The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: 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: releng/9.2/sys/fs/nfsclient/nfs_clrpcops.c 246285 2013-02-03 14:24:52Z kib $");
   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 #ifndef APPLEKEXT
   46 #include "opt_inet6.h"
   47 
   48 #include <fs/nfs/nfsport.h>
   49 
   50 /*
   51  * Global variables
   52  */
   53 extern int nfs_numnfscbd;
   54 extern struct timeval nfsboottime;
   55 extern u_int32_t newnfs_false, newnfs_true;
   56 extern nfstype nfsv34_type[9];
   57 extern int nfsrv_useacl;
   58 extern char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
   59 extern int nfscl_debuglevel;
   60 NFSCLSTATEMUTEX;
   61 int nfstest_outofseq = 0;
   62 int nfscl_assumeposixlocks = 1;
   63 int nfscl_enablecallb = 0;
   64 short nfsv4_cbport = NFSV4_CBPORT;
   65 int nfstest_openallsetattr = 0;
   66 #endif  /* !APPLEKEXT */
   67 
   68 #define DIRHDSIZ        (sizeof (struct dirent) - (MAXNAMLEN + 1))
   69 
   70 static int nfsrpc_setattrrpc(vnode_t , struct vattr *, nfsv4stateid_t *,
   71     struct ucred *, NFSPROC_T *, struct nfsvattr *, int *, void *);
   72 static int nfsrpc_readrpc(vnode_t , struct uio *, struct ucred *,
   73     nfsv4stateid_t *, NFSPROC_T *, struct nfsvattr *, int *, void *);
   74 static int nfsrpc_writerpc(vnode_t , struct uio *, int *, int *,
   75     struct ucred *, nfsv4stateid_t *, NFSPROC_T *, struct nfsvattr *, int *,
   76     void *);
   77 static int nfsrpc_createv23(vnode_t , char *, int, struct vattr *,
   78     nfsquad_t, int, struct ucred *, NFSPROC_T *, struct nfsvattr *,
   79     struct nfsvattr *, struct nfsfh **, int *, int *, void *);
   80 static int nfsrpc_createv4(vnode_t , char *, int, struct vattr *,
   81     nfsquad_t, int, struct nfsclowner *, struct nfscldeleg **, struct ucred *,
   82     NFSPROC_T *, struct nfsvattr *, struct nfsvattr *, struct nfsfh **, int *,
   83     int *, void *, int *);
   84 static int nfsrpc_locku(struct nfsrv_descript *, struct nfsmount *,
   85     struct nfscllockowner *, u_int64_t, u_int64_t,
   86     u_int32_t, struct ucred *, NFSPROC_T *, int);
   87 static int nfsrpc_setaclrpc(vnode_t, struct ucred *, NFSPROC_T *,
   88     struct acl *, nfsv4stateid_t *, void *);
   89 
   90 /*
   91  * nfs null call from vfs.
   92  */
   93 APPLESTATIC int
   94 nfsrpc_null(vnode_t vp, struct ucred *cred, NFSPROC_T *p)
   95 {
   96         int error;
   97         struct nfsrv_descript nfsd, *nd = &nfsd;
   98         
   99         NFSCL_REQSTART(nd, NFSPROC_NULL, vp);
  100         error = nfscl_request(nd, vp, p, cred, NULL);
  101         if (nd->nd_repstat && !error)
  102                 error = nd->nd_repstat;
  103         mbuf_freem(nd->nd_mrep);
  104         return (error);
  105 }
  106 
  107 /*
  108  * nfs access rpc op.
  109  * For nfs version 3 and 4, use the access rpc to check accessibility. If file
  110  * modes are changed on the server, accesses might still fail later.
  111  */
  112 APPLESTATIC int
  113 nfsrpc_access(vnode_t vp, int acmode, struct ucred *cred,
  114     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp)
  115 {
  116         int error;
  117         u_int32_t mode, rmode;
  118 
  119         if (acmode & VREAD)
  120                 mode = NFSACCESS_READ;
  121         else
  122                 mode = 0;
  123         if (vnode_vtype(vp) == VDIR) {
  124                 if (acmode & VWRITE)
  125                         mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND |
  126                                  NFSACCESS_DELETE);
  127                 if (acmode & VEXEC)
  128                         mode |= NFSACCESS_LOOKUP;
  129         } else {
  130                 if (acmode & VWRITE)
  131                         mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
  132                 if (acmode & VEXEC)
  133                         mode |= NFSACCESS_EXECUTE;
  134         }
  135 
  136         /*
  137          * Now, just call nfsrpc_accessrpc() to do the actual RPC.
  138          */
  139         error = nfsrpc_accessrpc(vp, mode, cred, p, nap, attrflagp, &rmode,
  140             NULL);
  141 
  142         /*
  143          * The NFS V3 spec does not clarify whether or not
  144          * the returned access bits can be a superset of
  145          * the ones requested, so...
  146          */
  147         if (!error && (rmode & mode) != mode)
  148                 error = EACCES;
  149         return (error);
  150 }
  151 
  152 /*
  153  * The actual rpc, separated out for Darwin.
  154  */
  155 APPLESTATIC int
  156 nfsrpc_accessrpc(vnode_t vp, u_int32_t mode, struct ucred *cred,
  157     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, u_int32_t *rmodep,
  158     void *stuff)
  159 {
  160         u_int32_t *tl;
  161         u_int32_t supported, rmode;
  162         int error;
  163         struct nfsrv_descript nfsd, *nd = &nfsd;
  164         nfsattrbit_t attrbits;
  165 
  166         *attrflagp = 0;
  167         supported = mode;
  168         NFSCL_REQSTART(nd, NFSPROC_ACCESS, vp);
  169         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  170         *tl = txdr_unsigned(mode);
  171         if (nd->nd_flag & ND_NFSV4) {
  172                 /*
  173                  * And do a Getattr op.
  174                  */
  175                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  176                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
  177                 NFSGETATTR_ATTRBIT(&attrbits);
  178                 (void) nfsrv_putattrbit(nd, &attrbits);
  179         }
  180         error = nfscl_request(nd, vp, p, cred, stuff);
  181         if (error)
  182                 return (error);
  183         if (nd->nd_flag & ND_NFSV3) {
  184                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
  185                 if (error)
  186                         goto nfsmout;
  187         }
  188         if (!nd->nd_repstat) {
  189                 if (nd->nd_flag & ND_NFSV4) {
  190                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  191                         supported = fxdr_unsigned(u_int32_t, *tl++);
  192                 } else {
  193                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
  194                 }
  195                 rmode = fxdr_unsigned(u_int32_t, *tl);
  196                 if (nd->nd_flag & ND_NFSV4)
  197                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
  198 
  199                 /*
  200                  * It's not obvious what should be done about
  201                  * unsupported access modes. For now, be paranoid
  202                  * and clear the unsupported ones.
  203                  */
  204                 rmode &= supported;
  205                 *rmodep = rmode;
  206         } else
  207                 error = nd->nd_repstat;
  208 nfsmout:
  209         mbuf_freem(nd->nd_mrep);
  210         return (error);
  211 }
  212 
  213 /*
  214  * nfs open rpc
  215  */
  216 APPLESTATIC int
  217 nfsrpc_open(vnode_t vp, int amode, struct ucred *cred, NFSPROC_T *p)
  218 {
  219         struct nfsclopen *op;
  220         struct nfscldeleg *dp;
  221         struct nfsfh *nfhp;
  222         struct nfsnode *np = VTONFS(vp);
  223         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
  224         u_int32_t mode, clidrev;
  225         int ret, newone, error, expireret = 0, retrycnt;
  226 
  227         /*
  228          * For NFSv4, Open Ops are only done on Regular Files.
  229          */
  230         if (vnode_vtype(vp) != VREG)
  231                 return (0);
  232         mode = 0;
  233         if (amode & FREAD)
  234                 mode |= NFSV4OPEN_ACCESSREAD;
  235         if (amode & FWRITE)
  236                 mode |= NFSV4OPEN_ACCESSWRITE;
  237         nfhp = np->n_fhp;
  238 
  239         retrycnt = 0;
  240 #ifdef notdef
  241 { char name[100]; int namel;
  242 namel = (np->n_v4->n4_namelen < 100) ? np->n_v4->n4_namelen : 99;
  243 bcopy(NFS4NODENAME(np->n_v4), name, namel);
  244 name[namel] = '\0';
  245 printf("rpcopen p=0x%x name=%s",p->p_pid,name);
  246 if (nfhp->nfh_len > 0) printf(" fh=0x%x\n",nfhp->nfh_fh[12]);
  247 else printf(" fhl=0\n");
  248 }
  249 #endif
  250         do {
  251             dp = NULL;
  252             error = nfscl_open(vp, nfhp->nfh_fh, nfhp->nfh_len, mode, 1,
  253                 cred, p, NULL, &op, &newone, &ret, 1);
  254             if (error) {
  255                 return (error);
  256             }
  257             if (nmp->nm_clp != NULL)
  258                 clidrev = nmp->nm_clp->nfsc_clientidrev;
  259             else
  260                 clidrev = 0;
  261             if (ret == NFSCLOPEN_DOOPEN) {
  262                 if (np->n_v4 != NULL) {
  263                         error = nfsrpc_openrpc(nmp, vp, np->n_v4->n4_data,
  264                            np->n_v4->n4_fhlen, np->n_fhp->nfh_fh,
  265                            np->n_fhp->nfh_len, mode, op,
  266                            NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &dp,
  267                            0, 0x0, cred, p, 0, 0);
  268                         if (dp != NULL) {
  269 #ifdef APPLE
  270                                 OSBitAndAtomic((int32_t)~NDELEGMOD, (UInt32 *)&np->n_flag);
  271 #else
  272                                 NFSLOCKNODE(np);
  273                                 np->n_flag &= ~NDELEGMOD;
  274                                 /*
  275                                  * Invalidate the attribute cache, so that
  276                                  * attributes that pre-date the issue of a
  277                                  * delegation are not cached, since the
  278                                  * cached attributes will remain valid while
  279                                  * the delegation is held.
  280                                  */
  281                                 NFSINVALATTRCACHE(np);
  282                                 NFSUNLOCKNODE(np);
  283 #endif
  284                                 (void) nfscl_deleg(nmp->nm_mountp,
  285                                     op->nfso_own->nfsow_clp,
  286                                     nfhp->nfh_fh, nfhp->nfh_len, cred, p, &dp);
  287                         }
  288                 } else {
  289                         error = EIO;
  290                 }
  291                 newnfs_copyincred(cred, &op->nfso_cred);
  292             } else if (ret == NFSCLOPEN_SETCRED)
  293                 /*
  294                  * This is a new local open on a delegation. It needs
  295                  * to have credentials so that an open can be done
  296                  * against the server during recovery.
  297                  */
  298                 newnfs_copyincred(cred, &op->nfso_cred);
  299 
  300             /*
  301              * nfso_opencnt is the count of how many VOP_OPEN()s have
  302              * been done on this Open successfully and a VOP_CLOSE()
  303              * is expected for each of these.
  304              * If error is non-zero, don't increment it, since the Open
  305              * hasn't succeeded yet.
  306              */
  307             if (!error)
  308                 op->nfso_opencnt++;
  309             nfscl_openrelease(op, error, newone);
  310             if (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
  311                 error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY) {
  312                 (void) nfs_catnap(PZERO, error, "nfs_open");
  313             } else if ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID)
  314                 && clidrev != 0) {
  315                 expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
  316                 retrycnt++;
  317             }
  318         } while (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
  319             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
  320             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
  321              expireret == 0 && clidrev != 0 && retrycnt < 4));
  322         if (error && retrycnt >= 4)
  323                 error = EIO;
  324         return (error);
  325 }
  326 
  327 /*
  328  * the actual open rpc
  329  */
  330 APPLESTATIC int
  331 nfsrpc_openrpc(struct nfsmount *nmp, vnode_t vp, u_int8_t *nfhp, int fhlen,
  332     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
  333     u_int8_t *name, int namelen, struct nfscldeleg **dpp,
  334     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p,
  335     int syscred, int recursed)
  336 {
  337         u_int32_t *tl;
  338         struct nfsrv_descript nfsd, *nd = &nfsd;
  339         struct nfscldeleg *dp, *ndp = NULL;
  340         struct nfsvattr nfsva;
  341         u_int32_t rflags, deleg;
  342         nfsattrbit_t attrbits;
  343         int error, ret, acesize, limitby;
  344 
  345         dp = *dpp;
  346         *dpp = NULL;
  347         nfscl_reqstart(nd, NFSPROC_OPEN, nmp, nfhp, fhlen, NULL);
  348         NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
  349         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  350         *tl++ = txdr_unsigned(mode & NFSV4OPEN_ACCESSBOTH);
  351         *tl++ = txdr_unsigned((mode >> NFSLCK_SHIFT) & NFSV4OPEN_DENYBOTH);
  352         *tl++ = op->nfso_own->nfsow_clp->nfsc_clientid.lval[0];
  353         *tl = op->nfso_own->nfsow_clp->nfsc_clientid.lval[1];
  354         (void) nfsm_strtom(nd, op->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN);
  355         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  356         *tl++ = txdr_unsigned(NFSV4OPEN_NOCREATE);
  357         if (reclaim) {
  358                 *tl = txdr_unsigned(NFSV4OPEN_CLAIMPREVIOUS);
  359                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  360                 *tl = txdr_unsigned(delegtype);
  361         } else {
  362                 if (dp != NULL) {
  363                         *tl = txdr_unsigned(NFSV4OPEN_CLAIMDELEGATECUR);
  364                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
  365                         *tl++ = dp->nfsdl_stateid.seqid;
  366                         *tl++ = dp->nfsdl_stateid.other[0];
  367                         *tl++ = dp->nfsdl_stateid.other[1];
  368                         *tl = dp->nfsdl_stateid.other[2];
  369                 } else {
  370                         *tl = txdr_unsigned(NFSV4OPEN_CLAIMNULL);
  371                 }
  372                 (void) nfsm_strtom(nd, name, namelen);
  373         }
  374         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  375         *tl = txdr_unsigned(NFSV4OP_GETATTR);
  376         NFSZERO_ATTRBIT(&attrbits);
  377         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE);
  378         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY);
  379         (void) nfsrv_putattrbit(nd, &attrbits);
  380         if (syscred)
  381                 nd->nd_flag |= ND_USEGSSNAME;
  382         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
  383             NFS_PROG, NFS_VER4, NULL, 1, NULL);
  384         if (error)
  385                 return (error);
  386         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  387         if (!nd->nd_repstat) {
  388                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
  389                     6 * NFSX_UNSIGNED);
  390                 op->nfso_stateid.seqid = *tl++;
  391                 op->nfso_stateid.other[0] = *tl++;
  392                 op->nfso_stateid.other[1] = *tl++;
  393                 op->nfso_stateid.other[2] = *tl;
  394                 rflags = fxdr_unsigned(u_int32_t, *(tl + 6));
  395                 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
  396                 if (error)
  397                         goto nfsmout;
  398                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
  399                 deleg = fxdr_unsigned(u_int32_t, *tl);
  400                 if (deleg == NFSV4OPEN_DELEGATEREAD ||
  401                     deleg == NFSV4OPEN_DELEGATEWRITE) {
  402                         if (!(op->nfso_own->nfsow_clp->nfsc_flags &
  403                               NFSCLFLAGS_FIRSTDELEG))
  404                                 op->nfso_own->nfsow_clp->nfsc_flags |=
  405                                   (NFSCLFLAGS_FIRSTDELEG | NFSCLFLAGS_GOTDELEG);
  406                         MALLOC(ndp, struct nfscldeleg *,
  407                             sizeof (struct nfscldeleg) + newfhlen,
  408                             M_NFSCLDELEG, M_WAITOK);
  409                         LIST_INIT(&ndp->nfsdl_owner);
  410                         LIST_INIT(&ndp->nfsdl_lock);
  411                         ndp->nfsdl_clp = op->nfso_own->nfsow_clp;
  412                         ndp->nfsdl_fhlen = newfhlen;
  413                         NFSBCOPY(newfhp, ndp->nfsdl_fh, newfhlen);
  414                         newnfs_copyincred(cred, &ndp->nfsdl_cred);
  415                         nfscl_lockinit(&ndp->nfsdl_rwlock);
  416                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
  417                             NFSX_UNSIGNED);
  418                         ndp->nfsdl_stateid.seqid = *tl++;
  419                         ndp->nfsdl_stateid.other[0] = *tl++;
  420                         ndp->nfsdl_stateid.other[1] = *tl++;
  421                         ndp->nfsdl_stateid.other[2] = *tl++;
  422                         ret = fxdr_unsigned(int, *tl);
  423                         if (deleg == NFSV4OPEN_DELEGATEWRITE) {
  424                                 ndp->nfsdl_flags = NFSCLDL_WRITE;
  425                                 /*
  426                                  * Indicates how much the file can grow.
  427                                  */
  428                                 NFSM_DISSECT(tl, u_int32_t *,
  429                                     3 * NFSX_UNSIGNED);
  430                                 limitby = fxdr_unsigned(int, *tl++);
  431                                 switch (limitby) {
  432                                 case NFSV4OPEN_LIMITSIZE:
  433                                         ndp->nfsdl_sizelimit = fxdr_hyper(tl);
  434                                         break;
  435                                 case NFSV4OPEN_LIMITBLOCKS:
  436                                         ndp->nfsdl_sizelimit =
  437                                             fxdr_unsigned(u_int64_t, *tl++);
  438                                         ndp->nfsdl_sizelimit *=
  439                                             fxdr_unsigned(u_int64_t, *tl);
  440                                         break;
  441                                 default:
  442                                         error = NFSERR_BADXDR;
  443                                         goto nfsmout;
  444                                 };
  445                         } else {
  446                                 ndp->nfsdl_flags = NFSCLDL_READ;
  447                         }
  448                         if (ret)
  449                                 ndp->nfsdl_flags |= NFSCLDL_RECALL;
  450                         error = nfsrv_dissectace(nd, &ndp->nfsdl_ace, &ret,
  451                             &acesize, p);
  452                         if (error)
  453                                 goto nfsmout;
  454                 } else if (deleg != NFSV4OPEN_DELEGATENONE) {
  455                         error = NFSERR_BADXDR;
  456                         goto nfsmout;
  457                 }
  458                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  459                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
  460                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
  461                     NULL, NULL, NULL, p, cred);
  462                 if (error)
  463                         goto nfsmout;
  464                 if (ndp != NULL) {
  465                         ndp->nfsdl_change = nfsva.na_filerev;
  466                         ndp->nfsdl_modtime = nfsva.na_mtime;
  467                         ndp->nfsdl_flags |= NFSCLDL_MODTIMESET;
  468                 }
  469                 if (!reclaim && (rflags & NFSV4OPEN_RESULTCONFIRM)) {
  470                     do {
  471                         ret = nfsrpc_openconfirm(vp, newfhp, newfhlen, op,
  472                             cred, p);
  473                         if (ret == NFSERR_DELAY)
  474                             (void) nfs_catnap(PZERO, ret, "nfs_open");
  475                     } while (ret == NFSERR_DELAY);
  476                     error = ret;
  477                 }
  478                 if ((rflags & NFSV4OPEN_LOCKTYPEPOSIX) ||
  479                     nfscl_assumeposixlocks)
  480                     op->nfso_posixlock = 1;
  481                 else
  482                     op->nfso_posixlock = 0;
  483 
  484                 /*
  485                  * If the server is handing out delegations, but we didn't
  486                  * get one because an OpenConfirm was required, try the
  487                  * Open again, to get a delegation. This is a harmless no-op,
  488                  * from a server's point of view.
  489                  */
  490                 if (!reclaim && (rflags & NFSV4OPEN_RESULTCONFIRM) &&
  491                     (op->nfso_own->nfsow_clp->nfsc_flags & NFSCLFLAGS_GOTDELEG)
  492                     && !error && dp == NULL && ndp == NULL && !recursed) {
  493                     do {
  494                         ret = nfsrpc_openrpc(nmp, vp, nfhp, fhlen, newfhp,
  495                             newfhlen, mode, op, name, namelen, &ndp, 0, 0x0,
  496                             cred, p, syscred, 1);
  497                         if (ret == NFSERR_DELAY)
  498                             (void) nfs_catnap(PZERO, ret, "nfs_open2");
  499                     } while (ret == NFSERR_DELAY);
  500                     if (ret) {
  501                         if (ndp != NULL)
  502                                 FREE((caddr_t)ndp, M_NFSCLDELEG);
  503                         if (ret == NFSERR_STALECLIENTID ||
  504                             ret == NFSERR_STALEDONTRECOVER)
  505                                 error = ret;
  506                     }
  507                 }
  508         }
  509         if (nd->nd_repstat != 0 && error == 0)
  510                 error = nd->nd_repstat;
  511         if (error == NFSERR_STALECLIENTID)
  512                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  513 nfsmout:
  514         if (!error)
  515                 *dpp = ndp;
  516         else if (ndp != NULL)
  517                 FREE((caddr_t)ndp, M_NFSCLDELEG);
  518         mbuf_freem(nd->nd_mrep);
  519         return (error);
  520 }
  521 
  522 /*
  523  * open downgrade rpc
  524  */
  525 APPLESTATIC int
  526 nfsrpc_opendowngrade(vnode_t vp, u_int32_t mode, struct nfsclopen *op,
  527     struct ucred *cred, NFSPROC_T *p)
  528 {
  529         u_int32_t *tl;
  530         struct nfsrv_descript nfsd, *nd = &nfsd;
  531         int error;
  532 
  533         NFSCL_REQSTART(nd, NFSPROC_OPENDOWNGRADE, vp);
  534         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + 3 * NFSX_UNSIGNED);
  535         *tl++ = op->nfso_stateid.seqid;
  536         *tl++ = op->nfso_stateid.other[0];
  537         *tl++ = op->nfso_stateid.other[1];
  538         *tl++ = op->nfso_stateid.other[2];
  539         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  540         *tl++ = txdr_unsigned(mode & NFSV4OPEN_ACCESSBOTH);
  541         *tl = txdr_unsigned((mode >> NFSLCK_SHIFT) & NFSV4OPEN_DENYBOTH);
  542         error = nfscl_request(nd, vp, p, cred, NULL);
  543         if (error)
  544                 return (error);
  545         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  546         if (!nd->nd_repstat) {
  547                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  548                 op->nfso_stateid.seqid = *tl++;
  549                 op->nfso_stateid.other[0] = *tl++;
  550                 op->nfso_stateid.other[1] = *tl++;
  551                 op->nfso_stateid.other[2] = *tl;
  552         }
  553         if (nd->nd_repstat && error == 0)
  554                 error = nd->nd_repstat;
  555         if (error == NFSERR_STALESTATEID)
  556                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  557 nfsmout:
  558         mbuf_freem(nd->nd_mrep);
  559         return (error);
  560 }
  561 
  562 /*
  563  * V4 Close operation.
  564  */
  565 APPLESTATIC int
  566 nfsrpc_close(vnode_t vp, int doclose, NFSPROC_T *p)
  567 {
  568         struct nfsclclient *clp;
  569         int error;
  570 
  571         if (vnode_vtype(vp) != VREG)
  572                 return (0);
  573         if (doclose)
  574                 error = nfscl_doclose(vp, &clp, p);
  575         else
  576                 error = nfscl_getclose(vp, &clp);
  577         if (error)
  578                 return (error);
  579 
  580         nfscl_clientrelease(clp);
  581         return (0);
  582 }
  583 
  584 /*
  585  * Close the open.
