sys/fs/nfsclient/nfs_clstate.c

   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("$FreeBSD$");
  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  *   - The function nfscl_cleanup_common() is executed after a process exits.
  68  *     It goes 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 nfsstatsv1 nfsstatsv1;
  88 extern struct nfsreqhead nfsd_reqq;
  89 extern u_int32_t newnfs_false, newnfs_true;
  90 extern int nfscl_debuglevel;
  91 extern int nfscl_enablecallb;
  92 extern int nfs_numnfscbd;
  93 NFSREQSPINLOCK;
  94 NFSCLSTATEMUTEX;
  95 int nfscl_inited = 0;
  96 struct nfsclhead nfsclhead;     /* Head of clientid list */
  97 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
  98 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER;
  99 #endif  /* !APPLEKEXT */
 100
 101 static int nfscl_delegcnt = 0;
 102 static int nfscl_layoutcnt = 0;
 103 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *,
 104     u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **);
 105 static void nfscl_clrelease(struct nfsclclient *);
 106 static void nfscl_cleanclient(struct nfsclclient *);
 107 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
 108     struct ucred *, NFSPROC_T *);
 109 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
 110     struct nfsmount *, struct ucred *, NFSPROC_T *);
 111 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *);
 112 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
 113     struct nfscllock *, int);
 114 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
 115     struct nfscllock **, int);
 116 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
 117 static u_int32_t nfscl_nextcbident(void);
 118 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **);
 119 static struct nfsclclient *nfscl_getclnt(u_int32_t);
 120 static struct nfsclclient *nfscl_getclntsess(uint8_t *);
 121 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
 122     int);
 123 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *,
 124     int, struct nfsclrecalllayout **);
 125 static void nfscl_reldevinfo_locked(struct nfscldevinfo *);
 126 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *,
 127     int);
 128 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *);
 129 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
 130     u_int8_t *, struct nfscllock **);
 131 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
 132 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
 133     struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
 134 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
 135     struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
 136     struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *);
 137 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
 138     struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
 139     struct nfscldeleg *, struct ucred *, NFSPROC_T *);
 140 static void nfscl_totalrecall(struct nfsclclient *);
 141 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
 142     struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
 143 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
 144     u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
 145     struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
 146 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
 147     int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
 148     struct ucred *, NFSPROC_T *);
 149 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
 150     struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
 151 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *);
 152 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t);
 153 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
 154 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
 155     struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int);
 156 static void nfscl_freeopenowner(struct nfsclowner *, int);
 157 static void nfscl_cleandeleg(struct nfscldeleg *);
 158 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *,
 159     struct nfsmount *, NFSPROC_T *);
 160 static void nfscl_emptylockowner(struct nfscllockowner *,
 161     struct nfscllockownerfhhead *);
 162 static void nfscl_mergeflayouts(struct nfsclflayouthead *,
 163     struct nfsclflayouthead *);
 164 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t,
 165     uint64_t, uint32_t, struct nfsclrecalllayout *);
 166 static int nfscl_seq(uint32_t, uint32_t);
 167 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *,
 168     struct ucred *, NFSPROC_T *);
 169 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *,
 170     struct ucred *, NFSPROC_T *);
 171
 172 static short nfscberr_null[] = {
 173         0,
 174         0,
 175 };
 176
 177 static short nfscberr_getattr[] = {
 178         NFSERR_RESOURCE,
 179         NFSERR_BADHANDLE,
 180         NFSERR_BADXDR,
 181         NFSERR_RESOURCE,
 182         NFSERR_SERVERFAULT,
 183         0,
 184 };
 185
 186 static short nfscberr_recall[] = {
 187         NFSERR_RESOURCE,
 188         NFSERR_BADHANDLE,
 189         NFSERR_BADSTATEID,
 190         NFSERR_BADXDR,
 191         NFSERR_RESOURCE,
 192         NFSERR_SERVERFAULT,
 193         0,
 194 };
 195
 196 static short *nfscl_cberrmap[] = {
 197         nfscberr_null,
 198         nfscberr_null,
 199         nfscberr_null,
 200         nfscberr_getattr,
 201         nfscberr_recall
 202 };
 203
 204 #define NETFAMILY(clp) \
 205                 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
 206
 207 /*
 208  * Called for an open operation.
 209  * If the nfhp argument is NULL, just get an openowner.
 210  */
 211 APPLESTATIC int
 212 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
 213     struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
 214     struct nfsclopen **opp, int *newonep, int *retp, int lockit)
 215 {
 216         struct nfsclclient *clp;
 217         struct nfsclowner *owp, *nowp;
 218         struct nfsclopen *op = NULL, *nop = NULL;
 219         struct nfscldeleg *dp;
 220         struct nfsclownerhead *ohp;
 221         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 222         int ret;
 223
 224         if (newonep != NULL)
 225                 *newonep = 0;
 226         if (opp != NULL)
 227                 *opp = NULL;
 228         if (owpp != NULL)
 229                 *owpp = NULL;
 230
 231         /*
 232          * Might need one or both of these, so MALLOC them now, to
 233          * avoid a tsleep() in MALLOC later.
 234          */
 235         MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner),
 236             M_NFSCLOWNER, M_WAITOK);
 237         if (nfhp != NULL)
 238             MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
 239                 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
 240         ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
 241         if (ret != 0) {
 242                 FREE((caddr_t)nowp, M_NFSCLOWNER);
 243                 if (nop != NULL)
 244                         FREE((caddr_t)nop, M_NFSCLOPEN);
 245                 return (ret);
 246         }
 247
 248         /*
 249          * Get the Open iff it already exists.
 250          * If none found, add the new one or return error, depending upon
 251          * "create".
 252          */
 253         NFSLOCKCLSTATE();
 254         dp = NULL;
 255         /* First check the delegation list */
 256         if (nfhp != NULL && usedeleg) {
 257                 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
 258                         if (dp->nfsdl_fhlen == fhlen &&
 259                             !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
 260                                 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
 261                                     (dp->nfsdl_flags & NFSCLDL_WRITE))
 262                                         break;
 263                                 dp = NULL;
 264                                 break;
 265                         }
 266                 }
 267         }
 268
 269         if (dp != NULL) {
 270                 nfscl_filllockowner(p->td_proc, own, F_POSIX);
 271                 ohp = &dp->nfsdl_owner;
 272         } else {
 273                 /* For NFSv4.1 and this option, use a single open_owner. */
 274                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
 275                         nfscl_filllockowner(NULL, own, F_POSIX);
 276                 else
 277                         nfscl_filllockowner(p->td_proc, own, F_POSIX);
 278                 ohp = &clp->nfsc_owner;
 279         }
 280         /* Now, search for an openowner */
 281         LIST_FOREACH(owp, ohp, nfsow_list) {
 282                 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
 283                         break;
 284         }
 285
 286         /*
 287          * Create a new open, as required.
 288          */
 289         nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
 290             cred, newonep);
 291
 292         /*
 293          * Now, check the mode on the open and return the appropriate
 294          * value.
 295          */
 296         if (retp != NULL) {
 297                 if (nfhp != NULL && dp != NULL && nop == NULL)
 298                         /* new local open on delegation */
 299                         *retp = NFSCLOPEN_SETCRED;
 300                 else
 301                         *retp = NFSCLOPEN_OK;
 302         }
 303         if (op != NULL && (amode & ~(op->nfso_mode))) {
 304                 op->nfso_mode |= amode;
 305                 if (retp != NULL && dp == NULL)
 306                         *retp = NFSCLOPEN_DOOPEN;
 307         }
 308
 309         /*
 310          * Serialize modifications to the open owner for multiple threads
 311          * within the same process using a read/write sleep lock.
 312          * For NFSv4.1 and a single OpenOwner, allow concurrent open operations
 313          * by acquiring a shared lock.  The close operations still use an
 314          * exclusive lock for this case.
 315          */
 316         if (lockit != 0) {
 317                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) {
 318                         /*
 319                          * Get a shared lock on the OpenOwner, but first
 320                          * wait for any pending exclusive lock, so that the
 321                          * exclusive locker gets priority.
 322                          */
 323                         nfsv4_lock(&owp->nfsow_rwlock, 0, NULL,
 324                             NFSCLSTATEMUTEXPTR, NULL);
 325                         nfsv4_getref(&owp->nfsow_rwlock, NULL,
 326                             NFSCLSTATEMUTEXPTR, NULL);
 327                 } else
 328                         nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
 329         }
 330         NFSUNLOCKCLSTATE();
 331         if (nowp != NULL)
 332                 FREE((caddr_t)nowp, M_NFSCLOWNER);
 333         if (nop != NULL)
 334                 FREE((caddr_t)nop, M_NFSCLOPEN);
 335         if (owpp != NULL)
 336                 *owpp = owp;
 337         if (opp != NULL)
 338                 *opp = op;
 339         return (0);
 340 }
 341
 342 /*
 343  * Create a new open, as required.
 344  */
 345 static void
 346 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
 347     struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
 348     struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
 349     struct ucred *cred, int *newonep)
 350 {
 351         struct nfsclowner *owp = *owpp, *nowp;
 352         struct nfsclopen *op, *nop;
 353
 354         if (nowpp != NULL)
 355                 nowp = *nowpp;
 356         else
 357                 nowp = NULL;
 358         if (nopp != NULL)
 359                 nop = *nopp;
 360         else
 361                 nop = NULL;
 362         if (owp == NULL && nowp != NULL) {
 363                 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
 364                 LIST_INIT(&nowp->nfsow_open);
 365                 nowp->nfsow_clp = clp;
 366                 nowp->nfsow_seqid = 0;
 367                 nowp->nfsow_defunct = 0;
 368                 nfscl_lockinit(&nowp->nfsow_rwlock);
 369                 if (dp != NULL) {
 370                         nfsstatsv1.cllocalopenowners++;
 371                         LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
 372                 } else {
 373                         nfsstatsv1.clopenowners++;
 374                         LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
 375                 }
 376                 owp = *owpp = nowp;
 377                 *nowpp = NULL;
 378                 if (newonep != NULL)
 379                         *newonep = 1;
 380         }
 381
 382          /* If an fhp has been specified, create an Open as well. */
 383         if (fhp != NULL) {
 384                 /* and look for the correct open, based upon FH */
 385                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 386                         if (op->nfso_fhlen == fhlen &&
 387                             !NFSBCMP(op->nfso_fh, fhp, fhlen))
 388                                 break;
 389                 }
 390                 if (op == NULL && nop != NULL) {
 391                         nop->nfso_own = owp;
 392                         nop->nfso_mode = 0;
 393                         nop->nfso_opencnt = 0;
 394                         nop->nfso_posixlock = 1;
 395                         nop->nfso_fhlen = fhlen;
 396                         NFSBCOPY(fhp, nop->nfso_fh, fhlen);
 397                         LIST_INIT(&nop->nfso_lock);
 398                         nop->nfso_stateid.seqid = 0;
 399                         nop->nfso_stateid.other[0] = 0;
 400                         nop->nfso_stateid.other[1] = 0;
 401                         nop->nfso_stateid.other[2] = 0;
 402                         KASSERT(cred != NULL, ("%s: cred NULL\n", __func__));
 403                         newnfs_copyincred(cred, &nop->nfso_cred);
 404                         if (dp != NULL) {
 405                                 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
 406                                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
 407                                     nfsdl_list);
 408                                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
 409                                 nfsstatsv1.cllocalopens++;
 410                         } else {
 411                                 nfsstatsv1.clopens++;
 412                         }
 413                         LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
 414                         *opp = nop;
 415                         *nopp = NULL;
 416                         if (newonep != NULL)
 417                                 *newonep = 1;
 418                 } else {
 419                         *opp = op;
 420                 }
 421         }
 422 }
 423
 424 /*
 425  * Called to find/add a delegation to a client.
 426  */
 427 APPLESTATIC int
 428 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
 429     int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
 430 {
 431         struct nfscldeleg *dp = *dpp, *tdp;
 432
 433         /*
 434          * First, if we have received a Read delegation for a file on a
 435          * read/write file system, just return it, because they aren't
 436          * useful, imho.
 437          */
 438         if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) &&
 439             (dp->nfsdl_flags & NFSCLDL_READ)) {
 440                 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p);
 441                 FREE((caddr_t)dp, M_NFSCLDELEG);
 442                 *dpp = NULL;
 443                 return (0);
 444         }
 445
 446         /* Look for the correct deleg, based upon FH */
 447         NFSLOCKCLSTATE();
 448         tdp = nfscl_finddeleg(clp, nfhp, fhlen);
 449         if (tdp == NULL) {
 450                 if (dp == NULL) {
 451                         NFSUNLOCKCLSTATE();
 452                         return (NFSERR_BADSTATEID);
 453                 }
 454                 *dpp = NULL;
 455                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
 456                 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
 457                     nfsdl_hash);
 458                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
 459                 nfsstatsv1.cldelegates++;
 460                 nfscl_delegcnt++;
 461         } else {
 462                 /*
 463                  * Delegation already exists, what do we do if a new one??
 464                  */
 465                 if (dp != NULL) {
 466                         printf("Deleg already exists!\n");
 467                         FREE((caddr_t)dp, M_NFSCLDELEG);
 468                         *dpp = NULL;
 469                 } else {
 470                         *dpp = tdp;
 471                 }
 472         }
 473         NFSUNLOCKCLSTATE();
 474         return (0);
 475 }
 476
 477 /*
 478  * Find a delegation for this file handle. Return NULL upon failure.
 479  */
 480 static struct nfscldeleg *
 481 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
 482 {
 483         struct nfscldeleg *dp;
 484
 485         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
 486             if (dp->nfsdl_fhlen == fhlen &&
 487                 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
 488                 break;
 489         }
 490         return (dp);
 491 }
 492
 493 /*
 494  * Get a stateid for an I/O operation. First, look for an open and iff
 495  * found, return either a lockowner stateid or the open stateid.
 496  * If no Open is found, just return error and the special stateid of all zeros.
 497  */
 498 APPLESTATIC int
 499 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
 500     int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
 501     void **lckpp)
 502 {
 503         struct nfsclclient *clp;
 504         struct nfsclowner *owp;
 505         struct nfsclopen *op = NULL, *top;
 506         struct nfscllockowner *lp;
 507         struct nfscldeleg *dp;
 508         struct nfsnode *np;
 509         struct nfsmount *nmp;
 510         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 511         int error, done;
 512
 513         *lckpp = NULL;
 514         /*
 515          * Initially, just set the special stateid of all zeros.
 516          * (Don't do this for a DS, since the special stateid can't be used.)
 517          */
 518         if (fords == 0) {
 519                 stateidp->seqid = 0;
 520                 stateidp->other[0] = 0;
 521                 stateidp->other[1] = 0;
 522                 stateidp->other[2] = 0;
 523         }
 524         if (vnode_vtype(vp) != VREG)
 525                 return (EISDIR);
 526         np = VTONFS(vp);
 527         nmp = VFSTONFS(vnode_mount(vp));
 528         NFSLOCKCLSTATE();
 529         clp = nfscl_findcl(nmp);
 530         if (clp == NULL) {
 531                 NFSUNLOCKCLSTATE();
 532                 return (EACCES);
 533         }
 534
 535         /*
 536          * Wait for recovery to complete.
 537          */
 538         while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
 539                 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
 540                     PZERO, "nfsrecvr", NULL);
 541
 542         /*
 543          * First, look for a delegation.
 544          */
 545         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
 546                 if (dp->nfsdl_fhlen == fhlen &&
 547                     !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
 548                         if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
 549                             (dp->nfsdl_flags & NFSCLDL_WRITE)) {
 550                                 stateidp->seqid = dp->nfsdl_stateid.seqid;
 551                                 stateidp->other[0] = dp->nfsdl_stateid.other[0];
 552                                 stateidp->other[1] = dp->nfsdl_stateid.other[1];
 553                                 stateidp->other[2] = dp->nfsdl_stateid.other[2];
 554                                 if (!(np->n_flag & NDELEGRECALL)) {
 555                                         TAILQ_REMOVE(&clp->nfsc_deleg, dp,
 556                                             nfsdl_list);
 557                                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
 558                                             nfsdl_list);
 559                                         dp->nfsdl_timestamp = NFSD_MONOSEC +
 560                                             120;
 561                                         dp->nfsdl_rwlock.nfslock_usecnt++;
 562                                         *lckpp = (void *)&dp->nfsdl_rwlock;
 563                                 }
 564                                 NFSUNLOCKCLSTATE();
 565                                 return (0);
 566                         }
 567                         break;
 568                 }
 569         }
 570
 571         if (p != NULL) {
 572                 /*
 573                  * If p != NULL, we want to search the parentage tree
 574                  * for a matching OpenOwner and use that.
 575                  */
 576                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
 577                         nfscl_filllockowner(NULL, own, F_POSIX);
 578                 else
 579                         nfscl_filllockowner(p->td_proc, own, F_POSIX);
 580                 lp = NULL;
 581                 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own,
 582                     mode, &lp, &op);
 583                 if (error == 0 && lp != NULL && fords == 0) {
 584                         /* Don't return a lock stateid for a DS. */
 585                         stateidp->seqid =
 586                             lp->nfsl_stateid.seqid;
 587                         stateidp->other[0] =
 588                             lp->nfsl_stateid.other[0];
 589                         stateidp->other[1] =
 590                             lp->nfsl_stateid.other[1];
 591                         stateidp->other[2] =
 592                             lp->nfsl_stateid.other[2];
 593                         NFSUNLOCKCLSTATE();
 594                         return (0);
 595                 }
 596         }
 597         if (op == NULL) {
 598                 /* If not found, just look for any OpenOwner that will work. */
 599                 top = NULL;
 600                 done = 0;
 601                 owp = LIST_FIRST(&clp->nfsc_owner);
 602                 while (!done && owp != NULL) {
 603                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 604                                 if (op->nfso_fhlen == fhlen &&
 605                                     !NFSBCMP(op->nfso_fh, nfhp, fhlen)) {
 606                                         if (top == NULL && (op->nfso_mode &
 607                                             NFSV4OPEN_ACCESSWRITE) != 0 &&
 608                                             (mode & NFSV4OPEN_ACCESSREAD) != 0)
 609                                                 top = op;
 610                                         if ((mode & op->nfso_mode) == mode) {
 611                                                 done = 1;
 612                                                 break;
 613                                         }
 614                                 }
 615                         }
 616                         if (!done)
 617                                 owp = LIST_NEXT(owp, nfsow_list);
 618                 }
 619                 if (!done) {
 620                         NFSCL_DEBUG(2, "openmode top=%p\n", top);
 621                         if (top == NULL || NFSHASOPENMODE(nmp)) {
 622                                 NFSUNLOCKCLSTATE();
 623                                 return (ENOENT);
 624                         } else
 625                                 op = top;
 626                 }
 627                 /*
 628                  * For read aheads or write behinds, use the open cred.
 629                  * A read ahead or write behind is indicated by p == NULL.
 630                  */
 631                 if (p == NULL)
 632                         newnfs_copycred(&op->nfso_cred, cred);
 633         }
 634
 635         /*
 636          * No lock stateid, so return the open stateid.
 637          */
 638         stateidp->seqid = op->nfso_stateid.seqid;
 639         stateidp->other[0] = op->nfso_stateid.other[0];
 640         stateidp->other[1] = op->nfso_stateid.other[1];
 641         stateidp->other[2] = op->nfso_stateid.other[2];
 642         NFSUNLOCKCLSTATE();
 643         return (0);
 644 }
 645
 646 /*
 647  * Search for a matching file, mode and, optionally, lockowner.
 648  */
 649 static int
 650 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen,
 651     u_int8_t *openown, u_int8_t *lockown, u_int32_t mode,
 652     struct nfscllockowner **lpp, struct nfsclopen **opp)
 653 {
 654         struct nfsclowner *owp;
 655         struct nfsclopen *op, *rop, *rop2;
 656         struct nfscllockowner *lp;
 657         int keep_looping;
 658
 659         if (lpp != NULL)
 660                 *lpp = NULL;
 661         /*
 662          * rop will be set to the open to be returned. There are three
 663          * variants of this, all for an open of the correct file:
 664          * 1 - A match of lockown.
 665          * 2 - A match of the openown, when no lockown match exists.
 666          * 3 - A match for any open, if no openown or lockown match exists.
 667          * Looking for #2 over #3 probably isn't necessary, but since
 668          * RFC3530 is vague w.r.t. the relationship between openowners and
 669          * lockowners, I think this is the safer way to go.
 670          */
 671         rop = NULL;
 672         rop2 = NULL;
 673         keep_looping = 1;
 674         /* Search the client list */
 675         owp = LIST_FIRST(ohp);
 676         while (owp != NULL && keep_looping != 0) {
 677                 /* and look for the correct open */
 678                 op = LIST_FIRST(&owp->nfsow_open);
 679                 while (op != NULL && keep_looping != 0) {
 680                         if (op->nfso_fhlen == fhlen &&
 681                             !NFSBCMP(op->nfso_fh, nfhp, fhlen)
 682                             && (op->nfso_mode & mode) == mode) {
 683                                 if (lpp != NULL) {
 684                                         /* Now look for a matching lockowner. */
 685                                         LIST_FOREACH(lp, &op->nfso_lock,
 686                                             nfsl_list) {
 687                                                 if (!NFSBCMP(lp->nfsl_owner,
 688                                                     lockown,
 689                                                     NFSV4CL_LOCKNAMELEN)) {
 690                                                         *lpp = lp;
 691                                                         rop = op;
 692                                                         keep_looping = 0;
 693                                                         break;
 694                                                 }
 695                                         }
 696                                 }
 697                                 if (rop == NULL && !NFSBCMP(owp->nfsow_owner,
 698                                     openown, NFSV4CL_LOCKNAMELEN)) {
 699                                         rop = op;
 700                                         if (lpp == NULL)
 701                                                 keep_looping = 0;
 702                                 }
 703                                 if (rop2 == NULL)
 704                                         rop2 = op;
 705                         }
 706                         op = LIST_NEXT(op, nfso_list);
 707                 }
 708                 owp = LIST_NEXT(owp, nfsow_list);
 709         }
 710         if (rop == NULL)
 711                 rop = rop2;
 712         if (rop == NULL)
 713                 return (EBADF);
 714         *opp = rop;
 715         return (0);
 716 }
 717
 718 /*
 719  * Release use of an open owner. Called when open operations are done
 720  * with the open owner.
