9ec7b004d0
support for NFSv4 as well as NFSv2 and 3. It lives in 3 subdirs under sys/fs: nfs - functions that are common to the client and server nfsclient - a mutation of sys/nfsclient that call generic functions to do RPCs and handle state. As such, it retains the buffer cache handling characteristics and vnode semantics that are found in sys/nfsclient, for the most part. nfsserver - the server. It includes a DRC designed specifically for NFSv4, that is used instead of the generic DRC in sys/rpc. The build glue will be checked in later, so at this point, it consists of 3 new subdirs that should not affect kernel building. Approved by: kib (mentor)
522 lines
14 KiB
C
522 lines
14 KiB
C
/*-
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* Copyright (c) 1989, 1993
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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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* These functions support the macros and help fiddle mbuf chains for
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* the nfs op functions. They do things like create the rpc header and
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* copy data between mbuf chains and uio lists.
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*/
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#ifndef APPLEKEXT
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#include <fs/nfs/nfsport.h>
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extern struct nfsstats newnfsstats;
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extern struct nfsv4_opflag nfsv4_opflag[NFSV4OP_NOPS];
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extern int ncl_mbuf_mlen;
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extern enum vtype newnv2tov_type[8];
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extern enum vtype nv34tov_type[8];
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NFSCLSTATEMUTEX;
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#endif /* !APPLEKEXT */
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static nfsuint64 nfs_nullcookie = {{ 0, 0 }};
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static struct {
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int op;
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int opcnt;
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const u_char *tag;
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int taglen;
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} nfsv4_opmap[NFS_NPROCS] = {
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{ 0, 1, "Null", 4 },
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{ NFSV4OP_GETATTR, 1, "Getattr", 7, },
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{ NFSV4OP_SETATTR, 2, "Setattr", 7, },
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{ NFSV4OP_LOOKUP, 3, "Lookup", 6, },
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{ NFSV4OP_ACCESS, 2, "Access", 6, },
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{ NFSV4OP_READLINK, 2, "Readlink", 8, },
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{ NFSV4OP_READ, 1, "Read", 4, },
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{ NFSV4OP_WRITE, 2, "Write", 5, },
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{ NFSV4OP_OPEN, 3, "Open", 4, },
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{ NFSV4OP_CREATE, 3, "Create", 6, },
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{ NFSV4OP_CREATE, 1, "Create", 6, },
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{ NFSV4OP_CREATE, 3, "Create", 6, },
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{ NFSV4OP_REMOVE, 1, "Remove", 6, },
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{ NFSV4OP_REMOVE, 1, "Remove", 6, },
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{ NFSV4OP_SAVEFH, 5, "Rename", 6, },
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{ NFSV4OP_SAVEFH, 4, "Link", 4, },
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{ NFSV4OP_READDIR, 2, "Readdir", 7, },
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{ NFSV4OP_READDIR, 2, "Readdir", 7, },
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{ NFSV4OP_GETATTR, 1, "Getattr", 7, },
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{ NFSV4OP_GETATTR, 1, "Getattr", 7, },
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{ NFSV4OP_GETATTR, 1, "Getattr", 7, },
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{ NFSV4OP_COMMIT, 2, "Commit", 6, },
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{ NFSV4OP_LOOKUPP, 3, "Lookupp", 7, },
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{ NFSV4OP_SETCLIENTID, 1, "SetClientID", 11, },
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{ NFSV4OP_SETCLIENTIDCFRM, 1, "SetClientIDConfirm", 18, },
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{ NFSV4OP_LOCK, 1, "Lock", 4, },
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{ NFSV4OP_LOCKU, 1, "LockU", 5, },
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{ NFSV4OP_OPEN, 2, "Open", 4, },
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{ NFSV4OP_CLOSE, 1, "Close", 5, },
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{ NFSV4OP_OPENCONFIRM, 1, "Openconfirm", 11, },
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{ NFSV4OP_LOCKT, 1, "LockT", 5, },
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{ NFSV4OP_OPENDOWNGRADE, 1, "Opendowngrade", 13, },
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{ NFSV4OP_RENEW, 1, "Renew", 5, },
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{ NFSV4OP_PUTROOTFH, 1, "Dirpath", 7, },
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{ NFSV4OP_RELEASELCKOWN, 1, "Rellckown", 9, },
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{ NFSV4OP_DELEGRETURN, 1, "Delegret", 8, },
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{ NFSV4OP_DELEGRETURN, 3, "DelegRemove", 11, },
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{ NFSV4OP_DELEGRETURN, 7, "DelegRename1", 12, },
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{ NFSV4OP_DELEGRETURN, 9, "DelegRename2", 12, },
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{ NFSV4OP_GETATTR, 1, "Getacl", 6, },
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{ NFSV4OP_SETATTR, 1, "Setacl", 6, },
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};
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/*
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* NFS RPCS that have large request message size.