  586  */
  587 APPLESTATIC void
  588 nfsrpc_doclose(struct nfsmount *nmp, struct nfsclopen *op, NFSPROC_T *p)
  589 {
  590         struct nfsrv_descript nfsd, *nd = &nfsd;
  591         struct nfscllockowner *lp, *nlp;
  592         struct nfscllock *lop, *nlop;
  593         struct ucred *tcred;
  594         u_int64_t off = 0, len = 0;
  595         u_int32_t type = NFSV4LOCKT_READ;
  596         int error, do_unlock, trycnt;
  597 
  598         tcred = newnfs_getcred();
  599         newnfs_copycred(&op->nfso_cred, tcred);
  600         /*
  601          * (Theoretically this could be done in the same
  602          *  compound as the close, but having multiple
  603          *  sequenced Ops in the same compound might be
  604          *  too scary for some servers.)
  605          */
  606         if (op->nfso_posixlock) {
  607                 off = 0;
  608                 len = NFS64BITSSET;
  609                 type = NFSV4LOCKT_READ;
  610         }
  611 
  612         /*
  613          * Since this function is only called from VOP_INACTIVE(), no
  614          * other thread will be manipulating this Open. As such, the
  615          * lock lists are not being changed by other threads, so it should
  616          * be safe to do this without locking.
  617          */
  618         LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
  619                 do_unlock = 1;
  620                 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
  621                         if (op->nfso_posixlock == 0) {
  622                                 off = lop->nfslo_first;
  623                                 len = lop->nfslo_end - lop->nfslo_first;
  624                                 if (lop->nfslo_type == F_WRLCK)
  625                                         type = NFSV4LOCKT_WRITE;
  626                                 else
  627                                         type = NFSV4LOCKT_READ;
  628                         }
  629                         if (do_unlock) {
  630                                 trycnt = 0;
  631                                 do {
  632                                         error = nfsrpc_locku(nd, nmp, lp, off,
  633                                             len, type, tcred, p, 0);
  634                                         if ((nd->nd_repstat == NFSERR_GRACE ||
  635                                             nd->nd_repstat == NFSERR_DELAY) &&
  636                                             error == 0)
  637                                                 (void) nfs_catnap(PZERO,
  638                                                     (int)nd->nd_repstat,
  639                                                     "nfs_close");
  640                                 } while ((nd->nd_repstat == NFSERR_GRACE ||
  641                                     nd->nd_repstat == NFSERR_DELAY) &&
  642                                     error == 0 && trycnt++ < 5);
  643                                 if (op->nfso_posixlock)
  644                                         do_unlock = 0;
  645                         }
  646                         nfscl_freelock(lop, 0);
  647                 }
  648                 /*
  649                  * Do a ReleaseLockOwner.
  650                  * The lock owner name nfsl_owner may be used by other opens for
  651                  * other files but the lock_owner4 name that nfsrpc_rellockown()
  652                  * puts on the wire has the file handle for this file appended
  653                  * to it, so it can be done now.
  654                  */
  655                 (void)nfsrpc_rellockown(nmp, lp, lp->nfsl_open->nfso_fh,
  656                     lp->nfsl_open->nfso_fhlen, tcred, p);
  657         }
  658 
  659         /*
  660          * There could be other Opens for different files on the same
  661          * OpenOwner, so locking is required.
  662          */
  663         NFSLOCKCLSTATE();
  664         nfscl_lockexcl(&op->nfso_own->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
  665         NFSUNLOCKCLSTATE();
  666         do {
  667                 error = nfscl_tryclose(op, tcred, nmp, p);
  668                 if (error == NFSERR_GRACE)
  669                         (void) nfs_catnap(PZERO, error, "nfs_close");
  670         } while (error == NFSERR_GRACE);
  671         NFSLOCKCLSTATE();
  672         nfscl_lockunlock(&op->nfso_own->nfsow_rwlock);
  673 
  674         LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp)
  675                 nfscl_freelockowner(lp, 0);
  676         nfscl_freeopen(op, 0);
  677         NFSUNLOCKCLSTATE();
  678         NFSFREECRED(tcred);
  679 }
  680 
  681 /*
  682  * The actual Close RPC.
  683  */
  684 APPLESTATIC int
  685 nfsrpc_closerpc(struct nfsrv_descript *nd, struct nfsmount *nmp,
  686     struct nfsclopen *op, struct ucred *cred, NFSPROC_T *p,
  687     int syscred)
  688 {
  689         u_int32_t *tl;
  690         int error;
  691 
  692         nfscl_reqstart(nd, NFSPROC_CLOSE, nmp, op->nfso_fh,
  693             op->nfso_fhlen, NULL);
  694         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
  695         *tl++ = txdr_unsigned(op->nfso_own->nfsow_seqid);
  696         *tl++ = op->nfso_stateid.seqid;
  697         *tl++ = op->nfso_stateid.other[0];
  698         *tl++ = op->nfso_stateid.other[1];
  699         *tl = op->nfso_stateid.other[2];
  700         if (syscred)
  701                 nd->nd_flag |= ND_USEGSSNAME;
  702         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
  703             NFS_PROG, NFS_VER4, NULL, 1, NULL);
  704         if (error)
  705                 return (error);
  706         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  707         if (nd->nd_repstat == 0)
  708                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  709         error = nd->nd_repstat;
  710         if (error == NFSERR_STALESTATEID)
  711                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  712 nfsmout:
  713         mbuf_freem(nd->nd_mrep);
  714         return (error);
  715 }
  716 
  717 /*
  718  * V4 Open Confirm RPC.
  719  */
  720 APPLESTATIC int
  721 nfsrpc_openconfirm(vnode_t vp, u_int8_t *nfhp, int fhlen,
  722     struct nfsclopen *op, struct ucred *cred, NFSPROC_T *p)
  723 {
  724         u_int32_t *tl;
  725         struct nfsrv_descript nfsd, *nd = &nfsd;
  726         int error;
  727 
  728         nfscl_reqstart(nd, NFSPROC_OPENCONFIRM, VFSTONFS(vnode_mount(vp)),
  729             nfhp, fhlen, NULL);
  730         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
  731         *tl++ = op->nfso_stateid.seqid;
  732         *tl++ = op->nfso_stateid.other[0];
  733         *tl++ = op->nfso_stateid.other[1];
  734         *tl++ = op->nfso_stateid.other[2];
  735         *tl = txdr_unsigned(op->nfso_own->nfsow_seqid);
  736         error = nfscl_request(nd, vp, p, cred, NULL);
  737         if (error)
  738                 return (error);
  739         NFSCL_INCRSEQID(op->nfso_own->nfsow_seqid, nd);
  740         if (!nd->nd_repstat) {
  741                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
  742                 op->nfso_stateid.seqid = *tl++;
  743                 op->nfso_stateid.other[0] = *tl++;
  744                 op->nfso_stateid.other[1] = *tl++;
  745                 op->nfso_stateid.other[2] = *tl;
  746         }
  747         error = nd->nd_repstat;
  748         if (error == NFSERR_STALESTATEID)
  749                 nfscl_initiate_recovery(op->nfso_own->nfsow_clp);
  750 nfsmout:
  751         mbuf_freem(nd->nd_mrep);
  752         return (error);
  753 }
  754 
  755 /*
  756  * Do the setclientid and setclientid confirm RPCs. Called from nfs_statfs()
  757  * when a mount has just occurred and when the server replies NFSERR_EXPIRED.
  758  */
  759 APPLESTATIC int
  760 nfsrpc_setclient(struct nfsmount *nmp, struct nfsclclient *clp,
  761     struct ucred *cred, NFSPROC_T *p)
  762 {
  763         u_int32_t *tl;
  764         struct nfsrv_descript nfsd;
  765         struct nfsrv_descript *nd = &nfsd;
  766         nfsattrbit_t attrbits;
  767         u_int8_t *cp = NULL, *cp2, addr[INET6_ADDRSTRLEN + 9];
  768         u_short port;
  769         int error, isinet6 = 0, callblen;
  770         nfsquad_t confirm;
  771         u_int32_t lease;
  772         static u_int32_t rev = 0;
  773 
  774         if (nfsboottime.tv_sec == 0)
  775                 NFSSETBOOTTIME(nfsboottime);
  776         nfscl_reqstart(nd, NFSPROC_SETCLIENTID, nmp, NULL, 0, NULL);
  777         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
  778         *tl++ = txdr_unsigned(nfsboottime.tv_sec);
  779         *tl = txdr_unsigned(rev++);
  780         (void) nfsm_strtom(nd, clp->nfsc_id, clp->nfsc_idlen);
  781 
  782         /*
  783          * set up the callback address
  784          */
  785         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  786         *tl = txdr_unsigned(NFS_CALLBCKPROG);
  787         callblen = strlen(nfsv4_callbackaddr);
  788         if (callblen == 0)
  789                 cp = nfscl_getmyip(nmp, &isinet6);
  790         if (nfscl_enablecallb && nfs_numnfscbd > 0 &&
  791             (callblen > 0 || cp != NULL)) {
  792                 port = htons(nfsv4_cbport);
  793                 cp2 = (u_int8_t *)&port;
  794 #ifdef INET6
  795                 if ((callblen > 0 &&
  796                      strchr(nfsv4_callbackaddr, ':')) || isinet6) {
  797                         char ip6buf[INET6_ADDRSTRLEN], *ip6add;
  798 
  799                         (void) nfsm_strtom(nd, "tcp6", 4);
  800                         if (callblen == 0) {
  801                                 ip6_sprintf(ip6buf, (struct in6_addr *)cp);
  802                                 ip6add = ip6buf;
  803                         } else {
  804                                 ip6add = nfsv4_callbackaddr;
  805                         }
  806                         snprintf(addr, INET6_ADDRSTRLEN + 9, "%s.%d.%d",
  807                             ip6add, cp2[0], cp2[1]);
  808                 } else
  809 #endif
  810                 {
  811                         (void) nfsm_strtom(nd, "tcp", 3);
  812                         if (callblen == 0)
  813                                 snprintf(addr, INET6_ADDRSTRLEN + 9,
  814                                     "%d.%d.%d.%d.%d.%d", cp[0], cp[1],
  815                                     cp[2], cp[3], cp2[0], cp2[1]);
  816                         else
  817                                 snprintf(addr, INET6_ADDRSTRLEN + 9,
  818                                     "%s.%d.%d", nfsv4_callbackaddr,
  819                                     cp2[0], cp2[1]);
  820                 }
  821                 (void) nfsm_strtom(nd, addr, strlen(addr));
  822         } else {
  823                 (void) nfsm_strtom(nd, "tcp", 3);
  824                 (void) nfsm_strtom(nd, "0.0.0.0.0.0", 11);
  825         }
  826         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
  827         *tl = txdr_unsigned(clp->nfsc_cbident);
  828         nd->nd_flag |= ND_USEGSSNAME;
  829         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
  830                 NFS_PROG, NFS_VER4, NULL, 1, NULL);
  831         if (error)
  832                 return (error);
  833         if (nd->nd_repstat == 0) {
  834             NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
  835             clp->nfsc_clientid.lval[0] = *tl++;
  836             clp->nfsc_clientid.lval[1] = *tl++;
  837             confirm.lval[0] = *tl++;
  838             confirm.lval[1] = *tl;
  839             mbuf_freem(nd->nd_mrep);
  840             nd->nd_mrep = NULL;
  841 
  842             /*
  843              * and confirm it.
  844              */
  845             nfscl_reqstart(nd, NFSPROC_SETCLIENTIDCFRM, nmp, NULL, 0, NULL);
  846             NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
  847             *tl++ = clp->nfsc_clientid.lval[0];
  848             *tl++ = clp->nfsc_clientid.lval[1];
  849             *tl++ = confirm.lval[0];
  850             *tl = confirm.lval[1];
  851             nd->nd_flag |= ND_USEGSSNAME;
  852             error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p,
  853                 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL);
  854             if (error)
  855                 return (error);
  856             mbuf_freem(nd->nd_mrep);
  857             nd->nd_mrep = NULL;
  858             if (nd->nd_repstat == 0) {
  859                 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, nmp->nm_fh,
  860                     nmp->nm_fhsize, NULL);
  861                 NFSZERO_ATTRBIT(&attrbits);
  862                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_LEASETIME);
  863                 (void) nfsrv_putattrbit(nd, &attrbits);
  864                 nd->nd_flag |= ND_USEGSSNAME;
  865                 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p,
  866                     cred, NFS_PROG, NFS_VER4, NULL, 1, NULL);
  867                 if (error)
  868                     return (error);
  869                 if (nd->nd_repstat == 0) {
  870                     error = nfsv4_loadattr(nd, NULL, NULL, NULL, NULL, 0, NULL,
  871                         NULL, NULL, NULL, NULL, 0, NULL, &lease, NULL, p, cred);
  872                     if (error)
  873                         goto nfsmout;
  874                     clp->nfsc_renew = NFSCL_RENEW(lease);
  875                     clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
  876                     clp->nfsc_clientidrev++;
  877                     if (clp->nfsc_clientidrev == 0)
  878                         clp->nfsc_clientidrev++;
  879                 }
  880             }
  881         }
  882         error = nd->nd_repstat;
  883 nfsmout:
  884         mbuf_freem(nd->nd_mrep);
  885         return (error);
  886 }
  887 
  888 /*
  889  * nfs getattr call.
  890  */
  891 APPLESTATIC int
  892 nfsrpc_getattr(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
  893     struct nfsvattr *nap, void *stuff)
  894 {
  895         struct nfsrv_descript nfsd, *nd = &nfsd;
  896         int error;
  897         nfsattrbit_t attrbits;
  898         
  899         NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
  900         if (nd->nd_flag & ND_NFSV4) {
  901                 NFSGETATTR_ATTRBIT(&attrbits);
  902                 (void) nfsrv_putattrbit(nd, &attrbits);
  903         }
  904         error = nfscl_request(nd, vp, p, cred, stuff);
  905         if (error)
  906                 return (error);
  907         if (!nd->nd_repstat)
  908                 error = nfsm_loadattr(nd, nap);
  909         else
  910                 error = nd->nd_repstat;
  911         mbuf_freem(nd->nd_mrep);
  912         return (error);
  913 }
  914 
  915 /*
  916  * nfs getattr call with non-vnode arguemnts.
  917  */
  918 APPLESTATIC int
  919 nfsrpc_getattrnovp(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, int syscred,
  920     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, u_int64_t *xidp)
  921 {
  922         struct nfsrv_descript nfsd, *nd = &nfsd;
  923         int error, vers = NFS_VER2;
  924         nfsattrbit_t attrbits;
  925         
  926         nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, fhp, fhlen, NULL);
  927         if (nd->nd_flag & ND_NFSV4) {
  928                 vers = NFS_VER4;
  929                 NFSGETATTR_ATTRBIT(&attrbits);
  930                 (void) nfsrv_putattrbit(nd, &attrbits);
  931         } else if (nd->nd_flag & ND_NFSV3) {
  932                 vers = NFS_VER3;
  933         }
  934         if (syscred)
  935                 nd->nd_flag |= ND_USEGSSNAME;
  936         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
  937             NFS_PROG, vers, NULL, 1, xidp);
  938         if (error)
  939                 return (error);
  940         if (!nd->nd_repstat)
  941                 error = nfsm_loadattr(nd, nap);
  942         else
  943                 error = nd->nd_repstat;
  944         mbuf_freem(nd->nd_mrep);
  945         return (error);
  946 }
  947 
  948 /*
  949  * Do an nfs setattr operation.
  950  */
  951 APPLESTATIC int
  952 nfsrpc_setattr(vnode_t vp, struct vattr *vap, NFSACL_T *aclp,
  953     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *rnap, int *attrflagp,
  954     void *stuff)
  955 {
  956         int error, expireret = 0, openerr, retrycnt;
  957         u_int32_t clidrev = 0, mode;
  958         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
  959         struct nfsfh *nfhp;
  960         nfsv4stateid_t stateid;
  961         void *lckp;
  962 
  963         if (nmp->nm_clp != NULL)
  964                 clidrev = nmp->nm_clp->nfsc_clientidrev;
  965         if (vap != NULL && NFSATTRISSET(u_quad_t, vap, va_size))
  966                 mode = NFSV4OPEN_ACCESSWRITE;
  967         else
  968                 mode = NFSV4OPEN_ACCESSREAD;
  969         retrycnt = 0;
  970         do {
  971                 lckp = NULL;
  972                 openerr = 1;
  973                 if (NFSHASNFSV4(nmp)) {
  974                         nfhp = VTONFS(vp)->n_fhp;
  975                         error = nfscl_getstateid(vp, nfhp->nfh_fh,
  976                             nfhp->nfh_len, mode, cred, p, &stateid, &lckp);
  977                         if (error && vnode_vtype(vp) == VREG &&
  978                             (mode == NFSV4OPEN_ACCESSWRITE ||
  979                              nfstest_openallsetattr)) {
  980                                 /*
  981                                  * No Open stateid, so try and open the file
  982                                  * now.
  983                                  */
  984                                 if (mode == NFSV4OPEN_ACCESSWRITE)
  985                                         openerr = nfsrpc_open(vp, FWRITE, cred,
  986                                             p);
  987                                 else
  988                                         openerr = nfsrpc_open(vp, FREAD, cred,
  989                                             p);
  990                                 if (!openerr)
  991                                         (void) nfscl_getstateid(vp,
  992                                             nfhp->nfh_fh, nfhp->nfh_len,
  993                                             mode, cred, p, &stateid, &lckp);
  994                         }
  995                 }
  996                 if (vap != NULL)
  997                         error = nfsrpc_setattrrpc(vp, vap, &stateid, cred, p,
  998                             rnap, attrflagp, stuff);
  999                 else
 1000                         error = nfsrpc_setaclrpc(vp, cred, p, aclp, &stateid,
 1001                             stuff);
 1002                 if (error == NFSERR_STALESTATEID)
 1003                         nfscl_initiate_recovery(nmp->nm_clp);
 1004                 if (lckp != NULL)
 1005                         nfscl_lockderef(lckp);
 1006                 if (!openerr)
 1007                         (void) nfsrpc_close(vp, 0, p);
 1008                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1009                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1010                     error == NFSERR_OLDSTATEID) {
 1011                         (void) nfs_catnap(PZERO, error, "nfs_setattr");
 1012                 } else if ((error == NFSERR_EXPIRED ||
 1013                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1014                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1015                 }
 1016                 retrycnt++;
 1017         } while (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1018             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1019             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1020             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1021              expireret == 0 && clidrev != 0 && retrycnt < 4));
 1022         if (error && retrycnt >= 4)
 1023                 error = EIO;
 1024         return (error);
 1025 }
 1026 
 1027 static int
 1028 nfsrpc_setattrrpc(vnode_t vp, struct vattr *vap,
 1029     nfsv4stateid_t *stateidp, struct ucred *cred, NFSPROC_T *p,
 1030     struct nfsvattr *rnap, int *attrflagp, void *stuff)
 1031 {
 1032         u_int32_t *tl;
 1033         struct nfsrv_descript nfsd, *nd = &nfsd;
 1034         int error;
 1035         nfsattrbit_t attrbits;
 1036 
 1037         *attrflagp = 0;
 1038         NFSCL_REQSTART(nd, NFSPROC_SETATTR, vp);
 1039         if (nd->nd_flag & ND_NFSV4)
 1040                 nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1041         vap->va_type = vnode_vtype(vp);
 1042         nfscl_fillsattr(nd, vap, vp, NFSSATTR_FULL, 0);
 1043         if (nd->nd_flag & ND_NFSV3) {
 1044                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1045                 *tl = newnfs_false;
 1046         } else if (nd->nd_flag & ND_NFSV4) {
 1047                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1048                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1049                 NFSGETATTR_ATTRBIT(&attrbits);
 1050                 (void) nfsrv_putattrbit(nd, &attrbits);
 1051         }
 1052         error = nfscl_request(nd, vp, p, cred, stuff);
 1053         if (error)
 1054                 return (error);
 1055         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 1056                 error = nfscl_wcc_data(nd, vp, rnap, attrflagp, NULL, stuff);
 1057         if ((nd->nd_flag & ND_NFSV4) && !error)
 1058                 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 1059         if (!(nd->nd_flag & ND_NFSV3) && !nd->nd_repstat && !error)
 1060                 error = nfscl_postop_attr(nd, rnap, attrflagp, stuff);
 1061         mbuf_freem(nd->nd_mrep);
 1062         if (nd->nd_repstat && !error)
 1063                 error = nd->nd_repstat;
 1064         return (error);
 1065 }
 1066 
 1067 /*
 1068  * nfs lookup rpc
 1069  */
 1070 APPLESTATIC int
 1071 nfsrpc_lookup(vnode_t dvp, char *name, int len, struct ucred *cred,
 1072     NFSPROC_T *p, struct nfsvattr *dnap, struct nfsvattr *nap,
 1073     struct nfsfh **nfhpp, int *attrflagp, int *dattrflagp, void *stuff)
 1074 {
 1075         u_int32_t *tl;
 1076         struct nfsrv_descript nfsd, *nd = &nfsd;
 1077         struct nfsmount *nmp;
 1078         struct nfsnode *np;
 1079         struct nfsfh *nfhp;
 1080         nfsattrbit_t attrbits;
 1081         int error = 0, lookupp = 0;
 1082 
 1083         *attrflagp = 0;
 1084         *dattrflagp = 0;
 1085         if (vnode_vtype(dvp) != VDIR)
 1086                 return (ENOTDIR);
 1087         nmp = VFSTONFS(vnode_mount(dvp));
 1088         if (len > NFS_MAXNAMLEN)
 1089                 return (ENAMETOOLONG);
 1090         if (NFSHASNFSV4(nmp) && len == 1 &&
 1091                 name[0] == '.') {
 1092                 /*
 1093                  * Just return the current dir's fh.
 1094                  */
 1095                 np = VTONFS(dvp);
 1096                 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) +
 1097                         np->n_fhp->nfh_len, M_NFSFH, M_WAITOK);
 1098                 nfhp->nfh_len = np->n_fhp->nfh_len;
 1099                 NFSBCOPY(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len);
 1100                 *nfhpp = nfhp;
 1101                 return (0);
 1102         }
 1103         if (NFSHASNFSV4(nmp) && len == 2 &&
 1104                 name[0] == '.' && name[1] == '.') {
 1105                 lookupp = 1;
 1106                 NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, dvp);
 1107         } else {
 1108                 NFSCL_REQSTART(nd, NFSPROC_LOOKUP, dvp);
 1109                 (void) nfsm_strtom(nd, name, len);
 1110         }
 1111         if (nd->nd_flag & ND_NFSV4) {
 1112                 NFSGETATTR_ATTRBIT(&attrbits);
 1113                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1114                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 1115                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1116                 (void) nfsrv_putattrbit(nd, &attrbits);
 1117         }
 1118         error = nfscl_request(nd, dvp, p, cred, stuff);
 1119         if (error)
 1120                 return (error);
 1121         if (nd->nd_repstat) {
 1122                 /*
 1123                  * When an NFSv4 Lookupp returns ENOENT, it means that
 1124                  * the lookup is at the root of an fs, so return this dir.
