desired time for a tick (msec) */
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#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
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#define NFS_TIMEO (1 * NFS_HZ) /* Default timeout = 1 second */
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#define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
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#define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
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#define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
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#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
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#ifndef NFS_GATHERDELAY
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#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
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#endif
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#ifdef _KERNEL
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#define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */
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#endif
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/*
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* Oddballs
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*/
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#define NFS_SRVMAXDATA(n) \
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(((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
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NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
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/*
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* XXX
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* The B_INVAFTERWRITE flag should be set to whatever is required by the
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* buffer cache code to say "Invalidate the block after it is written back".
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*/
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#define B_INVAFTERWRITE B_NOCACHE
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/*
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* The IO_METASYNC flag should be implemented for local filesystems.
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* (Until then, it is nothin at all.)
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*/
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#ifndef IO_METASYNC
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#define IO_METASYNC 0
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#endif
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/* NFS state flags XXX -Wunused */
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#define NFSRV_SNDLOCK 0x01000000 /* Send socket lock */
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#define NFSRV_WANTSND 0x02000000 /* Want above */
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/*
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* Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs
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* should ever try and use it.
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*/
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/*
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* Add a socket to monitor for NFS requests.
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*/
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struct nfsd_addsock_args {
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int sock; /* Socket to serve */
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caddr_t name; /* Client addr for connection based sockets */
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int namelen; /* Length of name */
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};
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/*
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* Start processing requests.
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*/
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struct nfsd_nfsd_args {
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const char *principal; /* GSS-API service principal name */
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int minthreads; /* minimum service thread count */
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int maxthreads; /* maximum service thread count */
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};
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/*
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* XXX to allow amd to include nfs.h without nfsproto.h
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*/
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#ifdef NFS_NPROCS
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#include <nfsserver/nfsrvstats.h>
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#endif
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/*
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* Flags for nfssvc() system call.
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*/
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#define NFSSVC_OLDNFSD 0x004
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#define NFSSVC_ADDSOCK 0x008
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#define NFSSVC_NFSD 0x010
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/*
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* vfs.nfsrv sysctl(3) identifiers
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*/
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#define NFS_NFSRVSTATS 1 /* struct: struct nfsrvstats */
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#define NFS_NFSPRIVPORT 2 /* int: prohibit nfs to resvports */
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#ifdef _KERNEL
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extern struct mtx nfsd_mtx;
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#define NFSD_LOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_OWNED)
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#define NFSD_UNLOCK_ASSERT() mtx_assert(&nfsd_mtx, MA_NOTOWNED)
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#define NFSD_LOCK_DONTCARE()
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#define NFSD_LOCK() mtx_lock(&nfsd_mtx)
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#define NFSD_UNLOCK() mtx_unlock(&nfsd_mtx)
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_NFSRVDESC);
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MALLOC_DECLARE(M_NFSD);
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#endif
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/* Forward declarations */
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struct nfssvc_sock;
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struct nfsrv_descript;
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struct uio;
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struct vattr;
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struct nameidata;
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extern struct callout nfsrv_callout;
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extern struct nfsrvstats nfsrvstats;
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extern int nfsrv_ticks;
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extern int nfsrvw_procrastinate;
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extern int nfsrvw_procrastinate_v3;
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extern int nfsrv_numnfsd;
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/* Various values converted to XDR form. */
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extern u_int32_t nfsrv_nfs_false, nfsrv_nfs_true, nfsrv_nfs_xdrneg1,
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nfsrv_nfs_prog;
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extern u_int32_t nfsrv_rpc_reply, nfsrv_rpc_msgdenied, nfsrv_rpc_mismatch,
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nfsrv_rpc_vers;
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extern u_int32_t nfsrv_rpc_auth_unix, nfsrv_rpc_msgaccepted, nfsrv_rpc_call,
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nfsrv_rpc_autherr;
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/* Procedure table data */
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extern const int nfsrvv2_procid[NFS_NPROCS];
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extern const int nfsrv_nfsv3_procid[NFS_NPROCS];
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extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *nd,
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struct nfssvc_sock *slp, struct mbuf **mreqp);
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/*
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* A list of nfssvc_sock structures is maintained with all the sockets
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* that require service by the nfsd.