 721  */
 722 APPLESTATIC void
 723 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp,
 724     __unused int error, __unused int candelete, int unlocked)
 725 {
 726
 727         if (owp == NULL)
 728                 return;
 729         NFSLOCKCLSTATE();
 730         if (unlocked == 0) {
 731                 if (NFSHASONEOPENOWN(nmp))
 732                         nfsv4_relref(&owp->nfsow_rwlock);
 733                 else
 734                         nfscl_lockunlock(&owp->nfsow_rwlock);
 735         }
 736         nfscl_clrelease(owp->nfsow_clp);
 737         NFSUNLOCKCLSTATE();
 738 }
 739
 740 /*
 741  * Release use of an open structure under an open owner.
 742  */
 743 APPLESTATIC void
 744 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error,
 745     int candelete)
 746 {
 747         struct nfsclclient *clp;
 748         struct nfsclowner *owp;
 749
 750         if (op == NULL)
 751                 return;
 752         NFSLOCKCLSTATE();
 753         owp = op->nfso_own;
 754         if (NFSHASONEOPENOWN(nmp))
 755                 nfsv4_relref(&owp->nfsow_rwlock);
 756         else
 757                 nfscl_lockunlock(&owp->nfsow_rwlock);
 758         clp = owp->nfsow_clp;
 759         if (error && candelete && op->nfso_opencnt == 0)
 760                 nfscl_freeopen(op, 0);
 761         nfscl_clrelease(clp);
 762         NFSUNLOCKCLSTATE();
 763 }
 764
 765 /*
 766  * Called to get a clientid structure. It will optionally lock the
 767  * client data structures to do the SetClientId/SetClientId_confirm,
 768  * but will release that lock and return the clientid with a reference
 769  * count on it.
 770  * If the "cred" argument is NULL, a new clientid should not be created.
 771  * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
 772  * be done.
 773  * The start_renewthread argument tells nfscl_getcl() to start a renew
 774  * thread if this creates a new clp.
 775  * It always clpp with a reference count on it, unless returning an error.
 776  */
 777 APPLESTATIC int
 778 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p,
 779     int start_renewthread, struct nfsclclient **clpp)
 780 {
 781         struct nfsclclient *clp;
 782         struct nfsclclient *newclp = NULL;
 783         struct nfsmount *nmp;
 784         char uuid[HOSTUUIDLEN];
 785         int igotlock = 0, error, trystalecnt, clidinusedelay, i;
 786         u_int16_t idlen = 0;
 787
 788         nmp = VFSTONFS(mp);
 789         if (cred != NULL) {
 790                 getcredhostuuid(cred, uuid, sizeof uuid);
 791                 idlen = strlen(uuid);
 792                 if (idlen > 0)
 793                         idlen += sizeof (u_int64_t);
 794                 else
 795                         idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
 796                 MALLOC(newclp, struct nfsclclient *,
 797                     sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
 798                     M_WAITOK | M_ZERO);
 799         }
 800         NFSLOCKCLSTATE();
 801         /*
 802          * If a forced dismount is already in progress, don't
 803          * allocate a new clientid and get out now. For the case where
 804          * clp != NULL, this is a harmless optimization.
 805          */
 806         if (NFSCL_FORCEDISM(mp)) {
 807                 NFSUNLOCKCLSTATE();
 808                 if (newclp != NULL)
 809                         free(newclp, M_NFSCLCLIENT);
 810                 return (EBADF);
 811         }
 812         clp = nmp->nm_clp;
 813         if (clp == NULL) {
 814                 if (newclp == NULL) {
 815                         NFSUNLOCKCLSTATE();
 816                         return (EACCES);
 817                 }
 818                 clp = newclp;
 819                 clp->nfsc_idlen = idlen;
 820                 LIST_INIT(&clp->nfsc_owner);
 821                 TAILQ_INIT(&clp->nfsc_deleg);
 822                 TAILQ_INIT(&clp->nfsc_layout);
 823                 LIST_INIT(&clp->nfsc_devinfo);
 824                 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
 825                         LIST_INIT(&clp->nfsc_deleghash[i]);
 826                 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
 827                         LIST_INIT(&clp->nfsc_layouthash[i]);
 828                 clp->nfsc_flags = NFSCLFLAGS_INITED;
 829                 clp->nfsc_clientidrev = 1;
 830                 clp->nfsc_cbident = nfscl_nextcbident();
 831                 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
 832                     clp->nfsc_idlen);
 833                 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
 834                 nmp->nm_clp = clp;
 835                 clp->nfsc_nmp = nmp;
 836                 NFSUNLOCKCLSTATE();
 837                 if (start_renewthread != 0)
 838                         nfscl_start_renewthread(clp);
 839         } else {
 840                 NFSUNLOCKCLSTATE();
 841                 if (newclp != NULL)
 842                         free(newclp, M_NFSCLCLIENT);
 843         }
 844         NFSLOCKCLSTATE();
 845         while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
 846             !NFSCL_FORCEDISM(mp))
 847                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
 848                     NFSCLSTATEMUTEXPTR, mp);
 849         if (igotlock == 0) {
 850                 /*
 851                  * Call nfsv4_lock() with "iwantlock == 0" so that it will
 852                  * wait for a pending exclusive lock request.  This gives the
 853                  * exclusive lock request priority over this shared lock
 854                  * request.
 855                  * An exclusive lock on nfsc_lock is used mainly for server
 856                  * crash recoveries.
 857                  */
 858                 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp);
 859                 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
 860         }
 861         if (igotlock == 0 && NFSCL_FORCEDISM(mp)) {
 862                 /*
 863                  * Both nfsv4_lock() and nfsv4_getref() know to check
 864                  * for NFSCL_FORCEDISM() and return without sleeping to
 865                  * wait for the exclusive lock to be released, since it
 866                  * might be held by nfscl_umount() and we need to get out
 867                  * now for that case and not wait until nfscl_umount()
 868                  * releases it.
 869                  */
 870                 NFSUNLOCKCLSTATE();
 871                 return (EBADF);
 872         }
 873         NFSUNLOCKCLSTATE();
 874
 875         /*
 876          * If it needs a clientid, do the setclientid now.
 877          */
 878         if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
 879                 if (!igotlock)
 880                         panic("nfscl_clget");
 881                 if (p == NULL || cred == NULL) {
 882                         NFSLOCKCLSTATE();
 883                         nfsv4_unlock(&clp->nfsc_lock, 0);
 884                         NFSUNLOCKCLSTATE();
 885                         return (EACCES);
 886                 }
 887                 /*
 888                  * If RFC3530 Sec. 14.2.33 is taken literally,
 889                  * NFSERR_CLIDINUSE will be returned persistently for the
 890                  * case where a new mount of the same file system is using
 891                  * a different principal. In practice, NFSERR_CLIDINUSE is
 892                  * only returned when there is outstanding unexpired state
 893                  * on the clientid. As such, try for twice the lease
 894                  * interval, if we know what that is. Otherwise, make a
 895                  * wild ass guess.
 896                  * The case of returning NFSERR_STALECLIENTID is far less
 897                  * likely, but might occur if there is a significant delay
 898                  * between doing the SetClientID and SetClientIDConfirm Ops,
 899                  * such that the server throws away the clientid before
 900                  * receiving the SetClientIDConfirm.
 901                  */
 902                 if (clp->nfsc_renew > 0)
 903                         clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
 904                 else
 905                         clidinusedelay = 120;
 906                 trystalecnt = 3;
 907                 do {
 908                         error = nfsrpc_setclient(nmp, clp, 0, cred, p);
 909                         if (error == NFSERR_STALECLIENTID ||
 910                             error == NFSERR_STALEDONTRECOVER ||
 911                             error == NFSERR_BADSESSION ||
 912                             error == NFSERR_CLIDINUSE) {
 913                                 (void) nfs_catnap(PZERO, error, "nfs_setcl");
 914                         }
 915                 } while (((error == NFSERR_STALECLIENTID ||
 916                      error == NFSERR_BADSESSION ||
 917                      error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
 918                     (error == NFSERR_CLIDINUSE && --clidinusedelay > 0));
 919                 if (error) {
 920                         NFSLOCKCLSTATE();
 921                         nfsv4_unlock(&clp->nfsc_lock, 0);
 922                         NFSUNLOCKCLSTATE();
 923                         return (error);
 924                 }
 925                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
 926         }
 927         if (igotlock) {
 928                 NFSLOCKCLSTATE();
 929                 nfsv4_unlock(&clp->nfsc_lock, 1);
 930                 NFSUNLOCKCLSTATE();
 931         }
 932
 933         *clpp = clp;
 934         return (0);
 935 }
 936
 937 /*
 938  * Get a reference to a clientid and return it, if valid.
 939  */
 940 APPLESTATIC struct nfsclclient *
 941 nfscl_findcl(struct nfsmount *nmp)
 942 {
 943         struct nfsclclient *clp;
 944
 945         clp = nmp->nm_clp;
 946         if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
 947                 return (NULL);
 948         return (clp);
 949 }
 950
 951 /*
 952  * Release the clientid structure. It may be locked or reference counted.
 953  */
 954 static void
 955 nfscl_clrelease(struct nfsclclient *clp)
 956 {
 957
 958         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
 959                 nfsv4_unlock(&clp->nfsc_lock, 0);
 960         else
 961                 nfsv4_relref(&clp->nfsc_lock);
 962 }
 963
 964 /*
 965  * External call for nfscl_clrelease.
 966  */
 967 APPLESTATIC void
 968 nfscl_clientrelease(struct nfsclclient *clp)
 969 {
 970
 971         NFSLOCKCLSTATE();
 972         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
 973                 nfsv4_unlock(&clp->nfsc_lock, 0);
 974         else
 975                 nfsv4_relref(&clp->nfsc_lock);
 976         NFSUNLOCKCLSTATE();
 977 }
 978
 979 /*
 980  * Called when wanting to lock a byte region.
 981  */
 982 APPLESTATIC int
 983 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
 984     short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
 985     int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
 986     struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
 987 {
 988         struct nfscllockowner *lp;
 989         struct nfsclopen *op;
 990         struct nfsclclient *clp;
 991         struct nfscllockowner *nlp;
 992         struct nfscllock *nlop, *otherlop;
 993         struct nfscldeleg *dp = NULL, *ldp = NULL;
 994         struct nfscllockownerhead *lhp = NULL;
 995         struct nfsnode *np;
 996         u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
 997         u_int8_t *openownp;
 998         int error = 0, ret, donelocally = 0;
 999         u_int32_t mode;
1000
1001         /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
1002         mode = 0;
1003         np = VTONFS(vp);
1004         *lpp = NULL;
1005         lp = NULL;
1006         *newonep = 0;
1007         *donelocallyp = 0;
1008
1009         /*
1010          * Might need these, so MALLOC them now, to
1011          * avoid a tsleep() in MALLOC later.
1012          */
1013         MALLOC(nlp, struct nfscllockowner *,
1014             sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
1015         MALLOC(otherlop, struct nfscllock *,
1016             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1017         MALLOC(nlop, struct nfscllock *,
1018             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1019         nlop->nfslo_type = type;
1020         nlop->nfslo_first = off;
1021         if (len == NFS64BITSSET) {
1022                 nlop->nfslo_end = NFS64BITSSET;
1023         } else {
1024                 nlop->nfslo_end = off + len;
1025                 if (nlop->nfslo_end <= nlop->nfslo_first)
1026                         error = NFSERR_INVAL;
1027         }
1028
1029         if (!error) {
1030                 if (recovery)
1031                         clp = rclp;
1032                 else
1033                         error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
1034         }
1035         if (error) {
1036                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1037                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1038                 FREE((caddr_t)nlop, M_NFSCLLOCK);
1039                 return (error);
1040         }
1041
1042         op = NULL;
1043         if (recovery) {
1044                 ownp = rownp;
1045                 openownp = ropenownp;
1046         } else {
1047                 nfscl_filllockowner(id, own, flags);
1048                 ownp = own;
1049                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
1050                         nfscl_filllockowner(NULL, openown, F_POSIX);
1051                 else
1052                         nfscl_filllockowner(p->td_proc, openown, F_POSIX);
1053                 openownp = openown;
1054         }
1055         if (!recovery) {
1056                 NFSLOCKCLSTATE();
1057                 /*
1058                  * First, search for a delegation. If one exists for this file,
1059                  * the lock can be done locally against it, so long as there
1060                  * isn't a local lock conflict.
1061                  */
1062                 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1063                     np->n_fhp->nfh_len);
1064                 /* Just sanity check for correct type of delegation */
1065                 if (dp != NULL && ((dp->nfsdl_flags &
1066                     (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
1067                      (type == F_WRLCK &&
1068                       (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
1069                         dp = NULL;
1070         }
1071         if (dp != NULL) {
1072                 /* Now, find an open and maybe a lockowner. */
1073                 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh,
1074                     np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
1075                 if (ret)
1076                         ret = nfscl_getopen(&clp->nfsc_owner,
1077                             np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1078                             ownp, mode, NULL, &op);
1079                 if (!ret) {
1080                         lhp = &dp->nfsdl_lock;
1081                         TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
1082                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
1083                         dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
1084                         donelocally = 1;
1085                 } else {
1086                         dp = NULL;
1087                 }
1088         }
1089         if (!donelocally) {
1090                 /*
1091                  * Get the related Open and maybe lockowner.
1092                  */
1093                 error = nfscl_getopen(&clp->nfsc_owner,
1094                     np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1095                     ownp, mode, &lp, &op);
1096                 if (!error)
1097                         lhp = &op->nfso_lock;
1098         }
1099         if (!error && !recovery)
1100                 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1101                     np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1102         if (error) {
1103                 if (!recovery) {
1104                         nfscl_clrelease(clp);
1105                         NFSUNLOCKCLSTATE();
1106                 }
1107                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1108                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1109                 FREE((caddr_t)nlop, M_NFSCLLOCK);
1110                 return (error);
1111         }
1112
1113         /*
1114          * Ok, see if a lockowner exists and create one, as required.
1115          */
1116         if (lp == NULL)
1117                 LIST_FOREACH(lp, lhp, nfsl_list) {
1118                         if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1119                                 break;
1120                 }
1121         if (lp == NULL) {
1122                 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1123                 if (recovery)
1124                         NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1125                             NFSV4CL_LOCKNAMELEN);
1126                 else
1127                         NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1128                             NFSV4CL_LOCKNAMELEN);
1129                 nlp->nfsl_seqid = 0;
1130                 nlp->nfsl_lockflags = flags;
1131                 nlp->nfsl_inprog = NULL;
1132                 nfscl_lockinit(&nlp->nfsl_rwlock);
1133                 LIST_INIT(&nlp->nfsl_lock);
1134                 if (donelocally) {
1135                         nlp->nfsl_open = NULL;
1136                         nfsstatsv1.cllocallockowners++;
1137                 } else {
1138                         nlp->nfsl_open = op;
1139                         nfsstatsv1.cllockowners++;
1140                 }
1141                 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1142                 lp = nlp;
1143                 nlp = NULL;
1144                 *newonep = 1;
1145         }
1146
1147         /*
1148          * Now, update the byte ranges for locks.
1149          */
1150         ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1151         if (!ret)
1152                 donelocally = 1;
1153         if (donelocally) {
1154                 *donelocallyp = 1;
1155                 if (!recovery)
1156                         nfscl_clrelease(clp);
1157         } else {
1158                 /*
1159                  * Serial modifications on the lock owner for multiple threads
1160                  * for the same process using a read/write lock.
1161                  */
1162                 if (!recovery)
1163                         nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1164         }
1165         if (!recovery)
1166                 NFSUNLOCKCLSTATE();
1167
1168         if (nlp)
1169                 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1170         if (nlop)
1171                 FREE((caddr_t)nlop, M_NFSCLLOCK);
1172         if (otherlop)
1173                 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1174
1175         *lpp = lp;
1176         return (0);
1177 }
1178
1179 /*
1180  * Called to unlock a byte range, for LockU.
1181  */
1182 APPLESTATIC int
1183 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1184     __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1185     struct nfsclclient *clp, void *id, int flags,
1186     struct nfscllockowner **lpp, int *dorpcp)
1187 {
1188         struct nfscllockowner *lp;
1189         struct nfsclowner *owp;
1190         struct nfsclopen *op;
1191         struct nfscllock *nlop, *other_lop = NULL;
1192         struct nfscldeleg *dp;
1193         struct nfsnode *np;
1194         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1195         int ret = 0, fnd;
1196
1197         np = VTONFS(vp);
1198         *lpp = NULL;
1199         *dorpcp = 0;
1200
1201         /*
1202          * Might need these, so MALLOC them now, to
1203          * avoid a tsleep() in MALLOC later.
1204          */
1205         MALLOC(nlop, struct nfscllock *,
1206             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1207         nlop->nfslo_type = F_UNLCK;
1208         nlop->nfslo_first = off;
1209         if (len == NFS64BITSSET) {
1210                 nlop->nfslo_end = NFS64BITSSET;
1211         } else {
1212                 nlop->nfslo_end = off + len;
1213                 if (nlop->nfslo_end <= nlop->nfslo_first) {
1214                         FREE((caddr_t)nlop, M_NFSCLLOCK);
1215                         return (NFSERR_INVAL);
1216                 }
1217         }
1218         if (callcnt == 0) {
1219                 MALLOC(other_lop, struct nfscllock *,
1220                     sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1221                 *other_lop = *nlop;
1222         }
1223         nfscl_filllockowner(id, own, flags);
1224         dp = NULL;
1225         NFSLOCKCLSTATE();
1226         if (callcnt == 0)
1227                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1228                     np->n_fhp->nfh_len);
1229
1230         /*
1231          * First, unlock any local regions on a delegation.
1232          */
1233         if (dp != NULL) {
1234                 /* Look for this lockowner. */
1235                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1236                         if (!NFSBCMP(lp->nfsl_owner, own,
1237                             NFSV4CL_LOCKNAMELEN))
1238                                 break;
1239                 }
1240                 if (lp != NULL)
1241                         /* Use other_lop, so nlop is still available */
1242                         (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1243         }
1244
1245         /*
1246          * Now, find a matching open/lockowner that hasn't already been done,
1247          * as marked by nfsl_inprog.
1248          */
1249         lp = NULL;
1250         fnd = 0;
1251         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1252             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1253                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1254                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1255                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1256                         if (lp->nfsl_inprog == NULL &&
1257                             !NFSBCMP(lp->nfsl_owner, own,
1258                              NFSV4CL_LOCKNAMELEN)) {
1259                                 fnd = 1;
1260                                 break;
1261                         }
1262                     }
1263                     if (fnd)
1264                         break;
1265                 }
1266             }
1267             if (fnd)
1268                 break;
1269         }
1270
1271         if (lp != NULL) {
1272                 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1273                 if (ret)
1274                         *dorpcp = 1;
1275                 /*
1276                  * Serial modifications on the lock owner for multiple
1277                  * threads for the same process using a read/write lock.
1278                  */
1279                 lp->nfsl_inprog = p;
1280                 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1281                 *lpp = lp;
1282         }
1283         NFSUNLOCKCLSTATE();
1284         if (nlop)
1285                 FREE((caddr_t)nlop, M_NFSCLLOCK);
1286         if (other_lop)
1287                 FREE((caddr_t)other_lop, M_NFSCLLOCK);
1288         return (0);
1289 }
1290
1291 /*
1292  * Release all lockowners marked in progess for this process and file.
1293  */
1294 APPLESTATIC void
1295 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1296     void *id, int flags)
1297 {
1298         struct nfsclowner *owp;
1299         struct nfsclopen *op;
1300         struct nfscllockowner *lp;
1301         struct nfsnode *np;
1302         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1303
1304         np = VTONFS(vp);
1305         nfscl_filllockowner(id, own, flags);
1306         NFSLOCKCLSTATE();
1307         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1308             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1309                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1310                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1311                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1312                         if (lp->nfsl_inprog == p &&
1313                             !NFSBCMP(lp->nfsl_owner, own,
1314                             NFSV4CL_LOCKNAMELEN)) {
1315                             lp->nfsl_inprog = NULL;
1316                             nfscl_lockunlock(&lp->nfsl_rwlock);
1317                         }
1318                     }
1319                 }
1320             }
1321         }
1322         nfscl_clrelease(clp);
1323         NFSUNLOCKCLSTATE();
1324 }
1325
1326 /*
1327  * Called to find out if any bytes within the byte range specified are
1328  * write locked by the calling process. Used to determine if flushing
1329  * is required before a LockU.
1330  * If in doubt, return 1, so the flush will occur.
1331  */
1332 APPLESTATIC int
1333 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1334     struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1335 {
1336         struct nfsclowner *owp;
1337         struct nfscllockowner *lp;
1338         struct nfsclopen *op;
1339         struct nfsclclient *clp;
1340         struct nfscllock *lop;
1341         struct nfscldeleg *dp;
1342         struct nfsnode *np;
1343         u_int64_t off, end;
1344         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1345         int error = 0;
1346
1347         np = VTONFS(vp);
1348         switch (fl->l_whence) {
1349         case SEEK_SET:
1350         case SEEK_CUR:
1351                 /*
1352                  * Caller is responsible for adding any necessary offset
1353                  * when SEEK_CUR is used.
1354                  */
1355                 off = fl->l_start;
1356                 break;
1357         case SEEK_END:
1358                 off = np->n_size + fl->l_start;
1359                 break;
1360         default:
1361                 return (1);
1362         }
1363         if (fl->l_len != 0) {
1364                 end = off + fl->l_len;
1365                 if (end < off)
1366                         return (1);
1367         } else {
1368                 end = NFS64BITSSET;
1369         }
1370
1371         error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
1372         if (error)
1373                 return (1);
1374         nfscl_filllockowner(id, own, flags);
1375         NFSLOCKCLSTATE();
1376
1377         /*
1378          * First check the delegation locks.
