The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsclient/nfs_clstate.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2009 Rick Macklem, University of Guelph
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/9.0/sys/fs/nfsclient/nfs_clstate.c 223971 2011-07-13 00:48:36Z rmacklem $");
   30 
   31 /*
   32  * These functions implement the client side state handling for NFSv4.
   33  * NFSv4 state handling:
   34  * - A lockowner is used to determine lock contention, so it
   35  *   corresponds directly to a Posix pid. (1 to 1 mapping)
   36  * - The correct granularity of an OpenOwner is not nearly so
   37  *   obvious. An OpenOwner does the following:
   38  *   - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
   39  *   - is used to check for Open/Share contention (not applicable to
   40  *     this client, since all Opens are Deny_None)
   41  *   As such, I considered both extreme.
   42  *   1 OpenOwner per ClientID - Simple to manage, but fully serializes
   43  *   all Open, Close and Lock (with a new lockowner) Ops.
   44  *   1 OpenOwner for each Open - This one results in an OpenConfirm for
   45  *   every Open, for most servers.
   46  *   So, I chose to use the same mapping as I did for LockOwnwers.
   47  *   The main concern here is that you can end up with multiple Opens
   48  *   for the same File Handle, but on different OpenOwners (opens
   49  *   inherited from parents, grandparents...) and you do not know
   50  *   which of these the vnodeop close applies to. This is handled by
   51  *   delaying the Close Op(s) until all of the Opens have been closed.
   52  *   (It is not yet obvious if this is the correct granularity.)
   53  * - How the code handles serialization:
   54  *   - For the ClientId, it uses an exclusive lock while getting its
   55  *     SetClientId and during recovery. Otherwise, it uses a shared
   56  *     lock via a reference count.
   57  *   - For the rest of the data structures, it uses an SMP mutex
   58  *     (once the nfs client is SMP safe) and doesn't sleep while
   59  *     manipulating the linked lists.
   60  *   - The serialization of Open/Close/Lock/LockU falls out in the
   61  *     "wash", since OpenOwners and LockOwners are both mapped from
   62  *     Posix pid. In other words, there is only one Posix pid using
   63  *     any given owner, so that owner is serialized. (If you change
   64  *     the granularity of the OpenOwner, then code must be added to
   65  *     serialize Ops on the OpenOwner.)
   66  * - When to get rid of OpenOwners and LockOwners.
   67  *   - When a process exits, it calls nfscl_cleanup(), which goes
   68  *     through the client list looking for all Open and Lock Owners.
   69  *     When one is found, it is marked "defunct" or in the case of
   70  *     an OpenOwner without any Opens, freed.
   71  *     The renew thread scans for defunct Owners and gets rid of them,
   72  *     if it can. The LockOwners will also be deleted when the
   73  *     associated Open is closed.
   74  *   - If the LockU or Close Op(s) fail during close in a way
   75  *     that could be recovered upon retry, they are relinked to the
   76  *     ClientId's defunct open list and retried by the renew thread
   77  *     until they succeed or an unmount/recovery occurs.
   78  *     (Since we are done with them, they do not need to be recovered.)
   79  */
   80 
   81 #ifndef APPLEKEXT
   82 #include <fs/nfs/nfsport.h>
   83 
   84 /*
   85  * Global variables
   86  */
   87 extern struct nfsstats newnfsstats;
   88 extern struct nfsreqhead nfsd_reqq;
   89 NFSREQSPINLOCK;
   90 NFSCLSTATEMUTEX;
   91 int nfscl_inited = 0;
   92 struct nfsclhead nfsclhead;     /* Head of clientid list */
   93 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
   94 #endif  /* !APPLEKEXT */
   95 
   96 static int nfscl_delegcnt = 0;
   97 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *,
   98     u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **);
   99 static void nfscl_clrelease(struct nfsclclient *);
  100 static void nfscl_cleanclient(struct nfsclclient *);
  101 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
  102     struct ucred *, NFSPROC_T *);
  103 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
  104     struct nfsmount *, struct ucred *, NFSPROC_T *);
  105 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *);
  106 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
  107     struct nfscllock *, int);
  108 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
  109     struct nfscllock **, int);
  110 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
  111 static u_int32_t nfscl_nextcbident(void);
  112 static mount_t nfscl_getmnt(u_int32_t);
  113 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
  114     int);
  115 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
  116     u_int8_t *, struct nfscllock **);
  117 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
  118 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
  119     struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
  120 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
  121     struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
  122     struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *);
  123 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
  124     struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
  125     struct nfscldeleg *, struct ucred *, NFSPROC_T *);
  126 static void nfscl_totalrecall(struct nfsclclient *);
  127 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
  128     struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
  129 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
  130     u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
  131     struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
  132 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
  133     int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
  134     struct ucred *, NFSPROC_T *);
  135 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
  136     struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
  137 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *);
  138 static int nfscl_errmap(struct nfsrv_descript *);
  139 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
  140 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
  141     struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int);
  142 static void nfscl_freeopenowner(struct nfsclowner *, int);
  143 static void nfscl_cleandeleg(struct nfscldeleg *);
  144 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *,
  145     struct nfsmount *, NFSPROC_T *);
  146 
  147 static short nfscberr_null[] = {
  148         0,
  149         0,
  150 };
  151 
  152 static short nfscberr_getattr[] = {
  153         NFSERR_RESOURCE,
  154         NFSERR_BADHANDLE,
  155         NFSERR_BADXDR,
  156         NFSERR_RESOURCE,
  157         NFSERR_SERVERFAULT,
  158         0,
  159 };
  160 
  161 static short nfscberr_recall[] = {
  162         NFSERR_RESOURCE,
  163         NFSERR_BADHANDLE,
  164         NFSERR_BADSTATEID,
  165         NFSERR_BADXDR,
  166         NFSERR_RESOURCE,
  167         NFSERR_SERVERFAULT,
  168         0,
  169 };
  170 
  171 static short *nfscl_cberrmap[] = {
  172         nfscberr_null,
  173         nfscberr_null,
  174         nfscberr_null,
  175         nfscberr_getattr,
  176         nfscberr_recall
  177 };
  178 
  179 #define NETFAMILY(clp) \
  180                 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
  181 
  182 /*
  183  * Called for an open operation.
  184  * If the nfhp argument is NULL, just get an openowner.
  185  */
  186 APPLESTATIC int
  187 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
  188     struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
  189     struct nfsclopen **opp, int *newonep, int *retp, int lockit)
  190 {
  191         struct nfsclclient *clp;
  192         struct nfsclowner *owp, *nowp;
  193         struct nfsclopen *op = NULL, *nop = NULL;
  194         struct nfscldeleg *dp;
  195         struct nfsclownerhead *ohp;
  196         u_int8_t own[NFSV4CL_LOCKNAMELEN];
  197         int ret;
  198 
  199         if (newonep != NULL)
  200                 *newonep = 0;
  201         if (opp != NULL)
  202                 *opp = NULL;
  203         if (owpp != NULL)
  204                 *owpp = NULL;
  205 
  206         /*
  207          * Might need one or both of these, so MALLOC them now, to
  208          * avoid a tsleep() in MALLOC later.
  209          */
  210         MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner),
  211             M_NFSCLOWNER, M_WAITOK);
  212         if (nfhp != NULL)
  213             MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
  214                 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
  215         ret = nfscl_getcl(vp, cred, p, &clp);
  216         if (ret != 0) {
  217                 FREE((caddr_t)nowp, M_NFSCLOWNER);
  218                 if (nop != NULL)
  219                         FREE((caddr_t)nop, M_NFSCLOPEN);
  220                 return (ret);
  221         }
  222 
  223         /*
  224          * Get the Open iff it already exists.
  225          * If none found, add the new one or return error, depending upon
  226          * "create".
  227          */
  228         nfscl_filllockowner(p->td_proc, own, F_POSIX);
  229         NFSLOCKCLSTATE();
  230         dp = NULL;
  231         /* First check the delegation list */
  232         if (nfhp != NULL && usedeleg) {
  233                 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
  234                         if (dp->nfsdl_fhlen == fhlen &&
  235                             !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
  236                                 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
  237                                     (dp->nfsdl_flags & NFSCLDL_WRITE))
  238                                         break;
  239                                 dp = NULL;
  240                                 break;
  241                         }
  242                 }
  243         }
  244 
  245         if (dp != NULL)
  246                 ohp = &dp->nfsdl_owner;
  247         else
  248                 ohp = &clp->nfsc_owner;
  249         /* Now, search for an openowner */
  250         LIST_FOREACH(owp, ohp, nfsow_list) {
  251                 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
  252                         break;
  253         }
  254 
  255         /*
  256          * Create a new open, as required.
  257          */
  258         nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
  259             newonep);
  260 
  261         /*
  262          * Serialize modifications to the open owner for multiple threads
  263          * within the same process using a read/write sleep lock.
  264          */
  265         if (lockit)
  266                 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
  267         NFSUNLOCKCLSTATE();
  268         if (nowp != NULL)
  269                 FREE((caddr_t)nowp, M_NFSCLOWNER);
  270         if (nop != NULL)
  271                 FREE((caddr_t)nop, M_NFSCLOPEN);
  272         if (owpp != NULL)
  273                 *owpp = owp;
  274         if (opp != NULL)
  275                 *opp = op;
  276         if (retp != NULL) {
  277                 if (nfhp != NULL && dp != NULL && nop == NULL)
  278                         /* new local open on delegation */
  279                         *retp = NFSCLOPEN_SETCRED;
  280                 else
  281                         *retp = NFSCLOPEN_OK;
  282         }
  283 
  284         /*
  285          * Now, check the mode on the open and return the appropriate
  286          * value.
  287          */
  288         if (op != NULL && (amode & ~(op->nfso_mode))) {
  289                 op->nfso_mode |= amode;
  290                 if (retp != NULL && dp == NULL)
  291                         *retp = NFSCLOPEN_DOOPEN;
  292         }
  293         return (0);
  294 }
  295 
  296 /*
  297  * Create a new open, as required.
  298  */
  299 static void
  300 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
  301     struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
  302     struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
  303     int *newonep)
  304 {
  305         struct nfsclowner *owp = *owpp, *nowp;
  306         struct nfsclopen *op, *nop;
  307 
  308         if (nowpp != NULL)
  309                 nowp = *nowpp;
  310         else
  311                 nowp = NULL;
  312         if (nopp != NULL)
  313                 nop = *nopp;
  314         else
  315                 nop = NULL;
  316         if (owp == NULL && nowp != NULL) {
  317                 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
  318                 LIST_INIT(&nowp->nfsow_open);
  319                 nowp->nfsow_clp = clp;
  320                 nowp->nfsow_seqid = 0;
  321                 nowp->nfsow_defunct = 0;
  322                 nfscl_lockinit(&nowp->nfsow_rwlock);
  323                 if (dp != NULL) {
  324                         newnfsstats.cllocalopenowners++;
  325                         LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
  326                 } else {
  327                         newnfsstats.clopenowners++;
  328                         LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
  329                 }
  330                 owp = *owpp = nowp;
  331                 *nowpp = NULL;
  332                 if (newonep != NULL)
  333                         *newonep = 1;
  334         }
  335 
  336          /* If an fhp has been specified, create an Open as well. */
  337         if (fhp != NULL) {
  338                 /* and look for the correct open, based upon FH */
  339                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
  340                         if (op->nfso_fhlen == fhlen &&
  341                             !NFSBCMP(op->nfso_fh, fhp, fhlen))
  342                                 break;
  343                 }
  344                 if (op == NULL && nop != NULL) {
  345                         nop->nfso_own = owp;
  346                         nop->nfso_mode = 0;
  347                         nop->nfso_opencnt = 0;
  348                         nop->nfso_posixlock = 1;
  349                         nop->nfso_fhlen = fhlen;
  350                         NFSBCOPY(fhp, nop->nfso_fh, fhlen);
  351                         LIST_INIT(&nop->nfso_lock);
  352                         nop->nfso_stateid.seqid = 0;
  353                         nop->nfso_stateid.other[0] = 0;
  354                         nop->nfso_stateid.other[1] = 0;
  355                         nop->nfso_stateid.other[2] = 0;
  356                         if (dp != NULL) {
  357                                 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
  358                                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
  359                                     nfsdl_list);
  360                                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
  361                                 newnfsstats.cllocalopens++;
  362                         } else {
  363                                 newnfsstats.clopens++;
  364                         }
  365                         LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
  366                         *opp = nop;
  367                         *nopp = NULL;
  368                         if (newonep != NULL)
  369                                 *newonep = 1;
  370                 } else {
  371                         *opp = op;
  372                 }
  373         }
  374 }
  375 
  376 /*
  377  * Called to find/add a delegation to a client.
  378  */
  379 APPLESTATIC int
  380 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
  381     int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
  382 {
  383         struct nfscldeleg *dp = *dpp, *tdp;
  384 
  385         /*
  386          * First, if we have received a Read delegation for a file on a
  387          * read/write file system, just return it, because they aren't
  388          * useful, imho.
  389          */
  390         if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) &&
  391             (dp->nfsdl_flags & NFSCLDL_READ)) {
  392                 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p);
  393                 FREE((caddr_t)dp, M_NFSCLDELEG);
  394                 *dpp = NULL;
  395                 return (0);
  396         }
  397 
  398         /* Look for the correct deleg, based upon FH */
  399         NFSLOCKCLSTATE();
  400         tdp = nfscl_finddeleg(clp, nfhp, fhlen);
  401         if (tdp == NULL) {
  402                 if (dp == NULL) {
  403                         NFSUNLOCKCLSTATE();
  404                         return (NFSERR_BADSTATEID);
  405                 }
  406                 *dpp = NULL;
  407                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
  408                 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
  409                     nfsdl_hash);
  410                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
  411                 newnfsstats.cldelegates++;
  412                 nfscl_delegcnt++;
  413         } else {
  414                 /*
  415                  * Delegation already exists, what do we do if a new one??
  416                  */
  417                 if (dp != NULL) {
  418                         printf("Deleg already exists!\n");
  419                         FREE((caddr_t)dp, M_NFSCLDELEG);
  420                         *dpp = NULL;
  421                 } else {
  422                         *dpp = tdp;
  423                 }
  424         }
  425         NFSUNLOCKCLSTATE();
  426         return (0);
  427 }
  428 
  429 /*
  430  * Find a delegation for this file handle. Return NULL upon failure.
  431  */
  432 static struct nfscldeleg *
  433 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
  434 {
  435         struct nfscldeleg *dp;
  436 
  437         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
  438             if (dp->nfsdl_fhlen == fhlen &&
  439                 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
  440                 break;
  441         }
  442         return (dp);
  443 }
  444 
  445 /*
  446  * Get a stateid for an I/O operation. First, look for an open and iff
  447  * found, return either a lockowner stateid or the open stateid.
  448  * If no Open is found, just return error and the special stateid of all zeros.
  449  */
  450 APPLESTATIC int
  451 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
  452     struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
  453     void **lckpp)
  454 {
  455         struct nfsclclient *clp;
  456         struct nfsclowner *owp;
  457         struct nfsclopen *op = NULL;
  458         struct nfscllockowner *lp;
  459         struct nfscldeleg *dp;
  460         struct nfsnode *np;
  461         u_int8_t own[NFSV4CL_LOCKNAMELEN];
  462         int error, done;
  463 
  464         *lckpp = NULL;
  465         /*
  466          * Initially, just set the special stateid of all zeros.
  467          */
  468         stateidp->seqid = 0;
  469         stateidp->other[0] = 0;
  470         stateidp->other[1] = 0;
  471         stateidp->other[2] = 0;
  472         if (vnode_vtype(vp) != VREG)
  473                 return (EISDIR);
  474         np = VTONFS(vp);
  475         NFSLOCKCLSTATE();
  476         clp = nfscl_findcl(VFSTONFS(vnode_mount(vp)));
  477         if (clp == NULL) {
  478                 NFSUNLOCKCLSTATE();
  479                 return (EACCES);
  480         }
  481 
  482         /*
  483          * Wait for recovery to complete.
  484          */
  485         while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
  486                 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
  487                     PZERO, "nfsrecvr", NULL);
  488 
  489         /*
  490          * First, look for a delegation.
  491          */
  492         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
  493                 if (dp->nfsdl_fhlen == fhlen &&
  494                     !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
  495                         if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
  496                             (dp->nfsdl_flags & NFSCLDL_WRITE)) {
  497                                 stateidp->seqid = dp->nfsdl_stateid.seqid;
  498                                 stateidp->other[0] = dp->nfsdl_stateid.other[0];
  499                                 stateidp->other[1] = dp->nfsdl_stateid.other[1];
  500                                 stateidp->other[2] = dp->nfsdl_stateid.other[2];
  501                                 if (!(np->n_flag & NDELEGRECALL)) {
  502                                         TAILQ_REMOVE(&clp->nfsc_deleg, dp,
  503                                             nfsdl_list);
  504                                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
  505                                             nfsdl_list);
  506                                         dp->nfsdl_timestamp = NFSD_MONOSEC +
  507                                             120;
  508                                         dp->nfsdl_rwlock.nfslock_usecnt++;
  509                                         *lckpp = (void *)&dp->nfsdl_rwlock;
  510                                 }
  511                                 NFSUNLOCKCLSTATE();
  512                                 return (0);
  513                         }
  514                         break;
  515                 }
  516         }
  517 
  518         if (p != NULL) {
  519                 /*
  520                  * If p != NULL, we want to search the parentage tree
  521                  * for a matching OpenOwner and use that.
  522                  */
  523                 nfscl_filllockowner(p->td_proc, own, F_POSIX);
  524                 lp = NULL;
  525                 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own,
  526                     mode, &lp, &op);
  527                 if (error == 0 && lp != NULL) {
  528                         stateidp->seqid =
  529                             lp->nfsl_stateid.seqid;
  530                         stateidp->other[0] =
  531                             lp->nfsl_stateid.other[0];
  532                         stateidp->other[1] =
  533                             lp->nfsl_stateid.other[1];
  534                         stateidp->other[2] =
  535                             lp->nfsl_stateid.other[2];
  536                         NFSUNLOCKCLSTATE();
  537                         return (0);
  538                 }
  539         }
  540         if (op == NULL) {
  541                 /* If not found, just look for any OpenOwner that will work. */
  542                 done = 0;
  543                 owp = LIST_FIRST(&clp->nfsc_owner);
  544                 while (!done && owp != NULL) {
  545                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
  546                                 if (op->nfso_fhlen == fhlen &&
  547                                     !NFSBCMP(op->nfso_fh, nfhp, fhlen) &&
  548                                     (mode & op->nfso_mode) == mode) {
  549                                         done = 1;
  550                                         break;
  551                                 }
  552                         }
  553                         if (!done)
  554                                 owp = LIST_NEXT(owp, nfsow_list);
  555                 }
  556                 if (!done) {
  557                         NFSUNLOCKCLSTATE();
  558                         return (ENOENT);
  559                 }
  560                 /* for read aheads or write behinds, use the open cred */
  561                 newnfs_copycred(&op->nfso_cred, cred);
  562         }
  563 
  564         /*
  565          * No lock stateid, so return the open stateid.