 1125                  */
 1126                 if (nd->nd_repstat == NFSERR_NOENT && lookupp) {
 1127                     np = VTONFS(dvp);
 1128                     MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) +
 1129                         np->n_fhp->nfh_len, M_NFSFH, M_WAITOK);
 1130                     nfhp->nfh_len = np->n_fhp->nfh_len;
 1131                     NFSBCOPY(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len);
 1132                     *nfhpp = nfhp;
 1133                     mbuf_freem(nd->nd_mrep);
 1134                     return (0);
 1135                 }
 1136                 if (nd->nd_flag & ND_NFSV3)
 1137                     error = nfscl_postop_attr(nd, dnap, dattrflagp, stuff);
 1138                 goto nfsmout;
 1139         }
 1140         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 1141                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1142                 if (*(tl + 1)) {
 1143                         nd->nd_flag |= ND_NOMOREDATA;
 1144                         goto nfsmout;
 1145                 }
 1146         }
 1147         error = nfsm_getfh(nd, nfhpp);
 1148         if (error)
 1149                 goto nfsmout;
 1150 
 1151         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1152         if ((nd->nd_flag & ND_NFSV3) && !error)
 1153                 error = nfscl_postop_attr(nd, dnap, dattrflagp, stuff);
 1154 nfsmout:
 1155         mbuf_freem(nd->nd_mrep);
 1156         if (!error && nd->nd_repstat)
 1157                 error = nd->nd_repstat;
 1158         return (error);
 1159 }
 1160 
 1161 /*
 1162  * Do a readlink rpc.
 1163  */
 1164 APPLESTATIC int
 1165 nfsrpc_readlink(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1166     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1167 {
 1168         u_int32_t *tl;
 1169         struct nfsrv_descript nfsd, *nd = &nfsd;
 1170         struct nfsnode *np = VTONFS(vp);
 1171         nfsattrbit_t attrbits;
 1172         int error, len, cangetattr = 1;
 1173 
 1174         *attrflagp = 0;
 1175         NFSCL_REQSTART(nd, NFSPROC_READLINK, vp);
 1176         if (nd->nd_flag & ND_NFSV4) {
 1177                 /*
 1178                  * And do a Getattr op.
 1179                  */
 1180                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1181                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1182                 NFSGETATTR_ATTRBIT(&attrbits);
 1183                 (void) nfsrv_putattrbit(nd, &attrbits);
 1184         }
 1185         error = nfscl_request(nd, vp, p, cred, stuff);
 1186         if (error)
 1187                 return (error);
 1188         if (nd->nd_flag & ND_NFSV3)
 1189                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1190         if (!nd->nd_repstat && !error) {
 1191                 NFSM_STRSIZ(len, NFS_MAXPATHLEN);
 1192                 /*
 1193                  * This seems weird to me, but must have been added to
 1194                  * FreeBSD for some reason. The only thing I can think of
 1195                  * is that there was/is some server that replies with
 1196                  * more link data than it should?
 1197                  */
 1198                 if (len == NFS_MAXPATHLEN) {
 1199                         NFSLOCKNODE(np);
 1200                         if (np->n_size > 0 && np->n_size < NFS_MAXPATHLEN) {
 1201                                 len = np->n_size;
 1202                                 cangetattr = 0;
 1203                         }
 1204                         NFSUNLOCKNODE(np);
 1205                 }
 1206                 error = nfsm_mbufuio(nd, uiop, len);
 1207                 if ((nd->nd_flag & ND_NFSV4) && !error && cangetattr)
 1208                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1209         }
 1210         if (nd->nd_repstat && !error)
 1211                 error = nd->nd_repstat;
 1212 nfsmout:
 1213         mbuf_freem(nd->nd_mrep);
 1214         return (error);
 1215 }
 1216 
 1217 /*
 1218  * Read operation.
 1219  */
 1220 APPLESTATIC int
 1221 nfsrpc_read(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1222     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1223 {
 1224         int error, expireret = 0, retrycnt;
 1225         u_int32_t clidrev = 0;
 1226         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1227         struct nfsnode *np = VTONFS(vp);
 1228         struct ucred *newcred;
 1229         struct nfsfh *nfhp = NULL;
 1230         nfsv4stateid_t stateid;
 1231         void *lckp;
 1232 
 1233         if (nmp->nm_clp != NULL)
 1234                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 1235         newcred = cred;
 1236         if (NFSHASNFSV4(nmp)) {
 1237                 nfhp = np->n_fhp;
 1238                 newcred = NFSNEWCRED(cred);
 1239         }
 1240         retrycnt = 0;
 1241         do {
 1242                 lckp = NULL;
 1243                 if (NFSHASNFSV4(nmp))
 1244                         (void)nfscl_getstateid(vp, nfhp->nfh_fh, nfhp->nfh_len,
 1245                             NFSV4OPEN_ACCESSREAD, newcred, p, &stateid, &lckp);
 1246                 error = nfsrpc_readrpc(vp, uiop, newcred, &stateid, p, nap,
 1247                     attrflagp, stuff);
 1248                 if (error == NFSERR_STALESTATEID)
 1249                         nfscl_initiate_recovery(nmp->nm_clp);
 1250                 if (lckp != NULL)
 1251                         nfscl_lockderef(lckp);
 1252                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1253                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1254                     error == NFSERR_OLDSTATEID) {
 1255                         (void) nfs_catnap(PZERO, error, "nfs_read");
 1256                 } else if ((error == NFSERR_EXPIRED ||
 1257                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1258                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1259                 }
 1260                 retrycnt++;
 1261         } while (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1262             error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1263             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1264             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1265              expireret == 0 && clidrev != 0 && retrycnt < 4));
 1266         if (error && retrycnt >= 4)
 1267                 error = EIO;
 1268         if (NFSHASNFSV4(nmp))
 1269                 NFSFREECRED(newcred);
 1270         return (error);
 1271 }
 1272 
 1273 /*
 1274  * The actual read RPC.
 1275  */
 1276 static int
 1277 nfsrpc_readrpc(vnode_t vp, struct uio *uiop, struct ucred *cred,
 1278     nfsv4stateid_t *stateidp, NFSPROC_T *p, struct nfsvattr *nap,
 1279     int *attrflagp, void *stuff)
 1280 {
 1281         u_int32_t *tl;
 1282         int error = 0, len, retlen, tsiz, eof = 0;
 1283         struct nfsrv_descript nfsd;
 1284         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1285         struct nfsrv_descript *nd = &nfsd;
 1286         int rsize;
 1287         off_t tmp_off;
 1288 
 1289         *attrflagp = 0;
 1290         tsiz = uio_uio_resid(uiop);
 1291         tmp_off = uiop->uio_offset + tsiz;
 1292         NFSLOCKMNT(nmp);
 1293         if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) {
 1294                 NFSUNLOCKMNT(nmp);
 1295                 return (EFBIG);
 1296         }
 1297         rsize = nmp->nm_rsize;
 1298         NFSUNLOCKMNT(nmp);
 1299         nd->nd_mrep = NULL;
 1300         while (tsiz > 0) {
 1301                 *attrflagp = 0;
 1302                 len = (tsiz > rsize) ? rsize : tsiz;
 1303                 NFSCL_REQSTART(nd, NFSPROC_READ, vp);
 1304                 if (nd->nd_flag & ND_NFSV4)
 1305                         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1306                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED * 3);
 1307                 if (nd->nd_flag & ND_NFSV2) {
 1308                         *tl++ = txdr_unsigned(uiop->uio_offset);
 1309                         *tl++ = txdr_unsigned(len);
 1310                         *tl = 0;
 1311                 } else {
 1312                         txdr_hyper(uiop->uio_offset, tl);
 1313                         *(tl + 2) = txdr_unsigned(len);
 1314                 }
 1315                 /*
 1316                  * Since I can't do a Getattr for NFSv4 for Write, there
 1317                  * doesn't seem any point in doing one here, either.
 1318                  * (See the comment in nfsrpc_writerpc() for more info.)
 1319                  */
 1320                 error = nfscl_request(nd, vp, p, cred, stuff);
 1321                 if (error)
 1322                         return (error);
 1323                 if (nd->nd_flag & ND_NFSV3) {
 1324                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 1325                 } else if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV2)) {
 1326                         error = nfsm_loadattr(nd, nap);
 1327                         if (!error)
 1328                                 *attrflagp = 1;
 1329                 }
 1330                 if (nd->nd_repstat || error) {
 1331                         if (!error)
 1332                                 error = nd->nd_repstat;
 1333                         goto nfsmout;
 1334                 }
 1335                 if (nd->nd_flag & ND_NFSV3) {
 1336                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1337                         eof = fxdr_unsigned(int, *(tl + 1));
 1338                 } else if (nd->nd_flag & ND_NFSV4) {
 1339                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 1340                         eof = fxdr_unsigned(int, *tl);
 1341                 }
 1342                 NFSM_STRSIZ(retlen, len);
 1343                 error = nfsm_mbufuio(nd, uiop, retlen);
 1344                 if (error)
 1345                         goto nfsmout;
 1346                 mbuf_freem(nd->nd_mrep);
 1347                 nd->nd_mrep = NULL;
 1348                 tsiz -= retlen;
 1349                 if (!(nd->nd_flag & ND_NFSV2)) {
 1350                         if (eof || retlen == 0)
 1351                                 tsiz = 0;
 1352                 } else if (retlen < len)
 1353                         tsiz = 0;
 1354         }
 1355         return (0);
 1356 nfsmout:
 1357         if (nd->nd_mrep != NULL)
 1358                 mbuf_freem(nd->nd_mrep);
 1359         return (error);
 1360 }
 1361 
 1362 /*
 1363  * nfs write operation
 1364  * When called_from_strategy != 0, it should return EIO for an error that
 1365  * indicates recovery is in progress, so that the buffer will be left
 1366  * dirty and be written back to the server later. If it loops around,
 1367  * the recovery thread could get stuck waiting for the buffer and recovery
 1368  * will then deadlock.
 1369  */
 1370 APPLESTATIC int
 1371 nfsrpc_write(vnode_t vp, struct uio *uiop, int *iomode, int *must_commit,
 1372     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 1373     void *stuff, int called_from_strategy)
 1374 {
 1375         int error, expireret = 0, retrycnt, nostateid;
 1376         u_int32_t clidrev = 0;
 1377         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1378         struct nfsnode *np = VTONFS(vp);
 1379         struct ucred *newcred;
 1380         struct nfsfh *nfhp = NULL;
 1381         nfsv4stateid_t stateid;
 1382         void *lckp;
 1383 
 1384         *must_commit = 0;
 1385         if (nmp->nm_clp != NULL)
 1386                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 1387         newcred = cred;
 1388         if (NFSHASNFSV4(nmp)) {
 1389                 newcred = NFSNEWCRED(cred);
 1390                 nfhp = np->n_fhp;
 1391         }
 1392         retrycnt = 0;
 1393         do {
 1394                 lckp = NULL;
 1395                 nostateid = 0;
 1396                 if (NFSHASNFSV4(nmp)) {
 1397                         (void)nfscl_getstateid(vp, nfhp->nfh_fh, nfhp->nfh_len,
 1398                             NFSV4OPEN_ACCESSWRITE, newcred, p, &stateid, &lckp);
 1399                         if (stateid.other[0] == 0 && stateid.other[1] == 0 &&
 1400                             stateid.other[2] == 0) {
 1401                                 nostateid = 1;
 1402                                 NFSCL_DEBUG(1, "stateid0 in write\n");
 1403                         }
 1404                 }
 1405 
 1406                 /*
 1407                  * If there is no stateid for NFSv4, it means this is an
 1408                  * extraneous write after close. Basically a poorly
 1409                  * implemented buffer cache. Just don't do the write.
 1410                  */
 1411                 if (nostateid)
 1412                         error = 0;
 1413                 else
 1414                         error = nfsrpc_writerpc(vp, uiop, iomode, must_commit,
 1415                             newcred, &stateid, p, nap, attrflagp, stuff);
 1416                 if (error == NFSERR_STALESTATEID)
 1417                         nfscl_initiate_recovery(nmp->nm_clp);
 1418                 if (lckp != NULL)
 1419                         nfscl_lockderef(lckp);
 1420                 if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 1421                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1422                     error == NFSERR_OLDSTATEID) {
 1423                         (void) nfs_catnap(PZERO, error, "nfs_write");
 1424                 } else if ((error == NFSERR_EXPIRED ||
 1425                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1426                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1427                 }
 1428                 retrycnt++;
 1429         } while (error == NFSERR_GRACE || error == NFSERR_DELAY ||
 1430             ((error == NFSERR_STALESTATEID ||
 1431               error == NFSERR_STALEDONTRECOVER) && called_from_strategy == 0) ||
 1432             (error == NFSERR_OLDSTATEID && retrycnt < 20) ||
 1433             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1434              expireret == 0 && clidrev != 0 && retrycnt < 4));
 1435         if (error != 0 && (retrycnt >= 4 ||
 1436             ((error == NFSERR_STALESTATEID ||
 1437               error == NFSERR_STALEDONTRECOVER) && called_from_strategy != 0)))
 1438                 error = EIO;
 1439         if (NFSHASNFSV4(nmp))
 1440                 NFSFREECRED(newcred);
 1441         return (error);
 1442 }
 1443 
 1444 /*
 1445  * The actual write RPC.
 1446  */
 1447 static int
 1448 nfsrpc_writerpc(vnode_t vp, struct uio *uiop, int *iomode,
 1449     int *must_commit, struct ucred *cred, nfsv4stateid_t *stateidp,
 1450     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 1451 {
 1452         u_int32_t *tl;
 1453         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 1454         struct nfsnode *np = VTONFS(vp);
 1455         int error = 0, len, tsiz, rlen, commit, committed = NFSWRITE_FILESYNC;
 1456         int wccflag = 0, wsize;
 1457         int32_t backup;
 1458         struct nfsrv_descript nfsd;
 1459         struct nfsrv_descript *nd = &nfsd;
 1460         nfsattrbit_t attrbits;
 1461         off_t tmp_off;
 1462 
 1463         KASSERT(uiop->uio_iovcnt == 1, ("nfs: writerpc iovcnt > 1"));
 1464         *attrflagp = 0;
 1465         tsiz = uio_uio_resid(uiop);
 1466         tmp_off = uiop->uio_offset + tsiz;
 1467         NFSLOCKMNT(nmp);
 1468         if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset) {
 1469                 NFSUNLOCKMNT(nmp);
 1470                 return (EFBIG);
 1471         }
 1472         wsize = nmp->nm_wsize;
 1473         NFSUNLOCKMNT(nmp);
 1474         nd->nd_mrep = NULL;     /* NFSv2 sometimes does a write with */
 1475         nd->nd_repstat = 0;     /* uio_resid == 0, so the while is not done */
 1476         while (tsiz > 0) {
 1477                 *attrflagp = 0;
 1478                 len = (tsiz > wsize) ? wsize : tsiz;
 1479                 NFSCL_REQSTART(nd, NFSPROC_WRITE, vp);
 1480                 if (nd->nd_flag & ND_NFSV4) {
 1481                         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 1482                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER+2*NFSX_UNSIGNED);
 1483                         txdr_hyper(uiop->uio_offset, tl);
 1484                         tl += 2;
 1485                         *tl++ = txdr_unsigned(*iomode);
 1486                         *tl = txdr_unsigned(len);
 1487                 } else if (nd->nd_flag & ND_NFSV3) {
 1488                         NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER+3*NFSX_UNSIGNED);
 1489                         txdr_hyper(uiop->uio_offset, tl);
 1490                         tl += 2;
 1491                         *tl++ = txdr_unsigned(len);
 1492                         *tl++ = txdr_unsigned(*iomode);
 1493                         *tl = txdr_unsigned(len);
 1494                 } else {
 1495                         u_int32_t x;
 1496 
 1497                         NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
 1498                         /*
 1499                          * Not sure why someone changed this, since the
 1500                          * RFC clearly states that "beginoffset" and
 1501                          * "totalcount" are ignored, but it wouldn't
 1502                          * surprise me if there's a busted server out there.
 1503                          */
 1504                         /* Set both "begin" and "current" to non-garbage. */
 1505                         x = txdr_unsigned((u_int32_t)uiop->uio_offset);
 1506                         *tl++ = x;      /* "begin offset" */
 1507                         *tl++ = x;      /* "current offset" */
 1508                         x = txdr_unsigned(len);
 1509                         *tl++ = x;      /* total to this offset */
 1510                         *tl = x;        /* size of this write */
 1511 
 1512                 }
 1513                 nfsm_uiombuf(nd, uiop, len);
 1514                 /*
 1515                  * Although it is tempting to do a normal Getattr Op in the
 1516                  * NFSv4 compound, the result can be a nearly hung client
 1517                  * system if the Getattr asks for Owner and/or OwnerGroup.
 1518                  * It occurs when the client can't map either the Owner or
 1519                  * Owner_group name in the Getattr reply to a uid/gid. When
 1520                  * there is a cache miss, the kernel does an upcall to the
 1521                  * nfsuserd. Then, it can try and read the local /etc/passwd
 1522                  * or /etc/group file. It can then block in getnewbuf(),
 1523                  * waiting for dirty writes to be pushed to the NFS server.
 1524                  * The only reason this doesn't result in a complete
 1525                  * deadlock, is that the upcall times out and allows
 1526                  * the write to complete. However, progress is so slow
 1527                  * that it might just as well be deadlocked.
 1528                  * As such, we get the rest of the attributes, but not
 1529                  * Owner or Owner_group.
 1530                  * nb: nfscl_loadattrcache() needs to be told that these
 1531                  *     partial attributes from a write rpc are being
 1532                  *     passed in, via a argument flag.
 1533                  */
 1534                 if (nd->nd_flag & ND_NFSV4) {
 1535                         NFSWRITEGETATTR_ATTRBIT(&attrbits);
 1536                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1537                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1538                         (void) nfsrv_putattrbit(nd, &attrbits);
 1539                 }
 1540                 error = nfscl_request(nd, vp, p, cred, stuff);
 1541                 if (error)
 1542                         return (error);
 1543                 if (nd->nd_repstat) {
 1544                         /*
 1545                          * In case the rpc gets retried, roll
 1546                          * the uio fileds changed by nfsm_uiombuf()
 1547                          * back.
 1548                          */
 1549                         uiop->uio_offset -= len;
 1550                         uio_uio_resid_add(uiop, len);
 1551                         uio_iov_base_add(uiop, -len);
 1552                         uio_iov_len_add(uiop, len);
 1553                 }
 1554                 if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1555                         error = nfscl_wcc_data(nd, vp, nap, attrflagp,
 1556                             &wccflag, stuff);
 1557                         if (error)
 1558                                 goto nfsmout;
 1559                 }
 1560                 if (!nd->nd_repstat) {
 1561                         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 1562                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED
 1563                                         + NFSX_VERF);
 1564                                 rlen = fxdr_unsigned(int, *tl++);
 1565                                 if (rlen == 0) {
 1566                                         error = NFSERR_IO;
 1567                                         goto nfsmout;
 1568                                 } else if (rlen < len) {
 1569                                         backup = len - rlen;
 1570                                         uio_iov_base_add(uiop, -(backup));
 1571                                         uio_iov_len_add(uiop, backup);
 1572                                         uiop->uio_offset -= backup;
 1573                                         uio_uio_resid_add(uiop, backup);
 1574                                         len = rlen;
 1575                                 }
 1576                                 commit = fxdr_unsigned(int, *tl++);
 1577 
 1578                                 /*
 1579                                  * Return the lowest committment level
 1580                                  * obtained by any of the RPCs.
 1581                                  */
 1582                                 if (committed == NFSWRITE_FILESYNC)
 1583                                         committed = commit;
 1584                                 else if (committed == NFSWRITE_DATASYNC &&
 1585                                         commit == NFSWRITE_UNSTABLE)
 1586                                         committed = commit;
 1587                                 NFSLOCKMNT(nmp);
 1588                                 if (!NFSHASWRITEVERF(nmp)) {
 1589                                         NFSBCOPY((caddr_t)tl,
 1590                                             (caddr_t)&nmp->nm_verf[0],
 1591                                             NFSX_VERF);
 1592                                         NFSSETWRITEVERF(nmp);
 1593                                 } else if (NFSBCMP(tl, nmp->nm_verf,
 1594                                     NFSX_VERF)) {
 1595                                         *must_commit = 1;
 1596                                         NFSBCOPY(tl, nmp->nm_verf, NFSX_VERF);
 1597                                 }
 1598                                 NFSUNLOCKMNT(nmp);
 1599                         }
 1600                         if (nd->nd_flag & ND_NFSV4)
 1601                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1602                         if (nd->nd_flag & (ND_NFSV2 | ND_NFSV4)) {
 1603                                 error = nfsm_loadattr(nd, nap);
 1604                                 if (!error)
 1605                                         *attrflagp = NFS_LATTR_NOSHRINK;
 1606                         }
 1607                 } else {
 1608                         error = nd->nd_repstat;
 1609                 }
 1610                 if (error)
 1611                         goto nfsmout;
 1612                 NFSWRITERPC_SETTIME(wccflag, np, (nd->nd_flag & ND_NFSV4));
 1613                 mbuf_freem(nd->nd_mrep);
 1614                 nd->nd_mrep = NULL;
 1615                 tsiz -= len;
 1616         }
 1617 nfsmout:
 1618         if (nd->nd_mrep != NULL)
 1619                 mbuf_freem(nd->nd_mrep);
 1620         *iomode = committed;
 1621         if (nd->nd_repstat && !error)
 1622                 error = nd->nd_repstat;
 1623         return (error);
 1624 }
 1625 
 1626 /*
 1627  * nfs mknod rpc
 1628  * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
 1629  * mode set to specify the file type and the size field for rdev.
