The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsclient/nfs_clrpcops.c

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    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: stable/11/sys/fs/nfsclient/nfs_clrpcops.c 361236 2020-05-19 01:43:00Z freqlabs $");
   36 
   37 /*
   38  * Rpc op calls, generally called from the vnode op calls or through the
   39  * buffer cache, for NFS v2, 3 and 4.
   40  * These do not normally make any changes to vnode arguments or use
   41  * structures that might change between the VFS variants. The returned
   42  * arguments are all at the end, after the NFSPROC_T *p one.
   43  */
   44 
   45 #include "opt_inet6.h"
   46 
   47 #include <fs/nfs/nfsport.h>
   48 #include <sys/sysctl.h>
   49 
   50 SYSCTL_DECL(_vfs_nfs);
   51 
   52 static int      nfsignore_eexist = 0;
   53 SYSCTL_INT(_vfs_nfs, OID_AUTO, ignore_eexist, CTLFLAG_RW,
   54     &nfsignore_eexist, 0, "NFS ignore EEXIST replies for mkdir/symlink");
   55 
   56 /*
   57  * Global variables
   58  */
   59 extern int nfs_numnfscbd;
   60 extern struct timeval nfsboottime;
   61 extern u_int32_t newnfs_false, newnfs_true;
   62 extern nfstype nfsv34_type[9];
   63 extern int nfsrv_useacl;
   64 extern char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
   65 extern int nfscl_debuglevel;
   66 NFSCLSTATEMUTEX;
   67 int nfstest_outofseq = 0;
   68 int nfscl_assumeposixlocks = 1;
   69 int nfscl_enablecallb = 0;
   70 short nfsv4_cbport = NFSV4_CBPORT;
   71 int nfstest_openallsetattr = 0;
   72 
   73 #define DIRHDSIZ        (sizeof (struct dirent) - (MAXNAMLEN + 1))
   74 
   75 /*
   76  * nfscl_getsameserver() can return one of three values:
   77  * NFSDSP_USETHISSESSION - Use this session for the DS.
   78  * NFSDSP_SEQTHISSESSION - Use the nfsclds_sequence field of this dsp for new
   79  *     session.
   80  * NFSDSP_NOTFOUND - No matching server was found.
   81  */
   82 enum nfsclds_state {
   83         NFSDSP_USETHISSESSION = 0,
   84         NFSDSP_SEQTHISSESSION = 1,
   85         NFSDSP_NOTFOUND = 2,
   86 };
   87 
   88 static int nfsrpc_setattrrpc(vnode_t , struct vattr *, nfsv4stateid_t *,
   89     struct ucred *, NFSPROC_T *, struct nfsvattr *, int *, void *);
   90 static int nfsrpc_readrpc(vnode_t , struct uio *, struct ucred *,
   91     nfsv4stateid_t *, NFSPROC_T *, struct nfsvattr *, int *, void *);
   92 static int nfsrpc_writerpc(vnode_t , struct uio *, int *, int *,
   93     struct ucred *, nfsv4stateid_t *, NFSPROC_T *, struct nfsvattr *, int *,
   94     void *);
   95 static int nfsrpc_createv23(vnode_t , char *, int, struct vattr *,
   96     nfsquad_t, int, struct ucred *, NFSPROC_T *, struct nfsvattr *,
   97     struct nfsvattr *, struct nfsfh **, int *, int *, void *);
   98 static int nfsrpc_createv4(vnode_t , char *, int, struct vattr *,
   99     nfsquad_t, int, struct nfsclowner *, struct nfscldeleg **, struct ucred *,
  100     NFSPROC_T *, struct nfsvattr *, struct nfsvattr *, struct nfsfh **, int *,
  101     int *, void *, int *);
  102 static int nfsrpc_locku(struct nfsrv_descript *, struct nfsmount *,
  103     struct nfscllockowner *, u_int64_t, u_int64_t,
  104     u_int32_t, struct ucred *, NFSPROC_T *, int);
  105 static int nfsrpc_setaclrpc(vnode_t, struct ucred *, NFSPROC_T *,
  106     struct acl *, nfsv4stateid_t *, void *);
  107 static int nfsrpc_getlayout(struct nfsmount *, vnode_t, struct nfsfh *, int,
  108     uint32_t *, nfsv4stateid_t *, uint64_t, struct nfscllayout **,
  109     struct ucred *, NFSPROC_T *);
  110 static int nfsrpc_fillsa(struct nfsmount *, struct sockaddr_storage *,
  111     struct nfsclds **, NFSPROC_T *);
  112 static void nfscl_initsessionslots(struct nfsclsession *);
  113 static int nfscl_doflayoutio(vnode_t, struct uio *, int *, int *, int *,
  114     nfsv4stateid_t *, int, struct nfscldevinfo *, struct nfscllayout *,
  115     struct nfsclflayout *, uint64_t, uint64_t, int, struct ucred *,
  116     NFSPROC_T *);
  117 static int nfsrpc_readds(vnode_t, struct uio *, nfsv4stateid_t *, int *,
  118     struct nfsclds *, uint64_t, int, struct nfsfh *, struct ucred *,
  119     NFSPROC_T *);
  120 static int nfsrpc_writeds(vnode_t, struct uio *, int *, int *,
  121     nfsv4stateid_t *, struct nfsclds *, uint64_t, int,
  122     struct nfsfh *, int, struct ucred *, NFSPROC_T *);
  123 static enum nfsclds_state nfscl_getsameserver(struct nfsmount *,
  124     struct nfsclds *, struct nfsclds **);
  125 static int nfsrpc_commitds(vnode_t, uint64_t, int, struct nfsclds *,
  126     struct nfsfh *, struct ucred *, NFSPROC_T *);
  127 static void nfsrv_setuplayoutget(struct nfsrv_descript *, int, uint64_t,
  128     uint64_t, uint64_t, nfsv4stateid_t *, int, int);
  129 static int nfsrv_parselayoutget(struct nfsrv_descript *, nfsv4stateid_t *,
  130     int *, struct nfsclflayouthead *);
  131 static int nfsrpc_getopenlayout(struct nfsmount *, vnode_t, u_int8_t *,
  132     int, uint8_t *, int, uint32_t, struct nfsclopen *, uint8_t *, int,
  133     struct nfscldeleg **, struct ucred *, NFSPROC_T *);
  134 static int nfsrpc_getcreatelayout(vnode_t, char *, int, struct vattr *,
  135     nfsquad_t, int, struct nfsclowner *, struct nfscldeleg **,
  136     struct ucred *, NFSPROC_T *, struct nfsvattr *, struct nfsvattr *,
  137     struct nfsfh **, int *, int *, void *, int *);
  138 static int nfsrpc_openlayoutrpc(struct nfsmount *, vnode_t, u_int8_t *,
  139     int, uint8_t *, int, uint32_t, struct nfsclopen *, uint8_t *, int,
  140     struct nfscldeleg **, nfsv4stateid_t *, int, int, int *,
  141     struct nfsclflayouthead *, int *, struct ucred *, NFSPROC_T *);
  142 static int nfsrpc_createlayout(vnode_t, char *, int, struct vattr *,
  143     nfsquad_t, int, struct nfsclowner *, struct nfscldeleg **,
  144     struct ucred *, NFSPROC_T *, struct nfsvattr *, struct nfsvattr *,
  145     struct nfsfh **, int *, int *, void *, int *, nfsv4stateid_t *,
  146     int, int, int *, struct nfsclflayouthead *, int *);
  147 static int nfsrpc_layoutgetres(struct nfsmount *, vnode_t, uint8_t *,
  148     int, nfsv4stateid_t *, int, uint32_t *, struct nfscllayout **,
  149     struct nfsclflayouthead *, int, int *, struct ucred *, NFSPROC_T *);
  150 
  151 /*
  152  * nfs null call from vfs.
  153  */
  154 int
  155 nfsrpc_null(vnode_t vp, struct ucred *cred, NFSPROC_T *p)
  156 {
  157         int error;
  158         struct nfsrv_descript nfsd, *nd = &nfsd;
  159         
  160         NFSCL_REQSTART(nd, NFSPROC_NULL, vp);
  161         error = nfscl_request(nd, vp, p, cred, NULL);
  162         if (nd->nd_repstat && !error)
  163                 error = nd->nd_repstat;
  164         mbuf_freem(nd->nd_mrep);
  165         return (error);
  166 }
  167 
  168 /*
  169  * nfs access rpc op.
  170  * For nfs version 3 and 4, use the access rpc to check accessibility. If file
  171  * modes are changed on the server, accesses might still fail later.
  172  */
  173 int
  174 nfsrpc_access(vnode_t vp, int acmode, struct ucred *cred,
  175     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp)
  176 {
  177         int error;
  178         u_int32_t mode, rmode;
  179 
  180         if (acmode & VREAD)
  181                 mode = NFSACCESS_READ;
  182         else
  183                 mode = 0;
  184         if (vnode_vtype(vp) == VDIR) {
  185                 if (acmode & VWRITE)
  186                         mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND |
  187                                  NFSACCESS_DELETE);
  188                 if (acmode & VEXEC)
  189                         mode |= NFSACCESS_LOOKUP;
  190         } else {
  191                 if (acmode & VWRITE)
  192                         mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
  193                 if (acmode & VEXEC)
  194                         mode |= NFSACCESS_EXECUTE;
  195         }
  196 
  197         /*
  198          * Now, just call nfsrpc_accessrpc() to do the actual RPC.
  199          */
  200         error = nfsrpc_accessrpc(vp, mode, cred, p, nap, attrflagp, &rmode,
  201             NULL);
  202 
  203         /*
  204          * The NFS V3 spec does not clarify whether or not
  205          * the returned access bits can be a superset of
  206          * the ones requested, so...
  207          */
  208         if (!error && (rmode & mode) != mode)
  209                 error = EACCES;
  210         return (error);
  211 }
  212 
  213 /*
  214  * The actual rpc, separated out for Darwin.
  215  */
  216 int
  217 nfsrpc_accessrpc(vnode_t vp, u_int32_t mode, struct ucred *cred,
  218     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, u_int32_t *rmodep,
  219     void *stuff)
  220 {
  221         u_int32_t *tl;
  222         u_int32_t supported, rmode;
  223         int error;
  224         struct nfsrv_descript nfsd, *nd = &nfsd;
  225         nfsattrbit_t attrbits;
  226 
  227         *attrflagp = 0;
  228         supported = mode;
  229         NFSCL_REQSTART(nd, NFSPROC_ACCESS, vp);
  230         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  231         *tl = txdr_unsigned(mode);
  232         if (nd->nd_flag & ND_NFSV4) {
  233                 /*
  234                  * And do a Getattr op.
  235                  */
  236                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  237                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
  238                 NFSGETATTR_ATTRBIT(&attrbits);
  239                 (void) nfsrv_putattrbit(nd, &attrbits);
  240         }
  241         error = nfscl_request(nd, vp, p, cred, stuff);
  242         if (error)
  243                 return (error);
  244         if (nd->nd_flag & ND_NFSV3) {
  245                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
  246                 if (error)
  247                         goto nfsmout;
  248         }
  249         if (!nd->nd_repstat) {
  250                 if (nd->nd_flag & ND_NFSV4) {
  251                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  252                         supported = fxdr_unsigned(u_int32_t, *tl++);
  253                 } else {
  254                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
  255                 }
  256                 rmode = fxdr_unsigned(u_int32_t, *tl);
  257                 if (nd->nd_flag & ND_NFSV4)
  258                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
  259 
  260                 /*
  261                  * It's not obvious what should be done about
  262                  * unsupported access modes. For now, be paranoid
  263                  * and clear the unsupported ones.
  264                  */
  265                 rmode &= supported;
  266                 *rmodep = rmode;
  267         } else
  268                 error = nd->nd_repstat;
  269 nfsmout:
  270         mbuf_freem(nd->nd_mrep);
  271         return (error);
  272 }
  273 
  274 /*
  275  * nfs open rpc
  276  */
  277 int
  278 nfsrpc_open(vnode_t vp, int amode, struct ucred *cred, NFSPROC_T *p)
  279 {
  280         struct nfsclopen *op;
  281         struct nfscldeleg *dp;
  282         struct nfsfh *nfhp;
  283         struct nfsnode *np = VTONFS(vp);
  284         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
  285         u_int32_t mode, clidrev;
  286         int ret, newone, error, expireret = 0, retrycnt;
  287 
  288         /*
  289          * For NFSv4, Open Ops are only done on Regular Files.
  290          */
  291         if (vnode_vtype(vp) != VREG)
  292                 return (0);
  293         mode = 0;
  294         if (amode & FREAD)
  295                 mode |= NFSV4OPEN_ACCESSREAD;
  296         if (amode & FWRITE)
  297                 mode |= NFSV4OPEN_ACCESSWRITE;
  298         nfhp = np->n_fhp;
  299 
  300         retrycnt = 0;
  301 #ifdef notdef
  302 { char name[100]; int namel;
  303 namel = (np->n_v4->n4_namelen < 100) ? np->n_v4->n4_namelen : 99;
  304 bcopy(NFS4NODENAME(np->n_v4), name, namel);
  305 name[namel] = '\0';
  306 printf("rpcopen p=0x%x name=%s",p->p_pid,name);
  307 if (nfhp->nfh_len > 0) printf(" fh=0x%x\n",nfhp->nfh_fh[12]);
  308 else printf(" fhl=0\n");
  309 }
  310 #endif
  311         do {
  312             dp = NULL;
  313             error = nfscl_open(vp, nfhp->nfh_fh, nfhp->nfh_len, mode, 1,
  314                 cred, p, NULL, &op, &newone, &ret, 1);
  315             if (error) {
  316                 return (error);
  317             }
  318             if (nmp->nm_clp != NULL)
  319                 clidrev = nmp->nm_clp->nfsc_clientidrev;
  320             else
  321                 clidrev = 0;
  322             if (ret == NFSCLOPEN_DOOPEN) {
  323                 if (np->n_v4 != NULL) {
  324                         /*
  325                          * For the first attempt, try and get a layout, if
  326                          * pNFS is enabled for the mount.
  327                          */
  328                         if (!NFSHASPNFS(nmp) || nfscl_enablecallb == 0 ||
  329                             nfs_numnfscbd == 0 ||
  330                             (np->n_flag & NNOLAYOUT) != 0 || retrycnt > 0)
  331                                 error = nfsrpc_openrpc(nmp, vp,
  332                                     np->n_v4->n4_data,
  333                                     np->n_v4->n4_fhlen, np->n_fhp->nfh_fh,
  334                                     np->n_fhp->nfh_len, mode, op,
  335                                     NFS4NODENAME(np->n_v4),
  336                                     np->n_v4->n4_namelen,
  337                                     &dp, 0, 0x0, cred, p, 0, 0);
  338                         else
  339                                 error = nfsrpc_getopenlayout(nmp, vp,
  340                                     np->n_v4->n4_data,
  341                                     np->n_v4->n4_fhlen, np->n_fhp->nfh_fh,
  342                                     np->n_fhp->nfh_len, mode, op,
  343                                     NFS4NODENAME(np->n_v4),
  344                                     np->n_v4->n4_namelen, &dp, cred, p);
  345                         if (dp != NULL) {
  346 #ifdef APPLE
  347                                 OSBitAndAtomic((int32_t)~NDELEGMOD, (UInt32 *)&np->n_flag);
  348 #else
  349                                 NFSLOCKNODE(np);
  350                                 np->n_flag &= ~NDELEGMOD;
  351                                 /*
  352                                  * Invalidate the attribute cache, so that
  353                                  * attributes that pre-date the issue of a
  354                                  * delegation are not cached, since the
  355                                  * cached attributes will remain valid while
  356                                  * the delegation is held.
  357                                  */
  358                                 NFSINVALATTRCACHE(np);
  359                                 NFSUNLOCKNODE(np);
  360 #endif
  361                                 (void) nfscl_deleg(nmp->nm_mountp,
  362                                     op->nfso_own->nfsow_clp,
  363                                     nfhp->nfh_fh, nfhp->nfh_len, cred, p, &dp);
  364                         }
  365                 } else {
  366                         error = EIO;
  367                 }
  368                 newnfs_copyincred(cred, &op->nfso_cred);
  369             } else if (ret == NFSCLOPEN_SETCRED)
  370                 /*
  371                  * This is a new local open on a delegation. It needs
  372                  * to have credentials so that an open can be done
  373                  * against the server during recovery.
  374                  */
  375                 newnfs_copyincred(cred, &op->nfso_cred);
  376 
  377             /*
  378              * nfso_opencnt is the count of how many VOP_OPEN()s have
  379              * been done on this Open successfully and a VOP_CLOSE()
  380              * is expected for each of these.
  381              * If error is non-zero, don't increment it, since the Open
  382              * hasn't succeeded yet.
  383              */
  384             if (!error)
  385                 op->nfso_opencnt++;
  386             nfscl_openrelease(nmp, op, error, newone);
  387             if (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
  388                 error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
  389                 error == NFSERR_BADSESSION) {
  390                 (void) nfs_catnap(PZERO, error, "nfs_open");
  391             } else if ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID)
  392                 && clidrev != 0) {
  393                 expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
  394                 retrycnt++;
  395             }
  396         } while (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
  397             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
  398             error == NFSERR_BADSESSION ||
  399             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
  400              expireret == 0 && clidrev != 0 && retrycnt < 4));
  401         if (error && retrycnt >= 4)
  402                 error = EIO;
  403         return (error);
  404 }
  405 
  406 /*
  407  * the actual open rpc
  408  */
  409 int
  410 nfsrpc_openrpc(struct nfsmount *nmp, vnode_t vp, u_int8_t *nfhp, int fhlen,
  411     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
  412     u_int8_t *name, int namelen, struct nfscldeleg **dpp,
  413     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p,
  414     int syscred, int recursed)
  415 {
  416         u_int32_t *tl;
  417         struct nfsrv_descript nfsd, *nd = &nfsd;
  418         struct nfscldeleg *dp, *ndp = NULL;
  419         struct nfsvattr nfsva;
  420         u_int32_t rflags, deleg;
  421         nfsattrbit_t attrbits;
  422         int error, ret, acesize, limitby;
  423         struct nfsclsession *tsep;
  424 
  425         dp = *dpp;
  426         *dpp = NULL;
  427         nfscl_reqstart(nd, NFSPROC_OPEN, nmp, nfhp, fhlen, NULL, NULL);
  428         NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
  429         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  430         *tl++ = txdr_unsigned(mode & NFSV4OPEN_ACCESSBOTH);
  431         *tl++ = txdr_unsigned((mode >> NFSLCK_SHIFT) & NFSV4OPEN_DENYBOTH);
  432         tsep = nfsmnt_mdssession(nmp);
  433         *tl++ = tsep->nfsess_clientid.lval[0];
  434         *tl = tsep->nfsess_clientid.lval[1];
  435         (void) nfsm_strtom(nd, op->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN);
  436         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  437         *tl++ = txdr_unsigned(NFSV4OPEN_NOCREATE);
  438         if (reclaim) {
  439                 *tl = txdr_unsigned(NFSV4OPEN_CLAIMPREVIOUS);
  440                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  441                 *tl = txdr_unsigned(delegtype);
  442         } else {
  443                 if (dp != NULL) {
  444                         *tl = txdr_unsigned(NFSV4OPEN_CLAIMDELEGATECUR);
  445                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
  446                         if (NFSHASNFSV4N(nmp))
  447                                 *tl++ = 0;
  448                         else
  449                                 *tl++ = dp->nfsdl_stateid.seqid;
  450                         *tl++ = dp->nfsdl_stateid.other[0];
  451                         *tl++ = dp->nfsdl_stateid.other[1];
  452                         *tl = dp->nfsdl_stateid.other[2];
  453                 } else {
  454                         *tl = txdr_unsigned(NFSV4OPEN_CLAIMNULL);
  455                 }
  456                 (void) nfsm_strtom(nd, name, namelen);
  457         }
  458         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  459         *tl = txdr_unsigned(NFSV4OP_GETATTR);
  460         NFSZERO_ATTRBIT(&attrbits);
  461         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE);
  462         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY);
  463         (void) nfsrv_putattrbit(nd, &attrbits);
  464         if (syscred)
  465                 nd->nd_flag |= ND_USEGSSNAME;
  466         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
  467             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
  468         if (error)
  469                 return (error);
  470         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  471         if (!nd->nd_repstat) {
  472                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
  473                     6 * NFSX_UNSIGNED);
  474                 op->nfso_stateid.seqid = *tl++;
  475                 op->nfso_stateid.other[0] = *tl++;
  476                 op->nfso_stateid.other[1] = *tl++;
  477                 op->nfso_stateid.other[2] = *tl;
  478                 rflags = fxdr_unsigned(u_int32_t, *(tl + 6));
  479                 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
  480                 if (error)
  481                         goto nfsmout;
  482                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
  483                 deleg = fxdr_unsigned(u_int32_t, *tl);
  484                 if (deleg == NFSV4OPEN_DELEGATEREAD ||
  485                     deleg == NFSV4OPEN_DELEGATEWRITE) {
  486                         if (!(op->nfso_own->nfsow_clp->nfsc_flags &
  487                               NFSCLFLAGS_FIRSTDELEG))
  488                                 op->nfso_own->nfsow_clp->nfsc_flags |=
  489                                   (NFSCLFLAGS_FIRSTDELEG | NFSCLFLAGS_GOTDELEG);
  490                         MALLOC(ndp, struct nfscldeleg *,
  491                             sizeof (struct nfscldeleg) + newfhlen,
  492                             M_NFSCLDELEG, M_WAITOK);
  493                         LIST_INIT(&ndp->nfsdl_owner);
  494                         LIST_INIT(&ndp->nfsdl_lock);
  495                         ndp->nfsdl_clp = op->nfso_own->nfsow_clp;
  496                         ndp->nfsdl_fhlen = newfhlen;
  497                         NFSBCOPY(newfhp, ndp->nfsdl_fh, newfhlen);
  498                         newnfs_copyincred(cred, &ndp->nfsdl_cred);
  499                         nfscl_lockinit(&ndp->nfsdl_rwlock);
  500                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
  501                             NFSX_UNSIGNED);
  502                         ndp->nfsdl_stateid.seqid = *tl++;
  503                         ndp->nfsdl_stateid.other[0] = *tl++;
  504                         ndp->nfsdl_stateid.other[1] = *tl++;
  505                         ndp->nfsdl_stateid.other[2] = *tl++;
  506                         ret = fxdr_unsigned(int, *tl);
  507                         if (deleg == NFSV4OPEN_DELEGATEWRITE) {
  508                                 ndp->nfsdl_flags = NFSCLDL_WRITE;
  509                                 /*
  510                                  * Indicates how much the file can grow.
  511                                  */
  512                                 NFSM_DISSECT(tl, u_int32_t *,
  513                                     3 * NFSX_UNSIGNED);
  514                                 limitby = fxdr_unsigned(int, *tl++);
  515                                 switch (limitby) {
  516                                 case NFSV4OPEN_LIMITSIZE:
  517                                         ndp->nfsdl_sizelimit = fxdr_hyper(tl);
  518                                         break;
  519                                 case NFSV4OPEN_LIMITBLOCKS:
  520                                         ndp->nfsdl_sizelimit =
  521                                             fxdr_unsigned(u_int64_t, *tl++);
  522                                         ndp->nfsdl_sizelimit *=
  523                                             fxdr_unsigned(u_int64_t, *tl);
  524                                         break;
  525                                 default:
  526                                         error = NFSERR_BADXDR;
  527                                         goto nfsmout;
  528                                 }
  529                         } else {
  530                                 ndp->nfsdl_flags = NFSCLDL_READ;
  531                         }
  532                         if (ret)
  533                                 ndp->nfsdl_flags |= NFSCLDL_RECALL;
  534                         error = nfsrv_dissectace(nd, &ndp->nfsdl_ace, &ret,
  535                             &acesize, p);
  536                         if (error)
  537                                 goto nfsmout;
  538                 } else if (deleg != NFSV4OPEN_DELEGATENONE) {
  539                         error = NFSERR_BADXDR;
  540                         goto nfsmout;
  541                 }
  542                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  543                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
  544                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
  545                     NULL, NULL, NULL, p, cred);
  546                 if (error)
  547                         goto nfsmout;
  548                 if (ndp != NULL) {
  549                         ndp->nfsdl_change = nfsva.na_filerev;
  550                         ndp->nfsdl_modtime = nfsva.na_mtime;
  551                         ndp->nfsdl_flags |= NFSCLDL_MODTIMESET;
  552                 }
  553                 if (!reclaim && (rflags & NFSV4OPEN_RESULTCONFIRM)) {
  554                     do {
  555                         ret = nfsrpc_openconfirm(vp, newfhp, newfhlen, op,
  556                             cred, p);
  557                         if (ret == NFSERR_DELAY)
  558                             (void) nfs_catnap(PZERO, ret, "nfs_open");
  559                     } while (ret == NFSERR_DELAY);
  560                     error = ret;
  561                 }
  562                 if ((rflags & NFSV4OPEN_LOCKTYPEPOSIX) ||
  563                     nfscl_assumeposixlocks)
  564                     op->nfso_posixlock = 1;
  565                 else
  566                     op->nfso_posixlock = 0;
  567 
  568                 /*
  569                  * If the server is handing out delegations, but we didn't
  570                  * get one because an OpenConfirm was required, try the
  571                  * Open again, to get a delegation. This is a harmless no-op,
  572                  * from a server's point of view.
  573                  */
  574                 if (!reclaim && (rflags & NFSV4OPEN_RESULTCONFIRM) &&
  575                     (op->nfso_own->nfsow_clp->nfsc_flags & NFSCLFLAGS_GOTDELEG)
  576                     && !error && dp == NULL && ndp == NULL && !recursed) {
  577                     do {
  578                         ret = nfsrpc_openrpc(nmp, vp, nfhp, fhlen, newfhp,
  579                             newfhlen, mode, op, name, namelen, &ndp, 0, 0x0,
  580                             cred, p, syscred, 1);
  581                         if (ret == NFSERR_DELAY)
  582                             (void) nfs_catnap(PZERO, ret, "nfs_open2");
  583                     } while (ret == NFSERR_DELAY);
  584                     if (ret) {
  585                         if (ndp != NULL) {
  586                                 FREE((caddr_t)ndp, M_NFSCLDELEG);
  587                                 ndp = NULL;
  588                         }
  589                         if (ret == NFSERR_STALECLIENTID ||
  590                             ret == NFSERR_STALEDONTRECOVER ||
  591                             ret == NFSERR_BADSESSION)
  592                                 error = ret;
  593                     }
  594                 }
  595         }
  596         if (nd->nd_repstat != 0 && error == 0)
  597                 error = nd->nd_repstat;
  598         if (error == NFSERR_STALECLIENTID)
  599                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  600 nfsmout:
  601         if (!error)
  602                 *dpp = ndp;
  603         else if (ndp != NULL)
  604                 FREE((caddr_t)ndp, M_NFSCLDELEG);
  605         mbuf_freem(nd->nd_mrep);
  606         return (error);
  607 }
  608 
  609 /*
  610  * open downgrade rpc
  611  */
  612 int
  613 nfsrpc_opendowngrade(vnode_t vp, u_int32_t mode, struct nfsclopen *op,
  614     struct ucred *cred, NFSPROC_T *p)
  615 {
  616         u_int32_t *tl;
  617         struct nfsrv_descript nfsd, *nd = &nfsd;
  618         int error;
  619 
  620         NFSCL_REQSTART(nd, NFSPROC_OPENDOWNGRADE, vp);
  621         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + 3 * NFSX_UNSIGNED);
  622         if (NFSHASNFSV4N(VFSTONFS(vnode_mount(vp))))
  623                 *tl++ = 0;
  624         else
  625                 *tl++ = op->nfso_stateid.seqid;
  626         *tl++ = op->nfso_stateid.other[0];
  627         *tl++ = op->nfso_stateid.other[1];
  628         *tl++ = op->nfso_stateid.other[2];
  629         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  630         *tl++ = txdr_unsigned(mode & NFSV4OPEN_ACCESSBOTH);
  631         *tl = txdr_unsigned((mode >> NFSLCK_SHIFT) & NFSV4OPEN_DENYBOTH);
  632         error = nfscl_request(nd, vp, p, cred, NULL);
  633         if (error)
  634                 return (error);
  635         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  636         if (!nd->nd_repstat) {
  637                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  638                 op->nfso_stateid.seqid = *tl++;
  639                 op->nfso_stateid.other[0] = *tl++;
  640                 op->nfso_stateid.other[1] = *tl++;
  641                 op->nfso_stateid.other[2] = *tl;
  642         }
  643         if (nd->nd_repstat && error == 0)
  644                 error = nd->nd_repstat;
  645         if (error == NFSERR_STALESTATEID)
  646                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  647 nfsmout:
  648         mbuf_freem(nd->nd_mrep);
  649         return (error);
  650 }
  651 
  652 /*
  653  * V4 Close operation.