1379          */
1380         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1381         if (dp != NULL) {
1382                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1383                         if (!NFSBCMP(lp->nfsl_owner, own,
1384                             NFSV4CL_LOCKNAMELEN))
1385                                 break;
1386                 }
1387                 if (lp != NULL) {
1388                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1389                                 if (lop->nfslo_first >= end)
1390                                         break;
1391                                 if (lop->nfslo_end <= off)
1392                                         continue;
1393                                 if (lop->nfslo_type == F_WRLCK) {
1394                                         nfscl_clrelease(clp);
1395                                         NFSUNLOCKCLSTATE();
1396                                         return (1);
1397                                 }
1398                         }
1399                 }
1400         }
1401
1402         /*
1403          * Now, check state against the server.
1404          */
1405         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1406             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1407                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1408                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1409                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1410                         if (!NFSBCMP(lp->nfsl_owner, own,
1411                             NFSV4CL_LOCKNAMELEN))
1412                             break;
1413                     }
1414                     if (lp != NULL) {
1415                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1416                             if (lop->nfslo_first >= end)
1417                                 break;
1418                             if (lop->nfslo_end <= off)
1419                                 continue;
1420                             if (lop->nfslo_type == F_WRLCK) {
1421                                 nfscl_clrelease(clp);
1422                                 NFSUNLOCKCLSTATE();
1423                                 return (1);
1424                             }
1425                         }
1426                     }
1427                 }
1428             }
1429         }
1430         nfscl_clrelease(clp);
1431         NFSUNLOCKCLSTATE();
1432         return (0);
1433 }
1434
1435 /*
1436  * Release a byte range lock owner structure.
1437  */
1438 APPLESTATIC void
1439 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1440 {
1441         struct nfsclclient *clp;
1442
1443         if (lp == NULL)
1444                 return;
1445         NFSLOCKCLSTATE();
1446         clp = lp->nfsl_open->nfso_own->nfsow_clp;
1447         if (error != 0 && candelete &&
1448             (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1449                 nfscl_freelockowner(lp, 0);
1450         else
1451                 nfscl_lockunlock(&lp->nfsl_rwlock);
1452         nfscl_clrelease(clp);
1453         NFSUNLOCKCLSTATE();
1454 }
1455
1456 /*
1457  * Free up an open structure and any associated byte range lock structures.
1458  */
1459 APPLESTATIC void
1460 nfscl_freeopen(struct nfsclopen *op, int local)
1461 {
1462
1463         LIST_REMOVE(op, nfso_list);
1464         nfscl_freealllocks(&op->nfso_lock, local);
1465         FREE((caddr_t)op, M_NFSCLOPEN);
1466         if (local)
1467                 nfsstatsv1.cllocalopens--;
1468         else
1469                 nfsstatsv1.clopens--;
1470 }
1471
1472 /*
1473  * Free up all lock owners and associated locks.
1474  */
1475 static void
1476 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1477 {
1478         struct nfscllockowner *lp, *nlp;
1479
1480         LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1481                 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1482                         panic("nfscllckw");
1483                 nfscl_freelockowner(lp, local);
1484         }
1485 }
1486
1487 /*
1488  * Called for an Open when NFSERR_EXPIRED is received from the server.
1489  * If there are no byte range locks nor a Share Deny lost, try to do a
1490  * fresh Open. Otherwise, free the open.
1491  */
1492 static int
1493 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1494     struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1495 {
1496         struct nfscllockowner *lp;
1497         struct nfscldeleg *dp;
1498         int mustdelete = 0, error;
1499
1500         /*
1501          * Look for any byte range lock(s).
1502          */
1503         LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1504                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1505                         mustdelete = 1;
1506                         break;
1507                 }
1508         }
1509
1510         /*
1511          * If no byte range lock(s) nor a Share deny, try to re-open.
1512          */
1513         if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1514                 newnfs_copycred(&op->nfso_cred, cred);
1515                 dp = NULL;
1516                 error = nfsrpc_reopen(nmp, op->nfso_fh,
1517                     op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1518                 if (error) {
1519                         mustdelete = 1;
1520                         if (dp != NULL) {
1521                                 FREE((caddr_t)dp, M_NFSCLDELEG);
1522                                 dp = NULL;
1523                         }
1524                 }
1525                 if (dp != NULL)
1526                         nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1527                             op->nfso_fhlen, cred, p, &dp);
1528         }
1529
1530         /*
1531          * If a byte range lock or Share deny or couldn't re-open, free it.
1532          */
1533         if (mustdelete)
1534                 nfscl_freeopen(op, 0);
1535         return (mustdelete);
1536 }
1537
1538 /*
1539  * Free up an open owner structure.
1540  */
1541 static void
1542 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1543 {
1544
1545         LIST_REMOVE(owp, nfsow_list);
1546         FREE((caddr_t)owp, M_NFSCLOWNER);
1547         if (local)
1548                 nfsstatsv1.cllocalopenowners--;
1549         else
1550                 nfsstatsv1.clopenowners--;
1551 }
1552
1553 /*
1554  * Free up a byte range lock owner structure.
1555  */
1556 APPLESTATIC void
1557 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1558 {
1559         struct nfscllock *lop, *nlop;
1560
1561         LIST_REMOVE(lp, nfsl_list);
1562         LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1563                 nfscl_freelock(lop, local);
1564         }
1565         FREE((caddr_t)lp, M_NFSCLLOCKOWNER);
1566         if (local)
1567                 nfsstatsv1.cllocallockowners--;
1568         else
1569                 nfsstatsv1.cllockowners--;
1570 }
1571
1572 /*
1573  * Free up a byte range lock structure.
1574  */
1575 APPLESTATIC void
1576 nfscl_freelock(struct nfscllock *lop, int local)
1577 {
1578
1579         LIST_REMOVE(lop, nfslo_list);
1580         FREE((caddr_t)lop, M_NFSCLLOCK);
1581         if (local)
1582                 nfsstatsv1.cllocallocks--;
1583         else
1584                 nfsstatsv1.cllocks--;
1585 }
1586
1587 /*
1588  * Clean out the state related to a delegation.
1589  */
1590 static void
1591 nfscl_cleandeleg(struct nfscldeleg *dp)
1592 {
1593         struct nfsclowner *owp, *nowp;
1594         struct nfsclopen *op;
1595
1596         LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1597                 op = LIST_FIRST(&owp->nfsow_open);
1598                 if (op != NULL) {
1599                         if (LIST_NEXT(op, nfso_list) != NULL)
1600                                 panic("nfscleandel");
1601                         nfscl_freeopen(op, 1);
1602                 }
1603                 nfscl_freeopenowner(owp, 1);
1604         }
1605         nfscl_freealllocks(&dp->nfsdl_lock, 1);
1606 }
1607
1608 /*
1609  * Free a delegation.
1610  */
1611 static void
1612 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp)
1613 {
1614
1615         TAILQ_REMOVE(hdp, dp, nfsdl_list);
1616         LIST_REMOVE(dp, nfsdl_hash);
1617         FREE((caddr_t)dp, M_NFSCLDELEG);
1618         nfsstatsv1.cldelegates--;
1619         nfscl_delegcnt--;
1620 }
1621
1622 /*
1623  * Free up all state related to this client structure.
1624  */
1625 static void
1626 nfscl_cleanclient(struct nfsclclient *clp)
1627 {
1628         struct nfsclowner *owp, *nowp;
1629         struct nfsclopen *op, *nop;
1630         struct nfscllayout *lyp, *nlyp;
1631         struct nfscldevinfo *dip, *ndip;
1632
1633         TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
1634                 nfscl_freelayout(lyp);
1635
1636         LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip)
1637                 nfscl_freedevinfo(dip);
1638
1639         /* Now, all the OpenOwners, etc. */
1640         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1641                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1642                         nfscl_freeopen(op, 0);
1643                 }
1644                 nfscl_freeopenowner(owp, 0);
1645         }
1646 }
1647
1648 /*
1649  * Called when an NFSERR_EXPIRED is received from the server.
1650  */
1651 static void
1652 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1653     struct ucred *cred, NFSPROC_T *p)
1654 {
1655         struct nfsclowner *owp, *nowp, *towp;
1656         struct nfsclopen *op, *nop, *top;
1657         struct nfscldeleg *dp, *ndp;
1658         int ret, printed = 0;
1659
1660         /*
1661          * First, merge locally issued Opens into the list for the server.
1662          */
1663         dp = TAILQ_FIRST(&clp->nfsc_deleg);
1664         while (dp != NULL) {
1665             ndp = TAILQ_NEXT(dp, nfsdl_list);
1666             owp = LIST_FIRST(&dp->nfsdl_owner);
1667             while (owp != NULL) {
1668                 nowp = LIST_NEXT(owp, nfsow_list);
1669                 op = LIST_FIRST(&owp->nfsow_open);
1670                 if (op != NULL) {
1671                     if (LIST_NEXT(op, nfso_list) != NULL)
1672                         panic("nfsclexp");
1673                     LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1674                         if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1675                             NFSV4CL_LOCKNAMELEN))
1676                             break;
1677                     }
1678                     if (towp != NULL) {
1679                         /* Merge opens in */
1680                         LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1681                             if (top->nfso_fhlen == op->nfso_fhlen &&
1682                                 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1683                                  op->nfso_fhlen)) {
1684                                 top->nfso_mode |= op->nfso_mode;
1685                                 top->nfso_opencnt += op->nfso_opencnt;
1686                                 break;
1687                             }
1688                         }
1689                         if (top == NULL) {
1690                             /* Just add the open to the owner list */
1691                             LIST_REMOVE(op, nfso_list);
1692                             op->nfso_own = towp;
1693                             LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1694                             nfsstatsv1.cllocalopens--;
1695                             nfsstatsv1.clopens++;
1696                         }
1697                     } else {
1698                         /* Just add the openowner to the client list */
1699                         LIST_REMOVE(owp, nfsow_list);
1700                         owp->nfsow_clp = clp;
1701                         LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1702                         nfsstatsv1.cllocalopenowners--;
1703                         nfsstatsv1.clopenowners++;
1704                         nfsstatsv1.cllocalopens--;
1705                         nfsstatsv1.clopens++;
1706                     }
1707                 }
1708                 owp = nowp;
1709             }
1710             if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1711                 printed = 1;
1712                 printf("nfsv4 expired locks lost\n");
1713             }
1714             nfscl_cleandeleg(dp);
1715             nfscl_freedeleg(&clp->nfsc_deleg, dp);
1716             dp = ndp;
1717         }
1718         if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1719             panic("nfsclexp");
1720
1721         /*
1722          * Now, try and reopen against the server.
1723          */
1724         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1725                 owp->nfsow_seqid = 0;
1726                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1727                         ret = nfscl_expireopen(clp, op, nmp, cred, p);
1728                         if (ret && !printed) {
1729                                 printed = 1;
1730                                 printf("nfsv4 expired locks lost\n");
1731                         }
1732                 }
1733                 if (LIST_EMPTY(&owp->nfsow_open))
1734                         nfscl_freeopenowner(owp, 0);
1735         }
1736 }
1737
1738 /*
1739  * This function must be called after the process represented by "own" has
1740  * exited. Must be called with CLSTATE lock held.
1741  */
1742 static void
1743 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1744 {
1745         struct nfsclowner *owp, *nowp;
1746         struct nfscllockowner *lp, *nlp;
1747         struct nfscldeleg *dp;
1748
1749         /* First, get rid of local locks on delegations. */
1750         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1751                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1752                     if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1753                         if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1754                             panic("nfscllckw");
1755                         nfscl_freelockowner(lp, 1);
1756                     }
1757                 }
1758         }
1759         owp = LIST_FIRST(&clp->nfsc_owner);
1760         while (owp != NULL) {
1761                 nowp = LIST_NEXT(owp, nfsow_list);
1762                 if (!NFSBCMP(owp->nfsow_owner, own,
1763                     NFSV4CL_LOCKNAMELEN)) {
1764                         /*
1765                          * If there are children that haven't closed the
1766                          * file descriptors yet, the opens will still be
1767                          * here. For that case, let the renew thread clear
1768                          * out the OpenOwner later.
1769                          */
1770                         if (LIST_EMPTY(&owp->nfsow_open))
1771                                 nfscl_freeopenowner(owp, 0);
1772                         else
1773                                 owp->nfsow_defunct = 1;
1774                 }
1775                 owp = nowp;
1776         }
1777 }
1778
1779 /*
1780  * Find open/lock owners for processes that have exited.
1781  */
1782 static void
1783 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1784 {
1785         struct nfsclowner *owp, *nowp;
1786         struct nfsclopen *op;
1787         struct nfscllockowner *lp, *nlp;
1788         struct nfscldeleg *dp;
1789
1790         NFSPROCLISTLOCK();
1791         NFSLOCKCLSTATE();
1792         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1793                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1794                         LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1795                                 if (LIST_EMPTY(&lp->nfsl_lock))
1796                                         nfscl_emptylockowner(lp, lhp);
1797                         }
1798                 }
1799                 if (nfscl_procdoesntexist(owp->nfsow_owner))
1800                         nfscl_cleanup_common(clp, owp->nfsow_owner);
1801         }
1802
1803         /*
1804          * For the single open_owner case, these lock owners need to be
1805          * checked to see if they still exist separately.
1806          * This is because nfscl_procdoesntexist() never returns true for
1807          * the single open_owner so that the above doesn't ever call
1808          * nfscl_cleanup_common().
1809          */
1810         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1811                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1812                         if (nfscl_procdoesntexist(lp->nfsl_owner))
1813                                 nfscl_cleanup_common(clp, lp->nfsl_owner);
1814                 }
1815         }
1816         NFSUNLOCKCLSTATE();
1817         NFSPROCLISTUNLOCK();
1818 }
1819
1820 /*
1821  * Take the empty lock owner and move it to the local lhp list if the
1822  * associated process no longer exists.
1823  */
1824 static void
1825 nfscl_emptylockowner(struct nfscllockowner *lp,
1826     struct nfscllockownerfhhead *lhp)
1827 {
1828         struct nfscllockownerfh *lfhp, *mylfhp;
1829         struct nfscllockowner *nlp;
1830         int fnd_it;
1831
1832         /* If not a Posix lock owner, just return. */
1833         if ((lp->nfsl_lockflags & F_POSIX) == 0)
1834                 return;
1835
1836         fnd_it = 0;
1837         mylfhp = NULL;
1838         /*
1839          * First, search to see if this lock owner is already in the list.
1840          * If it is, then the associated process no longer exists.
1841          */
1842         SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
1843                 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
1844                     !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
1845                     lfhp->nfslfh_len))
1846                         mylfhp = lfhp;
1847                 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
1848                         if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
1849                             NFSV4CL_LOCKNAMELEN))
1850                                 fnd_it = 1;
1851         }
1852         /* If not found, check if process still exists. */
1853         if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
1854                 return;
1855
1856         /* Move the lock owner over to the local list. */
1857         if (mylfhp == NULL) {
1858                 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
1859                     M_NOWAIT);
1860                 if (mylfhp == NULL)
1861                         return;
1862                 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
1863                 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
1864                     mylfhp->nfslfh_len);
1865                 LIST_INIT(&mylfhp->nfslfh_lock);
1866                 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
1867         }
1868         LIST_REMOVE(lp, nfsl_list);
1869         LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
1870 }
1871
1872 static int      fake_global;    /* Used to force visibility of MNTK_UNMOUNTF */
1873 /*
1874  * Called from nfs umount to free up the clientid.
1875  */
1876 APPLESTATIC void
1877 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
1878 {
1879         struct nfsclclient *clp;
1880         struct ucred *cred;
1881         int igotlock;
1882
1883         /*
1884          * For the case that matters, this is the thread that set
1885          * MNTK_UNMOUNTF, so it will see it set. The code that follows is
1886          * done to ensure that any thread executing nfscl_getcl() after
1887          * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
1888          * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
1889          * explanation, courtesy of Alan Cox.
1890          * What follows is a snippet from Alan Cox's email at:
1891          * http://docs.FreeBSD.org/cgi/
1892          *     mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
1893          *
1894          * 1. Set MNTK_UNMOUNTF
1895          * 2. Acquire a standard FreeBSD mutex "m".
1896          * 3. Update some data structures.
1897          * 4. Release mutex "m".
1898          *
1899          * Then, other threads that acquire "m" after step 4 has occurred will
1900          * see MNTK_UNMOUNTF as set.  But, other threads that beat thread X to
1901          * step 2 may or may not see MNTK_UNMOUNTF as set.
1902          */
1903         NFSLOCKCLSTATE();
1904         if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
1905                 fake_global++;
1906                 NFSUNLOCKCLSTATE();
1907                 NFSLOCKCLSTATE();
1908         }
1909
1910         clp = nmp->nm_clp;
1911         if (clp != NULL) {
1912                 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
1913                         panic("nfscl umount");
1914
1915                 /*
1916                  * First, handshake with the nfscl renew thread, to terminate
1917                  * it.
1918                  */
1919                 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
1920                 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
1921                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
1922                             "nfsclumnt", hz);
1923
1924                 /*
1925                  * Now, get the exclusive lock on the client state, so
1926                  * that no uses of the state are still in progress.
1927                  */
1928                 do {
1929                         igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1930                             NFSCLSTATEMUTEXPTR, NULL);
1931                 } while (!igotlock);
1932                 NFSUNLOCKCLSTATE();
1933
1934                 /*
1935                  * Free up all the state. It will expire on the server, but
1936                  * maybe we should do a SetClientId/SetClientIdConfirm so
1937                  * the server throws it away?
1938                  */
1939                 LIST_REMOVE(clp, nfsc_list);
1940                 nfscl_delegreturnall(clp, p);
1941                 cred = newnfs_getcred();
1942                 if (NFSHASNFSV4N(nmp)) {
1943                         (void)nfsrpc_destroysession(nmp, clp, cred, p);
1944                         (void)nfsrpc_destroyclient(nmp, clp, cred, p);
1945                 } else
1946                         (void)nfsrpc_setclient(nmp, clp, 0, cred, p);
1947                 nfscl_cleanclient(clp);
1948                 nmp->nm_clp = NULL;
1949                 NFSFREECRED(cred);
1950                 free(clp, M_NFSCLCLIENT);
1951         } else
1952                 NFSUNLOCKCLSTATE();
1953 }
1954
1955 /*
1956  * This function is called when a server replies with NFSERR_STALECLIENTID
1957  * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
1958  * doing Opens and Locks with reclaim. If these fail, it deletes the
1959  * corresponding state.
1960  */
1961 static void
1962 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
1963 {
1964         struct nfsclowner *owp, *nowp;
1965         struct nfsclopen *op, *nop;
1966         struct nfscllockowner *lp, *nlp;
1967         struct nfscllock *lop, *nlop;
1968         struct nfscldeleg *dp, *ndp, *tdp;
1969         struct nfsmount *nmp;
1970         struct ucred *tcred;
1971         struct nfsclopenhead extra_open;
1972         struct nfscldeleghead extra_deleg;
1973         struct nfsreq *rep;
1974         u_int64_t len;
1975         u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
1976         int i, igotlock = 0, error, trycnt, firstlock;
1977         struct nfscllayout *lyp, *nlyp;
1978
1979         /*
1980          * First, lock the client structure, so everyone else will
1981          * block when trying to use state.
1982          */
1983         NFSLOCKCLSTATE();
1984         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
1985         do {
1986                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1987                     NFSCLSTATEMUTEXPTR, NULL);
1988         } while (!igotlock);
1989         NFSUNLOCKCLSTATE();
1990
1991         nmp = clp->nfsc_nmp;
1992         if (nmp == NULL)
1993                 panic("nfscl recover");
1994
1995         /*
1996          * For now, just get rid of all layouts. There may be a need
1997          * to do LayoutCommit Ops with reclaim == true later.
1998          */
1999         TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
2000                 nfscl_freelayout(lyp);
2001         TAILQ_INIT(&clp->nfsc_layout);
2002         for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
2003                 LIST_INIT(&clp->nfsc_layouthash[i]);
2004
2005         trycnt = 5;
2006         do {
2007                 error = nfsrpc_setclient(nmp, clp, 1, cred, p);
2008         } while ((error == NFSERR_STALECLIENTID ||
2009              error == NFSERR_BADSESSION ||
2010              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2011         if (error) {
2012                 NFSLOCKCLSTATE();
2013                 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
2014                     NFSCLFLAGS_RECVRINPROG);
2015                 wakeup(&clp->nfsc_flags);
2016                 nfsv4_unlock(&clp->nfsc_lock, 0);
2017                 NFSUNLOCKCLSTATE();
2018                 return;
2019         }
2020         clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2021         clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2022
2023         /*
2024          * Mark requests already queued on the server, so that they don't
2025          * initiate another recovery cycle. Any requests already in the
2026          * queue that handle state information will have the old stale
2027          * clientid/stateid and will get a NFSERR_STALESTATEID,
2028          * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
2029          * This will be translated to NFSERR_STALEDONTRECOVER when
2030          * R_DONTRECOVER is set.
2031          */
2032         NFSLOCKREQ();
2033         TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
2034                 if (rep->r_nmp == nmp)
2035                         rep->r_flags |= R_DONTRECOVER;
2036         }
2037         NFSUNLOCKREQ();
2038
2039         /*
2040          * Now, mark all delegations "need reclaim".
2041          */
2042         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
2043                 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
2044
2045         TAILQ_INIT(&extra_deleg);
2046         LIST_INIT(&extra_open);
2047         /*
2048          * Now traverse the state lists, doing Open and Lock Reclaims.
