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
1631         /* Now, all the OpenOwners, etc. */
1632         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1633                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1634                         nfscl_freeopen(op, 0);
1635                 }
1636                 nfscl_freeopenowner(owp, 0);
1637         }
1638 }
1639
1640 /*
1641  * Called when an NFSERR_EXPIRED is received from the server.
1642  */
1643 static void
1644 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1645     struct ucred *cred, NFSPROC_T *p)
1646 {
1647         struct nfsclowner *owp, *nowp, *towp;
1648         struct nfsclopen *op, *nop, *top;
1649         struct nfscldeleg *dp, *ndp;
1650         int ret, printed = 0;
1651
1652         /*
1653          * First, merge locally issued Opens into the list for the server.
1654          */
1655         dp = TAILQ_FIRST(&clp->nfsc_deleg);
1656         while (dp != NULL) {
1657             ndp = TAILQ_NEXT(dp, nfsdl_list);
1658             owp = LIST_FIRST(&dp->nfsdl_owner);
1659             while (owp != NULL) {
1660                 nowp = LIST_NEXT(owp, nfsow_list);
1661                 op = LIST_FIRST(&owp->nfsow_open);
1662                 if (op != NULL) {
1663                     if (LIST_NEXT(op, nfso_list) != NULL)
1664                         panic("nfsclexp");
1665                     LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1666                         if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1667                             NFSV4CL_LOCKNAMELEN))
1668                             break;
1669                     }
1670                     if (towp != NULL) {
1671                         /* Merge opens in */
1672                         LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1673                             if (top->nfso_fhlen == op->nfso_fhlen &&
1674                                 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1675                                  op->nfso_fhlen)) {
1676                                 top->nfso_mode |= op->nfso_mode;
1677                                 top->nfso_opencnt += op->nfso_opencnt;
1678                                 break;
1679                             }
1680                         }
1681                         if (top == NULL) {
1682                             /* Just add the open to the owner list */
1683                             LIST_REMOVE(op, nfso_list);
1684                             op->nfso_own = towp;
1685                             LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1686                             nfsstatsv1.cllocalopens--;
1687                             nfsstatsv1.clopens++;
1688                         }
1689                     } else {
1690                         /* Just add the openowner to the client list */
1691                         LIST_REMOVE(owp, nfsow_list);
1692                         owp->nfsow_clp = clp;
1693                         LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1694                         nfsstatsv1.cllocalopenowners--;
1695                         nfsstatsv1.clopenowners++;
1696                         nfsstatsv1.cllocalopens--;
1697                         nfsstatsv1.clopens++;
1698                     }
1699                 }
1700                 owp = nowp;
1701             }
1702             if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1703                 printed = 1;
1704                 printf("nfsv4 expired locks lost\n");
1705             }
1706             nfscl_cleandeleg(dp);
1707             nfscl_freedeleg(&clp->nfsc_deleg, dp);
1708             dp = ndp;
1709         }
1710         if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1711             panic("nfsclexp");
1712
1713         /*
1714          * Now, try and reopen against the server.
1715          */
1716         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1717                 owp->nfsow_seqid = 0;
1718                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1719                         ret = nfscl_expireopen(clp, op, nmp, cred, p);
1720                         if (ret && !printed) {
1721                                 printed = 1;
1722                                 printf("nfsv4 expired locks lost\n");
1723                         }
1724                 }
1725                 if (LIST_EMPTY(&owp->nfsow_open))
1726                         nfscl_freeopenowner(owp, 0);
1727         }
1728 }
1729
1730 /*
1731  * This function must be called after the process represented by "own" has
1732  * exited. Must be called with CLSTATE lock held.
1733  */
1734 static void
1735 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1736 {
1737         struct nfsclowner *owp, *nowp;
1738         struct nfscllockowner *lp, *nlp;
1739         struct nfscldeleg *dp;
1740
1741         /* First, get rid of local locks on delegations. */
1742         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1743                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1744                     if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1745                         if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1746                             panic("nfscllckw");
1747                         nfscl_freelockowner(lp, 1);
1748                     }
1749                 }
1750         }
1751         owp = LIST_FIRST(&clp->nfsc_owner);
1752         while (owp != NULL) {
1753                 nowp = LIST_NEXT(owp, nfsow_list);
1754                 if (!NFSBCMP(owp->nfsow_owner, own,
1755                     NFSV4CL_LOCKNAMELEN)) {
1756                         /*
1757                          * If there are children that haven't closed the
1758                          * file descriptors yet, the opens will still be
1759                          * here. For that case, let the renew thread clear
1760                          * out the OpenOwner later.
1761                          */
1762                         if (LIST_EMPTY(&owp->nfsow_open))
1763                                 nfscl_freeopenowner(owp, 0);
1764                         else
1765                                 owp->nfsow_defunct = 1;
1766                 }
1767                 owp = nowp;
1768         }
1769 }
1770
1771 /*
1772  * Find open/lock owners for processes that have exited.
1773  */
1774 static void
1775 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1776 {
1777         struct nfsclowner *owp, *nowp;
1778         struct nfsclopen *op;
1779         struct nfscllockowner *lp, *nlp;
1780         struct nfscldeleg *dp;
1781
1782         NFSPROCLISTLOCK();
1783         NFSLOCKCLSTATE();
1784         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1785                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1786                         LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1787                                 if (LIST_EMPTY(&lp->nfsl_lock))
1788                                         nfscl_emptylockowner(lp, lhp);
1789                         }
1790                 }
1791                 if (nfscl_procdoesntexist(owp->nfsow_owner))
1792                         nfscl_cleanup_common(clp, owp->nfsow_owner);
1793         }
1794
1795         /*
1796          * For the single open_owner case, these lock owners need to be
1797          * checked to see if they still exist separately.
1798          * This is because nfscl_procdoesntexist() never returns true for
1799          * the single open_owner so that the above doesn't ever call
1800          * nfscl_cleanup_common().
1801          */
1802         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1803                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1804                         if (nfscl_procdoesntexist(lp->nfsl_owner))
1805                                 nfscl_cleanup_common(clp, lp->nfsl_owner);
1806                 }
1807         }
1808         NFSUNLOCKCLSTATE();
1809         NFSPROCLISTUNLOCK();
1810 }
1811
1812 /*
1813  * Take the empty lock owner and move it to the local lhp list if the
1814  * associated process no longer exists.
1815  */
1816 static void
1817 nfscl_emptylockowner(struct nfscllockowner *lp,
1818     struct nfscllockownerfhhead *lhp)
1819 {
1820         struct nfscllockownerfh *lfhp, *mylfhp;
1821         struct nfscllockowner *nlp;
1822         int fnd_it;
1823
1824         /* If not a Posix lock owner, just return. */
1825         if ((lp->nfsl_lockflags & F_POSIX) == 0)
1826                 return;
1827
1828         fnd_it = 0;
1829         mylfhp = NULL;
1830         /*
1831          * First, search to see if this lock owner is already in the list.
1832          * If it is, then the associated process no longer exists.
1833          */
1834         SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
1835                 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
1836                     !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
1837                     lfhp->nfslfh_len))
1838                         mylfhp = lfhp;
1839                 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
1840                         if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
1841                             NFSV4CL_LOCKNAMELEN))
1842                                 fnd_it = 1;
1843         }
1844         /* If not found, check if process still exists. */
1845         if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
1846                 return;
1847
1848         /* Move the lock owner over to the local list. */
1849         if (mylfhp == NULL) {
1850                 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
1851                     M_NOWAIT);
1852                 if (mylfhp == NULL)
1853                         return;
1854                 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
1855                 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
1856                     mylfhp->nfslfh_len);
1857                 LIST_INIT(&mylfhp->nfslfh_lock);
1858                 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
1859         }
1860         LIST_REMOVE(lp, nfsl_list);
1861         LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
1862 }
1863
1864 static int      fake_global;    /* Used to force visibility of MNTK_UNMOUNTF */
1865 /*
1866  * Called from nfs umount to free up the clientid.
1867  */
1868 APPLESTATIC void
1869 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
1870 {
1871         struct nfsclclient *clp;
1872         struct ucred *cred;
1873         int igotlock;
1874
1875         /*
1876          * For the case that matters, this is the thread that set
1877          * MNTK_UNMOUNTF, so it will see it set. The code that follows is
1878          * done to ensure that any thread executing nfscl_getcl() after
1879          * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
1880          * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
1881          * explanation, courtesy of Alan Cox.
1882          * What follows is a snippet from Alan Cox's email at:
1883          * http://docs.FreeBSD.org/cgi/
1884          *     mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
1885          *
1886          * 1. Set MNTK_UNMOUNTF
1887          * 2. Acquire a standard FreeBSD mutex "m".
1888          * 3. Update some data structures.
1889          * 4. Release mutex "m".
1890          *
1891          * Then, other threads that acquire "m" after step 4 has occurred will
1892          * see MNTK_UNMOUNTF as set.  But, other threads that beat thread X to
1893          * step 2 may or may not see MNTK_UNMOUNTF as set.
1894          */
1895         NFSLOCKCLSTATE();
1896         if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
1897                 fake_global++;
1898                 NFSUNLOCKCLSTATE();
1899                 NFSLOCKCLSTATE();
1900         }
1901
1902         clp = nmp->nm_clp;
1903         if (clp != NULL) {
1904                 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
1905                         panic("nfscl umount");
1906
1907                 /*
1908                  * First, handshake with the nfscl renew thread, to terminate
1909                  * it.
1910                  */
1911                 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
1912                 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
1913                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
1914                             "nfsclumnt", hz);
1915
1916                 /*
1917                  * Now, get the exclusive lock on the client state, so
1918                  * that no uses of the state are still in progress.
1919                  */
1920                 do {
1921                         igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1922                             NFSCLSTATEMUTEXPTR, NULL);
1923                 } while (!igotlock);
1924                 NFSUNLOCKCLSTATE();
1925
1926                 /*
1927                  * Free up all the state. It will expire on the server, but
1928                  * maybe we should do a SetClientId/SetClientIdConfirm so
1929                  * the server throws it away?
1930                  */
1931                 LIST_REMOVE(clp, nfsc_list);
1932                 nfscl_delegreturnall(clp, p);
1933                 cred = newnfs_getcred();
1934                 if (NFSHASNFSV4N(nmp)) {
1935                         (void)nfsrpc_destroysession(nmp, clp, cred, p);
1936                         (void)nfsrpc_destroyclient(nmp, clp, cred, p);
1937                 } else
1938                         (void)nfsrpc_setclient(nmp, clp, 0, cred, p);
1939                 nfscl_cleanclient(clp);
1940                 nmp->nm_clp = NULL;
1941                 NFSFREECRED(cred);
1942                 free(clp, M_NFSCLCLIENT);
1943         } else
1944                 NFSUNLOCKCLSTATE();
1945 }
1946
1947 /*
1948  * This function is called when a server replies with NFSERR_STALECLIENTID
1949  * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
1950  * doing Opens and Locks with reclaim. If these fail, it deletes the
1951  * corresponding state.
1952  */
1953 static void
1954 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
1955 {
1956         struct nfsclowner *owp, *nowp;
1957         struct nfsclopen *op, *nop;
1958         struct nfscllockowner *lp, *nlp;
1959         struct nfscllock *lop, *nlop;
1960         struct nfscldeleg *dp, *ndp, *tdp;
1961         struct nfsmount *nmp;
1962         struct ucred *tcred;
1963         struct nfsclopenhead extra_open;
1964         struct nfscldeleghead extra_deleg;
1965         struct nfsreq *rep;
1966         u_int64_t len;
1967         u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
1968         int i, igotlock = 0, error, trycnt, firstlock;
1969         struct nfscllayout *lyp, *nlyp;
1970
1971         /*
1972          * First, lock the client structure, so everyone else will
1973          * block when trying to use state.
1974          */
1975         NFSLOCKCLSTATE();
1976         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
1977         do {
1978                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1979                     NFSCLSTATEMUTEXPTR, NULL);
1980         } while (!igotlock);
1981         NFSUNLOCKCLSTATE();
1982
1983         nmp = clp->nfsc_nmp;
1984         if (nmp == NULL)
1985                 panic("nfscl recover");
1986
1987         /*
1988          * For now, just get rid of all layouts. There may be a need
1989          * to do LayoutCommit Ops with reclaim == true later.
1990          */
1991         TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
1992                 nfscl_freelayout(lyp);
1993         TAILQ_INIT(&clp->nfsc_layout);
1994         for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
1995                 LIST_INIT(&clp->nfsc_layouthash[i]);
1996
1997         trycnt = 5;
1998         do {
1999                 error = nfsrpc_setclient(nmp, clp, 1, cred, p);
2000         } while ((error == NFSERR_STALECLIENTID ||
2001              error == NFSERR_BADSESSION ||
2002              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2003         if (error) {
2004                 NFSLOCKCLSTATE();
2005                 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
2006                     NFSCLFLAGS_RECVRINPROG);
2007                 wakeup(&clp->nfsc_flags);
2008                 nfsv4_unlock(&clp->nfsc_lock, 0);
2009                 NFSUNLOCKCLSTATE();
2010                 return;
2011         }
2012         clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2013         clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2014
2015         /*
2016          * Mark requests already queued on the server, so that they don't
2017          * initiate another recovery cycle. Any requests already in the
2018          * queue that handle state information will have the old stale
2019          * clientid/stateid and will get a NFSERR_STALESTATEID,
2020          * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
2021          * This will be translated to NFSERR_STALEDONTRECOVER when
2022          * R_DONTRECOVER is set.
2023          */
2024         NFSLOCKREQ();
2025         TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
2026                 if (rep->r_nmp == nmp)
2027                         rep->r_flags |= R_DONTRECOVER;
2028         }
2029         NFSUNLOCKREQ();
2030
2031         /*
2032          * Now, mark all delegations "need reclaim".
2033          */
2034         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
2035                 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
2036
2037         TAILQ_INIT(&extra_deleg);
2038         LIST_INIT(&extra_open);
2039         /*
2040          * Now traverse the state lists, doing Open and Lock Reclaims.