  654  */
  655 int
  656 nfsrpc_close(vnode_t vp, int doclose, NFSPROC_T *p)
  657 {
  658         struct nfsclclient *clp;
  659         int error;
  660 
  661         if (vnode_vtype(vp) != VREG)
  662                 return (0);
  663         if (doclose)
  664                 error = nfscl_doclose(vp, &clp, p);
  665         else
  666                 error = nfscl_getclose(vp, &clp);
  667         if (error)
  668                 return (error);
  669 
  670         nfscl_clientrelease(clp);
  671         return (0);
  672 }
  673 
  674 /*
  675  * Close the open.
  676  */
  677 void
  678 nfsrpc_doclose(struct nfsmount *nmp, struct nfsclopen *op, NFSPROC_T *p)
  679 {
  680         struct nfsrv_descript nfsd, *nd = &nfsd;
  681         struct nfscllockowner *lp, *nlp;
  682         struct nfscllock *lop, *nlop;
  683         struct ucred *tcred;
  684         u_int64_t off = 0, len = 0;
  685         u_int32_t type = NFSV4LOCKT_READ;
  686         int error, do_unlock, trycnt;
  687 
  688         tcred = newnfs_getcred();
  689         newnfs_copycred(&op->nfso_cred, tcred);
  690         /*
  691          * (Theoretically this could be done in the same
  692          *  compound as the close, but having multiple
  693          *  sequenced Ops in the same compound might be
  694          *  too scary for some servers.)
  695          */
  696         if (op->nfso_posixlock) {
  697                 off = 0;
  698                 len = NFS64BITSSET;
  699                 type = NFSV4LOCKT_READ;
  700         }
  701 
  702         /*
  703          * Since this function is only called from VOP_INACTIVE(), no
  704          * other thread will be manipulating this Open. As such, the
  705          * lock lists are not being changed by other threads, so it should
  706          * be safe to do this without locking.
  707          */
  708         LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
  709                 do_unlock = 1;
  710                 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
  711                         if (op->nfso_posixlock == 0) {
  712                                 off = lop->nfslo_first;
  713                                 len = lop->nfslo_end - lop->nfslo_first;
  714                                 if (lop->nfslo_type == F_WRLCK)
  715                                         type = NFSV4LOCKT_WRITE;
  716                                 else
  717                                         type = NFSV4LOCKT_READ;
  718                         }
  719                         if (do_unlock) {
  720                                 trycnt = 0;
  721                                 do {
  722                                         error = nfsrpc_locku(nd, nmp, lp, off,
  723                                             len, type, tcred, p, 0);
  724                                         if ((nd->nd_repstat == NFSERR_GRACE ||
  725                                             nd->nd_repstat == NFSERR_DELAY) &&
  726                                             error == 0)
  727                                                 (void) nfs_catnap(PZERO,
  728                                                     (int)nd->nd_repstat,
  729                                                     "nfs_close");
  730                                 } while ((nd->nd_repstat == NFSERR_GRACE ||
  731                                     nd->nd_repstat == NFSERR_DELAY) &&
  732                                     error == 0 && trycnt++ < 5);
  733                                 if (op->nfso_posixlock)
  734                                         do_unlock = 0;
  735                         }
  736                         nfscl_freelock(lop, 0);
  737                 }
  738                 /*
  739                  * Do a ReleaseLockOwner.
  740                  * The lock owner name nfsl_owner may be used by other opens for
  741                  * other files but the lock_owner4 name that nfsrpc_rellockown()
  742                  * puts on the wire has the file handle for this file appended
  743                  * to it, so it can be done now.
  744                  */
  745                 (void)nfsrpc_rellockown(nmp, lp, lp->nfsl_open->nfso_fh,
  746                     lp->nfsl_open->nfso_fhlen, tcred, p);
  747         }
  748 
  749         /*
  750          * There could be other Opens for different files on the same
  751          * OpenOwner, so locking is required.
  752          */
  753         NFSLOCKCLSTATE();
  754         nfscl_lockexcl(&op->nfso_own->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
  755         NFSUNLOCKCLSTATE();
  756         do {
  757                 error = nfscl_tryclose(op, tcred, nmp, p);
  758                 if (error == NFSERR_GRACE)
  759                         (void) nfs_catnap(PZERO, error, "nfs_close");
  760         } while (error == NFSERR_GRACE);
  761         NFSLOCKCLSTATE();
  762         nfscl_lockunlock(&op->nfso_own->nfsow_rwlock);
  763 
  764         LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp)
  765                 nfscl_freelockowner(lp, 0);
  766         nfscl_freeopen(op, 0);
  767         NFSUNLOCKCLSTATE();
  768         NFSFREECRED(tcred);
  769 }
  770 
  771 /*
  772  * The actual Close RPC.
  773  */
  774 int
  775 nfsrpc_closerpc(struct nfsrv_descript *nd, struct nfsmount *nmp,
  776     struct nfsclopen *op, struct ucred *cred, NFSPROC_T *p,
  777     int syscred)
  778 {
  779         u_int32_t *tl;
  780         int error;
  781 
  782         nfscl_reqstart(nd, NFSPROC_CLOSE, nmp, op->nfso_fh,
  783             op->nfso_fhlen, NULL, NULL);
  784         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
  785         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  786         if (NFSHASNFSV4N(nmp))
  787                 *tl++ = 0;
  788         else
  789                 *tl++ = op->nfso_stateid.seqid;
  790         *tl++ = op->nfso_stateid.other[0];
  791         *tl++ = op->nfso_stateid.other[1];
  792         *tl = op->nfso_stateid.other[2];
  793         if (syscred)
  794                 nd->nd_flag |= ND_USEGSSNAME;
  795         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
  796             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
  797         if (error)
  798                 return (error);
  799         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  800         if (nd->nd_repstat == 0)
  801                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  802         error = nd->nd_repstat;
  803         if (error == NFSERR_STALESTATEID)
  804                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  805 nfsmout:
  806         mbuf_freem(nd->nd_mrep);
  807         return (error);
  808 }
  809 
  810 /*
  811  * V4 Open Confirm RPC.
  812  */
  813 int
  814 nfsrpc_openconfirm(vnode_t vp, u_int8_t *nfhp, int fhlen,
  815     struct nfsclopen *op, struct ucred *cred, NFSPROC_T *p)
  816 {
  817         u_int32_t *tl;
  818         struct nfsrv_descript nfsd, *nd = &nfsd;
  819         struct nfsmount *nmp;
  820         int error;
  821 
  822         nmp = VFSTONFS(vnode_mount(vp));
  823         if (NFSHASNFSV4N(nmp))
  824                 return (0);             /* No confirmation for NFSv4.1. */
  825         nfscl_reqstart(nd, NFSPROC_OPENCONFIRM, nmp, nfhp, fhlen, NULL, NULL);
  826         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
  827         *tl++ = op->nfso_stateid.seqid;
  828         *tl++ = op->nfso_stateid.other[0];
  829         *tl++ = op->nfso_stateid.other[1];
  830         *tl++ = op->nfso_stateid.other[2];
  831         *tl = txdr_unsigned(op->nfso_own->nfsow_seqid);
  832         error = nfscl_request(nd, vp, p, cred, NULL);
  833         if (error)
  834                 return (error);
  835         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  836         if (!nd->nd_repstat) {
  837                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  838                 op->nfso_stateid.seqid = *tl++;
  839                 op->nfso_stateid.other[0] = *tl++;
  840                 op->nfso_stateid.other[1] = *tl++;
  841                 op->nfso_stateid.other[2] = *tl;
  842         }
  843         error = nd->nd_repstat;
  844         if (error == NFSERR_STALESTATEID)
  845                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  846 nfsmout:
  847         mbuf_freem(nd->nd_mrep);
  848         return (error);
  849 }
  850 
  851 /*
  852  * Do the setclientid and setclientid confirm RPCs. Called from nfs_statfs()
  853  * when a mount has just occurred and when the server replies NFSERR_EXPIRED.
  854  */
  855 int
  856 nfsrpc_setclient(struct nfsmount *nmp, struct nfsclclient *clp, int reclaim,
  857     struct ucred *cred, NFSPROC_T *p)
  858 {
  859         u_int32_t *tl;
  860         struct nfsrv_descript nfsd;
  861         struct nfsrv_descript *nd = &nfsd;
  862         nfsattrbit_t attrbits;
  863         u_int8_t *cp = NULL, *cp2, addr[INET6_ADDRSTRLEN + 9];
  864         u_short port;
  865         int error, isinet6 = 0, callblen;
  866         nfsquad_t confirm;
  867         u_int32_t lease;
  868         static u_int32_t rev = 0;
  869         struct nfsclds *dsp;
  870         struct in6_addr a6;
  871         struct nfsclsession *tsep;
  872 
  873         if (nfsboottime.tv_sec == 0)
  874                 NFSSETBOOTTIME(nfsboottime);
  875         clp->nfsc_rev = rev++;
  876         if (NFSHASNFSV4N(nmp)) {
  877                 /*
  878                  * Either there was no previous session or the
  879                  * previous session has failed, so...
  880                  * do an ExchangeID followed by the CreateSession.
  881                  */
  882                 error = nfsrpc_exchangeid(nmp, clp, &nmp->nm_sockreq,
  883                     NFSV4EXCH_USEPNFSMDS | NFSV4EXCH_USENONPNFS, &dsp, cred, p);
  884                 NFSCL_DEBUG(1, "aft exch=%d\n", error);
  885                 if (error == 0)
  886                         error = nfsrpc_createsession(nmp, &dsp->nfsclds_sess,
  887                             &nmp->nm_sockreq,
  888                             dsp->nfsclds_sess.nfsess_sequenceid, 1, cred, p);
  889                 if (error == 0) {
  890                         NFSLOCKMNT(nmp);
  891                         /*
  892                          * The old sessions cannot be safely free'd
  893                          * here, since they may still be used by
  894                          * in-progress RPCs.
  895                          */
  896                         tsep = NULL;
  897                         if (TAILQ_FIRST(&nmp->nm_sess) != NULL)
  898                                 tsep = NFSMNT_MDSSESSION(nmp);
  899                         TAILQ_INSERT_HEAD(&nmp->nm_sess, dsp,
  900                             nfsclds_list);
  901                         /*
  902                          * Wake up RPCs waiting for a slot on the
  903                          * old session. These will then fail with
  904                          * NFSERR_BADSESSION and be retried with the
  905                          * new session by nfsv4_setsequence().
  906                          * Also wakeup() processes waiting for the
  907                          * new session.
  908                          */
  909                         if (tsep != NULL)
  910                                 wakeup(&tsep->nfsess_slots);
  911                         wakeup(&nmp->nm_sess);
  912                         NFSUNLOCKMNT(nmp);
  913                 } else
  914                         nfscl_freenfsclds(dsp);
  915                 NFSCL_DEBUG(1, "aft createsess=%d\n", error);
  916                 if (error == 0 && reclaim == 0) {
  917                         error = nfsrpc_reclaimcomplete(nmp, cred, p);
  918                         NFSCL_DEBUG(1, "aft reclaimcomp=%d\n", error);
  919                         if (error == NFSERR_COMPLETEALREADY ||
  920                             error == NFSERR_NOTSUPP)
  921                                 /* Ignore this error. */
  922                                 error = 0;
  923                 }
  924                 return (error);
  925         }
  926 
  927         /*
  928          * Allocate a single session structure for NFSv4.0, because some of
  929          * the fields are used by NFSv4.0 although it doesn't do a session.
  930          */
  931         dsp = malloc(sizeof(struct nfsclds), M_NFSCLDS, M_WAITOK | M_ZERO);
  932         mtx_init(&dsp->nfsclds_mtx, "nfsds", NULL, MTX_DEF);
  933         mtx_init(&dsp->nfsclds_sess.nfsess_mtx, "nfssession", NULL, MTX_DEF);
  934         NFSLOCKMNT(nmp);
  935         TAILQ_INSERT_HEAD(&nmp->nm_sess, dsp, nfsclds_list);
  936         tsep = NFSMNT_MDSSESSION(nmp);
  937         NFSUNLOCKMNT(nmp);
  938 
  939         nfscl_reqstart(nd, NFSPROC_SETCLIENTID, nmp, NULL, 0, NULL, NULL);
  940         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  941         *tl++ = txdr_unsigned(nfsboottime.tv_sec);
  942         *tl = txdr_unsigned(clp->nfsc_rev);
  943         (void) nfsm_strtom(nd, clp->nfsc_id, clp->nfsc_idlen);
  944 
  945         /*
  946          * set up the callback address
  947          */
  948         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  949         *tl = txdr_unsigned(NFS_CALLBCKPROG);
  950         callblen = strlen(nfsv4_callbackaddr);
  951         if (callblen == 0)
  952                 cp = nfscl_getmyip(nmp, &a6, &isinet6);
  953         if (nfscl_enablecallb && nfs_numnfscbd > 0 &&
  954             (callblen > 0 || cp != NULL)) {
  955                 port = htons(nfsv4_cbport);
  956                 cp2 = (u_int8_t *)&port;
  957 #ifdef INET6
  958                 if ((callblen > 0 &&
  959                      strchr(nfsv4_callbackaddr, ':')) || isinet6) {
  960                         char ip6buf[INET6_ADDRSTRLEN], *ip6add;
  961 
  962                         (void) nfsm_strtom(nd, "tcp6", 4);
  963                         if (callblen == 0) {
  964                                 ip6_sprintf(ip6buf, (struct in6_addr *)cp);
  965                                 ip6add = ip6buf;
  966                         } else {
  967                                 ip6add = nfsv4_callbackaddr;
  968                         }
  969                         snprintf(addr, INET6_ADDRSTRLEN + 9, "%s.%d.%d",
  970                             ip6add, cp2[0], cp2[1]);
  971                 } else
  972 #endif
  973                 {
  974                         (void) nfsm_strtom(nd, "tcp", 3);
  975                         if (callblen == 0)
  976                                 snprintf(addr, INET6_ADDRSTRLEN + 9,
  977                                     "%d.%d.%d.%d.%d.%d", cp[0], cp[1],
  978                                     cp[2], cp[3], cp2[0], cp2[1]);
  979                         else
  980                                 snprintf(addr, INET6_ADDRSTRLEN + 9,
  981                                     "%s.%d.%d", nfsv4_callbackaddr,
  982                                     cp2[0], cp2[1]);
  983                 }
  984                 (void) nfsm_strtom(nd, addr, strlen(addr));
  985         } else {
  986                 (void) nfsm_strtom(nd, "tcp", 3);
  987                 (void) nfsm_strtom(nd, "0.0.0.0.0.0", 11);
  988         }
  989         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  990         *tl = txdr_unsigned(clp->nfsc_cbident);
  991         nd->nd_flag |= ND_USEGSSNAME;
  992         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
  993                 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
  994         if (error)
  995                 return (error);
  996         if (nd->nd_repstat == 0) {
  997             NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
  998             tsep->nfsess_clientid.lval[0] = *tl++;
  999             tsep->nfsess_clientid.lval[1] = *tl++;
 1000             confirm.lval[0] = *tl++;
 1001             confirm.lval[1] = *tl;
 1002             mbuf_freem(nd->nd_mrep);
 1003             nd->nd_mrep = NULL;
 1004 
 1005             /*
 1006              * and confirm it.
 1007              */
 1008             nfscl_reqstart(nd, NFSPROC_SETCLIENTIDCFRM, nmp, NULL, 0, NULL,
 1009                 NULL);
 1010             NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 1011             *tl++ = tsep->nfsess_clientid.lval[0];
 1012             *tl++ = tsep->nfsess_clientid.lval[1];
 1013             *tl++ = confirm.lval[0];
 1014             *tl = confirm.lval[1];
 1015             nd->nd_flag |= ND_USEGSSNAME;
 1016             error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p,
 1017                 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 1018             if (error)
 1019                 return (error);
 1020             mbuf_freem(nd->nd_mrep);
 1021             nd->nd_mrep = NULL;
 1022             if (nd->nd_repstat == 0) {
 1023                 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, nmp->nm_fh,
 1024                     nmp->nm_fhsize, NULL, NULL);
 1025                 NFSZERO_ATTRBIT(&attrbits);
 1026                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_LEASETIME);
 1027                 (void) nfsrv_putattrbit(nd, &attrbits);
 1028                 nd->nd_flag |= ND_USEGSSNAME;
 1029                 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p,
 1030                     cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 1031                 if (error)
 1032                     return (error);
 1033                 if (nd->nd_repstat == 0) {
 1034                     error = nfsv4_loadattr(nd, NULL, NULL, NULL, NULL, 0, NULL,
 1035                         NULL, NULL, NULL, NULL, 0, NULL, &lease, NULL, p, cred);
 1036                     if (error)
 1037                         goto nfsmout;
 1038                     clp->nfsc_renew = NFSCL_RENEW(lease);
 1039                     clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
 1040                     clp->nfsc_clientidrev++;
 1041                     if (clp->nfsc_clientidrev == 0)
 1042                         clp->nfsc_clientidrev++;
 1043                 }
 1044             }
 1045         }
 1046         error = nd->nd_repstat;
 1047 nfsmout:
 1048         mbuf_freem(nd->nd_mrep);
 1049         return (error);
 1050 }
 1051 
 1052 /*
 1053  * nfs getattr call.
 1054  */
 1055 int
 1056 nfsrpc_getattr(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 1057     struct nfsvattr *nap, void *stuff)
 1058 {
 1059         struct nfsrv_descript nfsd, *nd = &nfsd;
 1060         int error;
 1061         nfsattrbit_t attrbits;
 1062         
 1063         NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
 1064         if (nd->nd_flag & ND_NFSV4) {
 1065                 NFSGETATTR_ATTRBIT(&attrbits);
 1066                 (void) nfsrv_putattrbit(nd, &attrbits);
 1067         }
 1068         error = nfscl_request(nd, vp, p, cred, stuff);
 1069         if (error)
 1070                 return (error);
 1071         if (!nd->nd_repstat)
 1072                 error = nfsm_loadattr(nd, nap);
 1073         else
 1074                 error = nd->nd_repstat;
 1075         mbuf_freem(nd->nd_mrep);
 1076         return (error);
 1077 }
 1078 
 1079 /*
 1080  * nfs getattr call with non-vnode arguemnts.
 1081  */
 1082 int
 1083 nfsrpc_getattrnovp(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, int syscred,
 1084     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, u_int64_t *xidp,
 1085     uint32_t *leasep)
 1086 {
 1087         struct nfsrv_descript nfsd, *nd = &nfsd;
 1088         int error, vers = NFS_VER2;
 1089         nfsattrbit_t attrbits;
 1090         
 1091         nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, fhp, fhlen, NULL, NULL);
 1092         if (nd->nd_flag & ND_NFSV4) {
 1093                 vers = NFS_VER4;
 1094                 NFSGETATTR_ATTRBIT(&attrbits);
 1095                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_LEASETIME);
 1096                 (void) nfsrv_putattrbit(nd, &attrbits);
 1097         } else if (nd->nd_flag & ND_NFSV3) {
 1098                 vers = NFS_VER3;
 1099         }
 1100         if (syscred)
 1101                 nd->nd_flag |= ND_USEGSSNAME;
 1102         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 1103             NFS_PROG, vers, NULL, 1, xidp, NULL);
 1104         if (error)
 1105                 return (error);
 1106         if (nd->nd_repstat == 0) {
 1107                 if ((nd->nd_flag & ND_NFSV4) != 0)
 1108                         error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
 1109                             NULL, NULL, NULL, NULL, NULL, 0, NULL, leasep, NULL,
 1110                             NULL, NULL);
 1111                 else
 1112                         error = nfsm_loadattr(nd, nap);
 1113         } else
 1114                 error = nd->nd_repstat;
 1115         mbuf_freem(nd->nd_mrep);
 1116         return (error);
 1117 }
 1118 
 1119 /*
 1120  * Do an nfs setattr operation.
 1121  */
 1122 int
 1123 nfsrpc_setattr(vnode_t vp, struct vattr *vap, NFSACL_T *aclp,
 1124     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *rnap, int *attrflagp,
 1125     void *stuff)
 1126 {
 1127         int error, expireret = 0, openerr, retrycnt;
 1128         u_int32_t clidrev = 0, mode;
 1129         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1130         struct nfsfh *nfhp;
 1131         nfsv4stateid_t stateid;
 1132         void *lckp;
 1133 
 1134         if (nmp->nm_clp != NULL)
 1135                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 1136         if (vap != NULL && NFSATTRISSET(u_quad_t, vap, va_size))
 1137                 mode = NFSV4OPEN_ACCESSWRITE;
 1138         else
 1139                 mode = NFSV4OPEN_ACCESSREAD;
 1140         retrycnt = 0;
 1141         do {
 1142                 lckp = NULL;
 1143                 openerr = 1;
 1144                 if (NFSHASNFSV4(nmp)) {
 1145                         nfhp = VTONFS(vp)->n_fhp;
 1146                         error = nfscl_getstateid(vp, nfhp->nfh_fh,
 1147                             nfhp->nfh_len, mode, 0, cred, p, &stateid, &lckp);
 1148                         if (error && vnode_vtype(vp) == VREG &&
 1149                             (mode == NFSV4OPEN_ACCESSWRITE ||
 1150                              nfstest_openallsetattr)) {
 1151                                 /*
 1152                                  * No Open stateid, so try and open the file
 1153                                  * now.
 1154                                  */
 1155                                 if (mode == NFSV4OPEN_ACCESSWRITE)
 1156                                         openerr = nfsrpc_open(vp, FWRITE, cred,
 1157                                             p);
 1158                                 else
 1159                                         openerr = nfsrpc_open(vp, FREAD, cred,
 1160                                             p);
 1161                                 if (!openerr)
 1162                                         (void) nfscl_getstateid(vp,
 1163                                             nfhp->nfh_fh, nfhp->nfh_len,
 1164                                             mode, 0, cred, p, &stateid, &lckp);
 1165                         }
 1166                 }
 1167                 if (vap != NULL)
 1168                         error = nfsrpc_setattrrpc(vp, vap, &stateid, cred, p,
 1169                             rnap, attrflagp, stuff);
 1170                 else
 1171                         error = nfsrpc_setaclrpc(vp, cred, p, aclp, &stateid,
 1172                             stuff);
 1173                 if (error == NFSERR_OPENMODE && mode == NFSV4OPEN_ACCESSREAD) {
 1174                         NFSLOCKMNT(nmp);
 1175                         nmp->nm_state |= NFSSTA_OPENMODE;
 1176                         NFSUNLOCKMNT(nmp);
 1177                 }
 1178                 if (error == NFSERR_STALESTATEID)
 1179                         nfscl_initiate_recovery(nmp->nm_clp);
 1180                 if (lckp != NULL)
 1181                         nfscl_lockderef(lckp);
 1182                 if (!openerr)
 1183                         (void) nfsrpc_close(vp, 0, p);
 1184                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1185                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1186                     error == NFSERR_OLDSTATEID || error == NFSERR_BADSESSION) {
 1187                         (void) nfs_catnap(PZERO, error, "nfs_setattr");
 1188                 } else if ((error == NFSERR_EXPIRED ||
 1189                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1190                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1191                 }
 1192                 retrycnt++;
 1193         } while (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1194             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1195             error == NFSERR_BADSESSION ||
 1196             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1197             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1198              expireret == 0 && clidrev != 0 && retrycnt < 4) ||
 1199             (error == NFSERR_OPENMODE && mode == NFSV4OPEN_ACCESSREAD &&
 1200              retrycnt < 4));
 1201         if (error && retrycnt >= 4)
 1202                 error = EIO;
 1203         return (error);
 1204 }
 1205 
 1206 static int
 1207 nfsrpc_setattrrpc(vnode_t vp, struct vattr *vap,
 1208     nfsv4stateid_t *stateidp, struct ucred *cred, NFSPROC_T *p,
 1209     struct nfsvattr *rnap, int *attrflagp, void *stuff)
 1210 {
 1211         u_int32_t *tl;
 1212         struct nfsrv_descript nfsd, *nd = &nfsd;
 1213         int error;
 1214         nfsattrbit_t attrbits;
 1215 
 1216         *attrflagp = 0;
 1217         NFSCL_REQSTART(nd, NFSPROC_SETATTR, vp);
 1218         if (nd->nd_flag & ND_NFSV4)
 1219                 nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1220         vap->va_type = vnode_vtype(vp);
 1221         nfscl_fillsattr(nd, vap, vp, NFSSATTR_FULL, 0);
 1222         if (nd->nd_flag & ND_NFSV3) {
 1223                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1224                 *tl = newnfs_false;
 1225         } else if (nd->nd_flag & ND_NFSV4) {
 1226                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1227                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1228                 NFSGETATTR_ATTRBIT(&attrbits);
 1229                 (void) nfsrv_putattrbit(nd, &attrbits);
 1230         }
 1231         error = nfscl_request(nd, vp, p, cred, stuff);
 1232         if (error)
 1233                 return (error);
 1234         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 1235                 error = nfscl_wcc_data(nd, vp, rnap, attrflagp, NULL, stuff);
 1236         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4 && !error)
 1237                 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 1238         if (!(nd->nd_flag & ND_NFSV3) && !nd->nd_repstat && !error)
 1239                 error = nfscl_postop_attr(nd, rnap, attrflagp, stuff);
 1240         mbuf_freem(nd->nd_mrep);
 1241         if (nd->nd_repstat && !error)
 1242                 error = nd->nd_repstat;
 1243         return (error);
 1244 }
 1245 
 1246 /*
 1247  * nfs lookup rpc
 1248  */
 1249 int
 1250 nfsrpc_lookup(vnode_t dvp, char *name, int len, struct ucred *cred,
 1251     NFSPROC_T *p, struct nfsvattr *dnap, struct nfsvattr *nap,
 1252     struct nfsfh **nfhpp, int *attrflagp, int *dattrflagp, void *stuff)
 1253 {
 1254         u_int32_t *tl;
 1255         struct nfsrv_descript nfsd, *nd = &nfsd;
 1256         struct nfsmount *nmp;
 1257         struct nfsnode *np;
 1258         struct nfsfh *nfhp;
 1259         nfsattrbit_t attrbits;
 1260         int error = 0, lookupp = 0;
 1261 
 1262         *attrflagp = 0;
 1263         *dattrflagp = 0;
 1264         if (vnode_vtype(dvp) != VDIR)
 1265                 return (ENOTDIR);
 1266         nmp = VFSTONFS(vnode_mount(dvp));
 1267         if (len > NFS_MAXNAMLEN)
 1268                 return (ENAMETOOLONG);
 1269         if (NFSHASNFSV4(nmp) && len == 1 &&
 1270                 name[0] == '.') {
 1271                 /*
 1272                  * Just return the current dir's fh.