  566          */
  567         stateidp->seqid = op->nfso_stateid.seqid;
  568         stateidp->other[0] = op->nfso_stateid.other[0];
  569         stateidp->other[1] = op->nfso_stateid.other[1];
  570         stateidp->other[2] = op->nfso_stateid.other[2];
  571         NFSUNLOCKCLSTATE();
  572         return (0);
  573 }
  574 
  575 /*
  576  * Search for a matching file, mode and, optionally, lockowner.
  577  */
  578 static int
  579 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen,
  580     u_int8_t *openown, u_int8_t *lockown, u_int32_t mode,
  581     struct nfscllockowner **lpp, struct nfsclopen **opp)
  582 {
  583         struct nfsclowner *owp;
  584         struct nfsclopen *op, *rop, *rop2;
  585         struct nfscllockowner *lp;
  586         int keep_looping;
  587 
  588         if (lpp != NULL)
  589                 *lpp = NULL;
  590         /*
  591          * rop will be set to the open to be returned. There are three
  592          * variants of this, all for an open of the correct file:
  593          * 1 - A match of lockown.
  594          * 2 - A match of the openown, when no lockown match exists.
  595          * 3 - A match for any open, if no openown or lockown match exists.
  596          * Looking for #2 over #3 probably isn't necessary, but since
  597          * RFC3530 is vague w.r.t. the relationship between openowners and
  598          * lockowners, I think this is the safer way to go.
  599          */
  600         rop = NULL;
  601         rop2 = NULL;
  602         keep_looping = 1;
  603         /* Search the client list */
  604         owp = LIST_FIRST(ohp);
  605         while (owp != NULL && keep_looping != 0) {
  606                 /* and look for the correct open */
  607                 op = LIST_FIRST(&owp->nfsow_open);
  608                 while (op != NULL && keep_looping != 0) {
  609                         if (op->nfso_fhlen == fhlen &&
  610                             !NFSBCMP(op->nfso_fh, nfhp, fhlen)
  611                             && (op->nfso_mode & mode) == mode) {
  612                                 if (lpp != NULL) {
  613                                         /* Now look for a matching lockowner. */
  614                                         LIST_FOREACH(lp, &op->nfso_lock,
  615                                             nfsl_list) {
  616                                                 if (!NFSBCMP(lp->nfsl_owner,
  617                                                     lockown,
  618                                                     NFSV4CL_LOCKNAMELEN)) {
  619                                                         *lpp = lp;
  620                                                         rop = op;
  621                                                         keep_looping = 0;
  622                                                         break;
  623                                                 }
  624                                         }
  625                                 }
  626                                 if (rop == NULL && !NFSBCMP(owp->nfsow_owner,
  627                                     openown, NFSV4CL_LOCKNAMELEN)) {
  628                                         rop = op;
  629                                         if (lpp == NULL)
  630                                                 keep_looping = 0;
  631                                 }
  632                                 if (rop2 == NULL)
  633                                         rop2 = op;
  634                         }
  635                         op = LIST_NEXT(op, nfso_list);
  636                 }
  637                 owp = LIST_NEXT(owp, nfsow_list);
  638         }
  639         if (rop == NULL)
  640                 rop = rop2;
  641         if (rop == NULL)
  642                 return (EBADF);
  643         *opp = rop;
  644         return (0);
  645 }
  646 
  647 /*
  648  * Release use of an open owner. Called when open operations are done
  649  * with the open owner.
  650  */
  651 APPLESTATIC void
  652 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error,
  653     __unused int candelete, int unlocked)
  654 {
  655 
  656         if (owp == NULL)
  657                 return;
  658         NFSLOCKCLSTATE();
  659         if (!unlocked)
  660                 nfscl_lockunlock(&owp->nfsow_rwlock);
  661         nfscl_clrelease(owp->nfsow_clp);
  662         NFSUNLOCKCLSTATE();
  663 }
  664 
  665 /*
  666  * Release use of an open structure under an open owner.
  667  */
  668 APPLESTATIC void
  669 nfscl_openrelease(struct nfsclopen *op, int error, int candelete)
  670 {
  671         struct nfsclclient *clp;
  672         struct nfsclowner *owp;
  673 
  674         if (op == NULL)
  675                 return;
  676         NFSLOCKCLSTATE();
  677         owp = op->nfso_own;
  678         nfscl_lockunlock(&owp->nfsow_rwlock);
  679         clp = owp->nfsow_clp;
  680         if (error && candelete && op->nfso_opencnt == 0)
  681                 nfscl_freeopen(op, 0);
  682         nfscl_clrelease(clp);
  683         NFSUNLOCKCLSTATE();
  684 }
  685 
  686 /*
  687  * Called to get a clientid structure. It will optionally lock the
  688  * client data structures to do the SetClientId/SetClientId_confirm,
  689  * but will release that lock and return the clientid with a refernce
  690  * count on it.
  691  * If the "cred" argument is NULL, a new clientid should not be created.
  692  * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
  693  * be done.
  694  * It always clpp with a reference count on it, unless returning an error.
  695  */
  696 APPLESTATIC int
  697 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
  698     struct nfsclclient **clpp)
  699 {
  700         struct nfsclclient *clp;
  701         struct nfsclclient *newclp = NULL;
  702         struct nfscllockowner *lp, *nlp;
  703         struct mount *mp;
  704         struct nfsmount *nmp;
  705         char uuid[HOSTUUIDLEN];
  706         int igotlock = 0, error, trystalecnt, clidinusedelay, i;
  707         u_int16_t idlen = 0;
  708 
  709         mp = vnode_mount(vp);
  710         nmp = VFSTONFS(mp);
  711         if (cred != NULL) {
  712                 getcredhostuuid(cred, uuid, sizeof uuid);
  713                 idlen = strlen(uuid);
  714                 if (idlen > 0)
  715                         idlen += sizeof (u_int64_t);
  716                 else
  717                         idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
  718                 MALLOC(newclp, struct nfsclclient *,
  719                     sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
  720                     M_WAITOK);
  721         }
  722         NFSLOCKCLSTATE();
  723         /*
  724          * If a forced dismount is already in progress, don't
  725          * allocate a new clientid and get out now. For the case where
  726          * clp != NULL, this is a harmless optimization.
  727          */
  728         if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
  729                 NFSUNLOCKCLSTATE();
  730                 if (newclp != NULL)
  731                         free(newclp, M_NFSCLCLIENT);
  732                 return (EBADF);
  733         }
  734         clp = nmp->nm_clp;
  735         if (clp == NULL) {
  736                 if (newclp == NULL) {
  737                         NFSUNLOCKCLSTATE();
  738                         return (EACCES);
  739                 }
  740                 clp = newclp;
  741                 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1);
  742                 clp->nfsc_idlen = idlen;
  743                 LIST_INIT(&clp->nfsc_owner);
  744                 TAILQ_INIT(&clp->nfsc_deleg);
  745                 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
  746                         LIST_INIT(&clp->nfsc_deleghash[i]);
  747                 LIST_INIT(&clp->nfsc_defunctlockowner);
  748                 clp->nfsc_flags = NFSCLFLAGS_INITED;
  749                 clp->nfsc_clientidrev = 1;
  750                 clp->nfsc_cbident = nfscl_nextcbident();
  751                 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
  752                     clp->nfsc_idlen);
  753                 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
  754                 nmp->nm_clp = clp;
  755                 clp->nfsc_nmp = nmp;
  756                 NFSUNLOCKCLSTATE();
  757                 nfscl_start_renewthread(clp);
  758         } else {
  759                 NFSUNLOCKCLSTATE();
  760                 if (newclp != NULL)
  761                         FREE((caddr_t)newclp, M_NFSCLCLIENT);
  762         }
  763         NFSLOCKCLSTATE();
  764         while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
  765             (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0)
  766                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
  767                     NFSCLSTATEMUTEXPTR, mp);
  768         if (!igotlock)
  769                 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
  770         if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
  771                 /*
  772                  * Both nfsv4_lock() and nfsv4_getref() know to check
  773                  * for MNTK_UNMOUNTF and return without sleeping to
  774                  * wait for the exclusive lock to be released, since it
  775                  * might be held by nfscl_umount() and we need to get out
  776                  * now for that case and not wait until nfscl_umount()
  777                  * releases it.
  778                  */
  779                 NFSUNLOCKCLSTATE();
  780                 return (EBADF);
  781         }
  782         NFSUNLOCKCLSTATE();
  783 
  784         /*
  785          * If it needs a clientid, do the setclientid now.
  786          */
  787         if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
  788                 if (!igotlock)
  789                         panic("nfscl_clget");
  790                 if (p == NULL || cred == NULL) {
  791                         NFSLOCKCLSTATE();
  792                         nfsv4_unlock(&clp->nfsc_lock, 0);
  793                         NFSUNLOCKCLSTATE();
  794                         return (EACCES);
  795                 }
  796                 /* get rid of defunct lockowners */
  797                 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list,
  798                     nlp) {
  799                         nfscl_freelockowner(lp, 0);
  800                 }
  801                 /*
  802                  * If RFC3530 Sec. 14.2.33 is taken literally,
  803                  * NFSERR_CLIDINUSE will be returned persistently for the
  804                  * case where a new mount of the same file system is using
  805                  * a different principal. In practice, NFSERR_CLIDINUSE is
  806                  * only returned when there is outstanding unexpired state
  807                  * on the clientid. As such, try for twice the lease
  808                  * interval, if we know what that is. Otherwise, make a
  809                  * wild ass guess.
  810                  * The case of returning NFSERR_STALECLIENTID is far less
  811                  * likely, but might occur if there is a significant delay
  812                  * between doing the SetClientID and SetClientIDConfirm Ops,
  813                  * such that the server throws away the clientid before
  814                  * receiving the SetClientIDConfirm.
  815                  */
  816                 if (clp->nfsc_renew > 0)
  817                         clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
  818                 else
  819                         clidinusedelay = 120;
  820                 trystalecnt = 3;
  821                 do {
  822                         error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)),
  823                             clp, cred, p);
  824                         if (error == NFSERR_STALECLIENTID ||
  825                             error == NFSERR_STALEDONTRECOVER ||
  826                             error == NFSERR_CLIDINUSE) {
  827                                 (void) nfs_catnap(PZERO, error, "nfs_setcl");
  828                         }
  829                 } while (((error == NFSERR_STALECLIENTID ||
  830                      error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
  831                     (error == NFSERR_CLIDINUSE && --clidinusedelay > 0));
  832                 if (error) {
  833                         NFSLOCKCLSTATE();
  834                         nfsv4_unlock(&clp->nfsc_lock, 0);
  835                         NFSUNLOCKCLSTATE();
  836                         return (error);
  837                 }
  838                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
  839         }
  840         if (igotlock) {
  841                 NFSLOCKCLSTATE();
  842                 nfsv4_unlock(&clp->nfsc_lock, 1);
  843                 NFSUNLOCKCLSTATE();
  844         }
  845 
  846         *clpp = clp;
  847         return (0);
  848 }
  849 
  850 /*
  851  * Get a reference to a clientid and return it, if valid.
  852  */
  853 APPLESTATIC struct nfsclclient *
  854 nfscl_findcl(struct nfsmount *nmp)
  855 {
  856         struct nfsclclient *clp;
  857 
  858         clp = nmp->nm_clp;
  859         if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
  860                 return (NULL);
  861         return (clp);
  862 }
  863 
  864 /*
  865  * Release the clientid structure. It may be locked or reference counted.
  866  */
  867 static void
  868 nfscl_clrelease(struct nfsclclient *clp)
  869 {
  870 
  871         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
  872                 nfsv4_unlock(&clp->nfsc_lock, 0);
  873         else
  874                 nfsv4_relref(&clp->nfsc_lock);
  875 }
  876 
  877 /*
  878  * External call for nfscl_clrelease.
  879  */
  880 APPLESTATIC void
  881 nfscl_clientrelease(struct nfsclclient *clp)
  882 {
  883 
  884         NFSLOCKCLSTATE();
  885         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
  886                 nfsv4_unlock(&clp->nfsc_lock, 0);
  887         else
  888                 nfsv4_relref(&clp->nfsc_lock);
  889         NFSUNLOCKCLSTATE();
  890 }
  891 
  892 /*
  893  * Called when wanting to lock a byte region.
  894  */
  895 APPLESTATIC int
  896 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
  897     short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
  898     int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
  899     struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
  900 {
  901         struct nfscllockowner *lp;
  902         struct nfsclopen *op;
  903         struct nfsclclient *clp;
  904         struct nfscllockowner *nlp;
  905         struct nfscllock *nlop, *otherlop;
  906         struct nfscldeleg *dp = NULL, *ldp = NULL;
  907         struct nfscllockownerhead *lhp = NULL;
  908         struct nfsnode *np;
  909         u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
  910         u_int8_t *openownp;
  911         int error = 0, ret, donelocally = 0;
  912         u_int32_t mode;
  913 
  914         /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
  915         mode = 0;
  916         np = VTONFS(vp);
  917         *lpp = NULL;
  918         lp = NULL;
  919         *newonep = 0;
  920         *donelocallyp = 0;
  921 
  922         /*
  923          * Might need these, so MALLOC them now, to
  924          * avoid a tsleep() in MALLOC later.
  925          */
  926         MALLOC(nlp, struct nfscllockowner *,
  927             sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
  928         MALLOC(otherlop, struct nfscllock *,
  929             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
  930         MALLOC(nlop, struct nfscllock *,
  931             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
  932         nlop->nfslo_type = type;
  933         nlop->nfslo_first = off;
  934         if (len == NFS64BITSSET) {
  935                 nlop->nfslo_end = NFS64BITSSET;
  936         } else {
  937                 nlop->nfslo_end = off + len;
  938                 if (nlop->nfslo_end <= nlop->nfslo_first)
  939                         error = NFSERR_INVAL;
  940         }
  941 
  942         if (!error) {
  943                 if (recovery)
  944                         clp = rclp;
  945                 else
  946                         error = nfscl_getcl(vp, cred, p, &clp);
  947         }
  948         if (error) {
  949                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
  950                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
  951                 FREE((caddr_t)nlop, M_NFSCLLOCK);
  952                 return (error);
  953         }
  954 
  955         op = NULL;
  956         if (recovery) {
  957                 ownp = rownp;
  958                 openownp = ropenownp;
  959         } else {
  960                 nfscl_filllockowner(id, own, flags);
  961                 ownp = own;
  962                 nfscl_filllockowner(p->td_proc, openown, F_POSIX);
  963                 openownp = openown;
  964         }
  965         if (!recovery) {
  966                 NFSLOCKCLSTATE();
  967                 /*
  968                  * First, search for a delegation. If one exists for this file,
  969                  * the lock can be done locally against it, so long as there
  970                  * isn't a local lock conflict.
  971                  */
  972                 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
  973                     np->n_fhp->nfh_len);
  974                 /* Just sanity check for correct type of delegation */
  975                 if (dp != NULL && ((dp->nfsdl_flags &
  976                     (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
  977                      (type == F_WRLCK &&
  978                       (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
  979                         dp = NULL;
  980         }
  981         if (dp != NULL) {
  982                 /* Now, find an open and maybe a lockowner. */
  983                 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh,
  984                     np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
  985                 if (ret)
  986                         ret = nfscl_getopen(&clp->nfsc_owner,
  987                             np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
  988                             ownp, mode, NULL, &op);
  989                 if (!ret) {
  990                         lhp = &dp->nfsdl_lock;
  991                         TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
  992                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
  993                         dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
  994                         donelocally = 1;
  995                 } else {
  996                         dp = NULL;
  997                 }
  998         }
  999         if (!donelocally) {
 1000                 /*
 1001                  * Get the related Open and maybe lockowner.
 1002                  */
 1003                 error = nfscl_getopen(&clp->nfsc_owner,
 1004                     np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
 1005                     ownp, mode, &lp, &op);
 1006                 if (!error)
 1007                         lhp = &op->nfso_lock;
 1008         }
 1009         if (!error && !recovery)
 1010                 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
 1011                     np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
 1012         if (error) {
 1013                 if (!recovery) {
 1014                         nfscl_clrelease(clp);
 1015                         NFSUNLOCKCLSTATE();
 1016                 }
 1017                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
 1018                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
 1019                 FREE((caddr_t)nlop, M_NFSCLLOCK);
 1020                 return (error);
 1021         }
 1022 
 1023         /*
 1024          * Ok, see if a lockowner exists and create one, as required.
 1025          */
 1026         if (lp == NULL)
 1027                 LIST_FOREACH(lp, lhp, nfsl_list) {
 1028                         if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
 1029                                 break;
 1030                 }
 1031         if (lp == NULL) {
 1032                 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
 1033                 if (recovery)
 1034                         NFSBCOPY(ropenownp, nlp->nfsl_openowner,
 1035                             NFSV4CL_LOCKNAMELEN);
 1036                 else
 1037                         NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
 1038                             NFSV4CL_LOCKNAMELEN);
 1039                 nlp->nfsl_seqid = 0;
 1040                 nlp->nfsl_defunct = 0;
 1041                 nlp->nfsl_inprog = NULL;
 1042                 nfscl_lockinit(&nlp->nfsl_rwlock);
 1043                 LIST_INIT(&nlp->nfsl_lock);
 1044                 if (donelocally) {
 1045                         nlp->nfsl_open = NULL;
 1046                         newnfsstats.cllocallockowners++;
 1047                 } else {
 1048                         nlp->nfsl_open = op;
 1049                         newnfsstats.cllockowners++;
 1050                 }
 1051                 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
 1052                 lp = nlp;
 1053                 nlp = NULL;
 1054                 *newonep = 1;
 1055         }
 1056 
 1057         /*
 1058          * Now, update the byte ranges for locks.
 1059          */
 1060         ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
 1061         if (!ret)
 1062                 donelocally = 1;
 1063         if (donelocally) {
 1064                 *donelocallyp = 1;
 1065                 if (!recovery)
 1066                         nfscl_clrelease(clp);
 1067         } else {
 1068                 /*
 1069                  * Serial modifications on the lock owner for multiple threads
 1070                  * for the same process using a read/write lock.
 1071                  */
 1072                 if (!recovery)
 1073                         nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
 1074         }
 1075         if (!recovery)
 1076                 NFSUNLOCKCLSTATE();
 1077 
 1078         if (nlp)
 1079                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
 1080         if (nlop)
 1081                 FREE((caddr_t)nlop, M_NFSCLLOCK);
 1082         if (otherlop)
 1083                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
 1084 
 1085         *lpp = lp;
 1086         return (0);
 1087 }
 1088 
 1089 /*
 1090  * Called to unlock a byte range, for LockU.