 1630  */
 1631 APPLESTATIC int
 1632 nfsrpc_mknod(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1633     u_int32_t rdev, enum vtype vtyp, struct ucred *cred, NFSPROC_T *p,
 1634     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1635     int *attrflagp, int *dattrflagp, void *dstuff)
 1636 {
 1637         u_int32_t *tl;
 1638         int error = 0;
 1639         struct nfsrv_descript nfsd, *nd = &nfsd;
 1640         nfsattrbit_t attrbits;
 1641 
 1642         *nfhpp = NULL;
 1643         *attrflagp = 0;
 1644         *dattrflagp = 0;
 1645         if (namelen > NFS_MAXNAMLEN)
 1646                 return (ENAMETOOLONG);
 1647         NFSCL_REQSTART(nd, NFSPROC_MKNOD, dvp);
 1648         if (nd->nd_flag & ND_NFSV4) {
 1649                 if (vtyp == VBLK || vtyp == VCHR) {
 1650                         NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 1651                         *tl++ = vtonfsv34_type(vtyp);
 1652                         *tl++ = txdr_unsigned(NFSMAJOR(rdev));
 1653                         *tl = txdr_unsigned(NFSMINOR(rdev));
 1654                 } else {
 1655                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1656                         *tl = vtonfsv34_type(vtyp);
 1657                 }
 1658         }
 1659         (void) nfsm_strtom(nd, name, namelen);
 1660         if (nd->nd_flag & ND_NFSV3) {
 1661                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1662                 *tl = vtonfsv34_type(vtyp);
 1663         }
 1664         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 1665                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 1666         if ((nd->nd_flag & ND_NFSV3) &&
 1667             (vtyp == VCHR || vtyp == VBLK)) {
 1668                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1669                 *tl++ = txdr_unsigned(NFSMAJOR(rdev));
 1670                 *tl = txdr_unsigned(NFSMINOR(rdev));
 1671         }
 1672         if (nd->nd_flag & ND_NFSV4) {
 1673                 NFSGETATTR_ATTRBIT(&attrbits);
 1674                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1675                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 1676                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1677                 (void) nfsrv_putattrbit(nd, &attrbits);
 1678         }
 1679         if (nd->nd_flag & ND_NFSV2)
 1680                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZERDEV, rdev);
 1681         error = nfscl_request(nd, dvp, p, cred, dstuff);
 1682         if (error)
 1683                 return (error);
 1684         if (nd->nd_flag & ND_NFSV4)
 1685                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1686         if (!nd->nd_repstat) {
 1687                 if (nd->nd_flag & ND_NFSV4) {
 1688                         NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 1689                         error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 1690                         if (error)
 1691                                 goto nfsmout;
 1692                 }
 1693                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 1694                 if (error)
 1695                         goto nfsmout;
 1696         }
 1697         if (nd->nd_flag & ND_NFSV3)
 1698                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1699         if (!error && nd->nd_repstat)
 1700                 error = nd->nd_repstat;
 1701 nfsmout:
 1702         mbuf_freem(nd->nd_mrep);
 1703         return (error);
 1704 }
 1705 
 1706 /*
 1707  * nfs file create call
 1708  * Mostly just call the approriate routine. (I separated out v4, so that
 1709  * error recovery wouldn't be as difficult.)
 1710  */
 1711 APPLESTATIC int
 1712 nfsrpc_create(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1713     nfsquad_t cverf, int fmode, struct ucred *cred, NFSPROC_T *p,
 1714     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1715     int *attrflagp, int *dattrflagp, void *dstuff)
 1716 {
 1717         int error = 0, newone, expireret = 0, retrycnt, unlocked;
 1718         struct nfsclowner *owp;
 1719         struct nfscldeleg *dp;
 1720         struct nfsmount *nmp = VFSTONFS(vnode_mount(dvp));
 1721         u_int32_t clidrev;
 1722 
 1723         if (NFSHASNFSV4(nmp)) {
 1724             retrycnt = 0;
 1725             do {
 1726                 dp = NULL;
 1727                 error = nfscl_open(dvp, NULL, 0, (NFSV4OPEN_ACCESSWRITE |
 1728                     NFSV4OPEN_ACCESSREAD), 0, cred, p, &owp, NULL, &newone,
 1729                     NULL, 1);
 1730                 if (error)
 1731                         return (error);
 1732                 if (nmp->nm_clp != NULL)
 1733                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 1734                 else
 1735                         clidrev = 0;
 1736                 error = nfsrpc_createv4(dvp, name, namelen, vap, cverf, fmode,
 1737                   owp, &dp, cred, p, dnap, nnap, nfhpp, attrflagp, dattrflagp,
 1738                   dstuff, &unlocked);
 1739                 /*
 1740                  * There is no need to invalidate cached attributes here,
 1741                  * since new post-delegation issue attributes are always
 1742                  * returned by nfsrpc_createv4() and these will update the
 1743                  * attribute cache.
 1744                  */
 1745                 if (dp != NULL)
 1746                         (void) nfscl_deleg(nmp->nm_mountp, owp->nfsow_clp,
 1747                             (*nfhpp)->nfh_fh, (*nfhpp)->nfh_len, cred, p, &dp);
 1748                 nfscl_ownerrelease(owp, error, newone, unlocked);
 1749                 if (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
 1750                     error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY) {
 1751                         (void) nfs_catnap(PZERO, error, "nfs_open");
 1752                 } else if ((error == NFSERR_EXPIRED ||
 1753                     error == NFSERR_BADSTATEID) && clidrev != 0) {
 1754                         expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 1755                         retrycnt++;
 1756                 }
 1757             } while (error == NFSERR_GRACE || error == NFSERR_STALECLIENTID ||
 1758                 error == NFSERR_STALEDONTRECOVER || error == NFSERR_DELAY ||
 1759                 ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 1760                  expireret == 0 && clidrev != 0 && retrycnt < 4));
 1761             if (error && retrycnt >= 4)
 1762                     error = EIO;
 1763         } else {
 1764                 error = nfsrpc_createv23(dvp, name, namelen, vap, cverf,
 1765                     fmode, cred, p, dnap, nnap, nfhpp, attrflagp, dattrflagp,
 1766                     dstuff);
 1767         }
 1768         return (error);
 1769 }
 1770 
 1771 /*
 1772  * The create rpc for v2 and 3.
 1773  */
 1774 static int
 1775 nfsrpc_createv23(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1776     nfsquad_t cverf, int fmode, struct ucred *cred, NFSPROC_T *p,
 1777     struct nfsvattr *dnap, struct nfsvattr *nnap, struct nfsfh **nfhpp,
 1778     int *attrflagp, int *dattrflagp, void *dstuff)
 1779 {
 1780         u_int32_t *tl;
 1781         int error = 0;
 1782         struct nfsrv_descript nfsd, *nd = &nfsd;
 1783 
 1784         *nfhpp = NULL;
 1785         *attrflagp = 0;
 1786         *dattrflagp = 0;
 1787         if (namelen > NFS_MAXNAMLEN)
 1788                 return (ENAMETOOLONG);
 1789         NFSCL_REQSTART(nd, NFSPROC_CREATE, dvp);
 1790         (void) nfsm_strtom(nd, name, namelen);
 1791         if (nd->nd_flag & ND_NFSV3) {
 1792                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1793                 if (fmode & O_EXCL) {
 1794                         *tl = txdr_unsigned(NFSCREATE_EXCLUSIVE);
 1795                         NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
 1796                         *tl++ = cverf.lval[0];
 1797                         *tl = cverf.lval[1];
 1798                 } else {
 1799                         *tl = txdr_unsigned(NFSCREATE_UNCHECKED);
 1800                         nfscl_fillsattr(nd, vap, dvp, 0, 0);
 1801                 }
 1802         } else {
 1803                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZE0, 0);
 1804         }
 1805         error = nfscl_request(nd, dvp, p, cred, dstuff);
 1806         if (error)
 1807                 return (error);
 1808         if (nd->nd_repstat == 0) {
 1809                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 1810                 if (error)
 1811                         goto nfsmout;
 1812         }
 1813         if (nd->nd_flag & ND_NFSV3)
 1814                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1815         if (nd->nd_repstat != 0 && error == 0)
 1816                 error = nd->nd_repstat;
 1817 nfsmout:
 1818         mbuf_freem(nd->nd_mrep);
 1819         return (error);
 1820 }
 1821 
 1822 static int
 1823 nfsrpc_createv4(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 1824     nfsquad_t cverf, int fmode, struct nfsclowner *owp, struct nfscldeleg **dpp,
 1825     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 1826     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 1827     int *dattrflagp, void *dstuff, int *unlockedp)
 1828 {
 1829         u_int32_t *tl;
 1830         int error = 0, deleg, newone, ret, acesize, limitby;
 1831         struct nfsrv_descript nfsd, *nd = &nfsd;
 1832         struct nfsclopen *op;
 1833         struct nfscldeleg *dp = NULL;
 1834         struct nfsnode *np;
 1835         struct nfsfh *nfhp;
 1836         nfsattrbit_t attrbits;
 1837         nfsv4stateid_t stateid;
 1838         u_int32_t rflags;
 1839 
 1840         *unlockedp = 0;
 1841         *nfhpp = NULL;
 1842         *dpp = NULL;
 1843         *attrflagp = 0;
 1844         *dattrflagp = 0;
 1845         if (namelen > NFS_MAXNAMLEN)
 1846                 return (ENAMETOOLONG);
 1847         NFSCL_REQSTART(nd, NFSPROC_CREATE, dvp);
 1848         /*
 1849          * For V4, this is actually an Open op.
 1850          */
 1851         NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 1852         *tl++ = txdr_unsigned(owp->nfsow_seqid);
 1853         *tl++ = txdr_unsigned(NFSV4OPEN_ACCESSWRITE |
 1854             NFSV4OPEN_ACCESSREAD);
 1855         *tl++ = txdr_unsigned(NFSV4OPEN_DENYNONE);
 1856         *tl++ = owp->nfsow_clp->nfsc_clientid.lval[0];
 1857         *tl = owp->nfsow_clp->nfsc_clientid.lval[1];
 1858         (void) nfsm_strtom(nd, owp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
 1859         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1860         *tl++ = txdr_unsigned(NFSV4OPEN_CREATE);
 1861         if (fmode & O_EXCL) {
 1862                 *tl = txdr_unsigned(NFSCREATE_EXCLUSIVE);
 1863                 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
 1864                 *tl++ = cverf.lval[0];
 1865                 *tl = cverf.lval[1];
 1866         } else {
 1867                 *tl = txdr_unsigned(NFSCREATE_UNCHECKED);
 1868                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 1869         }
 1870         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 1871         *tl = txdr_unsigned(NFSV4OPEN_CLAIMNULL);
 1872         (void) nfsm_strtom(nd, name, namelen);
 1873         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 1874         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 1875         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 1876         NFSGETATTR_ATTRBIT(&attrbits);
 1877         (void) nfsrv_putattrbit(nd, &attrbits);
 1878         error = nfscl_request(nd, dvp, p, cred, dstuff);
 1879         if (error)
 1880                 return (error);
 1881         error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 1882         if (error)
 1883                 goto nfsmout;
 1884         NFSCL_INCRSEQID(owp->nfsow_seqid, nd);
 1885         if (nd->nd_repstat == 0) {
 1886                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
 1887                     6 * NFSX_UNSIGNED);
 1888                 stateid.seqid = *tl++;
 1889                 stateid.other[0] = *tl++;
 1890                 stateid.other[1] = *tl++;
 1891                 stateid.other[2] = *tl;
 1892                 rflags = fxdr_unsigned(u_int32_t, *(tl + 6));
 1893                 (void) nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 1894                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 1895                 deleg = fxdr_unsigned(int, *tl);
 1896                 if (deleg == NFSV4OPEN_DELEGATEREAD ||
 1897                     deleg == NFSV4OPEN_DELEGATEWRITE) {
 1898                         if (!(owp->nfsow_clp->nfsc_flags &
 1899                               NFSCLFLAGS_FIRSTDELEG))
 1900                                 owp->nfsow_clp->nfsc_flags |=
 1901                                   (NFSCLFLAGS_FIRSTDELEG | NFSCLFLAGS_GOTDELEG);
 1902                         MALLOC(dp, struct nfscldeleg *,
 1903                             sizeof (struct nfscldeleg) + NFSX_V4FHMAX,
 1904                             M_NFSCLDELEG, M_WAITOK);
 1905                         LIST_INIT(&dp->nfsdl_owner);
 1906                         LIST_INIT(&dp->nfsdl_lock);
 1907                         dp->nfsdl_clp = owp->nfsow_clp;
 1908                         newnfs_copyincred(cred, &dp->nfsdl_cred);
 1909                         nfscl_lockinit(&dp->nfsdl_rwlock);
 1910                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
 1911                             NFSX_UNSIGNED);
 1912                         dp->nfsdl_stateid.seqid = *tl++;
 1913                         dp->nfsdl_stateid.other[0] = *tl++;
 1914                         dp->nfsdl_stateid.other[1] = *tl++;
 1915                         dp->nfsdl_stateid.other[2] = *tl++;
 1916                         ret = fxdr_unsigned(int, *tl);
 1917                         if (deleg == NFSV4OPEN_DELEGATEWRITE) {
 1918                                 dp->nfsdl_flags = NFSCLDL_WRITE;
 1919                                 /*
 1920                                  * Indicates how much the file can grow.
 1921                                  */
 1922                                 NFSM_DISSECT(tl, u_int32_t *,
 1923                                     3 * NFSX_UNSIGNED);
 1924                                 limitby = fxdr_unsigned(int, *tl++);
 1925                                 switch (limitby) {
 1926                                 case NFSV4OPEN_LIMITSIZE:
 1927                                         dp->nfsdl_sizelimit = fxdr_hyper(tl);
 1928                                         break;
 1929                                 case NFSV4OPEN_LIMITBLOCKS:
 1930                                         dp->nfsdl_sizelimit =
 1931                                             fxdr_unsigned(u_int64_t, *tl++);
 1932                                         dp->nfsdl_sizelimit *=
 1933                                             fxdr_unsigned(u_int64_t, *tl);
 1934                                         break;
 1935                                 default:
 1936                                         error = NFSERR_BADXDR;
 1937                                         goto nfsmout;
 1938                                 };
 1939                         } else {
 1940                                 dp->nfsdl_flags = NFSCLDL_READ;
 1941                         }
 1942                         if (ret)
 1943                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
 1944                         error = nfsrv_dissectace(nd, &dp->nfsdl_ace, &ret,
 1945                             &acesize, p);
 1946                         if (error)
 1947                                 goto nfsmout;
 1948                 } else if (deleg != NFSV4OPEN_DELEGATENONE) {
 1949                         error = NFSERR_BADXDR;
 1950                         goto nfsmout;
 1951                 }
 1952                 error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 1953                 if (error)
 1954                         goto nfsmout;
 1955                 if (dp != NULL && *attrflagp) {
 1956                         dp->nfsdl_change = nnap->na_filerev;
 1957                         dp->nfsdl_modtime = nnap->na_mtime;
 1958                         dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
 1959                 }
 1960                 /*
 1961                  * We can now complete the Open state.
 1962                  */
 1963                 nfhp = *nfhpp;
 1964                 if (dp != NULL) {
 1965                         dp->nfsdl_fhlen = nfhp->nfh_len;
 1966                         NFSBCOPY(nfhp->nfh_fh, dp->nfsdl_fh, nfhp->nfh_len);
 1967                 }
 1968                 /*
 1969                  * Get an Open structure that will be
 1970                  * attached to the OpenOwner, acquired already.
 1971                  */
 1972                 error = nfscl_open(dvp, nfhp->nfh_fh, nfhp->nfh_len, 
 1973                     (NFSV4OPEN_ACCESSWRITE | NFSV4OPEN_ACCESSREAD), 0,
 1974                     cred, p, NULL, &op, &newone, NULL, 0);
 1975                 if (error)
 1976                         goto nfsmout;
 1977                 op->nfso_stateid = stateid;
 1978                 newnfs_copyincred(cred, &op->nfso_cred);
 1979                 if ((rflags & NFSV4OPEN_RESULTCONFIRM)) {
 1980                     do {
 1981                         ret = nfsrpc_openconfirm(dvp, nfhp->nfh_fh,
 1982                             nfhp->nfh_len, op, cred, p);
 1983                         if (ret == NFSERR_DELAY)
 1984                             (void) nfs_catnap(PZERO, ret, "nfs_create");
 1985                     } while (ret == NFSERR_DELAY);
 1986                     error = ret;
 1987                 }
 1988 
 1989                 /*
 1990                  * If the server is handing out delegations, but we didn't
 1991                  * get one because an OpenConfirm was required, try the
 1992                  * Open again, to get a delegation. This is a harmless no-op,
 1993                  * from a server's point of view.
 1994                  */
 1995                 if ((rflags & NFSV4OPEN_RESULTCONFIRM) &&
 1996                     (owp->nfsow_clp->nfsc_flags & NFSCLFLAGS_GOTDELEG) &&
 1997                     !error && dp == NULL) {
 1998                     np = VTONFS(dvp);
 1999                     do {
 2000                         ret = nfsrpc_openrpc(VFSTONFS(vnode_mount(dvp)), dvp,
 2001                             np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
 2002                             nfhp->nfh_fh, nfhp->nfh_len,
 2003                             (NFSV4OPEN_ACCESSWRITE | NFSV4OPEN_ACCESSREAD), op,
 2004                             name, namelen, &dp, 0, 0x0, cred, p, 0, 1);
 2005                         if (ret == NFSERR_DELAY)
 2006                             (void) nfs_catnap(PZERO, ret, "nfs_crt2");
 2007                     } while (ret == NFSERR_DELAY);
 2008                     if (ret) {
 2009                         if (dp != NULL)
 2010                                 FREE((caddr_t)dp, M_NFSCLDELEG);
 2011                         if (ret == NFSERR_STALECLIENTID ||
 2012                             ret == NFSERR_STALEDONTRECOVER)
 2013                                 error = ret;
 2014                     }
 2015                 }
 2016                 nfscl_openrelease(op, error, newone);
 2017                 *unlockedp = 1;
 2018         }
 2019         if (nd->nd_repstat != 0 && error == 0)
 2020                 error = nd->nd_repstat;
 2021         if (error == NFSERR_STALECLIENTID)
 2022                 nfscl_initiate_recovery(owp->nfsow_clp);
 2023 nfsmout:
 2024         if (!error)
 2025                 *dpp = dp;
 2026         else if (dp != NULL)
 2027                 FREE((caddr_t)dp, M_NFSCLDELEG);
 2028         mbuf_freem(nd->nd_mrep);
 2029         return (error);
 2030 }
 2031 
 2032 /*
 2033  * Nfs remove rpc
 2034  */
 2035 APPLESTATIC int
 2036 nfsrpc_remove(vnode_t dvp, char *name, int namelen, vnode_t vp,
 2037     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap, int *dattrflagp,
 2038     void *dstuff)
 2039 {
 2040         u_int32_t *tl;
 2041         struct nfsrv_descript nfsd, *nd = &nfsd;
 2042         struct nfsnode *np;
 2043         struct nfsmount *nmp;
 2044         nfsv4stateid_t dstateid;
 2045         int error, ret = 0, i;
 2046 
 2047         *dattrflagp = 0;
 2048         if (namelen > NFS_MAXNAMLEN)
 2049                 return (ENAMETOOLONG);
 2050         nmp = VFSTONFS(vnode_mount(dvp));
 2051 tryagain:
 2052         if (NFSHASNFSV4(nmp) && ret == 0) {
 2053                 ret = nfscl_removedeleg(vp, p, &dstateid);
 2054                 if (ret == 1) {
 2055                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGREMOVE, vp);
 2056                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID +
 2057                             NFSX_UNSIGNED);
 2058                         *tl++ = dstateid.seqid;
 2059                         *tl++ = dstateid.other[0];
 2060                         *tl++ = dstateid.other[1];
 2061                         *tl++ = dstateid.other[2];
 2062                         *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2063                         np = VTONFS(dvp);
 2064                         (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2065                             np->n_fhp->nfh_len, 0);
 2066                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2067                         *tl = txdr_unsigned(NFSV4OP_REMOVE);
 2068                 }
 2069         } else {
 2070                 ret = 0;
 2071         }
 2072         if (ret == 0)
 2073                 NFSCL_REQSTART(nd, NFSPROC_REMOVE, dvp);
 2074         (void) nfsm_strtom(nd, name, namelen);
 2075         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2076         if (error)
 2077                 return (error);
 2078         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 2079                 /* For NFSv4, parse out any Delereturn replies. */
 2080                 if (ret > 0 && nd->nd_repstat != 0 &&
 2081                     (nd->nd_flag & ND_NOMOREDATA)) {
 2082                         /*
 2083                          * If the Delegreturn failed, try again without
 2084                          * it. The server will Recall, as required.
 2085                          */
 2086                         mbuf_freem(nd->nd_mrep);
 2087                         goto tryagain;
 2088                 }
 2089                 for (i = 0; i < (ret * 2); i++) {
 2090                         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) ==
 2091                             ND_NFSV4) {
 2092                             NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2093                             if (*(tl + 1))
 2094                                 nd->nd_flag |= ND_NOMOREDATA;
 2095                         }
 2096                 }
 2097                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2098         }
 2099         if (nd->nd_repstat && !error)
 2100                 error = nd->nd_repstat;
 2101 nfsmout:
 2102         mbuf_freem(nd->nd_mrep);
 2103         return (error);
 2104 }
 2105 
 2106 /*
 2107  * Do an nfs rename rpc.
 2108  */
 2109 APPLESTATIC int
 2110 nfsrpc_rename(vnode_t fdvp, vnode_t fvp, char *fnameptr, int fnamelen,
 2111     vnode_t tdvp, vnode_t tvp, char *tnameptr, int tnamelen, struct ucred *cred,
 2112     NFSPROC_T *p, struct nfsvattr *fnap, struct nfsvattr *tnap,
 2113     int *fattrflagp, int *tattrflagp, void *fstuff, void *tstuff)
 2114 {
 2115         u_int32_t *tl;
 2116         struct nfsrv_descript nfsd, *nd = &nfsd;
 2117         struct nfsmount *nmp;
 2118         struct nfsnode *np;
 2119         nfsattrbit_t attrbits;
 2120         nfsv4stateid_t fdstateid, tdstateid;
 2121         int error = 0, ret = 0, gottd = 0, gotfd = 0, i;
 2122         
 2123         *fattrflagp = 0;
 2124         *tattrflagp = 0;
 2125         nmp = VFSTONFS(vnode_mount(fdvp));
 2126         if (fnamelen > NFS_MAXNAMLEN || tnamelen > NFS_MAXNAMLEN)
 2127                 return (ENAMETOOLONG);
 2128 tryagain:
 2129         if (NFSHASNFSV4(nmp) && ret == 0) {
 2130                 ret = nfscl_renamedeleg(fvp, &fdstateid, &gotfd, tvp,
 2131                     &tdstateid, &gottd, p);
 2132                 if (gotfd && gottd) {
 2133                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME2, fvp);
 2134                 } else if (gotfd) {
 2135                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME1, fvp);
 2136                 } else if (gottd) {
 2137                         NFSCL_REQSTART(nd, NFSPROC_RETDELEGRENAME1, tvp);
 2138                 }
 2139                 if (gotfd) {
 2140                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 2141                         *tl++ = fdstateid.seqid;
 2142                         *tl++ = fdstateid.other[0];
 2143                         *tl++ = fdstateid.other[1];
 2144                         *tl = fdstateid.other[2];
 2145                         if (gottd) {
 2146                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2147                                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2148                                 np = VTONFS(tvp);
 2149                                 (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2150                                     np->n_fhp->nfh_len, 0);
 2151                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2152                                 *tl = txdr_unsigned(NFSV4OP_DELEGRETURN);
 2153                         }
 2154                 }
 2155                 if (gottd) {
 2156                         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 2157                         *tl++ = tdstateid.seqid;
 2158                         *tl++ = tdstateid.other[0];
 2159                         *tl++ = tdstateid.other[1];
 2160                         *tl = tdstateid.other[2];
 2161                 }
 2162                 if (ret > 0) {
 2163                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2164                         *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2165                         np = VTONFS(fdvp);
 2166                         (void) nfsm_fhtom(nd, np->n_fhp->nfh_fh,
 2167                             np->n_fhp->nfh_len, 0);
 2168                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2169                         *tl = txdr_unsigned(NFSV4OP_SAVEFH);
 2170                 }
 2171         } else {
 2172                 ret = 0;
 2173         }
 2174         if (ret == 0)
 2175                 NFSCL_REQSTART(nd, NFSPROC_RENAME, fdvp);
 2176         if (nd->nd_flag & ND_NFSV4) {
 2177                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2178                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2179                 NFSWCCATTR_ATTRBIT(&attrbits);
 2180                 (void) nfsrv_putattrbit(nd, &attrbits);
 2181                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2182                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2183                 (void) nfsm_fhtom(nd, VTONFS(tdvp)->n_fhp->nfh_fh,
 2184                     VTONFS(tdvp)->n_fhp->nfh_len, 0);
 2185                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2186                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2187                 (void) nfsrv_putattrbit(nd, &attrbits);
 2188                 nd->nd_flag |= ND_V4WCCATTR;
 2189                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2190                 *tl = txdr_unsigned(NFSV4OP_RENAME);
 2191         }
 2192         (void) nfsm_strtom(nd, fnameptr, fnamelen);
 2193         if (!(nd->nd_flag & ND_NFSV4))
 2194                 (void) nfsm_fhtom(nd, VTONFS(tdvp)->n_fhp->nfh_fh,
 2195                         VTONFS(tdvp)->n_fhp->nfh_len, 0);
 2196         (void) nfsm_strtom(nd, tnameptr, tnamelen);
 2197         error = nfscl_request(nd, fdvp, p, cred, fstuff);
 2198         if (error)
 2199                 return (error);
 2200         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
 2201                 /* For NFSv4, parse out any Delereturn replies. */
 2202                 if (ret > 0 && nd->nd_repstat != 0 &&
 2203                     (nd->nd_flag & ND_NOMOREDATA)) {
 2204                         /*
 2205                          * If the Delegreturn failed, try again without
 2206                          * it. The server will Recall, as required.
