sys/fs/nfsclient/nfs_clstate.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 Rick Macklem, University of Guelph
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 /*
  34  * These functions implement the client side state handling for NFSv4.
  35  * NFSv4 state handling:
  36  * - A lockowner is used to determine lock contention, so it
  37  *   corresponds directly to a Posix pid. (1 to 1 mapping)
  38  * - The correct granularity of an OpenOwner is not nearly so
  39  *   obvious. An OpenOwner does the following:
  40  *   - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
  41  *   - is used to check for Open/Share contention (not applicable to
  42  *     this client, since all Opens are Deny_None)
  43  *   As such, I considered both extreme.
  44  *   1 OpenOwner per ClientID - Simple to manage, but fully serializes
  45  *   all Open, Close and Lock (with a new lockowner) Ops.
  46  *   1 OpenOwner for each Open - This one results in an OpenConfirm for
  47  *   every Open, for most servers.
  48  *   So, I chose to use the same mapping as I did for LockOwnwers.
  49  *   The main concern here is that you can end up with multiple Opens
  50  *   for the same File Handle, but on different OpenOwners (opens
  51  *   inherited from parents, grandparents...) and you do not know
  52  *   which of these the vnodeop close applies to. This is handled by
  53  *   delaying the Close Op(s) until all of the Opens have been closed.
  54  *   (It is not yet obvious if this is the correct granularity.)
  55  * - How the code handles serialization:
  56  *   - For the ClientId, it uses an exclusive lock while getting its
  57  *     SetClientId and during recovery. Otherwise, it uses a shared
  58  *     lock via a reference count.
  59  *   - For the rest of the data structures, it uses an SMP mutex
  60  *     (once the nfs client is SMP safe) and doesn't sleep while
  61  *     manipulating the linked lists.
  62  *   - The serialization of Open/Close/Lock/LockU falls out in the
  63  *     "wash", since OpenOwners and LockOwners are both mapped from
  64  *     Posix pid. In other words, there is only one Posix pid using
  65  *     any given owner, so that owner is serialized. (If you change
  66  *     the granularity of the OpenOwner, then code must be added to
  67  *     serialize Ops on the OpenOwner.)
  68  * - When to get rid of OpenOwners and LockOwners.
  69  *   - The function nfscl_cleanup_common() is executed after a process exits.
  70  *     It goes through the client list looking for all Open and Lock Owners.
  71  *     When one is found, it is marked "defunct" or in the case of
  72  *     an OpenOwner without any Opens, freed.
  73  *     The renew thread scans for defunct Owners and gets rid of them,
  74  *     if it can. The LockOwners will also be deleted when the
  75  *     associated Open is closed.
  76  *   - If the LockU or Close Op(s) fail during close in a way
  77  *     that could be recovered upon retry, they are relinked to the
  78  *     ClientId's defunct open list and retried by the renew thread
  79  *     until they succeed or an unmount/recovery occurs.
  80  *     (Since we are done with them, they do not need to be recovered.)
  81  */
  82
  83 #ifndef APPLEKEXT
  84 #include <fs/nfs/nfsport.h>
  85
  86 /*
  87  * Global variables
  88  */
  89 extern struct nfsstatsv1 nfsstatsv1;
  90 extern struct nfsreqhead nfsd_reqq;
  91 extern u_int32_t newnfs_false, newnfs_true;
  92 extern int nfscl_debuglevel;
  93 extern int nfscl_enablecallb;
  94 extern int nfs_numnfscbd;
  95 NFSREQSPINLOCK;
  96 NFSCLSTATEMUTEX;
  97 int nfscl_inited = 0;
  98 struct nfsclhead nfsclhead;     /* Head of clientid list */
  99 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
 100 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER;
 101 #endif  /* !APPLEKEXT */
 102
 103 static int nfscl_delegcnt = 0;
 104 static int nfscl_layoutcnt = 0;
 105 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *,
 106     u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **);
 107 static void nfscl_clrelease(struct nfsclclient *);
 108 static void nfscl_cleanclient(struct nfsclclient *);
 109 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
 110     struct ucred *, NFSPROC_T *);
 111 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
 112     struct nfsmount *, struct ucred *, NFSPROC_T *);
 113 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *);
 114 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
 115     struct nfscllock *, int);
 116 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
 117     struct nfscllock **, int);
 118 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
 119 static u_int32_t nfscl_nextcbident(void);
 120 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **);
 121 static struct nfsclclient *nfscl_getclnt(u_int32_t);
 122 static struct nfsclclient *nfscl_getclntsess(uint8_t *);
 123 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
 124     int);
 125 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *,
 126     int, struct nfsclrecalllayout **);
 127 static void nfscl_reldevinfo_locked(struct nfscldevinfo *);
 128 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *,
 129     int);
 130 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *);
 131 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
 132     u_int8_t *, struct nfscllock **);
 133 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
 134 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
 135     struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
 136 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
 137     struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
 138     struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *);
 139 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
 140     struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
 141     struct nfscldeleg *, struct ucred *, NFSPROC_T *);
 142 static void nfscl_totalrecall(struct nfsclclient *);
 143 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
 144     struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
 145 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
 146     u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
 147     struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
 148 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
 149     int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
 150     struct ucred *, NFSPROC_T *);
 151 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
 152     struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
 153 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *);