2041          */
2042         tcred = newnfs_getcred();
2043         owp = LIST_FIRST(&clp->nfsc_owner);
2044         while (owp != NULL) {
2045             nowp = LIST_NEXT(owp, nfsow_list);
2046             owp->nfsow_seqid = 0;
2047             op = LIST_FIRST(&owp->nfsow_open);
2048             while (op != NULL) {
2049                 nop = LIST_NEXT(op, nfso_list);
2050                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2051                     /* Search for a delegation to reclaim with the open */
2052                     TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2053                         if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2054                             continue;
2055                         if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2056                             mode = NFSV4OPEN_ACCESSWRITE;
2057                             delegtype = NFSV4OPEN_DELEGATEWRITE;
2058                         } else {
2059                             mode = NFSV4OPEN_ACCESSREAD;
2060                             delegtype = NFSV4OPEN_DELEGATEREAD;
2061                         }
2062                         if ((op->nfso_mode & mode) == mode &&
2063                             op->nfso_fhlen == dp->nfsdl_fhlen &&
2064                             !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
2065                             break;
2066                     }
2067                     ndp = dp;
2068                     if (dp == NULL)
2069                         delegtype = NFSV4OPEN_DELEGATENONE;
2070                     newnfs_copycred(&op->nfso_cred, tcred);
2071                     error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
2072                         op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
2073                         op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
2074                         tcred, p);
2075                     if (!error) {
2076                         /* Handle any replied delegation */
2077                         if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
2078                             || NFSMNT_RDONLY(nmp->nm_mountp))) {
2079                             if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
2080                                 mode = NFSV4OPEN_ACCESSWRITE;
2081                             else
2082                                 mode = NFSV4OPEN_ACCESSREAD;
2083                             TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2084                                 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2085                                     continue;
2086                                 if ((op->nfso_mode & mode) == mode &&
2087                                     op->nfso_fhlen == dp->nfsdl_fhlen &&
2088                                     !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
2089                                     op->nfso_fhlen)) {
2090                                     dp->nfsdl_stateid = ndp->nfsdl_stateid;
2091                                     dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
2092                                     dp->nfsdl_ace = ndp->nfsdl_ace;
2093                                     dp->nfsdl_change = ndp->nfsdl_change;
2094                                     dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2095                                     if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
2096                                         dp->nfsdl_flags |= NFSCLDL_RECALL;
2097                                     FREE((caddr_t)ndp, M_NFSCLDELEG);
2098                                     ndp = NULL;
2099                                     break;
2100                                 }
2101                             }
2102                         }
2103                         if (ndp != NULL)
2104                             TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
2105
2106                         /* and reclaim all byte range locks */
2107                         lp = LIST_FIRST(&op->nfso_lock);
2108                         while (lp != NULL) {
2109                             nlp = LIST_NEXT(lp, nfsl_list);
2110                             lp->nfsl_seqid = 0;
2111                             firstlock = 1;
2112                             lop = LIST_FIRST(&lp->nfsl_lock);
2113                             while (lop != NULL) {
2114                                 nlop = LIST_NEXT(lop, nfslo_list);
2115                                 if (lop->nfslo_end == NFS64BITSSET)
2116                                     len = NFS64BITSSET;
2117                                 else
2118                                     len = lop->nfslo_end - lop->nfslo_first;
2119                                 error = nfscl_trylock(nmp, NULL,
2120                                     op->nfso_fh, op->nfso_fhlen, lp,
2121                                     firstlock, 1, lop->nfslo_first, len,
2122                                     lop->nfslo_type, tcred, p);
2123                                 if (error != 0)
2124                                     nfscl_freelock(lop, 0);
2125                                 else
2126                                     firstlock = 0;
2127                                 lop = nlop;
2128                             }
2129                             /* If no locks, but a lockowner, just delete it. */
2130                             if (LIST_EMPTY(&lp->nfsl_lock))
2131                                 nfscl_freelockowner(lp, 0);
2132                             lp = nlp;
2133                         }
2134                     }
2135                 }
2136                 if (error != 0 && error != NFSERR_BADSESSION)
2137                     nfscl_freeopen(op, 0);
2138                 op = nop;
2139             }
2140             owp = nowp;
2141         }
2142
2143         /*
2144          * Now, try and get any delegations not yet reclaimed by cobbling
2145          * to-gether an appropriate open.
2146          */
2147         nowp = NULL;
2148         dp = TAILQ_FIRST(&clp->nfsc_deleg);
2149         while (dp != NULL) {
2150             ndp = TAILQ_NEXT(dp, nfsdl_list);
2151             if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2152                 if (nowp == NULL) {
2153                     MALLOC(nowp, struct nfsclowner *,
2154                         sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2155                     /*
2156                      * Name must be as long an largest possible
2157                      * NFSV4CL_LOCKNAMELEN. 12 for now.
2158                      */
2159                     NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2160                         NFSV4CL_LOCKNAMELEN);
2161                     LIST_INIT(&nowp->nfsow_open);
2162                     nowp->nfsow_clp = clp;
2163                     nowp->nfsow_seqid = 0;
2164                     nowp->nfsow_defunct = 0;
2165                     nfscl_lockinit(&nowp->nfsow_rwlock);
2166                 }
2167                 nop = NULL;
2168                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2169                     MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
2170                         dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2171                     nop->nfso_own = nowp;
2172                     if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2173                         nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2174                         delegtype = NFSV4OPEN_DELEGATEWRITE;
2175                     } else {
2176                         nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2177                         delegtype = NFSV4OPEN_DELEGATEREAD;
2178                     }
2179                     nop->nfso_opencnt = 0;
2180                     nop->nfso_posixlock = 1;
2181                     nop->nfso_fhlen = dp->nfsdl_fhlen;
2182                     NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2183                     LIST_INIT(&nop->nfso_lock);
2184                     nop->nfso_stateid.seqid = 0;
2185                     nop->nfso_stateid.other[0] = 0;
2186                     nop->nfso_stateid.other[1] = 0;
2187                     nop->nfso_stateid.other[2] = 0;
2188                     newnfs_copycred(&dp->nfsdl_cred, tcred);
2189                     newnfs_copyincred(tcred, &nop->nfso_cred);
2190                     tdp = NULL;
2191                     error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2192                         nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2193                         nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2194                         delegtype, tcred, p);
2195                     if (tdp != NULL) {
2196                         if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2197                             mode = NFSV4OPEN_ACCESSWRITE;
2198                         else
2199                             mode = NFSV4OPEN_ACCESSREAD;
2200                         if ((nop->nfso_mode & mode) == mode &&
2201                             nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2202                             !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2203                             nop->nfso_fhlen)) {
2204                             dp->nfsdl_stateid = tdp->nfsdl_stateid;
2205                             dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2206                             dp->nfsdl_ace = tdp->nfsdl_ace;
2207                             dp->nfsdl_change = tdp->nfsdl_change;
2208                             dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2209                             if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2210                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
2211                             FREE((caddr_t)tdp, M_NFSCLDELEG);
2212                         } else {
2213                             TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2214                         }
2215                     }
2216                 }
2217                 if (error) {
2218                     if (nop != NULL)
2219                         FREE((caddr_t)nop, M_NFSCLOPEN);
2220                     /*
2221                      * Couldn't reclaim it, so throw the state
2222                      * away. Ouch!!
2223                      */
2224                     nfscl_cleandeleg(dp);
2225                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
2226                 } else {
2227                     LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2228                 }
2229             }
2230             dp = ndp;
2231         }
2232
2233         /*
2234          * Now, get rid of extra Opens and Delegations.
2235          */
2236         LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2237                 do {
2238                         newnfs_copycred(&op->nfso_cred, tcred);
2239                         error = nfscl_tryclose(op, tcred, nmp, p);
2240                         if (error == NFSERR_GRACE)
2241                                 (void) nfs_catnap(PZERO, error, "nfsexcls");
2242                 } while (error == NFSERR_GRACE);
2243                 LIST_REMOVE(op, nfso_list);
2244                 FREE((caddr_t)op, M_NFSCLOPEN);
2245         }
2246         if (nowp != NULL)
2247                 FREE((caddr_t)nowp, M_NFSCLOWNER);
2248
2249         TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2250                 do {
2251                         newnfs_copycred(&dp->nfsdl_cred, tcred);
2252                         error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2253                         if (error == NFSERR_GRACE)
2254                                 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2255                 } while (error == NFSERR_GRACE);
2256                 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2257                 FREE((caddr_t)dp, M_NFSCLDELEG);
2258         }
2259
2260         /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
2261         if (NFSHASNFSV4N(nmp))
2262                 (void)nfsrpc_reclaimcomplete(nmp, cred, p);
2263
2264         NFSLOCKCLSTATE();
2265         clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2266         wakeup(&clp->nfsc_flags);
2267         nfsv4_unlock(&clp->nfsc_lock, 0);
2268         NFSUNLOCKCLSTATE();
2269         NFSFREECRED(tcred);
2270 }
2271
2272 /*
2273  * This function is called when a server replies with NFSERR_EXPIRED.
2274  * It deletes all state for the client and does a fresh SetClientId/confirm.
2275  * XXX Someday it should post a signal to the process(es) that hold the
2276  * state, so they know that lock state has been lost.
2277  */
2278 APPLESTATIC int
2279 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2280 {
2281         struct nfsmount *nmp;
2282         struct ucred *cred;
2283         int igotlock = 0, error, trycnt;
2284
2285         /*
2286          * If the clientid has gone away or a new SetClientid has already
2287          * been done, just return ok.
2288          */
2289         if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2290                 return (0);
2291
2292         /*
2293          * First, lock the client structure, so everyone else will
2294          * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2295          * that only one thread does the work.
2296          */
2297         NFSLOCKCLSTATE();
2298         clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2299         do {
2300                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2301                     NFSCLSTATEMUTEXPTR, NULL);
2302         } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2303         if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2304                 if (igotlock)
2305                         nfsv4_unlock(&clp->nfsc_lock, 0);
2306                 NFSUNLOCKCLSTATE();
2307                 return (0);
2308         }
2309         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2310         NFSUNLOCKCLSTATE();
2311
2312         nmp = clp->nfsc_nmp;
2313         if (nmp == NULL)
2314                 panic("nfscl expired");
2315         cred = newnfs_getcred();
2316         trycnt = 5;
2317         do {
2318                 error = nfsrpc_setclient(nmp, clp, 0, cred, p);
2319         } while ((error == NFSERR_STALECLIENTID ||
2320              error == NFSERR_BADSESSION ||
2321              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2322         if (error) {
2323                 NFSLOCKCLSTATE();
2324                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2325         } else {
2326                 /*
2327                  * Expire the state for the client.
2328                  */
2329                 nfscl_expireclient(clp, nmp, cred, p);
2330                 NFSLOCKCLSTATE();
2331                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2332                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2333         }
2334         clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2335         wakeup(&clp->nfsc_flags);
2336         nfsv4_unlock(&clp->nfsc_lock, 0);
2337         NFSUNLOCKCLSTATE();
2338         NFSFREECRED(cred);
2339         return (error);
2340 }
2341
2342 /*
2343  * This function inserts a lock in the list after insert_lop.
2344  */
2345 static void
2346 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2347     struct nfscllock *insert_lop, int local)
2348 {
2349
2350         if ((struct nfscllockowner *)insert_lop == lp)
2351                 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2352         else
2353                 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2354         if (local)
2355                 nfsstatsv1.cllocallocks++;
2356         else
2357                 nfsstatsv1.cllocks++;
2358 }
2359
2360 /*
2361  * This function updates the locking for a lock owner and given file. It
2362  * maintains a list of lock ranges ordered on increasing file offset that
2363  * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2364  * It always adds new_lop to the list and sometimes uses the one pointed
2365  * at by other_lopp.
2366  * Returns 1 if the locks were modified, 0 otherwise.
2367  */
2368 static int
2369 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2370     struct nfscllock **other_lopp, int local)
2371 {
2372         struct nfscllock *new_lop = *new_lopp;
2373         struct nfscllock *lop, *tlop, *ilop;
2374         struct nfscllock *other_lop;
2375         int unlock = 0, modified = 0;
2376         u_int64_t tmp;
2377
2378         /*
2379          * Work down the list until the lock is merged.
2380          */
2381         if (new_lop->nfslo_type == F_UNLCK)
2382                 unlock = 1;
2383         ilop = (struct nfscllock *)lp;
2384         lop = LIST_FIRST(&lp->nfsl_lock);
2385         while (lop != NULL) {
2386             /*
2387              * Only check locks for this file that aren't before the start of
2388              * new lock's range.
2389              */
2390             if (lop->nfslo_end >= new_lop->nfslo_first) {
2391                 if (new_lop->nfslo_end < lop->nfslo_first) {
2392                     /*
2393                      * If the new lock ends before the start of the
2394                      * current lock's range, no merge, just insert
2395                      * the new lock.
2396                      */
2397                     break;
2398                 }
2399                 if (new_lop->nfslo_type == lop->nfslo_type ||
2400                     (new_lop->nfslo_first <= lop->nfslo_first &&
2401                      new_lop->nfslo_end >= lop->nfslo_end)) {
2402                     /*
2403                      * This lock can be absorbed by the new lock/unlock.
2404                      * This happens when it covers the entire range
2405                      * of the old lock or is contiguous
2406                      * with the old lock and is of the same type or an
2407                      * unlock.
2408                      */
2409                     if (new_lop->nfslo_type != lop->nfslo_type ||
2410                         new_lop->nfslo_first != lop->nfslo_first ||
2411                         new_lop->nfslo_end != lop->nfslo_end)
2412                         modified = 1;
2413                     if (lop->nfslo_first < new_lop->nfslo_first)
2414                         new_lop->nfslo_first = lop->nfslo_first;
2415                     if (lop->nfslo_end > new_lop->nfslo_end)
2416                         new_lop->nfslo_end = lop->nfslo_end;
2417                     tlop = lop;
2418                     lop = LIST_NEXT(lop, nfslo_list);
2419                     nfscl_freelock(tlop, local);
2420                     continue;
2421                 }
2422
2423                 /*
2424                  * All these cases are for contiguous locks that are not the
2425                  * same type, so they can't be merged.
2426                  */
2427                 if (new_lop->nfslo_first <= lop->nfslo_first) {
2428                     /*
2429                      * This case is where the new lock overlaps with the
2430                      * first part of the old lock. Move the start of the
2431                      * old lock to just past the end of the new lock. The
2432                      * new lock will be inserted in front of the old, since
2433                      * ilop hasn't been updated. (We are done now.)
2434                      */
2435                     if (lop->nfslo_first != new_lop->nfslo_end) {
2436                         lop->nfslo_first = new_lop->nfslo_end;
2437                         modified = 1;
2438                     }
2439                     break;
2440                 }
2441                 if (new_lop->nfslo_end >= lop->nfslo_end) {
2442                     /*
2443                      * This case is where the new lock overlaps with the
2444                      * end of the old lock's range. Move the old lock's
2445                      * end to just before the new lock's first and insert
2446                      * the new lock after the old lock.
2447                      * Might not be done yet, since the new lock could
2448                      * overlap further locks with higher ranges.
2449                      */
2450                     if (lop->nfslo_end != new_lop->nfslo_first) {
2451                         lop->nfslo_end = new_lop->nfslo_first;
2452                         modified = 1;
2453                     }
2454                     ilop = lop;
2455                     lop = LIST_NEXT(lop, nfslo_list);
2456                     continue;
2457                 }
2458                 /*
2459                  * The final case is where the new lock's range is in the
2460                  * middle of the current lock's and splits the current lock
2461                  * up. Use *other_lopp to handle the second part of the
2462                  * split old lock range. (We are done now.)
2463                  * For unlock, we use new_lop as other_lop and tmp, since
2464                  * other_lop and new_lop are the same for this case.
2465                  * We noted the unlock case above, so we don't need
2466                  * new_lop->nfslo_type any longer.
2467                  */
2468                 tmp = new_lop->nfslo_first;
2469                 if (unlock) {
2470                     other_lop = new_lop;
2471                     *new_lopp = NULL;
2472                 } else {
2473                     other_lop = *other_lopp;
2474                     *other_lopp = NULL;
2475                 }
2476                 other_lop->nfslo_first = new_lop->nfslo_end;
2477                 other_lop->nfslo_end = lop->nfslo_end;
2478                 other_lop->nfslo_type = lop->nfslo_type;
2479                 lop->nfslo_end = tmp;
2480                 nfscl_insertlock(lp, other_lop, lop, local);
2481                 ilop = lop;
2482                 modified = 1;
2483                 break;
2484             }
2485             ilop = lop;
2486             lop = LIST_NEXT(lop, nfslo_list);
2487             if (lop == NULL)
2488                 break;
2489         }
2490
2491         /*
2492          * Insert the new lock in the list at the appropriate place.
2493          */
2494         if (!unlock) {
2495                 nfscl_insertlock(lp, new_lop, ilop, local);
2496                 *new_lopp = NULL;
2497                 modified = 1;
2498         }
2499         return (modified);
2500 }
2501
2502 /*
2503  * This function must be run as a kernel thread.
