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7ef95239a9
this is the only place that is different from all the other nfsrv_fhtovp() consumers. This simplifies nfsrv_fhtovp() a bit and also eliminates one vn_lock/VOP_UNLOCK() cycle in case of NFSv3. - Implement NFSRV_FLAG_BUSY flag for nfsrv_fhtovp() that tells it to leave mount point busy. Reviewed by: kib MFC after: 5 days
327 lines
11 KiB
C
327 lines
11 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
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* mount_nfs 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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/*
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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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/* Bits for "nd_flag" */
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#define ND_NFSV3 0x08
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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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/*
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* The following flags can be passed to nfsrv_fhtovp() function.
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*/
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/* Leave file system busy on success. */
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#define NFSRV_FLAG_BUSY 0x01
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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 *);
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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,
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struct mbuf **mrq);
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int nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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int nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq);
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/*
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* #ifdef _SYS_SYSPROTO_H_ so that it is only defined when sysproto.h
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* has been included, so that "struct nfssvc_args" is defined.
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*/
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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
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#endif /* _KERNEL */
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#endif
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