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*/
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#ifndef NFS_WDELAYHASHSIZ
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#define NFS_WDELAYHASHSIZ 16 /* and with this */
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#endif
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#define NWDELAYHASH(sock, f) \
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(&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ])
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#ifdef NFS_LEGACYRPC
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/*
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* Network address hash list element
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*/
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union nethostaddr {
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u_int32_t had_inetaddr;
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struct sockaddr *had_nam;
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};
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struct nfsrv_rec {
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STAILQ_ENTRY(nfsrv_rec) nr_link;
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struct sockaddr *nr_address;
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struct mbuf *nr_packet;
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};
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struct nfssvc_sock {
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TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */
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struct file *ns_fp;
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struct socket *ns_so;
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struct sockaddr *ns_nam;
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struct mbuf *ns_raw;
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struct mbuf *ns_rawend;
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STAILQ_HEAD(, nfsrv_rec) ns_rec;
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struct mbuf *ns_frag;
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int ns_flag;
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int ns_solock;
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int ns_cc;
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int ns_reclen;
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u_int32_t ns_sref;
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LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */
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LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];
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};
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/* Bits for "ns_flag" */
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#define SLP_VALID 0x01 /* Socket valid for use (XXX) */
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#define SLP_DOREC 0x02 /* Socket ready for processing */
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#define SLP_NEEDQ 0x04 /* Socket has request queued */
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#define SLP_DISCONN 0x08 /* Error received from stream socket */
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#define SLP_GETSTREAM 0x10 /* nfsrv_getstream in prog on sock */
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#define SLP_LASTFRAG 0x20 /* Socket received end-of-record */
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#define SLP_ALLFLAGS 0xff
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extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
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extern int nfssvc_sockhead_flag;
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#define SLP_INIT 0x01
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#define SLP_WANTINIT 0x02
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/*
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* One of these structures is allocated for each nfsd.
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*/
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struct nfsd {
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TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */
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int nfsd_flag; /* NFSD_ flags */
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struct nfssvc_sock *nfsd_slp; /* Current socket */
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int nfsd_authlen; /* Authenticator len */
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u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
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int nfsd_verflen; /* and the Verifier */
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u_char nfsd_verfstr[RPCVERF_MAXSIZ];
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struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */
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};
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/* Bits for "nfsd_flag" */
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#define NFSD_WAITING 0x01
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#define NFSD_REQINPROG 0x02
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/*
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* This structure is used by the server for describing each request.
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* Some fields are used only when write request gathering is performed.
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*/
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struct nfsrv_descript {
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u_quad_t nd_time; /* Write deadline (usec) */
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off_t nd_off; /* Start byte offset */
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off_t nd_eoff; /* and end byte offset */
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LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */
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LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */
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LIST_HEAD(, nfsrv_descript) nd_coalesce;/* coalesced writes */
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struct mbuf *nd_mrep; /* Request mbuf list */
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struct mbuf *nd_md; /* Current dissect mbuf */
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struct mbuf *nd_mreq; /* Reply mbuf list */
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struct sockaddr *nd_nam; /* and socket addr */
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struct sockaddr *nd_nam2; /* return socket addr */
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caddr_t nd_dpos; /* Current dissect pos */
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u_int32_t nd_procnum; /* RPC # */
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int nd_stable; /* storage type */
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int nd_flag; /* nd_flag */
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int nd_len; /* Length of this write */
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int nd_repstat; /* Reply status */
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u_int32_t nd_retxid; /* Reply xid */
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struct timeval nd_starttime; /* Time RPC initiated */
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fhandle_t nd_fh; /* File handle */
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struct ucred *nd_cr; /* Credentials */
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int nd_credflavor; /* Security flavor */
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};
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#else
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/*
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* This structure is used by the server for describing each request.
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*/
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struct nfsrv_descript {
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struct mbuf *nd_mrep; /* Request mbuf list */
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struct mbuf *nd_md; /* Current dissect mbuf */
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struct mbuf *nd_mreq; /* Reply mbuf list */
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struct sockaddr *nd_nam; /* and socket addr */
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struct sockaddr *nd_nam2; /* return socket addr */
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caddr_t nd_dpos; /* Current dissect pos */
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u_int32_t nd_procnum; /* RPC # */
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int nd_stable; /* storage type */
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int nd_flag; /* nd_flag */
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int nd_repstat; /* Reply status */
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fhandle_t nd_fh; /* File handle */
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struct ucred *nd_cr; /* Credentials */
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int nd_credflavor; /* Security flavor */
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};
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#endif
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/* Bits for "nd_flag" */
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#define ND_NFSV3 0x08
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#ifdef NFS_LEGACYRPC
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extern TAILQ_HEAD(nfsd_head, nfsd) nfsd_head;
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extern int nfsd_head_flag;
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#define NFSD_CHECKSLP 0x01
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/*
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* These macros compare nfsrv_descript structures.