2049          */
2050         tcred = newnfs_getcred();
2051         owp = LIST_FIRST(&clp->nfsc_owner);
2052         while (owp != NULL) {
2053             nowp = LIST_NEXT(owp, nfsow_list);
2054             owp->nfsow_seqid = 0;
2055             op = LIST_FIRST(&owp->nfsow_open);
2056             while (op != NULL) {
2057                 nop = LIST_NEXT(op, nfso_list);
2058                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2059                     /* Search for a delegation to reclaim with the open */
2060                     TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2061                         if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2062                             continue;
2063                         if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2064                             mode = NFSV4OPEN_ACCESSWRITE;
2065                             delegtype = NFSV4OPEN_DELEGATEWRITE;
2066                         } else {
2067                             mode = NFSV4OPEN_ACCESSREAD;
2068                             delegtype = NFSV4OPEN_DELEGATEREAD;
2069                         }
2070                         if ((op->nfso_mode & mode) == mode &&
2071                             op->nfso_fhlen == dp->nfsdl_fhlen &&
2072                             !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
2073                             break;
2074                     }
2075                     ndp = dp;
2076                     if (dp == NULL)
2077                         delegtype = NFSV4OPEN_DELEGATENONE;
2078                     newnfs_copycred(&op->nfso_cred, tcred);
2079                     error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
2080                         op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
2081                         op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
2082                         tcred, p);
2083                     if (!error) {
2084                         /* Handle any replied delegation */
2085                         if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
2086                             || NFSMNT_RDONLY(nmp->nm_mountp))) {
2087                             if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
2088                                 mode = NFSV4OPEN_ACCESSWRITE;
2089                             else
2090                                 mode = NFSV4OPEN_ACCESSREAD;
2091                             TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2092                                 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2093                                     continue;
2094                                 if ((op->nfso_mode & mode) == mode &&
2095                                     op->nfso_fhlen == dp->nfsdl_fhlen &&
2096                                     !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
2097                                     op->nfso_fhlen)) {
2098                                     dp->nfsdl_stateid = ndp->nfsdl_stateid;
2099                                     dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
2100                                     dp->nfsdl_ace = ndp->nfsdl_ace;
2101                                     dp->nfsdl_change = ndp->nfsdl_change;
2102                                     dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2103                                     if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
2104                                         dp->nfsdl_flags |= NFSCLDL_RECALL;
2105                                     FREE((caddr_t)ndp, M_NFSCLDELEG);
2106                                     ndp = NULL;
2107                                     break;
2108                                 }
2109                             }
2110                         }
2111                         if (ndp != NULL)
2112                             TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
2113
2114                         /* and reclaim all byte range locks */
2115                         lp = LIST_FIRST(&op->nfso_lock);
2116                         while (lp != NULL) {
2117                             nlp = LIST_NEXT(lp, nfsl_list);
2118                             lp->nfsl_seqid = 0;
2119                             firstlock = 1;
2120                             lop = LIST_FIRST(&lp->nfsl_lock);
2121                             while (lop != NULL) {
2122                                 nlop = LIST_NEXT(lop, nfslo_list);
2123                                 if (lop->nfslo_end == NFS64BITSSET)
2124                                     len = NFS64BITSSET;
2125                                 else
2126                                     len = lop->nfslo_end - lop->nfslo_first;
2127                                 error = nfscl_trylock(nmp, NULL,
2128                                     op->nfso_fh, op->nfso_fhlen, lp,
2129                                     firstlock, 1, lop->nfslo_first, len,
2130                                     lop->nfslo_type, tcred, p);
2131                                 if (error != 0)
2132                                     nfscl_freelock(lop, 0);
2133                                 else
2134                                     firstlock = 0;
2135                                 lop = nlop;
2136                             }
2137                             /* If no locks, but a lockowner, just delete it. */
2138                             if (LIST_EMPTY(&lp->nfsl_lock))
2139                                 nfscl_freelockowner(lp, 0);
2140                             lp = nlp;
2141                         }
2142                     }
2143                 }
2144                 if (error != 0 && error != NFSERR_BADSESSION)
2145                     nfscl_freeopen(op, 0);
2146                 op = nop;
2147             }
2148             owp = nowp;
2149         }
2150
2151         /*
2152          * Now, try and get any delegations not yet reclaimed by cobbling
2153          * to-gether an appropriate open.
2154          */
2155         nowp = NULL;
2156         dp = TAILQ_FIRST(&clp->nfsc_deleg);
2157         while (dp != NULL) {
2158             ndp = TAILQ_NEXT(dp, nfsdl_list);
2159             if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2160                 if (nowp == NULL) {
2161                     MALLOC(nowp, struct nfsclowner *,
2162                         sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2163                     /*
2164                      * Name must be as long an largest possible
2165                      * NFSV4CL_LOCKNAMELEN. 12 for now.
2166                      */
2167                     NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2168                         NFSV4CL_LOCKNAMELEN);
2169                     LIST_INIT(&nowp->nfsow_open);
2170                     nowp->nfsow_clp = clp;
2171                     nowp->nfsow_seqid = 0;
2172                     nowp->nfsow_defunct = 0;
2173                     nfscl_lockinit(&nowp->nfsow_rwlock);
2174                 }
2175                 nop = NULL;
2176                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2177                     MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
2178                         dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2179                     nop->nfso_own = nowp;
2180                     if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2181                         nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2182                         delegtype = NFSV4OPEN_DELEGATEWRITE;
2183                     } else {
2184                         nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2185                         delegtype = NFSV4OPEN_DELEGATEREAD;
2186                     }
2187                     nop->nfso_opencnt = 0;
2188                     nop->nfso_posixlock = 1;
2189                     nop->nfso_fhlen = dp->nfsdl_fhlen;
2190                     NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2191                     LIST_INIT(&nop->nfso_lock);
2192                     nop->nfso_stateid.seqid = 0;
2193                     nop->nfso_stateid.other[0] = 0;
2194                     nop->nfso_stateid.other[1] = 0;
2195                     nop->nfso_stateid.other[2] = 0;
2196                     newnfs_copycred(&dp->nfsdl_cred, tcred);
2197                     newnfs_copyincred(tcred, &nop->nfso_cred);
2198                     tdp = NULL;
2199                     error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2200                         nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2201                         nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2202                         delegtype, tcred, p);
2203                     if (tdp != NULL) {
2204                         if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2205                             mode = NFSV4OPEN_ACCESSWRITE;
2206                         else
2207                             mode = NFSV4OPEN_ACCESSREAD;
2208                         if ((nop->nfso_mode & mode) == mode &&
2209                             nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2210                             !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2211                             nop->nfso_fhlen)) {
2212                             dp->nfsdl_stateid = tdp->nfsdl_stateid;
2213                             dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2214                             dp->nfsdl_ace = tdp->nfsdl_ace;
2215                             dp->nfsdl_change = tdp->nfsdl_change;
2216                             dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2217                             if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2218                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
2219                             FREE((caddr_t)tdp, M_NFSCLDELEG);
2220                         } else {
2221                             TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2222                         }
2223                     }
2224                 }
2225                 if (error) {
2226                     if (nop != NULL)
2227                         FREE((caddr_t)nop, M_NFSCLOPEN);
2228                     /*
2229                      * Couldn't reclaim it, so throw the state
2230                      * away. Ouch!!
2231                      */
2232                     nfscl_cleandeleg(dp);
2233                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
2234                 } else {
2235                     LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2236                 }
2237             }
2238             dp = ndp;
2239         }
2240
2241         /*
2242          * Now, get rid of extra Opens and Delegations.
2243          */
2244         LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2245                 do {
2246                         newnfs_copycred(&op->nfso_cred, tcred);
2247                         error = nfscl_tryclose(op, tcred, nmp, p);
2248                         if (error == NFSERR_GRACE)
2249                                 (void) nfs_catnap(PZERO, error, "nfsexcls");
2250                 } while (error == NFSERR_GRACE);
2251                 LIST_REMOVE(op, nfso_list);
2252                 FREE((caddr_t)op, M_NFSCLOPEN);
2253         }
2254         if (nowp != NULL)
2255                 FREE((caddr_t)nowp, M_NFSCLOWNER);
2256
2257         TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2258                 do {
2259                         newnfs_copycred(&dp->nfsdl_cred, tcred);
2260                         error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2261                         if (error == NFSERR_GRACE)
2262                                 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2263                 } while (error == NFSERR_GRACE);
2264                 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2265                 FREE((caddr_t)dp, M_NFSCLDELEG);
2266         }
2267
2268         /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
2269         if (NFSHASNFSV4N(nmp))
2270                 (void)nfsrpc_reclaimcomplete(nmp, cred, p);
2271
2272         NFSLOCKCLSTATE();
2273         clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2274         wakeup(&clp->nfsc_flags);
2275         nfsv4_unlock(&clp->nfsc_lock, 0);
2276         NFSUNLOCKCLSTATE();
2277         NFSFREECRED(tcred);
2278 }
2279
2280 /*
2281  * This function is called when a server replies with NFSERR_EXPIRED.
2282  * It deletes all state for the client and does a fresh SetClientId/confirm.
2283  * XXX Someday it should post a signal to the process(es) that hold the
2284  * state, so they know that lock state has been lost.
2285  */
2286 APPLESTATIC int
2287 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2288 {
2289         struct nfsmount *nmp;
2290         struct ucred *cred;
2291         int igotlock = 0, error, trycnt;
2292
2293         /*
2294          * If the clientid has gone away or a new SetClientid has already
2295          * been done, just return ok.
2296          */
2297         if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2298                 return (0);
2299
2300         /*
2301          * First, lock the client structure, so everyone else will
2302          * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2303          * that only one thread does the work.
2304          */
2305         NFSLOCKCLSTATE();
2306         clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2307         do {
2308                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2309                     NFSCLSTATEMUTEXPTR, NULL);
2310         } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2311         if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2312                 if (igotlock)
2313                         nfsv4_unlock(&clp->nfsc_lock, 0);
2314                 NFSUNLOCKCLSTATE();
2315                 return (0);
2316         }
2317         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2318         NFSUNLOCKCLSTATE();
2319
2320         nmp = clp->nfsc_nmp;
2321         if (nmp == NULL)
2322                 panic("nfscl expired");
2323         cred = newnfs_getcred();
2324         trycnt = 5;
2325         do {
2326                 error = nfsrpc_setclient(nmp, clp, 0, cred, p);
2327         } while ((error == NFSERR_STALECLIENTID ||
2328              error == NFSERR_BADSESSION ||
2329              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2330         if (error) {
2331                 NFSLOCKCLSTATE();
2332                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2333         } else {
2334                 /*
2335                  * Expire the state for the client.
2336                  */
2337                 nfscl_expireclient(clp, nmp, cred, p);
2338                 NFSLOCKCLSTATE();
2339                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2340                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2341         }
2342         clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2343         wakeup(&clp->nfsc_flags);
2344         nfsv4_unlock(&clp->nfsc_lock, 0);
2345         NFSUNLOCKCLSTATE();
2346         NFSFREECRED(cred);
2347         return (error);
2348 }
2349
2350 /*
2351  * This function inserts a lock in the list after insert_lop.
2352  */
2353 static void
2354 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2355     struct nfscllock *insert_lop, int local)
2356 {
2357
2358         if ((struct nfscllockowner *)insert_lop == lp)
2359                 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2360         else
2361                 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2362         if (local)
2363                 nfsstatsv1.cllocallocks++;
2364         else
2365                 nfsstatsv1.cllocks++;
2366 }
2367
2368 /*
2369  * This function updates the locking for a lock owner and given file. It
2370  * maintains a list of lock ranges ordered on increasing file offset that
2371  * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2372  * It always adds new_lop to the list and sometimes uses the one pointed
2373  * at by other_lopp.
2374  * Returns 1 if the locks were modified, 0 otherwise.
2375  */
2376 static int
2377 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2378     struct nfscllock **other_lopp, int local)
2379 {
2380         struct nfscllock *new_lop = *new_lopp;
2381         struct nfscllock *lop, *tlop, *ilop;
2382         struct nfscllock *other_lop;
2383         int unlock = 0, modified = 0;
2384         u_int64_t tmp;
2385
2386         /*
2387          * Work down the list until the lock is merged.
2388          */
2389         if (new_lop->nfslo_type == F_UNLCK)
2390                 unlock = 1;
2391         ilop = (struct nfscllock *)lp;
2392         lop = LIST_FIRST(&lp->nfsl_lock);
2393         while (lop != NULL) {
2394             /*
2395              * Only check locks for this file that aren't before the start of
2396              * new lock's range.
2397              */
2398             if (lop->nfslo_end >= new_lop->nfslo_first) {
2399                 if (new_lop->nfslo_end < lop->nfslo_first) {
2400                     /*
2401                      * If the new lock ends before the start of the
2402                      * current lock's range, no merge, just insert
2403                      * the new lock.
2404                      */
2405                     break;
2406                 }
2407                 if (new_lop->nfslo_type == lop->nfslo_type ||
2408                     (new_lop->nfslo_first <= lop->nfslo_first &&
2409                      new_lop->nfslo_end >= lop->nfslo_end)) {
2410                     /*
2411                      * This lock can be absorbed by the new lock/unlock.
2412                      * This happens when it covers the entire range
2413                      * of the old lock or is contiguous
2414                      * with the old lock and is of the same type or an
2415                      * unlock.
2416                      */
2417                     if (new_lop->nfslo_type != lop->nfslo_type ||
2418                         new_lop->nfslo_first != lop->nfslo_first ||
2419                         new_lop->nfslo_end != lop->nfslo_end)
2420                         modified = 1;
2421                     if (lop->nfslo_first < new_lop->nfslo_first)
2422                         new_lop->nfslo_first = lop->nfslo_first;
2423                     if (lop->nfslo_end > new_lop->nfslo_end)
2424                         new_lop->nfslo_end = lop->nfslo_end;
2425                     tlop = lop;
2426                     lop = LIST_NEXT(lop, nfslo_list);
2427                     nfscl_freelock(tlop, local);
2428                     continue;
2429                 }
2430
2431                 /*
2432                  * All these cases are for contiguous locks that are not the
2433                  * same type, so they can't be merged.
2434                  */
2435                 if (new_lop->nfslo_first <= lop->nfslo_first) {
2436                     /*
2437                      * This case is where the new lock overlaps with the
2438                      * first part of the old lock. Move the start of the
2439                      * old lock to just past the end of the new lock. The
2440                      * new lock will be inserted in front of the old, since
2441                      * ilop hasn't been updated. (We are done now.)
2442                      */
2443                     if (lop->nfslo_first != new_lop->nfslo_end) {
2444                         lop->nfslo_first = new_lop->nfslo_end;
2445                         modified = 1;
2446                     }
2447                     break;
2448                 }
2449                 if (new_lop->nfslo_end >= lop->nfslo_end) {
2450                     /*
2451                      * This case is where the new lock overlaps with the
2452                      * end of the old lock's range. Move the old lock's
2453                      * end to just before the new lock's first and insert
2454                      * the new lock after the old lock.
2455                      * Might not be done yet, since the new lock could
2456                      * overlap further locks with higher ranges.
2457                      */
2458                     if (lop->nfslo_end != new_lop->nfslo_first) {
2459                         lop->nfslo_end = new_lop->nfslo_first;
2460                         modified = 1;
2461                     }
2462                     ilop = lop;
2463                     lop = LIST_NEXT(lop, nfslo_list);
2464                     continue;
2465                 }
2466                 /*
2467                  * The final case is where the new lock's range is in the
2468                  * middle of the current lock's and splits the current lock
2469                  * up. Use *other_lopp to handle the second part of the
2470                  * split old lock range. (We are done now.)
2471                  * For unlock, we use new_lop as other_lop and tmp, since
2472                  * other_lop and new_lop are the same for this case.
2473                  * We noted the unlock case above, so we don't need
2474                  * new_lop->nfslo_type any longer.
2475                  */
2476                 tmp = new_lop->nfslo_first;
2477                 if (unlock) {
2478                     other_lop = new_lop;
2479                     *new_lopp = NULL;
2480                 } else {
2481                     other_lop = *other_lopp;
2482                     *other_lopp = NULL;
2483                 }
2484                 other_lop->nfslo_first = new_lop->nfslo_end;
2485                 other_lop->nfslo_end = lop->nfslo_end;
2486                 other_lop->nfslo_type = lop->nfslo_type;
2487                 lop->nfslo_end = tmp;
2488                 nfscl_insertlock(lp, other_lop, lop, local);
2489                 ilop = lop;
2490                 modified = 1;
2491                 break;
2492             }
2493             ilop = lop;
2494             lop = LIST_NEXT(lop, nfslo_list);
2495             if (lop == NULL)
2496                 break;
2497         }
2498
2499         /*
2500          * Insert the new lock in the list at the appropriate place.
2501          */
2502         if (!unlock) {
2503                 nfscl_insertlock(lp, new_lop, ilop, local);
2504                 *new_lopp = NULL;
2505                 modified = 1;
2506         }
2507         return (modified);
2508 }
2509
2510 /*
2511  * This function must be run as a kernel thread.
2512  * It does Renew Ops and recovery, when required.
2513  */
2514 APPLESTATIC void
2515 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2516 {
2517         struct nfsclowner *owp, *nowp;
2518         struct nfsclopen *op;
2519         struct nfscllockowner *lp, *nlp;
2520         struct nfscldeleghead dh;
2521         struct nfscldeleg *dp, *ndp;
2522         struct ucred *cred;
2523         u_int32_t clidrev;
2524         int error, cbpathdown, islept, igotlock, ret, clearok;
2525         uint32_t recover_done_time = 0;
2526         time_t mytime;
2527         static time_t prevsec = 0;
2528         struct nfscllockownerfh *lfhp, *nlfhp;
2529         struct nfscllockownerfhhead lfh;
2530         struct nfscllayout *lyp, *nlyp;
2531         struct nfscldevinfo *dip, *ndip;
2532         struct nfscllayouthead rlh;
2533         struct nfsclrecalllayout *recallp;
2534         struct nfsclds *dsp;
2535
2536         cred = newnfs_getcred();
2537         NFSLOCKCLSTATE();
2538         clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2539         NFSUNLOCKCLSTATE();
2540         for(;;) {
2541                 newnfs_setroot(cred);
2542                 cbpathdown = 0;
2543                 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2544                         /*
2545                          * Only allow one recover within 1/2 of the lease
2546                          * duration (nfsc_renew).
2547                          */
2548                         if (recover_done_time < NFSD_MONOSEC) {
2549                                 recover_done_time = NFSD_MONOSEC +
2550                                     clp->nfsc_renew;
2551                                 NFSCL_DEBUG(1, "Doing recovery..\n");
2552                                 nfscl_recover(clp, cred, p);
2553                         } else {
2554                                 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n",
2555                                     recover_done_time, (intmax_t)NFSD_MONOSEC);
2556                                 NFSLOCKCLSTATE();
2557                                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2558                                 NFSUNLOCKCLSTATE();
2559                         }
2560                 }
2561                 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2562                     (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2563                         clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2564                         clidrev = clp->nfsc_clientidrev;
2565                         error = nfsrpc_renew(clp, NULL, cred, p);
2566                         if (error == NFSERR_CBPATHDOWN)
2567                             cbpathdown = 1;
2568                         else if (error == NFSERR_STALECLIENTID ||
2569                             error == NFSERR_BADSESSION) {
2570                             NFSLOCKCLSTATE();
2571                             clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2572                             NFSUNLOCKCLSTATE();
2573                         } else if (error == NFSERR_EXPIRED)
2574                             (void) nfscl_hasexpired(clp, clidrev, p);
2575                 }
2576
2577 checkdsrenew:
2578                 if (NFSHASNFSV4N(clp->nfsc_nmp)) {
2579                         /* Do renews for any DS sessions. */
2580                         NFSLOCKMNT(clp->nfsc_nmp);
2581                         /* Skip first entry, since the MDS is handled above. */
2582                         dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
2583                         if (dsp != NULL)
2584                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2585                         while (dsp != NULL) {
2586                                 if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
2587                                     dsp->nfsclds_sess.nfsess_defunct == 0) {
2588                                         dsp->nfsclds_expire = NFSD_MONOSEC +
2589                                             clp->nfsc_renew;
2590                                         NFSUNLOCKMNT(clp->nfsc_nmp);
2591                                         (void)nfsrpc_renew(clp, dsp, cred, p);
2592                                         goto checkdsrenew;
2593                                 }
2594                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2595                         }
2596                         NFSUNLOCKMNT(clp->nfsc_nmp);
2597                 }
2598
2599                 TAILQ_INIT(&dh);
2600                 NFSLOCKCLSTATE();
2601                 if (cbpathdown)
2602                         /* It's a Total Recall! */
2603                         nfscl_totalrecall(clp);
2604
2605                 /*
2606                  * Now, handle defunct owners.
2607                  */
2608                 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2609                         if (LIST_EMPTY(&owp->nfsow_open)) {
2610                                 if (owp->nfsow_defunct != 0)
2611                                         nfscl_freeopenowner(owp, 0);
2612                         }
2613                 }
2614
2615                 /*
2616                  * Do the recall on any delegations. To avoid trouble, always
2617                  * come back up here after having slept.
2618                  */
2619                 igotlock = 0;
2620 tryagain:
2621                 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2622                 while (dp != NULL) {
2623                         ndp = TAILQ_NEXT(dp, nfsdl_list);
2624                         if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2625                                 /*
2626                                  * Wait for outstanding I/O ops to be done.
2627                                  */
2628                                 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2629                                     if (igotlock) {
2630                                         nfsv4_unlock(&clp->nfsc_lock, 0);
2631                                         igotlock = 0;
2632                                     }
2633                                     dp->nfsdl_rwlock.nfslock_lock |=
2634                                         NFSV4LOCK_WANTED;
2635                                     (void) nfsmsleep(&dp->nfsdl_rwlock,
2636                                         NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
2637                                         NULL);
2638                                     goto tryagain;
2639                                 }
2640                                 while (!igotlock) {
2641                                     igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2642                                         &islept, NFSCLSTATEMUTEXPTR, NULL);
2643                                     if (islept)
2644                                         goto tryagain;
2645                                 }
2646                                 NFSUNLOCKCLSTATE();
2647                                 newnfs_copycred(&dp->nfsdl_cred, cred);
2648                                 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2649                                     NULL, cred, p, 1);
2650                                 if (!ret) {
2651                                     nfscl_cleandeleg(dp);
2652                                     TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2653                                         nfsdl_list);
2654                                     LIST_REMOVE(dp, nfsdl_hash);
2655                                     TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2656                                     nfscl_delegcnt--;
2657                                     nfsstatsv1.cldelegates--;
2658                                 }
2659                                 NFSLOCKCLSTATE();
2660                         }
2661                         dp = ndp;
2662                 }
2663
2664                 /*
2665                  * Clear out old delegations, if we are above the high water
2666                  * mark. Only clear out ones with no state related to them.