2504  * It does Renew Ops and recovery, when required.
2505  */
2506 APPLESTATIC void
2507 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2508 {
2509         struct nfsclowner *owp, *nowp;
2510         struct nfsclopen *op;
2511         struct nfscllockowner *lp, *nlp;
2512         struct nfscldeleghead dh;
2513         struct nfscldeleg *dp, *ndp;
2514         struct ucred *cred;
2515         u_int32_t clidrev;
2516         int error, cbpathdown, islept, igotlock, ret, clearok;
2517         uint32_t recover_done_time = 0;
2518         time_t mytime;
2519         static time_t prevsec = 0;
2520         struct nfscllockownerfh *lfhp, *nlfhp;
2521         struct nfscllockownerfhhead lfh;
2522         struct nfscllayout *lyp, *nlyp;
2523         struct nfscldevinfo *dip, *ndip;
2524         struct nfscllayouthead rlh;
2525         struct nfsclrecalllayout *recallp;
2526         struct nfsclds *dsp;
2527
2528         cred = newnfs_getcred();
2529         NFSLOCKCLSTATE();
2530         clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2531         NFSUNLOCKCLSTATE();
2532         for(;;) {
2533                 newnfs_setroot(cred);
2534                 cbpathdown = 0;
2535                 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2536                         /*
2537                          * Only allow one recover within 1/2 of the lease
2538                          * duration (nfsc_renew).
2539                          */
2540                         if (recover_done_time < NFSD_MONOSEC) {
2541                                 recover_done_time = NFSD_MONOSEC +
2542                                     clp->nfsc_renew;
2543                                 NFSCL_DEBUG(1, "Doing recovery..\n");
2544                                 nfscl_recover(clp, cred, p);
2545                         } else {
2546                                 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n",
2547                                     recover_done_time, (intmax_t)NFSD_MONOSEC);
2548                                 NFSLOCKCLSTATE();
2549                                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2550                                 NFSUNLOCKCLSTATE();
2551                         }
2552                 }
2553                 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2554                     (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2555                         clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2556                         clidrev = clp->nfsc_clientidrev;
2557                         error = nfsrpc_renew(clp, NULL, cred, p);
2558                         if (error == NFSERR_CBPATHDOWN)
2559                             cbpathdown = 1;
2560                         else if (error == NFSERR_STALECLIENTID ||
2561                             error == NFSERR_BADSESSION) {
2562                             NFSLOCKCLSTATE();
2563                             clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2564                             NFSUNLOCKCLSTATE();
2565                         } else if (error == NFSERR_EXPIRED)
2566                             (void) nfscl_hasexpired(clp, clidrev, p);
2567                 }
2568
2569 checkdsrenew:
2570                 if (NFSHASNFSV4N(clp->nfsc_nmp)) {
2571                         /* Do renews for any DS sessions. */
2572                         NFSLOCKMNT(clp->nfsc_nmp);
2573                         /* Skip first entry, since the MDS is handled above. */
2574                         dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
2575                         if (dsp != NULL)
2576                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2577                         while (dsp != NULL) {
2578                                 if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
2579                                     dsp->nfsclds_sess.nfsess_defunct == 0) {
2580                                         dsp->nfsclds_expire = NFSD_MONOSEC +
2581                                             clp->nfsc_renew;
2582                                         NFSUNLOCKMNT(clp->nfsc_nmp);
2583                                         (void)nfsrpc_renew(clp, dsp, cred, p);
2584                                         goto checkdsrenew;
2585                                 }
2586                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2587                         }
2588                         NFSUNLOCKMNT(clp->nfsc_nmp);
2589                 }
2590
2591                 TAILQ_INIT(&dh);
2592                 NFSLOCKCLSTATE();
2593                 if (cbpathdown)
2594                         /* It's a Total Recall! */
2595                         nfscl_totalrecall(clp);
2596
2597                 /*
2598                  * Now, handle defunct owners.
2599                  */
2600                 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2601                         if (LIST_EMPTY(&owp->nfsow_open)) {
2602                                 if (owp->nfsow_defunct != 0)
2603                                         nfscl_freeopenowner(owp, 0);
2604                         }
2605                 }
2606
2607                 /*
2608                  * Do the recall on any delegations. To avoid trouble, always
2609                  * come back up here after having slept.
2610                  */
2611                 igotlock = 0;
2612 tryagain:
2613                 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2614                 while (dp != NULL) {
2615                         ndp = TAILQ_NEXT(dp, nfsdl_list);
2616                         if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2617                                 /*
2618                                  * Wait for outstanding I/O ops to be done.
2619                                  */
2620                                 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2621                                     if (igotlock) {
2622                                         nfsv4_unlock(&clp->nfsc_lock, 0);
2623                                         igotlock = 0;
2624                                     }
2625                                     dp->nfsdl_rwlock.nfslock_lock |=
2626                                         NFSV4LOCK_WANTED;
2627                                     (void) nfsmsleep(&dp->nfsdl_rwlock,
2628                                         NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
2629                                         NULL);
2630                                     goto tryagain;
2631                                 }
2632                                 while (!igotlock) {
2633                                     igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2634                                         &islept, NFSCLSTATEMUTEXPTR, NULL);
2635                                     if (islept)
2636                                         goto tryagain;
2637                                 }
2638                                 NFSUNLOCKCLSTATE();
2639                                 newnfs_copycred(&dp->nfsdl_cred, cred);
2640                                 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2641                                     NULL, cred, p, 1);
2642                                 if (!ret) {
2643                                     nfscl_cleandeleg(dp);
2644                                     TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2645                                         nfsdl_list);
2646                                     LIST_REMOVE(dp, nfsdl_hash);
2647                                     TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2648                                     nfscl_delegcnt--;
2649                                     nfsstatsv1.cldelegates--;
2650                                 }
2651                                 NFSLOCKCLSTATE();
2652                         }
2653                         dp = ndp;
2654                 }
2655
2656                 /*
2657                  * Clear out old delegations, if we are above the high water
2658                  * mark. Only clear out ones with no state related to them.
2659                  * The tailq list is in LRU order.
2660                  */
2661                 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2662                 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2663                     ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2664                     if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2665                         dp->nfsdl_rwlock.nfslock_lock == 0 &&
2666                         dp->nfsdl_timestamp < NFSD_MONOSEC &&
2667                         (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2668                           NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2669                         clearok = 1;
2670                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2671                             op = LIST_FIRST(&owp->nfsow_open);
2672                             if (op != NULL) {
2673                                 clearok = 0;
2674                                 break;
2675                             }
2676                         }
2677                         if (clearok) {
2678                             LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2679                                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2680                                     clearok = 0;
2681                                     break;
2682                                 }
2683                             }
2684                         }
2685                         if (clearok) {
2686                             TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2687                             LIST_REMOVE(dp, nfsdl_hash);
2688                             TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2689                             nfscl_delegcnt--;
2690                             nfsstatsv1.cldelegates--;
2691                         }
2692                     }
2693                     dp = ndp;
2694                 }
2695                 if (igotlock)
2696                         nfsv4_unlock(&clp->nfsc_lock, 0);
2697
2698                 /*
2699                  * Do the recall on any layouts. To avoid trouble, always
2700                  * come back up here after having slept.
2701                  */
2702                 TAILQ_INIT(&rlh);
2703 tryagain2:
2704                 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
2705                         if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
2706                                 /*
2707                                  * Wait for outstanding I/O ops to be done.
2708                                  */
2709                                 if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
2710                                     (lyp->nfsly_lock.nfslock_lock &
2711                                      NFSV4LOCK_LOCK) != 0) {
2712                                         lyp->nfsly_lock.nfslock_lock |=
2713                                             NFSV4LOCK_WANTED;
2714                                         (void)nfsmsleep(&lyp->nfsly_lock,
2715                                             NFSCLSTATEMUTEXPTR, PZERO, "nfslyp",
2716                                             NULL);
2717                                         goto tryagain2;
2718                                 }
2719                                 /* Move the layout to the recall list. */
2720                                 TAILQ_REMOVE(&clp->nfsc_layout, lyp,
2721                                     nfsly_list);
2722                                 LIST_REMOVE(lyp, nfsly_hash);
2723                                 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
2724
2725                                 /* Handle any layout commits. */
2726                                 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
2727                                     (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
2728                                         lyp->nfsly_flags &= ~NFSLY_WRITTEN;
2729                                         NFSUNLOCKCLSTATE();
2730                                         NFSCL_DEBUG(3, "do layoutcommit\n");
2731                                         nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
2732                                             cred, p);
2733                                         NFSLOCKCLSTATE();
2734                                         goto tryagain2;
2735                                 }
2736                         }
2737                 }
2738
2739                 /* Now, look for stale layouts. */
2740                 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
2741                 while (lyp != NULL) {
2742                         nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
2743                         if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
2744                             (lyp->nfsly_flags & NFSLY_RECALL) == 0 &&
2745                             lyp->nfsly_lock.nfslock_usecnt == 0 &&
2746                             lyp->nfsly_lock.nfslock_lock == 0) {
2747                                 NFSCL_DEBUG(4, "ret stale lay=%d\n",
2748                                     nfscl_layoutcnt);
2749                                 recallp = malloc(sizeof(*recallp),
2750                                     M_NFSLAYRECALL, M_NOWAIT);
2751                                 if (recallp == NULL)
2752                                         break;
2753                                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
2754                                     lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
2755                                     lyp->nfsly_stateid.seqid, recallp);
2756                         }
2757                         lyp = nlyp;
2758                 }
2759
2760                 /*
2761                  * Free up any unreferenced device info structures.
2762                  */
2763                 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
2764                         if (dip->nfsdi_layoutrefs == 0 &&
2765                             dip->nfsdi_refcnt == 0) {
2766                                 NFSCL_DEBUG(4, "freeing devinfo\n");
2767                                 LIST_REMOVE(dip, nfsdi_list);
2768                                 nfscl_freedevinfo(dip);
2769                         }
2770                 }
2771                 NFSUNLOCKCLSTATE();
2772
2773                 /* Do layout return(s), as required. */
2774                 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
2775                         TAILQ_REMOVE(&rlh, lyp, nfsly_list);
2776                         NFSCL_DEBUG(4, "ret layout\n");
2777                         nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
2778                         nfscl_freelayout(lyp);
2779                 }
2780
2781                 /*
2782                  * Delegreturn any delegations cleaned out or recalled.
2783                  */
2784                 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
2785                         newnfs_copycred(&dp->nfsdl_cred, cred);
2786                         (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2787                         TAILQ_REMOVE(&dh, dp, nfsdl_list);
2788                         FREE((caddr_t)dp, M_NFSCLDELEG);
2789                 }
2790
2791                 SLIST_INIT(&lfh);
2792                 /*
2793                  * Call nfscl_cleanupkext() once per second to check for
2794                  * open/lock owners where the process has exited.
2795                  */
2796                 mytime = NFSD_MONOSEC;
2797                 if (prevsec != mytime) {
2798                         prevsec = mytime;
2799                         nfscl_cleanupkext(clp, &lfh);
2800                 }
2801
2802                 /*
2803                  * Do a ReleaseLockOwner for all lock owners where the
2804                  * associated process no longer exists, as found by
2805                  * nfscl_cleanupkext().
2806                  */
2807                 newnfs_setroot(cred);
2808                 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
2809                         LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
2810                             nlp) {
2811                                 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
2812                                     lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
2813                                     p);
2814                                 nfscl_freelockowner(lp, 0);
2815                         }
2816                         free(lfhp, M_TEMP);
2817                 }
2818                 SLIST_INIT(&lfh);
2819
2820                 NFSLOCKCLSTATE();
2821                 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
2822                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
2823                             hz);
2824                 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
2825                         clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
2826                         NFSUNLOCKCLSTATE();
2827                         NFSFREECRED(cred);
2828                         wakeup((caddr_t)clp);
2829                         return;
2830                 }
2831                 NFSUNLOCKCLSTATE();
2832         }
2833 }
2834
2835 /*
2836  * Initiate state recovery. Called when NFSERR_STALECLIENTID,
2837  * NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
2838  */
2839 APPLESTATIC void
2840 nfscl_initiate_recovery(struct nfsclclient *clp)
2841 {
2842
2843         if (clp == NULL)
2844                 return;
2845         NFSLOCKCLSTATE();
2846         clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2847         NFSUNLOCKCLSTATE();
2848         wakeup((caddr_t)clp);
2849 }
2850
2851 /*
2852  * Dump out the state stuff for debugging.
2853  */
2854 APPLESTATIC void
2855 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
2856     int lockowner, int locks)
2857 {
2858         struct nfsclclient *clp;
2859         struct nfsclowner *owp;
2860         struct nfsclopen *op;
2861         struct nfscllockowner *lp;
2862         struct nfscllock *lop;
2863         struct nfscldeleg *dp;
2864
2865         clp = nmp->nm_clp;
2866         if (clp == NULL) {
2867                 printf("nfscl dumpstate NULL clp\n");
2868                 return;
2869         }
2870         NFSLOCKCLSTATE();
2871         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2872           LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2873             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2874                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2875                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2876                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2877                     owp->nfsow_seqid);
2878             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2879                 if (opens)
2880                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2881                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2882                         op->nfso_stateid.other[2], op->nfso_opencnt,
2883                         op->nfso_fh[12]);
2884                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2885                     if (lockowner)
2886                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2887                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2888                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2889                             lp->nfsl_seqid,
2890                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2891                             lp->nfsl_stateid.other[2]);
2892                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2893                         if (locks)
2894 #ifdef __FreeBSD__
2895                             printf("lck typ=%d fst=%ju end=%ju\n",
2896                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2897                                 (intmax_t)lop->nfslo_end);
2898 #else
2899                             printf("lck typ=%d fst=%qd end=%qd\n",
2900                                 lop->nfslo_type, lop->nfslo_first,
2901                                 lop->nfslo_end);
2902 #endif
2903                     }
2904                 }
2905             }
2906           }
2907         }
2908         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2909             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2910                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2911                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2912                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2913                     owp->nfsow_seqid);
2914             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2915                 if (opens)
2916                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2917                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2918                         op->nfso_stateid.other[2], op->nfso_opencnt,
2919                         op->nfso_fh[12]);
2920                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2921                     if (lockowner)
2922                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2923                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2924                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2925                             lp->nfsl_seqid,
2926                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2927                             lp->nfsl_stateid.other[2]);
2928                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2929                         if (locks)
2930 #ifdef __FreeBSD__
2931                             printf("lck typ=%d fst=%ju end=%ju\n",
2932                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2933                                 (intmax_t)lop->nfslo_end);
2934 #else
2935                             printf("lck typ=%d fst=%qd end=%qd\n",
2936                                 lop->nfslo_type, lop->nfslo_first,
2937                                 lop->nfslo_end);
2938 #endif
2939                     }
2940                 }
2941             }
2942         }
2943         NFSUNLOCKCLSTATE();
2944 }
2945
2946 /*
2947  * Check for duplicate open owners and opens.
2948  * (Only used as a diagnostic aid.)
2949  */
2950 APPLESTATIC void
2951 nfscl_dupopen(vnode_t vp, int dupopens)
2952 {
2953         struct nfsclclient *clp;
2954         struct nfsclowner *owp, *owp2;
2955         struct nfsclopen *op, *op2;
2956         struct nfsfh *nfhp;
2957
2958         clp = VFSTONFS(vnode_mount(vp))->nm_clp;
2959         if (clp == NULL) {
2960                 printf("nfscl dupopen NULL clp\n");
2961                 return;
2962         }
2963         nfhp = VTONFS(vp)->n_fhp;
2964         NFSLOCKCLSTATE();
2965
2966         /*
2967          * First, search for duplicate owners.