 2207                          */
 2208                         mbuf_freem(nd->nd_mrep);
 2209                         goto tryagain;
 2210                 }
 2211                 for (i = 0; i < (ret * 2); i++) {
 2212                         if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) ==
 2213                             ND_NFSV4) {
 2214                             NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2215                             if (*(tl + 1)) {
 2216                                 if (i == 0 && ret > 1) {
 2217                                     /*
 2218                                      * If the Delegreturn failed, try again
 2219                                      * without it. The server will Recall, as
 2220                                      * required.
 2221                                      * If ret > 1, the first iteration of this
 2222                                      * loop is the second DelegReturn result.
 2223                                      */
 2224                                     mbuf_freem(nd->nd_mrep);
 2225                                     goto tryagain;
 2226                                 } else {
 2227                                     nd->nd_flag |= ND_NOMOREDATA;
 2228                                 }
 2229                             }
 2230                         }
 2231                 }
 2232                 /* Now, the first wcc attribute reply. */
 2233                 if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 2234                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2235                         if (*(tl + 1))
 2236                                 nd->nd_flag |= ND_NOMOREDATA;
 2237                 }
 2238                 error = nfscl_wcc_data(nd, fdvp, fnap, fattrflagp, NULL,
 2239                     fstuff);
 2240                 /* and the second wcc attribute reply. */
 2241                 if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4 &&
 2242                     !error) {
 2243                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2244                         if (*(tl + 1))
 2245                                 nd->nd_flag |= ND_NOMOREDATA;
 2246                 }
 2247                 if (!error)
 2248                         error = nfscl_wcc_data(nd, tdvp, tnap, tattrflagp,
 2249                             NULL, tstuff);
 2250         }
 2251         if (nd->nd_repstat && !error)
 2252                 error = nd->nd_repstat;
 2253 nfsmout:
 2254         mbuf_freem(nd->nd_mrep);
 2255         return (error);
 2256 }
 2257 
 2258 /*
 2259  * nfs hard link create rpc
 2260  */
 2261 APPLESTATIC int
 2262 nfsrpc_link(vnode_t dvp, vnode_t vp, char *name, int namelen,
 2263     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2264     struct nfsvattr *nap, int *attrflagp, int *dattrflagp, void *dstuff)
 2265 {
 2266         u_int32_t *tl;
 2267         struct nfsrv_descript nfsd, *nd = &nfsd;
 2268         nfsattrbit_t attrbits;
 2269         int error = 0;
 2270 
 2271         *attrflagp = 0;
 2272         *dattrflagp = 0;
 2273         if (namelen > NFS_MAXNAMLEN)
 2274                 return (ENAMETOOLONG);
 2275         NFSCL_REQSTART(nd, NFSPROC_LINK, vp);
 2276         if (nd->nd_flag & ND_NFSV4) {
 2277                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2278                 *tl = txdr_unsigned(NFSV4OP_PUTFH);
 2279         }
 2280         (void) nfsm_fhtom(nd, VTONFS(dvp)->n_fhp->nfh_fh,
 2281                 VTONFS(dvp)->n_fhp->nfh_len, 0);
 2282         if (nd->nd_flag & ND_NFSV4) {
 2283                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2284                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2285                 NFSWCCATTR_ATTRBIT(&attrbits);
 2286                 (void) nfsrv_putattrbit(nd, &attrbits);
 2287                 nd->nd_flag |= ND_V4WCCATTR;
 2288                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2289                 *tl = txdr_unsigned(NFSV4OP_LINK);
 2290         }
 2291         (void) nfsm_strtom(nd, name, namelen);
 2292         error = nfscl_request(nd, vp, p, cred, dstuff);
 2293         if (error)
 2294                 return (error);
 2295         if (nd->nd_flag & ND_NFSV3) {
 2296                 error = nfscl_postop_attr(nd, nap, attrflagp, dstuff);
 2297                 if (!error)
 2298                         error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp,
 2299                             NULL, dstuff);
 2300         } else if ((nd->nd_flag & (ND_NFSV4 | ND_NOMOREDATA)) == ND_NFSV4) {
 2301                 /*
 2302                  * First, parse out the PutFH and Getattr result.
 2303                  */
 2304                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2305                 if (!(*(tl + 1)))
 2306                         NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2307                 if (*(tl + 1))
 2308                         nd->nd_flag |= ND_NOMOREDATA;
 2309                 /*
 2310                  * Get the pre-op attributes.
 2311                  */
 2312                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2313         }
 2314         if (nd->nd_repstat && !error)
 2315                 error = nd->nd_repstat;
 2316 nfsmout:
 2317         mbuf_freem(nd->nd_mrep);
 2318         return (error);
 2319 }
 2320 
 2321 /*
 2322  * nfs symbolic link create rpc
 2323  */
 2324 APPLESTATIC int
 2325 nfsrpc_symlink(vnode_t dvp, char *name, int namelen, char *target,
 2326     struct vattr *vap, struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2327     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 2328     int *dattrflagp, void *dstuff)
 2329 {
 2330         u_int32_t *tl;
 2331         struct nfsrv_descript nfsd, *nd = &nfsd;
 2332         struct nfsmount *nmp;
 2333         int slen, error = 0;
 2334 
 2335         *nfhpp = NULL;
 2336         *attrflagp = 0;
 2337         *dattrflagp = 0;
 2338         nmp = VFSTONFS(vnode_mount(dvp));
 2339         slen = strlen(target);
 2340         if (slen > NFS_MAXPATHLEN || namelen > NFS_MAXNAMLEN)
 2341                 return (ENAMETOOLONG);
 2342         NFSCL_REQSTART(nd, NFSPROC_SYMLINK, dvp);
 2343         if (nd->nd_flag & ND_NFSV4) {
 2344                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2345                 *tl = txdr_unsigned(NFLNK);
 2346                 (void) nfsm_strtom(nd, target, slen);
 2347         }
 2348         (void) nfsm_strtom(nd, name, namelen);
 2349         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 2350                 nfscl_fillsattr(nd, vap, dvp, 0, 0);
 2351         if (!(nd->nd_flag & ND_NFSV4))
 2352                 (void) nfsm_strtom(nd, target, slen);
 2353         if (nd->nd_flag & ND_NFSV2)
 2354                 nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZENEG1, 0);
 2355         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2356         if (error)
 2357                 return (error);
 2358         if (nd->nd_flag & ND_NFSV4)
 2359                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2360         if ((nd->nd_flag & ND_NFSV3) && !error) {
 2361                 if (!nd->nd_repstat)
 2362                         error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2363                 if (!error)
 2364                         error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp,
 2365                             NULL, dstuff);
 2366         }
 2367         if (nd->nd_repstat && !error)
 2368                 error = nd->nd_repstat;
 2369         mbuf_freem(nd->nd_mrep);
 2370         /*
 2371          * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
 2372          */
 2373         if (error == EEXIST)
 2374                 error = 0;
 2375         return (error);
 2376 }
 2377 
 2378 /*
 2379  * nfs make dir rpc
 2380  */
 2381 APPLESTATIC int
 2382 nfsrpc_mkdir(vnode_t dvp, char *name, int namelen, struct vattr *vap,
 2383     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *dnap,
 2384     struct nfsvattr *nnap, struct nfsfh **nfhpp, int *attrflagp,
 2385     int *dattrflagp, void *dstuff)
 2386 {
 2387         u_int32_t *tl;
 2388         struct nfsrv_descript nfsd, *nd = &nfsd;
 2389         nfsattrbit_t attrbits;
 2390         int error = 0;
 2391 
 2392         *nfhpp = NULL;
 2393         *attrflagp = 0;
 2394         *dattrflagp = 0;
 2395         if (namelen > NFS_MAXNAMLEN)
 2396                 return (ENAMETOOLONG);
 2397         NFSCL_REQSTART(nd, NFSPROC_MKDIR, dvp);
 2398         if (nd->nd_flag & ND_NFSV4) {
 2399                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2400                 *tl = txdr_unsigned(NFDIR);
 2401         }
 2402         (void) nfsm_strtom(nd, name, namelen);
 2403         nfscl_fillsattr(nd, vap, dvp, NFSSATTR_SIZENEG1, 0);
 2404         if (nd->nd_flag & ND_NFSV4) {
 2405                 NFSGETATTR_ATTRBIT(&attrbits);
 2406                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2407                 *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 2408                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2409                 (void) nfsrv_putattrbit(nd, &attrbits);
 2410         }
 2411         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2412         if (error)
 2413                 return (error);
 2414         if (nd->nd_flag & ND_NFSV4)
 2415                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2416         if (!nd->nd_repstat && !error) {
 2417                 if (nd->nd_flag & ND_NFSV4) {
 2418                         NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
 2419                         error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
 2420                 }
 2421                 if (!error)
 2422                         error = nfscl_mtofh(nd, nfhpp, nnap, attrflagp);
 2423         }
 2424         if ((nd->nd_flag & ND_NFSV3) && !error)
 2425                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2426         if (nd->nd_repstat && !error)
 2427                 error = nd->nd_repstat;
 2428 nfsmout:
 2429         mbuf_freem(nd->nd_mrep);
 2430         /*
 2431          * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry.
 2432          */
 2433         if (error == EEXIST)
 2434                 error = 0;
 2435         return (error);
 2436 }
 2437 
 2438 /*
 2439  * nfs remove directory call
 2440  */
 2441 APPLESTATIC int
 2442 nfsrpc_rmdir(vnode_t dvp, char *name, int namelen, struct ucred *cred,
 2443     NFSPROC_T *p, struct nfsvattr *dnap, int *dattrflagp, void *dstuff)
 2444 {
 2445         struct nfsrv_descript nfsd, *nd = &nfsd;
 2446         int error = 0;
 2447 
 2448         *dattrflagp = 0;
 2449         if (namelen > NFS_MAXNAMLEN)
 2450                 return (ENAMETOOLONG);
 2451         NFSCL_REQSTART(nd, NFSPROC_RMDIR, dvp);
 2452         (void) nfsm_strtom(nd, name, namelen);
 2453         error = nfscl_request(nd, dvp, p, cred, dstuff);
 2454         if (error)
 2455                 return (error);
 2456         if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4))
 2457                 error = nfscl_wcc_data(nd, dvp, dnap, dattrflagp, NULL, dstuff);
 2458         if (nd->nd_repstat && !error)
 2459                 error = nd->nd_repstat;
 2460         mbuf_freem(nd->nd_mrep);
 2461         /*
 2462          * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
 2463          */
 2464         if (error == ENOENT)
 2465                 error = 0;
 2466         return (error);
 2467 }
 2468 
 2469 /*
 2470  * Readdir rpc.
 2471  * Always returns with either uio_resid unchanged, if you are at the
 2472  * end of the directory, or uio_resid == 0, with all DIRBLKSIZ chunks
 2473  * filled in.
 2474  * I felt this would allow caching of directory blocks more easily
 2475  * than returning a pertially filled block.
 2476  * Directory offset cookies:
 2477  * Oh my, what to do with them...
 2478  * I can think of three ways to deal with them:
 2479  * 1 - have the layer above these RPCs maintain a map between logical
 2480  *     directory byte offsets and the NFS directory offset cookies
 2481  * 2 - pass the opaque directory offset cookies up into userland
 2482  *     and let the libc functions deal with them, via the system call
 2483  * 3 - return them to userland in the "struct dirent", so future versions
 2484  *     of libc can use them and do whatever is necessary to amke things work
 2485  *     above these rpc calls, in the meantime
 2486  * For now, I do #3 by "hiding" the directory offset cookies after the
 2487  * d_name field in struct dirent. This is space inside d_reclen that
 2488  * will be ignored by anything that doesn't know about them.
 2489  * The directory offset cookies are filled in as the last 8 bytes of
 2490  * each directory entry, after d_name. Someday, the userland libc
 2491  * functions may be able to use these. In the meantime, it satisfies
 2492  * OpenBSD's requirements for cookies being returned.
 2493  * If expects the directory offset cookie for the read to be in uio_offset
 2494  * and returns the one for the next entry after this directory block in
 2495  * there, as well.
 2496  */
 2497 APPLESTATIC int
 2498 nfsrpc_readdir(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
 2499     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 2500     int *eofp, void *stuff)
 2501 {
 2502         int len, left;
 2503         struct dirent *dp = NULL;
 2504         u_int32_t *tl;
 2505         nfsquad_t cookie, ncookie;
 2506         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 2507         struct nfsnode *dnp = VTONFS(vp);
 2508         struct nfsvattr nfsva;
 2509         struct nfsrv_descript nfsd, *nd = &nfsd;
 2510         int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
 2511         int reqsize, tryformoredirs = 1, readsize, eof = 0, gotmnton = 0;
 2512         long dotfileid, dotdotfileid = 0;
 2513         u_int32_t fakefileno = 0xffffffff, rderr;
 2514         char *cp;
 2515         nfsattrbit_t attrbits, dattrbits;
 2516         u_int32_t *tl2 = NULL;
 2517         size_t tresid;
 2518 
 2519         KASSERT(uiop->uio_iovcnt == 1 &&
 2520             (uio_uio_resid(uiop) & (DIRBLKSIZ - 1)) == 0,
 2521             ("nfs readdirrpc bad uio"));
 2522 
 2523         /*
 2524          * There is no point in reading a lot more than uio_resid, however
 2525          * adding one additional DIRBLKSIZ makes sense. Since uio_resid
 2526          * and nm_readdirsize are both exact multiples of DIRBLKSIZ, this
 2527          * will never make readsize > nm_readdirsize.
 2528          */
 2529         readsize = nmp->nm_readdirsize;
 2530         if (readsize > uio_uio_resid(uiop))
 2531                 readsize = uio_uio_resid(uiop) + DIRBLKSIZ;
 2532 
 2533         *attrflagp = 0;
 2534         if (eofp)
 2535                 *eofp = 0;
 2536         tresid = uio_uio_resid(uiop);
 2537         cookie.lval[0] = cookiep->nfsuquad[0];
 2538         cookie.lval[1] = cookiep->nfsuquad[1];
 2539         nd->nd_mrep = NULL;
 2540 
 2541         /*
 2542          * For NFSv4, first create the "." and ".." entries.
 2543          */
 2544         if (NFSHASNFSV4(nmp)) {
 2545                 reqsize = 6 * NFSX_UNSIGNED;
 2546                 NFSGETATTR_ATTRBIT(&dattrbits);
 2547                 NFSZERO_ATTRBIT(&attrbits);
 2548                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FILEID);
 2549                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TYPE);
 2550                 if (NFSISSET_ATTRBIT(&dnp->n_vattr.na_suppattr,
 2551                     NFSATTRBIT_MOUNTEDONFILEID)) {
 2552                         NFSSETBIT_ATTRBIT(&attrbits,
 2553                             NFSATTRBIT_MOUNTEDONFILEID);
 2554                         gotmnton = 1;
 2555                 } else {
 2556                         /*
 2557                          * Must fake it. Use the fileno, except when the
 2558                          * fsid is != to that of the directory. For that
 2559                          * case, generate a fake fileno that is not the same.
 2560                          */
 2561                         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FSID);
 2562                         gotmnton = 0;
 2563                 }
 2564 
 2565                 /*
 2566                  * Joy, oh joy. For V4 we get to hand craft '.' and '..'.
 2567                  */
 2568                 if (uiop->uio_offset == 0) {
 2569 #if defined(__FreeBSD_version) && __FreeBSD_version >= 800000
 2570                         error = VOP_GETATTR(vp, &nfsva.na_vattr, cred);
 2571 #else
 2572                         error = VOP_GETATTR(vp, &nfsva.na_vattr, cred, p);
 2573 #endif
 2574                         if (error)
 2575                             return (error);
 2576                         dotfileid = nfsva.na_fileid;
 2577                         NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, vp);
 2578                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2579                         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 2580                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2581                         (void) nfsrv_putattrbit(nd, &attrbits);
 2582                         error = nfscl_request(nd, vp, p, cred, stuff);
 2583                         if (error)
 2584                             return (error);
 2585                         if (nd->nd_repstat == 0) {
 2586                             NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 2587                             len = fxdr_unsigned(int, *(tl + 2));
 2588                             if (len > 0 && len <= NFSX_V4FHMAX)
 2589                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 2590                             else
 2591                                 error = EPERM;
 2592                             if (!error) {
 2593                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 2594                                 nfsva.na_mntonfileno = 0xffffffff;
 2595                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 2596                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 2597                                     NULL, NULL, NULL, p, cred);
 2598                                 if (error) {
 2599                                     dotdotfileid = dotfileid;
 2600                                 } else if (gotmnton) {
 2601                                     if (nfsva.na_mntonfileno != 0xffffffff)
 2602                                         dotdotfileid = nfsva.na_mntonfileno;
 2603                                     else
 2604                                         dotdotfileid = nfsva.na_fileid;
 2605                                 } else if (nfsva.na_filesid[0] ==
 2606                                     dnp->n_vattr.na_filesid[0] &&
 2607                                     nfsva.na_filesid[1] ==
 2608                                     dnp->n_vattr.na_filesid[1]) {
 2609                                     dotdotfileid = nfsva.na_fileid;
 2610                                 } else {
 2611                                     do {
 2612                                         fakefileno--;
 2613                                     } while (fakefileno ==
 2614                                         nfsva.na_fileid);
 2615                                     dotdotfileid = fakefileno;
 2616                                 }
 2617                             }
 2618                         } else if (nd->nd_repstat == NFSERR_NOENT) {
 2619                             /*
 2620                              * Lookupp returns NFSERR_NOENT when we are
 2621                              * at the root, so just use the current dir.
 2622                              */
 2623                             nd->nd_repstat = 0;
 2624                             dotdotfileid = dotfileid;
 2625                         } else {
 2626                             error = nd->nd_repstat;
 2627                         }
 2628                         mbuf_freem(nd->nd_mrep);
 2629                         if (error)
 2630                             return (error);
 2631                         nd->nd_mrep = NULL;
 2632                         dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2633                         dp->d_type = DT_DIR;
 2634                         dp->d_fileno = dotfileid;
 2635                         dp->d_namlen = 1;
 2636                         dp->d_name[0] = '.';
 2637                         dp->d_name[1] = '\0';
 2638                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 2639                         /*
 2640                          * Just make these offset cookie 0.
 2641                          */
 2642                         tl = (u_int32_t *)&dp->d_name[4];
 2643                         *tl++ = 0;
 2644                         *tl = 0;
 2645                         blksiz += dp->d_reclen;
 2646                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 2647                         uiop->uio_offset += dp->d_reclen;
 2648                         uio_iov_base_add(uiop, dp->d_reclen);
 2649                         uio_iov_len_add(uiop, -(dp->d_reclen));
 2650                         dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2651                         dp->d_type = DT_DIR;
 2652                         dp->d_fileno = dotdotfileid;
 2653                         dp->d_namlen = 2;
 2654                         dp->d_name[0] = '.';
 2655                         dp->d_name[1] = '.';
 2656                         dp->d_name[2] = '\0';
 2657                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 2658                         /*
 2659                          * Just make these offset cookie 0.
 2660                          */
 2661                         tl = (u_int32_t *)&dp->d_name[4];
 2662                         *tl++ = 0;
 2663                         *tl = 0;
 2664                         blksiz += dp->d_reclen;
 2665                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 2666                         uiop->uio_offset += dp->d_reclen;
 2667                         uio_iov_base_add(uiop, dp->d_reclen);
 2668                         uio_iov_len_add(uiop, -(dp->d_reclen));
 2669                 }
 2670                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_RDATTRERROR);
 2671         } else {
 2672                 reqsize = 5 * NFSX_UNSIGNED;
 2673         }
 2674 
 2675 
 2676         /*
 2677          * Loop around doing readdir rpc's of size readsize.
 2678          * The stopping criteria is EOF or buffer full.