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*/
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static int nfs_bigrequest[NFS_NPROCS] = {
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0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
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/*
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* Start building a request. Mostly just put the first file handle in
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* place.
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*/
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APPLESTATIC void
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nfscl_reqstart(struct nfsrv_descript *nd, int procnum, struct nfsmount *nmp,
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u_int8_t *nfhp, int fhlen, u_int32_t **opcntpp)
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{
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struct mbuf *mb;
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u_int32_t *tl;
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int opcnt;
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nfsattrbit_t attrbits;
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/*
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* First, fill in some of the fields of nd.
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*/
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if (NFSHASNFSV4(nmp))
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nd->nd_flag = ND_NFSV4;
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else if (NFSHASNFSV3(nmp))
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nd->nd_flag = ND_NFSV3;
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else
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nd->nd_flag = ND_NFSV2;
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nd->nd_procnum = procnum;
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nd->nd_repstat = 0;
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/*
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* Get the first mbuf for the request.
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*/
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if (nfs_bigrequest[procnum])
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NFSMCLGET(mb, M_WAIT);
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else
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NFSMGET(mb);
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mbuf_setlen(mb, 0);
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nd->nd_mreq = nd->nd_mb = mb;
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nd->nd_bpos = NFSMTOD(mb, caddr_t);
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/*
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* And fill the first file handle into the request.
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*/
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if (nd->nd_flag & ND_NFSV4) {
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opcnt = nfsv4_opmap[procnum].opcnt +
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nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh;
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/*
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* What should the tag really be?
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*/
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(void) nfsm_strtom(nd, nfsv4_opmap[procnum].tag,
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nfsv4_opmap[procnum].taglen);
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NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
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*tl++ = txdr_unsigned(NFSV4_MINORVERSION);
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if (opcntpp != NULL)
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*opcntpp = tl;
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*tl++ = txdr_unsigned(opcnt);
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if (nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh > 0) {
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*tl = txdr_unsigned(NFSV4OP_PUTFH);
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(void) nfsm_fhtom(nd, nfhp, fhlen, 0);
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if (nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh==2){
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NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
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*tl = txdr_unsigned(NFSV4OP_GETATTR);
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NFSWCCATTR_ATTRBIT(&attrbits);
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(void) nfsrv_putattrbit(nd, &attrbits);
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nd->nd_flag |= ND_V4WCCATTR;
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}
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NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
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}
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*tl = txdr_unsigned(nfsv4_opmap[procnum].op);
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} else {
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(void) nfsm_fhtom(nd, nfhp, fhlen, 0);
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}
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NFSINCRGLOBAL(newnfsstats.rpccnt[procnum]);
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}
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#ifndef APPLE
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/*
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* copies a uio scatter/gather list to an mbuf chain.
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* NOTE: can ony handle iovcnt == 1
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*/
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APPLESTATIC void
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nfsm_uiombuf(struct nfsrv_descript *nd, struct uio *uiop, int siz)
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{
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char *uiocp;
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struct mbuf *mp, *mp2;
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int xfer, left, mlen;
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int uiosiz, clflg, rem;
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char *cp, *tcp;
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#ifdef DIAGNOSTIC
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if (uiop->uio_iovcnt != 1)
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panic("nfsm_uiotombuf: iovcnt != 1");
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#endif
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if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
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clflg = 1;
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else
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clflg = 0;
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rem = NFSM_RNDUP(siz) - siz;
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mp = mp2 = nd->nd_mb;
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while (siz > 0) {
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left = uiop->uio_iov->iov_len;
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uiocp = uiop->uio_iov->iov_base;
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if (left > siz)
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left = siz;
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uiosiz = left;
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while (left > 0) {
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mlen = M_TRAILINGSPACE(mp);
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if (mlen == 0) {
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if (clflg)
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NFSMCLGET(mp, M_WAIT);
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else
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NFSMGET(mp);
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mbuf_setlen(mp, 0);
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mbuf_setnext(mp2, mp);
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mp2 = mp;
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mlen = M_TRAILINGSPACE(mp);
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}
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xfer = (left > mlen) ? mlen : left;
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#ifdef notdef
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/* Not Yet.. */
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if (uiop->uio_iov->iov_op != NULL)
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(*(uiop->uio_iov->iov_op))
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(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
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xfer);
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else
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#endif
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if (uiop->uio_segflg == UIO_SYSSPACE)
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NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
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xfer);
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else
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copyin(CAST_USER_ADDR_T(uiocp), NFSMTOD(mp, caddr_t)
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+ mbuf_len(mp), xfer);
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mbuf_setlen(mp, mbuf_len(mp) + xfer);
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left -= xfer;
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uiocp += xfer;
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uiop->uio_offset += xfer;
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uiop->uio_resid -= xfer;
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}
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tcp = (char *)uiop->uio_iov->iov_base;
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tcp += uiosiz;
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uiop->uio_iov->iov_base = (void *)tcp;
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uiop->uio_iov->iov_len -= uiosiz;
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siz -= uiosiz;
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}
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if (rem > 0) {
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if (rem > M_TRAILINGSPACE(mp)) {
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NFSMGET(mp);
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mbuf_setlen(mp, 0);
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mbuf_setnext(mp2, mp);
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}
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cp = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
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for (left = 0; left < rem; left++)
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*cp++ = '\0';
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mbuf_setlen(mp, mbuf_len(mp) + rem);
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nd->nd_bpos = cp;
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} else
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nd->nd_bpos = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
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nd->nd_mb = mp;
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}
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#endif /* !APPLE */
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/*
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* Load vnode attributes from the xdr file attributes.