2968          * These should never happen!
2969          */
2970         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2971             LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2972                 if (owp != owp2 &&
2973                     !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
2974                     NFSV4CL_LOCKNAMELEN)) {
2975                         NFSUNLOCKCLSTATE();
2976                         printf("DUP OWNER\n");
2977                         nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
2978                         return;
2979                 }
2980             }
2981         }
2982
2983         /*
2984          * Now, search for duplicate stateids.
2985          * These shouldn't happen, either.
2986          */
2987         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2988             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2989                 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2990                     LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2991                         if (op != op2 &&
2992                             (op->nfso_stateid.other[0] != 0 ||
2993                              op->nfso_stateid.other[1] != 0 ||
2994                              op->nfso_stateid.other[2] != 0) &&
2995                             op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
2996                             op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
2997                             op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
2998                             NFSUNLOCKCLSTATE();
2999                             printf("DUP STATEID\n");
3000                             nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
3001                                 0);
3002                             return;
3003                         }
3004                     }
3005                 }
3006             }
3007         }
3008
3009         /*
3010          * Now search for duplicate opens.
3011          * Duplicate opens for the same owner
3012          * should never occur. Other duplicates are
3013          * possible and are checked for if "dupopens"
3014          * is true.
3015          */
3016         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3017             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3018                 if (nfhp->nfh_len == op2->nfso_fhlen &&
3019                     !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
3020                     LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3021                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3022                             if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
3023                                 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
3024                                 (!NFSBCMP(op->nfso_own->nfsow_owner,
3025                                  op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
3026                                  dupopens)) {
3027                                 if (!NFSBCMP(op->nfso_own->nfsow_owner,
3028                                     op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3029                                     NFSUNLOCKCLSTATE();
3030                                     printf("BADDUP OPEN\n");
3031                                 } else {
3032                                     NFSUNLOCKCLSTATE();
3033                                     printf("DUP OPEN\n");
3034                                 }
3035                                 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
3036                                     0, 0);
3037                                 return;
3038                             }
3039                         }
3040                     }
3041                 }
3042             }
3043         }
3044         NFSUNLOCKCLSTATE();
3045 }
3046
3047 /*
3048  * During close, find an open that needs to be dereferenced and
3049  * dereference it. If there are no more opens for this file,
3050  * log a message to that effect.
3051  * Opens aren't actually Close'd until VOP_INACTIVE() is performed
3052  * on the file's vnode.
3053  * This is the safe way, since it is difficult to identify
3054  * which open the close is for and I/O can be performed after the
3055  * close(2) system call when a file is mmap'd.
3056  * If it returns 0 for success, there will be a referenced
3057  * clp returned via clpp.
3058  */
3059 APPLESTATIC int
3060 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
3061 {
3062         struct nfsclclient *clp;
3063         struct nfsclowner *owp;
3064         struct nfsclopen *op;
3065         struct nfscldeleg *dp;
3066         struct nfsfh *nfhp;
3067         int error, notdecr;
3068
3069         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3070         if (error)
3071                 return (error);
3072         *clpp = clp;
3073
3074         nfhp = VTONFS(vp)->n_fhp;
3075         notdecr = 1;
3076         NFSLOCKCLSTATE();
3077         /*
3078          * First, look for one under a delegation that was locally issued
3079          * and just decrement the opencnt for it. Since all my Opens against
3080          * the server are DENY_NONE, I don't see a problem with hanging
3081          * onto them. (It is much easier to use one of the extant Opens
3082          * that I already have on the server when a Delegation is recalled
3083          * than to do fresh Opens.) Someday, I might need to rethink this, but.
3084          */
3085         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3086         if (dp != NULL) {
3087                 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3088                         op = LIST_FIRST(&owp->nfsow_open);
3089                         if (op != NULL) {
3090                                 /*
3091                                  * Since a delegation is for a file, there
3092                                  * should never be more than one open for
3093                                  * each openowner.
3094                                  */
3095                                 if (LIST_NEXT(op, nfso_list) != NULL)
3096                                         panic("nfscdeleg opens");
3097                                 if (notdecr && op->nfso_opencnt > 0) {
3098                                         notdecr = 0;
3099                                         op->nfso_opencnt--;
3100                                         break;
3101                                 }
3102                         }
3103                 }
3104         }
3105
3106         /* Now process the opens against the server. */
3107         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3108                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3109                         if (op->nfso_fhlen == nfhp->nfh_len &&
3110                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3111                             nfhp->nfh_len)) {
3112                                 /* Found an open, decrement cnt if possible */
3113                                 if (notdecr && op->nfso_opencnt > 0) {
3114                                         notdecr = 0;
3115                                         op->nfso_opencnt--;
3116                                 }
3117                                 /*
3118                                  * There are more opens, so just return.
3119                                  */
3120                                 if (op->nfso_opencnt > 0) {
3121                                         NFSUNLOCKCLSTATE();
3122                                         return (0);
3123                                 }
3124                         }
3125                 }
3126         }
3127         NFSUNLOCKCLSTATE();
3128         if (notdecr)
3129                 printf("nfscl: never fnd open\n");
3130         return (0);
3131 }
3132
3133 APPLESTATIC int
3134 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
3135 {
3136         struct nfsclclient *clp;
3137         struct nfsclowner *owp, *nowp;
3138         struct nfsclopen *op;
3139         struct nfscldeleg *dp;
3140         struct nfsfh *nfhp;
3141         struct nfsclrecalllayout *recallp;
3142         int error;
3143
3144         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3145         if (error)
3146                 return (error);
3147         *clpp = clp;
3148
3149         nfhp = VTONFS(vp)->n_fhp;
3150         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
3151         NFSLOCKCLSTATE();
3152         /*
3153          * First get rid of the local Open structures, which should be no
3154          * longer in use.
3155          */
3156         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3157         if (dp != NULL) {
3158                 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
3159                         op = LIST_FIRST(&owp->nfsow_open);
3160                         if (op != NULL) {
3161                                 KASSERT((op->nfso_opencnt == 0),
3162                                     ("nfscl: bad open cnt on deleg"));
3163                                 nfscl_freeopen(op, 1);
3164                         }
3165                         nfscl_freeopenowner(owp, 1);
3166                 }
3167         }
3168
3169         /* Return any layouts marked return on close. */
3170         nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp);
3171
3172         /* Now process the opens against the server. */
3173 lookformore:
3174         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3175                 op = LIST_FIRST(&owp->nfsow_open);
3176                 while (op != NULL) {
3177                         if (op->nfso_fhlen == nfhp->nfh_len &&
3178                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3179                             nfhp->nfh_len)) {
3180                                 /* Found an open, close it. */
3181                                 KASSERT((op->nfso_opencnt == 0),
3182                                     ("nfscl: bad open cnt on server"));
3183                                 NFSUNLOCKCLSTATE();
3184                                 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
3185                                     p);
3186                                 NFSLOCKCLSTATE();
3187                                 goto lookformore;
3188                         }
3189                         op = LIST_NEXT(op, nfso_list);
3190                 }
3191         }
3192         NFSUNLOCKCLSTATE();
3193         /*
3194          * recallp has been set NULL by nfscl_retoncloselayout() if it was
3195          * used by the function, but calling free() with a NULL pointer is ok.
3196          */
3197         free(recallp, M_NFSLAYRECALL);
3198         return (0);
3199 }
3200
3201 /*
3202  * Return all delegations on this client.
3203  * (Must be called with client sleep lock.)
3204  */
3205 static void
3206 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
3207 {
3208         struct nfscldeleg *dp, *ndp;
3209         struct ucred *cred;
3210
3211         cred = newnfs_getcred();
3212         TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3213                 nfscl_cleandeleg(dp);
3214                 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3215                 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3216         }
3217         NFSFREECRED(cred);
3218 }
3219
3220 /*
3221  * Do a callback RPC.
3222  */
3223 APPLESTATIC void
3224 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3225 {
3226         int clist, gotseq_ok, i, j, k, op, rcalls;
3227         u_int32_t *tl;
3228         struct nfsclclient *clp;
3229         struct nfscldeleg *dp = NULL;
3230         int numops, taglen = -1, error = 0, trunc;
3231         u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
3232         u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3233         vnode_t vp = NULL;
3234         struct nfsnode *np;
3235         struct vattr va;
3236         struct nfsfh *nfhp;
3237         mount_t mp;
3238         nfsattrbit_t attrbits, rattrbits;
3239         nfsv4stateid_t stateid;
3240         uint32_t seqid, slotid = 0, highslot, cachethis;
3241         uint8_t sessionid[NFSX_V4SESSIONID];
3242         struct mbuf *rep;
3243         struct nfscllayout *lyp;
3244         uint64_t filesid[2], len, off;
3245         int changed, gotone, laytype, recalltype;
3246         uint32_t iomode;
3247         struct nfsclrecalllayout *recallp = NULL;
3248         struct nfsclsession *tsep;
3249
3250         gotseq_ok = 0;
3251         nfsrvd_rephead(nd);
3252         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3253         taglen = fxdr_unsigned(int, *tl);
3254         if (taglen < 0) {
3255                 error = EBADRPC;
3256                 goto nfsmout;
3257         }
3258         if (taglen <= NFSV4_SMALLSTR)
3259                 tagstr = tag;
3260         else
3261                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3262         error = nfsrv_mtostr(nd, tagstr, taglen);
3263         if (error) {
3264                 if (taglen > NFSV4_SMALLSTR)
3265                         free(tagstr, M_TEMP);
3266                 taglen = -1;
3267                 goto nfsmout;
3268         }
3269         (void) nfsm_strtom(nd, tag, taglen);
3270         if (taglen > NFSV4_SMALLSTR) {
3271                 free(tagstr, M_TEMP);
3272         }
3273         NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3274         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3275         minorvers = fxdr_unsigned(u_int32_t, *tl++);
3276         if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION)
3277                 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3278         cbident = fxdr_unsigned(u_int32_t, *tl++);
3279         if (nd->nd_repstat)
3280                 numops = 0;
3281         else
3282                 numops = fxdr_unsigned(int, *tl);
3283         /*
3284          * Loop around doing the sub ops.
3285          */
3286         for (i = 0; i < numops; i++) {
3287                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3288                 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3289                 *repp++ = *tl;
3290                 op = fxdr_unsigned(int, *tl);
3291                 if (op < NFSV4OP_CBGETATTR ||
3292                    (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
3293                    (op > NFSV4OP_CBNOTIFYDEVID &&
3294                     minorvers == NFSV41_MINORVERSION)) {
3295                     nd->nd_repstat = NFSERR_OPILLEGAL;
3296                     *repp = nfscl_errmap(nd, minorvers);
3297                     retops++;
3298                     break;
3299                 }
3300                 nd->nd_procnum = op;
3301                 if (op < NFSV41_CBNOPS)
3302                         nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
3303                 switch (op) {
3304                 case NFSV4OP_CBGETATTR:
3305                         NFSCL_DEBUG(4, "cbgetattr\n");
3306                         mp = NULL;
3307                         vp = NULL;
3308                         error = nfsm_getfh(nd, &nfhp);
3309                         if (!error)
3310                                 error = nfsrv_getattrbits(nd, &attrbits,
3311                                     NULL, NULL);
3312                         if (error == 0 && i == 0 &&
3313                             minorvers != NFSV4_MINORVERSION)
3314                                 error = NFSERR_OPNOTINSESS;
3315                         if (!error) {
3316                                 mp = nfscl_getmnt(minorvers, sessionid, cbident,
3317                                     &clp);
3318                                 if (mp == NULL)
3319                                         error = NFSERR_SERVERFAULT;
3320                         }
3321                         if (!error) {
3322                                 error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3323                                     nfhp->nfh_len, p, &np);
3324                                 if (!error)
3325                                         vp = NFSTOV(np);
3326                         }
3327                         if (!error) {
3328                                 NFSZERO_ATTRBIT(&rattrbits);
3329                                 NFSLOCKCLSTATE();
3330                                 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3331                                     nfhp->nfh_len);
3332                                 if (dp != NULL) {
3333                                         if (NFSISSET_ATTRBIT(&attrbits,
3334                                             NFSATTRBIT_SIZE)) {
3335                                                 if (vp != NULL)
3336                                                         va.va_size = np->n_size;
3337                                                 else
3338                                                         va.va_size =
3339                                                             dp->nfsdl_size;
3340                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3341                                                     NFSATTRBIT_SIZE);
3342                                         }
3343                                         if (NFSISSET_ATTRBIT(&attrbits,
3344                                             NFSATTRBIT_CHANGE)) {
3345                                                 va.va_filerev =
3346                                                     dp->nfsdl_change;
3347                                                 if (vp == NULL ||
3348                                                     (np->n_flag & NDELEGMOD))
3349                                                         va.va_filerev++;
3350                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3351                                                     NFSATTRBIT_CHANGE);
3352                                         }
3353                                 } else
3354                                         error = NFSERR_SERVERFAULT;
3355                                 NFSUNLOCKCLSTATE();
3356                         }
3357                         if (vp != NULL)
3358                                 vrele(vp);
3359                         if (mp != NULL)
3360                                 vfs_unbusy(mp);
3361                         if (nfhp != NULL)
3362                                 FREE((caddr_t)nfhp, M_NFSFH);
3363                         if (!error)
3364                                 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3365                                     NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
3366                                     (uint64_t)0);
3367                         break;
3368                 case NFSV4OP_CBRECALL:
3369                         NFSCL_DEBUG(4, "cbrecall\n");
3370                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3371                             NFSX_UNSIGNED);
3372                         stateid.seqid = *tl++;
3373                         NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3374                             NFSX_STATEIDOTHER);
3375                         tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3376                         trunc = fxdr_unsigned(int, *tl);
3377                         error = nfsm_getfh(nd, &nfhp);
3378                         if (error == 0 && i == 0 &&
3379                             minorvers != NFSV4_MINORVERSION)
3380                                 error = NFSERR_OPNOTINSESS;
3381                         if (!error) {
3382                                 NFSLOCKCLSTATE();
3383                                 if (minorvers == NFSV4_MINORVERSION)
3384                                         clp = nfscl_getclnt(cbident);
3385                                 else
3386                                         clp = nfscl_getclntsess(sessionid);
3387                                 if (clp != NULL) {
3388                                         dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3389                                             nfhp->nfh_len);
3390                                         if (dp != NULL && (dp->nfsdl_flags &
3391                                             NFSCLDL_DELEGRET) == 0) {
3392                                                 dp->nfsdl_flags |=
3393                                                     NFSCLDL_RECALL;
3394                                                 wakeup((caddr_t)clp);
3395                                         }
3396                                 } else {
3397                                         error = NFSERR_SERVERFAULT;
3398                                 }
3399                                 NFSUNLOCKCLSTATE();
3400                         }
3401                         if (nfhp != NULL)
3402                                 FREE((caddr_t)nfhp, M_NFSFH);
3403                         break;
3404                 case NFSV4OP_CBLAYOUTRECALL:
3405                         NFSCL_DEBUG(4, "cblayrec\n");
3406                         nfhp = NULL;
3407                         NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
3408                         laytype = fxdr_unsigned(int, *tl++);
3409                         iomode = fxdr_unsigned(uint32_t, *tl++);
3410                         if (newnfs_true == *tl++)
3411                                 changed = 1;
3412                         else
3413                                 changed = 0;
3414                         recalltype = fxdr_unsigned(int, *tl);
3415                         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
3416                             M_WAITOK);
3417                         if (laytype != NFSLAYOUT_NFSV4_1_FILES)
3418                                 error = NFSERR_NOMATCHLAYOUT;
3419                         else if (recalltype == NFSLAYOUTRETURN_FILE) {