 1273                  */
 1274                 np = VTONFS(dvp);
 1275                 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) +
 1276                         np->n_fhp->nfh_len, M_NFSFH, M_WAITOK);
 1277                 nfhp->nfh_len = np->n_fhp->nfh_len;
 1278                 NFSBCOPY(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len);
 1279                 *nfhpp = nfhp;
 1280                 return (0);
 1281         }
 1282         if (NFSHASNFSV4(nmp) && len == 2 &&
 1283                 name[0] == '.' && name[1] == '.') {
 1284                 lookupp = 1;
 1285                 NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, dvp);
 1286         } else {
 1287                 NFSCL_REQSTART(nd, NFSPROC_LOOKUP, dvp);
 1288                 (void) nfsm_strtom(nd, name, len);
 1289         }
 1290         if (nd->nd_flag & ND_NFSV4) {
 1291                 NFSGETATTR_ATTRBIT(&attrbits);
 1292                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1293                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 1294                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1295                 (void) nfsrv_putattrbit(nd, &attrbits);
 1296         }
 1297         error = nfscl_request(nd, dvp, p, cred, stuff);
 1298         if (error)
 1299                 return (error);
 1300         if (nd->nd_repstat) {
 1301                 /*
 1302                  * When an NFSv4 Lookupp returns ENOENT, it means that
 1303                  * the lookup is at the root of an fs, so return this dir.
 1304                  */
 1305                 if (nd->nd_repstat == NFSERR_NOENT && lookupp) {
 1306                     np = VTONFS(dvp);
 1307                     MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) +
 1308                         np->n_fhp->nfh_len, M_NFSFH, M_WAITOK);
 1309                     nfhp->nfh_len = np->n_fhp->nfh_len;
 1310                     NFSBCOPY(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len);
 1311                     *nfhpp = nfhp;
 1312                     mbuf_freem(nd->nd_mrep);
 1313                     return (0);
 1314                 }
 1315                 if (nd->nd_flag & ND_NFSV3)
 1316                     error = nfscl_postop_attr(nd, dnap, dattrflagp, stuff);
 1317                 else if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) ==
 1318                     ND_NFSV4) {
 1319                         /* Load the directory attributes. */
 1320                         error = nfsm_loadattr(nd, dnap);
 1321                         if (error == 0)
 1322                                 *dattrflagp = 1;
 1323                 }
 1324                 goto nfsmout;
 1325         }
 1326         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 1327                 /* Load the directory attributes. */
 1328                 error = nfsm_loadattr(nd, dnap);
 1329                 if (error != 0)
 1330                         goto nfsmout;
 1331                 *dattrflagp = 1;
 1332                 /* Skip over the Lookup and GetFH operation status values. */
 1333                 NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 1334         }
 1335         error = nfsm_getfh(nd, nfhpp);
 1336         if (error)
 1337                 goto nfsmout;
 1338 
 1339         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1340         if ((nd->nd_flag & ND_NFSV3) && !error)
 1341                 error = nfscl_postop_attr(nd, dnap, dattrflagp, stuff);
 1342 nfsmout:
 1343         mbuf_freem(nd->nd_mrep);
 1344         if (!error && nd->nd_repstat)
 1345                 error = nd->nd_repstat;
 1346         return (error);
 1347 }
 1348 
 1349 /*
 1350  * Do a readlink rpc.
 1351  */
 1352 int
 1353 nfsrpc_readlink(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1354     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1355 {
 1356         u_int32_t *tl;
 1357         struct nfsrv_descript nfsd, *nd = &nfsd;
 1358         struct nfsnode *np = VTONFS(vp);
 1359         nfsattrbit_t attrbits;
 1360         int error, len, cangetattr = 1;
 1361 
 1362         *attrflagp = 0;
 1363         NFSCL_REQSTART(nd, NFSPROC_READLINK, vp);
 1364         if (nd->nd_flag & ND_NFSV4) {
 1365                 /*
 1366                  * And do a Getattr op.
 1367                  */
 1368                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1369                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1370                 NFSGETATTR_ATTRBIT(&attrbits);
 1371                 (void) nfsrv_putattrbit(nd, &attrbits);
 1372         }
 1373         error = nfscl_request(nd, vp, p, cred, stuff);
 1374         if (error)
 1375                 return (error);
 1376         if (nd->nd_flag & ND_NFSV3)
 1377                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1378         if (!nd->nd_repstat && !error) {
 1379                 NFSM_STRSIZ(len, NFS_MAXPATHLEN);
 1380                 /*
 1381                  * This seems weird to me, but must have been added to
 1382                  * FreeBSD for some reason. The only thing I can think of
 1383                  * is that there was/is some server that replies with
 1384                  * more link data than it should?
 1385                  */
 1386                 if (len == NFS_MAXPATHLEN) {
 1387                         NFSLOCKNODE(np);
 1388                         if (np->n_size > 0 && np->n_size < NFS_MAXPATHLEN) {
 1389                                 len = np->n_size;
 1390                                 cangetattr = 0;
 1391                         }
 1392                         NFSUNLOCKNODE(np);
 1393                 }
 1394                 error = nfsm_mbufuio(nd, uiop, len);
 1395                 if ((nd->nd_flag & ND_NFSV4) && !error && cangetattr)
 1396                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1397         }
 1398         if (nd->nd_repstat && !error)
 1399                 error = nd->nd_repstat;
 1400 nfsmout:
 1401         mbuf_freem(nd->nd_mrep);
 1402         return (error);
 1403 }
 1404 
 1405 /*
 1406  * Read operation.
 1407  */
 1408 int
 1409 nfsrpc_read(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1410     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1411 {
 1412         int error, expireret = 0, retrycnt;
 1413         u_int32_t clidrev = 0;
 1414         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1415         struct nfsnode *np = VTONFS(vp);
 1416         struct ucred *newcred;
 1417         struct nfsfh *nfhp = NULL;
 1418         nfsv4stateid_t stateid;
 1419         void *lckp;
 1420 
 1421         if (nmp->nm_clp != NULL)
 1422                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 1423         newcred = cred;
 1424         if (NFSHASNFSV4(nmp)) {
 1425                 nfhp = np->n_fhp;
 1426                 newcred = NFSNEWCRED(cred);
 1427         }
 1428         retrycnt = 0;
 1429         do {
 1430                 lckp = NULL;
 1431                 if (NFSHASNFSV4(nmp))
 1432                         (void)nfscl_getstateid(vp, nfhp->nfh_fh, nfhp->nfh_len,
 1433                             NFSV4OPEN_ACCESSREAD, 0, newcred, p, &stateid,
 1434                             &lckp);
 1435                 error = nfsrpc_readrpc(vp, uiop, newcred, &stateid, p, nap,
 1436                     attrflagp, stuff);
 1437                 if (error == NFSERR_OPENMODE) {
 1438                         NFSLOCKMNT(nmp);
 1439                         nmp->nm_state |= NFSSTA_OPENMODE;
 1440                         NFSUNLOCKMNT(nmp);
 1441                 }
 1442                 if (error == NFSERR_STALESTATEID)
 1443                         nfscl_initiate_recovery(nmp->nm_clp);
 1444                 if (lckp != NULL)
 1445                         nfscl_lockderef(lckp);
 1446                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1447                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1448                     error == NFSERR_OLDSTATEID || error == NFSERR_BADSESSION) {
 1449                         (void) nfs_catnap(PZERO, error, "nfs_read");
 1450                 } else if ((error == NFSERR_EXPIRED ||
 1451                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1452                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1453                 }
 1454                 retrycnt++;
 1455         } while (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1456             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1457             error == NFSERR_BADSESSION ||
 1458             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1459             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1460              expireret == 0 && clidrev != 0 && retrycnt < 4) ||
 1461             (error == NFSERR_OPENMODE && retrycnt < 4));
 1462         if (error && retrycnt >= 4)
 1463                 error = EIO;
 1464         if (NFSHASNFSV4(nmp))
 1465                 NFSFREECRED(newcred);
 1466         return (error);
 1467 }
 1468 
 1469 /*
 1470  * The actual read RPC.
 1471  */
 1472 static int
 1473 nfsrpc_readrpc(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1474     nfsv4stateid_t *stateidp, NFSPROC_T *p, struct nfsvattr *nap,
 1475     int *attrflagp, void *stuff)
 1476 {
 1477         u_int32_t *tl;
 1478         int error = 0, len, retlen, tsiz, eof = 0;
 1479         struct nfsrv_descript nfsd;
 1480         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1481         struct nfsrv_descript *nd = &nfsd;
 1482         int rsize;
 1483         off_t tmp_off;
 1484 
 1485         *attrflagp = 0;
 1486         tsiz = uio_uio_resid(uiop);
 1487         tmp_off = uiop->uio_offset + tsiz;
 1488         NFSLOCKMNT(nmp);
 1489         if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) {
 1490                 NFSUNLOCKMNT(nmp);
 1491                 return (EFBIG);
 1492         }
 1493         rsize = nmp->nm_rsize;
 1494         NFSUNLOCKMNT(nmp);
 1495         nd->nd_mrep = NULL;
 1496         while (tsiz > 0) {
 1497                 *attrflagp = 0;
 1498                 len = (tsiz > rsize) ? rsize : tsiz;
 1499                 NFSCL_REQSTART(nd, NFSPROC_READ, vp);
 1500                 if (nd->nd_flag & ND_NFSV4)
 1501                         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1502                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED * 3);
 1503                 if (nd->nd_flag & ND_NFSV2) {
 1504                         *tl++ = txdr_unsigned(uiop->uio_offset);
 1505                         *tl++ = txdr_unsigned(len);
 1506                         *tl = 0;
 1507                 } else {
 1508                         txdr_hyper(uiop->uio_offset, tl);
 1509                         *(tl + 2) = txdr_unsigned(len);
 1510                 }
 1511                 /*
 1512                  * Since I can't do a Getattr for NFSv4 for Write, there
 1513                  * doesn't seem any point in doing one here, either.
 1514                  * (See the comment in nfsrpc_writerpc() for more info.)
 1515                  */
 1516                 error = nfscl_request(nd, vp, p, cred, stuff);
 1517                 if (error)
 1518                         return (error);
 1519                 if (nd->nd_flag & ND_NFSV3) {
 1520                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1521                 } else if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV2)) {
 1522                         error = nfsm_loadattr(nd, nap);
 1523                         if (!error)
 1524                                 *attrflagp = 1;
 1525                 }
 1526                 if (nd->nd_repstat || error) {
 1527                         if (!error)
 1528                                 error = nd->nd_repstat;
 1529                         goto nfsmout;
 1530                 }
 1531                 if (nd->nd_flag & ND_NFSV3) {
 1532                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1533                         eof = fxdr_unsigned(int, *(tl + 1));
 1534                 } else if (nd->nd_flag & ND_NFSV4) {
 1535                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 1536                         eof = fxdr_unsigned(int, *tl);
 1537                 }
 1538                 NFSM_STRSIZ(retlen, len);
 1539                 error = nfsm_mbufuio(nd, uiop, retlen);
 1540                 if (error)
 1541                         goto nfsmout;
 1542                 mbuf_freem(nd->nd_mrep);
 1543                 nd->nd_mrep = NULL;
 1544                 tsiz -= retlen;
 1545                 if (!(nd->nd_flag & ND_NFSV2)) {
 1546                         if (eof || retlen == 0)
 1547                                 tsiz = 0;
 1548                 } else if (retlen < len)
 1549                         tsiz = 0;
 1550         }
 1551         return (0);
 1552 nfsmout:
 1553         if (nd->nd_mrep != NULL)
 1554                 mbuf_freem(nd->nd_mrep);
 1555         return (error);
 1556 }
 1557 
 1558 /*
 1559  * nfs write operation
 1560  * When called_from_strategy != 0, it should return EIO for an error that
 1561  * indicates recovery is in progress, so that the buffer will be left
 1562  * dirty and be written back to the server later. If it loops around,
 1563  * the recovery thread could get stuck waiting for the buffer and recovery
 1564  * will then deadlock.
 1565  */
 1566 int
 1567 nfsrpc_write(vnode_t vp, struct uio *uiop, int *iomode, int *must_commit,
 1568     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 1569     void *stuff, int called_from_strategy)
 1570 {
 1571         int error, expireret = 0, retrycnt, nostateid;
 1572         u_int32_t clidrev = 0;
 1573         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1574         struct nfsnode *np = VTONFS(vp);
 1575         struct ucred *newcred;
 1576         struct nfsfh *nfhp = NULL;
 1577         nfsv4stateid_t stateid;
 1578         void *lckp;
 1579 
 1580         *must_commit = 0;
 1581         if (nmp->nm_clp != NULL)
 1582                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 1583         newcred = cred;
 1584         if (NFSHASNFSV4(nmp)) {
 1585                 newcred = NFSNEWCRED(cred);
 1586                 nfhp = np->n_fhp;
 1587         }
 1588         retrycnt = 0;
 1589         do {
 1590                 lckp = NULL;
 1591                 nostateid = 0;
 1592                 if (NFSHASNFSV4(nmp)) {
 1593                         (void)nfscl_getstateid(vp, nfhp->nfh_fh, nfhp->nfh_len,
 1594                             NFSV4OPEN_ACCESSWRITE, 0, newcred, p, &stateid,
 1595                             &lckp);
 1596                         if (stateid.other[0] == 0 && stateid.other[1] == 0 &&
 1597                             stateid.other[2] == 0) {
 1598                                 nostateid = 1;
 1599                                 NFSCL_DEBUG(1, "stateid0 in write\n");
 1600                         }
 1601                 }
 1602 
 1603                 /*
 1604                  * If there is no stateid for NFSv4, it means this is an
 1605                  * extraneous write after close. Basically a poorly
 1606                  * implemented buffer cache. Just don't do the write.
 1607                  */
 1608                 if (nostateid)
 1609                         error = 0;
 1610                 else
 1611                         error = nfsrpc_writerpc(vp, uiop, iomode, must_commit,
 1612                             newcred, &stateid, p, nap, attrflagp, stuff);
 1613                 if (error == NFSERR_STALESTATEID)
 1614                         nfscl_initiate_recovery(nmp->nm_clp);
 1615                 if (lckp != NULL)
 1616                         nfscl_lockderef(lckp);
 1617                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1618                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1619                     error == NFSERR_OLDSTATEID || error == NFSERR_BADSESSION) {
 1620                         (void) nfs_catnap(PZERO, error, "nfs_write");
 1621                 } else if ((error == NFSERR_EXPIRED ||
 1622                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1623                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1624                 }
 1625                 retrycnt++;
 1626         } while (error == NFSERR_GRACE || error == NFSERR_DELAY ||
 1627             ((error == NFSERR_STALESTATEID || error == NFSERR_BADSESSION ||
 1628               error == NFSERR_STALEDONTRECOVER) && called_from_strategy == 0) ||
 1629             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1630             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1631              expireret == 0 && clidrev != 0 && retrycnt < 4));
 1632         if (error != 0 && (retrycnt >= 4 ||
 1633             ((error == NFSERR_STALESTATEID || error == NFSERR_BADSESSION ||
 1634               error == NFSERR_STALEDONTRECOVER) && called_from_strategy != 0)))
 1635                 error = EIO;
 1636         if (NFSHASNFSV4(nmp))
 1637                 NFSFREECRED(newcred);
 1638         return (error);
 1639 }
 1640 
 1641 /*
 1642  * The actual write RPC.
 1643  */
 1644 static int
 1645 nfsrpc_writerpc(vnode_t vp, struct uio *uiop, int *iomode,
 1646     int *must_commit, struct ucred *cred, nfsv4stateid_t *stateidp,
 1647     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1648 {
 1649         u_int32_t *tl;
 1650         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1651         struct nfsnode *np = VTONFS(vp);
 1652         int error = 0, len, tsiz, rlen, commit, committed = NFSWRITE_FILESYNC;
 1653         int wccflag = 0, wsize;
 1654         int32_t backup;
 1655         struct nfsrv_descript nfsd;
 1656         struct nfsrv_descript *nd = &nfsd;
 1657         nfsattrbit_t attrbits;
 1658         off_t tmp_off;
 1659 
 1660         KASSERT(uiop->uio_iovcnt == 1, ("nfs: writerpc iovcnt > 1"));
 1661         *attrflagp = 0;
 1662         tsiz = uio_uio_resid(uiop);
 1663         tmp_off = uiop->uio_offset + tsiz;
 1664         NFSLOCKMNT(nmp);
 1665         if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) {
 1666                 NFSUNLOCKMNT(nmp);
 1667                 return (EFBIG);
 1668         }
 1669         wsize = nmp->nm_wsize;
 1670         NFSUNLOCKMNT(nmp);
 1671         nd->nd_mrep = NULL;     /* NFSv2 sometimes does a write with */
 1672         nd->nd_repstat = 0;     /* uio_resid == 0, so the while is not done */
 1673         while (tsiz > 0) {
 1674                 *attrflagp = 0;
 1675                 len = (tsiz > wsize) ? wsize : tsiz;
 1676                 NFSCL_REQSTART(nd, NFSPROC_WRITE, vp);
 1677                 if (nd->nd_flag & ND_NFSV4) {
 1678                         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1679                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER+2*NFSX_UNSIGNED);
 1680                         txdr_hyper(uiop->uio_offset, tl);
 1681                         tl += 2;
 1682                         *tl++ = txdr_unsigned(*iomode);
 1683                         *tl = txdr_unsigned(len);
 1684                 } else if (nd->nd_flag & ND_NFSV3) {
 1685                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER+3*NFSX_UNSIGNED);
 1686                         txdr_hyper(uiop->uio_offset, tl);
 1687                         tl += 2;
 1688                         *tl++ = txdr_unsigned(len);
 1689                         *tl++ = txdr_unsigned(*iomode);
 1690                         *tl = txdr_unsigned(len);
 1691                 } else {
 1692                         u_int32_t x;
 1693 
 1694                         NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 1695                         /*
 1696                          * Not sure why someone changed this, since the
 1697                          * RFC clearly states that "beginoffset" and
 1698                          * "totalcount" are ignored, but it wouldn't
 1699                          * surprise me if there's a busted server out there.
 1700                          */
 1701                         /* Set both "begin" and "current" to non-garbage. */
 1702                         x = txdr_unsigned((u_int32_t)uiop->uio_offset);
 1703                         *tl++ = x;      /* "begin offset" */
 1704                         *tl++ = x;      /* "current offset" */
 1705                         x = txdr_unsigned(len);
 1706                         *tl++ = x;      /* total to this offset */
 1707                         *tl = x;        /* size of this write */
 1708 
 1709                 }
 1710                 nfsm_uiombuf(nd, uiop, len);
 1711                 /*
 1712                  * Although it is tempting to do a normal Getattr Op in the
 1713                  * NFSv4 compound, the result can be a nearly hung client
 1714                  * system if the Getattr asks for Owner and/or OwnerGroup.
 1715                  * It occurs when the client can't map either the Owner or
 1716                  * Owner_group name in the Getattr reply to a uid/gid. When
 1717                  * there is a cache miss, the kernel does an upcall to the
 1718                  * nfsuserd. Then, it can try and read the local /etc/passwd
 1719                  * or /etc/group file. It can then block in getnewbuf(),
 1720                  * waiting for dirty writes to be pushed to the NFS server.
 1721                  * The only reason this doesn't result in a complete
 1722                  * deadlock, is that the upcall times out and allows
 1723                  * the write to complete. However, progress is so slow
 1724                  * that it might just as well be deadlocked.
 1725                  * As such, we get the rest of the attributes, but not
 1726                  * Owner or Owner_group.
 1727                  * nb: nfscl_loadattrcache() needs to be told that these
 1728                  *     partial attributes from a write rpc are being
 1729                  *     passed in, via a argument flag.
 1730                  */
 1731                 if (nd->nd_flag & ND_NFSV4) {
 1732                         NFSWRITEGETATTR_ATTRBIT(&attrbits);
 1733                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1734                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1735                         (void) nfsrv_putattrbit(nd, &attrbits);
 1736                 }
 1737                 error = nfscl_request(nd, vp, p, cred, stuff);
 1738                 if (error)
 1739                         return (error);
 1740                 if (nd->nd_repstat) {
 1741                         /*
 1742                          * In case the rpc gets retried, roll
 1743                          * the uio fileds changed by nfsm_uiombuf()
 1744                          * back.
 1745                          */
 1746                         uiop->uio_offset -= len;
 1747                         uio_uio_resid_add(uiop, len);
 1748                         uio_iov_base_add(uiop, -len);
 1749                         uio_iov_len_add(uiop, len);
 1750                 }
 1751                 if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1752                         error = nfscl_wcc_data(nd, vp, nap, attrflagp,
 1753                             &wccflag, stuff);
 1754                         if (error)
 1755                                 goto nfsmout;
 1756                 }
 1757                 if (!nd->nd_repstat) {
 1758                         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1759                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED
 1760                                         + NFSX_VERF);
 1761                                 rlen = fxdr_unsigned(int, *tl++);
 1762                                 if (rlen == 0) {
 1763                                         error = NFSERR_IO;
 1764                                         goto nfsmout;
 1765                                 } else if (rlen < len) {
 1766                                         backup = len - rlen;
 1767                                         uio_iov_base_add(uiop, -(backup));
 1768                                         uio_iov_len_add(uiop, backup);
 1769                                         uiop->uio_offset -= backup;
 1770                                         uio_uio_resid_add(uiop, backup);
 1771                                         len = rlen;
 1772                                 }
 1773                                 commit = fxdr_unsigned(int, *tl++);
 1774 
 1775                                 /*
 1776                                  * Return the lowest commitment level
 1777                                  * obtained by any of the RPCs.
 1778                                  */
 1779                                 if (committed == NFSWRITE_FILESYNC)
 1780                                         committed = commit;
 1781                                 else if (committed == NFSWRITE_DATASYNC &&
 1782                                         commit == NFSWRITE_UNSTABLE)
 1783                                         committed = commit;
 1784                                 NFSLOCKMNT(nmp);
 1785                                 if (!NFSHASWRITEVERF(nmp)) {
 1786                                         NFSBCOPY((caddr_t)tl,
 1787                                             (caddr_t)&nmp->nm_verf[0],
 1788                                             NFSX_VERF);
 1789                                         NFSSETWRITEVERF(nmp);
 1790                                 } else if (NFSBCMP(tl, nmp->nm_verf,
 1791                                     NFSX_VERF)) {
 1792                                         *must_commit = 1;
 1793                                         NFSBCOPY(tl, nmp->nm_verf, NFSX_VERF);
 1794                                 }
 1795                                 NFSUNLOCKMNT(nmp);
 1796                         }
 1797                         if (nd->nd_flag & ND_NFSV4)
 1798                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1799                         if (nd->nd_flag & (ND_NFSV2 | ND_NFSV4)) {
 1800                                 error = nfsm_loadattr(nd, nap);
 1801                                 if (!error)
 1802                                         *attrflagp = NFS_LATTR_NOSHRINK;
 1803                         }
 1804                 } else {
 1805                         error = nd->nd_repstat;
 1806                 }
 1807                 if (error)
 1808                         goto nfsmout;
 1809                 NFSWRITERPC_SETTIME(wccflag, np, nap, (nd->nd_flag & ND_NFSV4));
 1810                 mbuf_freem(nd->nd_mrep);
 1811                 nd->nd_mrep = NULL;
 1812                 tsiz -= len;
 1813         }
 1814 nfsmout:
 1815         if (nd->nd_mrep != NULL)
 1816                 mbuf_freem(nd->nd_mrep);
 1817         *iomode = committed;
 1818         if (nd->nd_repstat && !error)
 1819                 error = nd->nd_repstat;
 1820         return (error);
 1821 }
 1822 
 1823 /*
 1824  * nfs mknod rpc
 1825  * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
 1826  * mode set to specify the file type and the size field for rdev.
 1827  */
 1828 int
 1829 nfsrpc_mknod(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1830     u_int32_t rdev, enum vtype vtyp, struct ucred *cred, NFSPROC_T *p,
 1831     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1832     int *attrflagp, int *dattrflagp, void *dstuff)
 1833 {
 1834         u_int32_t *tl;
 1835         int error = 0;
 1836         struct nfsrv_descript nfsd, *nd = &nfsd;
 1837         nfsattrbit_t attrbits;
 1838 
 1839         *nfhpp = NULL;
 1840         *attrflagp = 0;
 1841         *dattrflagp = 0;
 1842         if (namelen > NFS_MAXNAMLEN)
 1843                 return (ENAMETOOLONG);
 1844         NFSCL_REQSTART(nd, NFSPROC_MKNOD, dvp);
 1845         if (nd->nd_flag & ND_NFSV4) {
 1846                 if (vtyp == VBLK || vtyp == VCHR) {
 1847                         NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 1848                         *tl++ = vtonfsv34_type(vtyp);
 1849                         *tl++ = txdr_unsigned(NFSMAJOR(rdev));
 1850                         *tl = txdr_unsigned(NFSMINOR(rdev));
 1851                 } else {
 1852                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1853                         *tl = vtonfsv34_type(vtyp);
 1854                 }
 1855         }
 1856         (void) nfsm_strtom(nd, name, namelen);
 1857         if (nd->nd_flag & ND_NFSV3) {
 1858                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1859                 *tl = vtonfsv34_type(vtyp);
 1860         }
 1861         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 1862                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 1863         if ((nd->nd_flag & ND_NFSV3) &&
 1864             (vtyp == VCHR || vtyp == VBLK)) {
 1865                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1866                 *tl++ = txdr_unsigned(NFSMAJOR(rdev));
 1867                 *tl = txdr_unsigned(NFSMINOR(rdev));
 1868         }
 1869         if (nd->nd_flag & ND_NFSV4) {
 1870                 NFSGETATTR_ATTRBIT(&attrbits);
 1871                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1872                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 1873                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1874                 (void) nfsrv_putattrbit(nd, &attrbits);
 1875         }
 1876         if (nd->nd_flag & ND_NFSV2)
 1877                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZERDEV, rdev);
 1878         error = nfscl_request(nd, dvp, p, cred, dstuff);
 1879         if (error)
 1880                 return (error);
 1881         if (nd->nd_flag & ND_NFSV4)
 1882                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1883         if (!nd->nd_repstat) {
 1884                 if (nd->nd_flag & ND_NFSV4) {
 1885                         NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 1886                         error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 1887                         if (error)
 1888                                 goto nfsmout;
 1889                 }
 1890                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 1891                 if (error)
 1892                         goto nfsmout;
 1893         }
 1894         if (nd->nd_flag & ND_NFSV3)
 1895                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1896         if (!error && nd->nd_repstat)
 1897                 error = nd->nd_repstat;
 1898 nfsmout:
 1899         mbuf_freem(nd->nd_mrep);
 1900         return (error);
 1901 }
 1902 
 1903 /*
 1904  * nfs file create call
 1905  * Mostly just call the approriate routine. (I separated out v4, so that
 1906  * error recovery wouldn't be as difficult.)