2667                  * The tailq list is in LRU order.
2668                  */
2669                 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2670                 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2671                     ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2672                     if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2673                         dp->nfsdl_rwlock.nfslock_lock == 0 &&
2674                         dp->nfsdl_timestamp < NFSD_MONOSEC &&
2675                         (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2676                           NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2677                         clearok = 1;
2678                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2679                             op = LIST_FIRST(&owp->nfsow_open);
2680                             if (op != NULL) {
2681                                 clearok = 0;
2682                                 break;
2683                             }
2684                         }
2685                         if (clearok) {
2686                             LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2687                                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2688                                     clearok = 0;
2689                                     break;
2690                                 }
2691                             }
2692                         }
2693                         if (clearok) {
2694                             TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2695                             LIST_REMOVE(dp, nfsdl_hash);
2696                             TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2697                             nfscl_delegcnt--;
2698                             nfsstatsv1.cldelegates--;
2699                         }
2700                     }
2701                     dp = ndp;
2702                 }
2703                 if (igotlock)
2704                         nfsv4_unlock(&clp->nfsc_lock, 0);
2705
2706                 /*
2707                  * Do the recall on any layouts. To avoid trouble, always
2708                  * come back up here after having slept.
2709                  */
2710                 TAILQ_INIT(&rlh);
2711 tryagain2:
2712                 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
2713                         if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
2714                                 /*
2715                                  * Wait for outstanding I/O ops to be done.
2716                                  */
2717                                 if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
2718                                     (lyp->nfsly_lock.nfslock_lock &
2719                                      NFSV4LOCK_LOCK) != 0) {
2720                                         lyp->nfsly_lock.nfslock_lock |=
2721                                             NFSV4LOCK_WANTED;
2722                                         (void)nfsmsleep(&lyp->nfsly_lock,
2723                                             NFSCLSTATEMUTEXPTR, PZERO, "nfslyp",
2724                                             NULL);
2725                                         goto tryagain2;
2726                                 }
2727                                 /* Move the layout to the recall list. */
2728                                 TAILQ_REMOVE(&clp->nfsc_layout, lyp,
2729                                     nfsly_list);
2730                                 LIST_REMOVE(lyp, nfsly_hash);
2731                                 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
2732
2733                                 /* Handle any layout commits. */
2734                                 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
2735                                     (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
2736                                         lyp->nfsly_flags &= ~NFSLY_WRITTEN;
2737                                         NFSUNLOCKCLSTATE();
2738                                         NFSCL_DEBUG(3, "do layoutcommit\n");
2739                                         nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
2740                                             cred, p);
2741                                         NFSLOCKCLSTATE();
2742                                         goto tryagain2;
2743                                 }
2744                         }
2745                 }
2746
2747                 /* Now, look for stale layouts. */
2748                 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
2749                 while (lyp != NULL) {
2750                         nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
2751                         if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
2752                             (lyp->nfsly_flags & NFSLY_RECALL) == 0 &&
2753                             lyp->nfsly_lock.nfslock_usecnt == 0 &&
2754                             lyp->nfsly_lock.nfslock_lock == 0) {
2755                                 NFSCL_DEBUG(4, "ret stale lay=%d\n",
2756                                     nfscl_layoutcnt);
2757                                 recallp = malloc(sizeof(*recallp),
2758                                     M_NFSLAYRECALL, M_NOWAIT);
2759                                 if (recallp == NULL)
2760                                         break;
2761                                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
2762                                     lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
2763                                     lyp->nfsly_stateid.seqid, recallp);
2764                         }
2765                         lyp = nlyp;
2766                 }
2767
2768                 /*
2769                  * Free up any unreferenced device info structures.
2770                  */
2771                 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
2772                         if (dip->nfsdi_layoutrefs == 0 &&
2773                             dip->nfsdi_refcnt == 0) {
2774                                 NFSCL_DEBUG(4, "freeing devinfo\n");
2775                                 LIST_REMOVE(dip, nfsdi_list);
2776                                 nfscl_freedevinfo(dip);
2777                         }
2778                 }
2779                 NFSUNLOCKCLSTATE();
2780
2781                 /* Do layout return(s), as required. */
2782                 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
2783                         TAILQ_REMOVE(&rlh, lyp, nfsly_list);
2784                         NFSCL_DEBUG(4, "ret layout\n");
2785                         nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
2786                         nfscl_freelayout(lyp);
2787                 }
2788
2789                 /*
2790                  * Delegreturn any delegations cleaned out or recalled.
2791                  */
2792                 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
2793                         newnfs_copycred(&dp->nfsdl_cred, cred);
2794                         (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2795                         TAILQ_REMOVE(&dh, dp, nfsdl_list);
2796                         FREE((caddr_t)dp, M_NFSCLDELEG);
2797                 }
2798
2799                 SLIST_INIT(&lfh);
2800                 /*
2801                  * Call nfscl_cleanupkext() once per second to check for
2802                  * open/lock owners where the process has exited.
2803                  */
2804                 mytime = NFSD_MONOSEC;
2805                 if (prevsec != mytime) {
2806                         prevsec = mytime;
2807                         nfscl_cleanupkext(clp, &lfh);
2808                 }
2809
2810                 /*
2811                  * Do a ReleaseLockOwner for all lock owners where the
2812                  * associated process no longer exists, as found by
2813                  * nfscl_cleanupkext().
2814                  */
2815                 newnfs_setroot(cred);
2816                 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
2817                         LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
2818                             nlp) {
2819                                 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
2820                                     lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
2821                                     p);
2822                                 nfscl_freelockowner(lp, 0);
2823                         }
2824                         free(lfhp, M_TEMP);
2825                 }
2826                 SLIST_INIT(&lfh);
2827
2828                 NFSLOCKCLSTATE();
2829                 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
2830                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
2831                             hz);
2832                 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
2833                         clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
2834                         NFSUNLOCKCLSTATE();
2835                         NFSFREECRED(cred);
2836                         wakeup((caddr_t)clp);
2837                         return;
2838                 }
2839                 NFSUNLOCKCLSTATE();
2840         }
2841 }
2842
2843 /*
2844  * Initiate state recovery. Called when NFSERR_STALECLIENTID,
2845  * NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
2846  */
2847 APPLESTATIC void
2848 nfscl_initiate_recovery(struct nfsclclient *clp)
2849 {
2850
2851         if (clp == NULL)
2852                 return;
2853         NFSLOCKCLSTATE();
2854         clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2855         NFSUNLOCKCLSTATE();
2856         wakeup((caddr_t)clp);
2857 }
2858
2859 /*
2860  * Dump out the state stuff for debugging.
2861  */
2862 APPLESTATIC void
2863 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
2864     int lockowner, int locks)
2865 {
2866         struct nfsclclient *clp;
2867         struct nfsclowner *owp;
2868         struct nfsclopen *op;
2869         struct nfscllockowner *lp;
2870         struct nfscllock *lop;
2871         struct nfscldeleg *dp;
2872
2873         clp = nmp->nm_clp;
2874         if (clp == NULL) {
2875                 printf("nfscl dumpstate NULL clp\n");
2876                 return;
2877         }
2878         NFSLOCKCLSTATE();
2879         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2880           LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2881             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2882                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2883                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2884                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2885                     owp->nfsow_seqid);
2886             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2887                 if (opens)
2888                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2889                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2890                         op->nfso_stateid.other[2], op->nfso_opencnt,
2891                         op->nfso_fh[12]);
2892                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2893                     if (lockowner)
2894                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2895                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2896                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2897                             lp->nfsl_seqid,
2898                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2899                             lp->nfsl_stateid.other[2]);
2900                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2901                         if (locks)
2902 #ifdef __FreeBSD__
2903                             printf("lck typ=%d fst=%ju end=%ju\n",
2904                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2905                                 (intmax_t)lop->nfslo_end);
2906 #else
2907                             printf("lck typ=%d fst=%qd end=%qd\n",
2908                                 lop->nfslo_type, lop->nfslo_first,
2909                                 lop->nfslo_end);
2910 #endif
2911                     }
2912                 }
2913             }
2914           }
2915         }
2916         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2917             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2918                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2919                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2920                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2921                     owp->nfsow_seqid);
2922             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2923                 if (opens)
2924                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2925                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2926                         op->nfso_stateid.other[2], op->nfso_opencnt,
2927                         op->nfso_fh[12]);
2928                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2929                     if (lockowner)
2930                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2931                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2932                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2933                             lp->nfsl_seqid,
2934                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2935                             lp->nfsl_stateid.other[2]);
2936                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2937                         if (locks)
2938 #ifdef __FreeBSD__
2939                             printf("lck typ=%d fst=%ju end=%ju\n",
2940                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2941                                 (intmax_t)lop->nfslo_end);
2942 #else
2943                             printf("lck typ=%d fst=%qd end=%qd\n",
2944                                 lop->nfslo_type, lop->nfslo_first,
2945                                 lop->nfslo_end);
2946 #endif
2947                     }
2948                 }
2949             }
2950         }
2951         NFSUNLOCKCLSTATE();
2952 }
2953
2954 /*
2955  * Check for duplicate open owners and opens.
2956  * (Only used as a diagnostic aid.)
2957  */
2958 APPLESTATIC void
2959 nfscl_dupopen(vnode_t vp, int dupopens)
2960 {
2961         struct nfsclclient *clp;
2962         struct nfsclowner *owp, *owp2;
2963         struct nfsclopen *op, *op2;
2964         struct nfsfh *nfhp;
2965
2966         clp = VFSTONFS(vnode_mount(vp))->nm_clp;
2967         if (clp == NULL) {
2968                 printf("nfscl dupopen NULL clp\n");
2969                 return;
2970         }
2971         nfhp = VTONFS(vp)->n_fhp;
2972         NFSLOCKCLSTATE();
2973
2974         /*
2975          * First, search for duplicate owners.
2976          * These should never happen!
2977          */
2978         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2979             LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2980                 if (owp != owp2 &&
2981                     !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
2982                     NFSV4CL_LOCKNAMELEN)) {
2983                         NFSUNLOCKCLSTATE();
2984                         printf("DUP OWNER\n");
2985                         nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
2986                         return;
2987                 }
2988             }
2989         }
2990
2991         /*
2992          * Now, search for duplicate stateids.
2993          * These shouldn't happen, either.
2994          */
2995         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2996             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2997                 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2998                     LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2999                         if (op != op2 &&
3000                             (op->nfso_stateid.other[0] != 0 ||
3001                              op->nfso_stateid.other[1] != 0 ||
3002                              op->nfso_stateid.other[2] != 0) &&
3003                             op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
3004                             op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
3005                             op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
3006                             NFSUNLOCKCLSTATE();
3007                             printf("DUP STATEID\n");
3008                             nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
3009                                 0);
3010                             return;
3011                         }
3012                     }
3013                 }
3014             }
3015         }
3016
3017         /*
3018          * Now search for duplicate opens.
3019          * Duplicate opens for the same owner
3020          * should never occur. Other duplicates are
3021          * possible and are checked for if "dupopens"
3022          * is true.
3023          */
3024         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3025             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3026                 if (nfhp->nfh_len == op2->nfso_fhlen &&
3027                     !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
3028                     LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3029                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3030                             if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
3031                                 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
3032                                 (!NFSBCMP(op->nfso_own->nfsow_owner,
3033                                  op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
3034                                  dupopens)) {
3035                                 if (!NFSBCMP(op->nfso_own->nfsow_owner,
3036                                     op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3037                                     NFSUNLOCKCLSTATE();
3038                                     printf("BADDUP OPEN\n");
3039                                 } else {
3040                                     NFSUNLOCKCLSTATE();
3041                                     printf("DUP OPEN\n");
3042                                 }
3043                                 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
3044                                     0, 0);
3045                                 return;
3046                             }
3047                         }
3048                     }
3049                 }
3050             }
3051         }
3052         NFSUNLOCKCLSTATE();
3053 }
3054
3055 /*
3056  * During close, find an open that needs to be dereferenced and
3057  * dereference it. If there are no more opens for this file,
3058  * log a message to that effect.
3059  * Opens aren't actually Close'd until VOP_INACTIVE() is performed
3060  * on the file's vnode.
3061  * This is the safe way, since it is difficult to identify
3062  * which open the close is for and I/O can be performed after the
3063  * close(2) system call when a file is mmap'd.
3064  * If it returns 0 for success, there will be a referenced
3065  * clp returned via clpp.
3066  */
3067 APPLESTATIC int
3068 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
3069 {
3070         struct nfsclclient *clp;
3071         struct nfsclowner *owp;
3072         struct nfsclopen *op;
3073         struct nfscldeleg *dp;
3074         struct nfsfh *nfhp;
3075         int error, notdecr;
3076
3077         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3078         if (error)
3079                 return (error);
3080         *clpp = clp;
3081
3082         nfhp = VTONFS(vp)->n_fhp;
3083         notdecr = 1;
3084         NFSLOCKCLSTATE();
3085         /*
3086          * First, look for one under a delegation that was locally issued
3087          * and just decrement the opencnt for it. Since all my Opens against
3088          * the server are DENY_NONE, I don't see a problem with hanging
3089          * onto them. (It is much easier to use one of the extant Opens
3090          * that I already have on the server when a Delegation is recalled
3091          * than to do fresh Opens.) Someday, I might need to rethink this, but.
3092          */
3093         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3094         if (dp != NULL) {
3095                 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3096                         op = LIST_FIRST(&owp->nfsow_open);
3097                         if (op != NULL) {
3098                                 /*
3099                                  * Since a delegation is for a file, there
3100                                  * should never be more than one open for
3101                                  * each openowner.
3102                                  */
3103                                 if (LIST_NEXT(op, nfso_list) != NULL)
3104                                         panic("nfscdeleg opens");
3105                                 if (notdecr && op->nfso_opencnt > 0) {
3106                                         notdecr = 0;
3107                                         op->nfso_opencnt--;
3108                                         break;
3109                                 }
3110                         }
3111                 }
3112         }
3113
3114         /* Now process the opens against the server. */
3115         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3116                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3117                         if (op->nfso_fhlen == nfhp->nfh_len &&
3118                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3119                             nfhp->nfh_len)) {
3120                                 /* Found an open, decrement cnt if possible */
3121                                 if (notdecr && op->nfso_opencnt > 0) {
3122                                         notdecr = 0;
3123                                         op->nfso_opencnt--;
3124                                 }
3125                                 /*
3126                                  * There are more opens, so just return.
3127                                  */
3128                                 if (op->nfso_opencnt > 0) {
3129                                         NFSUNLOCKCLSTATE();
3130                                         return (0);
3131                                 }
3132                         }
3133                 }
3134         }
3135         NFSUNLOCKCLSTATE();
3136         if (notdecr)
3137                 printf("nfscl: never fnd open\n");
3138         return (0);
3139 }
3140
3141 APPLESTATIC int
3142 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
3143 {
3144         struct nfsclclient *clp;
3145         struct nfsclowner *owp, *nowp;
3146         struct nfsclopen *op;
3147         struct nfscldeleg *dp;
3148         struct nfsfh *nfhp;
3149         struct nfsclrecalllayout *recallp;
3150         int error;
3151
3152         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3153         if (error)
3154                 return (error);
3155         *clpp = clp;
3156
3157         nfhp = VTONFS(vp)->n_fhp;
3158         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
3159         NFSLOCKCLSTATE();
3160         /*
3161          * First get rid of the local Open structures, which should be no
3162          * longer in use.
3163          */
3164         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3165         if (dp != NULL) {
3166                 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
3167                         op = LIST_FIRST(&owp->nfsow_open);
3168                         if (op != NULL) {
3169                                 KASSERT((op->nfso_opencnt == 0),
3170                                     ("nfscl: bad open cnt on deleg"));
3171                                 nfscl_freeopen(op, 1);
3172                         }
3173                         nfscl_freeopenowner(owp, 1);
3174                 }
3175         }
3176
3177         /* Return any layouts marked return on close. */
3178         nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp);
3179
3180         /* Now process the opens against the server. */
3181 lookformore:
3182         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3183                 op = LIST_FIRST(&owp->nfsow_open);
3184                 while (op != NULL) {
3185                         if (op->nfso_fhlen == nfhp->nfh_len &&
3186                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3187                             nfhp->nfh_len)) {
3188                                 /* Found an open, close it. */
3189                                 KASSERT((op->nfso_opencnt == 0),
3190                                     ("nfscl: bad open cnt on server"));
3191                                 NFSUNLOCKCLSTATE();
3192                                 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
3193                                     p);
3194                                 NFSLOCKCLSTATE();
3195                                 goto lookformore;
3196                         }
3197                         op = LIST_NEXT(op, nfso_list);
3198                 }
3199         }
3200         NFSUNLOCKCLSTATE();
3201         /*
3202          * recallp has been set NULL by nfscl_retoncloselayout() if it was
3203          * used by the function, but calling free() with a NULL pointer is ok.
3204          */
3205         free(recallp, M_NFSLAYRECALL);
3206         return (0);
3207 }
3208
3209 /*
3210  * Return all delegations on this client.
3211  * (Must be called with client sleep lock.)
3212  */
3213 static void
3214 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
3215 {
3216         struct nfscldeleg *dp, *ndp;
3217         struct ucred *cred;
3218
3219         cred = newnfs_getcred();
3220         TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3221                 nfscl_cleandeleg(dp);
3222                 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3223                 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3224         }
3225         NFSFREECRED(cred);
3226 }
3227
3228 /*
3229  * Do a callback RPC.
3230  */
3231 APPLESTATIC void
3232 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3233 {
3234         int clist, gotseq_ok, i, j, k, op, rcalls;
3235         u_int32_t *tl;
3236         struct nfsclclient *clp;
3237         struct nfscldeleg *dp = NULL;
3238         int numops, taglen = -1, error = 0, trunc;
3239         u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
3240         u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3241         vnode_t vp = NULL;
3242         struct nfsnode *np;
3243         struct vattr va;
3244         struct nfsfh *nfhp;
3245         mount_t mp;
3246         nfsattrbit_t attrbits, rattrbits;
3247         nfsv4stateid_t stateid;
3248         uint32_t seqid, slotid = 0, highslot, cachethis;
3249         uint8_t sessionid[NFSX_V4SESSIONID];
3250         struct mbuf *rep;
3251         struct nfscllayout *lyp;
3252         uint64_t filesid[2], len, off;
3253         int changed, gotone, laytype, recalltype;
3254         uint32_t iomode;
3255         struct nfsclrecalllayout *recallp = NULL;
3256         struct nfsclsession *tsep;
3257
3258         gotseq_ok = 0;
3259         nfsrvd_rephead(nd);
3260         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3261         taglen = fxdr_unsigned(int, *tl);
3262         if (taglen < 0) {
3263                 error = EBADRPC;
3264                 goto nfsmout;
3265         }
3266         if (taglen <= NFSV4_SMALLSTR)
3267                 tagstr = tag;
3268         else
3269                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3270         error = nfsrv_mtostr(nd, tagstr, taglen);
3271         if (error) {
3272                 if (taglen > NFSV4_SMALLSTR)
3273                         free(tagstr, M_TEMP);
3274                 taglen = -1;
3275                 goto nfsmout;
3276         }
3277         (void) nfsm_strtom(nd, tag, taglen);
3278         if (taglen > NFSV4_SMALLSTR) {
3279                 free(tagstr, M_TEMP);
3280         }
3281         NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3282         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3283         minorvers = fxdr_unsigned(u_int32_t, *tl++);
3284         if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION)
3285                 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3286         cbident = fxdr_unsigned(u_int32_t, *tl++);
3287         if (nd->nd_repstat)
3288                 numops = 0;
3289         else
3290                 numops = fxdr_unsigned(int, *tl);
3291         /*
3292          * Loop around doing the sub ops.