3420                                 error = nfsm_getfh(nd, &nfhp);
3421                                 NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
3422                                 if (error != 0)
3423                                         goto nfsmout;
3424                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
3425                                     NFSX_STATEID);
3426                                 off = fxdr_hyper(tl); tl += 2;
3427                                 len = fxdr_hyper(tl); tl += 2;
3428                                 stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
3429                                 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
3430                                 if (minorvers == NFSV4_MINORVERSION)
3431                                         error = NFSERR_NOTSUPP;
3432                                 else if (i == 0)
3433                                         error = NFSERR_OPNOTINSESS;
3434                                 if (error == 0) {
3435                                         NFSLOCKCLSTATE();
3436                                         clp = nfscl_getclntsess(sessionid);
3437                                         NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
3438                                         if (clp != NULL) {
3439                                                 lyp = nfscl_findlayout(clp,
3440                                                     nfhp->nfh_fh,
3441                                                     nfhp->nfh_len);
3442                                                 NFSCL_DEBUG(4, "cblyp=%p\n",
3443                                                     lyp);
3444                                                 if (lyp != NULL &&
3445                                                     (lyp->nfsly_flags &
3446                                                      NFSLY_FILES) != 0 &&
3447                                                     !NFSBCMP(stateid.other,
3448                                                     lyp->nfsly_stateid.other,
3449                                                     NFSX_STATEIDOTHER)) {
3450                                                         error =
3451                                                             nfscl_layoutrecall(
3452                                                             recalltype,
3453                                                             lyp, iomode, off,
3454                                                             len, stateid.seqid,
3455                                                             recallp);
3456                                                         recallp = NULL;
3457                                                         wakeup(clp);
3458                                                         NFSCL_DEBUG(4,
3459                                                             "aft layrcal=%d\n",
3460                                                             error);
3461                                                 } else
3462                                                         error =
3463                                                           NFSERR_NOMATCHLAYOUT;
3464                                         } else
3465                                                 error = NFSERR_NOMATCHLAYOUT;
3466                                         NFSUNLOCKCLSTATE();
3467                                 }
3468                                 free(nfhp, M_NFSFH);
3469                         } else if (recalltype == NFSLAYOUTRETURN_FSID) {
3470                                 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
3471                                 filesid[0] = fxdr_hyper(tl); tl += 2;
3472                                 filesid[1] = fxdr_hyper(tl); tl += 2;
3473                                 gotone = 0;
3474                                 NFSLOCKCLSTATE();
3475                                 clp = nfscl_getclntsess(sessionid);
3476                                 if (clp != NULL) {
3477                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3478                                             nfsly_list) {
3479                                                 if (lyp->nfsly_filesid[0] ==
3480                                                     filesid[0] &&
3481                                                     lyp->nfsly_filesid[1] ==
3482                                                     filesid[1]) {
3483                                                         error =
3484                                                             nfscl_layoutrecall(
3485                                                             recalltype,
3486                                                             lyp, iomode, 0,
3487                                                             UINT64_MAX,
3488                                                             lyp->nfsly_stateid.seqid,
3489                                                             recallp);
3490                                                         recallp = NULL;
3491                                                         gotone = 1;
3492                                                 }
3493                                         }
3494                                         if (gotone != 0)
3495                                                 wakeup(clp);
3496                                         else
3497                                                 error = NFSERR_NOMATCHLAYOUT;
3498                                 } else
3499                                         error = NFSERR_NOMATCHLAYOUT;
3500                                 NFSUNLOCKCLSTATE();
3501                         } else if (recalltype == NFSLAYOUTRETURN_ALL) {
3502                                 gotone = 0;
3503                                 NFSLOCKCLSTATE();
3504                                 clp = nfscl_getclntsess(sessionid);
3505                                 if (clp != NULL) {
3506                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3507                                             nfsly_list) {
3508                                                 error = nfscl_layoutrecall(
3509                                                     recalltype, lyp, iomode, 0,
3510                                                     UINT64_MAX,
3511                                                     lyp->nfsly_stateid.seqid,
3512                                                     recallp);
3513                                                 recallp = NULL;
3514                                                 gotone = 1;
3515                                         }
3516                                         if (gotone != 0)
3517                                                 wakeup(clp);
3518                                         else
3519                                                 error = NFSERR_NOMATCHLAYOUT;
3520                                 } else
3521                                         error = NFSERR_NOMATCHLAYOUT;
3522                                 NFSUNLOCKCLSTATE();
3523                         } else
3524                                 error = NFSERR_NOMATCHLAYOUT;
3525                         if (recallp != NULL) {
3526                                 free(recallp, M_NFSLAYRECALL);
3527                                 recallp = NULL;
3528                         }
3529                         break;
3530                 case NFSV4OP_CBSEQUENCE:
3531                         NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3532                             5 * NFSX_UNSIGNED);
3533                         bcopy(tl, sessionid, NFSX_V4SESSIONID);
3534                         tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3535                         seqid = fxdr_unsigned(uint32_t, *tl++);
3536                         slotid = fxdr_unsigned(uint32_t, *tl++);
3537                         highslot = fxdr_unsigned(uint32_t, *tl++);
3538                         cachethis = *tl++;
3539                         /* Throw away the referring call stuff. */
3540                         clist = fxdr_unsigned(int, *tl);
3541                         for (j = 0; j < clist; j++) {
3542                                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3543                                     NFSX_UNSIGNED);
3544                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3545                                 rcalls = fxdr_unsigned(int, *tl);
3546                                 for (k = 0; k < rcalls; k++) {
3547                                         NFSM_DISSECT(tl, uint32_t *,
3548                                             2 * NFSX_UNSIGNED);
3549                                 }
3550                         }
3551                         NFSLOCKCLSTATE();
3552                         if (i == 0) {
3553                                 clp = nfscl_getclntsess(sessionid);
3554                                 if (clp == NULL)
3555                                         error = NFSERR_SERVERFAULT;
3556                         } else
3557                                 error = NFSERR_SEQUENCEPOS;
3558                         if (error == 0) {
3559                                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3560                                 error = nfsv4_seqsession(seqid, slotid,
3561                                     highslot, tsep->nfsess_cbslots, &rep,
3562                                     tsep->nfsess_backslots);
3563                         }
3564                         NFSUNLOCKCLSTATE();
3565                         if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
3566                                 gotseq_ok = 1;
3567                                 if (rep != NULL) {
3568                                         /*
3569                                          * Handle a reply for a retried
3570                                          * callback.  The reply will be
3571                                          * re-inserted in the session cache
3572                                          * by the nfsv4_seqsess_cacherep() call
3573                                          * after out:
3574                                          */
3575                                         KASSERT(error == NFSERR_REPLYFROMCACHE,
3576                                             ("cbsequence: non-NULL rep"));
3577                                         NFSCL_DEBUG(4, "Got cbretry\n");
3578                                         m_freem(nd->nd_mreq);
3579                                         nd->nd_mreq = rep;
3580                                         rep = NULL;
3581                                         goto out;
3582                                 }
3583                                 NFSM_BUILD(tl, uint32_t *,
3584                                     NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
3585                                 bcopy(sessionid, tl, NFSX_V4SESSIONID);
3586                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3587                                 *tl++ = txdr_unsigned(seqid);
3588                                 *tl++ = txdr_unsigned(slotid);
3589                                 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
3590                                 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
3591                         }
3592                         break;
3593                 default:
3594                         if (i == 0 && minorvers == NFSV41_MINORVERSION)
3595                                 error = NFSERR_OPNOTINSESS;
3596                         else {
3597                                 NFSCL_DEBUG(1, "unsupp callback %d\n", op);
3598                                 error = NFSERR_NOTSUPP;
3599                         }
3600                         break;
3601                 }
3602                 if (error) {
3603                         if (error == EBADRPC || error == NFSERR_BADXDR) {
3604                                 nd->nd_repstat = NFSERR_BADXDR;
3605                         } else {
3606                                 nd->nd_repstat = error;
3607                         }
3608                         error = 0;
3609                 }
3610                 retops++;
3611                 if (nd->nd_repstat) {
3612                         *repp = nfscl_errmap(nd, minorvers);
3613                         break;
3614                 } else
3615                         *repp = 0;      /* NFS4_OK */
3616         }
3617 nfsmout:
3618         if (recallp != NULL)
3619                 free(recallp, M_NFSLAYRECALL);
3620         if (error) {
3621                 if (error == EBADRPC || error == NFSERR_BADXDR)
3622                         nd->nd_repstat = NFSERR_BADXDR;
3623                 else
3624                         printf("nfsv4 comperr1=%d\n", error);
3625         }
3626         if (taglen == -1) {
3627                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3628                 *tl++ = 0;
3629                 *tl = 0;
3630         } else {
3631                 *retopsp = txdr_unsigned(retops);
3632         }
3633         *nd->nd_errp = nfscl_errmap(nd, minorvers);
3634 out:
3635         if (gotseq_ok != 0) {
3636                 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
3637                 NFSLOCKCLSTATE();
3638                 clp = nfscl_getclntsess(sessionid);
3639                 if (clp != NULL) {
3640                         tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3641                         nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
3642                             NFSERR_OK, &rep);
3643                         NFSUNLOCKCLSTATE();
3644                 } else {
3645                         NFSUNLOCKCLSTATE();
3646                         m_freem(rep);
3647                 }
3648         }
3649 }
3650
3651 /*
3652  * Generate the next cbident value. Basically just increment a static value
3653  * and then check that it isn't already in the list, if it has wrapped around.
3654  */
3655 static u_int32_t
3656 nfscl_nextcbident(void)
3657 {
3658         struct nfsclclient *clp;
3659         int matched;
3660         static u_int32_t nextcbident = 0;
3661         static int haswrapped = 0;
3662
3663         nextcbident++;
3664         if (nextcbident == 0)
3665                 haswrapped = 1;
3666         if (haswrapped) {
3667                 /*
3668                  * Search the clientid list for one already using this cbident.
3669                  */
3670                 do {
3671                         matched = 0;
3672                         NFSLOCKCLSTATE();
3673                         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3674                                 if (clp->nfsc_cbident == nextcbident) {
3675                                         matched = 1;
3676                                         break;
3677                                 }
3678                         }
3679                         NFSUNLOCKCLSTATE();
3680                         if (matched == 1)
3681                                 nextcbident++;
3682                 } while (matched);
3683         }
3684         return (nextcbident);
3685 }
3686
3687 /*
3688  * Get the mount point related to a given cbident or session and busy it.
3689  */
3690 static mount_t
3691 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
3692     struct nfsclclient **clpp)
3693 {
3694         struct nfsclclient *clp;
3695         mount_t mp;
3696         int error;
3697         struct nfsclsession *tsep;
3698
3699         *clpp = NULL;
3700         NFSLOCKCLSTATE();
3701         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3702                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3703                 if (minorvers == NFSV4_MINORVERSION) {
3704                         if (clp->nfsc_cbident == cbident)
3705                                 break;
3706                 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3707                     NFSX_V4SESSIONID))
3708                         break;
3709         }
3710         if (clp == NULL) {
3711                 NFSUNLOCKCLSTATE();
3712                 return (NULL);
3713         }
3714         mp = clp->nfsc_nmp->nm_mountp;
3715         vfs_ref(mp);
3716         NFSUNLOCKCLSTATE();
3717         error = vfs_busy(mp, 0);
3718         vfs_rel(mp);
3719         if (error != 0)
3720                 return (NULL);
3721         *clpp = clp;
3722         return (mp);
3723 }
3724
3725 /*
3726  * Get the clientid pointer related to a given cbident.
3727  */
3728 static struct nfsclclient *
3729 nfscl_getclnt(u_int32_t cbident)
3730 {
3731         struct nfsclclient *clp;
3732
3733         LIST_FOREACH(clp, &nfsclhead, nfsc_list)
3734                 if (clp->nfsc_cbident == cbident)
3735                         break;
3736         return (clp);
3737 }
3738
3739 /*
3740  * Get the clientid pointer related to a given sessionid.
3741  */
3742 static struct nfsclclient *
3743 nfscl_getclntsess(uint8_t *sessionid)
3744 {
3745         struct nfsclclient *clp;
3746         struct nfsclsession *tsep;
3747
3748         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3749                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3750                 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3751                     NFSX_V4SESSIONID))
3752                         break;
3753         }
3754         return (clp);
3755 }
3756
3757 /*
3758  * Search for a lock conflict locally on the client. A conflict occurs if
3759  * - not same owner and overlapping byte range and at least one of them is
3760  *   a write lock or this is an unlock.
3761  */
3762 static int
3763 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
3764     struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
3765     struct nfscllock **lopp)
3766 {
3767         struct nfsclowner *owp;
3768         struct nfsclopen *op;
3769         int ret;
3770
3771         if (dp != NULL) {
3772                 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
3773                 if (ret)
3774                         return (ret);
3775         }
3776         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3777                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3778                         if (op->nfso_fhlen == fhlen &&
3779                             !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
3780                                 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
3781                                     own, lopp);
3782                                 if (ret)
3783                                         return (ret);
3784                         }
3785                 }
3786         }
3787         return (0);
3788 }
3789
3790 static int
3791 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
3792     u_int8_t *own, struct nfscllock **lopp)
3793 {
3794         struct nfscllockowner *lp;
3795         struct nfscllock *lop;
3796
3797         LIST_FOREACH(lp, lhp, nfsl_list) {
3798                 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
3799                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3800                                 if (lop->nfslo_first >= nlop->nfslo_end)
3801                                         break;
3802                                 if (lop->nfslo_end <= nlop->nfslo_first)
3803                                         continue;
3804                                 if (lop->nfslo_type == F_WRLCK ||
3805                                     nlop->nfslo_type == F_WRLCK ||
3806                                     nlop->nfslo_type == F_UNLCK) {
3807                                         if (lopp != NULL)
3808                                                 *lopp = lop;
3809                                         return (NFSERR_DENIED);
3810                                 }
3811                         }
3812                 }
3813         }
3814         return (0);
3815 }
3816
3817 /*
3818  * Check for a local conflicting lock.
3819  */
3820 APPLESTATIC int
3821 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
3822     u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
3823 {
3824         struct nfscllock *lop, nlck;
3825         struct nfscldeleg *dp;
3826         struct nfsnode *np;
3827         u_int8_t own[NFSV4CL_LOCKNAMELEN];
3828         int error;
3829
3830         nlck.nfslo_type = fl->l_type;
3831         nlck.nfslo_first = off;
3832         if (len == NFS64BITSSET) {
3833                 nlck.nfslo_end = NFS64BITSSET;
3834         } else {
3835                 nlck.nfslo_end = off + len;
3836                 if (nlck.nfslo_end <= nlck.nfslo_first)
3837                         return (NFSERR_INVAL);
3838         }
3839         np = VTONFS(vp);
3840         nfscl_filllockowner(id, own, flags);
3841         NFSLOCKCLSTATE();
3842         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3843         error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
3844             &nlck, own, dp, &lop);
3845         if (error != 0) {
3846                 fl->l_whence = SEEK_SET;
3847                 fl->l_start = lop->nfslo_first;
3848                 if (lop->nfslo_end == NFS64BITSSET)
3849                         fl->l_len = 0;
3850                 else
3851                         fl->l_len = lop->nfslo_end - lop->nfslo_first;
3852                 fl->l_pid = (pid_t)0;
3853                 fl->l_type = lop->nfslo_type;
3854                 error = -1;                     /* no RPC required */
3855         } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
3856             fl->l_type == F_RDLCK)) {
3857                 /*
3858                  * The delegation ensures that there isn't a conflicting
3859                  * lock on the server, so return -1 to indicate an RPC
3860                  * isn't required.