 1907  */
 1908 int
 1909 nfsrpc_create(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1910     nfsquad_t cverf, int fmode, struct ucred *cred, NFSPROC_T *p,
 1911     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1912     int *attrflagp, int *dattrflagp, void *dstuff)
 1913 {
 1914         int error = 0, newone, expireret = 0, retrycnt, unlocked;
 1915         struct nfsclowner *owp;
 1916         struct nfscldeleg *dp;
 1917         struct nfsmount *nmp = VFSTONFS(vnode_mount(dvp));
 1918         u_int32_t clidrev;
 1919 
 1920         if (NFSHASNFSV4(nmp)) {
 1921             retrycnt = 0;
 1922             do {
 1923                 dp = NULL;
 1924                 error = nfscl_open(dvp, NULL, 0, (NFSV4OPEN_ACCESSWRITE |
 1925                     NFSV4OPEN_ACCESSREAD), 0, cred, p, &owp, NULL, &newone,
 1926                     NULL, 1);
 1927                 if (error)
 1928                         return (error);
 1929                 if (nmp->nm_clp != NULL)
 1930                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 1931                 else
 1932                         clidrev = 0;
 1933                 if (!NFSHASPNFS(nmp) || nfscl_enablecallb == 0 ||
 1934                     nfs_numnfscbd == 0 || retrycnt > 0)
 1935                         error = nfsrpc_createv4(dvp, name, namelen, vap, cverf,
 1936                           fmode, owp, &dp, cred, p, dnap, nnap, nfhpp,
 1937                           attrflagp, dattrflagp, dstuff, &unlocked);
 1938                 else
 1939                         error = nfsrpc_getcreatelayout(dvp, name, namelen, vap,
 1940                           cverf, fmode, owp, &dp, cred, p, dnap, nnap, nfhpp,
 1941                           attrflagp, dattrflagp, dstuff, &unlocked);
 1942                 /*
 1943                  * There is no need to invalidate cached attributes here,
 1944                  * since new post-delegation issue attributes are always
 1945                  * returned by nfsrpc_createv4() and these will update the
 1946                  * attribute cache.
 1947                  */
 1948                 if (dp != NULL)
 1949                         (void) nfscl_deleg(nmp->nm_mountp, owp->nfsow_clp,
 1950                             (*nfhpp)->nfh_fh, (*nfhpp)->nfh_len, cred, p, &dp);
 1951                 nfscl_ownerrelease(nmp, owp, error, newone, unlocked);
 1952                 if (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
 1953                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1954                     error == NFSERR_BADSESSION) {
 1955                         (void) nfs_catnap(PZERO, error, "nfs_open");
 1956                 } else if ((error == NFSERR_EXPIRED ||
 1957                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1958                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1959                         retrycnt++;
 1960                 }
 1961             } while (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
 1962                 error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1963                 error == NFSERR_BADSESSION ||
 1964                 ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1965                  expireret == 0 && clidrev != 0 && retrycnt < 4));
 1966             if (error && retrycnt >= 4)
 1967                     error = EIO;
 1968         } else {
 1969                 error = nfsrpc_createv23(dvp, name, namelen, vap, cverf,
 1970                     fmode, cred, p, dnap, nnap, nfhpp, attrflagp, dattrflagp,
 1971                     dstuff);
 1972         }
 1973         return (error);
 1974 }
 1975 
 1976 /*
 1977  * The create rpc for v2 and 3.
 1978  */
 1979 static int
 1980 nfsrpc_createv23(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1981     nfsquad_t cverf, int fmode, struct ucred *cred, NFSPROC_T *p,
 1982     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1983     int *attrflagp, int *dattrflagp, void *dstuff)
 1984 {
 1985         u_int32_t *tl;
 1986         int error = 0;
 1987         struct nfsrv_descript nfsd, *nd = &nfsd;
 1988 
 1989         *nfhpp = NULL;
 1990         *attrflagp = 0;
 1991         *dattrflagp = 0;
 1992         if (namelen > NFS_MAXNAMLEN)
 1993                 return (ENAMETOOLONG);
 1994         NFSCL_REQSTART(nd, NFSPROC_CREATE, dvp);
 1995         (void) nfsm_strtom(nd, name, namelen);
 1996         if (nd->nd_flag & ND_NFSV3) {
 1997                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1998                 if (fmode & O_EXCL) {
 1999                         *tl = txdr_unsigned(NFSCREATE_EXCLUSIVE);
 2000                         NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
 2001                         *tl++ = cverf.lval[0];
 2002                         *tl = cverf.lval[1];
 2003                 } else {
 2004                         *tl = txdr_unsigned(NFSCREATE_UNCHECKED);
 2005                         nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2006                 }
 2007         } else {
 2008                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZE0, 0);
 2009         }
 2010         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2011         if (error)
 2012                 return (error);
 2013         if (nd->nd_repstat == 0) {
 2014                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2015                 if (error)
 2016                         goto nfsmout;
 2017         }
 2018         if (nd->nd_flag & ND_NFSV3)
 2019                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2020         if (nd->nd_repstat != 0 && error == 0)
 2021                 error = nd->nd_repstat;
 2022 nfsmout:
 2023         mbuf_freem(nd->nd_mrep);
 2024         return (error);
 2025 }
 2026 
 2027 static int
 2028 nfsrpc_createv4(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 2029     nfsquad_t cverf, int fmode, struct nfsclowner *owp, struct nfscldeleg **dpp,
 2030     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2031     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 2032     int *dattrflagp, void *dstuff, int *unlockedp)
 2033 {
 2034         u_int32_t *tl;
 2035         int error = 0, deleg, newone, ret, acesize, limitby;
 2036         struct nfsrv_descript nfsd, *nd = &nfsd;
 2037         struct nfsclopen *op;
 2038         struct nfscldeleg *dp = NULL;
 2039         struct nfsnode *np;
 2040         struct nfsfh *nfhp;
 2041         nfsattrbit_t attrbits;
 2042         nfsv4stateid_t stateid;
 2043         u_int32_t rflags;
 2044         struct nfsmount *nmp;
 2045         struct nfsclsession *tsep;
 2046 
 2047         nmp = VFSTONFS(dvp->v_mount);
 2048         np = VTONFS(dvp);
 2049         *unlockedp = 0;
 2050         *nfhpp = NULL;
 2051         *dpp = NULL;
 2052         *attrflagp = 0;
 2053         *dattrflagp = 0;
 2054         if (namelen > NFS_MAXNAMLEN)
 2055                 return (ENAMETOOLONG);
 2056         NFSCL_REQSTART(nd, NFSPROC_CREATE, dvp);
 2057         /*
 2058          * For V4, this is actually an Open op.
 2059          */
 2060         NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 2061         *tl++ = txdr_unsigned(owp->nfsow_seqid);
 2062         *tl++ = txdr_unsigned(NFSV4OPEN_ACCESSWRITE |
 2063             NFSV4OPEN_ACCESSREAD);
 2064         *tl++ = txdr_unsigned(NFSV4OPEN_DENYNONE);
 2065         tsep = nfsmnt_mdssession(nmp);
 2066         *tl++ = tsep->nfsess_clientid.lval[0];
 2067         *tl = tsep->nfsess_clientid.lval[1];
 2068         (void) nfsm_strtom(nd, owp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
 2069         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2070         *tl++ = txdr_unsigned(NFSV4OPEN_CREATE);
 2071         if (fmode & O_EXCL) {
 2072                 if (NFSHASNFSV4N(nmp)) {
 2073                         if (NFSHASSESSPERSIST(nmp)) {
 2074                                 /* Use GUARDED for persistent sessions. */
 2075                                 *tl = txdr_unsigned(NFSCREATE_GUARDED);
 2076                                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2077                         } else {
 2078                                 /* Otherwise, use EXCLUSIVE4_1. */
 2079                                 *tl = txdr_unsigned(NFSCREATE_EXCLUSIVE41);
 2080                                 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
 2081                                 *tl++ = cverf.lval[0];
 2082                                 *tl = cverf.lval[1];
 2083                                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2084                         }
 2085                 } else {
 2086                         /* NFSv4.0 */
 2087                         *tl = txdr_unsigned(NFSCREATE_EXCLUSIVE);
 2088                         NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
 2089                         *tl++ = cverf.lval[0];
 2090                         *tl = cverf.lval[1];
 2091                 }
 2092         } else {
 2093                 *tl = txdr_unsigned(NFSCREATE_UNCHECKED);
 2094                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2095         }
 2096         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2097         *tl = txdr_unsigned(NFSV4OPEN_CLAIMNULL);
 2098         (void) nfsm_strtom(nd, name, namelen);
 2099         /* Get the new file's handle and attributes. */
 2100         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2101         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 2102         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2103         NFSGETATTR_ATTRBIT(&attrbits);
 2104         (void) nfsrv_putattrbit(nd, &attrbits);
 2105         /* Get the directory's post-op attributes. */
 2106         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2107         *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2108         (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 0);
 2109         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2110         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2111         (void) nfsrv_putattrbit(nd, &attrbits);
 2112         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2113         if (error)
 2114                 return (error);
 2115         NFSCL_INCRSEQID(owp->nfsow_seqid, nd);
 2116         if (nd->nd_repstat == 0) {
 2117                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
 2118                     6 * NFSX_UNSIGNED);
 2119                 stateid.seqid = *tl++;
 2120                 stateid.other[0] = *tl++;
 2121                 stateid.other[1] = *tl++;
 2122                 stateid.other[2] = *tl;
 2123                 rflags = fxdr_unsigned(u_int32_t, *(tl + 6));
 2124                 (void) nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 2125                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 2126                 deleg = fxdr_unsigned(int, *tl);
 2127                 if (deleg == NFSV4OPEN_DELEGATEREAD ||
 2128                     deleg == NFSV4OPEN_DELEGATEWRITE) {
 2129                         if (!(owp->nfsow_clp->nfsc_flags &
 2130                               NFSCLFLAGS_FIRSTDELEG))
 2131                                 owp->nfsow_clp->nfsc_flags |=
 2132                                   (NFSCLFLAGS_FIRSTDELEG | NFSCLFLAGS_GOTDELEG);
 2133                         MALLOC(dp, struct nfscldeleg *,
 2134                             sizeof (struct nfscldeleg) + NFSX_V4FHMAX,
 2135                             M_NFSCLDELEG, M_WAITOK);
 2136                         LIST_INIT(&dp->nfsdl_owner);
 2137                         LIST_INIT(&dp->nfsdl_lock);
 2138                         dp->nfsdl_clp = owp->nfsow_clp;
 2139                         newnfs_copyincred(cred, &dp->nfsdl_cred);
 2140                         nfscl_lockinit(&dp->nfsdl_rwlock);
 2141                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
 2142                             NFSX_UNSIGNED);
 2143                         dp->nfsdl_stateid.seqid = *tl++;
 2144                         dp->nfsdl_stateid.other[0] = *tl++;
 2145                         dp->nfsdl_stateid.other[1] = *tl++;
 2146                         dp->nfsdl_stateid.other[2] = *tl++;
 2147                         ret = fxdr_unsigned(int, *tl);
 2148                         if (deleg == NFSV4OPEN_DELEGATEWRITE) {
 2149                                 dp->nfsdl_flags = NFSCLDL_WRITE;
 2150                                 /*
 2151                                  * Indicates how much the file can grow.
 2152                                  */
 2153                                 NFSM_DISSECT(tl, u_int32_t *,
 2154                                     3 * NFSX_UNSIGNED);
 2155                                 limitby = fxdr_unsigned(int, *tl++);
 2156                                 switch (limitby) {
 2157                                 case NFSV4OPEN_LIMITSIZE:
 2158                                         dp->nfsdl_sizelimit = fxdr_hyper(tl);
 2159                                         break;
 2160                                 case NFSV4OPEN_LIMITBLOCKS:
 2161                                         dp->nfsdl_sizelimit =
 2162                                             fxdr_unsigned(u_int64_t, *tl++);
 2163                                         dp->nfsdl_sizelimit *=
 2164                                             fxdr_unsigned(u_int64_t, *tl);
 2165                                         break;
 2166                                 default:
 2167                                         error = NFSERR_BADXDR;
 2168                                         goto nfsmout;
 2169                                 }
 2170                         } else {
 2171                                 dp->nfsdl_flags = NFSCLDL_READ;
 2172                         }
 2173                         if (ret)
 2174                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
 2175                         error = nfsrv_dissectace(nd, &dp->nfsdl_ace, &ret,
 2176                             &acesize, p);
 2177                         if (error)
 2178                                 goto nfsmout;
 2179                 } else if (deleg != NFSV4OPEN_DELEGATENONE) {
 2180                         error = NFSERR_BADXDR;
 2181                         goto nfsmout;
 2182                 }
 2183                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2184                 if (error)
 2185                         goto nfsmout;
 2186                 /* Get rid of the PutFH and Getattr status values. */
 2187                 NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 2188                 /* Load the directory attributes. */
 2189                 error = nfsm_loadattr(nd, dnap);
 2190                 if (error)
 2191                         goto nfsmout;
 2192                 *dattrflagp = 1;
 2193                 if (dp != NULL && *attrflagp) {
 2194                         dp->nfsdl_change = nnap->na_filerev;
 2195                         dp->nfsdl_modtime = nnap->na_mtime;
 2196                         dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
 2197                 }
 2198                 /*
 2199                  * We can now complete the Open state.
 2200                  */
 2201                 nfhp = *nfhpp;
 2202                 if (dp != NULL) {
 2203                         dp->nfsdl_fhlen = nfhp->nfh_len;
 2204                         NFSBCOPY(nfhp->nfh_fh, dp->nfsdl_fh, nfhp->nfh_len);
 2205                 }
 2206                 /*
 2207                  * Get an Open structure that will be
 2208                  * attached to the OpenOwner, acquired already.
 2209                  */
 2210                 error = nfscl_open(dvp, nfhp->nfh_fh, nfhp->nfh_len, 
 2211                     (NFSV4OPEN_ACCESSWRITE | NFSV4OPEN_ACCESSREAD), 0,
 2212                     cred, p, NULL, &op, &newone, NULL, 0);
 2213                 if (error)
 2214                         goto nfsmout;
 2215                 op->nfso_stateid = stateid;
 2216                 newnfs_copyincred(cred, &op->nfso_cred);
 2217                 if ((rflags & NFSV4OPEN_RESULTCONFIRM)) {
 2218                     do {
 2219                         ret = nfsrpc_openconfirm(dvp, nfhp->nfh_fh,
 2220                             nfhp->nfh_len, op, cred, p);
 2221                         if (ret == NFSERR_DELAY)
 2222                             (void) nfs_catnap(PZERO, ret, "nfs_create");
 2223                     } while (ret == NFSERR_DELAY);
 2224                     error = ret;
 2225                 }
 2226 
 2227                 /*
 2228                  * If the server is handing out delegations, but we didn't
 2229                  * get one because an OpenConfirm was required, try the
 2230                  * Open again, to get a delegation. This is a harmless no-op,
 2231                  * from a server's point of view.
 2232                  */
 2233                 if ((rflags & NFSV4OPEN_RESULTCONFIRM) &&
 2234                     (owp->nfsow_clp->nfsc_flags & NFSCLFLAGS_GOTDELEG) &&
 2235                     !error && dp == NULL) {
 2236                     do {
 2237                         ret = nfsrpc_openrpc(VFSTONFS(vnode_mount(dvp)), dvp,
 2238                             np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
 2239                             nfhp->nfh_fh, nfhp->nfh_len,
 2240                             (NFSV4OPEN_ACCESSWRITE | NFSV4OPEN_ACCESSREAD), op,
 2241                             name, namelen, &dp, 0, 0x0, cred, p, 0, 1);
 2242                         if (ret == NFSERR_DELAY)
 2243                             (void) nfs_catnap(PZERO, ret, "nfs_crt2");
 2244                     } while (ret == NFSERR_DELAY);
 2245                     if (ret) {
 2246                         if (dp != NULL) {
 2247                                 FREE((caddr_t)dp, M_NFSCLDELEG);
 2248                                 dp = NULL;
 2249                         }
 2250                         if (ret == NFSERR_STALECLIENTID ||
 2251                             ret == NFSERR_STALEDONTRECOVER ||
 2252                             ret == NFSERR_BADSESSION)
 2253                                 error = ret;
 2254                     }
 2255                 }
 2256                 nfscl_openrelease(nmp, op, error, newone);
 2257                 *unlockedp = 1;
 2258         }
 2259         if (nd->nd_repstat != 0 && error == 0)
 2260                 error = nd->nd_repstat;
 2261         if (error == NFSERR_STALECLIENTID)
 2262                 nfscl_initiate_recovery(owp->nfsow_clp);
 2263 nfsmout:
 2264         if (!error)
 2265                 *dpp = dp;
 2266         else if (dp != NULL)
 2267                 FREE((caddr_t)dp, M_NFSCLDELEG);
 2268         mbuf_freem(nd->nd_mrep);
 2269         return (error);
 2270 }
 2271 
 2272 /*
 2273  * Nfs remove rpc
 2274  */
 2275 int
 2276 nfsrpc_remove(vnode_t dvp, char *name, int namelen, vnode_t vp,
 2277     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap, int *dattrflagp,
 2278     void *dstuff)
 2279 {
 2280         u_int32_t *tl;
 2281         struct nfsrv_descript nfsd, *nd = &nfsd;
 2282         struct nfsnode *np;
 2283         struct nfsmount *nmp;
 2284         nfsv4stateid_t dstateid;
 2285         int error, ret = 0, i;
 2286 
 2287         *dattrflagp = 0;
 2288         if (namelen > NFS_MAXNAMLEN)
 2289                 return (ENAMETOOLONG);
 2290         nmp = VFSTONFS(vnode_mount(dvp));
 2291 tryagain:
 2292         if (NFSHASNFSV4(nmp) && ret == 0) {
 2293                 ret = nfscl_removedeleg(vp, p, &dstateid);
 2294                 if (ret == 1) {
 2295                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGREMOVE, vp);
 2296                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID +
 2297                             NFSX_UNSIGNED);
 2298                         if (NFSHASNFSV4N(nmp))
 2299                                 *tl++ = 0;
 2300                         else
 2301                                 *tl++ = dstateid.seqid;
 2302                         *tl++ = dstateid.other[0];
 2303                         *tl++ = dstateid.other[1];
 2304                         *tl++ = dstateid.other[2];
 2305                         *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2306                         np = VTONFS(dvp);
 2307                         (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2308                             np->n_fhp->nfh_len, 0);
 2309                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2310                         *tl = txdr_unsigned(NFSV4OP_REMOVE);
 2311                 }
 2312         } else {
 2313                 ret = 0;
 2314         }
 2315         if (ret == 0)
 2316                 NFSCL_REQSTART(nd, NFSPROC_REMOVE, dvp);
 2317         (void) nfsm_strtom(nd, name, namelen);
 2318         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2319         if (error)
 2320                 return (error);
 2321         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 2322                 /* For NFSv4, parse out any Delereturn replies. */
 2323                 if (ret > 0 && nd->nd_repstat != 0 &&
 2324                     (nd->nd_flag & ND_NOMOREDATA)) {
 2325                         /*
 2326                          * If the Delegreturn failed, try again without
 2327                          * it. The server will Recall, as required.
 2328                          */
 2329                         mbuf_freem(nd->nd_mrep);
 2330                         goto tryagain;
 2331                 }
 2332                 for (i = 0; i < (ret * 2); i++) {
 2333                         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) ==
 2334                             ND_NFSV4) {
 2335                             NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2336                             if (*(tl + 1))
 2337                                 nd->nd_flag |= ND_NOMOREDATA;
 2338                         }
 2339                 }
 2340                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2341         }
 2342         if (nd->nd_repstat && !error)
 2343                 error = nd->nd_repstat;
 2344 nfsmout:
 2345         mbuf_freem(nd->nd_mrep);
 2346         return (error);
 2347 }
 2348 
 2349 /*
 2350  * Do an nfs rename rpc.
 2351  */
 2352 int
 2353 nfsrpc_rename(vnode_t fdvp, vnode_t fvp, char *fnameptr, int fnamelen,
 2354     vnode_t tdvp, vnode_t tvp, char *tnameptr, int tnamelen, struct ucred *cred,
 2355     NFSPROC_T *p, struct nfsvattr *fnap, struct nfsvattr *tnap,
 2356     int *fattrflagp, int *tattrflagp, void *fstuff, void *tstuff)
 2357 {
 2358         u_int32_t *tl;
 2359         struct nfsrv_descript nfsd, *nd = &nfsd;
 2360         struct nfsmount *nmp;
 2361         struct nfsnode *np;
 2362         nfsattrbit_t attrbits;
 2363         nfsv4stateid_t fdstateid, tdstateid;
 2364         int error = 0, ret = 0, gottd = 0, gotfd = 0, i;
 2365         
 2366         *fattrflagp = 0;
 2367         *tattrflagp = 0;
 2368         nmp = VFSTONFS(vnode_mount(fdvp));
 2369         if (fnamelen > NFS_MAXNAMLEN || tnamelen > NFS_MAXNAMLEN)
 2370                 return (ENAMETOOLONG);
 2371 tryagain:
 2372         if (NFSHASNFSV4(nmp) && ret == 0) {
 2373                 ret = nfscl_renamedeleg(fvp, &fdstateid, &gotfd, tvp,
 2374                     &tdstateid, &gottd, p);
 2375                 if (gotfd && gottd) {
 2376                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME2, fvp);
 2377                 } else if (gotfd) {
 2378                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME1, fvp);
 2379                 } else if (gottd) {
 2380                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME1, tvp);
 2381                 }
 2382                 if (gotfd) {
 2383                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 2384                         if (NFSHASNFSV4N(nmp))
 2385                                 *tl++ = 0;
 2386                         else
 2387                                 *tl++ = fdstateid.seqid;
 2388                         *tl++ = fdstateid.other[0];
 2389                         *tl++ = fdstateid.other[1];
 2390                         *tl = fdstateid.other[2];
 2391                         if (gottd) {
 2392                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2393                                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2394                                 np = VTONFS(tvp);
 2395                                 (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2396                                     np->n_fhp->nfh_len, 0);
 2397                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2398                                 *tl = txdr_unsigned(NFSV4OP_DELEGRETURN);
 2399                         }
 2400                 }
 2401                 if (gottd) {
 2402                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 2403                         if (NFSHASNFSV4N(nmp))
 2404                                 *tl++ = 0;
 2405                         else
 2406                                 *tl++ = tdstateid.seqid;
 2407                         *tl++ = tdstateid.other[0];
 2408                         *tl++ = tdstateid.other[1];
 2409                         *tl = tdstateid.other[2];
 2410                 }
 2411                 if (ret > 0) {
 2412                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2413                         *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2414                         np = VTONFS(fdvp);
 2415                         (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2416                             np->n_fhp->nfh_len, 0);
 2417                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2418                         *tl = txdr_unsigned(NFSV4OP_SAVEFH);
 2419                 }
 2420         } else {
 2421                 ret = 0;
 2422         }
 2423         if (ret == 0)
 2424                 NFSCL_REQSTART(nd, NFSPROC_RENAME, fdvp);
 2425         if (nd->nd_flag & ND_NFSV4) {
 2426                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2427                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2428                 NFSWCCATTR_ATTRBIT(&attrbits);
 2429                 (void) nfsrv_putattrbit(nd, &attrbits);
 2430                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2431                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2432                 (void) nfsm_fhtom(nd, VTONFS(tdvp)->n_fhp->nfh_fh,
 2433                     VTONFS(tdvp)->n_fhp->nfh_len, 0);
 2434                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2435                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2436                 (void) nfsrv_putattrbit(nd, &attrbits);
 2437                 nd->nd_flag |= ND_V4WCCATTR;
 2438                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2439                 *tl = txdr_unsigned(NFSV4OP_RENAME);
 2440         }
 2441         (void) nfsm_strtom(nd, fnameptr, fnamelen);
 2442         if (!(nd->nd_flag & ND_NFSV4))
 2443                 (void) nfsm_fhtom(nd, VTONFS(tdvp)->n_fhp->nfh_fh,
 2444                         VTONFS(tdvp)->n_fhp->nfh_len, 0);
 2445         (void) nfsm_strtom(nd, tnameptr, tnamelen);
 2446         error = nfscl_request(nd, fdvp, p, cred, fstuff);
 2447         if (error)
 2448                 return (error);
 2449         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 2450                 /* For NFSv4, parse out any Delereturn replies. */
 2451                 if (ret > 0 && nd->nd_repstat != 0 &&
 2452                     (nd->nd_flag & ND_NOMOREDATA)) {
 2453                         /*
 2454                          * If the Delegreturn failed, try again without
 2455                          * it. The server will Recall, as required.
 2456                          */
 2457                         mbuf_freem(nd->nd_mrep);
 2458                         goto tryagain;
 2459                 }
 2460                 for (i = 0; i < (ret * 2); i++) {
 2461                         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) ==
 2462                             ND_NFSV4) {
 2463                             NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2464                             if (*(tl + 1)) {
 2465                                 if (i == 0 && ret > 1) {
 2466                                     /*
 2467                                      * If the Delegreturn failed, try again
 2468                                      * without it. The server will Recall, as
 2469                                      * required.
 2470                                      * If ret > 1, the first iteration of this
 2471                                      * loop is the second DelegReturn result.
 2472                                      */
 2473                                     mbuf_freem(nd->nd_mrep);
 2474                                     goto tryagain;
 2475                                 } else {
 2476                                     nd->nd_flag |= ND_NOMOREDATA;
 2477                                 }
 2478                             }
 2479                         }
 2480                 }
 2481                 /* Now, the first wcc attribute reply. */
 2482                 if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 2483                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2484                         if (*(tl + 1))
 2485                                 nd->nd_flag |= ND_NOMOREDATA;
 2486                 }
 2487                 error = nfscl_wcc_data(nd, fdvp, fnap, fattrflagp, NULL,
 2488                     fstuff);
 2489                 /* and the second wcc attribute reply. */
 2490                 if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4 &&
 2491                     !error) {
 2492                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2493                         if (*(tl + 1))
 2494                                 nd->nd_flag |= ND_NOMOREDATA;
 2495                 }
 2496                 if (!error)
 2497                         error = nfscl_wcc_data(nd, tdvp, tnap, tattrflagp,
 2498                             NULL, tstuff);
 2499         }
 2500         if (nd->nd_repstat && !error)
 2501                 error = nd->nd_repstat;
 2502 nfsmout:
 2503         mbuf_freem(nd->nd_mrep);
 2504         return (error);
 2505 }
 2506 
 2507 /*
 2508  * nfs hard link create rpc
 2509  */
 2510 int
 2511 nfsrpc_link(vnode_t dvp, vnode_t vp, char *name, int namelen,
 2512     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2513     struct nfsvattr *nap, int *attrflagp, int *dattrflagp, void *dstuff)
 2514 {
 2515         u_int32_t *tl;
 2516         struct nfsrv_descript nfsd, *nd = &nfsd;
 2517         nfsattrbit_t attrbits;
 2518         int error = 0;
 2519 
 2520         *attrflagp = 0;
 2521         *dattrflagp = 0;
 2522         if (namelen > NFS_MAXNAMLEN)
 2523                 return (ENAMETOOLONG);
 2524         NFSCL_REQSTART(nd, NFSPROC_LINK, vp);
 2525         if (nd->nd_flag & ND_NFSV4) {
 2526                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2527                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2528         }
 2529         (void) nfsm_fhtom(nd, VTONFS(dvp)->n_fhp->nfh_fh,
 2530                 VTONFS(dvp)->n_fhp->nfh_len, 0);
 2531         if (nd->nd_flag & ND_NFSV4) {
 2532                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2533                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2534                 NFSWCCATTR_ATTRBIT(&attrbits);
 2535                 (void) nfsrv_putattrbit(nd, &attrbits);
 2536                 nd->nd_flag |= ND_V4WCCATTR;
 2537                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2538                 *tl = txdr_unsigned(NFSV4OP_LINK);
 2539         }
 2540         (void) nfsm_strtom(nd, name, namelen);
 2541         error = nfscl_request(nd, vp, p, cred, dstuff);
 2542         if (error)
 2543                 return (error);
 2544         if (nd->nd_flag & ND_NFSV3) {
 2545                 error = nfscl_postop_attr(nd, nap, attrflagp, dstuff);
 2546                 if (!error)
 2547                         error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp,
 2548                             NULL, dstuff);
 2549         } else if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 2550                 /*
 2551                  * First, parse out the PutFH and Getattr result.