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* Returns EBADRPC if they can't be parsed, 0 otherwise.
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*/
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APPLESTATIC int
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nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap)
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{
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struct nfs_fattr *fp;
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int error = 0;
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if (nd->nd_flag & ND_NFSV4) {
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error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL,
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NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL);
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} else if (nd->nd_flag & ND_NFSV3) {
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NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V3FATTR);
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nap->na_type = nfsv34tov_type(fp->fa_type);
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nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
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nap->na_rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1),
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fxdr_unsigned(u_char, fp->fa3_rdev.specdata2));
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nap->na_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
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nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
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nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
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nap->na_size = fxdr_hyper(&fp->fa3_size);
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nap->na_blocksize = NFS_FABLKSIZE;
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nap->na_bytes = fxdr_hyper(&fp->fa3_used);
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nap->na_fileid = fxdr_unsigned(int32_t,
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fp->fa3_fileid.nfsuquad[1]);
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fxdr_nfsv3time(&fp->fa3_atime, &nap->na_atime);
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fxdr_nfsv3time(&fp->fa3_ctime, &nap->na_ctime);
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fxdr_nfsv3time(&fp->fa3_mtime, &nap->na_mtime);
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nap->na_flags = 0;
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nap->na_filerev = 0;
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} else {
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NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V2FATTR);
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nap->na_type = nfsv2tov_type(fp->fa_type);
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nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
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if (nap->na_type == VNON || nap->na_type == VREG)
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nap->na_type = IFTOVT(nap->na_mode);
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nap->na_rdev = fxdr_unsigned(dev_t, fp->fa2_rdev);
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/*
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* Really ugly NFSv2 kludge.
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*/
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if (nap->na_type == VCHR && nap->na_rdev == ((dev_t)-1))
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nap->na_type = VFIFO;
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nap->na_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
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nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
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nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
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nap->na_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
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nap->na_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
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nap->na_bytes =
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(u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) *
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NFS_FABLKSIZE;
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nap->na_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
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fxdr_nfsv2time(&fp->fa2_atime, &nap->na_atime);
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fxdr_nfsv2time(&fp->fa2_mtime, &nap->na_mtime);
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nap->na_flags = 0;
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nap->na_ctime.tv_sec = fxdr_unsigned(u_int32_t,
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fp->fa2_ctime.nfsv2_sec);
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nap->na_ctime.tv_nsec = 0;
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nap->na_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
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nap->na_filerev = 0;
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}
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nfsmout:
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return (error);
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}
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/*
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* This function finds the directory cookie that corresponds to the
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* logical byte offset given.
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*/
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APPLESTATIC nfsuint64 *
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nfscl_getcookie(struct nfsnode *np, off_t off, int add)
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{
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struct nfsdmap *dp, *dp2;
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int pos;
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pos = off / NFS_DIRBLKSIZ;
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if (pos == 0) {
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#ifdef DIAGNOSTIC
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if (add)
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panic("nfs getcookie add at 0");
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#endif
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return (&nfs_nullcookie);
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}
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pos--;
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dp = LIST_FIRST(&np->n_cookies);
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if (!dp) {
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if (add) {
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MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
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M_NFSDIROFF, M_WAITOK);
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dp->ndm_eocookie = 0;
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LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
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} else
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return (NULL);
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}
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while (pos >= NFSNUMCOOKIES) {
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pos -= NFSNUMCOOKIES;
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if (LIST_NEXT(dp, ndm_list) != NULL) {
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if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
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pos >= dp->ndm_eocookie)
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return (NULL);
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dp = LIST_NEXT(dp, ndm_list);
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} else if (add) {
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MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
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M_NFSDIROFF, M_WAITOK);
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dp2->ndm_eocookie = 0;
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LIST_INSERT_AFTER(dp, dp2, ndm_list);
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dp = dp2;
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} else
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return (NULL);
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}
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if (pos >= dp->ndm_eocookie) {
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if (add)
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dp->ndm_eocookie = pos + 1;
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else
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return (NULL);
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}
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return (&dp->ndm_cookies[pos]);
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}
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/*
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* Gets a file handle out of an nfs reply sent to the client and returns
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* the file handle and the file's attributes.