 1091  */
 1092 APPLESTATIC int
 1093 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
 1094     __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
 1095     struct nfsclclient *clp, void *id, int flags,
 1096     struct nfscllockowner **lpp, int *dorpcp)
 1097 {
 1098         struct nfscllockowner *lp;
 1099         struct nfsclowner *owp;
 1100         struct nfsclopen *op;
 1101         struct nfscllock *nlop, *other_lop = NULL;
 1102         struct nfscldeleg *dp;
 1103         struct nfsnode *np;
 1104         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 1105         int ret = 0, fnd;
 1106 
 1107         np = VTONFS(vp);
 1108         *lpp = NULL;
 1109         *dorpcp = 0;
 1110 
 1111         /*
 1112          * Might need these, so MALLOC them now, to
 1113          * avoid a tsleep() in MALLOC later.
 1114          */
 1115         MALLOC(nlop, struct nfscllock *,
 1116             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
 1117         nlop->nfslo_type = F_UNLCK;
 1118         nlop->nfslo_first = off;
 1119         if (len == NFS64BITSSET) {
 1120                 nlop->nfslo_end = NFS64BITSSET;
 1121         } else {
 1122                 nlop->nfslo_end = off + len;
 1123                 if (nlop->nfslo_end <= nlop->nfslo_first) {
 1124                         FREE((caddr_t)nlop, M_NFSCLLOCK);
 1125                         return (NFSERR_INVAL);
 1126                 }
 1127         }
 1128         if (callcnt == 0) {
 1129                 MALLOC(other_lop, struct nfscllock *,
 1130                     sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
 1131                 *other_lop = *nlop;
 1132         }
 1133         nfscl_filllockowner(id, own, flags);
 1134         dp = NULL;
 1135         NFSLOCKCLSTATE();
 1136         if (callcnt == 0)
 1137                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
 1138                     np->n_fhp->nfh_len);
 1139 
 1140         /*
 1141          * First, unlock any local regions on a delegation.
 1142          */
 1143         if (dp != NULL) {
 1144                 /* Look for this lockowner. */
 1145                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 1146                         if (!NFSBCMP(lp->nfsl_owner, own,
 1147                             NFSV4CL_LOCKNAMELEN))
 1148                                 break;
 1149                 }
 1150                 if (lp != NULL)
 1151                         /* Use other_lop, so nlop is still available */
 1152                         (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
 1153         }
 1154 
 1155         /*
 1156          * Now, find a matching open/lockowner that hasn't already been done,
 1157          * as marked by nfsl_inprog.
 1158          */
 1159         lp = NULL;
 1160         fnd = 0;
 1161         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 1162             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 1163                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
 1164                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
 1165                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 1166                         if (lp->nfsl_inprog == NULL &&
 1167                             !NFSBCMP(lp->nfsl_owner, own,
 1168                              NFSV4CL_LOCKNAMELEN)) {
 1169                                 fnd = 1;
 1170                                 break;
 1171                         }
 1172                     }
 1173                     if (fnd)
 1174                         break;
 1175                 }
 1176             }
 1177             if (fnd)
 1178                 break;
 1179         }
 1180 
 1181         if (lp != NULL) {
 1182                 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
 1183                 if (ret)
 1184                         *dorpcp = 1;
 1185                 /*
 1186                  * Serial modifications on the lock owner for multiple
 1187                  * threads for the same process using a read/write lock.
 1188                  */
 1189                 lp->nfsl_inprog = p;
 1190                 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
 1191                 *lpp = lp;
 1192         }
 1193         NFSUNLOCKCLSTATE();
 1194         if (nlop)
 1195                 FREE((caddr_t)nlop, M_NFSCLLOCK);
 1196         if (other_lop)
 1197                 FREE((caddr_t)other_lop, M_NFSCLLOCK);
 1198         return (0);
 1199 }
 1200 
 1201 /*
 1202  * Release all lockowners marked in progess for this process and file.
 1203  */
 1204 APPLESTATIC void
 1205 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
 1206     void *id, int flags)
 1207 {
 1208         struct nfsclowner *owp;
 1209         struct nfsclopen *op;
 1210         struct nfscllockowner *lp;
 1211         struct nfsnode *np;
 1212         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 1213 
 1214         np = VTONFS(vp);
 1215         nfscl_filllockowner(id, own, flags);
 1216         NFSLOCKCLSTATE();
 1217         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 1218             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 1219                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
 1220                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
 1221                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 1222                         if (lp->nfsl_inprog == p &&
 1223                             !NFSBCMP(lp->nfsl_owner, own,
 1224                             NFSV4CL_LOCKNAMELEN)) {
 1225                             lp->nfsl_inprog = NULL;
 1226                             nfscl_lockunlock(&lp->nfsl_rwlock);
 1227                         }
 1228                     }
 1229                 }
 1230             }
 1231         }
 1232         nfscl_clrelease(clp);
 1233         NFSUNLOCKCLSTATE();
 1234 }
 1235 
 1236 /*
 1237  * Called to find out if any bytes within the byte range specified are
 1238  * write locked by the calling process. Used to determine if flushing
 1239  * is required before a LockU.
 1240  * If in doubt, return 1, so the flush will occur.
 1241  */
 1242 APPLESTATIC int
 1243 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
 1244     struct ucred *cred, NFSPROC_T *p, void *id, int flags)
 1245 {
 1246         struct nfsclowner *owp;
 1247         struct nfscllockowner *lp;
 1248         struct nfsclopen *op;
 1249         struct nfsclclient *clp;
 1250         struct nfscllock *lop;
 1251         struct nfscldeleg *dp;
 1252         struct nfsnode *np;
 1253         u_int64_t off, end;
 1254         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 1255         int error = 0;
 1256 
 1257         np = VTONFS(vp);
 1258         switch (fl->l_whence) {
 1259         case SEEK_SET:
 1260         case SEEK_CUR:
 1261                 /*
 1262                  * Caller is responsible for adding any necessary offset
 1263                  * when SEEK_CUR is used.
 1264                  */
 1265                 off = fl->l_start;
 1266                 break;
 1267         case SEEK_END:
 1268                 off = np->n_size + fl->l_start;
 1269                 break;
 1270         default:
 1271                 return (1);
 1272         };
 1273         if (fl->l_len != 0) {
 1274                 end = off + fl->l_len;
 1275                 if (end < off)
 1276                         return (1);
 1277         } else {
 1278                 end = NFS64BITSSET;
 1279         }
 1280 
 1281         error = nfscl_getcl(vp, cred, p, &clp);
 1282         if (error)
 1283                 return (1);
 1284         nfscl_filllockowner(id, own, flags);
 1285         NFSLOCKCLSTATE();
 1286 
 1287         /*
 1288          * First check the delegation locks.
 1289          */
 1290         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 1291         if (dp != NULL) {
 1292                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 1293                         if (!NFSBCMP(lp->nfsl_owner, own,
 1294                             NFSV4CL_LOCKNAMELEN))
 1295                                 break;
 1296                 }
 1297                 if (lp != NULL) {
 1298                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
 1299                                 if (lop->nfslo_first >= end)
 1300                                         break;
 1301                                 if (lop->nfslo_end <= off)
 1302                                         continue;
 1303                                 if (lop->nfslo_type == F_WRLCK) {
 1304                                         nfscl_clrelease(clp);
 1305                                         NFSUNLOCKCLSTATE();
 1306                                         return (1);
 1307                                 }
 1308                         }
 1309                 }
 1310         }
 1311 
 1312         /*
 1313          * Now, check state against the server.
 1314          */
 1315         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 1316             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 1317                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
 1318                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
 1319                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 1320                         if (!NFSBCMP(lp->nfsl_owner, own,
 1321                             NFSV4CL_LOCKNAMELEN))
 1322                             break;
 1323                     }
 1324                     if (lp != NULL) {
 1325                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
 1326                             if (lop->nfslo_first >= end)
 1327                                 break;
 1328                             if (lop->nfslo_end <= off)
 1329                                 continue;
 1330                             if (lop->nfslo_type == F_WRLCK) {
 1331                                 nfscl_clrelease(clp);
 1332                                 NFSUNLOCKCLSTATE();
 1333                                 return (1);
 1334                             }
 1335                         }
 1336                     }
 1337                 }
 1338             }
 1339         }
 1340         nfscl_clrelease(clp);
 1341         NFSUNLOCKCLSTATE();
 1342         return (0);
 1343 }
 1344 
 1345 /*
 1346  * Release a byte range lock owner structure.
 1347  */
 1348 APPLESTATIC void
 1349 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
 1350 {
 1351         struct nfsclclient *clp;
 1352 
 1353         if (lp == NULL)
 1354                 return;
 1355         NFSLOCKCLSTATE();
 1356         clp = lp->nfsl_open->nfso_own->nfsow_clp;
 1357         if (error != 0 && candelete &&
 1358             (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
 1359                 nfscl_freelockowner(lp, 0);
 1360         else
 1361                 nfscl_lockunlock(&lp->nfsl_rwlock);
 1362         nfscl_clrelease(clp);
 1363         NFSUNLOCKCLSTATE();
 1364 }
 1365 
 1366 /*
 1367  * Free up an open structure and any associated byte range lock structures.
 1368  */
 1369 APPLESTATIC void
 1370 nfscl_freeopen(struct nfsclopen *op, int local)
 1371 {
 1372 
 1373         LIST_REMOVE(op, nfso_list);
 1374         nfscl_freealllocks(&op->nfso_lock, local);
 1375         FREE((caddr_t)op, M_NFSCLOPEN);
 1376         if (local)
 1377                 newnfsstats.cllocalopens--;
 1378         else
 1379                 newnfsstats.clopens--;
 1380 }
 1381 
 1382 /*
 1383  * Free up all lock owners and associated locks.
 1384  */
 1385 static void
 1386 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
 1387 {
 1388         struct nfscllockowner *lp, *nlp;
 1389 
 1390         LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
 1391                 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
 1392                         panic("nfscllckw");
 1393                 nfscl_freelockowner(lp, local);
 1394         }
 1395 }
 1396 
 1397 /*
 1398  * Called for an Open when NFSERR_EXPIRED is received from the server.
 1399  * If there are no byte range locks nor a Share Deny lost, try to do a
 1400  * fresh Open. Otherwise, free the open.
 1401  */
 1402 static int
 1403 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
 1404     struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
 1405 {
 1406         struct nfscllockowner *lp;
 1407         struct nfscldeleg *dp;
 1408         int mustdelete = 0, error;
 1409 
 1410         /*
 1411          * Look for any byte range lock(s).
 1412          */
 1413         LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 1414                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
 1415                         mustdelete = 1;
 1416                         break;
 1417                 }
 1418         }
 1419 
 1420         /*
 1421          * If no byte range lock(s) nor a Share deny, try to re-open.
 1422          */
 1423         if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
 1424                 newnfs_copycred(&op->nfso_cred, cred);
 1425                 dp = NULL;
 1426                 error = nfsrpc_reopen(nmp, op->nfso_fh,
 1427                     op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
 1428                 if (error) {
 1429                         mustdelete = 1;
 1430                         if (dp != NULL) {
 1431                                 FREE((caddr_t)dp, M_NFSCLDELEG);
 1432                                 dp = NULL;
 1433                         }
 1434                 }
 1435                 if (dp != NULL)
 1436                         nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
 1437                             op->nfso_fhlen, cred, p, &dp);
 1438         }
 1439 
 1440         /*
 1441          * If a byte range lock or Share deny or couldn't re-open, free it.
 1442          */
 1443         if (mustdelete)
 1444                 nfscl_freeopen(op, 0);
 1445         return (mustdelete);
 1446 }
 1447 
 1448 /*
 1449  * Free up an open owner structure.
 1450  */
 1451 static void
 1452 nfscl_freeopenowner(struct nfsclowner *owp, int local)
 1453 {
 1454 
 1455         LIST_REMOVE(owp, nfsow_list);
 1456         FREE((caddr_t)owp, M_NFSCLOWNER);
 1457         if (local)
 1458                 newnfsstats.cllocalopenowners--;
 1459         else
 1460                 newnfsstats.clopenowners--;
 1461 }
 1462 
 1463 /*
 1464  * Free up a byte range lock owner structure.
 1465  */
 1466 APPLESTATIC void
 1467 nfscl_freelockowner(struct nfscllockowner *lp, int local)
 1468 {
 1469         struct nfscllock *lop, *nlop;
 1470 
 1471         LIST_REMOVE(lp, nfsl_list);
 1472         LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
 1473                 nfscl_freelock(lop, local);
 1474         }
 1475         FREE((caddr_t)lp, M_NFSCLLOCKOWNER);
 1476         if (local)
 1477                 newnfsstats.cllocallockowners--;
 1478         else
 1479                 newnfsstats.cllockowners--;
 1480 }
 1481 
 1482 /*
 1483  * Free up a byte range lock structure.
 1484  */
 1485 APPLESTATIC void
 1486 nfscl_freelock(struct nfscllock *lop, int local)
 1487 {
 1488 
 1489         LIST_REMOVE(lop, nfslo_list);
 1490         FREE((caddr_t)lop, M_NFSCLLOCK);
 1491         if (local)
 1492                 newnfsstats.cllocallocks--;
 1493         else
 1494                 newnfsstats.cllocks--;
 1495 }
 1496 
 1497 /*
 1498  * Clean out the state related to a delegation.
 1499  */
 1500 static void
 1501 nfscl_cleandeleg(struct nfscldeleg *dp)
 1502 {
 1503         struct nfsclowner *owp, *nowp;
 1504         struct nfsclopen *op;
 1505 
 1506         LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
 1507                 op = LIST_FIRST(&owp->nfsow_open);
 1508                 if (op != NULL) {
 1509                         if (LIST_NEXT(op, nfso_list) != NULL)
 1510                                 panic("nfscleandel");
 1511                         nfscl_freeopen(op, 1);
 1512                 }
 1513                 nfscl_freeopenowner(owp, 1);
 1514         }
 1515         nfscl_freealllocks(&dp->nfsdl_lock, 1);
 1516 }
 1517 
 1518 /*
 1519  * Free a delegation.
 1520  */
 1521 static void
 1522 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp)
 1523 {
 1524 
 1525         TAILQ_REMOVE(hdp, dp, nfsdl_list);
 1526         LIST_REMOVE(dp, nfsdl_hash);
 1527         FREE((caddr_t)dp, M_NFSCLDELEG);
 1528         newnfsstats.cldelegates--;
 1529         nfscl_delegcnt--;
 1530 }
 1531 
 1532 /*
 1533  * Free up all state related to this client structure.
 1534  */
 1535 static void
 1536 nfscl_cleanclient(struct nfsclclient *clp)
 1537 {
 1538         struct nfsclowner *owp, *nowp;
 1539         struct nfsclopen *op, *nop;
 1540         struct nfscllockowner *lp, *nlp;
 1541 
 1542 
 1543         /* get rid of defunct lockowners */
 1544         LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) {
 1545                 nfscl_freelockowner(lp, 0);
 1546         }
 1547 
 1548         /* Now, all the OpenOwners, etc. */
 1549         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
 1550                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
 1551                         nfscl_freeopen(op, 0);
 1552                 }
 1553                 nfscl_freeopenowner(owp, 0);
 1554         }
 1555 }
 1556 
 1557 /*
 1558  * Called when an NFSERR_EXPIRED is received from the server.
 1559  */
 1560 static void
 1561 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
 1562     struct ucred *cred, NFSPROC_T *p)
 1563 {
 1564         struct nfsclowner *owp, *nowp, *towp;
 1565         struct nfsclopen *op, *nop, *top;
 1566         struct nfscldeleg *dp, *ndp;
 1567         int ret, printed = 0;
 1568 
 1569         /*
 1570          * First, merge locally issued Opens into the list for the server.
 1571          */
 1572         dp = TAILQ_FIRST(&clp->nfsc_deleg);
 1573         while (dp != NULL) {
 1574             ndp = TAILQ_NEXT(dp, nfsdl_list);
 1575             owp = LIST_FIRST(&dp->nfsdl_owner);
 1576             while (owp != NULL) {
 1577                 nowp = LIST_NEXT(owp, nfsow_list);
 1578                 op = LIST_FIRST(&owp->nfsow_open);
 1579                 if (op != NULL) {
 1580                     if (LIST_NEXT(op, nfso_list) != NULL)
 1581                         panic("nfsclexp");
 1582                     LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
 1583                         if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
 1584                             NFSV4CL_LOCKNAMELEN))
 1585                             break;
 1586                     }
 1587                     if (towp != NULL) {
 1588                         /* Merge opens in */
 1589                         LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
 1590                             if (top->nfso_fhlen == op->nfso_fhlen &&
 1591                                 !NFSBCMP(top->nfso_fh, op->nfso_fh,
 1592                                  op->nfso_fhlen)) {
 1593                                 top->nfso_mode |= op->nfso_mode;
 1594                                 top->nfso_opencnt += op->nfso_opencnt;
 1595                                 break;
 1596                             }
 1597                         }
 1598                         if (top == NULL) {
 1599                             /* Just add the open to the owner list */
 1600                             LIST_REMOVE(op, nfso_list);
 1601                             op->nfso_own = towp;
 1602                             LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
 1603                             newnfsstats.cllocalopens--;
 1604                             newnfsstats.clopens++;
 1605                         }
 1606                     } else {
 1607                         /* Just add the openowner to the client list */
 1608                         LIST_REMOVE(owp, nfsow_list);
 1609                         owp->nfsow_clp = clp;
 1610                         LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
 1611                         newnfsstats.cllocalopenowners--;
 1612                         newnfsstats.clopenowners++;
 1613                         newnfsstats.cllocalopens--;
 1614                         newnfsstats.clopens++;
 1615                     }
 1616                 }
 1617                 owp = nowp;
 1618             }
 1619             if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
 1620                 printed = 1;
 1621                 printf("nfsv4 expired locks lost\n");
 1622             }
 1623             nfscl_cleandeleg(dp);
 1624             nfscl_freedeleg(&clp->nfsc_deleg, dp);
 1625             dp = ndp;
 1626         }
 1627         if (!TAILQ_EMPTY(&clp->nfsc_deleg))
 1628             panic("nfsclexp");
 1629 
 1630         /*
 1631          * Now, try and reopen against the server.
 1632          */
 1633         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
 1634                 owp->nfsow_seqid = 0;
 1635                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
 1636                         ret = nfscl_expireopen(clp, op, nmp, cred, p);
 1637                         if (ret && !printed) {
 1638                                 printed = 1;
 1639                                 printf("nfsv4 expired locks lost\n");
 1640                         }
 1641                 }
 1642                 if (LIST_EMPTY(&owp->nfsow_open))
 1643                         nfscl_freeopenowner(owp, 0);
 1644         }
 1645 }
 1646 
 1647 #ifndef __FreeBSD__
 1648 /*
 1649  * Called from exit() upon process termination.
 1650  */
 1651 APPLESTATIC void
 1652 nfscl_cleanup(NFSPROC_T *p)
 1653 {
 1654         struct nfsclclient *clp;
 1655         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 1656 
 1657         if (!nfscl_inited)
 1658                 return;
 1659         nfscl_filllockowner(p->td_proc, own, F_POSIX);
 1660 
 1661         NFSLOCKCLSTATE();
 1662         /*
 1663          * Loop through all the clientids, looking for the OpenOwners.