 2552                  */
 2553                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2554                 if (!(*(tl + 1)))
 2555                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2556                 if (*(tl + 1))
 2557                         nd->nd_flag |= ND_NOMOREDATA;
 2558                 /*
 2559                  * Get the pre-op attributes.
 2560                  */
 2561                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2562         }
 2563         if (nd->nd_repstat && !error)
 2564                 error = nd->nd_repstat;
 2565 nfsmout:
 2566         mbuf_freem(nd->nd_mrep);
 2567         return (error);
 2568 }
 2569 
 2570 /*
 2571  * nfs symbolic link create rpc
 2572  */
 2573 int
 2574 nfsrpc_symlink(vnode_t dvp, char *name, int namelen, char *target,
 2575     struct vattr *vap, struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2576     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 2577     int *dattrflagp, void *dstuff)
 2578 {
 2579         u_int32_t *tl;
 2580         struct nfsrv_descript nfsd, *nd = &nfsd;
 2581         struct nfsmount *nmp;
 2582         int slen, error = 0;
 2583 
 2584         *nfhpp = NULL;
 2585         *attrflagp = 0;
 2586         *dattrflagp = 0;
 2587         nmp = VFSTONFS(vnode_mount(dvp));
 2588         slen = strlen(target);
 2589         if (slen > NFS_MAXPATHLEN || namelen > NFS_MAXNAMLEN)
 2590                 return (ENAMETOOLONG);
 2591         NFSCL_REQSTART(nd, NFSPROC_SYMLINK, dvp);
 2592         if (nd->nd_flag & ND_NFSV4) {
 2593                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2594                 *tl = txdr_unsigned(NFLNK);
 2595                 (void) nfsm_strtom(nd, target, slen);
 2596         }
 2597         (void) nfsm_strtom(nd, name, namelen);
 2598         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 2599                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2600         if (!(nd->nd_flag & ND_NFSV4))
 2601                 (void) nfsm_strtom(nd, target, slen);
 2602         if (nd->nd_flag & ND_NFSV2)
 2603                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZENEG1, 0);
 2604         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2605         if (error)
 2606                 return (error);
 2607         if (nd->nd_flag & ND_NFSV4)
 2608                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2609         if ((nd->nd_flag & ND_NFSV3) && !error) {
 2610                 if (!nd->nd_repstat)
 2611                         error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2612                 if (!error)
 2613                         error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp,
 2614                             NULL, dstuff);
 2615         }
 2616         if (nd->nd_repstat && !error)
 2617                 error = nd->nd_repstat;
 2618         mbuf_freem(nd->nd_mrep);
 2619         /*
 2620          * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
 2621          * Only do this if vfs.nfs.ignore_eexist is set.
 2622          * Never do this for NFSv4.1 or later minor versions, since sessions
 2623          * should guarantee "exactly once" RPC semantics.
 2624          */
 2625         if (error == EEXIST && nfsignore_eexist != 0 && (!NFSHASNFSV4(nmp) ||
 2626             nmp->nm_minorvers == 0))
 2627                 error = 0;
 2628         return (error);
 2629 }
 2630 
 2631 /*
 2632  * nfs make dir rpc
 2633  */
 2634 int
 2635 nfsrpc_mkdir(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 2636     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2637     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 2638     int *dattrflagp, void *dstuff)
 2639 {
 2640         u_int32_t *tl;
 2641         struct nfsrv_descript nfsd, *nd = &nfsd;
 2642         nfsattrbit_t attrbits;
 2643         int error = 0;
 2644         struct nfsfh *fhp;
 2645         struct nfsmount *nmp;
 2646 
 2647         *nfhpp = NULL;
 2648         *attrflagp = 0;
 2649         *dattrflagp = 0;
 2650         nmp = VFSTONFS(vnode_mount(dvp));
 2651         fhp = VTONFS(dvp)->n_fhp;
 2652         if (namelen > NFS_MAXNAMLEN)
 2653                 return (ENAMETOOLONG);
 2654         NFSCL_REQSTART(nd, NFSPROC_MKDIR, dvp);
 2655         if (nd->nd_flag & ND_NFSV4) {
 2656                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2657                 *tl = txdr_unsigned(NFDIR);
 2658         }
 2659         (void) nfsm_strtom(nd, name, namelen);
 2660         nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZENEG1, 0);
 2661         if (nd->nd_flag & ND_NFSV4) {
 2662                 NFSGETATTR_ATTRBIT(&attrbits);
 2663                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2664                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 2665                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2666                 (void) nfsrv_putattrbit(nd, &attrbits);
 2667                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2668                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2669                 (void) nfsm_fhtom(nd, fhp->nfh_fh, fhp->nfh_len, 0);
 2670                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2671                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2672                 (void) nfsrv_putattrbit(nd, &attrbits);
 2673         }
 2674         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2675         if (error)
 2676                 return (error);
 2677         if (nd->nd_flag & ND_NFSV4)
 2678                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2679         if (!nd->nd_repstat && !error) {
 2680                 if (nd->nd_flag & ND_NFSV4) {
 2681                         NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 2682                         error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 2683                 }
 2684                 if (!error)
 2685                         error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2686                 if (error == 0 && (nd->nd_flag & ND_NFSV4) != 0) {
 2687                         /* Get rid of the PutFH and Getattr status values. */
 2688                         NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 2689                         /* Load the directory attributes. */
 2690                         error = nfsm_loadattr(nd, dnap);
 2691                         if (error == 0)
 2692                                 *dattrflagp = 1;
 2693                 }
 2694         }
 2695         if ((nd->nd_flag & ND_NFSV3) && !error)
 2696                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2697         if (nd->nd_repstat && !error)
 2698                 error = nd->nd_repstat;
 2699 nfsmout:
 2700         mbuf_freem(nd->nd_mrep);
 2701         /*
 2702          * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
 2703          * Only do this if vfs.nfs.ignore_eexist is set.
 2704          * Never do this for NFSv4.1 or later minor versions, since sessions
 2705          * should guarantee "exactly once" RPC semantics.
 2706          */
 2707         if (error == EEXIST && nfsignore_eexist != 0 && (!NFSHASNFSV4(nmp) ||
 2708             nmp->nm_minorvers == 0))
 2709                 error = 0;
 2710         return (error);
 2711 }
 2712 
 2713 /*
 2714  * nfs remove directory call
 2715  */
 2716 int
 2717 nfsrpc_rmdir(vnode_t dvp, char *name, int namelen, struct ucred *cred,
 2718     NFSPROC_T *p, struct nfsvattr *dnap, int *dattrflagp, void *dstuff)
 2719 {
 2720         struct nfsrv_descript nfsd, *nd = &nfsd;
 2721         int error = 0;
 2722 
 2723         *dattrflagp = 0;
 2724         if (namelen > NFS_MAXNAMLEN)
 2725                 return (ENAMETOOLONG);
 2726         NFSCL_REQSTART(nd, NFSPROC_RMDIR, dvp);
 2727         (void) nfsm_strtom(nd, name, namelen);
 2728         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2729         if (error)
 2730                 return (error);
 2731         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 2732                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2733         if (nd->nd_repstat && !error)
 2734                 error = nd->nd_repstat;
 2735         mbuf_freem(nd->nd_mrep);
 2736         /*
 2737          * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
 2738          */
 2739         if (error == ENOENT)
 2740                 error = 0;
 2741         return (error);
 2742 }
 2743 
 2744 /*
 2745  * Readdir rpc.
 2746  * Always returns with either uio_resid unchanged, if you are at the
 2747  * end of the directory, or uio_resid == 0, with all DIRBLKSIZ chunks
 2748  * filled in.
 2749  * I felt this would allow caching of directory blocks more easily
 2750  * than returning a pertially filled block.
 2751  * Directory offset cookies:
 2752  * Oh my, what to do with them...
 2753  * I can think of three ways to deal with them:
 2754  * 1 - have the layer above these RPCs maintain a map between logical
 2755  *     directory byte offsets and the NFS directory offset cookies
 2756  * 2 - pass the opaque directory offset cookies up into userland
 2757  *     and let the libc functions deal with them, via the system call
 2758  * 3 - return them to userland in the "struct dirent", so future versions
 2759  *     of libc can use them and do whatever is necessary to make things work
 2760  *     above these rpc calls, in the meantime
 2761  * For now, I do #3 by "hiding" the directory offset cookies after the
 2762  * d_name field in struct dirent. This is space inside d_reclen that
 2763  * will be ignored by anything that doesn't know about them.
 2764  * The directory offset cookies are filled in as the last 8 bytes of
 2765  * each directory entry, after d_name. Someday, the userland libc
 2766  * functions may be able to use these. In the meantime, it satisfies
 2767  * OpenBSD's requirements for cookies being returned.
 2768  * If expects the directory offset cookie for the read to be in uio_offset
 2769  * and returns the one for the next entry after this directory block in
 2770  * there, as well.
 2771  */
 2772 int
 2773 nfsrpc_readdir(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
 2774     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 2775     int *eofp, void *stuff)
 2776 {
 2777         int len, left;
 2778         struct dirent *dp = NULL;
 2779         u_int32_t *tl;
 2780         nfsquad_t cookie, ncookie;
 2781         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 2782         struct nfsnode *dnp = VTONFS(vp);
 2783         struct nfsvattr nfsva;
 2784         struct nfsrv_descript nfsd, *nd = &nfsd;
 2785         int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
 2786         int reqsize, tryformoredirs = 1, readsize, eof = 0, gotmnton = 0;
 2787         long dotfileid, dotdotfileid = 0;
 2788         u_int32_t fakefileno = 0xffffffff, rderr;
 2789         char *cp;
 2790         nfsattrbit_t attrbits, dattrbits;
 2791         u_int32_t *tl2 = NULL;
 2792         size_t tresid;
 2793 
 2794         KASSERT(uiop->uio_iovcnt == 1 &&
 2795             (uio_uio_resid(uiop) & (DIRBLKSIZ - 1)) == 0,
 2796             ("nfs readdirrpc bad uio"));
 2797 
 2798         /*
 2799          * There is no point in reading a lot more than uio_resid, however
 2800          * adding one additional DIRBLKSIZ makes sense. Since uio_resid
 2801          * and nm_readdirsize are both exact multiples of DIRBLKSIZ, this
 2802          * will never make readsize > nm_readdirsize.
 2803          */
 2804         readsize = nmp->nm_readdirsize;
 2805         if (readsize > uio_uio_resid(uiop))
 2806                 readsize = uio_uio_resid(uiop) + DIRBLKSIZ;
 2807 
 2808         *attrflagp = 0;
 2809         if (eofp)
 2810                 *eofp = 0;
 2811         tresid = uio_uio_resid(uiop);
 2812         cookie.lval[0] = cookiep->nfsuquad[0];
 2813         cookie.lval[1] = cookiep->nfsuquad[1];
 2814         nd->nd_mrep = NULL;
 2815 
 2816         /*
 2817          * For NFSv4, first create the "." and ".." entries.
 2818          */
 2819         if (NFSHASNFSV4(nmp)) {
 2820                 reqsize = 6 * NFSX_UNSIGNED;
 2821                 NFSGETATTR_ATTRBIT(&dattrbits);
 2822                 NFSZERO_ATTRBIT(&attrbits);
 2823                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FILEID);
 2824                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TYPE);
 2825                 if (NFSISSET_ATTRBIT(&dnp->n_vattr.na_suppattr,
 2826                     NFSATTRBIT_MOUNTEDONFILEID)) {
 2827                         NFSSETBIT_ATTRBIT(&attrbits,
 2828                             NFSATTRBIT_MOUNTEDONFILEID);
 2829                         gotmnton = 1;
 2830                 } else {
 2831                         /*
 2832                          * Must fake it. Use the fileno, except when the
 2833                          * fsid is != to that of the directory. For that
 2834                          * case, generate a fake fileno that is not the same.
 2835                          */
 2836                         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FSID);
 2837                         gotmnton = 0;
 2838                 }
 2839 
 2840                 /*
 2841                  * Joy, oh joy. For V4 we get to hand craft '.' and '..'.
 2842                  */
 2843                 if (uiop->uio_offset == 0) {
 2844                         NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, vp);
 2845                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2846                         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 2847                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2848                         (void) nfsrv_putattrbit(nd, &attrbits);
 2849                         error = nfscl_request(nd, vp, p, cred, stuff);
 2850                         if (error)
 2851                             return (error);
 2852                         dotfileid = 0;  /* Fake out the compiler. */
 2853                         if ((nd->nd_flag & ND_NOMOREDATA) == 0) {
 2854                             error = nfsm_loadattr(nd, &nfsva);
 2855                             if (error != 0)
 2856                                 goto nfsmout;
 2857                             dotfileid = nfsva.na_fileid;
 2858                         }
 2859                         if (nd->nd_repstat == 0) {
 2860                             NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 2861                             len = fxdr_unsigned(int, *(tl + 4));
 2862                             if (len > 0 && len <= NFSX_V4FHMAX)
 2863                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 2864                             else
 2865                                 error = EPERM;
 2866                             if (!error) {
 2867                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 2868                                 nfsva.na_mntonfileno = 0xffffffff;
 2869                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 2870                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 2871                                     NULL, NULL, NULL, p, cred);
 2872                                 if (error) {
 2873                                     dotdotfileid = dotfileid;
 2874                                 } else if (gotmnton) {
 2875                                     if (nfsva.na_mntonfileno != 0xffffffff)
 2876                                         dotdotfileid = nfsva.na_mntonfileno;
 2877                                     else
 2878                                         dotdotfileid = nfsva.na_fileid;
 2879                                 } else if (nfsva.na_filesid[0] ==
 2880                                     dnp->n_vattr.na_filesid[0] &&
 2881                                     nfsva.na_filesid[1] ==
 2882                                     dnp->n_vattr.na_filesid[1]) {
 2883                                     dotdotfileid = nfsva.na_fileid;
 2884                                 } else {
 2885                                     do {
 2886                                         fakefileno--;
 2887                                     } while (fakefileno ==
 2888                                         nfsva.na_fileid);
 2889                                     dotdotfileid = fakefileno;
 2890                                 }
 2891                             }
 2892                         } else if (nd->nd_repstat == NFSERR_NOENT) {
 2893                             /*
 2894                              * Lookupp returns NFSERR_NOENT when we are
 2895                              * at the root, so just use the current dir.
 2896                              */
 2897                             nd->nd_repstat = 0;
 2898                             dotdotfileid = dotfileid;
 2899                         } else {
 2900                             error = nd->nd_repstat;
 2901                         }
 2902                         mbuf_freem(nd->nd_mrep);
 2903                         if (error)
 2904                             return (error);
 2905                         nd->nd_mrep = NULL;
 2906                         dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2907                         dp->d_type = DT_DIR;
 2908                         dp->d_fileno = dotfileid;
 2909                         dp->d_namlen = 1;
 2910                         dp->d_name[0] = '.';
 2911                         dp->d_name[1] = '\0';
 2912                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 2913                         /*
 2914                          * Just make these offset cookie 0.
 2915                          */
 2916                         tl = (u_int32_t *)&dp->d_name[4];
 2917                         *tl++ = 0;
 2918                         *tl = 0;
 2919                         blksiz += dp->d_reclen;
 2920                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 2921                         uiop->uio_offset += dp->d_reclen;
 2922                         uio_iov_base_add(uiop, dp->d_reclen);
 2923                         uio_iov_len_add(uiop, -(dp->d_reclen));
 2924                         dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2925                         dp->d_type = DT_DIR;
 2926                         dp->d_fileno = dotdotfileid;
 2927                         dp->d_namlen = 2;
 2928                         dp->d_name[0] = '.';
 2929                         dp->d_name[1] = '.';
 2930                         dp->d_name[2] = '\0';
 2931                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 2932                         /*
 2933                          * Just make these offset cookie 0.
 2934                          */
 2935                         tl = (u_int32_t *)&dp->d_name[4];
 2936                         *tl++ = 0;
 2937                         *tl = 0;
 2938                         blksiz += dp->d_reclen;
 2939                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 2940                         uiop->uio_offset += dp->d_reclen;
 2941                         uio_iov_base_add(uiop, dp->d_reclen);
 2942                         uio_iov_len_add(uiop, -(dp->d_reclen));
 2943                 }
 2944                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_RDATTRERROR);
 2945         } else {
 2946                 reqsize = 5 * NFSX_UNSIGNED;
 2947         }
 2948 
 2949 
 2950         /*
 2951          * Loop around doing readdir rpc's of size readsize.
 2952          * The stopping criteria is EOF or buffer full.
 2953          */
 2954         while (more_dirs && bigenough) {
 2955                 *attrflagp = 0;
 2956                 NFSCL_REQSTART(nd, NFSPROC_READDIR, vp);
 2957                 if (nd->nd_flag & ND_NFSV2) {
 2958                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2959                         *tl++ = cookie.lval[1];
 2960                         *tl = txdr_unsigned(readsize);
 2961                 } else {
 2962                         NFSM_BUILD(tl, u_int32_t *, reqsize);
 2963                         *tl++ = cookie.lval[0];
 2964                         *tl++ = cookie.lval[1];
 2965                         if (cookie.qval == 0) {
 2966                                 *tl++ = 0;
 2967                                 *tl++ = 0;
 2968                         } else {
 2969                                 NFSLOCKNODE(dnp);
 2970                                 *tl++ = dnp->n_cookieverf.nfsuquad[0];
 2971                                 *tl++ = dnp->n_cookieverf.nfsuquad[1];
 2972                                 NFSUNLOCKNODE(dnp);
 2973                         }
 2974                         if (nd->nd_flag & ND_NFSV4) {
 2975                                 *tl++ = txdr_unsigned(readsize);
 2976                                 *tl = txdr_unsigned(readsize);
 2977                                 (void) nfsrv_putattrbit(nd, &attrbits);
 2978                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2979                                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2980                                 (void) nfsrv_putattrbit(nd, &dattrbits);
 2981                         } else {
 2982                                 *tl = txdr_unsigned(readsize);
 2983                         }
 2984                 }
 2985                 error = nfscl_request(nd, vp, p, cred, stuff);
 2986                 if (error)
 2987                         return (error);
 2988                 if (!(nd->nd_flag & ND_NFSV2)) {
 2989                         if (nd->nd_flag & ND_NFSV3)
 2990                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 2991                                     stuff);
 2992                         if (!nd->nd_repstat && !error) {
 2993                                 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
 2994                                 NFSLOCKNODE(dnp);
 2995                                 dnp->n_cookieverf.nfsuquad[0] = *tl++;
 2996                                 dnp->n_cookieverf.nfsuquad[1] = *tl;
 2997                                 NFSUNLOCKNODE(dnp);
 2998                         }
 2999                 }
 3000                 if (nd->nd_repstat || error) {
 3001                         if (!error)
 3002                                 error = nd->nd_repstat;
 3003                         goto nfsmout;
 3004                 }
 3005                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3006                 more_dirs = fxdr_unsigned(int, *tl);
 3007                 if (!more_dirs)
 3008                         tryformoredirs = 0;
 3009         
 3010                 /* loop through the dir entries, doctoring them to 4bsd form */
 3011                 while (more_dirs && bigenough) {
 3012                         if (nd->nd_flag & ND_NFSV4) {
 3013                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3014                                 ncookie.lval[0] = *tl++;
 3015                                 ncookie.lval[1] = *tl++;
 3016                                 len = fxdr_unsigned(int, *tl);
 3017                         } else if (nd->nd_flag & ND_NFSV3) {
 3018                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3019                                 nfsva.na_fileid = fxdr_hyper(tl);
 3020                                 tl += 2;
 3021                                 len = fxdr_unsigned(int, *tl);
 3022                         } else {
 3023                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 3024                                 nfsva.na_fileid =
 3025                                     fxdr_unsigned(long, *tl++);
 3026                                 len = fxdr_unsigned(int, *tl);
 3027                         }
 3028                         if (len <= 0 || len > NFS_MAXNAMLEN) {
 3029                                 error = EBADRPC;
 3030                                 goto nfsmout;
 3031                         }
 3032                         tlen = NFSM_RNDUP(len);
 3033                         if (tlen == len)
 3034                                 tlen += 4;  /* To ensure null termination */
 3035                         left = DIRBLKSIZ - blksiz;
 3036                         if ((int)(tlen + DIRHDSIZ + NFSX_HYPER) > left) {
 3037                                 NFSBZERO(uio_iov_base(uiop), left);
 3038                                 dp->d_reclen += left;
 3039                                 uio_iov_base_add(uiop, left);
 3040                                 uio_iov_len_add(uiop, -(left));
 3041                                 uio_uio_resid_add(uiop, -(left));
 3042                                 uiop->uio_offset += left;
 3043                                 blksiz = 0;
 3044                         }
 3045                         if ((int)(tlen + DIRHDSIZ + NFSX_HYPER) > uio_uio_resid(uiop))
 3046                                 bigenough = 0;
 3047                         if (bigenough) {
 3048                                 dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 3049                                 dp->d_namlen = len;
 3050                                 dp->d_reclen = tlen + DIRHDSIZ + NFSX_HYPER;
 3051                                 dp->d_type = DT_UNKNOWN;
 3052                                 blksiz += dp->d_reclen;
 3053                                 if (blksiz == DIRBLKSIZ)
 3054                                         blksiz = 0;
 3055                                 uio_uio_resid_add(uiop, -(DIRHDSIZ));
 3056                                 uiop->uio_offset += DIRHDSIZ;
 3057                                 uio_iov_base_add(uiop, DIRHDSIZ);
 3058                                 uio_iov_len_add(uiop, -(DIRHDSIZ));
 3059                                 error = nfsm_mbufuio(nd, uiop, len);
 3060                                 if (error)
 3061                                         goto nfsmout;
 3062                                 cp = CAST_DOWN(caddr_t, uio_iov_base(uiop));
 3063                                 tlen -= len;
 3064                                 NFSBZERO(cp, tlen);
 3065                                 cp += tlen;     /* points to cookie storage */
 3066                                 tl2 = (u_int32_t *)cp;
 3067                                 uio_iov_base_add(uiop, (tlen + NFSX_HYPER));
 3068                                 uio_iov_len_add(uiop, -(tlen + NFSX_HYPER));
 3069                                 uio_uio_resid_add(uiop, -(tlen + NFSX_HYPER));
 3070                                 uiop->uio_offset += (tlen + NFSX_HYPER);
 3071                         } else {
 3072                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 3073                                 if (error)
 3074                                         goto nfsmout;
 3075                         }
 3076                         if (nd->nd_flag & ND_NFSV4) {
 3077                                 rderr = 0;
 3078                                 nfsva.na_mntonfileno = 0xffffffff;
 3079                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 3080                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 3081                                     NULL, NULL, &rderr, p, cred);
 3082                                 if (error)
 3083                                         goto nfsmout;
 3084                                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3085                         } else if (nd->nd_flag & ND_NFSV3) {
 3086                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3087                                 ncookie.lval[0] = *tl++;
 3088                                 ncookie.lval[1] = *tl++;
 3089                         } else {
 3090                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 3091                                 ncookie.lval[0] = 0;
 3092                                 ncookie.lval[1] = *tl++;
 3093                         }
 3094                         if (bigenough) {
 3095                             if (nd->nd_flag & ND_NFSV4) {
 3096                                 if (rderr) {
 3097                                     dp->d_fileno = 0;
 3098                                 } else {
 3099                                     if (gotmnton) {
 3100                                         if (nfsva.na_mntonfileno != 0xffffffff)
 3101                                             dp->d_fileno = nfsva.na_mntonfileno;
 3102                                         else
 3103                                             dp->d_fileno = nfsva.na_fileid;
 3104                                     } else if (nfsva.na_filesid[0] ==
 3105                                         dnp->n_vattr.na_filesid[0] &&
 3106                                         nfsva.na_filesid[1] ==
 3107                                         dnp->n_vattr.na_filesid[1]) {
 3108                                         dp->d_fileno = nfsva.na_fileid;
 3109                                     } else {
 3110                                         do {
 3111                                             fakefileno--;
 3112                                         } while (fakefileno ==
 3113                                             nfsva.na_fileid);
 3114                                         dp->d_fileno = fakefileno;
 3115                                     }
 3116                                     dp->d_type = vtonfs_dtype(nfsva.na_type);
 3117                                 }
 3118                             } else {
 3119                                 dp->d_fileno = nfsva.na_fileid;
 3120                             }
 3121                             *tl2++ = cookiep->nfsuquad[0] = cookie.lval[0] =
 3122                                 ncookie.lval[0];
 3123                             *tl2 = cookiep->nfsuquad[1] = cookie.lval[1] =
 3124                                 ncookie.lval[1];
 3125                         }
 3126                         more_dirs = fxdr_unsigned(int, *tl);
 3127                 }
 3128                 /*
 3129                  * If at end of rpc data, get the eof boolean
 3130                  */
 3131                 if (!more_dirs) {
 3132                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3133                         eof = fxdr_unsigned(int, *tl);
 3134                         if (tryformoredirs)
 3135                                 more_dirs = !eof;
 3136                         if (nd->nd_flag & ND_NFSV4) {
 3137                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 3138                                     stuff);
 3139                                 if (error)
 3140                                         goto nfsmout;
 3141                         }
 3142                 }
 3143                 mbuf_freem(nd->nd_mrep);
 3144                 nd->nd_mrep = NULL;
 3145         }
 3146         /*
 3147          * Fill last record, iff any, out to a multiple of DIRBLKSIZ
 3148          * by increasing d_reclen for the last record.
 3149          */
 3150         if (blksiz > 0) {
 3151                 left = DIRBLKSIZ - blksiz;
 3152                 NFSBZERO(uio_iov_base(uiop), left);
 3153                 dp->d_reclen += left;
 3154                 uio_iov_base_add(uiop, left);
 3155                 uio_iov_len_add(uiop, -(left));
 3156                 uio_uio_resid_add(uiop, -(left));
 3157                 uiop->uio_offset += left;
 3158         }
 3159 
 3160         /*
 3161          * If returning no data, assume end of file.
 3162          * If not bigenough, return not end of file, since you aren't
 3163          *    returning all the data
 3164          * Otherwise, return the eof flag from the server.
 3165          */
 3166         if (eofp) {
 3167                 if (tresid == ((size_t)(uio_uio_resid(uiop))))
 3168                         *eofp = 1;
 3169                 else if (!bigenough)
 3170                         *eofp = 0;
 3171                 else
 3172                         *eofp = eof;
 3173         }
 3174 
 3175         /*
 3176          * Add extra empty records to any remaining DIRBLKSIZ chunks.