3861                  */
3862                 fl->l_type = F_UNLCK;
3863                 error = -1;
3864         }
3865         NFSUNLOCKCLSTATE();
3866         return (error);
3867 }
3868
3869 /*
3870  * Handle Recall of a delegation.
3871  * The clp must be exclusive locked when this is called.
3872  */
3873 static int
3874 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
3875     struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
3876     int called_from_renewthread)
3877 {
3878         struct nfsclowner *owp, *lowp, *nowp;
3879         struct nfsclopen *op, *lop;
3880         struct nfscllockowner *lp;
3881         struct nfscllock *lckp;
3882         struct nfsnode *np;
3883         int error = 0, ret, gotvp = 0;
3884
3885         if (vp == NULL) {
3886                 /*
3887                  * First, get a vnode for the file. This is needed to do RPCs.
3888                  */
3889                 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
3890                     dp->nfsdl_fhlen, p, &np);
3891                 if (ret) {
3892                         /*
3893                          * File isn't open, so nothing to move over to the
3894                          * server.
3895                          */
3896                         return (0);
3897                 }
3898                 vp = NFSTOV(np);
3899                 gotvp = 1;
3900         } else {
3901                 np = VTONFS(vp);
3902         }
3903         dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
3904
3905         /*
3906          * Ok, if it's a write delegation, flush data to the server, so
3907          * that close/open consistency is retained.
3908          */
3909         ret = 0;
3910         NFSLOCKNODE(np);
3911         if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
3912                 np->n_flag |= NDELEGRECALL;
3913                 NFSUNLOCKNODE(np);
3914                 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
3915                 NFSLOCKNODE(np);
3916                 np->n_flag &= ~NDELEGRECALL;
3917         }
3918         NFSINVALATTRCACHE(np);
3919         NFSUNLOCKNODE(np);
3920         if (ret == EIO && called_from_renewthread != 0) {
3921                 /*
3922                  * If the flush failed with EIO for the renew thread,
3923                  * return now, so that the dirty buffer will be flushed
3924                  * later.
3925                  */
3926                 if (gotvp != 0)
3927                         vrele(vp);
3928                 return (ret);
3929         }
3930
3931         /*
3932          * Now, for each openowner with opens issued locally, move them
3933          * over to state against the server.
3934          */
3935         LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
3936                 lop = LIST_FIRST(&lowp->nfsow_open);
3937                 if (lop != NULL) {
3938                         if (LIST_NEXT(lop, nfso_list) != NULL)
3939                                 panic("nfsdlg mult opens");
3940                         /*
3941                          * Look for the same openowner against the server.
3942                          */
3943                         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3944                                 if (!NFSBCMP(lowp->nfsow_owner,
3945                                     owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3946                                         newnfs_copycred(&dp->nfsdl_cred, cred);
3947                                         ret = nfscl_moveopen(vp, clp, nmp, lop,
3948                                             owp, dp, cred, p);
3949                                         if (ret == NFSERR_STALECLIENTID ||
3950                                             ret == NFSERR_STALEDONTRECOVER ||
3951                                             ret == NFSERR_BADSESSION) {
3952                                                 if (gotvp)
3953                                                         vrele(vp);
3954                                                 return (ret);
3955                                         }
3956                                         if (ret) {
3957                                                 nfscl_freeopen(lop, 1);
3958                                                 if (!error)
3959                                                         error = ret;
3960                                         }
3961                                         break;
3962                                 }
3963                         }
3964
3965                         /*
3966                          * If no openowner found, create one and get an open
3967                          * for it.
3968                          */
3969                         if (owp == NULL) {
3970                                 MALLOC(nowp, struct nfsclowner *,
3971                                     sizeof (struct nfsclowner), M_NFSCLOWNER,
3972                                     M_WAITOK);
3973                                 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
3974                                     NULL, lowp->nfsow_owner, dp->nfsdl_fh,
3975                                     dp->nfsdl_fhlen, NULL, NULL);
3976                                 newnfs_copycred(&dp->nfsdl_cred, cred);
3977                                 ret = nfscl_moveopen(vp, clp, nmp, lop,
3978                                     owp, dp, cred, p);
3979                                 if (ret) {
3980                                         nfscl_freeopenowner(owp, 0);
3981                                         if (ret == NFSERR_STALECLIENTID ||
3982                                             ret == NFSERR_STALEDONTRECOVER ||
3983                                             ret == NFSERR_BADSESSION) {
3984                                                 if (gotvp)
3985                                                         vrele(vp);
3986                                                 return (ret);
3987                                         }
3988                                         if (ret) {
3989                                                 nfscl_freeopen(lop, 1);
3990                                                 if (!error)
3991                                                         error = ret;
3992                                         }
3993                                 }
3994                         }
3995                 }
3996         }
3997
3998         /*
3999          * Now, get byte range locks for any locks done locally.
4000          */
4001         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4002                 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
4003                         newnfs_copycred(&dp->nfsdl_cred, cred);
4004                         ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
4005                         if (ret == NFSERR_STALESTATEID ||
4006                             ret == NFSERR_STALEDONTRECOVER ||
4007                             ret == NFSERR_STALECLIENTID ||
4008                             ret == NFSERR_BADSESSION) {
4009                                 if (gotvp)
4010                                         vrele(vp);
4011                                 return (ret);
4012                         }
4013                         if (ret && !error)
4014                                 error = ret;
4015                 }
4016         }
4017         if (gotvp)
4018                 vrele(vp);
4019         return (error);
4020 }
4021
4022 /*
4023  * Move a locally issued open over to an owner on the state list.
4024  * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
4025  * returns with it unlocked.
4026  */
4027 static int
4028 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4029     struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
4030     struct ucred *cred, NFSPROC_T *p)
4031 {
4032         struct nfsclopen *op, *nop;
4033         struct nfscldeleg *ndp;
4034         struct nfsnode *np;
4035         int error = 0, newone;
4036
4037         /*
4038          * First, look for an appropriate open, If found, just increment the
4039          * opencnt in it.
4040          */
4041         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
4042                 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
4043                     op->nfso_fhlen == lop->nfso_fhlen &&
4044                     !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
4045                         op->nfso_opencnt += lop->nfso_opencnt;
4046                         nfscl_freeopen(lop, 1);
4047                         return (0);
4048                 }
4049         }
4050
4051         /* No appropriate open, so we have to do one against the server. */
4052         np = VTONFS(vp);
4053         MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
4054             lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
4055         newone = 0;
4056         nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
4057             lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
4058         ndp = dp;
4059         error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
4060             lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
4061             NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
4062         if (error) {
4063                 if (newone)
4064                         nfscl_freeopen(op, 0);
4065         } else {
4066                 op->nfso_mode |= lop->nfso_mode;
4067                 op->nfso_opencnt += lop->nfso_opencnt;
4068                 nfscl_freeopen(lop, 1);
4069         }
4070         if (nop != NULL)
4071                 FREE((caddr_t)nop, M_NFSCLOPEN);
4072         if (ndp != NULL) {
4073                 /*
4074                  * What should I do with the returned delegation, since the
4075                  * delegation is being recalled? For now, just printf and
4076                  * through it away.
4077                  */
4078                 printf("Moveopen returned deleg\n");
4079                 FREE((caddr_t)ndp, M_NFSCLDELEG);
4080         }
4081         return (error);
4082 }
4083
4084 /*
4085  * Recall all delegations on this client.
4086  */
4087 static void
4088 nfscl_totalrecall(struct nfsclclient *clp)
4089 {
4090         struct nfscldeleg *dp;
4091
4092         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
4093                 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
4094                         dp->nfsdl_flags |= NFSCLDL_RECALL;
4095         }
4096 }
4097
4098 /*
4099  * Relock byte ranges. Called for delegation recall and state expiry.
4100  */
4101 static int
4102 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4103     struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
4104     NFSPROC_T *p)
4105 {
4106         struct nfscllockowner *nlp;
4107         struct nfsfh *nfhp;
4108         u_int64_t off, len;
4109         u_int32_t clidrev = 0;
4110         int error, newone, donelocally;
4111
4112         off = lop->nfslo_first;
4113         len = lop->nfslo_end - lop->nfslo_first;
4114         error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
4115             clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
4116             lp->nfsl_openowner, &nlp, &newone, &donelocally);
4117         if (error || donelocally)
4118                 return (error);
4119         if (nmp->nm_clp != NULL)
4120                 clidrev = nmp->nm_clp->nfsc_clientidrev;
4121         else
4122                 clidrev = 0;
4123         nfhp = VTONFS(vp)->n_fhp;
4124         error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
4125             nfhp->nfh_len, nlp, newone, 0, off,
4126             len, lop->nfslo_type, cred, p);
4127         if (error)
4128                 nfscl_freelockowner(nlp, 0);
4129         return (error);
4130 }
4131
4132 /*
4133  * Called to re-open a file. Basically get a vnode for the file handle
4134  * and then call nfsrpc_openrpc() to do the rest.
4135  */
4136 static int
4137 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
4138     u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
4139     struct ucred *cred, NFSPROC_T *p)
4140 {
4141         struct nfsnode *np;
4142         vnode_t vp;
4143         int error;
4144
4145         error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
4146         if (error)
4147                 return (error);
4148         vp = NFSTOV(np);
4149         if (np->n_v4 != NULL) {
4150                 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4151                     np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
4152                     NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
4153                     cred, p);
4154         } else {
4155                 error = EINVAL;
4156         }
4157         vrele(vp);
4158         return (error);
4159 }
4160
4161 /*
4162  * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
4163  * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
4164  * fail.
4165  */
4166 static int
4167 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4168     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
4169     u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
4170     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
4171 {
4172         int error;
4173
4174         do {
4175                 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
4176                     mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
4177                     0, 0);
4178                 if (error == NFSERR_DELAY)
4179                         (void) nfs_catnap(PZERO, error, "nfstryop");
4180         } while (error == NFSERR_DELAY);
4181         if (error == EAUTH || error == EACCES) {
4182                 /* Try again using system credentials */
4183                 newnfs_setroot(cred);
4184                 do {
4185                     error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
4186                         newfhlen, mode, op, name, namelen, ndpp, reclaim,
4187                         delegtype, cred, p, 1, 0);
4188                     if (error == NFSERR_DELAY)
4189                         (void) nfs_catnap(PZERO, error, "nfstryop");
4190                 } while (error == NFSERR_DELAY);
4191         }
4192         return (error);
4193 }
4194
4195 /*
4196  * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
4197  * NFSERR_DELAY. Also, retry with system credentials, if the provided
4198  * cred don't work.
4199  */
4200 static int
4201 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
4202     int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
4203     u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
4204 {
4205         struct nfsrv_descript nfsd, *nd = &nfsd;
4206         int error;
4207
4208         do {
4209                 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
4210                     reclaim, off, len, type, cred, p, 0);
4211                 if (!error && nd->nd_repstat == NFSERR_DELAY)
4212                         (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4213                             "nfstrylck");
4214         } while (!error && nd->nd_repstat == NFSERR_DELAY);
4215         if (!error)
4216                 error = nd->nd_repstat;
4217         if (error == EAUTH || error == EACCES) {
4218                 /* Try again using root credentials */
4219                 newnfs_setroot(cred);
4220                 do {
4221                         error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
4222                             newone, reclaim, off, len, type, cred, p, 1);
4223                         if (!error && nd->nd_repstat == NFSERR_DELAY)
4224                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4225                                     "nfstrylck");
4226                 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4227                 if (!error)
4228                         error = nd->nd_repstat;
4229         }
4230         return (error);
4231 }
4232
4233 /*
4234  * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
4235  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4236  * credentials fail.
4237  */
4238 static int
4239 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
4240     struct nfsmount *nmp, NFSPROC_T *p)
4241 {
4242         int error;
4243
4244         do {
4245                 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
4246                 if (error == NFSERR_DELAY)
4247                         (void) nfs_catnap(PZERO, error, "nfstrydp");
4248         } while (error == NFSERR_DELAY);
4249         if (error == EAUTH || error == EACCES) {
4250                 /* Try again using system credentials */
4251                 newnfs_setroot(cred);
4252                 do {
4253                         error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
4254                         if (error == NFSERR_DELAY)
4255                                 (void) nfs_catnap(PZERO, error, "nfstrydp");
4256                 } while (error == NFSERR_DELAY);
4257         }
4258         return (error);
4259 }
4260
4261 /*
4262  * Try a close against the server. Just call nfsrpc_closerpc(),
4263  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4264  * credentials fail.
4265  */
4266 APPLESTATIC int
4267 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
4268     struct nfsmount *nmp, NFSPROC_T *p)
4269 {
4270         struct nfsrv_descript nfsd, *nd = &nfsd;
4271         int error;
4272
4273         do {
4274                 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
4275                 if (error == NFSERR_DELAY)
4276                         (void) nfs_catnap(PZERO, error, "nfstrycl");
4277         } while (error == NFSERR_DELAY);
4278         if (error == EAUTH || error == EACCES) {
4279                 /* Try again using system credentials */
4280                 newnfs_setroot(cred);
4281                 do {
4282                         error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
4283                         if (error == NFSERR_DELAY)
4284                                 (void) nfs_catnap(PZERO, error, "nfstrycl");
4285                 } while (error == NFSERR_DELAY);
4286         }
4287         return (error);
4288 }
4289
4290 /*
4291  * Decide if a delegation on a file permits close without flushing writes
4292  * to the server. This might be a big performance win in some environments.
4293  * (Not useful until the client does caching on local stable storage.)
4294  */
4295 APPLESTATIC int
4296 nfscl_mustflush(vnode_t vp)
4297 {
4298         struct nfsclclient *clp;
4299         struct nfscldeleg *dp;
4300         struct nfsnode *np;
4301         struct nfsmount *nmp;
4302
4303         np = VTONFS(vp);
4304         nmp = VFSTONFS(vnode_mount(vp));
4305         if (!NFSHASNFSV4(nmp))
4306                 return (1);
4307         NFSLOCKCLSTATE();
4308         clp = nfscl_findcl(nmp);
4309         if (clp == NULL) {
4310                 NFSUNLOCKCLSTATE();
4311                 return (1);
4312         }
4313         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4314         if (dp != NULL && (dp->nfsdl_flags &
4315             (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
4316              NFSCLDL_WRITE &&
4317             (dp->nfsdl_sizelimit >= np->n_size ||
4318              !NFSHASSTRICT3530(nmp))) {
4319                 NFSUNLOCKCLSTATE();
4320                 return (0);
4321         }
4322         NFSUNLOCKCLSTATE();
4323         return (1);
4324 }
4325
4326 /*
4327  * See if a (write) delegation exists for this file.