 1664          */
 1665         LIST_FOREACH(clp, &nfsclhead, nfsc_list)
 1666                 nfscl_cleanup_common(clp, own);
 1667         NFSUNLOCKCLSTATE();
 1668 }
 1669 #endif  /* !__FreeBSD__ */
 1670 
 1671 /*
 1672  * Common code used by nfscl_cleanup() and nfscl_cleanupkext().
 1673  * Must be called with CLSTATE lock held.
 1674  */
 1675 static void
 1676 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
 1677 {
 1678         struct nfsclowner *owp, *nowp;
 1679         struct nfsclopen *op;
 1680         struct nfscllockowner *lp, *nlp;
 1681         struct nfscldeleg *dp;
 1682 
 1683         /* First, get rid of local locks on delegations. */
 1684         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
 1685                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
 1686                     if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
 1687                         if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
 1688                             panic("nfscllckw");
 1689                         nfscl_freelockowner(lp, 1);
 1690                     }
 1691                 }
 1692         }
 1693         owp = LIST_FIRST(&clp->nfsc_owner);
 1694         while (owp != NULL) {
 1695                 nowp = LIST_NEXT(owp, nfsow_list);
 1696                 if (!NFSBCMP(owp->nfsow_owner, own,
 1697                     NFSV4CL_LOCKNAMELEN)) {
 1698                         /*
 1699                          * If there are children that haven't closed the
 1700                          * file descriptors yet, the opens will still be
 1701                          * here. For that case, let the renew thread clear
 1702                          * out the OpenOwner later.
 1703                          */
 1704                         if (LIST_EMPTY(&owp->nfsow_open))
 1705                                 nfscl_freeopenowner(owp, 0);
 1706                         else
 1707                                 owp->nfsow_defunct = 1;
 1708                 } else {
 1709                         /* look for lockowners on other opens */
 1710                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 1711                                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 1712                                         if (!NFSBCMP(lp->nfsl_owner, own,
 1713                                             NFSV4CL_LOCKNAMELEN))
 1714                                                 lp->nfsl_defunct = 1;
 1715                                 }
 1716                         }
 1717                 }
 1718                 owp = nowp;
 1719         }
 1720 
 1721         /* and check the defunct list */
 1722         LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) {
 1723                 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN))
 1724                     lp->nfsl_defunct = 1;
 1725         }
 1726 }
 1727 
 1728 #if defined(APPLEKEXT) || defined(__FreeBSD__)
 1729 /*
 1730  * Simulate the call nfscl_cleanup() by looking for open owners associated
 1731  * with processes that no longer exist, since a call to nfscl_cleanup()
 1732  * can't be patched into exit().
 1733  */
 1734 static void
 1735 nfscl_cleanupkext(struct nfsclclient *clp)
 1736 {
 1737         struct nfsclowner *owp, *nowp;
 1738         struct nfscllockowner *lp;
 1739 
 1740         NFSPROCLISTLOCK();
 1741         NFSLOCKCLSTATE();
 1742         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
 1743                 if (nfscl_procdoesntexist(owp->nfsow_owner))
 1744                         nfscl_cleanup_common(clp, owp->nfsow_owner);
 1745         }
 1746 
 1747         /* and check the defunct list */
 1748         LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) {
 1749                 if (nfscl_procdoesntexist(lp->nfsl_owner))
 1750                         lp->nfsl_defunct = 1;
 1751         }
 1752         NFSUNLOCKCLSTATE();
 1753         NFSPROCLISTUNLOCK();
 1754 }
 1755 #endif  /* APPLEKEXT || __FreeBSD__ */
 1756 
 1757 static int      fake_global;    /* Used to force visibility of MNTK_UNMOUNTF */
 1758 /*
 1759  * Called from nfs umount to free up the clientid.
 1760  */
 1761 APPLESTATIC void
 1762 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
 1763 {
 1764         struct nfsclclient *clp;
 1765         struct ucred *cred;
 1766         int igotlock;
 1767 
 1768         /*
 1769          * For the case that matters, this is the thread that set
 1770          * MNTK_UNMOUNTF, so it will see it set. The code that follows is
 1771          * done to ensure that any thread executing nfscl_getcl() after
 1772          * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
 1773          * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
 1774          * explanation, courtesy of Alan Cox.
 1775          * What follows is a snippet from Alan Cox's email at:
 1776          * http://docs.FreeBSD.org/cgi/
 1777          *     mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
 1778          * 
 1779          * 1. Set MNTK_UNMOUNTF
 1780          * 2. Acquire a standard FreeBSD mutex "m".
 1781          * 3. Update some data structures.
 1782          * 4. Release mutex "m".
 1783          * 
 1784          * Then, other threads that acquire "m" after step 4 has occurred will
 1785          * see MNTK_UNMOUNTF as set.  But, other threads that beat thread X to
 1786          * step 2 may or may not see MNTK_UNMOUNTF as set.
 1787          */
 1788         NFSLOCKCLSTATE();
 1789         if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
 1790                 fake_global++;
 1791                 NFSUNLOCKCLSTATE();
 1792                 NFSLOCKCLSTATE();
 1793         }
 1794 
 1795         clp = nmp->nm_clp;
 1796         if (clp != NULL) {
 1797                 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
 1798                         panic("nfscl umount");
 1799         
 1800                 /*
 1801                  * First, handshake with the nfscl renew thread, to terminate
 1802                  * it.
 1803                  */
 1804                 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
 1805                 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
 1806                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
 1807                             "nfsclumnt", hz);
 1808         
 1809                 /*
 1810                  * Now, get the exclusive lock on the client state, so
 1811                  * that no uses of the state are still in progress.
 1812                  */
 1813                 do {
 1814                         igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
 1815                             NFSCLSTATEMUTEXPTR, NULL);
 1816                 } while (!igotlock);
 1817                 NFSUNLOCKCLSTATE();
 1818         
 1819                 /*
 1820                  * Free up all the state. It will expire on the server, but
 1821                  * maybe we should do a SetClientId/SetClientIdConfirm so
 1822                  * the server throws it away?
 1823                  */
 1824                 LIST_REMOVE(clp, nfsc_list);
 1825                 nfscl_delegreturnall(clp, p);
 1826                 cred = newnfs_getcred();
 1827                 (void) nfsrpc_setclient(nmp, clp, cred, p);
 1828                 nfscl_cleanclient(clp);
 1829                 nmp->nm_clp = NULL;
 1830                 NFSFREECRED(cred);
 1831                 FREE((caddr_t)clp, M_NFSCLCLIENT);
 1832         } else
 1833                 NFSUNLOCKCLSTATE();
 1834 }
 1835 
 1836 /*
 1837  * This function is called when a server replies with NFSERR_STALECLIENTID
 1838  * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens
 1839  * and Locks with reclaim. If these fail, it deletes the corresponding state.
 1840  */
 1841 static void
 1842 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
 1843 {
 1844         struct nfsclowner *owp, *nowp;
 1845         struct nfsclopen *op, *nop;
 1846         struct nfscllockowner *lp, *nlp;
 1847         struct nfscllock *lop, *nlop;
 1848         struct nfscldeleg *dp, *ndp, *tdp;
 1849         struct nfsmount *nmp;
 1850         struct ucred *tcred;
 1851         struct nfsclopenhead extra_open;
 1852         struct nfscldeleghead extra_deleg;
 1853         struct nfsreq *rep;
 1854         u_int64_t len;
 1855         u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
 1856         int igotlock = 0, error, trycnt, firstlock, s;
 1857 
 1858         /*
 1859          * First, lock the client structure, so everyone else will
 1860          * block when trying to use state.
 1861          */
 1862         NFSLOCKCLSTATE();
 1863         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
 1864         do {
 1865                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
 1866                     NFSCLSTATEMUTEXPTR, NULL);
 1867         } while (!igotlock);
 1868         NFSUNLOCKCLSTATE();
 1869 
 1870         nmp = clp->nfsc_nmp;
 1871         if (nmp == NULL)
 1872                 panic("nfscl recover");
 1873         trycnt = 5;
 1874         do {
 1875                 error = nfsrpc_setclient(nmp, clp, cred, p);
 1876         } while ((error == NFSERR_STALECLIENTID ||
 1877              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
 1878         if (error) {
 1879                 nfscl_cleanclient(clp);
 1880                 NFSLOCKCLSTATE();
 1881                 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
 1882                     NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG);
 1883                 wakeup(&clp->nfsc_flags);
 1884                 nfsv4_unlock(&clp->nfsc_lock, 0);
 1885                 NFSUNLOCKCLSTATE();
 1886                 return;
 1887         }
 1888         clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
 1889         clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
 1890 
 1891         /*
 1892          * Mark requests already queued on the server, so that they don't
 1893          * initiate another recovery cycle. Any requests already in the
 1894          * queue that handle state information will have the old stale
 1895          * clientid/stateid and will get a NFSERR_STALESTATEID or
 1896          * NFSERR_STALECLIENTID reply from the server. This will be
 1897          * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set.
 1898          */
 1899         s = splsoftclock();
 1900         NFSLOCKREQ();
 1901         TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
 1902                 if (rep->r_nmp == nmp)
 1903                         rep->r_flags |= R_DONTRECOVER;
 1904         }
 1905         NFSUNLOCKREQ();
 1906         splx(s);
 1907 
 1908         /* get rid of defunct lockowners */
 1909         LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) {
 1910                 nfscl_freelockowner(lp, 0);
 1911         }
 1912 
 1913         /*
 1914          * Now, mark all delegations "need reclaim".
 1915          */
 1916         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
 1917                 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
 1918 
 1919         TAILQ_INIT(&extra_deleg);
 1920         LIST_INIT(&extra_open);
 1921         /*
 1922          * Now traverse the state lists, doing Open and Lock Reclaims.
 1923          */
 1924         tcred = newnfs_getcred();
 1925         owp = LIST_FIRST(&clp->nfsc_owner);
 1926         while (owp != NULL) {
 1927             nowp = LIST_NEXT(owp, nfsow_list);
 1928             owp->nfsow_seqid = 0;
 1929             op = LIST_FIRST(&owp->nfsow_open);
 1930             while (op != NULL) {
 1931                 nop = LIST_NEXT(op, nfso_list);
 1932                 if (error != NFSERR_NOGRACE) {
 1933                     /* Search for a delegation to reclaim with the open */
 1934                     TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
 1935                         if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
 1936                             continue;
 1937                         if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
 1938                             mode = NFSV4OPEN_ACCESSWRITE;
 1939                             delegtype = NFSV4OPEN_DELEGATEWRITE;
 1940                         } else {
 1941                             mode = NFSV4OPEN_ACCESSREAD;
 1942                             delegtype = NFSV4OPEN_DELEGATEREAD;
 1943                         }
 1944                         if ((op->nfso_mode & mode) == mode &&
 1945                             op->nfso_fhlen == dp->nfsdl_fhlen &&
 1946                             !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
 1947                             break;
 1948                     }
 1949                     ndp = dp;
 1950                     if (dp == NULL)
 1951                         delegtype = NFSV4OPEN_DELEGATENONE;
 1952                     newnfs_copycred(&op->nfso_cred, tcred);
 1953                     error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
 1954                         op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
 1955                         op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
 1956                         tcred, p);
 1957                     if (!error) {
 1958                         /* Handle any replied delegation */
 1959                         if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
 1960                             || NFSMNT_RDONLY(nmp->nm_mountp))) {
 1961                             if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
 1962                                 mode = NFSV4OPEN_ACCESSWRITE;
 1963                             else
 1964                                 mode = NFSV4OPEN_ACCESSREAD;
 1965                             TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
 1966                                 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
 1967                                     continue;
 1968                                 if ((op->nfso_mode & mode) == mode &&
 1969                                     op->nfso_fhlen == dp->nfsdl_fhlen &&
 1970                                     !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
 1971                                     op->nfso_fhlen)) {
 1972                                     dp->nfsdl_stateid = ndp->nfsdl_stateid;
 1973                                     dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
 1974                                     dp->nfsdl_ace = ndp->nfsdl_ace;
 1975                                     dp->nfsdl_change = ndp->nfsdl_change;
 1976                                     dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
 1977                                     if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
 1978                                         dp->nfsdl_flags |= NFSCLDL_RECALL;
 1979                                     FREE((caddr_t)ndp, M_NFSCLDELEG);
 1980                                     ndp = NULL;
 1981                                     break;
 1982                                 }
 1983                             }
 1984                         }
 1985                         if (ndp != NULL)
 1986                             TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
 1987 
 1988                         /* and reclaim all byte range locks */
 1989                         lp = LIST_FIRST(&op->nfso_lock);
 1990                         while (lp != NULL) {
 1991                             nlp = LIST_NEXT(lp, nfsl_list);
 1992                             lp->nfsl_seqid = 0;
 1993                             firstlock = 1;
 1994                             lop = LIST_FIRST(&lp->nfsl_lock);
 1995                             while (lop != NULL) {
 1996                                 nlop = LIST_NEXT(lop, nfslo_list);
 1997                                 if (lop->nfslo_end == NFS64BITSSET)
 1998                                     len = NFS64BITSSET;
 1999                                 else
 2000                                     len = lop->nfslo_end - lop->nfslo_first;
 2001                                 if (error != NFSERR_NOGRACE)
 2002                                     error = nfscl_trylock(nmp, NULL,
 2003                                         op->nfso_fh, op->nfso_fhlen, lp,
 2004                                         firstlock, 1, lop->nfslo_first, len,
 2005                                         lop->nfslo_type, tcred, p);
 2006                                 if (error != 0)
 2007                                     nfscl_freelock(lop, 0);
 2008                                 else
 2009                                     firstlock = 0;
 2010                                 lop = nlop;
 2011                             }
 2012                             /* If no locks, but a lockowner, just delete it. */
 2013                             if (LIST_EMPTY(&lp->nfsl_lock))
 2014                                 nfscl_freelockowner(lp, 0);
 2015                             lp = nlp;
 2016                         }
 2017                     } else {
 2018                         nfscl_freeopen(op, 0);
 2019                     }
 2020                 }
 2021                 op = nop;
 2022             }
 2023             owp = nowp;
 2024         }
 2025 
 2026         /*
 2027          * Now, try and get any delegations not yet reclaimed by cobbling
 2028          * to-gether an appropriate open.
 2029          */
 2030         nowp = NULL;
 2031         dp = TAILQ_FIRST(&clp->nfsc_deleg);
 2032         while (dp != NULL) {
 2033             ndp = TAILQ_NEXT(dp, nfsdl_list);
 2034             if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
 2035                 if (nowp == NULL) {
 2036                     MALLOC(nowp, struct nfsclowner *,
 2037                         sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
 2038                     /*
 2039                      * Name must be as long an largest possible
 2040                      * NFSV4CL_LOCKNAMELEN. 12 for now.
 2041                      */
 2042                     NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
 2043                         NFSV4CL_LOCKNAMELEN);
 2044                     LIST_INIT(&nowp->nfsow_open);
 2045                     nowp->nfsow_clp = clp;
 2046                     nowp->nfsow_seqid = 0;
 2047                     nowp->nfsow_defunct = 0;
 2048                     nfscl_lockinit(&nowp->nfsow_rwlock);
 2049                 }
 2050                 nop = NULL;
 2051                 if (error != NFSERR_NOGRACE) {
 2052                     MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
 2053                         dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
 2054                     nop->nfso_own = nowp;
 2055                     if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
 2056                         nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
 2057                         delegtype = NFSV4OPEN_DELEGATEWRITE;
 2058                     } else {
 2059                         nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
 2060                         delegtype = NFSV4OPEN_DELEGATEREAD;
 2061                     }
 2062                     nop->nfso_opencnt = 0;
 2063                     nop->nfso_posixlock = 1;
 2064                     nop->nfso_fhlen = dp->nfsdl_fhlen;
 2065                     NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
 2066                     LIST_INIT(&nop->nfso_lock);
 2067                     nop->nfso_stateid.seqid = 0;
 2068                     nop->nfso_stateid.other[0] = 0;
 2069                     nop->nfso_stateid.other[1] = 0;
 2070                     nop->nfso_stateid.other[2] = 0;
 2071                     newnfs_copycred(&dp->nfsdl_cred, tcred);
 2072                     newnfs_copyincred(tcred, &nop->nfso_cred);
 2073                     tdp = NULL;
 2074                     error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
 2075                         nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
 2076                         nop->nfso_mode, nop, NULL, 0, &tdp, 1,
 2077                         delegtype, tcred, p);
 2078                     if (tdp != NULL) {
 2079                         if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
 2080                             mode = NFSV4OPEN_ACCESSWRITE;
 2081                         else
 2082                             mode = NFSV4OPEN_ACCESSREAD;
 2083                         if ((nop->nfso_mode & mode) == mode &&
 2084                             nop->nfso_fhlen == tdp->nfsdl_fhlen &&
 2085                             !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
 2086                             nop->nfso_fhlen)) {
 2087                             dp->nfsdl_stateid = tdp->nfsdl_stateid;
 2088                             dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
 2089                             dp->nfsdl_ace = tdp->nfsdl_ace;
 2090                             dp->nfsdl_change = tdp->nfsdl_change;
 2091                             dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
 2092                             if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
 2093                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
 2094                             FREE((caddr_t)tdp, M_NFSCLDELEG);
 2095                         } else {
 2096                             TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
 2097                         }
 2098                     }
 2099                 }
 2100                 if (error) {
 2101                     if (nop != NULL)
 2102                         FREE((caddr_t)nop, M_NFSCLOPEN);
 2103                     /*
 2104                      * Couldn't reclaim it, so throw the state
 2105                      * away. Ouch!!
 2106                      */
 2107                     nfscl_cleandeleg(dp);
 2108                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
 2109                 } else {
 2110                     LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
 2111                 }
 2112             }
 2113             dp = ndp;
 2114         }
 2115 
 2116         /*
 2117          * Now, get rid of extra Opens and Delegations.
 2118          */
 2119         LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
 2120                 do {
 2121                         newnfs_copycred(&op->nfso_cred, tcred);
 2122                         error = nfscl_tryclose(op, tcred, nmp, p);
 2123                         if (error == NFSERR_GRACE)
 2124                                 (void) nfs_catnap(PZERO, error, "nfsexcls");
 2125                 } while (error == NFSERR_GRACE);
 2126                 LIST_REMOVE(op, nfso_list);
 2127                 FREE((caddr_t)op, M_NFSCLOPEN);
 2128         }
 2129         if (nowp != NULL)
 2130                 FREE((caddr_t)nowp, M_NFSCLOWNER);
 2131 
 2132         TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
 2133                 do {
 2134                         newnfs_copycred(&dp->nfsdl_cred, tcred);
 2135                         error = nfscl_trydelegreturn(dp, tcred, nmp, p);
 2136                         if (error == NFSERR_GRACE)
 2137                                 (void) nfs_catnap(PZERO, error, "nfsexdlg");
 2138                 } while (error == NFSERR_GRACE);
 2139                 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
 2140                 FREE((caddr_t)dp, M_NFSCLDELEG);
 2141         }
 2142 
 2143         NFSLOCKCLSTATE();
 2144         clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
 2145         wakeup(&clp->nfsc_flags);
 2146         nfsv4_unlock(&clp->nfsc_lock, 0);
 2147         NFSUNLOCKCLSTATE();
 2148         NFSFREECRED(tcred);
 2149 }
 2150 
 2151 /*
 2152  * This function is called when a server replies with NFSERR_EXPIRED.