 3177          */
 3178         while (uio_uio_resid(uiop) > 0 && ((size_t)(uio_uio_resid(uiop))) != tresid) {
 3179                 dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 3180                 NFSBZERO(dp, DIRBLKSIZ);
 3181                 dp->d_type = DT_UNKNOWN;
 3182                 tl = (u_int32_t *)&dp->d_name[4];
 3183                 *tl++ = cookie.lval[0];
 3184                 *tl = cookie.lval[1];
 3185                 dp->d_reclen = DIRBLKSIZ;
 3186                 uio_iov_base_add(uiop, DIRBLKSIZ);
 3187                 uio_iov_len_add(uiop, -(DIRBLKSIZ));
 3188                 uio_uio_resid_add(uiop, -(DIRBLKSIZ));
 3189                 uiop->uio_offset += DIRBLKSIZ;
 3190         }
 3191 
 3192 nfsmout:
 3193         if (nd->nd_mrep != NULL)
 3194                 mbuf_freem(nd->nd_mrep);
 3195         return (error);
 3196 }
 3197 
 3198 #ifndef APPLE
 3199 /*
 3200  * NFS V3 readdir plus RPC. Used in place of nfsrpc_readdir().
 3201  * (Also used for NFS V4 when mount flag set.)
 3202  * (ditto above w.r.t. multiple of DIRBLKSIZ, etc.)
 3203  */
 3204 int
 3205 nfsrpc_readdirplus(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
 3206     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 3207     int *eofp, void *stuff)
 3208 {
 3209         int len, left;
 3210         struct dirent *dp = NULL;
 3211         u_int32_t *tl;
 3212         vnode_t newvp = NULLVP;
 3213         struct nfsrv_descript nfsd, *nd = &nfsd;
 3214         struct nameidata nami, *ndp = &nami;
 3215         struct componentname *cnp = &ndp->ni_cnd;
 3216         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 3217         struct nfsnode *dnp = VTONFS(vp), *np;
 3218         struct nfsvattr nfsva;
 3219         struct nfsfh *nfhp;
 3220         nfsquad_t cookie, ncookie;
 3221         int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
 3222         int attrflag, tryformoredirs = 1, eof = 0, gotmnton = 0;
 3223         int isdotdot = 0, unlocknewvp = 0;
 3224         long dotfileid, dotdotfileid = 0, fileno = 0;
 3225         char *cp;
 3226         nfsattrbit_t attrbits, dattrbits;
 3227         size_t tresid;
 3228         u_int32_t *tl2 = NULL, fakefileno = 0xffffffff, rderr;
 3229         struct timespec dctime;
 3230 
 3231         KASSERT(uiop->uio_iovcnt == 1 &&
 3232             (uio_uio_resid(uiop) & (DIRBLKSIZ - 1)) == 0,
 3233             ("nfs readdirplusrpc bad uio"));
 3234         timespecclear(&dctime);
 3235         *attrflagp = 0;
 3236         if (eofp != NULL)
 3237                 *eofp = 0;
 3238         ndp->ni_dvp = vp;
 3239         nd->nd_mrep = NULL;
 3240         cookie.lval[0] = cookiep->nfsuquad[0];
 3241         cookie.lval[1] = cookiep->nfsuquad[1];
 3242         tresid = uio_uio_resid(uiop);
 3243 
 3244         /*
 3245          * For NFSv4, first create the "." and ".." entries.
 3246          */
 3247         if (NFSHASNFSV4(nmp)) {
 3248                 NFSGETATTR_ATTRBIT(&dattrbits);
 3249                 NFSZERO_ATTRBIT(&attrbits);
 3250                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FILEID);
 3251                 if (NFSISSET_ATTRBIT(&dnp->n_vattr.na_suppattr,
 3252                     NFSATTRBIT_MOUNTEDONFILEID)) {
 3253                         NFSSETBIT_ATTRBIT(&attrbits,
 3254                             NFSATTRBIT_MOUNTEDONFILEID);
 3255                         gotmnton = 1;
 3256                 } else {
 3257                         /*
 3258                          * Must fake it. Use the fileno, except when the
 3259                          * fsid is != to that of the directory. For that
 3260                          * case, generate a fake fileno that is not the same.
 3261                          */
 3262                         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FSID);
 3263                         gotmnton = 0;
 3264                 }
 3265 
 3266                 /*
 3267                  * Joy, oh joy. For V4 we get to hand craft '.' and '..'.
 3268                  */
 3269                 if (uiop->uio_offset == 0) {
 3270                         NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, vp);
 3271                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 3272                         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 3273                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3274                         (void) nfsrv_putattrbit(nd, &attrbits);
 3275                         error = nfscl_request(nd, vp, p, cred, stuff);
 3276                         if (error)
 3277                             return (error);
 3278                         dotfileid = 0;  /* Fake out the compiler. */
 3279                         if ((nd->nd_flag & ND_NOMOREDATA) == 0) {
 3280                             error = nfsm_loadattr(nd, &nfsva);
 3281                             if (error != 0)
 3282                                 goto nfsmout;
 3283                             dctime = nfsva.na_ctime;
 3284                             dotfileid = nfsva.na_fileid;
 3285                         }
 3286                         if (nd->nd_repstat == 0) {
 3287                             NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 3288                             len = fxdr_unsigned(int, *(tl + 4));
 3289                             if (len > 0 && len <= NFSX_V4FHMAX)
 3290                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 3291                             else
 3292                                 error = EPERM;
 3293                             if (!error) {
 3294                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 3295                                 nfsva.na_mntonfileno = 0xffffffff;
 3296                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 3297                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 3298                                     NULL, NULL, NULL, p, cred);
 3299                                 if (error) {
 3300                                     dotdotfileid = dotfileid;
 3301                                 } else if (gotmnton) {
 3302                                     if (nfsva.na_mntonfileno != 0xffffffff)
 3303                                         dotdotfileid = nfsva.na_mntonfileno;
 3304                                     else
 3305                                         dotdotfileid = nfsva.na_fileid;
 3306                                 } else if (nfsva.na_filesid[0] ==
 3307                                     dnp->n_vattr.na_filesid[0] &&
 3308                                     nfsva.na_filesid[1] ==
 3309                                     dnp->n_vattr.na_filesid[1]) {
 3310                                     dotdotfileid = nfsva.na_fileid;
 3311                                 } else {
 3312                                     do {
 3313                                         fakefileno--;
 3314                                     } while (fakefileno ==
 3315                                         nfsva.na_fileid);
 3316                                     dotdotfileid = fakefileno;
 3317                                 }
 3318                             }
 3319                         } else if (nd->nd_repstat == NFSERR_NOENT) {
 3320                             /*
 3321                              * Lookupp returns NFSERR_NOENT when we are
 3322                              * at the root, so just use the current dir.
 3323                              */
 3324                             nd->nd_repstat = 0;
 3325                             dotdotfileid = dotfileid;
 3326                         } else {
 3327                             error = nd->nd_repstat;
 3328                         }
 3329                         mbuf_freem(nd->nd_mrep);
 3330                         if (error)
 3331                             return (error);
 3332                         nd->nd_mrep = NULL;
 3333                         dp = (struct dirent *)uio_iov_base(uiop);
 3334                         dp->d_type = DT_DIR;
 3335                         dp->d_fileno = dotfileid;
 3336                         dp->d_namlen = 1;
 3337                         dp->d_name[0] = '.';
 3338                         dp->d_name[1] = '\0';
 3339                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 3340                         /*
 3341                          * Just make these offset cookie 0.
 3342                          */
 3343                         tl = (u_int32_t *)&dp->d_name[4];
 3344                         *tl++ = 0;
 3345                         *tl = 0;
 3346                         blksiz += dp->d_reclen;
 3347                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 3348                         uiop->uio_offset += dp->d_reclen;
 3349                         uio_iov_base_add(uiop, dp->d_reclen);
 3350                         uio_iov_len_add(uiop, -(dp->d_reclen));
 3351                         dp = (struct dirent *)uio_iov_base(uiop);
 3352                         dp->d_type = DT_DIR;
 3353                         dp->d_fileno = dotdotfileid;
 3354                         dp->d_namlen = 2;
 3355                         dp->d_name[0] = '.';
 3356                         dp->d_name[1] = '.';
 3357                         dp->d_name[2] = '\0';
 3358                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 3359                         /*
 3360                          * Just make these offset cookie 0.
 3361                          */
 3362                         tl = (u_int32_t *)&dp->d_name[4];
 3363                         *tl++ = 0;
 3364                         *tl = 0;
 3365                         blksiz += dp->d_reclen;
 3366                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 3367                         uiop->uio_offset += dp->d_reclen;
 3368                         uio_iov_base_add(uiop, dp->d_reclen);
 3369                         uio_iov_len_add(uiop, -(dp->d_reclen));
 3370                 }
 3371                 NFSREADDIRPLUS_ATTRBIT(&attrbits);
 3372                 if (gotmnton)
 3373                         NFSSETBIT_ATTRBIT(&attrbits,
 3374                             NFSATTRBIT_MOUNTEDONFILEID);
 3375         }
 3376 
 3377         /*
 3378          * Loop around doing readdir rpc's of size nm_readdirsize.
 3379          * The stopping criteria is EOF or buffer full.
 3380          */
 3381         while (more_dirs && bigenough) {
 3382                 *attrflagp = 0;
 3383                 NFSCL_REQSTART(nd, NFSPROC_READDIRPLUS, vp);
 3384                 NFSM_BUILD(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
 3385                 *tl++ = cookie.lval[0];
 3386                 *tl++ = cookie.lval[1];
 3387                 if (cookie.qval == 0) {
 3388                         *tl++ = 0;
 3389                         *tl++ = 0;
 3390                 } else {
 3391                         NFSLOCKNODE(dnp);
 3392                         *tl++ = dnp->n_cookieverf.nfsuquad[0];
 3393                         *tl++ = dnp->n_cookieverf.nfsuquad[1];
 3394                         NFSUNLOCKNODE(dnp);
 3395                 }
 3396                 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
 3397                 *tl = txdr_unsigned(nmp->nm_readdirsize);
 3398                 if (nd->nd_flag & ND_NFSV4) {
 3399                         (void) nfsrv_putattrbit(nd, &attrbits);
 3400                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 3401                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3402                         (void) nfsrv_putattrbit(nd, &dattrbits);
 3403                 }
 3404                 error = nfscl_request(nd, vp, p, cred, stuff);
 3405                 if (error)
 3406                         return (error);
 3407                 if (nd->nd_flag & ND_NFSV3)
 3408                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3409                 if (nd->nd_repstat || error) {
 3410                         if (!error)
 3411                                 error = nd->nd_repstat;
 3412                         goto nfsmout;
 3413                 }
 3414                 if ((nd->nd_flag & ND_NFSV3) != 0 && *attrflagp != 0)
 3415                         dctime = nap->na_ctime;
 3416                 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3417                 NFSLOCKNODE(dnp);
 3418                 dnp->n_cookieverf.nfsuquad[0] = *tl++;
 3419                 dnp->n_cookieverf.nfsuquad[1] = *tl++;
 3420                 NFSUNLOCKNODE(dnp);
 3421                 more_dirs = fxdr_unsigned(int, *tl);
 3422                 if (!more_dirs)
 3423                         tryformoredirs = 0;
 3424         
 3425                 /* loop through the dir entries, doctoring them to 4bsd form */
 3426                 while (more_dirs && bigenough) {
 3427                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3428                         if (nd->nd_flag & ND_NFSV4) {
 3429                                 ncookie.lval[0] = *tl++;
 3430                                 ncookie.lval[1] = *tl++;
 3431                         } else {
 3432                                 fileno = fxdr_unsigned(long, *++tl);
 3433                                 tl++;
 3434                         }
 3435                         len = fxdr_unsigned(int, *tl);
 3436                         if (len <= 0 || len > NFS_MAXNAMLEN) {
 3437                                 error = EBADRPC;
 3438                                 goto nfsmout;
 3439                         }
 3440                         tlen = NFSM_RNDUP(len);
 3441                         if (tlen == len)
 3442                                 tlen += 4;  /* To ensure null termination */
 3443                         left = DIRBLKSIZ - blksiz;
 3444                         if ((tlen + DIRHDSIZ + NFSX_HYPER) > left) {
 3445                                 NFSBZERO(uio_iov_base(uiop), left);
 3446                                 dp->d_reclen += left;
 3447                                 uio_iov_base_add(uiop, left);
 3448                                 uio_iov_len_add(uiop, -(left));
 3449                                 uio_uio_resid_add(uiop, -(left));
 3450                                 uiop->uio_offset += left;
 3451                                 blksiz = 0;
 3452                         }
 3453                         if ((tlen + DIRHDSIZ + NFSX_HYPER) > uio_uio_resid(uiop))
 3454                                 bigenough = 0;
 3455                         if (bigenough) {
 3456                                 dp = (struct dirent *)uio_iov_base(uiop);
 3457                                 dp->d_namlen = len;
 3458                                 dp->d_reclen = tlen + DIRHDSIZ + NFSX_HYPER;
 3459                                 dp->d_type = DT_UNKNOWN;
 3460                                 blksiz += dp->d_reclen;
 3461                                 if (blksiz == DIRBLKSIZ)
 3462                                         blksiz = 0;
 3463                                 uio_uio_resid_add(uiop, -(DIRHDSIZ));
 3464                                 uiop->uio_offset += DIRHDSIZ;
 3465                                 uio_iov_base_add(uiop, DIRHDSIZ);
 3466                                 uio_iov_len_add(uiop, -(DIRHDSIZ));
 3467                                 cnp->cn_nameptr = uio_iov_base(uiop);
 3468                                 cnp->cn_namelen = len;
 3469                                 NFSCNHASHZERO(cnp);
 3470                                 error = nfsm_mbufuio(nd, uiop, len);
 3471                                 if (error)
 3472                                         goto nfsmout;
 3473                                 cp = uio_iov_base(uiop);
 3474                                 tlen -= len;
 3475                                 NFSBZERO(cp, tlen);
 3476                                 cp += tlen;     /* points to cookie storage */
 3477                                 tl2 = (u_int32_t *)cp;
 3478                                 if (len == 2 && cnp->cn_nameptr[0] == '.' &&
 3479                                     cnp->cn_nameptr[1] == '.')
 3480                                         isdotdot = 1;
 3481                                 else
 3482                                         isdotdot = 0;
 3483                                 uio_iov_base_add(uiop, (tlen + NFSX_HYPER));
 3484                                 uio_iov_len_add(uiop, -(tlen + NFSX_HYPER));
 3485                                 uio_uio_resid_add(uiop, -(tlen + NFSX_HYPER));
 3486                                 uiop->uio_offset += (tlen + NFSX_HYPER);
 3487                         } else {
 3488                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 3489                                 if (error)
 3490                                         goto nfsmout;
 3491                         }
 3492                         nfhp = NULL;
 3493                         if (nd->nd_flag & ND_NFSV3) {
 3494                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3495                                 ncookie.lval[0] = *tl++;
 3496                                 ncookie.lval[1] = *tl++;
 3497                                 attrflag = fxdr_unsigned(int, *tl);
 3498                                 if (attrflag) {
 3499                                   error = nfsm_loadattr(nd, &nfsva);
 3500                                   if (error)
 3501                                         goto nfsmout;
 3502                                 }
 3503                                 NFSM_DISSECT(tl,u_int32_t *,NFSX_UNSIGNED);
 3504                                 if (*tl) {
 3505                                         error = nfsm_getfh(nd, &nfhp);
 3506                                         if (error)
 3507                                             goto nfsmout;
 3508                                 }
 3509                                 if (!attrflag && nfhp != NULL) {
 3510                                         FREE((caddr_t)nfhp, M_NFSFH);
 3511                                         nfhp = NULL;
 3512                                 }
 3513                         } else {
 3514                                 rderr = 0;
 3515                                 nfsva.na_mntonfileno = 0xffffffff;
 3516                                 error = nfsv4_loadattr(nd, NULL, &nfsva, &nfhp,
 3517                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 3518                                     NULL, NULL, &rderr, p, cred);
 3519                                 if (error)
 3520                                         goto nfsmout;
 3521                         }
 3522 
 3523                         if (bigenough) {
 3524                             if (nd->nd_flag & ND_NFSV4) {
 3525                                 if (rderr) {
 3526                                     dp->d_fileno = 0;
 3527                                 } else if (gotmnton) {
 3528                                     if (nfsva.na_mntonfileno != 0xffffffff)
 3529                                         dp->d_fileno = nfsva.na_mntonfileno;
 3530                                     else
 3531                                         dp->d_fileno = nfsva.na_fileid;
 3532                                 } else if (nfsva.na_filesid[0] ==
 3533                                     dnp->n_vattr.na_filesid[0] &&
 3534                                     nfsva.na_filesid[1] ==
 3535                                     dnp->n_vattr.na_filesid[1]) {
 3536                                     dp->d_fileno = nfsva.na_fileid;
 3537                                 } else {
 3538                                     do {
 3539                                         fakefileno--;
 3540                                     } while (fakefileno ==
 3541                                         nfsva.na_fileid);
 3542                                     dp->d_fileno = fakefileno;
 3543                                 }
 3544                             } else {
 3545                                 dp->d_fileno = fileno;
 3546                             }
 3547                             *tl2++ = cookiep->nfsuquad[0] = cookie.lval[0] =
 3548                                 ncookie.lval[0];
 3549                             *tl2 = cookiep->nfsuquad[1] = cookie.lval[1] =
 3550                                 ncookie.lval[1];
 3551 
 3552                             if (nfhp != NULL) {
 3553                                 if (NFSRV_CMPFH(nfhp->nfh_fh, nfhp->nfh_len,
 3554                                     dnp->n_fhp->nfh_fh, dnp->n_fhp->nfh_len)) {
 3555                                     VREF(vp);
 3556                                     newvp = vp;
 3557                                     unlocknewvp = 0;
 3558                                     FREE((caddr_t)nfhp, M_NFSFH);
 3559                                     np = dnp;
 3560                                 } else if (isdotdot != 0) {
 3561                                     /*
 3562                                      * Skip doing a nfscl_nget() call for "..".
 3563                                      * There's a race between acquiring the nfs
 3564                                      * node here and lookups that look for the
 3565                                      * directory being read (in the parent).
 3566                                      * It would try to get a lock on ".." here,
 3567                                      * owning the lock on the directory being
 3568                                      * read. Lookup will hold the lock on ".."
 3569                                      * and try to acquire the lock on the
 3570                                      * directory being read.
 3571                                      * If the directory is unlocked/relocked,
 3572                                      * then there is a LOR with the buflock
 3573                                      * vp is relocked.
 3574                                      */
 3575                                     free(nfhp, M_NFSFH);
 3576                                 } else {
 3577                                     error = nfscl_nget(vnode_mount(vp), vp,
 3578                                       nfhp, cnp, p, &np, NULL, LK_EXCLUSIVE);
 3579                                     if (!error) {
 3580                                         newvp = NFSTOV(np);
 3581                                         unlocknewvp = 1;
 3582                                     }
 3583                                 }
 3584                                 nfhp = NULL;
 3585                                 if (newvp != NULLVP) {
 3586                                     error = nfscl_loadattrcache(&newvp,
 3587                                         &nfsva, NULL, NULL, 0, 0);
 3588                                     if (error) {
 3589                                         if (unlocknewvp)
 3590                                             vput(newvp);
 3591                                         else
 3592                                             vrele(newvp);
 3593                                         goto nfsmout;
 3594                                     }
 3595                                     dp->d_type =
 3596                                         vtonfs_dtype(np->n_vattr.na_type);
 3597                                     ndp->ni_vp = newvp;
 3598                                     NFSCNHASH(cnp, HASHINIT);
 3599                                     if (cnp->cn_namelen <= NCHNAMLEN &&
 3600                                         (newvp->v_type != VDIR ||
 3601                                          dctime.tv_sec != 0)) {
 3602                                         cache_enter_time(ndp->ni_dvp,
 3603                                             ndp->ni_vp, cnp,
 3604                                             &nfsva.na_ctime,
 3605                                             newvp->v_type != VDIR ? NULL :
 3606                                             &dctime);
 3607                                     }
 3608                                     if (unlocknewvp)
 3609                                         vput(newvp);
 3610                                     else
 3611                                         vrele(newvp);
 3612                                     newvp = NULLVP;
 3613                                 }
 3614                             }
 3615                         } else if (nfhp != NULL) {
 3616                             FREE((caddr_t)nfhp, M_NFSFH);
 3617                         }
 3618                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3619                         more_dirs = fxdr_unsigned(int, *tl);
 3620                 }
 3621                 /*
 3622                  * If at end of rpc data, get the eof boolean
 3623                  */
 3624                 if (!more_dirs) {
 3625                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3626                         eof = fxdr_unsigned(int, *tl);
 3627                         if (tryformoredirs)
 3628                                 more_dirs = !eof;
 3629                         if (nd->nd_flag & ND_NFSV4) {
 3630                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 3631                                     stuff);
 3632                                 if (error)
 3633                                         goto nfsmout;
 3634                         }
 3635                 }
 3636                 mbuf_freem(nd->nd_mrep);
 3637                 nd->nd_mrep = NULL;
 3638         }
 3639         /*
 3640          * Fill last record, iff any, out to a multiple of DIRBLKSIZ
 3641          * by increasing d_reclen for the last record.
 3642          */
 3643         if (blksiz > 0) {
 3644                 left = DIRBLKSIZ - blksiz;
 3645                 NFSBZERO(uio_iov_base(uiop), left);
 3646                 dp->d_reclen += left;
 3647                 uio_iov_base_add(uiop, left);
 3648                 uio_iov_len_add(uiop, -(left));
 3649                 uio_uio_resid_add(uiop, -(left));
 3650                 uiop->uio_offset += left;
 3651         }
 3652 
 3653         /*
 3654          * If returning no data, assume end of file.
 3655          * If not bigenough, return not end of file, since you aren't
 3656          *    returning all the data
 3657          * Otherwise, return the eof flag from the server.
 3658          */
 3659         if (eofp != NULL) {
 3660                 if (tresid == uio_uio_resid(uiop))
 3661                         *eofp = 1;
 3662                 else if (!bigenough)
 3663                         *eofp = 0;
 3664                 else
 3665                         *eofp = eof;
 3666         }
 3667 
 3668         /*
 3669          * Add extra empty records to any remaining DIRBLKSIZ chunks.
 3670          */
 3671         while (uio_uio_resid(uiop) > 0 && uio_uio_resid(uiop) != tresid) {
 3672                 dp = (struct dirent *)uio_iov_base(uiop);
 3673                 NFSBZERO(dp, DIRBLKSIZ);
 3674                 dp->d_type = DT_UNKNOWN;
 3675                 tl = (u_int32_t *)&dp->d_name[4];
 3676                 *tl++ = cookie.lval[0];
 3677                 *tl = cookie.lval[1];
 3678                 dp->d_reclen = DIRBLKSIZ;
 3679                 uio_iov_base_add(uiop, DIRBLKSIZ);
 3680                 uio_iov_len_add(uiop, -(DIRBLKSIZ));
 3681                 uio_uio_resid_add(uiop, -(DIRBLKSIZ));
 3682                 uiop->uio_offset += DIRBLKSIZ;
 3683         }
 3684 
 3685 nfsmout:
 3686         if (nd->nd_mrep != NULL)
 3687                 mbuf_freem(nd->nd_mrep);
 3688         return (error);
 3689 }
 3690 #endif  /* !APPLE */
 3691 
 3692 /*
 3693  * Nfs commit rpc
 3694  */
 3695 int
 3696 nfsrpc_commit(vnode_t vp, u_quad_t offset, int cnt, struct ucred *cred,
 3697     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 3698 {
 3699         u_int32_t *tl;
 3700         struct nfsrv_descript nfsd, *nd = &nfsd;
 3701         nfsattrbit_t attrbits;
 3702         int error;
 3703         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 3704         
 3705         *attrflagp = 0;
 3706         NFSCL_REQSTART(nd, NFSPROC_COMMIT, vp);
 3707         NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3708         txdr_hyper(offset, tl);
 3709         tl += 2;
 3710         *tl = txdr_unsigned(cnt);
 3711         if (nd->nd_flag & ND_NFSV4) {
 3712                 /*
 3713                  * And do a Getattr op.
 3714                  */
 3715                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 3716                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3717                 NFSGETATTR_ATTRBIT(&attrbits);
 3718                 (void) nfsrv_putattrbit(nd, &attrbits);
 3719         }
 3720         error = nfscl_request(nd, vp, p, cred, stuff);
 3721         if (error)
 3722                 return (error);
 3723         error = nfscl_wcc_data(nd, vp, nap, attrflagp, NULL, stuff);
 3724         if (!error && !nd->nd_repstat) {
 3725                 NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF);
 3726                 NFSLOCKMNT(nmp);
 3727                 if (NFSBCMP(nmp->nm_verf, tl, NFSX_VERF)) {
 3728                         NFSBCOPY(tl, nmp->nm_verf, NFSX_VERF);
 3729                         nd->nd_repstat = NFSERR_STALEWRITEVERF;
 3730                 }
 3731                 NFSUNLOCKMNT(nmp);
 3732                 if (nd->nd_flag & ND_NFSV4)
 3733                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3734         }
 3735 nfsmout:
 3736         if (!error && nd->nd_repstat)
 3737                 error = nd->nd_repstat;
 3738         mbuf_freem(nd->nd_mrep);
 3739         return (error);
 3740 }
 3741 
 3742 /*
 3743  * NFS byte range lock rpc.
 3744  * (Mostly just calls one of the three lower level RPC routines.)
 3745  */
 3746 int
 3747 nfsrpc_advlock(vnode_t vp, off_t size, int op, struct flock *fl,
 3748     int reclaim, struct ucred *cred, NFSPROC_T *p, void *id, int flags)
 3749 {
 3750         struct nfscllockowner *lp;
 3751         struct nfsclclient *clp;
 3752         struct nfsfh *nfhp;
 3753         struct nfsrv_descript nfsd, *nd = &nfsd;
 3754         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 3755         u_int64_t off, len;
 3756         off_t start, end;
 3757         u_int32_t clidrev = 0;
 3758         int error = 0, newone = 0, expireret = 0, retrycnt, donelocally;
 3759         int callcnt, dorpc;
 3760 
 3761         /*
 3762          * Convert the flock structure into a start and end and do POSIX
 3763          * bounds checking.
 3764          */
 3765         switch (fl->l_whence) {
 3766         case SEEK_SET:
 3767         case SEEK_CUR:
 3768                 /*
 3769                  * Caller is responsible for adding any necessary offset
 3770                  * when SEEK_CUR is used.
 3771                  */
 3772                 start = fl->l_start;
 3773                 off = fl->l_start;
 3774                 break;
 3775         case SEEK_END:
 3776                 start = size + fl->l_start;
 3777                 off = size + fl->l_start;
 3778                 break;
 3779         default:
 3780                 return (EINVAL);
 3781         }
 3782         if (start < 0)
 3783                 return (EINVAL);
 3784         if (fl->l_len != 0) {
 3785                 end = start + fl->l_len - 1;
 3786                 if (end < start)
 3787                         return (EINVAL);
 3788         }
 3789 
 3790         len = fl->l_len;
 3791         if (len == 0)
 3792                 len = NFS64BITSSET;
 3793         retrycnt = 0;
 3794         do {
 3795             nd->nd_repstat = 0;
 3796             if (op == F_GETLK) {
 3797                 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
 3798                 if (error)
 3799                         return (error);
 3800                 error = nfscl_lockt(vp, clp, off, len, fl, p, id, flags);
 3801                 if (!error) {
 3802                         clidrev = clp->nfsc_clientidrev;
 3803                         error = nfsrpc_lockt(nd, vp, clp, off, len, fl, cred,
 3804                             p, id, flags);
 3805                 } else if (error == -1) {
 3806                         error = 0;
 3807                 }
 3808                 nfscl_clientrelease(clp);
 3809             } else if (op == F_UNLCK && fl->l_type == F_UNLCK) {
 3810                 /*
 3811                  * We must loop around for all lockowner cases.