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* For V4, it assumes that Getfh and Getattr Op's results are here.
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*/
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APPLESTATIC int
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nfscl_mtofh(struct nfsrv_descript *nd, struct nfsfh **nfhpp,
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struct nfsvattr *nap, int *attrflagp)
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{
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u_int32_t *tl;
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int error = 0, flag = 1;
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*nfhpp = NULL;
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*attrflagp = 0;
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/*
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* First get the file handle and vnode.
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*/
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if (nd->nd_flag & ND_NFSV3) {
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NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
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flag = fxdr_unsigned(int, *tl);
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} else if (nd->nd_flag & ND_NFSV4) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
}
|
|
if (flag) {
|
|
error = nfsm_getfh(nd, nfhpp);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Now, get the attributes.
|
|
*/
|
|
if (nd->nd_flag & ND_NFSV4) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
} else if (nd->nd_flag & ND_NFSV3) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (flag) {
|
|
flag = fxdr_unsigned(int, *tl);
|
|
} else if (fxdr_unsigned(int, *tl)) {
|
|
error = nfsm_advance(nd, NFSX_V3FATTR, -1);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
if (flag) {
|
|
error = nfsm_loadattr(nd, nap);
|
|
if (!error)
|
|
*attrflagp = 1;
|
|
}
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Put a state Id in the mbuf list.
|
|
*/
|
|
APPLESTATIC void
|
|
nfsm_stateidtom(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, int flag)
|
|
{
|
|
nfsv4stateid_t *st;
|
|
|
|
NFSM_BUILD(st, nfsv4stateid_t *, NFSX_STATEID);
|
|
if (flag == NFSSTATEID_PUTALLZERO) {
|
|
st->seqid = 0;
|
|
st->other[0] = 0;
|
|
st->other[1] = 0;
|
|
st->other[2] = 0;
|
|
} else if (flag == NFSSTATEID_PUTALLONE) {
|
|
st->seqid = 0xffffffff;
|
|
st->other[0] = 0xffffffff;
|
|
st->other[1] = 0xffffffff;
|
|
st->other[2] = 0xffffffff;
|
|
} else {
|
|
st->seqid = stateidp->seqid;
|
|
st->other[0] = stateidp->other[0];
|
|
st->other[1] = stateidp->other[1];
|
|
st->other[2] = stateidp->other[2];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize the owner/delegation sleep lock.
|
|
*/
|
|
APPLESTATIC void
|
|
nfscl_lockinit(struct nfsv4lock *lckp)
|
|
{
|
|
|
|
lckp->nfslock_usecnt = 0;
|
|
lckp->nfslock_lock = 0;
|
|
}
|
|
|
|
/*
|
|
* Get an exclusive lock. (Not needed for OpenBSD4, since there is only one
|
|
* thread for each posix process in the kernel.)
|
|
*/
|
|
APPLESTATIC void
|
|
nfscl_lockexcl(struct nfsv4lock *lckp, void *mutex)
|
|
{
|
|
int igotlock;
|
|
|
|
do {
|
|
igotlock = nfsv4_lock(lckp, 1, NULL, mutex);
|
|
} while (!igotlock);
|
|
}
|
|
|
|
/*
|
|
* Release an exclusive lock.
|
|
*/
|
|
APPLESTATIC void
|
|
nfscl_lockunlock(struct nfsv4lock *lckp)
|
|
{
|
|
|
|
nfsv4_unlock(lckp, 0);
|
|
}
|
|
|
|
/*
|
|
* Called to derefernce a lock on a stateid (delegation or open owner).
|
|
*/
|
|
APPLESTATIC void
|
|
nfscl_lockderef(struct nfsv4lock *lckp)
|
|
{
|
|
|
|
NFSLOCKCLSTATE();
|
|
lckp->nfslock_usecnt--;
|
|
if (lckp->nfslock_usecnt == 0 && (lckp->nfslock_lock & NFSV4LOCK_WANTED)) {
|
|
lckp->nfslock_lock &= ~NFSV4LOCK_WANTED;
|
|
wakeup((caddr_t)lckp);
|
|
}
|
|
NFSUNLOCKCLSTATE();
|
|
}
|
|
|