 2153  * It deletes all state for the client and does a fresh SetClientId/confirm.
 2154  * XXX Someday it should post a signal to the process(es) that hold the
 2155  * state, so they know that lock state has been lost.
 2156  */
 2157 APPLESTATIC int
 2158 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
 2159 {
 2160         struct nfscllockowner *lp, *nlp;
 2161         struct nfsmount *nmp;
 2162         struct ucred *cred;
 2163         int igotlock = 0, error, trycnt;
 2164 
 2165         /*
 2166          * If the clientid has gone away or a new SetClientid has already
 2167          * been done, just return ok.
 2168          */
 2169         if (clp == NULL || clidrev != clp->nfsc_clientidrev)
 2170                 return (0);
 2171 
 2172         /*
 2173          * First, lock the client structure, so everyone else will
 2174          * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
 2175          * that only one thread does the work.
 2176          */
 2177         NFSLOCKCLSTATE();
 2178         clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
 2179         do {
 2180                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
 2181                     NFSCLSTATEMUTEXPTR, NULL);
 2182         } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
 2183         if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
 2184                 if (igotlock)
 2185                         nfsv4_unlock(&clp->nfsc_lock, 0);
 2186                 NFSUNLOCKCLSTATE();
 2187                 return (0);
 2188         }
 2189         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
 2190         NFSUNLOCKCLSTATE();
 2191 
 2192         nmp = clp->nfsc_nmp;
 2193         if (nmp == NULL)
 2194                 panic("nfscl expired");
 2195         cred = newnfs_getcred();
 2196         trycnt = 5;
 2197         do {
 2198                 error = nfsrpc_setclient(nmp, clp, cred, p);
 2199         } while ((error == NFSERR_STALECLIENTID ||
 2200              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
 2201         if (error) {
 2202                 /*
 2203                  * Clear out any state.
 2204                  */
 2205                 nfscl_cleanclient(clp);
 2206                 NFSLOCKCLSTATE();
 2207                 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
 2208                     NFSCLFLAGS_RECOVER);
 2209         } else {
 2210                 /* get rid of defunct lockowners */
 2211                 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list,
 2212                     nlp) {
 2213                         nfscl_freelockowner(lp, 0);
 2214                 }
 2215 
 2216                 /*
 2217                  * Expire the state for the client.
 2218                  */
 2219                 nfscl_expireclient(clp, nmp, cred, p);
 2220                 NFSLOCKCLSTATE();
 2221                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
 2222                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
 2223         }
 2224         clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
 2225         wakeup(&clp->nfsc_flags);
 2226         nfsv4_unlock(&clp->nfsc_lock, 0);
 2227         NFSUNLOCKCLSTATE();
 2228         NFSFREECRED(cred);
 2229         return (error);
 2230 }
 2231 
 2232 /*
 2233  * This function inserts a lock in the list after insert_lop.
 2234  */
 2235 static void
 2236 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
 2237     struct nfscllock *insert_lop, int local)
 2238 {
 2239 
 2240         if ((struct nfscllockowner *)insert_lop == lp)
 2241                 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
 2242         else
 2243                 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
 2244         if (local)
 2245                 newnfsstats.cllocallocks++;
 2246         else
 2247                 newnfsstats.cllocks++;
 2248 }
 2249 
 2250 /*
 2251  * This function updates the locking for a lock owner and given file. It
 2252  * maintains a list of lock ranges ordered on increasing file offset that
 2253  * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
 2254  * It always adds new_lop to the list and sometimes uses the one pointed
 2255  * at by other_lopp.
 2256  * Returns 1 if the locks were modified, 0 otherwise.
 2257  */
 2258 static int
 2259 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
 2260     struct nfscllock **other_lopp, int local)
 2261 {
 2262         struct nfscllock *new_lop = *new_lopp;
 2263         struct nfscllock *lop, *tlop, *ilop;
 2264         struct nfscllock *other_lop;
 2265         int unlock = 0, modified = 0;
 2266         u_int64_t tmp;
 2267 
 2268         /*
 2269          * Work down the list until the lock is merged.
 2270          */
 2271         if (new_lop->nfslo_type == F_UNLCK)
 2272                 unlock = 1;
 2273         ilop = (struct nfscllock *)lp;
 2274         lop = LIST_FIRST(&lp->nfsl_lock);
 2275         while (lop != NULL) {
 2276             /*
 2277              * Only check locks for this file that aren't before the start of
 2278              * new lock's range.
 2279              */
 2280             if (lop->nfslo_end >= new_lop->nfslo_first) {
 2281                 if (new_lop->nfslo_end < lop->nfslo_first) {
 2282                     /*
 2283                      * If the new lock ends before the start of the
 2284                      * current lock's range, no merge, just insert
 2285                      * the new lock.
 2286                      */
 2287                     break;
 2288                 }
 2289                 if (new_lop->nfslo_type == lop->nfslo_type ||
 2290                     (new_lop->nfslo_first <= lop->nfslo_first &&
 2291                      new_lop->nfslo_end >= lop->nfslo_end)) {
 2292                     /*
 2293                      * This lock can be absorbed by the new lock/unlock.
 2294                      * This happens when it covers the entire range
 2295                      * of the old lock or is contiguous
 2296                      * with the old lock and is of the same type or an
 2297                      * unlock.
 2298                      */
 2299                     if (new_lop->nfslo_type != lop->nfslo_type ||
 2300                         new_lop->nfslo_first != lop->nfslo_first ||
 2301                         new_lop->nfslo_end != lop->nfslo_end)
 2302                         modified = 1;
 2303                     if (lop->nfslo_first < new_lop->nfslo_first)
 2304                         new_lop->nfslo_first = lop->nfslo_first;
 2305                     if (lop->nfslo_end > new_lop->nfslo_end)
 2306                         new_lop->nfslo_end = lop->nfslo_end;
 2307                     tlop = lop;
 2308                     lop = LIST_NEXT(lop, nfslo_list);
 2309                     nfscl_freelock(tlop, local);
 2310                     continue;
 2311                 }
 2312 
 2313                 /*
 2314                  * All these cases are for contiguous locks that are not the
 2315                  * same type, so they can't be merged.
 2316                  */
 2317                 if (new_lop->nfslo_first <= lop->nfslo_first) {
 2318                     /*
 2319                      * This case is where the new lock overlaps with the
 2320                      * first part of the old lock. Move the start of the
 2321                      * old lock to just past the end of the new lock. The
 2322                      * new lock will be inserted in front of the old, since
 2323                      * ilop hasn't been updated. (We are done now.)
 2324                      */
 2325                     if (lop->nfslo_first != new_lop->nfslo_end) {
 2326                         lop->nfslo_first = new_lop->nfslo_end;
 2327                         modified = 1;
 2328                     }
 2329                     break;
 2330                 }
 2331                 if (new_lop->nfslo_end >= lop->nfslo_end) {
 2332                     /*
 2333                      * This case is where the new lock overlaps with the
 2334                      * end of the old lock's range. Move the old lock's
 2335                      * end to just before the new lock's first and insert
 2336                      * the new lock after the old lock.
 2337                      * Might not be done yet, since the new lock could
 2338                      * overlap further locks with higher ranges.
 2339                      */
 2340                     if (lop->nfslo_end != new_lop->nfslo_first) {
 2341                         lop->nfslo_end = new_lop->nfslo_first;
 2342                         modified = 1;
 2343                     }
 2344                     ilop = lop;
 2345                     lop = LIST_NEXT(lop, nfslo_list);
 2346                     continue;
 2347                 }
 2348                 /*
 2349                  * The final case is where the new lock's range is in the
 2350                  * middle of the current lock's and splits the current lock
 2351                  * up. Use *other_lopp to handle the second part of the
 2352                  * split old lock range. (We are done now.)
 2353                  * For unlock, we use new_lop as other_lop and tmp, since
 2354                  * other_lop and new_lop are the same for this case.
 2355                  * We noted the unlock case above, so we don't need
 2356                  * new_lop->nfslo_type any longer.
 2357                  */
 2358                 tmp = new_lop->nfslo_first;
 2359                 if (unlock) {
 2360                     other_lop = new_lop;
 2361                     *new_lopp = NULL;
 2362                 } else {
 2363                     other_lop = *other_lopp;
 2364                     *other_lopp = NULL;
 2365                 }
 2366                 other_lop->nfslo_first = new_lop->nfslo_end;
 2367                 other_lop->nfslo_end = lop->nfslo_end;
 2368                 other_lop->nfslo_type = lop->nfslo_type;
 2369                 lop->nfslo_end = tmp;
 2370                 nfscl_insertlock(lp, other_lop, lop, local);
 2371                 ilop = lop;
 2372                 modified = 1;
 2373                 break;
 2374             }
 2375             ilop = lop;
 2376             lop = LIST_NEXT(lop, nfslo_list);
 2377             if (lop == NULL)
 2378                 break;
 2379         }
 2380 
 2381         /*
 2382          * Insert the new lock in the list at the appropriate place.
 2383          */
 2384         if (!unlock) {
 2385                 nfscl_insertlock(lp, new_lop, ilop, local);
 2386                 *new_lopp = NULL;
 2387                 modified = 1;
 2388         }
 2389         return (modified);
 2390 }
 2391 
 2392 /*
 2393  * This function must be run as a kernel thread.
 2394  * It does Renew Ops and recovery, when required.
 2395  */
 2396 APPLESTATIC void
 2397 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
 2398 {
 2399         struct nfsclowner *owp, *nowp;
 2400         struct nfsclopen *op;
 2401         struct nfscllockowner *lp, *nlp, *olp;
 2402         struct nfscldeleghead dh;
 2403         struct nfscllockownerhead lh;
 2404         struct nfscldeleg *dp, *ndp;
 2405         struct ucred *cred;
 2406         u_int32_t clidrev;
 2407         int error, cbpathdown, islept, igotlock, ret, clearok;
 2408         uint32_t recover_done_time = 0;
 2409 
 2410         cred = newnfs_getcred();
 2411         NFSLOCKCLSTATE();
 2412         clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
 2413         NFSUNLOCKCLSTATE();
 2414         for(;;) {
 2415                 newnfs_setroot(cred);
 2416                 cbpathdown = 0;
 2417                 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
 2418                         /*
 2419                          * Only allow one recover within 1/2 of the lease
 2420                          * duration (nfsc_renew).
 2421                          */
 2422                         if (recover_done_time < NFSD_MONOSEC) {
 2423                                 recover_done_time = NFSD_MONOSEC +
 2424                                     clp->nfsc_renew;
 2425                                 nfscl_recover(clp, cred, p);
 2426                         } else {
 2427                                 NFSLOCKCLSTATE();
 2428                                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
 2429                                 NFSUNLOCKCLSTATE();
 2430                         }
 2431                 }
 2432                 if (clp->nfsc_expire <= NFSD_MONOSEC &&
 2433                     (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
 2434                         clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
 2435                         clidrev = clp->nfsc_clientidrev;
 2436                         error = nfsrpc_renew(clp, cred, p);
 2437                         if (error == NFSERR_CBPATHDOWN)
 2438                             cbpathdown = 1;
 2439                         else if (error == NFSERR_STALECLIENTID) {
 2440                             NFSLOCKCLSTATE();
 2441                             clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
 2442                             NFSUNLOCKCLSTATE();
 2443                         } else if (error == NFSERR_EXPIRED)
 2444                             (void) nfscl_hasexpired(clp, clidrev, p);
 2445                 }
 2446 
 2447                 LIST_INIT(&lh);
 2448                 TAILQ_INIT(&dh);
 2449                 NFSLOCKCLSTATE();
 2450                 if (cbpathdown)
 2451                         /* It's a Total Recall! */
 2452                         nfscl_totalrecall(clp);
 2453 
 2454                 /*
 2455                  * Now, handle defunct owners.
 2456                  */
 2457                 owp = LIST_FIRST(&clp->nfsc_owner);
 2458                 while (owp != NULL) {
 2459                     nowp = LIST_NEXT(owp, nfsow_list);
 2460                     if (LIST_EMPTY(&owp->nfsow_open)) {
 2461                         if (owp->nfsow_defunct)
 2462                             nfscl_freeopenowner(owp, 0);
 2463                     } else {
 2464                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2465                             lp = LIST_FIRST(&op->nfso_lock);
 2466                             while (lp != NULL) {
 2467                                 nlp = LIST_NEXT(lp, nfsl_list);
 2468                                 if (lp->nfsl_defunct &&
 2469                                     LIST_EMPTY(&lp->nfsl_lock)) {
 2470                                     LIST_FOREACH(olp, &lh, nfsl_list) {
 2471                                         if (!NFSBCMP(olp->nfsl_owner,
 2472                                             lp->nfsl_owner,NFSV4CL_LOCKNAMELEN))
 2473                                             break;
 2474                                     }
 2475                                     if (olp == NULL) {
 2476                                         LIST_REMOVE(lp, nfsl_list);
 2477                                         LIST_INSERT_HEAD(&lh, lp, nfsl_list);
 2478                                     } else {
 2479                                         nfscl_freelockowner(lp, 0);
 2480                                     }
 2481                                 }
 2482                                 lp = nlp;
 2483                             }
 2484                         }
 2485                     }
 2486                     owp = nowp;
 2487                 }
 2488 
 2489                 /* also search the defunct list */
 2490                 lp = LIST_FIRST(&clp->nfsc_defunctlockowner);
 2491                 while (lp != NULL) {
 2492                     nlp = LIST_NEXT(lp, nfsl_list);
 2493                     if (lp->nfsl_defunct) {
 2494                         LIST_FOREACH(olp, &lh, nfsl_list) {
 2495                             if (!NFSBCMP(olp->nfsl_owner, lp->nfsl_owner,
 2496                                 NFSV4CL_LOCKNAMELEN))
 2497                                 break;
 2498                         }
 2499                         if (olp == NULL) {
 2500                             LIST_REMOVE(lp, nfsl_list);
 2501                             LIST_INSERT_HEAD(&lh, lp, nfsl_list);
 2502                         } else {
 2503                             nfscl_freelockowner(lp, 0);
 2504                         }
 2505                     }
 2506                     lp = nlp;
 2507                 }
 2508                 /* and release defunct lock owners */
 2509                 LIST_FOREACH_SAFE(lp, &lh, nfsl_list, nlp) {
 2510                     nfscl_freelockowner(lp, 0);
 2511                 }
 2512 
 2513                 /*
 2514                  * Do the recall on any delegations. To avoid trouble, always
 2515                  * come back up here after having slept.
 2516                  */
 2517                 igotlock = 0;
 2518 tryagain:
 2519                 dp = TAILQ_FIRST(&clp->nfsc_deleg);
 2520                 while (dp != NULL) {
 2521                         ndp = TAILQ_NEXT(dp, nfsdl_list);
 2522                         if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
 2523                                 /*
 2524                                  * Wait for outstanding I/O ops to be done.
 2525                                  */
 2526                                 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
 2527                                     if (igotlock) {
 2528                                         nfsv4_unlock(&clp->nfsc_lock, 0);
 2529                                         igotlock = 0;
 2530                                     }
 2531                                     dp->nfsdl_rwlock.nfslock_lock |=
 2532                                         NFSV4LOCK_WANTED;
 2533                                     (void) nfsmsleep(&dp->nfsdl_rwlock,
 2534                                         NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
 2535                                         NULL);
 2536                                     goto tryagain;
 2537                                 }
 2538                                 while (!igotlock) {
 2539                                     igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
 2540                                         &islept, NFSCLSTATEMUTEXPTR, NULL);
 2541                                     if (islept)
 2542                                         goto tryagain;
 2543                                 }
 2544                                 NFSUNLOCKCLSTATE();
 2545                                 newnfs_copycred(&dp->nfsdl_cred, cred);
 2546                                 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
 2547                                     NULL, cred, p, 1);
 2548                                 if (!ret) {
 2549                                     nfscl_cleandeleg(dp);
 2550                                     TAILQ_REMOVE(&clp->nfsc_deleg, dp,
 2551                                         nfsdl_list);
 2552                                     LIST_REMOVE(dp, nfsdl_hash);
 2553                                     TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
 2554                                     nfscl_delegcnt--;
 2555                                     newnfsstats.cldelegates--;
 2556                                 }
 2557                                 NFSLOCKCLSTATE();
 2558                         }
 2559                         dp = ndp;
 2560                 }
 2561 
 2562                 /*
 2563                  * Clear out old delegations, if we are above the high water
 2564                  * mark. Only clear out ones with no state related to them.
 2565                  * The tailq list is in LRU order.
 2566                  */
 2567                 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
 2568                 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
 2569                     ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
 2570                     if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
 2571                         dp->nfsdl_rwlock.nfslock_lock == 0 &&
 2572                         dp->nfsdl_timestamp < NFSD_MONOSEC &&
 2573                         (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
 2574                           NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
 2575                         clearok = 1;
 2576                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 2577                             op = LIST_FIRST(&owp->nfsow_open);
 2578                             if (op != NULL) {
 2579                                 clearok = 0;
 2580                                 break;
 2581                             }
 2582                         }
 2583                         if (clearok) {
 2584                             LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 2585                                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
 2586                                     clearok = 0;
 2587                                     break;
 2588                                 }
 2589                             }
 2590                         }
 2591                         if (clearok) {
 2592                             TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
 2593                             LIST_REMOVE(dp, nfsdl_hash);
 2594                             TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
 2595                             nfscl_delegcnt--;
 2596                             newnfsstats.cldelegates--;
 2597                         }
 2598                     }
 2599                     dp = ndp;
 2600                 }
 2601                 if (igotlock)
 2602                         nfsv4_unlock(&clp->nfsc_lock, 0);
 2603                 NFSUNLOCKCLSTATE();
 2604 
 2605                 /*
 2606                  * Delegreturn any delegations cleaned out or recalled.
 2607                  */
 2608                 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
 2609                         newnfs_copycred(&dp->nfsdl_cred, cred);
 2610                         (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
 2611                         TAILQ_REMOVE(&dh, dp, nfsdl_list);
 2612                         FREE((caddr_t)dp, M_NFSCLDELEG);
 2613                 }
 2614 
 2615 #if defined(APPLEKEXT) || defined(__FreeBSD__)
 2616                 /*
 2617                  * Simulate the calls to nfscl_cleanup() when a process
 2618                  * exits, since the call can't be patched into exit().
 2619                  */
 2620                 {
 2621                         struct timespec mytime;
 2622                         static time_t prevsec = 0;
 2623 
 2624                         NFSGETNANOTIME(&mytime);
 2625                         if (prevsec != mytime.tv_sec) {
 2626                                 prevsec = mytime.tv_sec;
 2627                                 nfscl_cleanupkext(clp);
 2628                         }
 2629                 }
 2630 #endif  /* APPLEKEXT || __FreeBSD__ */
 2631 
 2632                 NFSLOCKCLSTATE();
 2633                 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
 2634                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
 2635                             hz);
 2636                 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
 2637                         clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
 2638                         NFSUNLOCKCLSTATE();
 2639                         NFSFREECRED(cred);
 2640                         wakeup((caddr_t)clp);
 2641                         return;
 2642                 }
 2643                 NFSUNLOCKCLSTATE();
 2644         }
 2645 }
 2646 
 2647 /*
 2648  * Initiate state recovery. Called when NFSERR_STALECLIENTID or
 2649  * NFSERR_STALESTATEID is received.