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*/
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#define NFSW_CONTIG(o, n) \
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((o)->nd_eoff >= (n)->nd_off && \
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!bcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH))
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#endif
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/*
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* Defines for WebNFS
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*/
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#define WEBNFS_ESC_CHAR '%'
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#define WEBNFS_SPECCHAR_START 0x80
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#define WEBNFS_NATIVE_CHAR 0x80
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/*
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* ..
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* Possibly more here in the future.
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*/
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/*
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* Macro for converting escape characters in WebNFS pathnames.
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* Should really be in libkern.
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*/
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#define HEXTOC(c) \
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((c) >= 'a' ? ((c) - ('a' - 10)) : \
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((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
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#define HEXSTRTOI(p) \
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((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
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#ifdef NFS_DEBUG
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extern int nfs_debug;
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#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
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#define NFS_DEBUG_WG 2 /* server write gathering */
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#define NFS_DEBUG_RC 4 /* server request caching */
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#define NFS_DPF(cat, args) \
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do { \
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if (nfs_debug & NFS_DEBUG_##cat) printf args; \
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} while (0)
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#else
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#define NFS_DPF(cat, args)
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#endif
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#ifdef NFS_LEGACYRPC
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int netaddr_match(int, union nethostaddr *, struct sockaddr *);
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int nfs_getreq(struct nfsrv_descript *, struct nfsd *, int);
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int nfsrv_send(struct socket *, struct sockaddr *, struct mbuf *);
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int nfsrv_dorec(struct nfssvc_sock *, struct nfsd *,
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struct nfsrv_descript **);
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int nfs_slplock(struct nfssvc_sock *, int);
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void nfs_slpunlock(struct nfssvc_sock *);
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void nfsrv_initcache(void);
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void nfsrv_destroycache(void);
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void nfsrv_timer(void *);
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int nfsrv_getcache(struct nfsrv_descript *, struct mbuf **);
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void nfsrv_updatecache(struct nfsrv_descript *, int, struct mbuf *);
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void nfsrv_cleancache(void);
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void nfsrv_rcv(struct socket *so, void *arg, int waitflag);
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void nfsrv_slpderef(struct nfssvc_sock *slp);
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void nfsrv_wakenfsd(struct nfssvc_sock *slp);
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int nfsrv_writegather(struct nfsrv_descript **, struct nfssvc_sock *,
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struct mbuf **);
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#endif
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struct mbuf *nfs_rephead(int, struct nfsrv_descript *, int, struct mbuf **,
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caddr_t *);
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void nfsm_srvfattr(struct nfsrv_descript *, struct vattr *,
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struct nfs_fattr *);
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void nfsm_srvwcc(struct nfsrv_descript *, int, struct vattr *, int,
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struct vattr *, struct mbuf **, char **);
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void nfsm_srvpostopattr(struct nfsrv_descript *, int, struct vattr *,
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struct mbuf **, char **);
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int nfs_namei(struct nameidata *, struct nfsrv_descript *, fhandle_t *,
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int, struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
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caddr_t *, struct vnode **, int, struct vattr *, int *, int);
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void nfsm_adj(struct mbuf *, int, int);
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int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
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void nfsrv_init(int);
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int nfsrv_errmap(struct nfsrv_descript *, int);
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void nfsrvw_sort(gid_t *, int);
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int nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_fhtovp(fhandle_t *, int, struct vnode **, int *,
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struct nfsrv_descript *, struct nfssvc_sock *, struct sockaddr *,
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int *, int);
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int nfsrv_setpublicfs(struct mount *, struct netexport *,
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struct export_args *);
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int nfs_ispublicfh(fhandle_t *);
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int nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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|
struct mbuf **mrq);
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int nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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int nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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|
struct mbuf **mrq);
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int nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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int nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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|
int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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|
int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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|
int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
|
|
int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq);
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#endif /* _KERNEL */
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#endif
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