 3812                  */
 3813                 callcnt = 0;
 3814                 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
 3815                 if (error)
 3816                         return (error);
 3817                 do {
 3818                     error = nfscl_relbytelock(vp, off, len, cred, p, callcnt,
 3819                         clp, id, flags, &lp, &dorpc);
 3820                     /*
 3821                      * If it returns a NULL lp, we're done.
 3822                      */
 3823                     if (lp == NULL) {
 3824                         if (callcnt == 0)
 3825                             nfscl_clientrelease(clp);
 3826                         else
 3827                             nfscl_releasealllocks(clp, vp, p, id, flags);
 3828                         return (error);
 3829                     }
 3830                     if (nmp->nm_clp != NULL)
 3831                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 3832                     else
 3833                         clidrev = 0;
 3834                     /*
 3835                      * If the server doesn't support Posix lock semantics,
 3836                      * only allow locks on the entire file, since it won't
 3837                      * handle overlapping byte ranges.
 3838                      * There might still be a problem when a lock
 3839                      * upgrade/downgrade (read<->write) occurs, since the
 3840                      * server "might" expect an unlock first?
 3841                      */
 3842                     if (dorpc && (lp->nfsl_open->nfso_posixlock ||
 3843                         (off == 0 && len == NFS64BITSSET))) {
 3844                         /*
 3845                          * Since the lock records will go away, we must
 3846                          * wait for grace and delay here.
 3847                          */
 3848                         do {
 3849                             error = nfsrpc_locku(nd, nmp, lp, off, len,
 3850                                 NFSV4LOCKT_READ, cred, p, 0);
 3851                             if ((nd->nd_repstat == NFSERR_GRACE ||
 3852                                  nd->nd_repstat == NFSERR_DELAY) &&
 3853                                 error == 0)
 3854                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
 3855                                     "nfs_advlock");
 3856                         } while ((nd->nd_repstat == NFSERR_GRACE ||
 3857                             nd->nd_repstat == NFSERR_DELAY) && error == 0);
 3858                     }
 3859                     callcnt++;
 3860                 } while (error == 0 && nd->nd_repstat == 0);
 3861                 nfscl_releasealllocks(clp, vp, p, id, flags);
 3862             } else if (op == F_SETLK) {
 3863                 error = nfscl_getbytelock(vp, off, len, fl->l_type, cred, p,
 3864                     NULL, 0, id, flags, NULL, NULL, &lp, &newone, &donelocally);
 3865                 if (error || donelocally) {
 3866                         return (error);
 3867                 }
 3868                 if (nmp->nm_clp != NULL)
 3869                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 3870                 else
 3871                         clidrev = 0;
 3872                 nfhp = VTONFS(vp)->n_fhp;
 3873                 if (!lp->nfsl_open->nfso_posixlock &&
 3874                     (off != 0 || len != NFS64BITSSET)) {
 3875                         error = EINVAL;
 3876                 } else {
 3877                         error = nfsrpc_lock(nd, nmp, vp, nfhp->nfh_fh,
 3878                             nfhp->nfh_len, lp, newone, reclaim, off,
 3879                             len, fl->l_type, cred, p, 0);
 3880                 }
 3881                 if (!error)
 3882                         error = nd->nd_repstat;
 3883                 nfscl_lockrelease(lp, error, newone);
 3884             } else {
 3885                 error = EINVAL;
 3886             }
 3887             if (!error)
 3888                 error = nd->nd_repstat;
 3889             if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 3890                 error == NFSERR_STALEDONTRECOVER ||
 3891                 error == NFSERR_STALECLIENTID || error == NFSERR_DELAY ||
 3892                 error == NFSERR_BADSESSION) {
 3893                 (void) nfs_catnap(PZERO, error, "nfs_advlock");
 3894             } else if ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID)
 3895                 && clidrev != 0) {
 3896                 expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 3897                 retrycnt++;
 3898             }
 3899         } while (error == NFSERR_GRACE ||
 3900             error == NFSERR_STALECLIENTID || error == NFSERR_DELAY ||
 3901             error == NFSERR_STALEDONTRECOVER || error == NFSERR_STALESTATEID ||
 3902             error == NFSERR_BADSESSION ||
 3903             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 3904              expireret == 0 && clidrev != 0 && retrycnt < 4));
 3905         if (error && retrycnt >= 4)
 3906                 error = EIO;
 3907         return (error);
 3908 }
 3909 
 3910 /*
 3911  * The lower level routine for the LockT case.
 3912  */
 3913 int
 3914 nfsrpc_lockt(struct nfsrv_descript *nd, vnode_t vp,
 3915     struct nfsclclient *clp, u_int64_t off, u_int64_t len, struct flock *fl,
 3916     struct ucred *cred, NFSPROC_T *p, void *id, int flags)
 3917 {
 3918         u_int32_t *tl;
 3919         int error, type, size;
 3920         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 3921         struct nfsnode *np;
 3922         struct nfsmount *nmp;
 3923         struct nfsclsession *tsep;
 3924 
 3925         nmp = VFSTONFS(vp->v_mount);
 3926         NFSCL_REQSTART(nd, NFSPROC_LOCKT, vp);
 3927         NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
 3928         if (fl->l_type == F_RDLCK)
 3929                 *tl++ = txdr_unsigned(NFSV4LOCKT_READ);
 3930         else
 3931                 *tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
 3932         txdr_hyper(off, tl);
 3933         tl += 2;
 3934         txdr_hyper(len, tl);
 3935         tl += 2;
 3936         tsep = nfsmnt_mdssession(nmp);
 3937         *tl++ = tsep->nfsess_clientid.lval[0];
 3938         *tl = tsep->nfsess_clientid.lval[1];
 3939         nfscl_filllockowner(id, own, flags);
 3940         np = VTONFS(vp);
 3941         NFSBCOPY(np->n_fhp->nfh_fh, &own[NFSV4CL_LOCKNAMELEN],
 3942             np->n_fhp->nfh_len);
 3943         (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + np->n_fhp->nfh_len);
 3944         error = nfscl_request(nd, vp, p, cred, NULL);
 3945         if (error)
 3946                 return (error);
 3947         if (nd->nd_repstat == 0) {
 3948                 fl->l_type = F_UNLCK;
 3949         } else if (nd->nd_repstat == NFSERR_DENIED) {
 3950                 nd->nd_repstat = 0;
 3951                 fl->l_whence = SEEK_SET;
 3952                 NFSM_DISSECT(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
 3953                 fl->l_start = fxdr_hyper(tl);
 3954                 tl += 2;
 3955                 len = fxdr_hyper(tl);
 3956                 tl += 2;
 3957                 if (len == NFS64BITSSET)
 3958                         fl->l_len = 0;
 3959                 else
 3960                         fl->l_len = len;
 3961                 type = fxdr_unsigned(int, *tl++);
 3962                 if (type == NFSV4LOCKT_WRITE)
 3963                         fl->l_type = F_WRLCK;
 3964                 else
 3965                         fl->l_type = F_RDLCK;
 3966                 /*
 3967                  * XXX For now, I have no idea what to do with the
 3968                  * conflicting lock_owner, so I'll just set the pid == 0
 3969                  * and skip over the lock_owner.
 3970                  */
 3971                 fl->l_pid = (pid_t)0;
 3972                 tl += 2;
 3973                 size = fxdr_unsigned(int, *tl);
 3974                 if (size < 0 || size > NFSV4_OPAQUELIMIT)
 3975                         error = EBADRPC;
 3976                 if (!error)
 3977                         error = nfsm_advance(nd, NFSM_RNDUP(size), -1);
 3978         } else if (nd->nd_repstat == NFSERR_STALECLIENTID)
 3979                 nfscl_initiate_recovery(clp);
 3980 nfsmout:
 3981         mbuf_freem(nd->nd_mrep);
 3982         return (error);
 3983 }
 3984 
 3985 /*
 3986  * Lower level function that performs the LockU RPC.
 3987  */
 3988 static int
 3989 nfsrpc_locku(struct nfsrv_descript *nd, struct nfsmount *nmp,
 3990     struct nfscllockowner *lp, u_int64_t off, u_int64_t len,
 3991     u_int32_t type, struct ucred *cred, NFSPROC_T *p, int syscred)
 3992 {
 3993         u_int32_t *tl;
 3994         int error;
 3995 
 3996         nfscl_reqstart(nd, NFSPROC_LOCKU, nmp, lp->nfsl_open->nfso_fh,
 3997             lp->nfsl_open->nfso_fhlen, NULL, NULL);
 3998         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + 6 * NFSX_UNSIGNED);
 3999         *tl++ = txdr_unsigned(type);
 4000         *tl = txdr_unsigned(lp->nfsl_seqid);
 4001         if (nfstest_outofseq &&
 4002             (arc4random() % nfstest_outofseq) == 0)
 4003                 *tl = txdr_unsigned(lp->nfsl_seqid + 1);
 4004         tl++;
 4005         if (NFSHASNFSV4N(nmp))
 4006                 *tl++ = 0;
 4007         else
 4008                 *tl++ = lp->nfsl_stateid.seqid;
 4009         *tl++ = lp->nfsl_stateid.other[0];
 4010         *tl++ = lp->nfsl_stateid.other[1];
 4011         *tl++ = lp->nfsl_stateid.other[2];
 4012         txdr_hyper(off, tl);
 4013         tl += 2;
 4014         txdr_hyper(len, tl);
 4015         if (syscred)
 4016                 nd->nd_flag |= ND_USEGSSNAME;
 4017         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4018             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4019         NFSCL_INCRSEQID(lp->nfsl_seqid, nd);
 4020         if (error)
 4021                 return (error);
 4022         if (nd->nd_repstat == 0) {
 4023                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
 4024                 lp->nfsl_stateid.seqid = *tl++;
 4025                 lp->nfsl_stateid.other[0] = *tl++;
 4026                 lp->nfsl_stateid.other[1] = *tl++;
 4027                 lp->nfsl_stateid.other[2] = *tl;
 4028         } else if (nd->nd_repstat == NFSERR_STALESTATEID)
 4029                 nfscl_initiate_recovery(lp->nfsl_open->nfso_own->nfsow_clp);
 4030 nfsmout:
 4031         mbuf_freem(nd->nd_mrep);
 4032         return (error);
 4033 }
 4034 
 4035 /*
 4036  * The actual Lock RPC.
 4037  */
 4038 int
 4039 nfsrpc_lock(struct nfsrv_descript *nd, struct nfsmount *nmp, vnode_t vp,
 4040     u_int8_t *nfhp, int fhlen, struct nfscllockowner *lp, int newone,
 4041     int reclaim, u_int64_t off, u_int64_t len, short type, struct ucred *cred,
 4042     NFSPROC_T *p, int syscred)
 4043 {
 4044         u_int32_t *tl;
 4045         int error, size;
 4046         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 4047         struct nfsclsession *tsep;
 4048 
 4049         nfscl_reqstart(nd, NFSPROC_LOCK, nmp, nfhp, fhlen, NULL, NULL);
 4050         NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
 4051         if (type == F_RDLCK)
 4052                 *tl++ = txdr_unsigned(NFSV4LOCKT_READ);
 4053         else
 4054                 *tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
 4055         *tl++ = txdr_unsigned(reclaim);
 4056         txdr_hyper(off, tl);
 4057         tl += 2;
 4058         txdr_hyper(len, tl);
 4059         tl += 2;
 4060         if (newone) {
 4061             *tl = newnfs_true;
 4062             NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID +
 4063                 2 * NFSX_UNSIGNED + NFSX_HYPER);
 4064             *tl++ = txdr_unsigned(lp->nfsl_open->nfso_own->nfsow_seqid);
 4065             if (NFSHASNFSV4N(nmp))
 4066                 *tl++ = 0;
 4067             else
 4068                 *tl++ = lp->nfsl_open->nfso_stateid.seqid;
 4069             *tl++ = lp->nfsl_open->nfso_stateid.other[0];
 4070             *tl++ = lp->nfsl_open->nfso_stateid.other[1];
 4071             *tl++ = lp->nfsl_open->nfso_stateid.other[2];
 4072             *tl++ = txdr_unsigned(lp->nfsl_seqid);
 4073             tsep = nfsmnt_mdssession(nmp);
 4074             *tl++ = tsep->nfsess_clientid.lval[0];
 4075             *tl = tsep->nfsess_clientid.lval[1];
 4076             NFSBCOPY(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN);
 4077             NFSBCOPY(nfhp, &own[NFSV4CL_LOCKNAMELEN], fhlen);
 4078             (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + fhlen);
 4079         } else {
 4080             *tl = newnfs_false;
 4081             NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + NFSX_UNSIGNED);
 4082             if (NFSHASNFSV4N(nmp))
 4083                 *tl++ = 0;
 4084             else
 4085                 *tl++ = lp->nfsl_stateid.seqid;
 4086             *tl++ = lp->nfsl_stateid.other[0];
 4087             *tl++ = lp->nfsl_stateid.other[1];
 4088             *tl++ = lp->nfsl_stateid.other[2];
 4089             *tl = txdr_unsigned(lp->nfsl_seqid);
 4090             if (nfstest_outofseq &&
 4091                 (arc4random() % nfstest_outofseq) == 0)
 4092                     *tl = txdr_unsigned(lp->nfsl_seqid + 1);
 4093         }
 4094         if (syscred)
 4095                 nd->nd_flag |= ND_USEGSSNAME;
 4096         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
 4097             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4098         if (error)
 4099                 return (error);
 4100         if (newone)
 4101             NFSCL_INCRSEQID(lp->nfsl_open->nfso_own->nfsow_seqid, nd);
 4102         NFSCL_INCRSEQID(lp->nfsl_seqid, nd);
 4103         if (nd->nd_repstat == 0) {
 4104                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
 4105                 lp->nfsl_stateid.seqid = *tl++;
 4106                 lp->nfsl_stateid.other[0] = *tl++;
 4107                 lp->nfsl_stateid.other[1] = *tl++;
 4108                 lp->nfsl_stateid.other[2] = *tl;
 4109         } else if (nd->nd_repstat == NFSERR_DENIED) {
 4110                 NFSM_DISSECT(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
 4111                 size = fxdr_unsigned(int, *(tl + 7));
 4112                 if (size < 0 || size > NFSV4_OPAQUELIMIT)
 4113                         error = EBADRPC;
 4114                 if (!error)
 4115                         error = nfsm_advance(nd, NFSM_RNDUP(size), -1);
 4116         } else if (nd->nd_repstat == NFSERR_STALESTATEID)
 4117                 nfscl_initiate_recovery(lp->nfsl_open->nfso_own->nfsow_clp);
 4118 nfsmout:
 4119         mbuf_freem(nd->nd_mrep);
 4120         return (error);
 4121 }
 4122 
 4123 /*
 4124  * nfs statfs rpc
 4125  * (always called with the vp for the mount point)
 4126  */
 4127 int
 4128 nfsrpc_statfs(vnode_t vp, struct nfsstatfs *sbp, struct nfsfsinfo *fsp,
 4129     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 4130     void *stuff)
 4131 {
 4132         u_int32_t *tl = NULL;
 4133         struct nfsrv_descript nfsd, *nd = &nfsd;
 4134         struct nfsmount *nmp;
 4135         nfsattrbit_t attrbits;
 4136         int error;
 4137 
 4138         *attrflagp = 0;
 4139         nmp = VFSTONFS(vnode_mount(vp));
 4140         if (NFSHASNFSV4(nmp)) {
 4141                 /*
 4142                  * For V4, you actually do a getattr.
 4143                  */
 4144                 NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
 4145                 NFSSTATFS_GETATTRBIT(&attrbits);
 4146                 (void) nfsrv_putattrbit(nd, &attrbits);
 4147                 nd->nd_flag |= ND_USEGSSNAME;
 4148                 error = nfscl_request(nd, vp, p, cred, stuff);
 4149                 if (error)
 4150                         return (error);
 4151                 if (nd->nd_repstat == 0) {
 4152                         error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
 4153                             NULL, NULL, sbp, fsp, NULL, 0, NULL, NULL, NULL, p,
 4154                             cred);
 4155                         if (!error) {
 4156                                 nmp->nm_fsid[0] = nap->na_filesid[0];
 4157                                 nmp->nm_fsid[1] = nap->na_filesid[1];
 4158                                 NFSSETHASSETFSID(nmp);
 4159                                 *attrflagp = 1;
 4160                         }
 4161                 } else {
 4162                         error = nd->nd_repstat;
 4163                 }
 4164                 if (error)
 4165                         goto nfsmout;
 4166         } else {
 4167                 NFSCL_REQSTART(nd, NFSPROC_FSSTAT, vp);
 4168                 error = nfscl_request(nd, vp, p, cred, stuff);
 4169                 if (error)
 4170                         return (error);
 4171                 if (nd->nd_flag & ND_NFSV3) {
 4172                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 4173                         if (error)
 4174                                 goto nfsmout;
 4175                 }
 4176                 if (nd->nd_repstat) {
 4177                         error = nd->nd_repstat;
 4178                         goto nfsmout;
 4179                 }
 4180                 NFSM_DISSECT(tl, u_int32_t *,
 4181                     NFSX_STATFS(nd->nd_flag & ND_NFSV3));
 4182         }
 4183         if (NFSHASNFSV3(nmp)) {
 4184                 sbp->sf_tbytes = fxdr_hyper(tl); tl += 2;
 4185                 sbp->sf_fbytes = fxdr_hyper(tl); tl += 2;
 4186                 sbp->sf_abytes = fxdr_hyper(tl); tl += 2;
 4187                 sbp->sf_tfiles = fxdr_hyper(tl); tl += 2;
 4188                 sbp->sf_ffiles = fxdr_hyper(tl); tl += 2;
 4189                 sbp->sf_afiles = fxdr_hyper(tl); tl += 2;
 4190                 sbp->sf_invarsec = fxdr_unsigned(u_int32_t, *tl);
 4191         } else if (NFSHASNFSV4(nmp) == 0) {
 4192                 sbp->sf_tsize = fxdr_unsigned(u_int32_t, *tl++);
 4193                 sbp->sf_bsize = fxdr_unsigned(u_int32_t, *tl++);
 4194                 sbp->sf_blocks = fxdr_unsigned(u_int32_t, *tl++);
 4195                 sbp->sf_bfree = fxdr_unsigned(u_int32_t, *tl++);
 4196                 sbp->sf_bavail = fxdr_unsigned(u_int32_t, *tl);
 4197         }
 4198 nfsmout:
 4199         mbuf_freem(nd->nd_mrep);
 4200         return (error);
 4201 }
 4202 
 4203 /*
 4204  * nfs pathconf rpc
 4205  */
 4206 int
 4207 nfsrpc_pathconf(vnode_t vp, struct nfsv3_pathconf *pc,
 4208     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 4209     void *stuff)
 4210 {
 4211         struct nfsrv_descript nfsd, *nd = &nfsd;
 4212         struct nfsmount *nmp;
 4213         u_int32_t *tl;
 4214         nfsattrbit_t attrbits;
 4215         int error;
 4216 
 4217         *attrflagp = 0;
 4218         nmp = VFSTONFS(vnode_mount(vp));
 4219         if (NFSHASNFSV4(nmp)) {
 4220                 /*
 4221                  * For V4, you actually do a getattr.
 4222                  */
 4223                 NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
 4224                 NFSPATHCONF_GETATTRBIT(&attrbits);
 4225                 (void) nfsrv_putattrbit(nd, &attrbits);
 4226                 nd->nd_flag |= ND_USEGSSNAME;
 4227                 error = nfscl_request(nd, vp, p, cred, stuff);
 4228                 if (error)
 4229                         return (error);
 4230                 if (nd->nd_repstat == 0) {
 4231                         error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
 4232                             pc, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, p,
 4233                             cred);
 4234                         if (!error)
 4235                                 *attrflagp = 1;
 4236                 } else {
 4237                         error = nd->nd_repstat;
 4238                 }
 4239         } else {
 4240                 NFSCL_REQSTART(nd, NFSPROC_PATHCONF, vp);
 4241                 error = nfscl_request(nd, vp, p, cred, stuff);
 4242                 if (error)
 4243                         return (error);
 4244                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 4245                 if (nd->nd_repstat && !error)
 4246                         error = nd->nd_repstat;
 4247                 if (!error) {
 4248                         NFSM_DISSECT(tl, u_int32_t *, NFSX_V3PATHCONF);
 4249                         pc->pc_linkmax = fxdr_unsigned(u_int32_t, *tl++);
 4250                         pc->pc_namemax = fxdr_unsigned(u_int32_t, *tl++);
 4251                         pc->pc_notrunc = fxdr_unsigned(u_int32_t, *tl++);
 4252                         pc->pc_chownrestricted =
 4253                             fxdr_unsigned(u_int32_t, *tl++);
 4254                         pc->pc_caseinsensitive =
 4255                             fxdr_unsigned(u_int32_t, *tl++);
 4256                         pc->pc_casepreserving = fxdr_unsigned(u_int32_t, *tl);
 4257                 }
 4258         }
 4259 nfsmout:
 4260         mbuf_freem(nd->nd_mrep);
 4261         return (error);
 4262 }
 4263 
 4264 /*
 4265  * nfs version 3 fsinfo rpc call
 4266  */
 4267 int
 4268 nfsrpc_fsinfo(vnode_t vp, struct nfsfsinfo *fsp, struct ucred *cred,
 4269     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 4270 {
 4271         u_int32_t *tl;
 4272         struct nfsrv_descript nfsd, *nd = &nfsd;
 4273         int error;
 4274 
 4275         *attrflagp = 0;
 4276         NFSCL_REQSTART(nd, NFSPROC_FSINFO, vp);
 4277         error = nfscl_request(nd, vp, p, cred, stuff);
 4278         if (error)
 4279                 return (error);
 4280         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 4281         if (nd->nd_repstat && !error)
 4282                 error = nd->nd_repstat;
 4283         if (!error) {
 4284                 NFSM_DISSECT(tl, u_int32_t *, NFSX_V3FSINFO);
 4285                 fsp->fs_rtmax = fxdr_unsigned(u_int32_t, *tl++);
 4286                 fsp->fs_rtpref = fxdr_unsigned(u_int32_t, *tl++);
 4287                 fsp->fs_rtmult = fxdr_unsigned(u_int32_t, *tl++);
 4288                 fsp->fs_wtmax = fxdr_unsigned(u_int32_t, *tl++);
 4289                 fsp->fs_wtpref = fxdr_unsigned(u_int32_t, *tl++);
 4290                 fsp->fs_wtmult = fxdr_unsigned(u_int32_t, *tl++);
 4291                 fsp->fs_dtpref = fxdr_unsigned(u_int32_t, *tl++);
 4292                 fsp->fs_maxfilesize = fxdr_hyper(tl);
 4293                 tl += 2;
 4294                 fxdr_nfsv3time(tl, &fsp->fs_timedelta);
 4295                 tl += 2;
 4296                 fsp->fs_properties = fxdr_unsigned(u_int32_t, *tl);
 4297         }
 4298 nfsmout:
 4299         mbuf_freem(nd->nd_mrep);
 4300         return (error);
 4301 }
 4302 
 4303 /*
 4304  * This function performs the Renew RPC.
 4305  */
 4306 int
 4307 nfsrpc_renew(struct nfsclclient *clp, struct nfsclds *dsp, struct ucred *cred,
 4308     NFSPROC_T *p)
 4309 {
 4310         u_int32_t *tl;
 4311         struct nfsrv_descript nfsd;
 4312         struct nfsrv_descript *nd = &nfsd;
 4313         struct nfsmount *nmp;
 4314         int error;
 4315         struct nfssockreq *nrp;
 4316         struct nfsclsession *tsep;
 4317 
 4318         nmp = clp->nfsc_nmp;
 4319         if (nmp == NULL)
 4320                 return (0);
 4321         if (dsp == NULL)
 4322                 nfscl_reqstart(nd, NFSPROC_RENEW, nmp, NULL, 0, NULL, NULL);
 4323         else
 4324                 nfscl_reqstart(nd, NFSPROC_RENEW, nmp, NULL, 0, NULL,
 4325                     &dsp->nfsclds_sess);
 4326         if (!NFSHASNFSV4N(nmp)) {
 4327                 /* NFSv4.1 just uses a Sequence Op and not a Renew. */
 4328                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 4329                 tsep = nfsmnt_mdssession(nmp);
 4330                 *tl++ = tsep->nfsess_clientid.lval[0];
 4331                 *tl = tsep->nfsess_clientid.lval[1];
 4332         }
 4333         nrp = NULL;
 4334         if (dsp != NULL)
 4335                 nrp = dsp->nfsclds_sockp;
 4336         if (nrp == NULL)
 4337                 /* If NULL, use the MDS socket. */
 4338                 nrp = &nmp->nm_sockreq;
 4339         nd->nd_flag |= ND_USEGSSNAME;
 4340         if (dsp == NULL)
 4341                 error = newnfs_request(nd, nmp, NULL, nrp, NULL, p, cred,
 4342                     NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4343         else
 4344                 error = newnfs_request(nd, nmp, NULL, nrp, NULL, p, cred,
 4345                     NFS_PROG, NFS_VER4, NULL, 1, NULL, &dsp->nfsclds_sess);
 4346         if (error)
 4347                 return (error);
 4348         error = nd->nd_repstat;
 4349         mbuf_freem(nd->nd_mrep);
 4350         return (error);
 4351 }
 4352 
 4353 /*
 4354  * This function performs the Releaselockowner RPC.
 4355  */
 4356 int
 4357 nfsrpc_rellockown(struct nfsmount *nmp, struct nfscllockowner *lp,
 4358     uint8_t *fh, int fhlen, struct ucred *cred, NFSPROC_T *p)
 4359 {
 4360         struct nfsrv_descript nfsd, *nd = &nfsd;
 4361         u_int32_t *tl;
 4362         int error;
 4363         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 4364         struct nfsclsession *tsep;
 4365 
 4366         if (NFSHASNFSV4N(nmp)) {
 4367                 /* For NFSv4.1, do a FreeStateID. */
 4368                 nfscl_reqstart(nd, NFSPROC_FREESTATEID, nmp, NULL, 0, NULL,
 4369                     NULL);
 4370                 nfsm_stateidtom(nd, &lp->nfsl_stateid, NFSSTATEID_PUTSTATEID);
 4371         } else {
 4372                 nfscl_reqstart(nd, NFSPROC_RELEASELCKOWN, nmp, NULL, 0, NULL,
 4373                     NULL);
 4374                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 4375                 tsep = nfsmnt_mdssession(nmp);
 4376                 *tl++ = tsep->nfsess_clientid.lval[0];
 4377                 *tl = tsep->nfsess_clientid.lval[1];
 4378                 NFSBCOPY(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN);
 4379                 NFSBCOPY(fh, &own[NFSV4CL_LOCKNAMELEN], fhlen);
 4380                 (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + fhlen);
 4381         }
 4382         nd->nd_flag |= ND_USEGSSNAME;
 4383         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4384             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4385         if (error)
 4386                 return (error);
 4387         error = nd->nd_repstat;
 4388         mbuf_freem(nd->nd_mrep);
 4389         return (error);
 4390 }
 4391 
 4392 /*
 4393  * This function performs the Compound to get the mount pt FH.