3293          */
3294         for (i = 0; i < numops; i++) {
3295                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3296                 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3297                 *repp++ = *tl;
3298                 op = fxdr_unsigned(int, *tl);
3299                 if (op < NFSV4OP_CBGETATTR ||
3300                    (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
3301                    (op > NFSV4OP_CBNOTIFYDEVID &&
3302                     minorvers == NFSV41_MINORVERSION)) {
3303                     nd->nd_repstat = NFSERR_OPILLEGAL;
3304                     *repp = nfscl_errmap(nd, minorvers);
3305                     retops++;
3306                     break;
3307                 }
3308                 nd->nd_procnum = op;
3309                 if (op < NFSV41_CBNOPS)
3310                         nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
3311                 switch (op) {
3312                 case NFSV4OP_CBGETATTR:
3313                         NFSCL_DEBUG(4, "cbgetattr\n");
3314                         mp = NULL;
3315                         vp = NULL;
3316                         error = nfsm_getfh(nd, &nfhp);
3317                         if (!error)
3318                                 error = nfsrv_getattrbits(nd, &attrbits,
3319                                     NULL, NULL);
3320                         if (error == 0 && i == 0 &&
3321                             minorvers != NFSV4_MINORVERSION)
3322                                 error = NFSERR_OPNOTINSESS;
3323                         if (!error) {
3324                                 mp = nfscl_getmnt(minorvers, sessionid, cbident,
3325                                     &clp);
3326                                 if (mp == NULL)
3327                                         error = NFSERR_SERVERFAULT;
3328                         }
3329                         if (!error) {
3330                                 error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3331                                     nfhp->nfh_len, p, &np);
3332                                 if (!error)
3333                                         vp = NFSTOV(np);
3334                         }
3335                         if (!error) {
3336                                 NFSZERO_ATTRBIT(&rattrbits);
3337                                 NFSLOCKCLSTATE();
3338                                 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3339                                     nfhp->nfh_len);
3340                                 if (dp != NULL) {
3341                                         if (NFSISSET_ATTRBIT(&attrbits,
3342                                             NFSATTRBIT_SIZE)) {
3343                                                 if (vp != NULL)
3344                                                         va.va_size = np->n_size;
3345                                                 else
3346                                                         va.va_size =
3347                                                             dp->nfsdl_size;
3348                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3349                                                     NFSATTRBIT_SIZE);
3350                                         }
3351                                         if (NFSISSET_ATTRBIT(&attrbits,
3352                                             NFSATTRBIT_CHANGE)) {
3353                                                 va.va_filerev =
3354                                                     dp->nfsdl_change;
3355                                                 if (vp == NULL ||
3356                                                     (np->n_flag & NDELEGMOD))
3357                                                         va.va_filerev++;
3358                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3359                                                     NFSATTRBIT_CHANGE);
3360                                         }
3361                                 } else
3362                                         error = NFSERR_SERVERFAULT;
3363                                 NFSUNLOCKCLSTATE();
3364                         }
3365                         if (vp != NULL)
3366                                 vrele(vp);
3367                         if (mp != NULL)
3368                                 vfs_unbusy(mp);
3369                         if (nfhp != NULL)
3370                                 FREE((caddr_t)nfhp, M_NFSFH);
3371                         if (!error)
3372                                 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3373                                     NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
3374                                     (uint64_t)0);
3375                         break;
3376                 case NFSV4OP_CBRECALL:
3377                         NFSCL_DEBUG(4, "cbrecall\n");
3378                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3379                             NFSX_UNSIGNED);
3380                         stateid.seqid = *tl++;
3381                         NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3382                             NFSX_STATEIDOTHER);
3383                         tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3384                         trunc = fxdr_unsigned(int, *tl);
3385                         error = nfsm_getfh(nd, &nfhp);
3386                         if (error == 0 && i == 0 &&
3387                             minorvers != NFSV4_MINORVERSION)
3388                                 error = NFSERR_OPNOTINSESS;
3389                         if (!error) {
3390                                 NFSLOCKCLSTATE();
3391                                 if (minorvers == NFSV4_MINORVERSION)
3392                                         clp = nfscl_getclnt(cbident);
3393                                 else
3394                                         clp = nfscl_getclntsess(sessionid);
3395                                 if (clp != NULL) {
3396                                         dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3397                                             nfhp->nfh_len);
3398                                         if (dp != NULL && (dp->nfsdl_flags &
3399                                             NFSCLDL_DELEGRET) == 0) {
3400                                                 dp->nfsdl_flags |=
3401                                                     NFSCLDL_RECALL;
3402                                                 wakeup((caddr_t)clp);
3403                                         }
3404                                 } else {
3405                                         error = NFSERR_SERVERFAULT;
3406                                 }
3407                                 NFSUNLOCKCLSTATE();
3408                         }
3409                         if (nfhp != NULL)
3410                                 FREE((caddr_t)nfhp, M_NFSFH);
3411                         break;
3412                 case NFSV4OP_CBLAYOUTRECALL:
3413                         NFSCL_DEBUG(4, "cblayrec\n");
3414                         nfhp = NULL;
3415                         NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
3416                         laytype = fxdr_unsigned(int, *tl++);
3417                         iomode = fxdr_unsigned(uint32_t, *tl++);
3418                         if (newnfs_true == *tl++)
3419                                 changed = 1;
3420                         else
3421                                 changed = 0;
3422                         recalltype = fxdr_unsigned(int, *tl);
3423                         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
3424                             M_WAITOK);
3425                         if (laytype != NFSLAYOUT_NFSV4_1_FILES)
3426                                 error = NFSERR_NOMATCHLAYOUT;
3427                         else if (recalltype == NFSLAYOUTRETURN_FILE) {
3428                                 error = nfsm_getfh(nd, &nfhp);
3429                                 NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
3430                                 if (error != 0)
3431                                         goto nfsmout;
3432                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
3433                                     NFSX_STATEID);
3434                                 off = fxdr_hyper(tl); tl += 2;
3435                                 len = fxdr_hyper(tl); tl += 2;
3436                                 stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
3437                                 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
3438                                 if (minorvers == NFSV4_MINORVERSION)
3439                                         error = NFSERR_NOTSUPP;
3440                                 else if (i == 0)
3441                                         error = NFSERR_OPNOTINSESS;
3442                                 if (error == 0) {
3443                                         NFSLOCKCLSTATE();
3444                                         clp = nfscl_getclntsess(sessionid);
3445                                         NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
3446                                         if (clp != NULL) {
3447                                                 lyp = nfscl_findlayout(clp,
3448                                                     nfhp->nfh_fh,
3449                                                     nfhp->nfh_len);
3450                                                 NFSCL_DEBUG(4, "cblyp=%p\n",
3451                                                     lyp);
3452                                                 if (lyp != NULL &&
3453                                                     (lyp->nfsly_flags &
3454                                                      NFSLY_FILES) != 0 &&
3455                                                     !NFSBCMP(stateid.other,
3456                                                     lyp->nfsly_stateid.other,
3457                                                     NFSX_STATEIDOTHER)) {
3458                                                         error =
3459                                                             nfscl_layoutrecall(
3460                                                             recalltype,
3461                                                             lyp, iomode, off,
3462                                                             len, stateid.seqid,
3463                                                             recallp);
3464                                                         recallp = NULL;
3465                                                         wakeup(clp);
3466                                                         NFSCL_DEBUG(4,
3467                                                             "aft layrcal=%d\n",
3468                                                             error);
3469                                                 } else
3470                                                         error =
3471                                                           NFSERR_NOMATCHLAYOUT;
3472                                         } else
3473                                                 error = NFSERR_NOMATCHLAYOUT;
3474                                         NFSUNLOCKCLSTATE();
3475                                 }
3476                                 free(nfhp, M_NFSFH);
3477                         } else if (recalltype == NFSLAYOUTRETURN_FSID) {
3478                                 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
3479                                 filesid[0] = fxdr_hyper(tl); tl += 2;
3480                                 filesid[1] = fxdr_hyper(tl); tl += 2;
3481                                 gotone = 0;
3482                                 NFSLOCKCLSTATE();
3483                                 clp = nfscl_getclntsess(sessionid);
3484                                 if (clp != NULL) {
3485                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3486                                             nfsly_list) {
3487                                                 if (lyp->nfsly_filesid[0] ==
3488                                                     filesid[0] &&
3489                                                     lyp->nfsly_filesid[1] ==
3490                                                     filesid[1]) {
3491                                                         error =
3492                                                             nfscl_layoutrecall(
3493                                                             recalltype,
3494                                                             lyp, iomode, 0,
3495                                                             UINT64_MAX,
3496                                                             lyp->nfsly_stateid.seqid,
3497                                                             recallp);
3498                                                         recallp = NULL;
3499                                                         gotone = 1;
3500                                                 }
3501                                         }
3502                                         if (gotone != 0)
3503                                                 wakeup(clp);
3504                                         else
3505                                                 error = NFSERR_NOMATCHLAYOUT;
3506                                 } else
3507                                         error = NFSERR_NOMATCHLAYOUT;
3508                                 NFSUNLOCKCLSTATE();
3509                         } else if (recalltype == NFSLAYOUTRETURN_ALL) {
3510                                 gotone = 0;
3511                                 NFSLOCKCLSTATE();
3512                                 clp = nfscl_getclntsess(sessionid);
3513                                 if (clp != NULL) {
3514                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3515                                             nfsly_list) {
3516                                                 error = nfscl_layoutrecall(
3517                                                     recalltype, lyp, iomode, 0,
3518                                                     UINT64_MAX,
3519                                                     lyp->nfsly_stateid.seqid,
3520                                                     recallp);
3521                                                 recallp = NULL;
3522                                                 gotone = 1;
3523                                         }
3524                                         if (gotone != 0)
3525                                                 wakeup(clp);
3526                                         else
3527                                                 error = NFSERR_NOMATCHLAYOUT;
3528                                 } else
3529                                         error = NFSERR_NOMATCHLAYOUT;
3530                                 NFSUNLOCKCLSTATE();
3531                         } else
3532                                 error = NFSERR_NOMATCHLAYOUT;
3533                         if (recallp != NULL) {
3534                                 free(recallp, M_NFSLAYRECALL);
3535                                 recallp = NULL;
3536                         }
3537                         break;
3538                 case NFSV4OP_CBSEQUENCE:
3539                         NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3540                             5 * NFSX_UNSIGNED);
3541                         bcopy(tl, sessionid, NFSX_V4SESSIONID);
3542                         tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3543                         seqid = fxdr_unsigned(uint32_t, *tl++);
3544                         slotid = fxdr_unsigned(uint32_t, *tl++);
3545                         highslot = fxdr_unsigned(uint32_t, *tl++);
3546                         cachethis = *tl++;
3547                         /* Throw away the referring call stuff. */
3548                         clist = fxdr_unsigned(int, *tl);
3549                         for (j = 0; j < clist; j++) {
3550                                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3551                                     NFSX_UNSIGNED);
3552                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3553                                 rcalls = fxdr_unsigned(int, *tl);
3554                                 for (k = 0; k < rcalls; k++) {
3555                                         NFSM_DISSECT(tl, uint32_t *,
3556                                             2 * NFSX_UNSIGNED);
3557                                 }
3558                         }
3559                         NFSLOCKCLSTATE();
3560                         if (i == 0) {
3561                                 clp = nfscl_getclntsess(sessionid);
3562                                 if (clp == NULL)
3563                                         error = NFSERR_SERVERFAULT;
3564                         } else
3565                                 error = NFSERR_SEQUENCEPOS;
3566                         if (error == 0) {
3567                                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3568                                 error = nfsv4_seqsession(seqid, slotid,
3569                                     highslot, tsep->nfsess_cbslots, &rep,
3570                                     tsep->nfsess_backslots);
3571                         }
3572                         NFSUNLOCKCLSTATE();
3573                         if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
3574                                 gotseq_ok = 1;
3575                                 if (rep != NULL) {
3576                                         /*
3577                                          * Handle a reply for a retried
3578                                          * callback.  The reply will be
3579                                          * re-inserted in the session cache
3580                                          * by the nfsv4_seqsess_cacherep() call
3581                                          * after out:
3582                                          */
3583                                         KASSERT(error == NFSERR_REPLYFROMCACHE,
3584                                             ("cbsequence: non-NULL rep"));
3585                                         NFSCL_DEBUG(4, "Got cbretry\n");
3586                                         m_freem(nd->nd_mreq);
3587                                         nd->nd_mreq = rep;
3588                                         rep = NULL;
3589                                         goto out;
3590                                 }
3591                                 NFSM_BUILD(tl, uint32_t *,
3592                                     NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
3593                                 bcopy(sessionid, tl, NFSX_V4SESSIONID);
3594                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3595                                 *tl++ = txdr_unsigned(seqid);
3596                                 *tl++ = txdr_unsigned(slotid);
3597                                 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
3598                                 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
3599                         }
3600                         break;
3601                 default:
3602                         if (i == 0 && minorvers == NFSV41_MINORVERSION)
3603                                 error = NFSERR_OPNOTINSESS;
3604                         else {
3605                                 NFSCL_DEBUG(1, "unsupp callback %d\n", op);
3606                                 error = NFSERR_NOTSUPP;
3607                         }
3608                         break;
3609                 }
3610                 if (error) {
3611                         if (error == EBADRPC || error == NFSERR_BADXDR) {
3612                                 nd->nd_repstat = NFSERR_BADXDR;
3613                         } else {
3614                                 nd->nd_repstat = error;
3615                         }
3616                         error = 0;
3617                 }
3618                 retops++;
3619                 if (nd->nd_repstat) {
3620                         *repp = nfscl_errmap(nd, minorvers);
3621                         break;
3622                 } else
3623                         *repp = 0;      /* NFS4_OK */
3624         }
3625 nfsmout:
3626         if (recallp != NULL)
3627                 free(recallp, M_NFSLAYRECALL);
3628         if (error) {
3629                 if (error == EBADRPC || error == NFSERR_BADXDR)
3630                         nd->nd_repstat = NFSERR_BADXDR;
3631                 else
3632                         printf("nfsv4 comperr1=%d\n", error);
3633         }
3634         if (taglen == -1) {
3635                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3636                 *tl++ = 0;
3637                 *tl = 0;
3638         } else {
3639                 *retopsp = txdr_unsigned(retops);
3640         }
3641         *nd->nd_errp = nfscl_errmap(nd, minorvers);
3642 out:
3643         if (gotseq_ok != 0) {
3644                 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
3645                 NFSLOCKCLSTATE();
3646                 clp = nfscl_getclntsess(sessionid);
3647                 if (clp != NULL) {
3648                         tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3649                         nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
3650                             NFSERR_OK, &rep);
3651                         NFSUNLOCKCLSTATE();
3652                 } else {
3653                         NFSUNLOCKCLSTATE();
3654                         m_freem(rep);
3655                 }
3656         }
3657 }
3658
3659 /*
3660  * Generate the next cbident value. Basically just increment a static value
3661  * and then check that it isn't already in the list, if it has wrapped around.
3662  */
3663 static u_int32_t
3664 nfscl_nextcbident(void)
3665 {
3666         struct nfsclclient *clp;
3667         int matched;
3668         static u_int32_t nextcbident = 0;
3669         static int haswrapped = 0;
3670
3671         nextcbident++;
3672         if (nextcbident == 0)
3673                 haswrapped = 1;
3674         if (haswrapped) {
3675                 /*
3676                  * Search the clientid list for one already using this cbident.
3677                  */
3678                 do {
3679                         matched = 0;
3680                         NFSLOCKCLSTATE();
3681                         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3682                                 if (clp->nfsc_cbident == nextcbident) {
3683                                         matched = 1;
3684                                         break;
3685                                 }
3686                         }
3687                         NFSUNLOCKCLSTATE();
3688                         if (matched == 1)
3689                                 nextcbident++;
3690                 } while (matched);
3691         }
3692         return (nextcbident);
3693 }
3694
3695 /*
3696  * Get the mount point related to a given cbident or session and busy it.
3697  */
3698 static mount_t
3699 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
3700     struct nfsclclient **clpp)
3701 {
3702         struct nfsclclient *clp;
3703         mount_t mp;
3704         int error;
3705         struct nfsclsession *tsep;
3706
3707         *clpp = NULL;
3708         NFSLOCKCLSTATE();
3709         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3710                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3711                 if (minorvers == NFSV4_MINORVERSION) {
3712                         if (clp->nfsc_cbident == cbident)
3713                                 break;
3714                 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3715                     NFSX_V4SESSIONID))
3716                         break;
3717         }
3718         if (clp == NULL) {
3719                 NFSUNLOCKCLSTATE();
3720                 return (NULL);
3721         }
3722         mp = clp->nfsc_nmp->nm_mountp;
3723         vfs_ref(mp);
3724         NFSUNLOCKCLSTATE();
3725         error = vfs_busy(mp, 0);
3726         vfs_rel(mp);
3727         if (error != 0)
3728                 return (NULL);
3729         *clpp = clp;
3730         return (mp);
3731 }
3732
3733 /*
3734  * Get the clientid pointer related to a given cbident.
3735  */
3736 static struct nfsclclient *
3737 nfscl_getclnt(u_int32_t cbident)
3738 {
3739         struct nfsclclient *clp;
3740
3741         LIST_FOREACH(clp, &nfsclhead, nfsc_list)
3742                 if (clp->nfsc_cbident == cbident)
3743                         break;
3744         return (clp);
3745 }
3746
3747 /*
3748  * Get the clientid pointer related to a given sessionid.
3749  */
3750 static struct nfsclclient *
3751 nfscl_getclntsess(uint8_t *sessionid)
3752 {
3753         struct nfsclclient *clp;
3754         struct nfsclsession *tsep;
3755
3756         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3757                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3758                 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3759                     NFSX_V4SESSIONID))
3760                         break;
3761         }
3762         return (clp);
3763 }
3764
3765 /*
3766  * Search for a lock conflict locally on the client. A conflict occurs if
3767  * - not same owner and overlapping byte range and at least one of them is
3768  *   a write lock or this is an unlock.
3769  */
3770 static int
3771 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
3772     struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
3773     struct nfscllock **lopp)
3774 {
3775         struct nfsclowner *owp;
3776         struct nfsclopen *op;
3777         int ret;
3778
3779         if (dp != NULL) {
3780                 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
3781                 if (ret)
3782                         return (ret);
3783         }
3784         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3785                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3786                         if (op->nfso_fhlen == fhlen &&
3787                             !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
3788                                 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
3789                                     own, lopp);
3790                                 if (ret)
3791                                         return (ret);
3792                         }
3793                 }
3794         }
3795         return (0);
3796 }
3797
3798 static int
3799 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
3800     u_int8_t *own, struct nfscllock **lopp)
3801 {
3802         struct nfscllockowner *lp;
3803         struct nfscllock *lop;
3804
3805         LIST_FOREACH(lp, lhp, nfsl_list) {
3806                 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
3807                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3808                                 if (lop->nfslo_first >= nlop->nfslo_end)
3809                                         break;
3810                                 if (lop->nfslo_end <= nlop->nfslo_first)
3811                                         continue;
3812                                 if (lop->nfslo_type == F_WRLCK ||
3813                                     nlop->nfslo_type == F_WRLCK ||
3814                                     nlop->nfslo_type == F_UNLCK) {
3815                                         if (lopp != NULL)
3816                                                 *lopp = lop;
3817                                         return (NFSERR_DENIED);
3818                                 }
3819                         }
3820                 }
3821         }
3822         return (0);
3823 }
3824
3825 /*
3826  * Check for a local conflicting lock.
3827  */
3828 APPLESTATIC int
3829 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
3830     u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
3831 {
3832         struct nfscllock *lop, nlck;
3833         struct nfscldeleg *dp;
3834         struct nfsnode *np;
3835         u_int8_t own[NFSV4CL_LOCKNAMELEN];
3836         int error;
3837
3838         nlck.nfslo_type = fl->l_type;
3839         nlck.nfslo_first = off;
3840         if (len == NFS64BITSSET) {
3841                 nlck.nfslo_end = NFS64BITSSET;
3842         } else {
3843                 nlck.nfslo_end = off + len;
3844                 if (nlck.nfslo_end <= nlck.nfslo_first)
3845                         return (NFSERR_INVAL);
3846         }
3847         np = VTONFS(vp);
3848         nfscl_filllockowner(id, own, flags);
3849         NFSLOCKCLSTATE();
3850         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3851         error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
3852             &nlck, own, dp, &lop);
3853         if (error != 0) {
3854                 fl->l_whence = SEEK_SET;
3855                 fl->l_start = lop->nfslo_first;
3856                 if (lop->nfslo_end == NFS64BITSSET)
3857                         fl->l_len = 0;
3858                 else
3859                         fl->l_len = lop->nfslo_end - lop->nfslo_first;
3860                 fl->l_pid = (pid_t)0;
3861                 fl->l_type = lop->nfslo_type;
3862                 error = -1;                     /* no RPC required */
3863         } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
3864             fl->l_type == F_RDLCK)) {
3865                 /*
3866                  * The delegation ensures that there isn't a conflicting
3867                  * lock on the server, so return -1 to indicate an RPC
3868                  * isn't required.
3869                  */
3870                 fl->l_type = F_UNLCK;
3871                 error = -1;
3872         }
3873         NFSUNLOCKCLSTATE();
3874         return (error);
3875 }
3876
3877 /*
3878  * Handle Recall of a delegation.
3879  * The clp must be exclusive locked when this is called.
3880  */
3881 static int
3882 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
3883     struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
3884     int called_from_renewthread)
3885 {
3886         struct nfsclowner *owp, *lowp, *nowp;
3887         struct nfsclopen *op, *lop;
3888         struct nfscllockowner *lp;
3889         struct nfscllock *lckp;
3890         struct nfsnode *np;
3891         int error = 0, ret, gotvp = 0;
3892
3893         if (vp == NULL) {
3894                 /*
3895                  * First, get a vnode for the file. This is needed to do RPCs.
3896                  */
3897                 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
3898                     dp->nfsdl_fhlen, p, &np);
3899                 if (ret) {
3900                         /*
3901                          * File isn't open, so nothing to move over to the
3902                          * server.
3903                          */
3904                         return (0);
3905                 }
3906                 vp = NFSTOV(np);
3907                 gotvp = 1;
3908         } else {
3909                 np = VTONFS(vp);
3910         }
3911         dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
3912
3913         /*
3914          * Ok, if it's a write delegation, flush data to the server, so
3915          * that close/open consistency is retained.
3916          */
3917         ret = 0;
3918         NFSLOCKNODE(np);
3919         if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
3920                 np->n_flag |= NDELEGRECALL;
3921                 NFSUNLOCKNODE(np);
3922                 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
3923                 NFSLOCKNODE(np);
3924                 np->n_flag &= ~NDELEGRECALL;
3925         }
3926         NFSINVALATTRCACHE(np);
3927         NFSUNLOCKNODE(np);
3928         if (ret == EIO && called_from_renewthread != 0) {
3929                 /*
3930                  * If the flush failed with EIO for the renew thread,
3931                  * return now, so that the dirty buffer will be flushed
3932                  * later.
3933                  */
3934                 if (gotvp != 0)
3935                         vrele(vp);
3936                 return (ret);
3937         }
3938
3939         /*
3940          * Now, for each openowner with opens issued locally, move them
3941          * over to state against the server.
3942          */
3943         LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
3944                 lop = LIST_FIRST(&lowp->nfsow_open);
3945                 if (lop != NULL) {
3946                         if (LIST_NEXT(lop, nfso_list) != NULL)
3947                                 panic("nfsdlg mult opens");
3948                         /*
3949                          * Look for the same openowner against the server.