4328  */
4329 APPLESTATIC int
4330 nfscl_nodeleg(vnode_t vp, int writedeleg)
4331 {
4332         struct nfsclclient *clp;
4333         struct nfscldeleg *dp;
4334         struct nfsnode *np;
4335         struct nfsmount *nmp;
4336
4337         np = VTONFS(vp);
4338         nmp = VFSTONFS(vnode_mount(vp));
4339         if (!NFSHASNFSV4(nmp))
4340                 return (1);
4341         NFSLOCKCLSTATE();
4342         clp = nfscl_findcl(nmp);
4343         if (clp == NULL) {
4344                 NFSUNLOCKCLSTATE();
4345                 return (1);
4346         }
4347         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4348         if (dp != NULL &&
4349             (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
4350             (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
4351              NFSCLDL_WRITE)) {
4352                 NFSUNLOCKCLSTATE();
4353                 return (0);
4354         }
4355         NFSUNLOCKCLSTATE();
4356         return (1);
4357 }
4358
4359 /*
4360  * Look for an associated delegation that should be DelegReturned.
4361  */
4362 APPLESTATIC int
4363 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
4364 {
4365         struct nfsclclient *clp;
4366         struct nfscldeleg *dp;
4367         struct nfsclowner *owp;
4368         struct nfscllockowner *lp;
4369         struct nfsmount *nmp;
4370         struct ucred *cred;
4371         struct nfsnode *np;
4372         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4373
4374         nmp = VFSTONFS(vnode_mount(vp));
4375         np = VTONFS(vp);
4376         NFSLOCKCLSTATE();
4377         /*
4378          * Loop around waiting for:
4379          * - outstanding I/O operations on delegations to complete
4380          * - for a delegation on vp that has state, lock the client and
4381          *   do a recall
4382          * - return delegation with no state
4383          */
4384         while (1) {
4385                 clp = nfscl_findcl(nmp);
4386                 if (clp == NULL) {
4387                         NFSUNLOCKCLSTATE();
4388                         return (retcnt);
4389                 }
4390                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4391                     np->n_fhp->nfh_len);
4392                 if (dp != NULL) {
4393                     /*
4394                      * Wait for outstanding I/O ops to be done.
4395                      */
4396                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4397                         if (igotlock) {
4398                             nfsv4_unlock(&clp->nfsc_lock, 0);
4399                             igotlock = 0;
4400                         }
4401                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4402                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4403                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4404                         continue;
4405                     }
4406                     needsrecall = 0;
4407                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4408                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4409                             needsrecall = 1;
4410                             break;
4411                         }
4412                     }
4413                     if (!needsrecall) {
4414                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4415                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4416                                 needsrecall = 1;
4417                                 break;
4418                             }
4419                         }
4420                     }
4421                     if (needsrecall && !triedrecall) {
4422                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4423                         islept = 0;
4424                         while (!igotlock) {
4425                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4426                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4427                             if (islept)
4428                                 break;
4429                         }
4430                         if (islept)
4431                             continue;
4432                         NFSUNLOCKCLSTATE();
4433                         cred = newnfs_getcred();
4434                         newnfs_copycred(&dp->nfsdl_cred, cred);
4435                         (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
4436                         NFSFREECRED(cred);
4437                         triedrecall = 1;
4438                         NFSLOCKCLSTATE();
4439                         nfsv4_unlock(&clp->nfsc_lock, 0);
4440                         igotlock = 0;
4441                         continue;
4442                     }
4443                     *stp = dp->nfsdl_stateid;
4444                     retcnt = 1;
4445                     nfscl_cleandeleg(dp);
4446                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4447                 }
4448                 if (igotlock)
4449                     nfsv4_unlock(&clp->nfsc_lock, 0);
4450                 NFSUNLOCKCLSTATE();
4451                 return (retcnt);
4452         }
4453 }
4454
4455 /*
4456  * Look for associated delegation(s) that should be DelegReturned.
4457  */
4458 APPLESTATIC int
4459 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
4460     nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
4461 {
4462         struct nfsclclient *clp;
4463         struct nfscldeleg *dp;
4464         struct nfsclowner *owp;
4465         struct nfscllockowner *lp;
4466         struct nfsmount *nmp;
4467         struct ucred *cred;
4468         struct nfsnode *np;
4469         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4470
4471         nmp = VFSTONFS(vnode_mount(fvp));
4472         *gotfdp = 0;
4473         *gottdp = 0;
4474         NFSLOCKCLSTATE();
4475         /*
4476          * Loop around waiting for:
4477          * - outstanding I/O operations on delegations to complete
4478          * - for a delegation on fvp that has state, lock the client and
4479          *   do a recall
4480          * - return delegation(s) with no state.
4481          */
4482         while (1) {
4483                 clp = nfscl_findcl(nmp);
4484                 if (clp == NULL) {
4485                         NFSUNLOCKCLSTATE();
4486                         return (retcnt);
4487                 }
4488                 np = VTONFS(fvp);
4489                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4490                     np->n_fhp->nfh_len);
4491                 if (dp != NULL && *gotfdp == 0) {
4492                     /*
4493                      * Wait for outstanding I/O ops to be done.
4494                      */
4495                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4496                         if (igotlock) {
4497                             nfsv4_unlock(&clp->nfsc_lock, 0);
4498                             igotlock = 0;
4499                         }
4500                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4501                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4502                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4503                         continue;
4504                     }
4505                     needsrecall = 0;
4506                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4507                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4508                             needsrecall = 1;
4509                             break;
4510                         }
4511                     }
4512                     if (!needsrecall) {
4513                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4514                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4515                                 needsrecall = 1;
4516                                 break;
4517                             }
4518                         }
4519                     }
4520                     if (needsrecall && !triedrecall) {
4521                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4522                         islept = 0;
4523                         while (!igotlock) {
4524                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4525                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4526                             if (islept)
4527                                 break;
4528                         }
4529                         if (islept)
4530                             continue;
4531                         NFSUNLOCKCLSTATE();
4532                         cred = newnfs_getcred();
4533                         newnfs_copycred(&dp->nfsdl_cred, cred);
4534                         (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
4535                         NFSFREECRED(cred);
4536                         triedrecall = 1;
4537                         NFSLOCKCLSTATE();
4538                         nfsv4_unlock(&clp->nfsc_lock, 0);
4539                         igotlock = 0;
4540                         continue;
4541                     }
4542                     *fstp = dp->nfsdl_stateid;
4543                     retcnt++;
4544                     *gotfdp = 1;
4545                     nfscl_cleandeleg(dp);
4546                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4547                 }
4548                 if (igotlock) {
4549                     nfsv4_unlock(&clp->nfsc_lock, 0);
4550                     igotlock = 0;
4551                 }
4552                 if (tvp != NULL) {
4553                     np = VTONFS(tvp);
4554                     dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4555                         np->n_fhp->nfh_len);
4556                     if (dp != NULL && *gottdp == 0) {
4557                         /*
4558                          * Wait for outstanding I/O ops to be done.
4559                          */
4560                         if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4561                             dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4562                             (void) nfsmsleep(&dp->nfsdl_rwlock,
4563                                 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4564                             continue;
4565                         }
4566                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4567                             if (!LIST_EMPTY(&owp->nfsow_open)) {
4568                                 NFSUNLOCKCLSTATE();
4569                                 return (retcnt);
4570                             }
4571                         }
4572                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4573                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4574                                 NFSUNLOCKCLSTATE();
4575                                 return (retcnt);
4576                             }
4577                         }
4578                         *tstp = dp->nfsdl_stateid;
4579                         retcnt++;
4580                         *gottdp = 1;
4581                         nfscl_cleandeleg(dp);
4582                         nfscl_freedeleg(&clp->nfsc_deleg, dp);
4583                     }
4584                 }
4585                 NFSUNLOCKCLSTATE();
4586                 return (retcnt);
4587         }
4588 }
4589
4590 /*
4591  * Get a reference on the clientid associated with the mount point.
4592  * Return 1 if success, 0 otherwise.
4593  */
4594 APPLESTATIC int
4595 nfscl_getref(struct nfsmount *nmp)
4596 {
4597         struct nfsclclient *clp;
4598
4599         NFSLOCKCLSTATE();
4600         clp = nfscl_findcl(nmp);
4601         if (clp == NULL) {
4602                 NFSUNLOCKCLSTATE();
4603                 return (0);
4604         }
4605         nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
4606         NFSUNLOCKCLSTATE();
4607         return (1);
4608 }
4609
4610 /*
4611  * Release a reference on a clientid acquired with the above call.
4612  */
4613 APPLESTATIC void
4614 nfscl_relref(struct nfsmount *nmp)
4615 {
4616         struct nfsclclient *clp;
4617
4618         NFSLOCKCLSTATE();
4619         clp = nfscl_findcl(nmp);
4620         if (clp == NULL) {
4621                 NFSUNLOCKCLSTATE();
4622                 return;
4623         }
4624         nfsv4_relref(&clp->nfsc_lock);
4625         NFSUNLOCKCLSTATE();
4626 }
4627
4628 /*
4629  * Save the size attribute in the delegation, since the nfsnode
4630  * is going away.
4631  */
4632 APPLESTATIC void
4633 nfscl_reclaimnode(vnode_t vp)
4634 {
4635         struct nfsclclient *clp;
4636         struct nfscldeleg *dp;
4637         struct nfsnode *np = VTONFS(vp);
4638         struct nfsmount *nmp;
4639
4640         nmp = VFSTONFS(vnode_mount(vp));
4641         if (!NFSHASNFSV4(nmp))
4642                 return;
4643         NFSLOCKCLSTATE();
4644         clp = nfscl_findcl(nmp);
4645         if (clp == NULL) {
4646                 NFSUNLOCKCLSTATE();
4647                 return;
4648         }
4649         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4650         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4651                 dp->nfsdl_size = np->n_size;
4652         NFSUNLOCKCLSTATE();
4653 }
4654
4655 /*
4656  * Get the saved size attribute in the delegation, since it is a
4657  * newly allocated nfsnode.
4658  */
4659 APPLESTATIC void
4660 nfscl_newnode(vnode_t vp)
4661 {
4662         struct nfsclclient *clp;
4663         struct nfscldeleg *dp;
4664         struct nfsnode *np = VTONFS(vp);
4665         struct nfsmount *nmp;
4666
4667         nmp = VFSTONFS(vnode_mount(vp));
4668         if (!NFSHASNFSV4(nmp))
4669                 return;
4670         NFSLOCKCLSTATE();
4671         clp = nfscl_findcl(nmp);
4672         if (clp == NULL) {
4673                 NFSUNLOCKCLSTATE();
4674                 return;
4675         }
4676         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4677         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4678                 np->n_size = dp->nfsdl_size;
4679         NFSUNLOCKCLSTATE();
4680 }
4681
4682 /*
4683  * If there is a valid write delegation for this file, set the modtime
4684  * to the local clock time.
4685  */
4686 APPLESTATIC void
4687 nfscl_delegmodtime(vnode_t vp)
4688 {
4689         struct nfsclclient *clp;
4690         struct nfscldeleg *dp;
4691         struct nfsnode *np = VTONFS(vp);
4692         struct nfsmount *nmp;
4693
4694         nmp = VFSTONFS(vnode_mount(vp));
4695         if (!NFSHASNFSV4(nmp))
4696                 return;
4697         NFSLOCKCLSTATE();
4698         clp = nfscl_findcl(nmp);
4699         if (clp == NULL) {
4700                 NFSUNLOCKCLSTATE();
4701                 return;
4702         }
4703         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4704         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
4705                 nanotime(&dp->nfsdl_modtime);
4706                 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
4707         }
4708         NFSUNLOCKCLSTATE();
4709 }
4710
4711 /*
4712  * If there is a valid write delegation for this file with a modtime set,
4713  * put that modtime in mtime.
4714  */
4715 APPLESTATIC void
4716 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
4717 {
4718         struct nfsclclient *clp;
4719         struct nfscldeleg *dp;
4720         struct nfsnode *np = VTONFS(vp);
4721         struct nfsmount *nmp;
4722
4723         nmp = VFSTONFS(vnode_mount(vp));
4724         if (!NFSHASNFSV4(nmp))
4725                 return;
4726         NFSLOCKCLSTATE();
4727         clp = nfscl_findcl(nmp);
4728         if (clp == NULL) {
4729                 NFSUNLOCKCLSTATE();
4730                 return;
4731         }
4732         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4733         if (dp != NULL &&
4734             (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
4735             (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
4736                 *mtime = dp->nfsdl_modtime;
4737         NFSUNLOCKCLSTATE();
4738 }
4739
4740 static int
4741 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
4742 {
4743         short *defaulterrp, *errp;
4744
4745         if (!nd->nd_repstat)
4746                 return (0);
4747         if (nd->nd_procnum == NFSPROC_NOOP)
4748                 return (txdr_unsigned(nd->nd_repstat & 0xffff));
4749         if (nd->nd_repstat == EBADRPC)
4750                 return (txdr_unsigned(NFSERR_BADXDR));
4751         if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
4752             nd->nd_repstat == NFSERR_OPILLEGAL)
4753                 return (txdr_unsigned(nd->nd_repstat));
4754         if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
4755             minorvers > NFSV4_MINORVERSION) {
4756                 /* NFSv4.n error. */
4757                 return (txdr_unsigned(nd->nd_repstat));
4758         }
4759         if (nd->nd_procnum < NFSV4OP_CBNOPS)
4760                 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
4761         else
4762                 return (txdr_unsigned(nd->nd_repstat));
4763         while (*++errp)
4764                 if (*errp == (short)nd->nd_repstat)
4765                         return (txdr_unsigned(nd->nd_repstat));
4766         return (txdr_unsigned(*defaulterrp));
4767 }
4768
4769 /*
4770  * Called to find/add a layout to a client.
4771  * This function returns the layout with a refcnt (shared lock) upon
4772  * success (returns 0) or with no lock/refcnt on the layout when an
4773  * error is returned.
4774  * If a layout is passed in via lypp, it is locked (exclusively locked).
4775  */
4776 APPLESTATIC int
4777 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4778     nfsv4stateid_t *stateidp, int retonclose,
4779     struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
4780     struct ucred *cred, NFSPROC_T *p)
4781 {
4782         struct nfsclclient *clp;
4783         struct nfscllayout *lyp, *tlyp;
4784         struct nfsclflayout *flp;
4785         struct nfsnode *np = VTONFS(vp);
4786         mount_t mp;
4787         int layout_passed_in;
4788
4789         mp = nmp->nm_mountp;
4790         layout_passed_in = 1;
4791         tlyp = NULL;
4792         lyp = *lypp;
4793         if (lyp == NULL) {
4794                 layout_passed_in = 0;
4795                 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
4796                     M_WAITOK | M_ZERO);
4797         }
4798
4799         NFSLOCKCLSTATE();
4800         clp = nmp->nm_clp;
4801         if (clp == NULL) {
4802                 if (layout_passed_in != 0)
4803                         nfsv4_unlock(&lyp->nfsly_lock, 0);
4804                 NFSUNLOCKCLSTATE();
4805                 if (tlyp != NULL)
4806                         free(tlyp, M_NFSLAYOUT);
4807                 return (EPERM);
4808         }
4809         if (lyp == NULL) {
4810                 /*
4811                  * Although no lyp was passed in, another thread might have
4812                  * allocated one. If one is found, just increment it's ref
4813                  * count and return it.
4814                  */
4815                 lyp = nfscl_findlayout(clp, fhp, fhlen);
4816                 if (lyp == NULL) {
4817                         lyp = tlyp;
4818                         tlyp = NULL;
4819                         lyp->nfsly_stateid.seqid = stateidp->seqid;
4820                         lyp->nfsly_stateid.other[0] = stateidp->other[0];
4821                         lyp->nfsly_stateid.other[1] = stateidp->other[1];
4822                         lyp->nfsly_stateid.other[2] = stateidp->other[2];
4823                         lyp->nfsly_lastbyte = 0;
4824                         LIST_INIT(&lyp->nfsly_flayread);
4825                         LIST_INIT(&lyp->nfsly_flayrw);
4826                         LIST_INIT(&lyp->nfsly_recall);
4827                         lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
4828                         lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
4829                         lyp->nfsly_clp = clp;
4830                         lyp->nfsly_flags = (retonclose != 0) ?