 2650  */
 2651 APPLESTATIC void
 2652 nfscl_initiate_recovery(struct nfsclclient *clp)
 2653 {
 2654 
 2655         if (clp == NULL)
 2656                 return;
 2657         NFSLOCKCLSTATE();
 2658         clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
 2659         NFSUNLOCKCLSTATE();
 2660         wakeup((caddr_t)clp);
 2661 }
 2662 
 2663 /*
 2664  * Dump out the state stuff for debugging.
 2665  */
 2666 APPLESTATIC void
 2667 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
 2668     int lockowner, int locks)
 2669 {
 2670         struct nfsclclient *clp;
 2671         struct nfsclowner *owp;
 2672         struct nfsclopen *op;
 2673         struct nfscllockowner *lp;
 2674         struct nfscllock *lop;
 2675         struct nfscldeleg *dp;
 2676 
 2677         clp = nmp->nm_clp;
 2678         if (clp == NULL) {
 2679                 printf("nfscl dumpstate NULL clp\n");
 2680                 return;
 2681         }
 2682         NFSLOCKCLSTATE();
 2683         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
 2684           LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 2685             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
 2686                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
 2687                     owp->nfsow_owner[0], owp->nfsow_owner[1],
 2688                     owp->nfsow_owner[2], owp->nfsow_owner[3],
 2689                     owp->nfsow_seqid);
 2690             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2691                 if (opens)
 2692                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
 2693                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
 2694                         op->nfso_stateid.other[2], op->nfso_opencnt,
 2695                         op->nfso_fh[12]);
 2696                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 2697                     if (lockowner)
 2698                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
 2699                             lp->nfsl_owner[0], lp->nfsl_owner[1],
 2700                             lp->nfsl_owner[2], lp->nfsl_owner[3],
 2701                             lp->nfsl_seqid,
 2702                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
 2703                             lp->nfsl_stateid.other[2]);
 2704                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
 2705                         if (locks)
 2706 #ifdef __FreeBSD__
 2707                             printf("lck typ=%d fst=%ju end=%ju\n",
 2708                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
 2709                                 (intmax_t)lop->nfslo_end);
 2710 #else
 2711                             printf("lck typ=%d fst=%qd end=%qd\n",
 2712                                 lop->nfslo_type, lop->nfslo_first,
 2713                                 lop->nfslo_end);
 2714 #endif
 2715                     }
 2716                 }
 2717             }
 2718           }
 2719         }
 2720         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2721             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
 2722                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
 2723                     owp->nfsow_owner[0], owp->nfsow_owner[1],
 2724                     owp->nfsow_owner[2], owp->nfsow_owner[3],
 2725                     owp->nfsow_seqid);
 2726             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2727                 if (opens)
 2728                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
 2729                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
 2730                         op->nfso_stateid.other[2], op->nfso_opencnt,
 2731                         op->nfso_fh[12]);
 2732                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
 2733                     if (lockowner)
 2734                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
 2735                             lp->nfsl_owner[0], lp->nfsl_owner[1],
 2736                             lp->nfsl_owner[2], lp->nfsl_owner[3],
 2737                             lp->nfsl_seqid,
 2738                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
 2739                             lp->nfsl_stateid.other[2]);
 2740                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
 2741                         if (locks)
 2742 #ifdef __FreeBSD__
 2743                             printf("lck typ=%d fst=%ju end=%ju\n",
 2744                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
 2745                                 (intmax_t)lop->nfslo_end);
 2746 #else
 2747                             printf("lck typ=%d fst=%qd end=%qd\n",
 2748                                 lop->nfslo_type, lop->nfslo_first,
 2749                                 lop->nfslo_end);
 2750 #endif
 2751                     }
 2752                 }
 2753             }
 2754         }
 2755         NFSUNLOCKCLSTATE();
 2756 }
 2757 
 2758 /*
 2759  * Check for duplicate open owners and opens.
 2760  * (Only used as a diagnostic aid.)
 2761  */
 2762 APPLESTATIC void
 2763 nfscl_dupopen(vnode_t vp, int dupopens)
 2764 {
 2765         struct nfsclclient *clp;
 2766         struct nfsclowner *owp, *owp2;
 2767         struct nfsclopen *op, *op2;
 2768         struct nfsfh *nfhp;
 2769 
 2770         clp = VFSTONFS(vnode_mount(vp))->nm_clp;
 2771         if (clp == NULL) {
 2772                 printf("nfscl dupopen NULL clp\n");
 2773                 return;
 2774         }
 2775         nfhp = VTONFS(vp)->n_fhp;
 2776         NFSLOCKCLSTATE();
 2777 
 2778         /*
 2779          * First, search for duplicate owners.
 2780          * These should never happen!
 2781          */
 2782         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
 2783             LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2784                 if (owp != owp2 &&
 2785                     !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
 2786                     NFSV4CL_LOCKNAMELEN)) {
 2787                         NFSUNLOCKCLSTATE();
 2788                         printf("DUP OWNER\n");
 2789                         nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
 2790                         return;
 2791                 }
 2792             }
 2793         }
 2794 
 2795         /*
 2796          * Now, search for duplicate stateids.
 2797          * These shouldn't happen, either.
 2798          */
 2799         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
 2800             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
 2801                 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2802                     LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2803                         if (op != op2 &&
 2804                             (op->nfso_stateid.other[0] != 0 ||
 2805                              op->nfso_stateid.other[1] != 0 ||
 2806                              op->nfso_stateid.other[2] != 0) &&
 2807                             op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
 2808                             op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
 2809                             op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
 2810                             NFSUNLOCKCLSTATE();
 2811                             printf("DUP STATEID\n");
 2812                             nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
 2813                                 0);
 2814                             return;
 2815                         }
 2816                     }
 2817                 }
 2818             }
 2819         }
 2820 
 2821         /*
 2822          * Now search for duplicate opens.
 2823          * Duplicate opens for the same owner
 2824          * should never occur. Other duplicates are
 2825          * possible and are checked for if "dupopens"
 2826          * is true.
 2827          */
 2828         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
 2829             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
 2830                 if (nfhp->nfh_len == op2->nfso_fhlen &&
 2831                     !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
 2832                     LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2833                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2834                             if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
 2835                                 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
 2836                                 (!NFSBCMP(op->nfso_own->nfsow_owner,
 2837                                  op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
 2838                                  dupopens)) {
 2839                                 if (!NFSBCMP(op->nfso_own->nfsow_owner,
 2840                                     op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
 2841                                     NFSUNLOCKCLSTATE();
 2842                                     printf("BADDUP OPEN\n");
 2843                                 } else {
 2844                                     NFSUNLOCKCLSTATE();
 2845                                     printf("DUP OPEN\n");
 2846                                 }
 2847                                 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
 2848                                     0, 0);
 2849                                 return;
 2850                             }
 2851                         }
 2852                     }
 2853                 }
 2854             }
 2855         }
 2856         NFSUNLOCKCLSTATE();
 2857 }
 2858 
 2859 /*
 2860  * During close, find an open that needs to be dereferenced and
 2861  * dereference it. If there are no more opens for this file,
 2862  * log a message to that effect.
 2863  * Opens aren't actually Close'd until VOP_INACTIVE() is performed
 2864  * on the file's vnode.
 2865  * This is the safe way, since it is difficult to identify
 2866  * which open the close is for and I/O can be performed after the
 2867  * close(2) system call when a file is mmap'd.
 2868  * If it returns 0 for success, there will be a referenced
 2869  * clp returned via clpp.
 2870  */
 2871 APPLESTATIC int
 2872 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
 2873 {
 2874         struct nfsclclient *clp;
 2875         struct nfsclowner *owp;
 2876         struct nfsclopen *op;
 2877         struct nfscldeleg *dp;
 2878         struct nfsfh *nfhp;
 2879         int error, notdecr;
 2880 
 2881         error = nfscl_getcl(vp, NULL, NULL, &clp);
 2882         if (error)
 2883                 return (error);
 2884         *clpp = clp;
 2885 
 2886         nfhp = VTONFS(vp)->n_fhp;
 2887         notdecr = 1;
 2888         NFSLOCKCLSTATE();
 2889         /*
 2890          * First, look for one under a delegation that was locally issued
 2891          * and just decrement the opencnt for it. Since all my Opens against
 2892          * the server are DENY_NONE, I don't see a problem with hanging
 2893          * onto them. (It is much easier to use one of the extant Opens
 2894          * that I already have on the server when a Delegation is recalled
 2895          * than to do fresh Opens.) Someday, I might need to rethink this, but.
 2896          */
 2897         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
 2898         if (dp != NULL) {
 2899                 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 2900                         op = LIST_FIRST(&owp->nfsow_open);
 2901                         if (op != NULL) {
 2902                                 /*
 2903                                  * Since a delegation is for a file, there
 2904                                  * should never be more than one open for
 2905                                  * each openowner.
 2906                                  */
 2907                                 if (LIST_NEXT(op, nfso_list) != NULL)
 2908                                         panic("nfscdeleg opens");
 2909                                 if (notdecr && op->nfso_opencnt > 0) {
 2910                                         notdecr = 0;
 2911                                         op->nfso_opencnt--;
 2912                                         break;
 2913                                 }
 2914                         }
 2915                 }
 2916         }
 2917 
 2918         /* Now process the opens against the server. */
 2919         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2920                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 2921                         if (op->nfso_fhlen == nfhp->nfh_len &&
 2922                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
 2923                             nfhp->nfh_len)) {
 2924                                 /* Found an open, decrement cnt if possible */
 2925                                 if (notdecr && op->nfso_opencnt > 0) {
 2926                                         notdecr = 0;
 2927                                         op->nfso_opencnt--;
 2928                                 }
 2929                                 /*
 2930                                  * There are more opens, so just return.
 2931                                  */
 2932                                 if (op->nfso_opencnt > 0) {
 2933                                         NFSUNLOCKCLSTATE();
 2934                                         return (0);
 2935                                 }
 2936                         }
 2937                 }
 2938         }
 2939         NFSUNLOCKCLSTATE();
 2940         if (notdecr)
 2941                 printf("nfscl: never fnd open\n");
 2942         return (0);
 2943 }
 2944 
 2945 APPLESTATIC int
 2946 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
 2947 {
 2948         struct nfsclclient *clp;
 2949         struct nfsclowner *owp, *nowp;
 2950         struct nfsclopen *op;
 2951         struct nfscldeleg *dp;
 2952         struct nfsfh *nfhp;
 2953         int error;
 2954 
 2955         error = nfscl_getcl(vp, NULL, NULL, &clp);
 2956         if (error)
 2957                 return (error);
 2958         *clpp = clp;
 2959 
 2960         nfhp = VTONFS(vp)->n_fhp;
 2961         NFSLOCKCLSTATE();
 2962         /*
 2963          * First get rid of the local Open structures, which should be no
 2964          * longer in use.
 2965          */
 2966         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
 2967         if (dp != NULL) {
 2968                 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
 2969                         op = LIST_FIRST(&owp->nfsow_open);
 2970                         if (op != NULL) {
 2971                                 KASSERT((op->nfso_opencnt == 0),
 2972                                     ("nfscl: bad open cnt on deleg"));
 2973                                 nfscl_freeopen(op, 1);
 2974                         }
 2975                         nfscl_freeopenowner(owp, 1);
 2976                 }
 2977         }
 2978 
 2979         /* Now process the opens against the server. */
 2980 lookformore:
 2981         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 2982                 op = LIST_FIRST(&owp->nfsow_open);
 2983                 while (op != NULL) {
 2984                         if (op->nfso_fhlen == nfhp->nfh_len &&
 2985                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
 2986                             nfhp->nfh_len)) {
 2987                                 /* Found an open, close it. */
 2988                                 KASSERT((op->nfso_opencnt == 0),
 2989                                     ("nfscl: bad open cnt on server"));
 2990                                 NFSUNLOCKCLSTATE();
 2991                                 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
 2992                                     p);
 2993                                 NFSLOCKCLSTATE();
 2994                                 goto lookformore;
 2995                         }
 2996                         op = LIST_NEXT(op, nfso_list);
 2997                 }
 2998         }
 2999         NFSUNLOCKCLSTATE();
 3000         return (0);
 3001 }
 3002 
 3003 /*
 3004  * Return all delegations on this client.
 3005  * (Must be called with client sleep lock.)
 3006  */
 3007 static void
 3008 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
 3009 {
 3010         struct nfscldeleg *dp, *ndp;
 3011         struct ucred *cred;
 3012 
 3013         cred = newnfs_getcred();
 3014         TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
 3015                 nfscl_cleandeleg(dp);
 3016                 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
 3017                 nfscl_freedeleg(&clp->nfsc_deleg, dp);
 3018         }
 3019         NFSFREECRED(cred);
 3020 }
 3021 
 3022 /*
 3023  * Do a callback RPC.
 3024  */
 3025 APPLESTATIC void
 3026 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
 3027 {
 3028         int i, op;
 3029         u_int32_t *tl;
 3030         struct nfsclclient *clp;
 3031         struct nfscldeleg *dp = NULL;
 3032         int numops, taglen = -1, error = 0, trunc, ret = 0;
 3033         u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident;
 3034         u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
 3035         vnode_t vp = NULL;
 3036         struct nfsnode *np;
 3037         struct vattr va;
 3038         struct nfsfh *nfhp;
 3039         mount_t mp;
 3040         nfsattrbit_t attrbits, rattrbits;
 3041         nfsv4stateid_t stateid;
 3042 
 3043         nfsrvd_rephead(nd);
 3044         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3045         taglen = fxdr_unsigned(int, *tl);
 3046         if (taglen < 0) {
 3047                 error = EBADRPC;
 3048                 goto nfsmout;
 3049         }
 3050         if (taglen <= NFSV4_SMALLSTR)
 3051                 tagstr = tag;
 3052         else
 3053                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
 3054         error = nfsrv_mtostr(nd, tagstr, taglen);
 3055         if (error) {
 3056                 if (taglen > NFSV4_SMALLSTR)
 3057                         free(tagstr, M_TEMP);
 3058                 taglen = -1;
 3059                 goto nfsmout;
 3060         }
 3061         (void) nfsm_strtom(nd, tag, taglen);
 3062         if (taglen > NFSV4_SMALLSTR) {
 3063                 free(tagstr, M_TEMP);
 3064         }
 3065         NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
 3066         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
 3067         minorvers = fxdr_unsigned(u_int32_t, *tl++);
 3068         if (minorvers != NFSV4_MINORVERSION)
 3069                 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
 3070         cbident = fxdr_unsigned(u_int32_t, *tl++);
 3071         if (nd->nd_repstat)
 3072                 numops = 0;
 3073         else
 3074                 numops = fxdr_unsigned(int, *tl);
 3075         /*
 3076          * Loop around doing the sub ops.
 3077          */
 3078         for (i = 0; i < numops; i++) {
 3079                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 3080                 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
 3081                 *repp++ = *tl;
 3082                 op = fxdr_unsigned(int, *tl);
 3083                 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) {
 3084                     nd->nd_repstat = NFSERR_OPILLEGAL;
 3085                     *repp = nfscl_errmap(nd);
 3086                     retops++;
 3087                     break;
 3088                 }
 3089                 nd->nd_procnum = op;
 3090                 newnfsstats.cbrpccnt[nd->nd_procnum]++;
 3091                 switch (op) {
 3092                 case NFSV4OP_CBGETATTR:
 3093                         clp = NULL;
 3094                         error = nfsm_getfh(nd, &nfhp);
 3095                         if (!error)
 3096                                 error = nfsrv_getattrbits(nd, &attrbits,
 3097                                     NULL, NULL);
 3098                         if (!error) {
 3099                                 mp = nfscl_getmnt(cbident);
 3100                                 if (mp == NULL)
 3101                                         error = NFSERR_SERVERFAULT;
 3102                         }
 3103                         if (!error) {
 3104                                 dp = NULL;
 3105                                 NFSLOCKCLSTATE();
 3106                                 clp = nfscl_findcl(VFSTONFS(mp));
 3107                                 if (clp != NULL)
 3108                                         dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
 3109                                             nfhp->nfh_len);
 3110                                 NFSUNLOCKCLSTATE();
 3111                                 if (dp == NULL)
 3112                                         error = NFSERR_SERVERFAULT;
 3113                         }
 3114                         if (!error) {
 3115                                 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh,
 3116                                     nfhp->nfh_len, p, &np);
 3117                                 if (!ret)
 3118                                         vp = NFSTOV(np);
 3119                         }
 3120                         if (nfhp != NULL)
 3121                                 FREE((caddr_t)nfhp, M_NFSFH);
 3122                         if (!error) {
 3123                                 NFSZERO_ATTRBIT(&rattrbits);
 3124                                 if (NFSISSET_ATTRBIT(&attrbits,
 3125                                     NFSATTRBIT_SIZE)) {
 3126                                         if (!ret)
 3127                                                 va.va_size = np->n_size;
 3128                                         else
 3129                                                 va.va_size = dp->nfsdl_size;
 3130                                         NFSSETBIT_ATTRBIT(&rattrbits,
 3131                                             NFSATTRBIT_SIZE);
 3132                                 }
 3133                                 if (NFSISSET_ATTRBIT(&attrbits,
 3134                                     NFSATTRBIT_CHANGE)) {
 3135                                         va.va_filerev = dp->nfsdl_change;
 3136                                         if (ret || (np->n_flag & NDELEGMOD))
 3137                                                 va.va_filerev++;
 3138                                         NFSSETBIT_ATTRBIT(&rattrbits,
 3139                                             NFSATTRBIT_CHANGE);
 3140                                 }
 3141                                 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
 3142                                     NULL, 0, &rattrbits, NULL, NULL, 0, 0, 0, 0,
 3143                                     (uint64_t)0);
 3144                                 if (!ret)
 3145                                         vrele(vp);
 3146                         }
 3147                         break;
 3148                 case NFSV4OP_CBRECALL:
 3149                         clp = NULL;
 3150                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
 3151                             NFSX_UNSIGNED);
 3152                         stateid.seqid = *tl++;
 3153                         NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
 3154                             NFSX_STATEIDOTHER);
 3155                         tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
 3156                         trunc = fxdr_unsigned(int, *tl);
 3157                         error = nfsm_getfh(nd, &nfhp);
 3158                         if (!error) {
 3159                                 mp = nfscl_getmnt(cbident);
 3160                                 if (mp == NULL)
 3161                                         error = NFSERR_SERVERFAULT;
 3162                         }
 3163                         if (!error) {
 3164                                 NFSLOCKCLSTATE();
 3165                                 clp = nfscl_findcl(VFSTONFS(mp));
 3166                                 if (clp != NULL) {
 3167                                         dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
 3168                                             nfhp->nfh_len);
 3169                                         if (dp != NULL && (dp->nfsdl_flags &
 3170                                             NFSCLDL_DELEGRET) == 0) {
 3171                                                 dp->nfsdl_flags |=
 3172                                                     NFSCLDL_RECALL;
 3173                                                 wakeup((caddr_t)clp);
 3174                                         }
 3175                                 } else {
 3176                                         error = NFSERR_SERVERFAULT;
 3177                                 }
 3178                                 NFSUNLOCKCLSTATE();
 3179                         }
 3180                         if (nfhp != NULL)
 3181                                 FREE((caddr_t)nfhp, M_NFSFH);
 3182                         break;
 3183                 };
 3184                 if (error) {
 3185                         if (error == EBADRPC || error == NFSERR_BADXDR) {
 3186                                 nd->nd_repstat = NFSERR_BADXDR;
 3187                         } else {
 3188                                 nd->nd_repstat = error;
 3189                         }
 3190                         error = 0;
 3191                 }
 3192                 retops++;
 3193                 if (nd->nd_repstat) {
 3194                         *repp = nfscl_errmap(nd);
 3195                         break;
 3196                 } else
 3197                         *repp = 0;      /* NFS4_OK */
 3198         }
 3199 nfsmout:
 3200         if (error) {
 3201                 if (error == EBADRPC || error == NFSERR_BADXDR)
 3202                         nd->nd_repstat = NFSERR_BADXDR;
 3203                 else
 3204                         printf("nfsv4 comperr1=%d\n", error);
 3205         }
 3206         if (taglen == -1) {
 3207                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
 3208                 *tl++ = 0;
 3209                 *tl = 0;
 3210         } else {
 3211                 *retopsp = txdr_unsigned(retops);
 3212         }
 3213         *nd->nd_errp = nfscl_errmap(nd);
 3214 }
 3215 
 3216 /*
 3217  * Generate the next cbident value. Basically just increment a static value
 3218  * and then check that it isn't already in the list, if it has wrapped around.