 2679          */
 2680         while (more_dirs && bigenough) {
 2681                 *attrflagp = 0;
 2682                 NFSCL_REQSTART(nd, NFSPROC_READDIR, vp);
 2683                 if (nd->nd_flag & ND_NFSV2) {
 2684                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 2685                         *tl++ = cookie.lval[1];
 2686                         *tl = txdr_unsigned(readsize);
 2687                 } else {
 2688                         NFSM_BUILD(tl, u_int32_t *, reqsize);
 2689                         *tl++ = cookie.lval[0];
 2690                         *tl++ = cookie.lval[1];
 2691                         if (cookie.qval == 0) {
 2692                                 *tl++ = 0;
 2693                                 *tl++ = 0;
 2694                         } else {
 2695                                 NFSLOCKNODE(dnp);
 2696                                 *tl++ = dnp->n_cookieverf.nfsuquad[0];
 2697                                 *tl++ = dnp->n_cookieverf.nfsuquad[1];
 2698                                 NFSUNLOCKNODE(dnp);
 2699                         }
 2700                         if (nd->nd_flag & ND_NFSV4) {
 2701                                 *tl++ = txdr_unsigned(readsize);
 2702                                 *tl = txdr_unsigned(readsize);
 2703                                 (void) nfsrv_putattrbit(nd, &attrbits);
 2704                                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 2705                                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 2706                                 (void) nfsrv_putattrbit(nd, &dattrbits);
 2707                         } else {
 2708                                 *tl = txdr_unsigned(readsize);
 2709                         }
 2710                 }
 2711                 error = nfscl_request(nd, vp, p, cred, stuff);
 2712                 if (error)
 2713                         return (error);
 2714                 if (!(nd->nd_flag & ND_NFSV2)) {
 2715                         if (nd->nd_flag & ND_NFSV3)
 2716                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 2717                                     stuff);
 2718                         if (!nd->nd_repstat && !error) {
 2719                                 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
 2720                                 NFSLOCKNODE(dnp);
 2721                                 dnp->n_cookieverf.nfsuquad[0] = *tl++;
 2722                                 dnp->n_cookieverf.nfsuquad[1] = *tl;
 2723                                 NFSUNLOCKNODE(dnp);
 2724                         }
 2725                 }
 2726                 if (nd->nd_repstat || error) {
 2727                         if (!error)
 2728                                 error = nd->nd_repstat;
 2729                         goto nfsmout;
 2730                 }
 2731                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 2732                 more_dirs = fxdr_unsigned(int, *tl);
 2733                 if (!more_dirs)
 2734                         tryformoredirs = 0;
 2735         
 2736                 /* loop thru the dir entries, doctoring them to 4bsd form */
 2737                 while (more_dirs && bigenough) {
 2738                         if (nd->nd_flag & ND_NFSV4) {
 2739                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 2740                                 ncookie.lval[0] = *tl++;
 2741                                 ncookie.lval[1] = *tl++;
 2742                                 len = fxdr_unsigned(int, *tl);
 2743                         } else if (nd->nd_flag & ND_NFSV3) {
 2744                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 2745                                 nfsva.na_fileid = fxdr_hyper(tl);
 2746                                 tl += 2;
 2747                                 len = fxdr_unsigned(int, *tl);
 2748                         } else {
 2749                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 2750                                 nfsva.na_fileid =
 2751                                     fxdr_unsigned(long, *tl++);
 2752                                 len = fxdr_unsigned(int, *tl);
 2753                         }
 2754                         if (len <= 0 || len > NFS_MAXNAMLEN) {
 2755                                 error = EBADRPC;
 2756                                 goto nfsmout;
 2757                         }
 2758                         tlen = NFSM_RNDUP(len);
 2759                         if (tlen == len)
 2760                                 tlen += 4;  /* To ensure null termination */
 2761                         left = DIRBLKSIZ - blksiz;
 2762                         if ((int)(tlen + DIRHDSIZ + NFSX_HYPER) > left) {
 2763                                 dp->d_reclen += left;
 2764                                 uio_iov_base_add(uiop, left);
 2765                                 uio_iov_len_add(uiop, -(left));
 2766                                 uio_uio_resid_add(uiop, -(left));
 2767                                 uiop->uio_offset += left;
 2768                                 blksiz = 0;
 2769                         }
 2770                         if ((int)(tlen + DIRHDSIZ + NFSX_HYPER) > uio_uio_resid(uiop))
 2771                                 bigenough = 0;
 2772                         if (bigenough) {
 2773                                 dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2774                                 dp->d_namlen = len;
 2775                                 dp->d_reclen = tlen + DIRHDSIZ + NFSX_HYPER;
 2776                                 dp->d_type = DT_UNKNOWN;
 2777                                 blksiz += dp->d_reclen;
 2778                                 if (blksiz == DIRBLKSIZ)
 2779                                         blksiz = 0;
 2780                                 uio_uio_resid_add(uiop, -(DIRHDSIZ));
 2781                                 uiop->uio_offset += DIRHDSIZ;
 2782                                 uio_iov_base_add(uiop, DIRHDSIZ);
 2783                                 uio_iov_len_add(uiop, -(DIRHDSIZ));
 2784                                 error = nfsm_mbufuio(nd, uiop, len);
 2785                                 if (error)
 2786                                         goto nfsmout;
 2787                                 cp = CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2788                                 tlen -= len;
 2789                                 *cp = '\0';     /* null terminate */
 2790                                 cp += tlen;     /* points to cookie storage */
 2791                                 tl2 = (u_int32_t *)cp;
 2792                                 uio_iov_base_add(uiop, (tlen + NFSX_HYPER));
 2793                                 uio_iov_len_add(uiop, -(tlen + NFSX_HYPER));
 2794                                 uio_uio_resid_add(uiop, -(tlen + NFSX_HYPER));
 2795                                 uiop->uio_offset += (tlen + NFSX_HYPER);
 2796                         } else {
 2797                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 2798                                 if (error)
 2799                                         goto nfsmout;
 2800                         }
 2801                         if (nd->nd_flag & ND_NFSV4) {
 2802                                 rderr = 0;
 2803                                 nfsva.na_mntonfileno = 0xffffffff;
 2804                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 2805                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 2806                                     NULL, NULL, &rderr, p, cred);
 2807                                 if (error)
 2808                                         goto nfsmout;
 2809                                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 2810                         } else if (nd->nd_flag & ND_NFSV3) {
 2811                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 2812                                 ncookie.lval[0] = *tl++;
 2813                                 ncookie.lval[1] = *tl++;
 2814                         } else {
 2815                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 2816                                 ncookie.lval[0] = 0;
 2817                                 ncookie.lval[1] = *tl++;
 2818                         }
 2819                         if (bigenough) {
 2820                             if (nd->nd_flag & ND_NFSV4) {
 2821                                 if (rderr) {
 2822                                     dp->d_fileno = 0;
 2823                                 } else {
 2824                                     if (gotmnton) {
 2825                                         if (nfsva.na_mntonfileno != 0xffffffff)
 2826                                             dp->d_fileno = nfsva.na_mntonfileno;
 2827                                         else
 2828                                             dp->d_fileno = nfsva.na_fileid;
 2829                                     } else if (nfsva.na_filesid[0] ==
 2830                                         dnp->n_vattr.na_filesid[0] &&
 2831                                         nfsva.na_filesid[1] ==
 2832                                         dnp->n_vattr.na_filesid[1]) {
 2833                                         dp->d_fileno = nfsva.na_fileid;
 2834                                     } else {
 2835                                         do {
 2836                                             fakefileno--;
 2837                                         } while (fakefileno ==
 2838                                             nfsva.na_fileid);
 2839                                         dp->d_fileno = fakefileno;
 2840                                     }
 2841                                     dp->d_type = vtonfs_dtype(nfsva.na_type);
 2842                                 }
 2843                             } else {
 2844                                 dp->d_fileno = nfsva.na_fileid;
 2845                             }
 2846                             *tl2++ = cookiep->nfsuquad[0] = cookie.lval[0] =
 2847                                 ncookie.lval[0];
 2848                             *tl2 = cookiep->nfsuquad[1] = cookie.lval[1] =
 2849                                 ncookie.lval[1];
 2850                         }
 2851                         more_dirs = fxdr_unsigned(int, *tl);
 2852                 }
 2853                 /*
 2854                  * If at end of rpc data, get the eof boolean
 2855                  */
 2856                 if (!more_dirs) {
 2857                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 2858                         eof = fxdr_unsigned(int, *tl);
 2859                         if (tryformoredirs)
 2860                                 more_dirs = !eof;
 2861                         if (nd->nd_flag & ND_NFSV4) {
 2862                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 2863                                     stuff);
 2864                                 if (error)
 2865                                         goto nfsmout;
 2866                         }
 2867                 }
 2868                 mbuf_freem(nd->nd_mrep);
 2869                 nd->nd_mrep = NULL;
 2870         }
 2871         /*
 2872          * Fill last record, iff any, out to a multiple of DIRBLKSIZ
 2873          * by increasing d_reclen for the last record.
 2874          */
 2875         if (blksiz > 0) {
 2876                 left = DIRBLKSIZ - blksiz;
 2877                 dp->d_reclen += left;
 2878                 uio_iov_base_add(uiop, left);
 2879                 uio_iov_len_add(uiop, -(left));
 2880                 uio_uio_resid_add(uiop, -(left));
 2881                 uiop->uio_offset += left;
 2882         }
 2883 
 2884         /*
 2885          * If returning no data, assume end of file.
 2886          * If not bigenough, return not end of file, since you aren't
 2887          *    returning all the data
 2888          * Otherwise, return the eof flag from the server.
 2889          */
 2890         if (eofp) {
 2891                 if (tresid == ((size_t)(uio_uio_resid(uiop))))
 2892                         *eofp = 1;
 2893                 else if (!bigenough)
 2894                         *eofp = 0;
 2895                 else
 2896                         *eofp = eof;
 2897         }
 2898 
 2899         /*
 2900          * Add extra empty records to any remaining DIRBLKSIZ chunks.
 2901          */
 2902         while (uio_uio_resid(uiop) > 0 && ((size_t)(uio_uio_resid(uiop))) != tresid) {
 2903                 dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
 2904                 dp->d_type = DT_UNKNOWN;
 2905                 dp->d_fileno = 0;
 2906                 dp->d_namlen = 0;
 2907                 dp->d_name[0] = '\0';
 2908                 tl = (u_int32_t *)&dp->d_name[4];
 2909                 *tl++ = cookie.lval[0];
 2910                 *tl = cookie.lval[1];
 2911                 dp->d_reclen = DIRBLKSIZ;
 2912                 uio_iov_base_add(uiop, DIRBLKSIZ);
 2913                 uio_iov_len_add(uiop, -(DIRBLKSIZ));
 2914                 uio_uio_resid_add(uiop, -(DIRBLKSIZ));
 2915                 uiop->uio_offset += DIRBLKSIZ;
 2916         }
 2917 
 2918 nfsmout:
 2919         if (nd->nd_mrep != NULL)
 2920                 mbuf_freem(nd->nd_mrep);
 2921         return (error);
 2922 }
 2923 
 2924 #ifndef APPLE
 2925 /*
 2926  * NFS V3 readdir plus RPC. Used in place of nfsrpc_readdir().
 2927  * (Also used for NFS V4 when mount flag set.)
 2928  * (ditto above w.r.t. multiple of DIRBLKSIZ, etc.)
 2929  */
 2930 APPLESTATIC int
 2931 nfsrpc_readdirplus(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
 2932     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 2933     int *eofp, void *stuff)
 2934 {
 2935         int len, left;
 2936         struct dirent *dp = NULL;
 2937         u_int32_t *tl;
 2938         vnode_t newvp = NULLVP;
 2939         struct nfsrv_descript nfsd, *nd = &nfsd;
 2940         struct nameidata nami, *ndp = &nami;
 2941         struct componentname *cnp = &ndp->ni_cnd;
 2942         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 2943         struct nfsnode *dnp = VTONFS(vp), *np;
 2944         struct nfsvattr nfsva;
 2945         struct nfsfh *nfhp;
 2946         nfsquad_t cookie, ncookie;
 2947         int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
 2948         int attrflag, tryformoredirs = 1, eof = 0, gotmnton = 0;
 2949         int isdotdot = 0, unlocknewvp = 0;
 2950         long dotfileid, dotdotfileid = 0, fileno = 0;
 2951         char *cp;
 2952         nfsattrbit_t attrbits, dattrbits;
 2953         size_t tresid;
 2954         u_int32_t *tl2 = NULL, fakefileno = 0xffffffff, rderr;
 2955         struct timespec dctime;
 2956 
 2957         KASSERT(uiop->uio_iovcnt == 1 &&
 2958             (uio_uio_resid(uiop) & (DIRBLKSIZ - 1)) == 0,
 2959             ("nfs readdirplusrpc bad uio"));
 2960         timespecclear(&dctime);
 2961         *attrflagp = 0;
 2962         if (eofp != NULL)
 2963                 *eofp = 0;
 2964         ndp->ni_dvp = vp;
 2965         nd->nd_mrep = NULL;
 2966         cookie.lval[0] = cookiep->nfsuquad[0];
 2967         cookie.lval[1] = cookiep->nfsuquad[1];
 2968         tresid = uio_uio_resid(uiop);
 2969 
 2970         /*
 2971          * For NFSv4, first create the "." and ".." entries.
 2972          */
 2973         if (NFSHASNFSV4(nmp)) {
 2974                 NFSGETATTR_ATTRBIT(&dattrbits);
 2975                 NFSZERO_ATTRBIT(&attrbits);
 2976                 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FILEID);
 2977                 if (NFSISSET_ATTRBIT(&dnp->n_vattr.na_suppattr,
 2978                     NFSATTRBIT_MOUNTEDONFILEID)) {
 2979                         NFSSETBIT_ATTRBIT(&attrbits,
 2980                             NFSATTRBIT_MOUNTEDONFILEID);
 2981                         gotmnton = 1;
 2982                 } else {
 2983                         /*
 2984                          * Must fake it. Use the fileno, except when the
 2985                          * fsid is != to that of the directory. For that
 2986                          * case, generate a fake fileno that is not the same.
 2987                          */
 2988                         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_FSID);
 2989                         gotmnton = 0;
 2990                 }
 2991 
 2992                 /*
 2993                  * Joy, oh joy. For V4 we get to hand craft '.' and '..'.
 2994                  */
 2995                 if (uiop->uio_offset == 0) {
 2996 #if defined(__FreeBSD_version) && __FreeBSD_version >= 800000
 2997                         error = VOP_GETATTR(vp, &nfsva.na_vattr, cred);
 2998 #else
 2999                         error = VOP_GETATTR(vp, &nfsva.na_vattr, cred, p);
 3000 #endif
 3001                         if (error)
 3002                             return (error);
 3003                         dctime = nfsva.na_ctime;
 3004                         dotfileid = nfsva.na_fileid;
 3005                         NFSCL_REQSTART(nd, NFSPROC_LOOKUPP, vp);
 3006                         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 3007                         *tl++ = txdr_unsigned(NFSV4OP_GETFH);
 3008                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3009                         (void) nfsrv_putattrbit(nd, &attrbits);
 3010                         error = nfscl_request(nd, vp, p, cred, stuff);
 3011                         if (error)
 3012                             return (error);
 3013                         if (nd->nd_repstat == 0) {
 3014                             NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3015                             len = fxdr_unsigned(int, *(tl + 2));
 3016                             if (len > 0 && len <= NFSX_V4FHMAX)
 3017                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 3018                             else
 3019                                 error = EPERM;
 3020                             if (!error) {
 3021                                 NFSM_DISSECT(tl, u_int32_t *, 2*NFSX_UNSIGNED);
 3022                                 nfsva.na_mntonfileno = 0xffffffff;
 3023                                 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
 3024                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 3025                                     NULL, NULL, NULL, p, cred);
 3026                                 if (error) {
 3027                                     dotdotfileid = dotfileid;
 3028                                 } else if (gotmnton) {
 3029                                     if (nfsva.na_mntonfileno != 0xffffffff)
 3030                                         dotdotfileid = nfsva.na_mntonfileno;
 3031                                     else
 3032                                         dotdotfileid = nfsva.na_fileid;
 3033                                 } else if (nfsva.na_filesid[0] ==
 3034                                     dnp->n_vattr.na_filesid[0] &&
 3035                                     nfsva.na_filesid[1] ==
 3036                                     dnp->n_vattr.na_filesid[1]) {
 3037                                     dotdotfileid = nfsva.na_fileid;
 3038                                 } else {
 3039                                     do {
 3040                                         fakefileno--;
 3041                                     } while (fakefileno ==
 3042                                         nfsva.na_fileid);
 3043                                     dotdotfileid = fakefileno;
 3044                                 }
 3045                             }
 3046                         } else if (nd->nd_repstat == NFSERR_NOENT) {
 3047                             /*
 3048                              * Lookupp returns NFSERR_NOENT when we are
 3049                              * at the root, so just use the current dir.
 3050                              */
 3051                             nd->nd_repstat = 0;
 3052                             dotdotfileid = dotfileid;
 3053                         } else {
 3054                             error = nd->nd_repstat;
 3055                         }
 3056                         mbuf_freem(nd->nd_mrep);
 3057                         if (error)
 3058                             return (error);
 3059                         nd->nd_mrep = NULL;
 3060                         dp = (struct dirent *)uio_iov_base(uiop);
 3061                         dp->d_type = DT_DIR;
 3062                         dp->d_fileno = dotfileid;
 3063                         dp->d_namlen = 1;
 3064                         dp->d_name[0] = '.';
 3065                         dp->d_name[1] = '\0';
 3066                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 3067                         /*
 3068                          * Just make these offset cookie 0.
 3069                          */
 3070                         tl = (u_int32_t *)&dp->d_name[4];
 3071                         *tl++ = 0;
 3072                         *tl = 0;
 3073                         blksiz += dp->d_reclen;
 3074                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 3075                         uiop->uio_offset += dp->d_reclen;
 3076                         uio_iov_base_add(uiop, dp->d_reclen);
 3077                         uio_iov_len_add(uiop, -(dp->d_reclen));
 3078                         dp = (struct dirent *)uio_iov_base(uiop);
 3079                         dp->d_type = DT_DIR;
 3080                         dp->d_fileno = dotdotfileid;
 3081                         dp->d_namlen = 2;
 3082                         dp->d_name[0] = '.';
 3083                         dp->d_name[1] = '.';
 3084                         dp->d_name[2] = '\0';
 3085                         dp->d_reclen = DIRENT_SIZE(dp) + NFSX_HYPER;
 3086                         /*
 3087                          * Just make these offset cookie 0.
 3088                          */
 3089                         tl = (u_int32_t *)&dp->d_name[4];
 3090                         *tl++ = 0;
 3091                         *tl = 0;
 3092                         blksiz += dp->d_reclen;
 3093                         uio_uio_resid_add(uiop, -(dp->d_reclen));
 3094                         uiop->uio_offset += dp->d_reclen;
 3095                         uio_iov_base_add(uiop, dp->d_reclen);
 3096                         uio_iov_len_add(uiop, -(dp->d_reclen));
 3097                 }
 3098                 NFSREADDIRPLUS_ATTRBIT(&attrbits);
 3099                 if (gotmnton)
 3100                         NFSSETBIT_ATTRBIT(&attrbits,
 3101                             NFSATTRBIT_MOUNTEDONFILEID);
 3102         }
 3103 
 3104         /*
 3105          * Loop around doing readdir rpc's of size nm_readdirsize.
 3106          * The stopping criteria is EOF or buffer full.
 3107          */
 3108         while (more_dirs && bigenough) {
 3109                 *attrflagp = 0;
 3110                 NFSCL_REQSTART(nd, NFSPROC_READDIRPLUS, vp);
 3111                 NFSM_BUILD(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
 3112                 *tl++ = cookie.lval[0];
 3113                 *tl++ = cookie.lval[1];
 3114                 if (cookie.qval == 0) {
 3115                         *tl++ = 0;
 3116                         *tl++ = 0;
 3117                 } else {
 3118                         NFSLOCKNODE(dnp);
 3119                         *tl++ = dnp->n_cookieverf.nfsuquad[0];
 3120                         *tl++ = dnp->n_cookieverf.nfsuquad[1];
 3121                         NFSUNLOCKNODE(dnp);
 3122                 }
 3123                 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
 3124                 *tl = txdr_unsigned(nmp->nm_readdirsize);
 3125                 if (nd->nd_flag & ND_NFSV4) {
 3126                         (void) nfsrv_putattrbit(nd, &attrbits);
 3127                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 3128                         *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3129                         (void) nfsrv_putattrbit(nd, &dattrbits);
 3130                 }
 3131                 error = nfscl_request(nd, vp, p, cred, stuff);
 3132                 if (error)
 3133                         return (error);
 3134                 if (nd->nd_flag & ND_NFSV3)
 3135                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3136                 if (nd->nd_repstat || error) {
 3137                         if (!error)
 3138                                 error = nd->nd_repstat;
 3139                         goto nfsmout;
 3140                 }
 3141                 if ((nd->nd_flag & ND_NFSV3) != 0 && *attrflagp != 0)
 3142                         dctime = nap->na_ctime;
 3143                 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3144                 NFSLOCKNODE(dnp);
 3145                 dnp->n_cookieverf.nfsuquad[0] = *tl++;
 3146                 dnp->n_cookieverf.nfsuquad[1] = *tl++;
 3147                 NFSUNLOCKNODE(dnp);
 3148                 more_dirs = fxdr_unsigned(int, *tl);
 3149                 if (!more_dirs)
 3150                         tryformoredirs = 0;
 3151         
 3152                 /* loop thru the dir entries, doctoring them to 4bsd form */
 3153                 while (more_dirs && bigenough) {
 3154                         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3155                         if (nd->nd_flag & ND_NFSV4) {
 3156                                 ncookie.lval[0] = *tl++;
 3157                                 ncookie.lval[1] = *tl++;
 3158                         } else {
 3159                                 fileno = fxdr_unsigned(long, *++tl);
 3160                                 tl++;
 3161                         }
 3162                         len = fxdr_unsigned(int, *tl);
 3163                         if (len <= 0 || len > NFS_MAXNAMLEN) {
 3164                                 error = EBADRPC;
 3165                                 goto nfsmout;
 3166                         }
 3167                         tlen = NFSM_RNDUP(len);
 3168                         if (tlen == len)
 3169                                 tlen += 4;  /* To ensure null termination */
 3170                         left = DIRBLKSIZ - blksiz;
 3171                         if ((tlen + DIRHDSIZ + NFSX_HYPER) > left) {
 3172                                 dp->d_reclen += left;
 3173                                 uio_iov_base_add(uiop, left);
 3174                                 uio_iov_len_add(uiop, -(left));
 3175                                 uio_uio_resid_add(uiop, -(left));
 3176                                 uiop->uio_offset += left;
 3177                                 blksiz = 0;
 3178                         }
 3179                         if ((tlen + DIRHDSIZ + NFSX_HYPER) > uio_uio_resid(uiop))
 3180                                 bigenough = 0;
 3181                         if (bigenough) {
 3182                                 dp = (struct dirent *)uio_iov_base(uiop);
 3183                                 dp->d_namlen = len;
 3184                                 dp->d_reclen = tlen + DIRHDSIZ + NFSX_HYPER;
 3185                                 dp->d_type = DT_UNKNOWN;
 3186                                 blksiz += dp->d_reclen;
 3187                                 if (blksiz == DIRBLKSIZ)
 3188                                         blksiz = 0;
 3189                                 uio_uio_resid_add(uiop, -(DIRHDSIZ));
 3190                                 uiop->uio_offset += DIRHDSIZ;
 3191                                 uio_iov_base_add(uiop, DIRHDSIZ);
 3192                                 uio_iov_len_add(uiop, -(DIRHDSIZ));
 3193                                 cnp->cn_nameptr = uio_iov_base(uiop);
 3194                                 cnp->cn_namelen = len;
 3195                                 NFSCNHASHZERO(cnp);
 3196                                 error = nfsm_mbufuio(nd, uiop, len);
 3197                                 if (error)
 3198                                         goto nfsmout;
 3199                                 cp = uio_iov_base(uiop);
 3200                                 tlen -= len;
 3201                                 *cp = '\0';
 3202                                 cp += tlen;     /* points to cookie storage */
 3203                                 tl2 = (u_int32_t *)cp;
 3204                                 if (len == 2 && cnp->cn_nameptr[0] == '.' &&
 3205                                     cnp->cn_nameptr[1] == '.')