4831                             (NFSLY_FILES | NFSLY_RETONCLOSE) : NFSLY_FILES;
4832                         lyp->nfsly_fhlen = fhlen;
4833                         NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
4834                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4835                         LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
4836                             nfsly_hash);
4837                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4838                         nfscl_layoutcnt++;
4839                 } else {
4840                         if (retonclose != 0)
4841                                 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
4842                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4843                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4844                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4845                 }
4846                 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
4847                 if (NFSCL_FORCEDISM(mp)) {
4848                         NFSUNLOCKCLSTATE();
4849                         if (tlyp != NULL)
4850                                 free(tlyp, M_NFSLAYOUT);
4851                         return (EPERM);
4852                 }
4853                 *lypp = lyp;
4854         } else
4855                 lyp->nfsly_stateid.seqid = stateidp->seqid;
4856
4857         /* Merge the new list of File Layouts into the list. */
4858         flp = LIST_FIRST(fhlp);
4859         if (flp != NULL) {
4860                 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
4861                         nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
4862                 else
4863                         nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
4864         }
4865         if (layout_passed_in != 0)
4866                 nfsv4_unlock(&lyp->nfsly_lock, 1);
4867         NFSUNLOCKCLSTATE();
4868         if (tlyp != NULL)
4869                 free(tlyp, M_NFSLAYOUT);
4870         return (0);
4871 }
4872
4873 /*
4874  * Search for a layout by MDS file handle.
4875  * If one is found, it is returned with a refcnt (shared lock) iff
4876  * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
4877  * returned NULL.
4878  */
4879 struct nfscllayout *
4880 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
4881     uint64_t off, struct nfsclflayout **retflpp, int *recalledp)
4882 {
4883         struct nfscllayout *lyp;
4884         mount_t mp;
4885         int error, igotlock;
4886
4887         mp = clp->nfsc_nmp->nm_mountp;
4888         *recalledp = 0;
4889         *retflpp = NULL;
4890         NFSLOCKCLSTATE();
4891         lyp = nfscl_findlayout(clp, fhp, fhlen);
4892         if (lyp != NULL) {
4893                 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
4894                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4895                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4896                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4897                         error = nfscl_findlayoutforio(lyp, off,
4898                             NFSV4OPEN_ACCESSREAD, retflpp);
4899                         if (error == 0)
4900                                 nfsv4_getref(&lyp->nfsly_lock, NULL,
4901                                     NFSCLSTATEMUTEXPTR, mp);
4902                         else {
4903                                 do {
4904                                         igotlock = nfsv4_lock(&lyp->nfsly_lock,
4905                                             1, NULL, NFSCLSTATEMUTEXPTR, mp);
4906                                 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
4907                                 *retflpp = NULL;
4908                         }
4909                         if (NFSCL_FORCEDISM(mp)) {
4910                                 lyp = NULL;
4911                                 *recalledp = 1;
4912                         }
4913                 } else {
4914                         lyp = NULL;
4915                         *recalledp = 1;
4916                 }
4917         }
4918         NFSUNLOCKCLSTATE();
4919         return (lyp);
4920 }
4921
4922 /*
4923  * Search for a layout by MDS file handle. If one is found, mark in to be
4924  * recalled, if it already marked "return on close".
4925  */
4926 static void
4927 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
4928     int fhlen, struct nfsclrecalllayout **recallpp)
4929 {
4930         struct nfscllayout *lyp;
4931         uint32_t iomode;
4932
4933         if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) ||
4934             nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
4935             (VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
4936                 return;
4937         lyp = nfscl_findlayout(clp, fhp, fhlen);
4938         if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE |
4939             NFSLY_RECALL)) == NFSLY_RETONCLOSE) {
4940                 iomode = 0;
4941                 if (!LIST_EMPTY(&lyp->nfsly_flayread))
4942                         iomode |= NFSLAYOUTIOMODE_READ;
4943                 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
4944                         iomode |= NFSLAYOUTIOMODE_RW;
4945                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
4946                     0, UINT64_MAX, lyp->nfsly_stateid.seqid, *recallpp);
4947                 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
4948                 *recallpp = NULL;
4949         }
4950 }
4951
4952 /*
4953  * Dereference a layout.
4954  */
4955 void
4956 nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
4957 {
4958
4959         NFSLOCKCLSTATE();
4960         if (exclocked != 0)
4961                 nfsv4_unlock(&lyp->nfsly_lock, 0);
4962         else
4963                 nfsv4_relref(&lyp->nfsly_lock);
4964         NFSUNLOCKCLSTATE();
4965 }
4966
4967 /*
4968  * Search for a devinfo by deviceid. If one is found, return it after
4969  * acquiring a reference count on it.
4970  */
4971 struct nfscldevinfo *
4972 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
4973     struct nfscldevinfo *dip)
4974 {
4975
4976         NFSLOCKCLSTATE();
4977         if (dip == NULL)
4978                 dip = nfscl_finddevinfo(clp, deviceid);
4979         if (dip != NULL)
4980                 dip->nfsdi_refcnt++;
4981         NFSUNLOCKCLSTATE();
4982         return (dip);
4983 }
4984
4985 /*
4986  * Dereference a devinfo structure.
4987  */
4988 static void
4989 nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
4990 {
4991
4992         dip->nfsdi_refcnt--;
4993         if (dip->nfsdi_refcnt == 0)
4994                 wakeup(&dip->nfsdi_refcnt);
4995 }
4996
4997 /*
4998  * Dereference a devinfo structure.
4999  */
5000 void
5001 nfscl_reldevinfo(struct nfscldevinfo *dip)
5002 {
5003
5004         NFSLOCKCLSTATE();
5005         nfscl_reldevinfo_locked(dip);
5006         NFSUNLOCKCLSTATE();
5007 }
5008
5009 /*
5010  * Find a layout for this file handle. Return NULL upon failure.
5011  */
5012 static struct nfscllayout *
5013 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
5014 {
5015         struct nfscllayout *lyp;
5016
5017         LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
5018                 if (lyp->nfsly_fhlen == fhlen &&
5019                     !NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
5020                         break;
5021         return (lyp);
5022 }
5023
5024 /*
5025  * Find a devinfo for this deviceid. Return NULL upon failure.
5026  */
5027 static struct nfscldevinfo *
5028 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
5029 {
5030         struct nfscldevinfo *dip;
5031
5032         LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
5033                 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
5034                     == 0)
5035                         break;
5036         return (dip);
5037 }
5038
5039 /*
5040  * Merge the new file layout list into the main one, maintaining it in
5041  * increasing offset order.
5042  */
5043 static void
5044 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
5045     struct nfsclflayouthead *newfhlp)
5046 {
5047         struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
5048
5049         flp = LIST_FIRST(fhlp);
5050         prevflp = NULL;
5051         LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
5052                 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
5053                         prevflp = flp;
5054                         flp = LIST_NEXT(flp, nfsfl_list);
5055                 }
5056                 if (prevflp == NULL)
5057                         LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
5058                 else
5059                         LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
5060                 prevflp = nflp;
5061         }
5062 }
5063
5064 /*
5065  * Add this nfscldevinfo to the client, if it doesn't already exist.
5066  * This function consumes the structure pointed at by dip, if not NULL.
5067  */
5068 APPLESTATIC int
5069 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip,
5070     struct nfsclflayout *flp)
5071 {
5072         struct nfsclclient *clp;
5073         struct nfscldevinfo *tdip;
5074
5075         NFSLOCKCLSTATE();
5076         clp = nmp->nm_clp;
5077         if (clp == NULL) {
5078                 NFSUNLOCKCLSTATE();
5079                 if (dip != NULL)
5080                         free(dip, M_NFSDEVINFO);
5081                 return (ENODEV);
5082         }
5083         tdip = nfscl_finddevinfo(clp, flp->nfsfl_dev);
5084         if (tdip != NULL) {
5085                 tdip->nfsdi_layoutrefs++;
5086                 flp->nfsfl_devp = tdip;
5087                 nfscl_reldevinfo_locked(tdip);
5088                 NFSUNLOCKCLSTATE();
5089                 if (dip != NULL)
5090                         free(dip, M_NFSDEVINFO);
5091                 return (0);
5092         }
5093         if (dip != NULL) {
5094                 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
5095                 dip->nfsdi_layoutrefs = 1;
5096                 flp->nfsfl_devp = dip;
5097         }
5098         NFSUNLOCKCLSTATE();
5099         if (dip == NULL)
5100                 return (ENODEV);
5101         return (0);
5102 }
5103
5104 /*
5105  * Free up a layout structure and associated file layout structure(s).
5106  */
5107 APPLESTATIC void
5108 nfscl_freelayout(struct nfscllayout *layp)
5109 {
5110         struct nfsclflayout *flp, *nflp;
5111         struct nfsclrecalllayout *rp, *nrp;
5112
5113         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
5114                 LIST_REMOVE(flp, nfsfl_list);
5115                 nfscl_freeflayout(flp);
5116         }
5117         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
5118                 LIST_REMOVE(flp, nfsfl_list);
5119                 nfscl_freeflayout(flp);
5120         }
5121         LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
5122                 LIST_REMOVE(rp, nfsrecly_list);
5123                 free(rp, M_NFSLAYRECALL);
5124         }
5125         nfscl_layoutcnt--;
5126         free(layp, M_NFSLAYOUT);
5127 }
5128
5129 /*
5130  * Free up a file layout structure.
5131  */
5132 APPLESTATIC void
5133 nfscl_freeflayout(struct nfsclflayout *flp)
5134 {
5135         int i;
5136
5137         for (i = 0; i < flp->nfsfl_fhcnt; i++)
5138                 free(flp->nfsfl_fh[i], M_NFSFH);
5139         if (flp->nfsfl_devp != NULL)
5140                 flp->nfsfl_devp->nfsdi_layoutrefs--;
5141         free(flp, M_NFSFLAYOUT);
5142 }
5143
5144 /*
5145  * Free up a file layout devinfo structure.
5146  */
5147 APPLESTATIC void
5148 nfscl_freedevinfo(struct nfscldevinfo *dip)
5149 {
5150
5151         free(dip, M_NFSDEVINFO);
5152 }
5153
5154 /*
5155  * Mark any layouts that match as recalled.
5156  */
5157 static int
5158 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
5159     uint64_t off, uint64_t len, uint32_t stateseqid,
5160     struct nfsclrecalllayout *recallp)
5161 {
5162         struct nfsclrecalllayout *rp, *orp;
5163
5164         recallp->nfsrecly_recalltype = recalltype;
5165         recallp->nfsrecly_iomode = iomode;
5166         recallp->nfsrecly_stateseqid = stateseqid;
5167         recallp->nfsrecly_off = off;
5168         recallp->nfsrecly_len = len;
5169         /*
5170          * Order the list as file returns first, followed by fsid and any
5171          * returns, both in increasing stateseqid order.
5172          * Note that the seqids wrap around, so 1 is after 0xffffffff.
5173          * (I'm not sure this is correct because I find RFC5661 confusing
5174          *  on this, but hopefully it will work ok.)
5175          */
5176         orp = NULL;
5177         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5178                 orp = rp;
5179                 if ((recalltype == NFSLAYOUTRETURN_FILE &&
5180                      (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
5181                       nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
5182                     (recalltype != NFSLAYOUTRETURN_FILE &&
5183                      rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
5184                      nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
5185                         LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
5186                         break;
5187                 }
5188         }
5189         if (rp == NULL) {
5190                 if (orp == NULL)
5191                         LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
5192                             nfsrecly_list);
5193                 else
5194                         LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
5195         }
5196         lyp->nfsly_flags |= NFSLY_RECALL;
5197         return (0);
5198 }
5199
5200 /*
5201  * Compare the two seqids for ordering. The trick is that the seqids can
5202  * wrap around from 0xffffffff->0, so check for the cases where one
5203  * has wrapped around.
5204  * Return 1 if seqid1 comes before seqid2, 0 otherwise.
5205  */
5206 static int
5207 nfscl_seq(uint32_t seqid1, uint32_t seqid2)
5208 {
5209
5210         if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
5211                 /* seqid2 has wrapped around. */
5212                 return (0);
5213         if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
5214                 /* seqid1 has wrapped around. */
5215                 return (1);
5216         if (seqid1 <= seqid2)
5217                 return (1);
5218         return (0);
5219 }
5220
5221 /*
5222  * Do a layout return for each of the recalls.
5223  */
5224 static void
5225 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
5226     struct ucred *cred, NFSPROC_T *p)
5227 {
5228         struct nfsclrecalllayout *rp;
5229         nfsv4stateid_t stateid;
5230
5231         NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
5232         stateid.seqid = lyp->nfsly_stateid.seqid;
5233         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5234                 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
5235                     lyp->nfsly_fhlen, 0, NFSLAYOUT_NFSV4_1_FILES,
5236                     rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
5237                     rp->nfsrecly_off, rp->nfsrecly_len,
5238                     &stateid, 0, NULL, cred, p, NULL);
5239         }
5240 }
5241
5242 /*
5243  * Do the layout commit for a file layout.
5244  */
5245 static void
5246 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
5247     struct ucred *cred, NFSPROC_T *p)
5248 {
5249         struct nfsclflayout *flp;
5250         uint64_t len;
5251         int error;
5252
5253         LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
5254                 if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
5255                         len = flp->nfsfl_end - flp->nfsfl_off;
5256                         error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
5257                             lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
5258                             lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
5259                             NFSLAYOUT_NFSV4_1_FILES, 0, NULL, cred, p, NULL);
5260                         NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
5261                         if (error == NFSERR_NOTSUPP) {
5262                                 /* If not supported, don't bother doing it. */
5263                                 NFSLOCKMNT(nmp);
5264                                 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5265                                 NFSUNLOCKMNT(nmp);
5266                                 break;
5267                         }
5268                 }
5269         }
5270 }
5271
5272 /*
5273  * Commit all layouts for a file (vnode).
5274  */
5275 int
5276 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
5277 {
5278         struct nfsclclient *clp;
5279         struct nfscllayout *lyp;
5280         struct nfsnode *np = VTONFS(vp);
5281         mount_t mp;
5282         struct nfsmount *nmp;
5283
5284         mp = vnode_mount(vp);
5285         nmp = VFSTONFS(mp);
5286         if (NFSHASNOLAYOUTCOMMIT(nmp))
5287                 return (0);
5288         NFSLOCKCLSTATE();
5289         clp = nmp->nm_clp;
5290         if (clp == NULL) {
5291                 NFSUNLOCKCLSTATE();
5292                 return (EPERM);
5293         }
5294         lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5295         if (lyp == NULL) {
5296                 NFSUNLOCKCLSTATE();
5297                 return (EPERM);
5298         }
5299         nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5300         if (NFSCL_FORCEDISM(mp)) {
5301                 NFSUNLOCKCLSTATE();
5302                 return (EPERM);
5303         }
5304 tryagain:
5305         if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
5306                 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
5307                 NFSUNLOCKCLSTATE();
5308                 NFSCL_DEBUG(4, "do layoutcommit2\n");
5309                 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
5310                 NFSLOCKCLSTATE();
5311                 goto tryagain;
5312         }
5313         nfsv4_relref(&lyp->nfsly_lock);
5314         NFSUNLOCKCLSTATE();
5315         return (0);
5316 }
5317