 4394  */
 4395 int
 4396 nfsrpc_getdirpath(struct nfsmount *nmp, u_char *dirpath, struct ucred *cred,
 4397     NFSPROC_T *p)
 4398 {
 4399         u_int32_t *tl;
 4400         struct nfsrv_descript nfsd;
 4401         struct nfsrv_descript *nd = &nfsd;
 4402         u_char *cp, *cp2;
 4403         int error, cnt, len, setnil;
 4404         u_int32_t *opcntp;
 4405 
 4406         nfscl_reqstart(nd, NFSPROC_PUTROOTFH, nmp, NULL, 0, &opcntp, NULL);
 4407         cp = dirpath;
 4408         cnt = 0;
 4409         do {
 4410                 setnil = 0;
 4411                 while (*cp == '/')
 4412                         cp++;
 4413                 cp2 = cp;
 4414                 while (*cp2 != '\0' && *cp2 != '/')
 4415                         cp2++;
 4416                 if (*cp2 == '/') {
 4417                         setnil = 1;
 4418                         *cp2 = '\0';
 4419                 }
 4420                 if (cp2 != cp) {
 4421                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 4422                         *tl = txdr_unsigned(NFSV4OP_LOOKUP);
 4423                         nfsm_strtom(nd, cp, strlen(cp));
 4424                         cnt++;
 4425                 }
 4426                 if (setnil)
 4427                         *cp2++ = '/';
 4428                 cp = cp2;
 4429         } while (*cp != '\0');
 4430         if (NFSHASNFSV4N(nmp))
 4431                 /* Has a Sequence Op done by nfscl_reqstart(). */
 4432                 *opcntp = txdr_unsigned(3 + cnt);
 4433         else
 4434                 *opcntp = txdr_unsigned(2 + cnt);
 4435         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 4436         *tl = txdr_unsigned(NFSV4OP_GETFH);
 4437         nd->nd_flag |= ND_USEGSSNAME;
 4438         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4439                 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4440         if (error)
 4441                 return (error);
 4442         if (nd->nd_repstat == 0) {
 4443                 NFSM_DISSECT(tl, u_int32_t *, (3 + 2 * cnt) * NFSX_UNSIGNED);
 4444                 tl += (2 + 2 * cnt);
 4445                 if ((len = fxdr_unsigned(int, *tl)) <= 0 ||
 4446                         len > NFSX_FHMAX) {
 4447                         nd->nd_repstat = NFSERR_BADXDR;
 4448                 } else {
 4449                         nd->nd_repstat = nfsrv_mtostr(nd, nmp->nm_fh, len);
 4450                         if (nd->nd_repstat == 0)
 4451                                 nmp->nm_fhsize = len;
 4452                 }
 4453         }
 4454         error = nd->nd_repstat;
 4455 nfsmout:
 4456         mbuf_freem(nd->nd_mrep);
 4457         return (error);
 4458 }
 4459 
 4460 /*
 4461  * This function performs the Delegreturn RPC.
 4462  */
 4463 int
 4464 nfsrpc_delegreturn(struct nfscldeleg *dp, struct ucred *cred,
 4465     struct nfsmount *nmp, NFSPROC_T *p, int syscred)
 4466 {
 4467         u_int32_t *tl;
 4468         struct nfsrv_descript nfsd;
 4469         struct nfsrv_descript *nd = &nfsd;
 4470         int error;
 4471 
 4472         nfscl_reqstart(nd, NFSPROC_DELEGRETURN, nmp, dp->nfsdl_fh,
 4473             dp->nfsdl_fhlen, NULL, NULL);
 4474         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 4475         if (NFSHASNFSV4N(nmp))
 4476                 *tl++ = 0;
 4477         else
 4478                 *tl++ = dp->nfsdl_stateid.seqid;
 4479         *tl++ = dp->nfsdl_stateid.other[0];
 4480         *tl++ = dp->nfsdl_stateid.other[1];
 4481         *tl = dp->nfsdl_stateid.other[2];
 4482         if (syscred)
 4483                 nd->nd_flag |= ND_USEGSSNAME;
 4484         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4485             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4486         if (error)
 4487                 return (error);
 4488         error = nd->nd_repstat;
 4489         mbuf_freem(nd->nd_mrep);
 4490         return (error);
 4491 }
 4492 
 4493 /*
 4494  * nfs getacl call.
 4495  */
 4496 int
 4497 nfsrpc_getacl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4498     struct acl *aclp, void *stuff)
 4499 {
 4500         struct nfsrv_descript nfsd, *nd = &nfsd;
 4501         int error;
 4502         nfsattrbit_t attrbits;
 4503         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4504         
 4505         if (nfsrv_useacl == 0 || !NFSHASNFSV4(nmp))
 4506                 return (EOPNOTSUPP);
 4507         NFSCL_REQSTART(nd, NFSPROC_GETACL, vp);
 4508         NFSZERO_ATTRBIT(&attrbits);
 4509         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL);
 4510         (void) nfsrv_putattrbit(nd, &attrbits);
 4511         error = nfscl_request(nd, vp, p, cred, stuff);
 4512         if (error)
 4513                 return (error);
 4514         if (!nd->nd_repstat)
 4515                 error = nfsv4_loadattr(nd, vp, NULL, NULL, NULL, 0, NULL,
 4516                     NULL, NULL, NULL, aclp, 0, NULL, NULL, NULL, p, cred);
 4517         else
 4518                 error = nd->nd_repstat;
 4519         mbuf_freem(nd->nd_mrep);
 4520         return (error);
 4521 }
 4522 
 4523 /*
 4524  * nfs setacl call.
 4525  */
 4526 int
 4527 nfsrpc_setacl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4528     struct acl *aclp, void *stuff)
 4529 {
 4530         int error;
 4531         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4532         
 4533         if (nfsrv_useacl == 0 || !NFSHASNFSV4(nmp))
 4534                 return (EOPNOTSUPP);
 4535         error = nfsrpc_setattr(vp, NULL, aclp, cred, p, NULL, NULL, stuff);
 4536         return (error);
 4537 }
 4538 
 4539 /*
 4540  * nfs setacl call.
 4541  */
 4542 static int
 4543 nfsrpc_setaclrpc(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4544     struct acl *aclp, nfsv4stateid_t *stateidp, void *stuff)
 4545 {
 4546         struct nfsrv_descript nfsd, *nd = &nfsd;
 4547         int error;
 4548         nfsattrbit_t attrbits;
 4549         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4550         
 4551         if (!NFSHASNFSV4(nmp))
 4552                 return (EOPNOTSUPP);
 4553         NFSCL_REQSTART(nd, NFSPROC_SETACL, vp);
 4554         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 4555         NFSZERO_ATTRBIT(&attrbits);
 4556         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL);
 4557         (void) nfsv4_fillattr(nd, vnode_mount(vp), vp, aclp, NULL, NULL, 0,
 4558             &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0);
 4559         error = nfscl_request(nd, vp, p, cred, stuff);
 4560         if (error)
 4561                 return (error);
 4562         /* Don't care about the pre/postop attributes */
 4563         mbuf_freem(nd->nd_mrep);
 4564         return (nd->nd_repstat);
 4565 }
 4566 
 4567 /*
 4568  * Do the NFSv4.1 Exchange ID.
 4569  */
 4570 int
 4571 nfsrpc_exchangeid(struct nfsmount *nmp, struct nfsclclient *clp,
 4572     struct nfssockreq *nrp, uint32_t exchflags, struct nfsclds **dspp,
 4573     struct ucred *cred, NFSPROC_T *p)
 4574 {
 4575         uint32_t *tl, v41flags;
 4576         struct nfsrv_descript nfsd;
 4577         struct nfsrv_descript *nd = &nfsd;
 4578         struct nfsclds *dsp;
 4579         struct timespec verstime;
 4580         int error, len;
 4581 
 4582         *dspp = NULL;
 4583         nfscl_reqstart(nd, NFSPROC_EXCHANGEID, nmp, NULL, 0, NULL, NULL);
 4584         NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
 4585         *tl++ = txdr_unsigned(nfsboottime.tv_sec);      /* Client owner */
 4586         *tl = txdr_unsigned(clp->nfsc_rev);
 4587         (void) nfsm_strtom(nd, clp->nfsc_id, clp->nfsc_idlen);
 4588 
 4589         NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED);
 4590         *tl++ = txdr_unsigned(exchflags);
 4591         *tl++ = txdr_unsigned(NFSV4EXCH_SP4NONE);
 4592 
 4593         /* Set the implementation id4 */
 4594         *tl = txdr_unsigned(1);
 4595         (void) nfsm_strtom(nd, "freebsd.org", strlen("freebsd.org"));
 4596         (void) nfsm_strtom(nd, version, strlen(version));
 4597         NFSM_BUILD(tl, uint32_t *, NFSX_V4TIME);
 4598         verstime.tv_sec = 1293840000;           /* Jan 1, 2011 */
 4599         verstime.tv_nsec = 0;
 4600         txdr_nfsv4time(&verstime, tl);
 4601         nd->nd_flag |= ND_USEGSSNAME;
 4602         error = newnfs_request(nd, nmp, NULL, nrp, NULL, p, cred,
 4603             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4604         NFSCL_DEBUG(1, "exchangeid err=%d reps=%d\n", error,
 4605             (int)nd->nd_repstat);
 4606         if (error != 0)
 4607                 return (error);
 4608         if (nd->nd_repstat == 0) {
 4609                 NFSM_DISSECT(tl, uint32_t *, 6 * NFSX_UNSIGNED + NFSX_HYPER);
 4610                 len = fxdr_unsigned(int, *(tl + 7));
 4611                 if (len < 0 || len > NFSV4_OPAQUELIMIT) {
 4612                         error = NFSERR_BADXDR;
 4613                         goto nfsmout;
 4614                 }
 4615                 dsp = malloc(sizeof(struct nfsclds) + len + 1, M_NFSCLDS,
 4616                     M_WAITOK | M_ZERO);
 4617                 dsp->nfsclds_expire = NFSD_MONOSEC + clp->nfsc_renew;
 4618                 dsp->nfsclds_servownlen = len;
 4619                 dsp->nfsclds_sess.nfsess_clientid.lval[0] = *tl++;
 4620                 dsp->nfsclds_sess.nfsess_clientid.lval[1] = *tl++;
 4621                 dsp->nfsclds_sess.nfsess_sequenceid =
 4622                     fxdr_unsigned(uint32_t, *tl++);
 4623                 v41flags = fxdr_unsigned(uint32_t, *tl);
 4624                 if ((v41flags & NFSV4EXCH_USEPNFSMDS) != 0 &&
 4625                     NFSHASPNFSOPT(nmp)) {
 4626                         NFSCL_DEBUG(1, "set PNFS\n");
 4627                         NFSLOCKMNT(nmp);
 4628                         nmp->nm_state |= NFSSTA_PNFS;
 4629                         NFSUNLOCKMNT(nmp);
 4630                         dsp->nfsclds_flags |= NFSCLDS_MDS;
 4631                 }
 4632                 if ((v41flags & NFSV4EXCH_USEPNFSDS) != 0)
 4633                         dsp->nfsclds_flags |= NFSCLDS_DS;
 4634                 if (len > 0)
 4635                         nd->nd_repstat = nfsrv_mtostr(nd,
 4636                             dsp->nfsclds_serverown, len);
 4637                 if (nd->nd_repstat == 0) {
 4638                         mtx_init(&dsp->nfsclds_mtx, "nfsds", NULL, MTX_DEF);
 4639                         mtx_init(&dsp->nfsclds_sess.nfsess_mtx, "nfssession",
 4640                             NULL, MTX_DEF);
 4641                         nfscl_initsessionslots(&dsp->nfsclds_sess);
 4642                         *dspp = dsp;
 4643                 } else
 4644                         free(dsp, M_NFSCLDS);
 4645         }
 4646         error = nd->nd_repstat;
 4647 nfsmout:
 4648         mbuf_freem(nd->nd_mrep);
 4649         return (error);
 4650 }
 4651 
 4652 /*
 4653  * Do the NFSv4.1 Create Session.
 4654  */
 4655 int
 4656 nfsrpc_createsession(struct nfsmount *nmp, struct nfsclsession *sep,
 4657     struct nfssockreq *nrp, uint32_t sequenceid, int mds, struct ucred *cred,
 4658     NFSPROC_T *p)
 4659 {
 4660         uint32_t crflags, maxval, *tl;
 4661         struct nfsrv_descript nfsd;
 4662         struct nfsrv_descript *nd = &nfsd;
 4663         int error, irdcnt;
 4664 
 4665         /* Make sure nm_rsize, nm_wsize is set. */
 4666         if (nmp->nm_rsize > NFS_MAXBSIZE || nmp->nm_rsize == 0)
 4667                 nmp->nm_rsize = NFS_MAXBSIZE;
 4668         if (nmp->nm_wsize > NFS_MAXBSIZE || nmp->nm_wsize == 0)
 4669                 nmp->nm_wsize = NFS_MAXBSIZE;
 4670         nfscl_reqstart(nd, NFSPROC_CREATESESSION, nmp, NULL, 0, NULL, NULL);
 4671         NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED);
 4672         *tl++ = sep->nfsess_clientid.lval[0];
 4673         *tl++ = sep->nfsess_clientid.lval[1];
 4674         *tl++ = txdr_unsigned(sequenceid);
 4675         crflags = (NFSMNT_RDONLY(nmp->nm_mountp) ? 0 : NFSV4CRSESS_PERSIST);
 4676         if (nfscl_enablecallb != 0 && nfs_numnfscbd > 0 && mds != 0)
 4677                 crflags |= NFSV4CRSESS_CONNBACKCHAN;
 4678         *tl = txdr_unsigned(crflags);
 4679 
 4680         /* Fill in fore channel attributes. */
 4681         NFSM_BUILD(tl, uint32_t *, 7 * NFSX_UNSIGNED);
 4682         *tl++ = 0;                              /* Header pad size */
 4683         *tl++ = txdr_unsigned(nmp->nm_wsize + NFS_MAXXDR);/* Max request size */
 4684         *tl++ = txdr_unsigned(nmp->nm_rsize + NFS_MAXXDR);/* Max reply size */
 4685         *tl++ = txdr_unsigned(4096);            /* Max response size cached */
 4686         *tl++ = txdr_unsigned(20);              /* Max operations */
 4687         *tl++ = txdr_unsigned(64);              /* Max slots */
 4688         *tl = 0;                                /* No rdma ird */
 4689 
 4690         /* Fill in back channel attributes. */
 4691         NFSM_BUILD(tl, uint32_t *, 7 * NFSX_UNSIGNED);
 4692         *tl++ = 0;                              /* Header pad size */
 4693         *tl++ = txdr_unsigned(10000);           /* Max request size */
 4694         *tl++ = txdr_unsigned(10000);           /* Max response size */
 4695         *tl++ = txdr_unsigned(4096);            /* Max response size cached */
 4696         *tl++ = txdr_unsigned(4);               /* Max operations */
 4697         *tl++ = txdr_unsigned(NFSV4_CBSLOTS);   /* Max slots */
 4698         *tl = 0;                                /* No rdma ird */
 4699 
 4700         NFSM_BUILD(tl, uint32_t *, 8 * NFSX_UNSIGNED);
 4701         *tl++ = txdr_unsigned(NFS_CALLBCKPROG); /* Call back prog # */
 4702 
 4703         /* Allow AUTH_SYS callbacks as uid, gid == 0. */
 4704         *tl++ = txdr_unsigned(1);               /* Auth_sys only */
 4705         *tl++ = txdr_unsigned(AUTH_SYS);        /* AUTH_SYS type */
 4706         *tl++ = txdr_unsigned(nfsboottime.tv_sec); /* time stamp */
 4707         *tl++ = 0;                              /* Null machine name */
 4708         *tl++ = 0;                              /* Uid == 0 */
 4709         *tl++ = 0;                              /* Gid == 0 */
 4710         *tl = 0;                                /* No additional gids */
 4711         nd->nd_flag |= ND_USEGSSNAME;
 4712         error = newnfs_request(nd, nmp, NULL, nrp, NULL, p, cred, NFS_PROG,
 4713             NFS_VER4, NULL, 1, NULL, NULL);
 4714         if (error != 0)
 4715                 return (error);
 4716         if (nd->nd_repstat == 0) {
 4717                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
 4718                     2 * NFSX_UNSIGNED);
 4719                 bcopy(tl, sep->nfsess_sessionid, NFSX_V4SESSIONID);
 4720                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
 4721                 sep->nfsess_sequenceid = fxdr_unsigned(uint32_t, *tl++);
 4722                 crflags = fxdr_unsigned(uint32_t, *tl);
 4723                 if ((crflags & NFSV4CRSESS_PERSIST) != 0 && mds != 0) {
 4724                         NFSLOCKMNT(nmp);
 4725                         nmp->nm_state |= NFSSTA_SESSPERSIST;
 4726                         NFSUNLOCKMNT(nmp);
 4727                 }
 4728 
 4729                 /* Get the fore channel slot count. */
 4730                 NFSM_DISSECT(tl, uint32_t *, 7 * NFSX_UNSIGNED);
 4731                 tl++;                   /* Skip the header pad size. */
 4732 
 4733                 /* Make sure nm_wsize is small enough. */
 4734                 maxval = fxdr_unsigned(uint32_t, *tl++);
 4735                 while (maxval < nmp->nm_wsize + NFS_MAXXDR) {
 4736                         if (nmp->nm_wsize > 8096)
 4737                                 nmp->nm_wsize /= 2;
 4738                         else
 4739                                 break;
 4740                 }
 4741 
 4742                 /* Make sure nm_rsize is small enough. */
 4743                 maxval = fxdr_unsigned(uint32_t, *tl++);
 4744                 while (maxval < nmp->nm_rsize + NFS_MAXXDR) {
 4745                         if (nmp->nm_rsize > 8096)
 4746                                 nmp->nm_rsize /= 2;
 4747                         else
 4748                                 break;
 4749                 }
 4750 
 4751                 sep->nfsess_maxcache = fxdr_unsigned(int, *tl++);
 4752                 tl++;
 4753                 sep->nfsess_foreslots = fxdr_unsigned(uint16_t, *tl++);
 4754                 NFSCL_DEBUG(4, "fore slots=%d\n", (int)sep->nfsess_foreslots);
 4755                 irdcnt = fxdr_unsigned(int, *tl);
 4756                 if (irdcnt > 0)
 4757                         NFSM_DISSECT(tl, uint32_t *, irdcnt * NFSX_UNSIGNED);
 4758 
 4759                 /* and the back channel slot count. */
 4760                 NFSM_DISSECT(tl, uint32_t *, 7 * NFSX_UNSIGNED);
 4761                 tl += 5;
 4762                 sep->nfsess_backslots = fxdr_unsigned(uint16_t, *tl);
 4763                 NFSCL_DEBUG(4, "back slots=%d\n", (int)sep->nfsess_backslots);
 4764         }
 4765         error = nd->nd_repstat;
 4766 nfsmout:
 4767         mbuf_freem(nd->nd_mrep);
 4768         return (error);
 4769 }
 4770 
 4771 /*
 4772  * Do the NFSv4.1 Destroy Session.
 4773  */
 4774 int
 4775 nfsrpc_destroysession(struct nfsmount *nmp, struct nfsclclient *clp,
 4776     struct ucred *cred, NFSPROC_T *p)
 4777 {
 4778         uint32_t *tl;
 4779         struct nfsrv_descript nfsd;
 4780         struct nfsrv_descript *nd = &nfsd;
 4781         int error;
 4782         struct nfsclsession *tsep;
 4783 
 4784         nfscl_reqstart(nd, NFSPROC_DESTROYSESSION, nmp, NULL, 0, NULL, NULL);
 4785         NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID);
 4786         tsep = nfsmnt_mdssession(nmp);
 4787         bcopy(tsep->nfsess_sessionid, tl, NFSX_V4SESSIONID);
 4788         nd->nd_flag |= ND_USEGSSNAME;
 4789         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4790             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4791         if (error != 0)
 4792                 return (error);
 4793         error = nd->nd_repstat;
 4794         mbuf_freem(nd->nd_mrep);
 4795         return (error);
 4796 }
 4797 
 4798 /*
 4799  * Do the NFSv4.1 Destroy Client.
 4800  */
 4801 int
 4802 nfsrpc_destroyclient(struct nfsmount *nmp, struct nfsclclient *clp,
 4803     struct ucred *cred, NFSPROC_T *p)
 4804 {
 4805         uint32_t *tl;
 4806         struct nfsrv_descript nfsd;
 4807         struct nfsrv_descript *nd = &nfsd;
 4808         int error;
 4809         struct nfsclsession *tsep;
 4810 
 4811         nfscl_reqstart(nd, NFSPROC_DESTROYCLIENT, nmp, NULL, 0, NULL, NULL);
 4812         NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
 4813         tsep = nfsmnt_mdssession(nmp);
 4814         *tl++ = tsep->nfsess_clientid.lval[0];
 4815         *tl = tsep->nfsess_clientid.lval[1];
 4816         nd->nd_flag |= ND_USEGSSNAME;
 4817         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4818             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4819         if (error != 0)
 4820                 return (error);
 4821         error = nd->nd_repstat;
 4822         mbuf_freem(nd->nd_mrep);
 4823         return (error);
 4824 }
 4825 
 4826 /*
 4827  * Do the NFSv4.1 LayoutGet.
 4828  */
 4829 int
 4830 nfsrpc_layoutget(struct nfsmount *nmp, uint8_t *fhp, int fhlen, int iomode,
 4831     uint64_t offset, uint64_t len, uint64_t minlen, int layoutlen,
 4832     nfsv4stateid_t *stateidp, int *retonclosep, struct nfsclflayouthead *flhp,
 4833     struct ucred *cred, NFSPROC_T *p, void *stuff)
 4834 {
 4835         struct nfsrv_descript nfsd, *nd = &nfsd;
 4836         int error;
 4837 
 4838         nfscl_reqstart(nd, NFSPROC_LAYOUTGET, nmp, fhp, fhlen, NULL, NULL);
 4839         nfsrv_setuplayoutget(nd, iomode, offset, len, minlen, stateidp,
 4840             layoutlen, 0);
 4841         nd->nd_flag |= ND_USEGSSNAME;
 4842         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4843             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4844         NFSCL_DEBUG(4, "layget err=%d st=%d\n", error, nd->nd_repstat);
 4845         if (error != 0)
 4846                 return (error);
 4847         if (nd->nd_repstat == 0)
 4848                 error = nfsrv_parselayoutget(nd, stateidp, retonclosep, flhp);
 4849         if (error == 0 && nd->nd_repstat != 0)
 4850                 error = nd->nd_repstat;
 4851         mbuf_freem(nd->nd_mrep);
 4852         return (error);
 4853 }
 4854 
 4855 /*
 4856  * Do the NFSv4.1 Get Device Info.
 4857  */
 4858 int
 4859 nfsrpc_getdeviceinfo(struct nfsmount *nmp, uint8_t *deviceid, int layouttype,
 4860     uint32_t *notifybitsp, struct nfscldevinfo **ndip, struct ucred *cred,
 4861     NFSPROC_T *p)
 4862 {
 4863         uint32_t cnt, *tl;
 4864         struct nfsrv_descript nfsd;
 4865         struct nfsrv_descript *nd = &nfsd;
 4866         struct sockaddr_storage ss;
 4867         struct nfsclds *dsp = NULL, **dspp;
 4868         struct nfscldevinfo *ndi;
 4869         int addrcnt, bitcnt, error, i, isudp, j, pos, safilled, stripecnt;
 4870         uint8_t stripeindex;
 4871 
 4872         *ndip = NULL;
 4873         ndi = NULL;
 4874         nfscl_reqstart(nd, NFSPROC_GETDEVICEINFO, nmp, NULL, 0, NULL, NULL);
 4875         NFSM_BUILD(tl, uint32_t *, NFSX_V4DEVICEID + 3 * NFSX_UNSIGNED);
 4876         NFSBCOPY(deviceid, tl, NFSX_V4DEVICEID);
 4877         tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
 4878         *tl++ = txdr_unsigned(layouttype);
 4879         *tl++ = txdr_unsigned(100000);
 4880         if (notifybitsp != NULL && *notifybitsp != 0) {
 4881                 *tl = txdr_unsigned(1);         /* One word of bits. */
 4882                 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
 4883                 *tl = txdr_unsigned(*notifybitsp);
 4884         } else
 4885                 *tl = txdr_unsigned(0);
 4886         nd->nd_flag |= ND_USEGSSNAME;
 4887         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4888             NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL);
 4889         if (error != 0)
 4890                 return (error);
 4891         if (nd->nd_repstat == 0) {
 4892                 NFSM_DISSECT(tl, uint32_t *, 3 * NFSX_UNSIGNED);
 4893                 if (layouttype != fxdr_unsigned(int, *tl++))
 4894                         printf("EEK! devinfo layout type not same!\n");
 4895                 stripecnt = fxdr_unsigned(int, *++tl);
 4896                 NFSCL_DEBUG(4, "stripecnt=%d\n", stripecnt);
 4897                 if (stripecnt < 1 || stripecnt > 4096) {
 4898                         printf("NFS devinfo stripecnt %d: out of range\n",
 4899                             stripecnt);
 4900                         error = NFSERR_BADXDR;
 4901                         goto nfsmout;
 4902                 }
 4903                 NFSM_DISSECT(tl, uint32_t *, (stripecnt + 1) * NFSX_UNSIGNED);
 4904                 addrcnt = fxdr_unsigned(int, *(tl + stripecnt));
 4905                 NFSCL_DEBUG(4, "addrcnt=%d\n", addrcnt);
 4906                 if (addrcnt < 1 || addrcnt > 128) {
 4907                         printf("NFS devinfo addrcnt %d: out of range\n",
 4908                             addrcnt);
 4909                         error = NFSERR_BADXDR;
 4910                         goto nfsmout;
 4911                 }
 4912 
 4913                 /*
 4914                  * Now we know how many stripe indices and addresses, so
 4915                  * we can allocate the structure the correct size.
 4916                  */
 4917                 i = (stripecnt * sizeof(uint8_t)) / sizeof(struct nfsclds *)
 4918                     + 1;
 4919                 NFSCL_DEBUG(4, "stripeindices=%d\n", i);
 4920                 ndi = malloc(sizeof(*ndi) + (addrcnt + i) *
 4921                     sizeof(struct nfsclds *), M_NFSDEVINFO, M_WAITOK | M_ZERO);
 4922                 NFSBCOPY(deviceid, ndi->nfsdi_deviceid, NFSX_V4DEVICEID);
 4923                 ndi->nfsdi_refcnt = 0;
 4924                 ndi->nfsdi_stripecnt = stripecnt;
 4925                 ndi->nfsdi_addrcnt = addrcnt;
 4926                 /* Fill in the stripe indices. */
 4927                 for (i = 0; i < stripecnt; i++) {
 4928                         stripeindex = fxdr_unsigned(uint8_t, *tl++);
 4929                         NFSCL_DEBUG(4, "stripeind=%d\n", stripeindex);
 4930                         if (stripeindex >= addrcnt) {
 4931                                 printf("NFS devinfo stripeindex %d: too big\n",
 4932                                     (int)stripeindex);
 4933