3950                          */
3951                         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3952                                 if (!NFSBCMP(lowp->nfsow_owner,
3953                                     owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3954                                         newnfs_copycred(&dp->nfsdl_cred, cred);
3955                                         ret = nfscl_moveopen(vp, clp, nmp, lop,
3956                                             owp, dp, cred, p);
3957                                         if (ret == NFSERR_STALECLIENTID ||
3958                                             ret == NFSERR_STALEDONTRECOVER ||
3959                                             ret == NFSERR_BADSESSION) {
3960                                                 if (gotvp)
3961                                                         vrele(vp);
3962                                                 return (ret);
3963                                         }
3964                                         if (ret) {
3965                                                 nfscl_freeopen(lop, 1);
3966                                                 if (!error)
3967                                                         error = ret;
3968                                         }
3969                                         break;
3970                                 }
3971                         }
3972
3973                         /*
3974                          * If no openowner found, create one and get an open
3975                          * for it.
3976                          */
3977                         if (owp == NULL) {
3978                                 MALLOC(nowp, struct nfsclowner *,
3979                                     sizeof (struct nfsclowner), M_NFSCLOWNER,
3980                                     M_WAITOK);
3981                                 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
3982                                     NULL, lowp->nfsow_owner, dp->nfsdl_fh,
3983                                     dp->nfsdl_fhlen, NULL, NULL);
3984                                 newnfs_copycred(&dp->nfsdl_cred, cred);
3985                                 ret = nfscl_moveopen(vp, clp, nmp, lop,
3986                                     owp, dp, cred, p);
3987                                 if (ret) {
3988                                         nfscl_freeopenowner(owp, 0);
3989                                         if (ret == NFSERR_STALECLIENTID ||
3990                                             ret == NFSERR_STALEDONTRECOVER ||
3991                                             ret == NFSERR_BADSESSION) {
3992                                                 if (gotvp)
3993                                                         vrele(vp);
3994                                                 return (ret);
3995                                         }
3996                                         if (ret) {
3997                                                 nfscl_freeopen(lop, 1);
3998                                                 if (!error)
3999                                                         error = ret;
4000                                         }
4001                                 }
4002                         }
4003                 }
4004         }
4005
4006         /*
4007          * Now, get byte range locks for any locks done locally.
4008          */
4009         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4010                 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
4011                         newnfs_copycred(&dp->nfsdl_cred, cred);
4012                         ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
4013                         if (ret == NFSERR_STALESTATEID ||
4014                             ret == NFSERR_STALEDONTRECOVER ||
4015                             ret == NFSERR_STALECLIENTID ||
4016                             ret == NFSERR_BADSESSION) {
4017                                 if (gotvp)
4018                                         vrele(vp);
4019                                 return (ret);
4020                         }
4021                         if (ret && !error)
4022                                 error = ret;
4023                 }
4024         }
4025         if (gotvp)
4026                 vrele(vp);
4027         return (error);
4028 }
4029
4030 /*
4031  * Move a locally issued open over to an owner on the state list.
4032  * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
4033  * returns with it unlocked.
4034  */
4035 static int
4036 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4037     struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
4038     struct ucred *cred, NFSPROC_T *p)
4039 {
4040         struct nfsclopen *op, *nop;
4041         struct nfscldeleg *ndp;
4042         struct nfsnode *np;
4043         int error = 0, newone;
4044
4045         /*
4046          * First, look for an appropriate open, If found, just increment the
4047          * opencnt in it.
4048          */
4049         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
4050                 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
4051                     op->nfso_fhlen == lop->nfso_fhlen &&
4052                     !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
4053                         op->nfso_opencnt += lop->nfso_opencnt;
4054                         nfscl_freeopen(lop, 1);
4055                         return (0);
4056                 }
4057         }
4058
4059         /* No appropriate open, so we have to do one against the server. */
4060         np = VTONFS(vp);
4061         MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
4062             lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
4063         newone = 0;
4064         nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
4065             lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
4066         ndp = dp;
4067         error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
4068             lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
4069             NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
4070         if (error) {
4071                 if (newone)
4072                         nfscl_freeopen(op, 0);
4073         } else {
4074                 op->nfso_mode |= lop->nfso_mode;
4075                 op->nfso_opencnt += lop->nfso_opencnt;
4076                 nfscl_freeopen(lop, 1);
4077         }
4078         if (nop != NULL)
4079                 FREE((caddr_t)nop, M_NFSCLOPEN);
4080         if (ndp != NULL) {
4081                 /*
4082                  * What should I do with the returned delegation, since the
4083                  * delegation is being recalled? For now, just printf and
4084                  * through it away.
4085                  */
4086                 printf("Moveopen returned deleg\n");
4087                 FREE((caddr_t)ndp, M_NFSCLDELEG);
4088         }
4089         return (error);
4090 }
4091
4092 /*
4093  * Recall all delegations on this client.
4094  */
4095 static void
4096 nfscl_totalrecall(struct nfsclclient *clp)
4097 {
4098         struct nfscldeleg *dp;
4099
4100         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
4101                 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
4102                         dp->nfsdl_flags |= NFSCLDL_RECALL;
4103         }
4104 }
4105
4106 /*
4107  * Relock byte ranges. Called for delegation recall and state expiry.
4108  */
4109 static int
4110 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4111     struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
4112     NFSPROC_T *p)
4113 {
4114         struct nfscllockowner *nlp;
4115         struct nfsfh *nfhp;
4116         u_int64_t off, len;
4117         u_int32_t clidrev = 0;
4118         int error, newone, donelocally;
4119
4120         off = lop->nfslo_first;
4121         len = lop->nfslo_end - lop->nfslo_first;
4122         error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
4123             clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
4124             lp->nfsl_openowner, &nlp, &newone, &donelocally);
4125         if (error || donelocally)
4126                 return (error);
4127         if (nmp->nm_clp != NULL)
4128                 clidrev = nmp->nm_clp->nfsc_clientidrev;
4129         else
4130                 clidrev = 0;
4131         nfhp = VTONFS(vp)->n_fhp;
4132         error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
4133             nfhp->nfh_len, nlp, newone, 0, off,
4134             len, lop->nfslo_type, cred, p);
4135         if (error)
4136                 nfscl_freelockowner(nlp, 0);
4137         return (error);
4138 }
4139
4140 /*
4141  * Called to re-open a file. Basically get a vnode for the file handle
4142  * and then call nfsrpc_openrpc() to do the rest.
4143  */
4144 static int
4145 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
4146     u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
4147     struct ucred *cred, NFSPROC_T *p)
4148 {
4149         struct nfsnode *np;
4150         vnode_t vp;
4151         int error;
4152
4153         error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
4154         if (error)
4155                 return (error);
4156         vp = NFSTOV(np);
4157         if (np->n_v4 != NULL) {
4158                 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4159                     np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
4160                     NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
4161                     cred, p);
4162         } else {
4163                 error = EINVAL;
4164         }
4165         vrele(vp);
4166         return (error);
4167 }
4168
4169 /*
4170  * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
4171  * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
4172  * fail.
4173  */
4174 static int
4175 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4176     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
4177     u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
4178     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
4179 {
4180         int error;
4181
4182         do {
4183                 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
4184                     mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
4185                     0, 0);
4186                 if (error == NFSERR_DELAY)
4187                         (void) nfs_catnap(PZERO, error, "nfstryop");
4188         } while (error == NFSERR_DELAY);
4189         if (error == EAUTH || error == EACCES) {
4190                 /* Try again using system credentials */
4191                 newnfs_setroot(cred);
4192                 do {
4193                     error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
4194                         newfhlen, mode, op, name, namelen, ndpp, reclaim,
4195                         delegtype, cred, p, 1, 0);
4196                     if (error == NFSERR_DELAY)
4197                         (void) nfs_catnap(PZERO, error, "nfstryop");
4198                 } while (error == NFSERR_DELAY);
4199         }
4200         return (error);
4201 }
4202
4203 /*
4204  * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
4205  * NFSERR_DELAY. Also, retry with system credentials, if the provided
4206  * cred don't work.
4207  */
4208 static int
4209 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
4210     int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
4211     u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
4212 {
4213         struct nfsrv_descript nfsd, *nd = &nfsd;
4214         int error;
4215
4216         do {
4217                 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
4218                     reclaim, off, len, type, cred, p, 0);
4219                 if (!error && nd->nd_repstat == NFSERR_DELAY)
4220                         (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4221                             "nfstrylck");
4222         } while (!error && nd->nd_repstat == NFSERR_DELAY);
4223         if (!error)
4224                 error = nd->nd_repstat;
4225         if (error == EAUTH || error == EACCES) {
4226                 /* Try again using root credentials */
4227                 newnfs_setroot(cred);
4228                 do {
4229                         error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
4230                             newone, reclaim, off, len, type, cred, p, 1);
4231                         if (!error && nd->nd_repstat == NFSERR_DELAY)
4232                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4233                                     "nfstrylck");
4234                 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4235                 if (!error)
4236                         error = nd->nd_repstat;
4237         }
4238         return (error);
4239 }
4240
4241 /*
4242  * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
4243  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4244  * credentials fail.
4245  */
4246 static int
4247 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
4248     struct nfsmount *nmp, NFSPROC_T *p)
4249 {
4250         int error;
4251
4252         do {
4253                 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
4254                 if (error == NFSERR_DELAY)
4255                         (void) nfs_catnap(PZERO, error, "nfstrydp");
4256         } while (error == NFSERR_DELAY);
4257         if (error == EAUTH || error == EACCES) {
4258                 /* Try again using system credentials */
4259                 newnfs_setroot(cred);
4260                 do {
4261                         error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
4262                         if (error == NFSERR_DELAY)
4263                                 (void) nfs_catnap(PZERO, error, "nfstrydp");
4264                 } while (error == NFSERR_DELAY);
4265         }
4266         return (error);
4267 }
4268
4269 /*
4270  * Try a close against the server. Just call nfsrpc_closerpc(),
4271  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4272  * credentials fail.
4273  */
4274 APPLESTATIC int
4275 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
4276     struct nfsmount *nmp, NFSPROC_T *p)
4277 {
4278         struct nfsrv_descript nfsd, *nd = &nfsd;
4279         int error;
4280
4281         do {
4282                 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
4283                 if (error == NFSERR_DELAY)
4284                         (void) nfs_catnap(PZERO, error, "nfstrycl");
4285         } while (error == NFSERR_DELAY);
4286         if (error == EAUTH || error == EACCES) {
4287                 /* Try again using system credentials */
4288                 newnfs_setroot(cred);
4289                 do {
4290                         error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
4291                         if (error == NFSERR_DELAY)
4292                                 (void) nfs_catnap(PZERO, error, "nfstrycl");
4293                 } while (error == NFSERR_DELAY);
4294         }
4295         return (error);
4296 }
4297
4298 /*
4299  * Decide if a delegation on a file permits close without flushing writes
4300  * to the server. This might be a big performance win in some environments.
4301  * (Not useful until the client does caching on local stable storage.)
4302  */
4303 APPLESTATIC int
4304 nfscl_mustflush(vnode_t vp)
4305 {
4306         struct nfsclclient *clp;
4307         struct nfscldeleg *dp;
4308         struct nfsnode *np;
4309         struct nfsmount *nmp;
4310
4311         np = VTONFS(vp);
4312         nmp = VFSTONFS(vnode_mount(vp));
4313         if (!NFSHASNFSV4(nmp))
4314                 return (1);
4315         NFSLOCKCLSTATE();
4316         clp = nfscl_findcl(nmp);
4317         if (clp == NULL) {
4318                 NFSUNLOCKCLSTATE();
4319                 return (1);
4320         }
4321         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4322         if (dp != NULL && (dp->nfsdl_flags &
4323             (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
4324              NFSCLDL_WRITE &&
4325             (dp->nfsdl_sizelimit >= np->n_size ||
4326              !NFSHASSTRICT3530(nmp))) {
4327                 NFSUNLOCKCLSTATE();
4328                 return (0);
4329         }
4330         NFSUNLOCKCLSTATE();
4331         return (1);
4332 }
4333
4334 /*
4335  * See if a (write) delegation exists for this file.
4336  */
4337 APPLESTATIC int
4338 nfscl_nodeleg(vnode_t vp, int writedeleg)
4339 {
4340         struct nfsclclient *clp;
4341         struct nfscldeleg *dp;
4342         struct nfsnode *np;
4343         struct nfsmount *nmp;
4344
4345         np = VTONFS(vp);
4346         nmp = VFSTONFS(vnode_mount(vp));
4347         if (!NFSHASNFSV4(nmp))
4348                 return (1);
4349         NFSLOCKCLSTATE();
4350         clp = nfscl_findcl(nmp);
4351         if (clp == NULL) {
4352                 NFSUNLOCKCLSTATE();
4353                 return (1);
4354         }
4355         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4356         if (dp != NULL &&
4357             (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
4358             (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
4359              NFSCLDL_WRITE)) {
4360                 NFSUNLOCKCLSTATE();
4361                 return (0);
4362         }
4363         NFSUNLOCKCLSTATE();
4364         return (1);
4365 }
4366
4367 /*
4368  * Look for an associated delegation that should be DelegReturned.
4369  */
4370 APPLESTATIC int
4371 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
4372 {
4373         struct nfsclclient *clp;
4374         struct nfscldeleg *dp;
4375         struct nfsclowner *owp;
4376         struct nfscllockowner *lp;
4377         struct nfsmount *nmp;
4378         struct ucred *cred;
4379         struct nfsnode *np;
4380         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4381
4382         nmp = VFSTONFS(vnode_mount(vp));
4383         np = VTONFS(vp);
4384         NFSLOCKCLSTATE();
4385         /*
4386          * Loop around waiting for:
4387          * - outstanding I/O operations on delegations to complete
4388          * - for a delegation on vp that has state, lock the client and
4389          *   do a recall
4390          * - return delegation with no state
4391          */
4392         while (1) {
4393                 clp = nfscl_findcl(nmp);
4394                 if (clp == NULL) {
4395                         NFSUNLOCKCLSTATE();
4396                         return (retcnt);
4397                 }
4398                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4399                     np->n_fhp->nfh_len);
4400                 if (dp != NULL) {
4401                     /*
4402                      * Wait for outstanding I/O ops to be done.
4403                      */
4404                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4405                         if (igotlock) {
4406                             nfsv4_unlock(&clp->nfsc_lock, 0);
4407                             igotlock = 0;
4408                         }
4409                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4410                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4411                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4412                         continue;
4413                     }
4414                     needsrecall = 0;
4415                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4416                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4417                             needsrecall = 1;
4418                             break;
4419                         }
4420                     }
4421                     if (!needsrecall) {
4422                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4423                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4424                                 needsrecall = 1;
4425                                 break;
4426                             }
4427                         }
4428                     }
4429                     if (needsrecall && !triedrecall) {
4430                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4431                         islept = 0;
4432                         while (!igotlock) {
4433                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4434                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4435                             if (islept)
4436                                 break;
4437                         }
4438                         if (islept)
4439                             continue;
4440                         NFSUNLOCKCLSTATE();
4441                         cred = newnfs_getcred();
4442                         newnfs_copycred(&dp->nfsdl_cred, cred);
4443                         (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
4444                         NFSFREECRED(cred);
4445                         triedrecall = 1;
4446                         NFSLOCKCLSTATE();
4447                         nfsv4_unlock(&clp->nfsc_lock, 0);
4448                         igotlock = 0;
4449                         continue;
4450                     }
4451                     *stp = dp->nfsdl_stateid;
4452                     retcnt = 1;
4453                     nfscl_cleandeleg(dp);
4454                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4455                 }
4456                 if (igotlock)
4457                     nfsv4_unlock(&clp->nfsc_lock, 0);
4458                 NFSUNLOCKCLSTATE();
4459                 return (retcnt);
4460         }
4461 }
4462
4463 /*
4464  * Look for associated delegation(s) that should be DelegReturned.
4465  */
4466 APPLESTATIC int
4467 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
4468     nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
4469 {
4470         struct nfsclclient *clp;
4471         struct nfscldeleg *dp;
4472         struct nfsclowner *owp;
4473         struct nfscllockowner *lp;
4474         struct nfsmount *nmp;
4475         struct ucred *cred;
4476         struct nfsnode *np;
4477         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4478
4479         nmp = VFSTONFS(vnode_mount(fvp));
4480         *gotfdp = 0;
4481         *gottdp = 0;
4482         NFSLOCKCLSTATE();
4483         /*
4484          * Loop around waiting for:
4485          * - outstanding I/O operations on delegations to complete
4486          * - for a delegation on fvp that has state, lock the client and
4487          *   do a recall
4488          * - return delegation(s) with no state.
4489          */
4490         while (1) {
4491                 clp = nfscl_findcl(nmp);
4492                 if (clp == NULL) {
4493                         NFSUNLOCKCLSTATE();
4494                         return (retcnt);
4495                 }
4496                 np = VTONFS(fvp);
4497                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4498                     np->n_fhp->nfh_len);
4499                 if (dp != NULL && *gotfdp == 0) {
4500                     /*
4501                      * Wait for outstanding I/O ops to be done.
4502                      */
4503                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4504                         if (igotlock) {
4505                             nfsv4_unlock(&clp->nfsc_lock, 0);
4506                             igotlock = 0;
4507                         }
4508                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4509                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4510                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4511                         continue;
4512                     }
4513                     needsrecall = 0;
4514                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4515                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4516                             needsrecall = 1;
4517                             break;
4518                         }
4519                     }
4520                     if (!needsrecall) {
4521                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4522                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4523                                 needsrecall = 1;
4524                                 break;
4525                             }
4526                         }
4527                     }
4528                     if (needsrecall && !triedrecall) {
4529                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4530                         islept = 0;
4531                         while (!igotlock) {
4532                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4533                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4534                             if (islept)
4535                                 break;
4536                         }
4537                         if (islept)
4538                             continue;
4539                         NFSUNLOCKCLSTATE();
4540                         cred = newnfs_getcred();
4541                         newnfs_copycred(&dp->nfsdl_cred, cred);
4542                         (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
4543                         NFSFREECRED(cred);
4544                         triedrecall = 1;
4545                         NFSLOCKCLSTATE();
4546                         nfsv4_unlock(&clp->nfsc_lock, 0);
4547                         igotlock = 0;
4548                         continue;
4549                     }
4550                     *fstp = dp->nfsdl_stateid;
4551                     retcnt++;
4552                     *gotfdp = 1;
4553                     nfscl_cleandeleg(dp);
4554                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4555                 }
4556                 if (igotlock) {
4557                     nfsv4_unlock(&clp->nfsc_lock, 0);
4558                     igotlock = 0;
4559                 }
4560                 if (tvp != NULL) {
4561                     np = VTONFS(tvp);
4562                     dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4563                         np->n_fhp->nfh_len);
4564                     if (dp != NULL && *gottdp == 0) {
4565                         /*
4566                          * Wait for outstanding I/O ops to be done.
4567                          */
4568                         if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4569                             dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4570                             (void) nfsmsleep(&dp->nfsdl_rwlock,
4571                                 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4572                             continue;
4573                         }
4574                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4575                             if (!LIST_EMPTY(&owp->nfsow_open)) {
4576                                 NFSUNLOCKCLSTATE();
4577                                 return (retcnt);
4578                             }
4579                         }
4580                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4581                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4582                                 NFSUNLOCKCLSTATE();
4583                                 return (retcnt);
4584                             }
4585                         }
4586                         *tstp = dp->nfsdl_stateid;
4587                         retcnt++;
4588                         *gottdp = 1;
4589                         nfscl_cleandeleg(dp);
4590                         nfscl_freedeleg(&clp->nfsc_deleg, dp);
4591                     }
4592                 }
4593                 NFSUNLOCKCLSTATE();
4594                 return (retcnt);
4595         }
4596 }
4597
4598 /*
4599  * Get a reference on the clientid associated with the mount point.
4600  * Return 1 if success, 0 otherwise.
4601  */
4602 APPLESTATIC int
4603 nfscl_getref(struct nfsmount *nmp)
4604 {
4605         struct nfsclclient *clp;
4606
4607         NFSLOCKCLSTATE();
4608         clp = nfscl_findcl(nmp);
4609         if (clp == NULL) {
4610                 NFSUNLOCKCLSTATE();
4611                 return (0);
4612         }
4613         nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
4614         NFSUNLOCKCLSTATE();
4615         return (1);
4616 }
4617
4618 /*
4619  * Release a reference on a clientid acquired with the above call.
4620  */
4621 APPLESTATIC void
4622 nfscl_relref(struct nfsmount *nmp)
4623 {
4624         struct nfsclclient *clp;
4625
4626         NFSLOCKCLSTATE();
4627         clp = nfscl_findcl(nmp);
4628         if (clp == NULL) {
4629                 NFSUNLOCKCLSTATE();
4630                 return;
4631         }
4632         nfsv4_relref(&clp->nfsc_lock);
4633         NFSUNLOCKCLSTATE();
4634 }
4635
4636 /*
4637  * Save the size attribute in the delegation, since the nfsnode
4638  * is going away.
4639  */
4640 APPLESTATIC void
4641 nfscl_reclaimnode(vnode_t vp)
4642 {
4643         struct nfsclclient *clp;
4644         struct nfscldeleg *dp;
4645         struct nfsnode *np = VTONFS(vp);
4646         struct nfsmount *nmp;
4647
4648         nmp = VFSTONFS(vnode_mount(vp));
4649         if (!NFSHASNFSV4(nmp))
4650                 return;
4651         NFSLOCKCLSTATE();
4652         clp = nfscl_findcl(nmp);
4653         if (clp == NULL) {
4654                 NFSUNLOCKCLSTATE();
4655                 return;
4656         }
4657         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4658         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4659                 dp->nfsdl_size = np->n_size;
4660         NFSUNLOCKCLSTATE();
4661 }
4662
4663 /*
4664  * Get the saved size attribute in the delegation, since it is a
4665  * newly allocated nfsnode.