 3206                                         isdotdot = 1;
 3207                                 else
 3208                                         isdotdot = 0;
 3209                                 uio_iov_base_add(uiop, (tlen + NFSX_HYPER));
 3210                                 uio_iov_len_add(uiop, -(tlen + NFSX_HYPER));
 3211                                 uio_uio_resid_add(uiop, -(tlen + NFSX_HYPER));
 3212                                 uiop->uio_offset += (tlen + NFSX_HYPER);
 3213                         } else {
 3214                                 error = nfsm_advance(nd, NFSM_RNDUP(len), -1);
 3215                                 if (error)
 3216                                         goto nfsmout;
 3217                         }
 3218                         nfhp = NULL;
 3219                         if (nd->nd_flag & ND_NFSV3) {
 3220                                 NFSM_DISSECT(tl, u_int32_t *, 3*NFSX_UNSIGNED);
 3221                                 ncookie.lval[0] = *tl++;
 3222                                 ncookie.lval[1] = *tl++;
 3223                                 attrflag = fxdr_unsigned(int, *tl);
 3224                                 if (attrflag) {
 3225                                   error = nfsm_loadattr(nd, &nfsva);
 3226                                   if (error)
 3227                                         goto nfsmout;
 3228                                 }
 3229                                 NFSM_DISSECT(tl,u_int32_t *,NFSX_UNSIGNED);
 3230                                 if (*tl) {
 3231                                         error = nfsm_getfh(nd, &nfhp);
 3232                                         if (error)
 3233                                             goto nfsmout;
 3234                                 }
 3235                                 if (!attrflag && nfhp != NULL) {
 3236                                         FREE((caddr_t)nfhp, M_NFSFH);
 3237                                         nfhp = NULL;
 3238                                 }
 3239                         } else {
 3240                                 rderr = 0;
 3241                                 nfsva.na_mntonfileno = 0xffffffff;
 3242                                 error = nfsv4_loadattr(nd, NULL, &nfsva, &nfhp,
 3243                                     NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
 3244                                     NULL, NULL, &rderr, p, cred);
 3245                                 if (error)
 3246                                         goto nfsmout;
 3247                         }
 3248 
 3249                         if (bigenough) {
 3250                             if (nd->nd_flag & ND_NFSV4) {
 3251                                 if (rderr) {
 3252                                     dp->d_fileno = 0;
 3253                                 } else if (gotmnton) {
 3254                                     if (nfsva.na_mntonfileno != 0xffffffff)
 3255                                         dp->d_fileno = nfsva.na_mntonfileno;
 3256                                     else
 3257                                         dp->d_fileno = nfsva.na_fileid;
 3258                                 } else if (nfsva.na_filesid[0] ==
 3259                                     dnp->n_vattr.na_filesid[0] &&
 3260                                     nfsva.na_filesid[1] ==
 3261                                     dnp->n_vattr.na_filesid[1]) {
 3262                                     dp->d_fileno = nfsva.na_fileid;
 3263                                 } else {
 3264                                     do {
 3265                                         fakefileno--;
 3266                                     } while (fakefileno ==
 3267                                         nfsva.na_fileid);
 3268                                     dp->d_fileno = fakefileno;
 3269                                 }
 3270                             } else {
 3271                                 dp->d_fileno = fileno;
 3272                             }
 3273                             *tl2++ = cookiep->nfsuquad[0] = cookie.lval[0] =
 3274                                 ncookie.lval[0];
 3275                             *tl2 = cookiep->nfsuquad[1] = cookie.lval[1] =
 3276                                 ncookie.lval[1];
 3277 
 3278                             if (nfhp != NULL) {
 3279                                 if (NFSRV_CMPFH(nfhp->nfh_fh, nfhp->nfh_len,
 3280                                     dnp->n_fhp->nfh_fh, dnp->n_fhp->nfh_len)) {
 3281                                     VREF(vp);
 3282                                     newvp = vp;
 3283                                     unlocknewvp = 0;
 3284                                     FREE((caddr_t)nfhp, M_NFSFH);
 3285                                     np = dnp;
 3286                                 } else if (isdotdot != 0) {
 3287                                     /*
 3288                                      * Skip doing a nfscl_nget() call for "..".
 3289                                      * There's a race between acquiring the nfs
 3290                                      * node here and lookups that look for the
 3291                                      * directory being read (in the parent).
 3292                                      * It would try to get a lock on ".." here,
 3293                                      * owning the lock on the directory being
 3294                                      * read. Lookup will hold the lock on ".."
 3295                                      * and try to acquire the lock on the
 3296                                      * directory being read.
 3297                                      * If the directory is unlocked/relocked,
 3298                                      * then there is a LOR with the buflock
 3299                                      * vp is relocked.
 3300                                      */
 3301                                     free(nfhp, M_NFSFH);
 3302                                 } else {
 3303                                     error = nfscl_nget(vnode_mount(vp), vp,
 3304                                       nfhp, cnp, p, &np, NULL, LK_EXCLUSIVE);
 3305                                     if (!error) {
 3306                                         newvp = NFSTOV(np);
 3307                                         unlocknewvp = 1;
 3308                                     }
 3309                                 }
 3310                                 nfhp = NULL;
 3311                                 if (newvp != NULLVP) {
 3312                                     error = nfscl_loadattrcache(&newvp,
 3313                                         &nfsva, NULL, NULL, 0, 0);
 3314                                     if (error) {
 3315                                         if (unlocknewvp)
 3316                                             vput(newvp);
 3317                                         else
 3318                                             vrele(newvp);
 3319                                         goto nfsmout;
 3320                                     }
 3321                                     dp->d_type =
 3322                                         vtonfs_dtype(np->n_vattr.na_type);
 3323                                     ndp->ni_vp = newvp;
 3324                                     NFSCNHASH(cnp, HASHINIT);
 3325                                     if (cnp->cn_namelen <= NCHNAMLEN &&
 3326                                         (newvp->v_type != VDIR ||
 3327                                          dctime.tv_sec != 0)) {
 3328                                         cache_enter_time(ndp->ni_dvp,
 3329                                             ndp->ni_vp, cnp,
 3330                                             &nfsva.na_ctime,
 3331                                             newvp->v_type != VDIR ? NULL :
 3332                                             &dctime);
 3333                                     }
 3334                                     if (unlocknewvp)
 3335                                         vput(newvp);
 3336                                     else
 3337                                         vrele(newvp);
 3338                                     newvp = NULLVP;
 3339                                 }
 3340                             }
 3341                         } else if (nfhp != NULL) {
 3342                             FREE((caddr_t)nfhp, M_NFSFH);
 3343                         }
 3344                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3345                         more_dirs = fxdr_unsigned(int, *tl);
 3346                 }
 3347                 /*
 3348                  * If at end of rpc data, get the eof boolean
 3349                  */
 3350                 if (!more_dirs) {
 3351                         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3352                         eof = fxdr_unsigned(int, *tl);
 3353                         if (tryformoredirs)
 3354                                 more_dirs = !eof;
 3355                         if (nd->nd_flag & ND_NFSV4) {
 3356                                 error = nfscl_postop_attr(nd, nap, attrflagp,
 3357                                     stuff);
 3358                                 if (error)
 3359                                         goto nfsmout;
 3360                         }
 3361                 }
 3362                 mbuf_freem(nd->nd_mrep);
 3363                 nd->nd_mrep = NULL;
 3364         }
 3365         /*
 3366          * Fill last record, iff any, out to a multiple of DIRBLKSIZ
 3367          * by increasing d_reclen for the last record.
 3368          */
 3369         if (blksiz > 0) {
 3370                 left = DIRBLKSIZ - blksiz;
 3371                 dp->d_reclen += left;
 3372                 uio_iov_base_add(uiop, left);
 3373                 uio_iov_len_add(uiop, -(left));
 3374                 uio_uio_resid_add(uiop, -(left));
 3375                 uiop->uio_offset += left;
 3376         }
 3377 
 3378         /*
 3379          * If returning no data, assume end of file.
 3380          * If not bigenough, return not end of file, since you aren't
 3381          *    returning all the data
 3382          * Otherwise, return the eof flag from the server.
 3383          */
 3384         if (eofp != NULL) {
 3385                 if (tresid == uio_uio_resid(uiop))
 3386                         *eofp = 1;
 3387                 else if (!bigenough)
 3388                         *eofp = 0;
 3389                 else
 3390                         *eofp = eof;
 3391         }
 3392 
 3393         /*
 3394          * Add extra empty records to any remaining DIRBLKSIZ chunks.
 3395          */
 3396         while (uio_uio_resid(uiop) > 0 && uio_uio_resid(uiop) != tresid) {
 3397                 dp = (struct dirent *)uio_iov_base(uiop);
 3398                 dp->d_type = DT_UNKNOWN;
 3399                 dp->d_fileno = 0;
 3400                 dp->d_namlen = 0;
 3401                 dp->d_name[0] = '\0';
 3402                 tl = (u_int32_t *)&dp->d_name[4];
 3403                 *tl++ = cookie.lval[0];
 3404                 *tl = cookie.lval[1];
 3405                 dp->d_reclen = DIRBLKSIZ;
 3406                 uio_iov_base_add(uiop, DIRBLKSIZ);
 3407                 uio_iov_len_add(uiop, -(DIRBLKSIZ));
 3408                 uio_uio_resid_add(uiop, -(DIRBLKSIZ));
 3409                 uiop->uio_offset += DIRBLKSIZ;
 3410         }
 3411 
 3412 nfsmout:
 3413         if (nd->nd_mrep != NULL)
 3414                 mbuf_freem(nd->nd_mrep);
 3415         return (error);
 3416 }
 3417 #endif  /* !APPLE */
 3418 
 3419 /*
 3420  * Nfs commit rpc
 3421  */
 3422 APPLESTATIC int
 3423 nfsrpc_commit(vnode_t vp, u_quad_t offset, int cnt, struct ucred *cred,
 3424     NFSPROC_T *p, u_char *verfp, struct nfsvattr *nap, int *attrflagp,
 3425     void *stuff)
 3426 {
 3427         u_int32_t *tl;
 3428         struct nfsrv_descript nfsd, *nd = &nfsd;
 3429         nfsattrbit_t attrbits;
 3430         int error;
 3431         
 3432         *attrflagp = 0;
 3433         NFSCL_REQSTART(nd, NFSPROC_COMMIT, vp);
 3434         NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3435         txdr_hyper(offset, tl);
 3436         tl += 2;
 3437         *tl = txdr_unsigned(cnt);
 3438         if (nd->nd_flag & ND_NFSV4) {
 3439                 /*
 3440                  * And do a Getattr op.
 3441                  */
 3442                 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 3443                 *tl = txdr_unsigned(NFSV4OP_GETATTR);
 3444                 NFSGETATTR_ATTRBIT(&attrbits);
 3445                 (void) nfsrv_putattrbit(nd, &attrbits);
 3446         }
 3447         error = nfscl_request(nd, vp, p, cred, stuff);
 3448         if (error)
 3449                 return (error);
 3450         error = nfscl_wcc_data(nd, vp, nap, attrflagp, NULL, stuff);
 3451         if (!error && !nd->nd_repstat) {
 3452                 NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF);
 3453                 NFSBCOPY((caddr_t)tl, verfp, NFSX_VERF);
 3454                 if (nd->nd_flag & ND_NFSV4)
 3455                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3456         }
 3457 nfsmout:
 3458         if (!error && nd->nd_repstat)
 3459                 error = nd->nd_repstat;
 3460         mbuf_freem(nd->nd_mrep);
 3461         return (error);
 3462 }
 3463 
 3464 /*
 3465  * NFS byte range lock rpc.
 3466  * (Mostly just calls one of the three lower level RPC routines.)
 3467  */
 3468 APPLESTATIC int
 3469 nfsrpc_advlock(vnode_t vp, off_t size, int op, struct flock *fl,
 3470     int reclaim, struct ucred *cred, NFSPROC_T *p, void *id, int flags)
 3471 {
 3472         struct nfscllockowner *lp;
 3473         struct nfsclclient *clp;
 3474         struct nfsfh *nfhp;
 3475         struct nfsrv_descript nfsd, *nd = &nfsd;
 3476         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 3477         u_int64_t off, len;
 3478         off_t start, end;
 3479         u_int32_t clidrev = 0;
 3480         int error = 0, newone = 0, expireret = 0, retrycnt, donelocally;
 3481         int callcnt, dorpc;
 3482 
 3483         /*
 3484          * Convert the flock structure into a start and end and do POSIX
 3485          * bounds checking.
 3486          */
 3487         switch (fl->l_whence) {
 3488         case SEEK_SET:
 3489         case SEEK_CUR:
 3490                 /*
 3491                  * Caller is responsible for adding any necessary offset
 3492                  * when SEEK_CUR is used.
 3493                  */
 3494                 start = fl->l_start;
 3495                 off = fl->l_start;
 3496                 break;
 3497         case SEEK_END:
 3498                 start = size + fl->l_start;
 3499                 off = size + fl->l_start;
 3500                 break;
 3501         default:
 3502                 return (EINVAL);
 3503         };
 3504         if (start < 0)
 3505                 return (EINVAL);
 3506         if (fl->l_len != 0) {
 3507                 end = start + fl->l_len - 1;
 3508                 if (end < start)
 3509                         return (EINVAL);
 3510         }
 3511 
 3512         len = fl->l_len;
 3513         if (len == 0)
 3514                 len = NFS64BITSSET;
 3515         retrycnt = 0;
 3516         do {
 3517             nd->nd_repstat = 0;
 3518             if (op == F_GETLK) {
 3519                 error = nfscl_getcl(vp, cred, p, &clp);
 3520                 if (error)
 3521                         return (error);
 3522                 error = nfscl_lockt(vp, clp, off, len, fl, p, id, flags);
 3523                 if (!error) {
 3524                         clidrev = clp->nfsc_clientidrev;
 3525                         error = nfsrpc_lockt(nd, vp, clp, off, len, fl, cred,
 3526                             p, id, flags);
 3527                 } else if (error == -1) {
 3528                         error = 0;
 3529                 }
 3530                 nfscl_clientrelease(clp);
 3531             } else if (op == F_UNLCK && fl->l_type == F_UNLCK) {
 3532                 /*
 3533                  * We must loop around for all lockowner cases.
 3534                  */
 3535                 callcnt = 0;
 3536                 error = nfscl_getcl(vp, cred, p, &clp);
 3537                 if (error)
 3538                         return (error);
 3539                 do {
 3540                     error = nfscl_relbytelock(vp, off, len, cred, p, callcnt,
 3541                         clp, id, flags, &lp, &dorpc);
 3542                     /*
 3543                      * If it returns a NULL lp, we're done.
 3544                      */
 3545                     if (lp == NULL) {
 3546                         if (callcnt == 0)
 3547                             nfscl_clientrelease(clp);
 3548                         else
 3549                             nfscl_releasealllocks(clp, vp, p, id, flags);
 3550                         return (error);
 3551                     }
 3552                     if (nmp->nm_clp != NULL)
 3553                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 3554                     else
 3555                         clidrev = 0;
 3556                     /*
 3557                      * If the server doesn't support Posix lock semantics,
 3558                      * only allow locks on the entire file, since it won't
 3559                      * handle overlapping byte ranges.
 3560                      * There might still be a problem when a lock
 3561                      * upgrade/downgrade (read<->write) occurs, since the
 3562                      * server "might" expect an unlock first?
 3563                      */
 3564                     if (dorpc && (lp->nfsl_open->nfso_posixlock ||
 3565                         (off == 0 && len == NFS64BITSSET))) {
 3566                         /*
 3567                          * Since the lock records will go away, we must
 3568                          * wait for grace and delay here.
 3569                          */
 3570                         do {
 3571                             error = nfsrpc_locku(nd, nmp, lp, off, len,
 3572                                 NFSV4LOCKT_READ, cred, p, 0);
 3573                             if ((nd->nd_repstat == NFSERR_GRACE ||
 3574                                  nd->nd_repstat == NFSERR_DELAY) &&
 3575                                 error == 0)
 3576                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
 3577                                     "nfs_advlock");
 3578                         } while ((nd->nd_repstat == NFSERR_GRACE ||
 3579                             nd->nd_repstat == NFSERR_DELAY) && error == 0);
 3580                     }
 3581                     callcnt++;
 3582                 } while (error == 0 && nd->nd_repstat == 0);
 3583                 nfscl_releasealllocks(clp, vp, p, id, flags);
 3584             } else if (op == F_SETLK) {
 3585                 error = nfscl_getbytelock(vp, off, len, fl->l_type, cred, p,
 3586                     NULL, 0, id, flags, NULL, NULL, &lp, &newone, &donelocally);
 3587                 if (error || donelocally) {
 3588                         return (error);
 3589                 }
 3590                 if (nmp->nm_clp != NULL)
 3591                         clidrev = nmp->nm_clp->nfsc_clientidrev;
 3592                 else
 3593                         clidrev = 0;
 3594                 nfhp = VTONFS(vp)->n_fhp;
 3595                 if (!lp->nfsl_open->nfso_posixlock &&
 3596                     (off != 0 || len != NFS64BITSSET)) {
 3597                         error = EINVAL;
 3598                 } else {
 3599                         error = nfsrpc_lock(nd, nmp, vp, nfhp->nfh_fh,
 3600                             nfhp->nfh_len, lp, newone, reclaim, off,
 3601                             len, fl->l_type, cred, p, 0);
 3602                 }
 3603                 if (!error)
 3604                         error = nd->nd_repstat;
 3605                 nfscl_lockrelease(lp, error, newone);
 3606             } else {
 3607                 error = EINVAL;
 3608             }
 3609             if (!error)
 3610                 error = nd->nd_repstat;
 3611             if (error == NFSERR_GRACE || error == NFSERR_STALESTATEID ||
 3612                 error == NFSERR_STALEDONTRECOVER ||
 3613                 error == NFSERR_STALECLIENTID || error == NFSERR_DELAY) {
 3614                 (void) nfs_catnap(PZERO, error, "nfs_advlock");
 3615             } else if ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID)
 3616                 && clidrev != 0) {
 3617                 expireret = nfscl_hasexpired(nmp->nm_clp, clidrev, p);
 3618                 retrycnt++;
 3619             }
 3620         } while (error == NFSERR_GRACE ||
 3621             error == NFSERR_STALECLIENTID || error == NFSERR_DELAY ||
 3622             error == NFSERR_STALEDONTRECOVER || error == NFSERR_STALESTATEID ||
 3623             ((error == NFSERR_EXPIRED || error == NFSERR_BADSTATEID) &&
 3624              expireret == 0 && clidrev != 0 && retrycnt < 4));
 3625         if (error && retrycnt >= 4)
 3626                 error = EIO;
 3627         return (error);
 3628 }
 3629 
 3630 /*
 3631  * The lower level routine for the LockT case.
 3632  */
 3633 APPLESTATIC int
 3634 nfsrpc_lockt(struct nfsrv_descript *nd, vnode_t vp,
 3635     struct nfsclclient *clp, u_int64_t off, u_int64_t len, struct flock *fl,
 3636     struct ucred *cred, NFSPROC_T *p, void *id, int flags)
 3637 {
 3638         u_int32_t *tl;
 3639         int error, type, size;
 3640         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 3641         struct nfsnode *np;
 3642 
 3643         NFSCL_REQSTART(nd, NFSPROC_LOCKT, vp);
 3644         NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
 3645         if (fl->l_type == F_RDLCK)
 3646                 *tl++ = txdr_unsigned(NFSV4LOCKT_READ);
 3647         else
 3648                 *tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
 3649         txdr_hyper(off, tl);
 3650         tl += 2;
 3651         txdr_hyper(len, tl);
 3652         tl += 2;
 3653         *tl++ = clp->nfsc_clientid.lval[0];
 3654         *tl = clp->nfsc_clientid.lval[1];
 3655         nfscl_filllockowner(id, own, flags);
 3656         np = VTONFS(vp);
 3657         NFSBCOPY(np->n_fhp->nfh_fh, &own[NFSV4CL_LOCKNAMELEN],
 3658             np->n_fhp->nfh_len);
 3659         (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + np->n_fhp->nfh_len);
 3660         error = nfscl_request(nd, vp, p, cred, NULL);
 3661         if (error)
 3662                 return (error);
 3663         if (nd->nd_repstat == 0) {
 3664                 fl->l_type = F_UNLCK;
 3665         } else if (nd->nd_repstat == NFSERR_DENIED) {
 3666                 nd->nd_repstat = 0;
 3667                 fl->l_whence = SEEK_SET;
 3668                 NFSM_DISSECT(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
 3669                 fl->l_start = fxdr_hyper(tl);
 3670                 tl += 2;
 3671                 len = fxdr_hyper(tl);
 3672                 tl += 2;
 3673                 if (len == NFS64BITSSET)
 3674                         fl->l_len = 0;
 3675                 else
 3676                         fl->l_len = len;
 3677                 type = fxdr_unsigned(int, *tl++);
 3678                 if (type == NFSV4LOCKT_WRITE)
 3679                         fl->l_type = F_WRLCK;
 3680                 else
 3681                         fl->l_type = F_RDLCK;
 3682                 /*
 3683                  * XXX For now, I have no idea what to do with the
 3684                  * conflicting lock_owner, so I'll just set the pid == 0
 3685                  * and skip over the lock_owner.
 3686                  */
 3687                 fl->l_pid = (pid_t)0;
 3688                 tl += 2;
 3689                 size = fxdr_unsigned(int, *tl);
 3690                 if (size < 0 || size > NFSV4_OPAQUELIMIT)
 3691                         error = EBADRPC;
 3692                 if (!error)
 3693                         error = nfsm_advance(nd, NFSM_RNDUP(size), -1);
 3694         } else if (nd->nd_repstat == NFSERR_STALECLIENTID)
 3695                 nfscl_initiate_recovery(clp);
 3696 nfsmout:
 3697         mbuf_freem(nd->nd_mrep);
 3698         return (error);
 3699 }
 3700 
 3701 /*
 3702  * Lower level function that performs the LockU RPC.
 3703  */
 3704 static int
 3705 nfsrpc_locku(struct nfsrv_descript *nd, struct nfsmount *nmp,
 3706     struct nfscllockowner *lp, u_int64_t off, u_int64_t len,
 3707     u_int32_t type, struct ucred *cred, NFSPROC_T *p, int syscred)
 3708 {
 3709         u_int32_t *tl;
 3710         int error;
 3711 
 3712         nfscl_reqstart(nd, NFSPROC_LOCKU, nmp, lp->nfsl_open->nfso_fh,
 3713             lp->nfsl_open->nfso_fhlen, NULL);
 3714         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + 6 * NFSX_UNSIGNED);
 3715         *tl++ = txdr_unsigned(type);
 3716         *tl = txdr_unsigned(lp->nfsl_seqid);
 3717         if (nfstest_outofseq &&
 3718             (arc4random() % nfstest_outofseq) == 0)
 3719                 *tl = txdr_unsigned(lp->nfsl_seqid + 1);
 3720         tl++;
 3721         *tl++ = lp->nfsl_stateid.seqid;
 3722         *tl++ = lp->nfsl_stateid.other[0];
 3723         *tl++ = lp->nfsl_stateid.other[1];
 3724         *tl++ = lp->nfsl_stateid.other[2];
 3725         txdr_hyper(off, tl);
 3726         tl += 2;
 3727         txdr_hyper(len, tl);
 3728         if (syscred)
 3729                 nd->nd_flag |= ND_USEGSSNAME;
 3730         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 3731             NFS_PROG, NFS_VER4, NULL, 1, NULL);
 3732         NFSCL_INCRSEQID(lp->nfsl_seqid, nd);
 3733         if (error)
 3734                 return (error);
 3735         if (nd->nd_repstat == 0) {
 3736                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
 3737                 lp->nfsl_stateid.seqid = *tl++;
 3738                 lp->nfsl_stateid.other[0] = *tl++;
 3739                 lp->nfsl_stateid.other[1] = *tl++;
 3740                 lp->nfsl_stateid.other[2] = *tl;
 3741         } else if (nd->nd_repstat == NFSERR_STALESTATEID)
 3742                 nfscl_initiate_recovery(lp->nfsl_open->nfso_own->nfsow_clp);
 3743 nfsmout:
 3744         mbuf_freem(nd->nd_mrep);
 3745         return (error);
 3746 }
 3747 
 3748 /*
 3749  * The actual Lock RPC.