 3219  */
 3220 static u_int32_t
 3221 nfscl_nextcbident(void)
 3222 {
 3223         struct nfsclclient *clp;
 3224         int matched;
 3225         static u_int32_t nextcbident = 0;
 3226         static int haswrapped = 0;
 3227 
 3228         nextcbident++;
 3229         if (nextcbident == 0)
 3230                 haswrapped = 1;
 3231         if (haswrapped) {
 3232                 /*
 3233                  * Search the clientid list for one already using this cbident.
 3234                  */
 3235                 do {
 3236                         matched = 0;
 3237                         NFSLOCKCLSTATE();
 3238                         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
 3239                                 if (clp->nfsc_cbident == nextcbident) {
 3240                                         matched = 1;
 3241                                         break;
 3242                                 }
 3243                         }
 3244                         NFSUNLOCKCLSTATE();
 3245                         if (matched == 1)
 3246                                 nextcbident++;
 3247                 } while (matched);
 3248         }
 3249         return (nextcbident);
 3250 }
 3251 
 3252 /*
 3253  * Get the mount point related to a given cbident.
 3254  */
 3255 static mount_t
 3256 nfscl_getmnt(u_int32_t cbident)
 3257 {
 3258         struct nfsclclient *clp;
 3259         struct nfsmount *nmp;
 3260 
 3261         NFSLOCKCLSTATE();
 3262         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
 3263                 if (clp->nfsc_cbident == cbident)
 3264                         break;
 3265         }
 3266         if (clp == NULL) {
 3267                 NFSUNLOCKCLSTATE();
 3268                 return (NULL);
 3269         }
 3270         nmp = clp->nfsc_nmp;
 3271         NFSUNLOCKCLSTATE();
 3272         return (nmp->nm_mountp);
 3273 }
 3274 
 3275 /*
 3276  * Search for a lock conflict locally on the client. A conflict occurs if
 3277  * - not same owner and overlapping byte range and at least one of them is
 3278  *   a write lock or this is an unlock.
 3279  */
 3280 static int
 3281 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
 3282     struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
 3283     struct nfscllock **lopp)
 3284 {
 3285         struct nfsclowner *owp;
 3286         struct nfsclopen *op;
 3287         int ret;
 3288 
 3289         if (dp != NULL) {
 3290                 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
 3291                 if (ret)
 3292                         return (ret);
 3293         }
 3294         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 3295                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 3296                         if (op->nfso_fhlen == fhlen &&
 3297                             !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
 3298                                 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
 3299                                     own, lopp);
 3300                                 if (ret)
 3301                                         return (ret);
 3302                         }
 3303                 }
 3304         }
 3305         return (0);
 3306 }
 3307 
 3308 static int
 3309 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
 3310     u_int8_t *own, struct nfscllock **lopp)
 3311 {
 3312         struct nfscllockowner *lp;
 3313         struct nfscllock *lop;
 3314 
 3315         LIST_FOREACH(lp, lhp, nfsl_list) {
 3316                 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
 3317                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
 3318                                 if (lop->nfslo_first >= nlop->nfslo_end)
 3319                                         break;
 3320                                 if (lop->nfslo_end <= nlop->nfslo_first)
 3321                                         continue;
 3322                                 if (lop->nfslo_type == F_WRLCK ||
 3323                                     nlop->nfslo_type == F_WRLCK ||
 3324                                     nlop->nfslo_type == F_UNLCK) {
 3325                                         if (lopp != NULL)
 3326                                                 *lopp = lop;
 3327                                         return (NFSERR_DENIED);
 3328                                 }
 3329                         }
 3330                 }
 3331         }
 3332         return (0);
 3333 }
 3334 
 3335 /*
 3336  * Check for a local conflicting lock.
 3337  */
 3338 APPLESTATIC int
 3339 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
 3340     u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
 3341 {
 3342         struct nfscllock *lop, nlck;
 3343         struct nfscldeleg *dp;
 3344         struct nfsnode *np;
 3345         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 3346         int error;
 3347 
 3348         nlck.nfslo_type = fl->l_type;
 3349         nlck.nfslo_first = off;
 3350         if (len == NFS64BITSSET) {
 3351                 nlck.nfslo_end = NFS64BITSSET;
 3352         } else {
 3353                 nlck.nfslo_end = off + len;
 3354                 if (nlck.nfslo_end <= nlck.nfslo_first)
 3355                         return (NFSERR_INVAL);
 3356         }
 3357         np = VTONFS(vp);
 3358         nfscl_filllockowner(id, own, flags);
 3359         NFSLOCKCLSTATE();
 3360         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 3361         error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
 3362             &nlck, own, dp, &lop);
 3363         if (error != 0) {
 3364                 fl->l_whence = SEEK_SET;
 3365                 fl->l_start = lop->nfslo_first;
 3366                 if (lop->nfslo_end == NFS64BITSSET)
 3367                         fl->l_len = 0;
 3368                 else
 3369                         fl->l_len = lop->nfslo_end - lop->nfslo_first;
 3370                 fl->l_pid = (pid_t)0;
 3371                 fl->l_type = lop->nfslo_type;
 3372                 error = -1;                     /* no RPC required */
 3373         } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
 3374             fl->l_type == F_RDLCK)) {
 3375                 /*
 3376                  * The delegation ensures that there isn't a conflicting
 3377                  * lock on the server, so return -1 to indicate an RPC
 3378                  * isn't required.
 3379                  */
 3380                 fl->l_type = F_UNLCK;
 3381                 error = -1;
 3382         }
 3383         NFSUNLOCKCLSTATE();
 3384         return (error);
 3385 }
 3386 
 3387 /*
 3388  * Handle Recall of a delegation.
 3389  * The clp must be exclusive locked when this is called.
 3390  */
 3391 static int
 3392 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
 3393     struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
 3394     int called_from_renewthread)
 3395 {
 3396         struct nfsclowner *owp, *lowp, *nowp;
 3397         struct nfsclopen *op, *lop;
 3398         struct nfscllockowner *lp;
 3399         struct nfscllock *lckp;
 3400         struct nfsnode *np;
 3401         int error = 0, ret, gotvp = 0;
 3402 
 3403         if (vp == NULL) {
 3404                 /*
 3405                  * First, get a vnode for the file. This is needed to do RPCs.
 3406                  */
 3407                 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
 3408                     dp->nfsdl_fhlen, p, &np);
 3409                 if (ret) {
 3410                         /*
 3411                          * File isn't open, so nothing to move over to the
 3412                          * server.
 3413                          */
 3414                         return (0);
 3415                 }
 3416                 vp = NFSTOV(np);
 3417                 gotvp = 1;
 3418         } else {
 3419                 np = VTONFS(vp);
 3420         }
 3421         dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
 3422 
 3423         /*
 3424          * Ok, if it's a write delegation, flush data to the server, so
 3425          * that close/open consistency is retained.
 3426          */
 3427         ret = 0;
 3428         NFSLOCKNODE(np);
 3429         if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
 3430                 np->n_flag |= NDELEGRECALL;
 3431                 NFSUNLOCKNODE(np);
 3432                 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1,
 3433                     called_from_renewthread);
 3434                 NFSLOCKNODE(np);
 3435                 np->n_flag &= ~NDELEGRECALL;
 3436         }
 3437         NFSINVALATTRCACHE(np);
 3438         NFSUNLOCKNODE(np);
 3439         if (ret == EIO && called_from_renewthread != 0) {
 3440                 /*
 3441                  * If the flush failed with EIO for the renew thread,
 3442                  * return now, so that the dirty buffer will be flushed
 3443                  * later.
 3444                  */
 3445                 if (gotvp != 0)
 3446                         vrele(vp);
 3447                 return (ret);
 3448         }
 3449 
 3450         /*
 3451          * Now, for each openowner with opens issued locally, move them
 3452          * over to state against the server.
 3453          */
 3454         LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
 3455                 lop = LIST_FIRST(&lowp->nfsow_open);
 3456                 if (lop != NULL) {
 3457                         if (LIST_NEXT(lop, nfso_list) != NULL)
 3458                                 panic("nfsdlg mult opens");
 3459                         /*
 3460                          * Look for the same openowner against the server.
 3461                          */
 3462                         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
 3463                                 if (!NFSBCMP(lowp->nfsow_owner,
 3464                                     owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
 3465                                         newnfs_copycred(&dp->nfsdl_cred, cred);
 3466                                         ret = nfscl_moveopen(vp, clp, nmp, lop,
 3467                                             owp, dp, cred, p);
 3468                                         if (ret == NFSERR_STALECLIENTID ||
 3469                                             ret == NFSERR_STALEDONTRECOVER) {
 3470                                                 if (gotvp)
 3471                                                         vrele(vp);
 3472                                                 return (ret);
 3473                                         }
 3474                                         if (ret) {
 3475                                                 nfscl_freeopen(lop, 1);
 3476                                                 if (!error)
 3477                                                         error = ret;
 3478                                         }
 3479                                         break;
 3480                                 }
 3481                         }
 3482 
 3483                         /*
 3484                          * If no openowner found, create one and get an open
 3485                          * for it.
 3486                          */
 3487                         if (owp == NULL) {
 3488                                 MALLOC(nowp, struct nfsclowner *,
 3489                                     sizeof (struct nfsclowner), M_NFSCLOWNER,
 3490                                     M_WAITOK);
 3491                                 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 
 3492                                     NULL, lowp->nfsow_owner, dp->nfsdl_fh,
 3493                                     dp->nfsdl_fhlen, NULL);
 3494                                 newnfs_copycred(&dp->nfsdl_cred, cred);
 3495                                 ret = nfscl_moveopen(vp, clp, nmp, lop,
 3496                                     owp, dp, cred, p);
 3497                                 if (ret) {
 3498                                         nfscl_freeopenowner(owp, 0);
 3499                                         if (ret == NFSERR_STALECLIENTID ||
 3500                                             ret == NFSERR_STALEDONTRECOVER) {
 3501                                                 if (gotvp)
 3502                                                         vrele(vp);
 3503                                                 return (ret);
 3504                                         }
 3505                                         if (ret) {
 3506                                                 nfscl_freeopen(lop, 1);
 3507                                                 if (!error)
 3508                                                         error = ret;
 3509                                         }
 3510                                 }
 3511                         }
 3512                 }
 3513         }
 3514 
 3515         /*
 3516          * Now, get byte range locks for any locks done locally.
 3517          */
 3518         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 3519                 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
 3520                         newnfs_copycred(&dp->nfsdl_cred, cred);
 3521                         ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
 3522                         if (ret == NFSERR_STALESTATEID ||
 3523                             ret == NFSERR_STALEDONTRECOVER ||
 3524                             ret == NFSERR_STALECLIENTID) {
 3525                                 if (gotvp)
 3526                                         vrele(vp);
 3527                                 return (ret);
 3528                         }
 3529                         if (ret && !error)
 3530                                 error = ret;
 3531                 }
 3532         }
 3533         if (gotvp)
 3534                 vrele(vp);
 3535         return (error);
 3536 }
 3537 
 3538 /*
 3539  * Move a locally issued open over to an owner on the state list.
 3540  * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
 3541  * returns with it unlocked.
 3542  */
 3543 static int
 3544 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
 3545     struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
 3546     struct ucred *cred, NFSPROC_T *p)
 3547 {
 3548         struct nfsclopen *op, *nop;
 3549         struct nfscldeleg *ndp;
 3550         struct nfsnode *np;
 3551         int error = 0, newone;
 3552 
 3553         /*
 3554          * First, look for an appropriate open, If found, just increment the
 3555          * opencnt in it.
 3556          */
 3557         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 3558                 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
 3559                     op->nfso_fhlen == lop->nfso_fhlen &&
 3560                     !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
 3561                         op->nfso_opencnt += lop->nfso_opencnt;
 3562                         nfscl_freeopen(lop, 1);
 3563                         return (0);
 3564                 }
 3565         }
 3566 
 3567         /* No appropriate open, so we have to do one against the server. */
 3568         np = VTONFS(vp);
 3569         MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
 3570             lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
 3571         newone = 0;
 3572         nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
 3573             lop->nfso_fh, lop->nfso_fhlen, &newone);
 3574         ndp = dp;
 3575         error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
 3576             lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
 3577             NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
 3578         if (error) {
 3579                 if (newone)
 3580                         nfscl_freeopen(op, 0);
 3581         } else {
 3582                 if (newone)
 3583                         newnfs_copyincred(cred, &op->nfso_cred);
 3584                 op->nfso_mode |= lop->nfso_mode;
 3585                 op->nfso_opencnt += lop->nfso_opencnt;
 3586                 nfscl_freeopen(lop, 1);
 3587         }
 3588         if (nop != NULL)
 3589                 FREE((caddr_t)nop, M_NFSCLOPEN);
 3590         if (ndp != NULL) {
 3591                 /*
 3592                  * What should I do with the returned delegation, since the
 3593                  * delegation is being recalled? For now, just printf and
 3594                  * through it away.
 3595                  */
 3596                 printf("Moveopen returned deleg\n");
 3597                 FREE((caddr_t)ndp, M_NFSCLDELEG);
 3598         }
 3599         return (error);
 3600 }
 3601 
 3602 /*
 3603  * Recall all delegations on this client.
 3604  */
 3605 static void
 3606 nfscl_totalrecall(struct nfsclclient *clp)
 3607 {
 3608         struct nfscldeleg *dp;
 3609 
 3610         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
 3611                 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
 3612                         dp->nfsdl_flags |= NFSCLDL_RECALL;
 3613         }
 3614 }
 3615 
 3616 /*
 3617  * Relock byte ranges. Called for delegation recall and state expiry.
 3618  */
 3619 static int
 3620 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
 3621     struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
 3622     NFSPROC_T *p)
 3623 {
 3624         struct nfscllockowner *nlp;
 3625         struct nfsfh *nfhp;
 3626         u_int64_t off, len;
 3627         u_int32_t clidrev = 0;
 3628         int error, newone, donelocally;
 3629 
 3630         off = lop->nfslo_first;
 3631         len = lop->nfslo_end - lop->nfslo_first;
 3632         error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
 3633             clp, 1, NULL, 0, lp->nfsl_owner, lp->nfsl_openowner, &nlp, &newone,
 3634             &donelocally);
 3635         if (error || donelocally)
 3636                 return (error);
 3637         if (nmp->nm_clp != NULL)
 3638                 clidrev = nmp->nm_clp->nfsc_clientidrev;
 3639         else
 3640                 clidrev = 0;
 3641         nfhp = VTONFS(vp)->n_fhp;
 3642         error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
 3643             nfhp->nfh_len, nlp, newone, 0, off,
 3644             len, lop->nfslo_type, cred, p);
 3645         if (error)
 3646                 nfscl_freelockowner(nlp, 0);
 3647         return (error);
 3648 }
 3649 
 3650 /*
 3651  * Called to re-open a file. Basically get a vnode for the file handle
 3652  * and then call nfsrpc_openrpc() to do the rest.
 3653  */
 3654 static int
 3655 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
 3656     u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
 3657     struct ucred *cred, NFSPROC_T *p)
 3658 {
 3659         struct nfsnode *np;
 3660         vnode_t vp;
 3661         int error;
 3662 
 3663         error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
 3664         if (error)
 3665                 return (error);
 3666         vp = NFSTOV(np);
 3667         if (np->n_v4 != NULL) {
 3668                 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
 3669                     np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
 3670                     NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
 3671                     cred, p);
 3672         } else {
 3673                 error = EINVAL;
 3674         }
 3675         vrele(vp);
 3676         return (error);
 3677 }
 3678 
 3679 /*
 3680  * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
 3681  * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
 3682  * fail.
 3683  */
 3684 static int
 3685 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
 3686     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
 3687     u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
 3688     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
 3689 {
 3690         int error;
 3691 
 3692         do {
 3693                 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
 3694                     mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
 3695                     0, 0);
 3696                 if (error == NFSERR_DELAY)
 3697                         (void) nfs_catnap(PZERO, error, "nfstryop");
 3698         } while (error == NFSERR_DELAY);
 3699         if (error == EAUTH || error == EACCES) {
 3700                 /* Try again using system credentials */
 3701                 newnfs_setroot(cred);
 3702                 do {
 3703                     error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
 3704                         newfhlen, mode, op, name, namelen, ndpp, reclaim,
 3705                         delegtype, cred, p, 1, 0);
 3706                     if (error == NFSERR_DELAY)
 3707                         (void) nfs_catnap(PZERO, error, "nfstryop");
 3708                 } while (error == NFSERR_DELAY);
 3709         }
 3710         return (error);
 3711 }
 3712 
 3713 /*
 3714  * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
 3715  * NFSERR_DELAY. Also, retry with system credentials, if the provided
 3716  * cred don't work.