4666  */
4667 APPLESTATIC void
4668 nfscl_newnode(vnode_t vp)
4669 {
4670         struct nfsclclient *clp;
4671         struct nfscldeleg *dp;
4672         struct nfsnode *np = VTONFS(vp);
4673         struct nfsmount *nmp;
4674
4675         nmp = VFSTONFS(vnode_mount(vp));
4676         if (!NFSHASNFSV4(nmp))
4677                 return;
4678         NFSLOCKCLSTATE();
4679         clp = nfscl_findcl(nmp);
4680         if (clp == NULL) {
4681                 NFSUNLOCKCLSTATE();
4682                 return;
4683         }
4684         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4685         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4686                 np->n_size = dp->nfsdl_size;
4687         NFSUNLOCKCLSTATE();
4688 }
4689
4690 /*
4691  * If there is a valid write delegation for this file, set the modtime
4692  * to the local clock time.
4693  */
4694 APPLESTATIC void
4695 nfscl_delegmodtime(vnode_t vp)
4696 {
4697         struct nfsclclient *clp;
4698         struct nfscldeleg *dp;
4699         struct nfsnode *np = VTONFS(vp);
4700         struct nfsmount *nmp;
4701
4702         nmp = VFSTONFS(vnode_mount(vp));
4703         if (!NFSHASNFSV4(nmp))
4704                 return;
4705         NFSLOCKCLSTATE();
4706         clp = nfscl_findcl(nmp);
4707         if (clp == NULL) {
4708                 NFSUNLOCKCLSTATE();
4709                 return;
4710         }
4711         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4712         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
4713                 nanotime(&dp->nfsdl_modtime);
4714                 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
4715         }
4716         NFSUNLOCKCLSTATE();
4717 }
4718
4719 /*
4720  * If there is a valid write delegation for this file with a modtime set,
4721  * put that modtime in mtime.
4722  */
4723 APPLESTATIC void
4724 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
4725 {
4726         struct nfsclclient *clp;
4727         struct nfscldeleg *dp;
4728         struct nfsnode *np = VTONFS(vp);
4729         struct nfsmount *nmp;
4730
4731         nmp = VFSTONFS(vnode_mount(vp));
4732         if (!NFSHASNFSV4(nmp))
4733                 return;
4734         NFSLOCKCLSTATE();
4735         clp = nfscl_findcl(nmp);
4736         if (clp == NULL) {
4737                 NFSUNLOCKCLSTATE();
4738                 return;
4739         }
4740         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4741         if (dp != NULL &&
4742             (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
4743             (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
4744                 *mtime = dp->nfsdl_modtime;
4745         NFSUNLOCKCLSTATE();
4746 }
4747
4748 static int
4749 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
4750 {
4751         short *defaulterrp, *errp;
4752
4753         if (!nd->nd_repstat)
4754                 return (0);
4755         if (nd->nd_procnum == NFSPROC_NOOP)
4756                 return (txdr_unsigned(nd->nd_repstat & 0xffff));
4757         if (nd->nd_repstat == EBADRPC)
4758                 return (txdr_unsigned(NFSERR_BADXDR));
4759         if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
4760             nd->nd_repstat == NFSERR_OPILLEGAL)
4761                 return (txdr_unsigned(nd->nd_repstat));
4762         if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
4763             minorvers > NFSV4_MINORVERSION) {
4764                 /* NFSv4.n error. */
4765                 return (txdr_unsigned(nd->nd_repstat));
4766         }
4767         if (nd->nd_procnum < NFSV4OP_CBNOPS)
4768                 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
4769         else
4770                 return (txdr_unsigned(nd->nd_repstat));
4771         while (*++errp)
4772                 if (*errp == (short)nd->nd_repstat)
4773                         return (txdr_unsigned(nd->nd_repstat));
4774         return (txdr_unsigned(*defaulterrp));
4775 }
4776
4777 /*
4778  * Called to find/add a layout to a client.
4779  * This function returns the layout with a refcnt (shared lock) upon
4780  * success (returns 0) or with no lock/refcnt on the layout when an
4781  * error is returned.
4782  * If a layout is passed in via lypp, it is locked (exclusively locked).
4783  */
4784 APPLESTATIC int
4785 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4786     nfsv4stateid_t *stateidp, int layouttype, int retonclose,
4787     struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
4788     struct ucred *cred, NFSPROC_T *p)
4789 {
4790         struct nfsclclient *clp;
4791         struct nfscllayout *lyp, *tlyp;
4792         struct nfsclflayout *flp;
4793         struct nfsnode *np = VTONFS(vp);
4794         mount_t mp;
4795         int layout_passed_in;
4796
4797         mp = nmp->nm_mountp;
4798         layout_passed_in = 1;
4799         tlyp = NULL;
4800         lyp = *lypp;
4801         if (lyp == NULL) {
4802                 layout_passed_in = 0;
4803                 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
4804                     M_WAITOK | M_ZERO);
4805         }
4806
4807         NFSLOCKCLSTATE();
4808         clp = nmp->nm_clp;
4809         if (clp == NULL) {
4810                 if (layout_passed_in != 0)
4811                         nfsv4_unlock(&lyp->nfsly_lock, 0);
4812                 NFSUNLOCKCLSTATE();
4813                 if (tlyp != NULL)
4814                         free(tlyp, M_NFSLAYOUT);
4815                 return (EPERM);
4816         }
4817         if (lyp == NULL) {
4818                 /*
4819                  * Although no lyp was passed in, another thread might have
4820                  * allocated one. If one is found, just increment it's ref
4821                  * count and return it.
4822                  */
4823                 lyp = nfscl_findlayout(clp, fhp, fhlen);
4824                 if (lyp == NULL) {
4825                         lyp = tlyp;
4826                         tlyp = NULL;
4827                         lyp->nfsly_stateid.seqid = stateidp->seqid;
4828                         lyp->nfsly_stateid.other[0] = stateidp->other[0];
4829                         lyp->nfsly_stateid.other[1] = stateidp->other[1];
4830                         lyp->nfsly_stateid.other[2] = stateidp->other[2];
4831                         lyp->nfsly_lastbyte = 0;
4832                         LIST_INIT(&lyp->nfsly_flayread);
4833                         LIST_INIT(&lyp->nfsly_flayrw);
4834                         LIST_INIT(&lyp->nfsly_recall);
4835                         lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
4836                         lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
4837                         lyp->nfsly_clp = clp;
4838                         if (layouttype == NFSLAYOUT_FLEXFILE)
4839                                 lyp->nfsly_flags = NFSLY_FLEXFILE;
4840                         else
4841                                 lyp->nfsly_flags = NFSLY_FILES;
4842                         if (retonclose != 0)
4843                                 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
4844                         lyp->nfsly_fhlen = fhlen;
4845                         NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
4846                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4847                         LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
4848                             nfsly_hash);
4849                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4850                         nfscl_layoutcnt++;
4851                 } else {
4852                         if (retonclose != 0)
4853                                 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
4854                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4855                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4856                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4857                 }
4858                 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
4859                 if (NFSCL_FORCEDISM(mp)) {
4860                         NFSUNLOCKCLSTATE();
4861                         if (tlyp != NULL)
4862                                 free(tlyp, M_NFSLAYOUT);
4863                         return (EPERM);
4864                 }
4865                 *lypp = lyp;
4866         } else
4867                 lyp->nfsly_stateid.seqid = stateidp->seqid;
4868
4869         /* Merge the new list of File Layouts into the list. */
4870         flp = LIST_FIRST(fhlp);
4871         if (flp != NULL) {
4872                 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
4873                         nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
4874                 else
4875                         nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
4876         }
4877         if (layout_passed_in != 0)
4878                 nfsv4_unlock(&lyp->nfsly_lock, 1);
4879         NFSUNLOCKCLSTATE();
4880         if (tlyp != NULL)
4881                 free(tlyp, M_NFSLAYOUT);
4882         return (0);
4883 }
4884
4885 /*
4886  * Search for a layout by MDS file handle.
4887  * If one is found, it is returned with a refcnt (shared lock) iff
4888  * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
4889  * returned NULL.
4890  */
4891 struct nfscllayout *
4892 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
4893     uint64_t off, struct nfsclflayout **retflpp, int *recalledp)
4894 {
4895         struct nfscllayout *lyp;
4896         mount_t mp;
4897         int error, igotlock;
4898
4899         mp = clp->nfsc_nmp->nm_mountp;
4900         *recalledp = 0;
4901         *retflpp = NULL;
4902         NFSLOCKCLSTATE();
4903         lyp = nfscl_findlayout(clp, fhp, fhlen);
4904         if (lyp != NULL) {
4905                 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
4906                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4907                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4908                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4909                         error = nfscl_findlayoutforio(lyp, off,
4910                             NFSV4OPEN_ACCESSREAD, retflpp);
4911                         if (error == 0)
4912                                 nfsv4_getref(&lyp->nfsly_lock, NULL,
4913                                     NFSCLSTATEMUTEXPTR, mp);
4914                         else {
4915                                 do {
4916                                         igotlock = nfsv4_lock(&lyp->nfsly_lock,
4917                                             1, NULL, NFSCLSTATEMUTEXPTR, mp);
4918                                 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
4919                                 *retflpp = NULL;
4920                         }
4921                         if (NFSCL_FORCEDISM(mp)) {
4922                                 lyp = NULL;
4923                                 *recalledp = 1;
4924                         }
4925                 } else {
4926                         lyp = NULL;
4927                         *recalledp = 1;
4928                 }
4929         }
4930         NFSUNLOCKCLSTATE();
4931         return (lyp);
4932 }
4933
4934 /*
4935  * Search for a layout by MDS file handle. If one is found, mark in to be
4936  * recalled, if it already marked "return on close".
4937  */
4938 static void
4939 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
4940     int fhlen, struct nfsclrecalllayout **recallpp)
4941 {
4942         struct nfscllayout *lyp;
4943         uint32_t iomode;
4944
4945         if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) ||
4946             nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
4947             (VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
4948                 return;
4949         lyp = nfscl_findlayout(clp, fhp, fhlen);
4950         if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE |
4951             NFSLY_RECALL)) == NFSLY_RETONCLOSE) {
4952                 iomode = 0;
4953                 if (!LIST_EMPTY(&lyp->nfsly_flayread))
4954                         iomode |= NFSLAYOUTIOMODE_READ;
4955                 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
4956                         iomode |= NFSLAYOUTIOMODE_RW;
4957                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
4958                     0, UINT64_MAX, lyp->nfsly_stateid.seqid, *recallpp);
4959                 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
4960                 *recallpp = NULL;
4961         }
4962 }
4963
4964 /*
4965  * Dereference a layout.
4966  */
4967 void
4968 nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
4969 {
4970
4971         NFSLOCKCLSTATE();
4972         if (exclocked != 0)
4973                 nfsv4_unlock(&lyp->nfsly_lock, 0);
4974         else
4975                 nfsv4_relref(&lyp->nfsly_lock);
4976         NFSUNLOCKCLSTATE();
4977 }
4978
4979 /*
4980  * Search for a devinfo by deviceid. If one is found, return it after
4981  * acquiring a reference count on it.
4982  */
4983 struct nfscldevinfo *
4984 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
4985     struct nfscldevinfo *dip)
4986 {
4987
4988         NFSLOCKCLSTATE();
4989         if (dip == NULL)
4990                 dip = nfscl_finddevinfo(clp, deviceid);
4991         if (dip != NULL)
4992                 dip->nfsdi_refcnt++;
4993         NFSUNLOCKCLSTATE();
4994         return (dip);
4995 }
4996
4997 /*
4998  * Dereference a devinfo structure.
4999  */
5000 static void
5001 nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
5002 {
5003
5004         dip->nfsdi_refcnt--;
5005         if (dip->nfsdi_refcnt == 0)
5006                 wakeup(&dip->nfsdi_refcnt);
5007 }
5008
5009 /*
5010  * Dereference a devinfo structure.
5011  */
5012 void
5013 nfscl_reldevinfo(struct nfscldevinfo *dip)
5014 {
5015
5016         NFSLOCKCLSTATE();
5017         nfscl_reldevinfo_locked(dip);
5018         NFSUNLOCKCLSTATE();
5019 }
5020
5021 /*
5022  * Find a layout for this file handle. Return NULL upon failure.
5023  */
5024 static struct nfscllayout *
5025 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
5026 {
5027         struct nfscllayout *lyp;
5028
5029         LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
5030                 if (lyp->nfsly_fhlen == fhlen &&
5031                     !NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
5032                         break;
5033         return (lyp);
5034 }
5035
5036 /*
5037  * Find a devinfo for this deviceid. Return NULL upon failure.
5038  */
5039 static struct nfscldevinfo *
5040 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
5041 {
5042         struct nfscldevinfo *dip;
5043
5044         LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
5045                 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
5046                     == 0)
5047                         break;
5048         return (dip);
5049 }
5050
5051 /*
5052  * Merge the new file layout list into the main one, maintaining it in
5053  * increasing offset order.
5054  */
5055 static void
5056 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
5057     struct nfsclflayouthead *newfhlp)
5058 {
5059         struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
5060
5061         flp = LIST_FIRST(fhlp);
5062         prevflp = NULL;
5063         LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
5064                 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
5065                         prevflp = flp;
5066                         flp = LIST_NEXT(flp, nfsfl_list);
5067                 }
5068                 if (prevflp == NULL)
5069                         LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
5070                 else
5071                         LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
5072                 prevflp = nflp;
5073         }
5074 }
5075
5076 /*
5077  * Add this nfscldevinfo to the client, if it doesn't already exist.
5078  * This function consumes the structure pointed at by dip, if not NULL.
5079  */
5080 APPLESTATIC int
5081 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip,
5082     struct nfsclflayout *flp)
5083 {
5084         struct nfsclclient *clp;
5085         struct nfscldevinfo *tdip;
5086         uint8_t *dev;
5087
5088         NFSLOCKCLSTATE();
5089         clp = nmp->nm_clp;
5090         if (clp == NULL) {
5091                 NFSUNLOCKCLSTATE();
5092                 if (dip != NULL)
5093                         free(dip, M_NFSDEVINFO);
5094                 return (ENODEV);
5095         }
5096         if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5097                 dev = flp->nfsfl_dev;
5098         else
5099                 dev = flp->nfsfl_ffm[0].dev;
5100         tdip = nfscl_finddevinfo(clp, dev);
5101         if (tdip != NULL) {
5102                 tdip->nfsdi_layoutrefs++;
5103                 flp->nfsfl_devp = tdip;
5104                 nfscl_reldevinfo_locked(tdip);
5105                 NFSUNLOCKCLSTATE();
5106                 if (dip != NULL)
5107                         free(dip, M_NFSDEVINFO);
5108                 return (0);
5109         }
5110         if (dip != NULL) {
5111                 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
5112                 dip->nfsdi_layoutrefs = 1;
5113                 flp->nfsfl_devp = dip;
5114         }
5115         NFSUNLOCKCLSTATE();
5116         if (dip == NULL)
5117                 return (ENODEV);
5118         return (0);
5119 }
5120
5121 /*
5122  * Free up a layout structure and associated file layout structure(s).
5123  */
5124 APPLESTATIC void
5125 nfscl_freelayout(struct nfscllayout *layp)
5126 {
5127         struct nfsclflayout *flp, *nflp;
5128         struct nfsclrecalllayout *rp, *nrp;
5129
5130         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
5131                 LIST_REMOVE(flp, nfsfl_list);
5132                 nfscl_freeflayout(flp);
5133         }
5134         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
5135                 LIST_REMOVE(flp, nfsfl_list);
5136                 nfscl_freeflayout(flp);
5137         }
5138         LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
5139                 LIST_REMOVE(rp, nfsrecly_list);
5140                 free(rp, M_NFSLAYRECALL);
5141         }
5142         nfscl_layoutcnt--;
5143         free(layp, M_NFSLAYOUT);
5144 }
5145
5146 /*
5147  * Free up a file layout structure.
5148  */
5149 APPLESTATIC void
5150 nfscl_freeflayout(struct nfsclflayout *flp)
5151 {
5152         int i, j;
5153
5154         if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5155                 for (i = 0; i < flp->nfsfl_fhcnt; i++)
5156                         free(flp->nfsfl_fh[i], M_NFSFH);
5157         if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0)
5158                 for (i = 0; i < flp->nfsfl_mirrorcnt; i++)
5159                         for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++)
5160                                 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH);
5161         if (flp->nfsfl_devp != NULL)
5162                 flp->nfsfl_devp->nfsdi_layoutrefs--;
5163         free(flp, M_NFSFLAYOUT);
5164 }
5165
5166 /*
5167  * Free up a file layout devinfo structure.
5168  */
5169 APPLESTATIC void
5170 nfscl_freedevinfo(struct nfscldevinfo *dip)
5171 {
5172
5173         free(dip, M_NFSDEVINFO);
5174 }
5175
5176 /*
5177  * Mark any layouts that match as recalled.
5178  */
5179 static int
5180 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
5181     uint64_t off, uint64_t len, uint32_t stateseqid,
5182     struct nfsclrecalllayout *recallp)
5183 {
5184         struct nfsclrecalllayout *rp, *orp;
5185
5186         recallp->nfsrecly_recalltype = recalltype;
5187         recallp->nfsrecly_iomode = iomode;
5188         recallp->nfsrecly_stateseqid = stateseqid;
5189         recallp->nfsrecly_off = off;
5190         recallp->nfsrecly_len = len;
5191         /*
5192          * Order the list as file returns first, followed by fsid and any
5193          * returns, both in increasing stateseqid order.
5194          * Note that the seqids wrap around, so 1 is after 0xffffffff.
5195          * (I'm not sure this is correct because I find RFC5661 confusing
5196          *  on this, but hopefully it will work ok.)
5197          */
5198         orp = NULL;
5199         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5200                 orp = rp;
5201                 if ((recalltype == NFSLAYOUTRETURN_FILE &&
5202                      (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
5203                       nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
5204                     (recalltype != NFSLAYOUTRETURN_FILE &&
5205                      rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
5206                      nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
5207                         LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
5208                         break;
5209                 }
5210         }
5211         if (rp == NULL) {
5212                 if (orp == NULL)
5213                         LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
5214                             nfsrecly_list);
5215                 else
5216                         LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
5217         }
5218         lyp->nfsly_flags |= NFSLY_RECALL;
5219         return (0);
5220 }
5221
5222 /*
5223  * Compare the two seqids for ordering. The trick is that the seqids can
5224  * wrap around from 0xffffffff->0, so check for the cases where one
5225  * has wrapped around.
5226  * Return 1 if seqid1 comes before seqid2, 0 otherwise.
5227  */
5228 static int
5229 nfscl_seq(uint32_t seqid1, uint32_t seqid2)
5230 {
5231
5232         if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
5233                 /* seqid2 has wrapped around. */
5234                 return (0);
5235         if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
5236                 /* seqid1 has wrapped around. */
5237                 return (1);
5238         if (seqid1 <= seqid2)
5239                 return (1);
5240         return (0);
5241 }
5242
5243 /*
5244  * Do a layout return for each of the recalls.
5245  */
5246 static void
5247 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
5248     struct ucred *cred, NFSPROC_T *p)
5249 {
5250         struct nfsclrecalllayout *rp;
5251         nfsv4stateid_t stateid;
5252         int layouttype;
5253
5254         NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
5255         stateid.seqid = lyp->nfsly_stateid.seqid;
5256         if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5257                 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5258         else
5259                 layouttype = NFSLAYOUT_FLEXFILE;
5260         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5261                 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
5262                     lyp->nfsly_fhlen, 0, layouttype,
5263                     rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
5264                     rp->nfsrecly_off, rp->nfsrecly_len,
5265                     &stateid, cred, p, NULL);
5266         }
5267 }
5268
5269 /*
5270  * Do the layout commit for a file layout.
5271  */
5272 static void
5273 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
5274     struct ucred *cred, NFSPROC_T *p)
5275 {
5276         struct nfsclflayout *flp;
5277         uint64_t len;
5278         int error, layouttype;
5279
5280         if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5281                 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5282         else
5283                 layouttype = NFSLAYOUT_FLEXFILE;
5284         LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
5285                 if (layouttype == NFSLAYOUT_FLEXFILE &&
5286                     (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) {
5287                         NFSCL_DEBUG(4, "Flex file: no layoutcommit\n");
5288                         /* If not supported, don't bother doing it. */
5289                         NFSLOCKMNT(nmp);
5290                         nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5291                         NFSUNLOCKMNT(nmp);
5292                         break;
5293                 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
5294                         len = flp->nfsfl_end - flp->nfsfl_off;
5295                         error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
5296                             lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
5297                             lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
5298                             layouttype, cred, p, NULL);
5299                         NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
5300                         if (error == NFSERR_NOTSUPP) {
5301                                 /* If not supported, don't bother doing it. */
5302                                 NFSLOCKMNT(nmp);
5303                                 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5304                                 NFSUNLOCKMNT(nmp);
5305                                 break;
5306                         }
5307                 }
5308         }
5309 }
5310
5311 /*
5312  * Commit all layouts for a file (vnode).
5313  */
5314 int
5315 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
5316 {
5317         struct nfsclclient *clp;
5318         struct nfscllayout *lyp;
5319         struct nfsnode *np = VTONFS(vp);
5320         mount_t mp;
5321         struct nfsmount *nmp;
5322
5323         mp = vnode_mount(vp);
5324         nmp = VFSTONFS(mp);
5325         if (NFSHASNOLAYOUTCOMMIT(nmp))
5326                 return (0);
5327         NFSLOCKCLSTATE();
5328         clp = nmp->nm_clp;
5329         if (clp == NULL) {
5330                 NFSUNLOCKCLSTATE();
5331                 return (EPERM);
5332         }
5333         lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5334         if (lyp == NULL) {
5335                 NFSUNLOCKCLSTATE();
5336                 return (EPERM);
5337         }
5338         nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5339         if (NFSCL_FORCEDISM(mp)) {
5340                 NFSUNLOCKCLSTATE();
5341                 return (EPERM);
5342         }
5343 tryagain:
5344         if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
5345                 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
5346                 NFSUNLOCKCLSTATE();
5347                 NFSCL_DEBUG(4, "do layoutcommit2\n");
5348                 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
5349                 NFSLOCKCLSTATE();
5350                 goto tryagain;
5351         }
5352         nfsv4_relref(&lyp->nfsly_lock);
5353         NFSUNLOCKCLSTATE();
5354         return (0);
5355 }
5356