 3750  */
 3751 APPLESTATIC int
 3752 nfsrpc_lock(struct nfsrv_descript *nd, struct nfsmount *nmp, vnode_t vp,
 3753     u_int8_t *nfhp, int fhlen, struct nfscllockowner *lp, int newone,
 3754     int reclaim, u_int64_t off, u_int64_t len, short type, struct ucred *cred,
 3755     NFSPROC_T *p, int syscred)
 3756 {
 3757         u_int32_t *tl;
 3758         int error, size;
 3759         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 3760 
 3761         nfscl_reqstart(nd, NFSPROC_LOCK, nmp, nfhp, fhlen, NULL);
 3762         NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
 3763         if (type == F_RDLCK)
 3764                 *tl++ = txdr_unsigned(NFSV4LOCKT_READ);
 3765         else
 3766                 *tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
 3767         *tl++ = txdr_unsigned(reclaim);
 3768         txdr_hyper(off, tl);
 3769         tl += 2;
 3770         txdr_hyper(len, tl);
 3771         tl += 2;
 3772         if (newone) {
 3773             *tl = newnfs_true;
 3774             NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID +
 3775                 2 * NFSX_UNSIGNED + NFSX_HYPER);
 3776             *tl++ = txdr_unsigned(lp->nfsl_open->nfso_own->nfsow_seqid);
 3777             *tl++ = lp->nfsl_open->nfso_stateid.seqid;
 3778             *tl++ = lp->nfsl_open->nfso_stateid.other[0];
 3779             *tl++ = lp->nfsl_open->nfso_stateid.other[1];
 3780             *tl++ = lp->nfsl_open->nfso_stateid.other[2];
 3781             *tl++ = txdr_unsigned(lp->nfsl_seqid);
 3782             *tl++ = lp->nfsl_open->nfso_own->nfsow_clp->nfsc_clientid.lval[0];
 3783             *tl = lp->nfsl_open->nfso_own->nfsow_clp->nfsc_clientid.lval[1];
 3784             NFSBCOPY(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN);
 3785             NFSBCOPY(nfhp, &own[NFSV4CL_LOCKNAMELEN], fhlen);
 3786             (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + fhlen);
 3787         } else {
 3788             *tl = newnfs_false;
 3789             NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + NFSX_UNSIGNED);
 3790             *tl++ = lp->nfsl_stateid.seqid;
 3791             *tl++ = lp->nfsl_stateid.other[0];
 3792             *tl++ = lp->nfsl_stateid.other[1];
 3793             *tl++ = lp->nfsl_stateid.other[2];
 3794             *tl = txdr_unsigned(lp->nfsl_seqid);
 3795             if (nfstest_outofseq &&
 3796                 (arc4random() % nfstest_outofseq) == 0)
 3797                     *tl = txdr_unsigned(lp->nfsl_seqid + 1);
 3798         }
 3799         if (syscred)
 3800                 nd->nd_flag |= ND_USEGSSNAME;
 3801         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
 3802             NFS_PROG, NFS_VER4, NULL, 1, NULL);
 3803         if (error)
 3804                 return (error);
 3805         if (newone)
 3806             NFSCL_INCRSEQID(lp->nfsl_open->nfso_own->nfsow_seqid, nd);
 3807         NFSCL_INCRSEQID(lp->nfsl_seqid, nd);
 3808         if (nd->nd_repstat == 0) {
 3809                 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
 3810                 lp->nfsl_stateid.seqid = *tl++;
 3811                 lp->nfsl_stateid.other[0] = *tl++;
 3812                 lp->nfsl_stateid.other[1] = *tl++;
 3813                 lp->nfsl_stateid.other[2] = *tl;
 3814         } else if (nd->nd_repstat == NFSERR_DENIED) {
 3815                 NFSM_DISSECT(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
 3816                 size = fxdr_unsigned(int, *(tl + 7));
 3817                 if (size < 0 || size > NFSV4_OPAQUELIMIT)
 3818                         error = EBADRPC;
 3819                 if (!error)
 3820                         error = nfsm_advance(nd, NFSM_RNDUP(size), -1);
 3821         } else if (nd->nd_repstat == NFSERR_STALESTATEID)
 3822                 nfscl_initiate_recovery(lp->nfsl_open->nfso_own->nfsow_clp);
 3823 nfsmout:
 3824         mbuf_freem(nd->nd_mrep);
 3825         return (error);
 3826 }
 3827 
 3828 /*
 3829  * nfs statfs rpc
 3830  * (always called with the vp for the mount point)
 3831  */
 3832 APPLESTATIC int
 3833 nfsrpc_statfs(vnode_t vp, struct nfsstatfs *sbp, struct nfsfsinfo *fsp,
 3834     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 3835     void *stuff)
 3836 {
 3837         u_int32_t *tl = NULL;
 3838         struct nfsrv_descript nfsd, *nd = &nfsd;
 3839         struct nfsmount *nmp;
 3840         nfsattrbit_t attrbits;
 3841         int error;
 3842 
 3843         *attrflagp = 0;
 3844         nmp = VFSTONFS(vnode_mount(vp));
 3845         if (NFSHASNFSV4(nmp)) {
 3846                 /*
 3847                  * For V4, you actually do a getattr.
 3848                  */
 3849                 NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
 3850                 NFSSTATFS_GETATTRBIT(&attrbits);
 3851                 (void) nfsrv_putattrbit(nd, &attrbits);
 3852                 nd->nd_flag |= ND_USEGSSNAME;
 3853                 error = nfscl_request(nd, vp, p, cred, stuff);
 3854                 if (error)
 3855                         return (error);
 3856                 if (nd->nd_repstat == 0) {
 3857                         error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
 3858                             NULL, NULL, sbp, fsp, NULL, 0, NULL, NULL, NULL, p,
 3859                             cred);
 3860                         if (!error) {
 3861                                 nmp->nm_fsid[0] = nap->na_filesid[0];
 3862                                 nmp->nm_fsid[1] = nap->na_filesid[1];
 3863                                 NFSSETHASSETFSID(nmp);
 3864                                 *attrflagp = 1;
 3865                         }
 3866                 } else {
 3867                         error = nd->nd_repstat;
 3868                 }
 3869                 if (error)
 3870                         goto nfsmout;
 3871         } else {
 3872                 NFSCL_REQSTART(nd, NFSPROC_FSSTAT, vp);
 3873                 error = nfscl_request(nd, vp, p, cred, stuff);
 3874                 if (error)
 3875                         return (error);
 3876                 if (nd->nd_flag & ND_NFSV3) {
 3877                         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3878                         if (error)
 3879                                 goto nfsmout;
 3880                 }
 3881                 if (nd->nd_repstat) {
 3882                         error = nd->nd_repstat;
 3883                         goto nfsmout;
 3884                 }
 3885                 NFSM_DISSECT(tl, u_int32_t *,
 3886                     NFSX_STATFS(nd->nd_flag & ND_NFSV3));
 3887         }
 3888         if (NFSHASNFSV3(nmp)) {
 3889                 sbp->sf_tbytes = fxdr_hyper(tl); tl += 2;
 3890                 sbp->sf_fbytes = fxdr_hyper(tl); tl += 2;
 3891                 sbp->sf_abytes = fxdr_hyper(tl); tl += 2;
 3892                 sbp->sf_tfiles = fxdr_hyper(tl); tl += 2;
 3893                 sbp->sf_ffiles = fxdr_hyper(tl); tl += 2;
 3894                 sbp->sf_afiles = fxdr_hyper(tl); tl += 2;
 3895                 sbp->sf_invarsec = fxdr_unsigned(u_int32_t, *tl);
 3896         } else if (NFSHASNFSV4(nmp) == 0) {
 3897                 sbp->sf_tsize = fxdr_unsigned(u_int32_t, *tl++);
 3898                 sbp->sf_bsize = fxdr_unsigned(u_int32_t, *tl++);
 3899                 sbp->sf_blocks = fxdr_unsigned(u_int32_t, *tl++);
 3900                 sbp->sf_bfree = fxdr_unsigned(u_int32_t, *tl++);
 3901                 sbp->sf_bavail = fxdr_unsigned(u_int32_t, *tl);
 3902         }
 3903 nfsmout:
 3904         mbuf_freem(nd->nd_mrep);
 3905         return (error);
 3906 }
 3907 
 3908 /*
 3909  * nfs pathconf rpc
 3910  */
 3911 APPLESTATIC int
 3912 nfsrpc_pathconf(vnode_t vp, struct nfsv3_pathconf *pc,
 3913     struct ucred *cred, NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp,
 3914     void *stuff)
 3915 {
 3916         struct nfsrv_descript nfsd, *nd = &nfsd;
 3917         struct nfsmount *nmp;
 3918         u_int32_t *tl;
 3919         nfsattrbit_t attrbits;
 3920         int error;
 3921 
 3922         *attrflagp = 0;
 3923         nmp = VFSTONFS(vnode_mount(vp));
 3924         if (NFSHASNFSV4(nmp)) {
 3925                 /*
 3926                  * For V4, you actually do a getattr.
 3927                  */
 3928                 NFSCL_REQSTART(nd, NFSPROC_GETATTR, vp);
 3929                 NFSPATHCONF_GETATTRBIT(&attrbits);
 3930                 (void) nfsrv_putattrbit(nd, &attrbits);
 3931                 nd->nd_flag |= ND_USEGSSNAME;
 3932                 error = nfscl_request(nd, vp, p, cred, stuff);
 3933                 if (error)
 3934                         return (error);
 3935                 if (nd->nd_repstat == 0) {
 3936                         error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0,
 3937                             pc, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, p,
 3938                             cred);
 3939                         if (!error)
 3940                                 *attrflagp = 1;
 3941                 } else {
 3942                         error = nd->nd_repstat;
 3943                 }
 3944         } else {
 3945                 NFSCL_REQSTART(nd, NFSPROC_PATHCONF, vp);
 3946                 error = nfscl_request(nd, vp, p, cred, stuff);
 3947                 if (error)
 3948                         return (error);
 3949                 error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3950                 if (nd->nd_repstat && !error)
 3951                         error = nd->nd_repstat;
 3952                 if (!error) {
 3953                         NFSM_DISSECT(tl, u_int32_t *, NFSX_V3PATHCONF);
 3954                         pc->pc_linkmax = fxdr_unsigned(u_int32_t, *tl++);
 3955                         pc->pc_namemax = fxdr_unsigned(u_int32_t, *tl++);
 3956                         pc->pc_notrunc = fxdr_unsigned(u_int32_t, *tl++);
 3957                         pc->pc_chownrestricted =
 3958                             fxdr_unsigned(u_int32_t, *tl++);
 3959                         pc->pc_caseinsensitive =
 3960                             fxdr_unsigned(u_int32_t, *tl++);
 3961                         pc->pc_casepreserving = fxdr_unsigned(u_int32_t, *tl);
 3962                 }
 3963         }
 3964 nfsmout:
 3965         mbuf_freem(nd->nd_mrep);
 3966         return (error);
 3967 }
 3968 
 3969 /*
 3970  * nfs version 3 fsinfo rpc call
 3971  */
 3972 APPLESTATIC int
 3973 nfsrpc_fsinfo(vnode_t vp, struct nfsfsinfo *fsp, struct ucred *cred,
 3974     NFSPROC_T *p, struct nfsvattr *nap, int *attrflagp, void *stuff)
 3975 {
 3976         u_int32_t *tl;
 3977         struct nfsrv_descript nfsd, *nd = &nfsd;
 3978         int error;
 3979 
 3980         *attrflagp = 0;
 3981         NFSCL_REQSTART(nd, NFSPROC_FSINFO, vp);
 3982         error = nfscl_request(nd, vp, p, cred, stuff);
 3983         if (error)
 3984                 return (error);
 3985         error = nfscl_postop_attr(nd, nap, attrflagp, stuff);
 3986         if (nd->nd_repstat && !error)
 3987                 error = nd->nd_repstat;
 3988         if (!error) {
 3989                 NFSM_DISSECT(tl, u_int32_t *, NFSX_V3FSINFO);
 3990                 fsp->fs_rtmax = fxdr_unsigned(u_int32_t, *tl++);
 3991                 fsp->fs_rtpref = fxdr_unsigned(u_int32_t, *tl++);
 3992                 fsp->fs_rtmult = fxdr_unsigned(u_int32_t, *tl++);
 3993                 fsp->fs_wtmax = fxdr_unsigned(u_int32_t, *tl++);
 3994                 fsp->fs_wtpref = fxdr_unsigned(u_int32_t, *tl++);
 3995                 fsp->fs_wtmult = fxdr_unsigned(u_int32_t, *tl++);
 3996                 fsp->fs_dtpref = fxdr_unsigned(u_int32_t, *tl++);
 3997                 fsp->fs_maxfilesize = fxdr_hyper(tl);
 3998                 tl += 2;
 3999                 fxdr_nfsv3time(tl, &fsp->fs_timedelta);
 4000                 tl += 2;
 4001                 fsp->fs_properties = fxdr_unsigned(u_int32_t, *tl);
 4002         }
 4003 nfsmout:
 4004         mbuf_freem(nd->nd_mrep);
 4005         return (error);
 4006 }
 4007 
 4008 /*
 4009  * This function performs the Renew RPC.
 4010  */
 4011 APPLESTATIC int
 4012 nfsrpc_renew(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
 4013 {
 4014         u_int32_t *tl;
 4015         struct nfsrv_descript nfsd;
 4016         struct nfsrv_descript *nd = &nfsd;
 4017         struct nfsmount *nmp;
 4018         int error;
 4019 
 4020         nmp = clp->nfsc_nmp;
 4021         if (nmp == NULL)
 4022                 return (0);
 4023         nfscl_reqstart(nd, NFSPROC_RENEW, nmp, NULL, 0, NULL);
 4024         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 4025         *tl++ = clp->nfsc_clientid.lval[0];
 4026         *tl = clp->nfsc_clientid.lval[1];
 4027         nd->nd_flag |= ND_USEGSSNAME;
 4028         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4029                 NFS_PROG, NFS_VER4, NULL, 1, NULL);
 4030         if (error)
 4031                 return (error);
 4032         error = nd->nd_repstat;
 4033         mbuf_freem(nd->nd_mrep);
 4034         return (error);
 4035 }
 4036 
 4037 /*
 4038  * This function performs the Releaselockowner RPC.
 4039  */
 4040 APPLESTATIC int
 4041 nfsrpc_rellockown(struct nfsmount *nmp, struct nfscllockowner *lp,
 4042     uint8_t *fh, int fhlen, struct ucred *cred, NFSPROC_T *p)
 4043 {
 4044         struct nfsrv_descript nfsd, *nd = &nfsd;
 4045         u_int32_t *tl;
 4046         int error;
 4047         uint8_t own[NFSV4CL_LOCKNAMELEN + NFSX_V4FHMAX];
 4048 
 4049         nfscl_reqstart(nd, NFSPROC_RELEASELCKOWN, nmp, NULL, 0, NULL);
 4050         NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 4051         *tl++ = nmp->nm_clp->nfsc_clientid.lval[0];
 4052         *tl = nmp->nm_clp->nfsc_clientid.lval[1];
 4053         NFSBCOPY(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN);
 4054         NFSBCOPY(fh, &own[NFSV4CL_LOCKNAMELEN], fhlen);
 4055         (void)nfsm_strtom(nd, own, NFSV4CL_LOCKNAMELEN + fhlen);
 4056         nd->nd_flag |= ND_USEGSSNAME;
 4057         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4058             NFS_PROG, NFS_VER4, NULL, 1, NULL);
 4059         if (error)
 4060                 return (error);
 4061         error = nd->nd_repstat;
 4062         mbuf_freem(nd->nd_mrep);
 4063         return (error);
 4064 }
 4065 
 4066 /*
 4067  * This function performs the Compound to get the mount pt FH.
 4068  */
 4069 APPLESTATIC int
 4070 nfsrpc_getdirpath(struct nfsmount *nmp, u_char *dirpath, struct ucred *cred,
 4071     NFSPROC_T *p)
 4072 {
 4073         u_int32_t *tl;
 4074         struct nfsrv_descript nfsd;
 4075         struct nfsrv_descript *nd = &nfsd;
 4076         u_char *cp, *cp2;
 4077         int error, cnt, len, setnil;
 4078         u_int32_t *opcntp;
 4079 
 4080         nfscl_reqstart(nd, NFSPROC_PUTROOTFH, nmp, NULL, 0, &opcntp);
 4081         cp = dirpath;
 4082         cnt = 0;
 4083         do {
 4084                 setnil = 0;
 4085                 while (*cp == '/')
 4086                         cp++;
 4087                 cp2 = cp;
 4088                 while (*cp2 != '\0' && *cp2 != '/')
 4089                         cp2++;
 4090                 if (*cp2 == '/') {
 4091                         setnil = 1;
 4092                         *cp2 = '\0';
 4093                 }
 4094                 if (cp2 != cp) {
 4095                         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 4096                         *tl = txdr_unsigned(NFSV4OP_LOOKUP);
 4097                         nfsm_strtom(nd, cp, strlen(cp));
 4098                         cnt++;
 4099                 }
 4100                 if (setnil)
 4101                         *cp2++ = '/';
 4102                 cp = cp2;
 4103         } while (*cp != '\0');
 4104         *opcntp = txdr_unsigned(2 + cnt);
 4105         NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
 4106         *tl = txdr_unsigned(NFSV4OP_GETFH);
 4107         nd->nd_flag |= ND_USEGSSNAME;
 4108         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4109                 NFS_PROG, NFS_VER4, NULL, 1, NULL);
 4110         if (error)
 4111                 return (error);
 4112         if (nd->nd_repstat == 0) {
 4113                 NFSM_DISSECT(tl, u_int32_t *, (3 + 2 * cnt) * NFSX_UNSIGNED);
 4114                 tl += (2 + 2 * cnt);
 4115                 if ((len = fxdr_unsigned(int, *tl)) <= 0 ||
 4116                         len > NFSX_FHMAX) {
 4117                         nd->nd_repstat = NFSERR_BADXDR;
 4118                 } else {
 4119                         nd->nd_repstat = nfsrv_mtostr(nd, nmp->nm_fh, len);
 4120                         if (nd->nd_repstat == 0)
 4121                                 nmp->nm_fhsize = len;
 4122                 }
 4123         }
 4124         error = nd->nd_repstat;
 4125 nfsmout:
 4126         mbuf_freem(nd->nd_mrep);
 4127         return (error);
 4128 }
 4129 
 4130 /*
 4131  * This function performs the Delegreturn RPC.
 4132  */
 4133 APPLESTATIC int
 4134 nfsrpc_delegreturn(struct nfscldeleg *dp, struct ucred *cred,
 4135     struct nfsmount *nmp, NFSPROC_T *p, int syscred)
 4136 {
 4137         u_int32_t *tl;
 4138         struct nfsrv_descript nfsd;
 4139         struct nfsrv_descript *nd = &nfsd;
 4140         int error;
 4141 
 4142         nfscl_reqstart(nd, NFSPROC_DELEGRETURN, nmp, dp->nfsdl_fh,
 4143             dp->nfsdl_fhlen, NULL);
 4144         NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
 4145         *tl++ = dp->nfsdl_stateid.seqid;
 4146         *tl++ = dp->nfsdl_stateid.other[0];
 4147         *tl++ = dp->nfsdl_stateid.other[1];
 4148         *tl = dp->nfsdl_stateid.other[2];
 4149         if (syscred)
 4150                 nd->nd_flag |= ND_USEGSSNAME;
 4151         error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred,
 4152             NFS_PROG, NFS_VER4, NULL, 1, NULL);
 4153         if (error)
 4154                 return (error);
 4155         error = nd->nd_repstat;
 4156         mbuf_freem(nd->nd_mrep);
 4157         return (error);
 4158 }
 4159 
 4160 /*
 4161  * nfs getacl call.
 4162  */
 4163 APPLESTATIC int
 4164 nfsrpc_getacl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4165     struct acl *aclp, void *stuff)
 4166 {
 4167         struct nfsrv_descript nfsd, *nd = &nfsd;
 4168         int error;
 4169         nfsattrbit_t attrbits;
 4170         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4171         
 4172         if (nfsrv_useacl == 0 || !NFSHASNFSV4(nmp))
 4173                 return (EOPNOTSUPP);
 4174         NFSCL_REQSTART(nd, NFSPROC_GETACL, vp);
 4175         NFSZERO_ATTRBIT(&attrbits);
 4176         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL);
 4177         (void) nfsrv_putattrbit(nd, &attrbits);
 4178         error = nfscl_request(nd, vp, p, cred, stuff);
 4179         if (error)
 4180                 return (error);
 4181         if (!nd->nd_repstat)
 4182                 error = nfsv4_loadattr(nd, vp, NULL, NULL, NULL, 0, NULL,
 4183                     NULL, NULL, NULL, aclp, 0, NULL, NULL, NULL, p, cred);
 4184         else
 4185                 error = nd->nd_repstat;
 4186         mbuf_freem(nd->nd_mrep);
 4187         return (error);
 4188 }
 4189 
 4190 /*
 4191  * nfs setacl call.
 4192  */
 4193 APPLESTATIC int
 4194 nfsrpc_setacl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4195     struct acl *aclp, void *stuff)
 4196 {
 4197         int error;
 4198         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4199         
 4200         if (nfsrv_useacl == 0 || !NFSHASNFSV4(nmp))
 4201                 return (EOPNOTSUPP);
 4202         error = nfsrpc_setattr(vp, NULL, aclp, cred, p, NULL, NULL, stuff);
 4203         return (error);
 4204 }
 4205 
 4206 /*
 4207  * nfs setacl call.
 4208  */
 4209 static int
 4210 nfsrpc_setaclrpc(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 4211     struct acl *aclp, nfsv4stateid_t *stateidp, void *stuff)
 4212 {
 4213         struct nfsrv_descript nfsd, *nd = &nfsd;
 4214         int error;
 4215         nfsattrbit_t attrbits;
 4216         struct nfsmount *nmp = VFSTONFS(vnode_mount(vp));
 4217         
 4218         if (!NFSHASNFSV4(nmp))
 4219                 return (EOPNOTSUPP);
 4220         NFSCL_REQSTART(nd, NFSPROC_SETACL, vp);
 4221         nfsm_stateidtom(nd, stateidp, NFSSTATEID_PUTSTATEID);
 4222         NFSZERO_ATTRBIT(&attrbits);
 4223         NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL);
 4224         (void) nfsv4_fillattr(nd, vnode_mount(vp), vp, aclp, NULL, NULL, 0,
 4225             &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0);
 4226         error = nfscl_request(nd, vp, p, cred, stuff);
 4227         if (error)
 4228                 return (error);
 4229         /* Don't care about the pre/postop attributes */
 4230         mbuf_freem(nd->nd_mrep);
 4231         return (nd->nd_repstat);
 4232 }

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