a1af9ecca4
- Each socket upcall is now invoked with the appropriate socket buffer locked. It is not permissible to call soisconnected() with this lock held; however, so socket upcalls now return an integer value. The two possible values are SU_OK and SU_ISCONNECTED. If an upcall returns SU_ISCONNECTED, then the soisconnected() will be invoked on the socket after the socket buffer lock is dropped. - A new API is provided for setting and clearing socket upcalls. The API consists of soupcall_set() and soupcall_clear(). - To simplify locking, each socket buffer now has a separate upcall. - When a socket upcall returns SU_ISCONNECTED, the upcall is cleared from the receive socket buffer automatically. Note that a SO_SND upcall should never return SU_ISCONNECTED. - All this means that accept filters should now return SU_ISCONNECTED instead of calling soisconnected() directly. They also no longer need to explicitly clear the upcall on the new socket. - The HTTP accept filter still uses soupcall_set() to manage its internal state machine, but other accept filters no longer have any explicit knowlege of socket upcall internals aside from their return value. - The various RPC client upcalls currently drop the socket buffer lock while invoking soreceive() as a temporary band-aid. The plan for the future is to add a new flag to allow soreceive() to be called with the socket buffer locked. - The AIO callback for socket I/O is now also invoked with the socket buffer locked. Previously sowakeup() would drop the socket buffer lock only to call aio_swake() which immediately re-acquired the socket buffer lock for the duration of the function call. Discussed with: rwatson, rmacklem
455 lines
15 KiB
C
455 lines
15 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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#include <nfs/nfssvc.h>
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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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* 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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int 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,
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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,
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struct mbuf **mrq);
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int nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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|
struct mbuf **mrq);
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|
int nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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|
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);
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|
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);
|
|
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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|
* #ifdef _SYS_SYSPROTO_H_ so that it is only defined when sysproto.h
|
|
* has been included, so that "struct nfssvc_args" is defined.
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|
*/
|
|
#ifdef _SYS_SYSPROTO_H_
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|
int nfssvc_nfsserver(struct thread *, struct nfssvc_args *);
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|
#endif
|
|
#endif /* _KERNEL */
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|
|
|
#endif
|