 3717  */
 3718 static int
 3719 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
 3720     int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
 3721     u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
 3722 {
 3723         struct nfsrv_descript nfsd, *nd = &nfsd;
 3724         int error;
 3725 
 3726         do {
 3727                 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
 3728                     reclaim, off, len, type, cred, p, 0);
 3729                 if (!error && nd->nd_repstat == NFSERR_DELAY)
 3730                         (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
 3731                             "nfstrylck");
 3732         } while (!error && nd->nd_repstat == NFSERR_DELAY);
 3733         if (!error)
 3734                 error = nd->nd_repstat;
 3735         if (error == EAUTH || error == EACCES) {
 3736                 /* Try again using root credentials */
 3737                 newnfs_setroot(cred);
 3738                 do {
 3739                         error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
 3740                             newone, reclaim, off, len, type, cred, p, 1);
 3741                         if (!error && nd->nd_repstat == NFSERR_DELAY)
 3742                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
 3743                                     "nfstrylck");
 3744                 } while (!error && nd->nd_repstat == NFSERR_DELAY);
 3745                 if (!error)
 3746                         error = nd->nd_repstat;
 3747         }
 3748         return (error);
 3749 }
 3750 
 3751 /*
 3752  * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
 3753  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
 3754  * credentials fail.
 3755  */
 3756 static int
 3757 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
 3758     struct nfsmount *nmp, NFSPROC_T *p)
 3759 {
 3760         int error;
 3761 
 3762         do {
 3763                 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
 3764                 if (error == NFSERR_DELAY)
 3765                         (void) nfs_catnap(PZERO, error, "nfstrydp");
 3766         } while (error == NFSERR_DELAY);
 3767         if (error == EAUTH || error == EACCES) {
 3768                 /* Try again using system credentials */
 3769                 newnfs_setroot(cred);
 3770                 do {
 3771                         error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
 3772                         if (error == NFSERR_DELAY)
 3773                                 (void) nfs_catnap(PZERO, error, "nfstrydp");
 3774                 } while (error == NFSERR_DELAY);
 3775         }
 3776         return (error);
 3777 }
 3778 
 3779 /*
 3780  * Try a close against the server. Just call nfsrpc_closerpc(),
 3781  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
 3782  * credentials fail.
 3783  */
 3784 APPLESTATIC int
 3785 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
 3786     struct nfsmount *nmp, NFSPROC_T *p)
 3787 {
 3788         struct nfsrv_descript nfsd, *nd = &nfsd;
 3789         int error;
 3790 
 3791         do {
 3792                 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
 3793                 if (error == NFSERR_DELAY)
 3794                         (void) nfs_catnap(PZERO, error, "nfstrycl");
 3795         } while (error == NFSERR_DELAY);
 3796         if (error == EAUTH || error == EACCES) {
 3797                 /* Try again using system credentials */
 3798                 newnfs_setroot(cred);
 3799                 do {
 3800                         error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
 3801                         if (error == NFSERR_DELAY)
 3802                                 (void) nfs_catnap(PZERO, error, "nfstrycl");
 3803                 } while (error == NFSERR_DELAY);
 3804         }
 3805         return (error);
 3806 }
 3807 
 3808 /*
 3809  * Decide if a delegation on a file permits close without flushing writes
 3810  * to the server. This might be a big performance win in some environments.
 3811  * (Not useful until the client does caching on local stable storage.)
 3812  */
 3813 APPLESTATIC int
 3814 nfscl_mustflush(vnode_t vp)
 3815 {
 3816         struct nfsclclient *clp;
 3817         struct nfscldeleg *dp;
 3818         struct nfsnode *np;
 3819         struct nfsmount *nmp;
 3820 
 3821         np = VTONFS(vp);
 3822         nmp = VFSTONFS(vnode_mount(vp));
 3823         if (!NFSHASNFSV4(nmp))
 3824                 return (1);
 3825         NFSLOCKCLSTATE();
 3826         clp = nfscl_findcl(nmp);
 3827         if (clp == NULL) {
 3828                 NFSUNLOCKCLSTATE();
 3829                 return (1);
 3830         }
 3831         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 3832         if (dp != NULL && (dp->nfsdl_flags &
 3833             (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
 3834              NFSCLDL_WRITE &&
 3835             (dp->nfsdl_sizelimit >= np->n_size ||
 3836              !NFSHASSTRICT3530(nmp))) {
 3837                 NFSUNLOCKCLSTATE();
 3838                 return (0);
 3839         }
 3840         NFSUNLOCKCLSTATE();
 3841         return (1);
 3842 }
 3843 
 3844 /*
 3845  * See if a (write) delegation exists for this file.
 3846  */
 3847 APPLESTATIC int
 3848 nfscl_nodeleg(vnode_t vp, int writedeleg)
 3849 {
 3850         struct nfsclclient *clp;
 3851         struct nfscldeleg *dp;
 3852         struct nfsnode *np;
 3853         struct nfsmount *nmp;
 3854 
 3855         np = VTONFS(vp);
 3856         nmp = VFSTONFS(vnode_mount(vp));
 3857         if (!NFSHASNFSV4(nmp))
 3858                 return (1);
 3859         NFSLOCKCLSTATE();
 3860         clp = nfscl_findcl(nmp);
 3861         if (clp == NULL) {
 3862                 NFSUNLOCKCLSTATE();
 3863                 return (1);
 3864         }
 3865         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 3866         if (dp != NULL &&
 3867             (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
 3868             (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
 3869              NFSCLDL_WRITE)) {
 3870                 NFSUNLOCKCLSTATE();
 3871                 return (0);
 3872         }
 3873         NFSUNLOCKCLSTATE();
 3874         return (1);
 3875 }
 3876 
 3877 /*
 3878  * Look for an associated delegation that should be DelegReturned.
 3879  */
 3880 APPLESTATIC int
 3881 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
 3882 {
 3883         struct nfsclclient *clp;
 3884         struct nfscldeleg *dp;
 3885         struct nfsclowner *owp;
 3886         struct nfscllockowner *lp;
 3887         struct nfsmount *nmp;
 3888         struct ucred *cred;
 3889         struct nfsnode *np;
 3890         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
 3891 
 3892         nmp = VFSTONFS(vnode_mount(vp));
 3893         np = VTONFS(vp);
 3894         NFSLOCKCLSTATE();
 3895         /*
 3896          * Loop around waiting for:
 3897          * - outstanding I/O operations on delegations to complete
 3898          * - for a delegation on vp that has state, lock the client and
 3899          *   do a recall
 3900          * - return delegation with no state
 3901          */
 3902         while (1) {
 3903                 clp = nfscl_findcl(nmp);
 3904                 if (clp == NULL) {
 3905                         NFSUNLOCKCLSTATE();
 3906                         return (retcnt);
 3907                 }
 3908                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
 3909                     np->n_fhp->nfh_len);
 3910                 if (dp != NULL) {
 3911                     /*
 3912                      * Wait for outstanding I/O ops to be done.
 3913                      */
 3914                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
 3915                         if (igotlock) {
 3916                             nfsv4_unlock(&clp->nfsc_lock, 0);
 3917                             igotlock = 0;
 3918                         }
 3919                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
 3920                         (void) nfsmsleep(&dp->nfsdl_rwlock,
 3921                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
 3922                         continue;
 3923                     }
 3924                     needsrecall = 0;
 3925                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 3926                         if (!LIST_EMPTY(&owp->nfsow_open)) {
 3927                             needsrecall = 1;
 3928                             break;
 3929                         }
 3930                     }
 3931                     if (!needsrecall) {
 3932                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 3933                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
 3934                                 needsrecall = 1;
 3935                                 break;
 3936                             }
 3937                         }
 3938                     }
 3939                     if (needsrecall && !triedrecall) {
 3940                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
 3941                         islept = 0;
 3942                         while (!igotlock) {
 3943                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
 3944                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
 3945                             if (islept)
 3946                                 break;
 3947                         }
 3948                         if (islept)
 3949                             continue;
 3950                         NFSUNLOCKCLSTATE();
 3951                         cred = newnfs_getcred();
 3952                         newnfs_copycred(&dp->nfsdl_cred, cred);
 3953                         (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
 3954                         NFSFREECRED(cred);
 3955                         triedrecall = 1;
 3956                         NFSLOCKCLSTATE();
 3957                         nfsv4_unlock(&clp->nfsc_lock, 0);
 3958                         igotlock = 0;
 3959                         continue;
 3960                     }
 3961                     *stp = dp->nfsdl_stateid;
 3962                     retcnt = 1;
 3963                     nfscl_cleandeleg(dp);
 3964                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
 3965                 }
 3966                 if (igotlock)
 3967                     nfsv4_unlock(&clp->nfsc_lock, 0);
 3968                 NFSUNLOCKCLSTATE();
 3969                 return (retcnt);
 3970         }
 3971 }
 3972 
 3973 /*
 3974  * Look for associated delegation(s) that should be DelegReturned.
 3975  */
 3976 APPLESTATIC int
 3977 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
 3978     nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
 3979 {
 3980         struct nfsclclient *clp;
 3981         struct nfscldeleg *dp;
 3982         struct nfsclowner *owp;
 3983         struct nfscllockowner *lp;
 3984         struct nfsmount *nmp;
 3985         struct ucred *cred;
 3986         struct nfsnode *np;
 3987         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
 3988 
 3989         nmp = VFSTONFS(vnode_mount(fvp));
 3990         *gotfdp = 0;
 3991         *gottdp = 0;
 3992         NFSLOCKCLSTATE();
 3993         /*
 3994          * Loop around waiting for:
 3995          * - outstanding I/O operations on delegations to complete
 3996          * - for a delegation on fvp that has state, lock the client and
 3997          *   do a recall
 3998          * - return delegation(s) with no state.
 3999          */
 4000         while (1) {
 4001                 clp = nfscl_findcl(nmp);
 4002                 if (clp == NULL) {
 4003                         NFSUNLOCKCLSTATE();
 4004                         return (retcnt);
 4005                 }
 4006                 np = VTONFS(fvp);
 4007                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
 4008                     np->n_fhp->nfh_len);
 4009                 if (dp != NULL && *gotfdp == 0) {
 4010                     /*
 4011                      * Wait for outstanding I/O ops to be done.
 4012                      */
 4013                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
 4014                         if (igotlock) {
 4015                             nfsv4_unlock(&clp->nfsc_lock, 0);
 4016                             igotlock = 0;
 4017                         }
 4018                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
 4019                         (void) nfsmsleep(&dp->nfsdl_rwlock,
 4020                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
 4021                         continue;
 4022                     }
 4023                     needsrecall = 0;
 4024                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 4025                         if (!LIST_EMPTY(&owp->nfsow_open)) {
 4026                             needsrecall = 1;
 4027                             break;
 4028                         }
 4029                     }
 4030                     if (!needsrecall) {
 4031                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 4032                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
 4033                                 needsrecall = 1;
 4034                                 break;
 4035                             }
 4036                         }
 4037                     }
 4038                     if (needsrecall && !triedrecall) {
 4039                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
 4040                         islept = 0;
 4041                         while (!igotlock) {
 4042                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
 4043                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
 4044                             if (islept)
 4045                                 break;
 4046                         }
 4047                         if (islept)
 4048                             continue;
 4049                         NFSUNLOCKCLSTATE();
 4050                         cred = newnfs_getcred();
 4051                         newnfs_copycred(&dp->nfsdl_cred, cred);
 4052                         (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
 4053                         NFSFREECRED(cred);
 4054                         triedrecall = 1;
 4055                         NFSLOCKCLSTATE();
 4056                         nfsv4_unlock(&clp->nfsc_lock, 0);
 4057                         igotlock = 0;
 4058                         continue;
 4059                     }
 4060                     *fstp = dp->nfsdl_stateid;
 4061                     retcnt++;
 4062                     *gotfdp = 1;
 4063                     nfscl_cleandeleg(dp);
 4064                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
 4065                 }
 4066                 if (igotlock) {
 4067                     nfsv4_unlock(&clp->nfsc_lock, 0);
 4068                     igotlock = 0;
 4069                 }
 4070                 if (tvp != NULL) {
 4071                     np = VTONFS(tvp);
 4072                     dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
 4073                         np->n_fhp->nfh_len);
 4074                     if (dp != NULL && *gottdp == 0) {
 4075                         /*
 4076                          * Wait for outstanding I/O ops to be done.
 4077                          */
 4078                         if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
 4079                             dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
 4080                             (void) nfsmsleep(&dp->nfsdl_rwlock,
 4081                                 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
 4082                             continue;
 4083                         }
 4084                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
 4085                             if (!LIST_EMPTY(&owp->nfsow_open)) {
 4086                                 NFSUNLOCKCLSTATE();
 4087                                 return (retcnt);
 4088                             }
 4089                         }
 4090                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
 4091                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
 4092                                 NFSUNLOCKCLSTATE();
 4093                                 return (retcnt);
 4094                             }
 4095                         }
 4096                         *tstp = dp->nfsdl_stateid;
 4097                         retcnt++;
 4098                         *gottdp = 1;
 4099                         nfscl_cleandeleg(dp);
 4100                         nfscl_freedeleg(&clp->nfsc_deleg, dp);
 4101                     }
 4102                 }
 4103                 NFSUNLOCKCLSTATE();
 4104                 return (retcnt);
 4105         }
 4106 }
 4107 
 4108 /*
 4109  * Get a reference on the clientid associated with the mount point.
 4110  * Return 1 if success, 0 otherwise.
 4111  */
 4112 APPLESTATIC int
 4113 nfscl_getref(struct nfsmount *nmp)
 4114 {
 4115         struct nfsclclient *clp;
 4116 
 4117         NFSLOCKCLSTATE();
 4118         clp = nfscl_findcl(nmp);
 4119         if (clp == NULL) {
 4120                 NFSUNLOCKCLSTATE();
 4121                 return (0);
 4122         }
 4123         nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
 4124         NFSUNLOCKCLSTATE();
 4125         return (1);
 4126 }
 4127 
 4128 /*
 4129  * Release a reference on a clientid acquired with the above call.
 4130  */
 4131 APPLESTATIC void
 4132 nfscl_relref(struct nfsmount *nmp)
 4133 {
 4134         struct nfsclclient *clp;
 4135 
 4136         NFSLOCKCLSTATE();
 4137         clp = nfscl_findcl(nmp);
 4138         if (clp == NULL) {
 4139                 NFSUNLOCKCLSTATE();
 4140                 return;
 4141         }
 4142         nfsv4_relref(&clp->nfsc_lock);
 4143         NFSUNLOCKCLSTATE();
 4144 }
 4145 
 4146 /*
 4147  * Save the size attribute in the delegation, since the nfsnode
 4148  * is going away.
 4149  */
 4150 APPLESTATIC void
 4151 nfscl_reclaimnode(vnode_t vp)
 4152 {
 4153         struct nfsclclient *clp;
 4154         struct nfscldeleg *dp;
 4155         struct nfsnode *np = VTONFS(vp);
 4156         struct nfsmount *nmp;
 4157 
 4158         nmp = VFSTONFS(vnode_mount(vp));
 4159         if (!NFSHASNFSV4(nmp))
 4160                 return;
 4161         NFSLOCKCLSTATE();
 4162         clp = nfscl_findcl(nmp);
 4163         if (clp == NULL) {
 4164                 NFSUNLOCKCLSTATE();
 4165                 return;
 4166         }
 4167         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 4168         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
 4169                 dp->nfsdl_size = np->n_size;
 4170         NFSUNLOCKCLSTATE();
 4171 }
 4172 
 4173 /*
 4174  * Get the saved size attribute in the delegation, since it is a
 4175  * newly allocated nfsnode.
 4176  */
 4177 APPLESTATIC void
 4178 nfscl_newnode(vnode_t vp)
 4179 {
 4180         struct nfsclclient *clp;
 4181         struct nfscldeleg *dp;
 4182         struct nfsnode *np = VTONFS(vp);
 4183         struct nfsmount *nmp;
 4184 
 4185         nmp = VFSTONFS(vnode_mount(vp));
 4186         if (!NFSHASNFSV4(nmp))
 4187                 return;
 4188         NFSLOCKCLSTATE();
 4189         clp = nfscl_findcl(nmp);
 4190         if (clp == NULL) {
 4191                 NFSUNLOCKCLSTATE();
 4192                 return;
 4193         }
 4194         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 4195         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
 4196                 np->n_size = dp->nfsdl_size;
 4197         NFSUNLOCKCLSTATE();
 4198 }
 4199 
 4200 /*
 4201  * If there is a valid write delegation for this file, set the modtime
 4202  * to the local clock time.
 4203  */
 4204 APPLESTATIC void
 4205 nfscl_delegmodtime(vnode_t vp)
 4206 {
 4207         struct nfsclclient *clp;
 4208         struct nfscldeleg *dp;
 4209         struct nfsnode *np = VTONFS(vp);
 4210         struct nfsmount *nmp;
 4211 
 4212         nmp = VFSTONFS(vnode_mount(vp));
 4213         if (!NFSHASNFSV4(nmp))
 4214                 return;
 4215         NFSLOCKCLSTATE();
 4216         clp = nfscl_findcl(nmp);
 4217         if (clp == NULL) {
 4218                 NFSUNLOCKCLSTATE();
 4219                 return;
 4220         }
 4221         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 4222         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
 4223                 NFSGETNANOTIME(&dp->nfsdl_modtime);
 4224                 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
 4225         }
 4226         NFSUNLOCKCLSTATE();
 4227 }
 4228 
 4229 /*
 4230  * If there is a valid write delegation for this file with a modtime set,
 4231  * put that modtime in mtime.
 4232  */
 4233 APPLESTATIC void
 4234 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
 4235 {
 4236         struct nfsclclient *clp;
 4237         struct nfscldeleg *dp;
 4238         struct nfsnode *np = VTONFS(vp);
 4239         struct nfsmount *nmp;
 4240 
 4241         nmp = VFSTONFS(vnode_mount(vp));
 4242         if (!NFSHASNFSV4(nmp))
 4243                 return;
 4244         NFSLOCKCLSTATE();
 4245         clp = nfscl_findcl(nmp);
 4246         if (clp == NULL) {
 4247                 NFSUNLOCKCLSTATE();
 4248                 return;
 4249         }
 4250         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
 4251         if (dp != NULL &&
 4252             (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
 4253             (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
 4254                 *mtime = dp->nfsdl_modtime;
 4255         NFSUNLOCKCLSTATE();
 4256 }
 4257 
 4258 static int
 4259 nfscl_errmap(struct nfsrv_descript *nd)
 4260 {
 4261         short *defaulterrp, *errp;
 4262 
 4263         if (!nd->nd_repstat)
 4264                 return (0);
 4265         if (nd->nd_procnum == NFSPROC_NOOP)
 4266                 return (txdr_unsigned(nd->nd_repstat & 0xffff));
 4267         if (nd->nd_repstat == EBADRPC)
 4268                 return (txdr_unsigned(NFSERR_BADXDR));
 4269         if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
 4270             nd->nd_repstat == NFSERR_OPILLEGAL)
 4271                 return (txdr_unsigned(nd->nd_repstat));
 4272         errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
 4273         while (*++errp)
 4274                 if (*errp == (short)nd->nd_repstat)
 4275                         return (txdr_unsigned(nd->nd_repstat));
 4276         return (txdr_unsigned(*defaulterrp));
 4277 }
 4278 

Cache object: 3395cce0e2775c217487aee6454595f1


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.