 154 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t);
 155 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
 156 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
 157     struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int);
 158 static void nfscl_freeopenowner(struct nfsclowner *, int);
 159 static void nfscl_cleandeleg(struct nfscldeleg *);
 160 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *,
 161     struct nfsmount *, NFSPROC_T *);
 162 static void nfscl_emptylockowner(struct nfscllockowner *,
 163     struct nfscllockownerfhhead *);
 164 static void nfscl_mergeflayouts(struct nfsclflayouthead *,
 165     struct nfsclflayouthead *);
 166 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t,
 167     uint64_t, uint32_t, struct nfsclrecalllayout *);
 168 static int nfscl_seq(uint32_t, uint32_t);
 169 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *,
 170     struct ucred *, NFSPROC_T *);
 171 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *,
 172     struct ucred *, NFSPROC_T *);
 173
 174 static short nfscberr_null[] = {
 175         0,
 176         0,
 177 };
 178
 179 static short nfscberr_getattr[] = {
 180         NFSERR_RESOURCE,
 181         NFSERR_BADHANDLE,
 182         NFSERR_BADXDR,
 183         NFSERR_RESOURCE,
 184         NFSERR_SERVERFAULT,
 185         0,
 186 };
 187
 188 static short nfscberr_recall[] = {
 189         NFSERR_RESOURCE,
 190         NFSERR_BADHANDLE,
 191         NFSERR_BADSTATEID,
 192         NFSERR_BADXDR,
 193         NFSERR_RESOURCE,
 194         NFSERR_SERVERFAULT,
 195         0,
 196 };
 197
 198 static short *nfscl_cberrmap[] = {
 199         nfscberr_null,
 200         nfscberr_null,
 201         nfscberr_null,
 202         nfscberr_getattr,
 203         nfscberr_recall
 204 };
 205
 206 #define NETFAMILY(clp) \
 207                 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
 208
 209 /*
 210  * Called for an open operation.
 211  * If the nfhp argument is NULL, just get an openowner.
 212  */
 213 APPLESTATIC int
 214 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
 215     struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
 216     struct nfsclopen **opp, int *newonep, int *retp, int lockit)
 217 {
 218         struct nfsclclient *clp;
 219         struct nfsclowner *owp, *nowp;
 220         struct nfsclopen *op = NULL, *nop = NULL;
 221         struct nfscldeleg *dp;
 222         struct nfsclownerhead *ohp;
 223         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 224         int ret;
 225
 226         if (newonep != NULL)
 227                 *newonep = 0;
 228         if (opp != NULL)
 229                 *opp = NULL;
 230         if (owpp != NULL)
 231                 *owpp = NULL;
 232
 233         /*
 234          * Might need one or both of these, so MALLOC them now, to
 235          * avoid a tsleep() in MALLOC later.
 236          */
 237         nowp = malloc(sizeof (struct nfsclowner),
 238             M_NFSCLOWNER, M_WAITOK);
 239         if (nfhp != NULL)
 240             nop = malloc(sizeof (struct nfsclopen) +
 241                 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
 242         ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
 243         if (ret != 0) {
 244                 free(nowp, M_NFSCLOWNER);
 245                 if (nop != NULL)
 246                         free(nop, M_NFSCLOPEN);
 247                 return (ret);
 248         }
 249
 250         /*
 251          * Get the Open iff it already exists.
 252          * If none found, add the new one or return error, depending upon
 253          * "create".
 254          */
 255         NFSLOCKCLSTATE();
 256         dp = NULL;
 257         /* First check the delegation list */
 258         if (nfhp != NULL && usedeleg) {
 259                 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
 260                         if (dp->nfsdl_fhlen == fhlen &&
 261                             !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
 262                                 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
 263                                     (dp->nfsdl_flags & NFSCLDL_WRITE))
 264                                         break;
 265                                 dp = NULL;
 266                                 break;
 267                         }
 268                 }
 269         }
 270
 271         if (dp != NULL) {
 272                 nfscl_filllockowner(p->td_proc, own, F_POSIX);
 273                 ohp = &dp->nfsdl_owner;
 274         } else {
 275                 /* For NFSv4.1 and this option, use a single open_owner. */
 276                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
 277                         nfscl_filllockowner(NULL, own, F_POSIX);
 278                 else
 279                         nfscl_filllockowner(p->td_proc, own, F_POSIX);
 280                 ohp = &clp->nfsc_owner;
 281         }
 282         /* Now, search for an openowner */
 283         LIST_FOREACH(owp, ohp, nfsow_list) {
 284                 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
 285                         break;
 286         }
 287
 288         /*
 289          * Create a new open, as required.
 290          */
 291         nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
 292             cred, newonep);
 293
 294         /*
 295          * Now, check the mode on the open and return the appropriate
 296          * value.
 297          */
 298         if (retp != NULL) {
 299                 if (nfhp != NULL && dp != NULL && nop == NULL)
 300                         /* new local open on delegation */
 301                         *retp = NFSCLOPEN_SETCRED;
 302                 else
 303                         *retp = NFSCLOPEN_OK;
 304         }
 305         if (op != NULL && (amode & ~(op->nfso_mode))) {
 306                 op->nfso_mode |= amode;
 307                 if (retp != NULL && dp == NULL)
 308                         *retp = NFSCLOPEN_DOOPEN;
 309         }
 310
 311         /*
 312          * Serialize modifications to the open owner for multiple threads
 313          * within the same process using a read/write sleep lock.
 314          * For NFSv4.1 and a single OpenOwner, allow concurrent open operations
 315          * by acquiring a shared lock.  The close operations still use an
 316          * exclusive lock for this case.
 317          */
 318         if (lockit != 0) {
 319                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) {
 320                         /*
 321                          * Get a shared lock on the OpenOwner, but first
 322                          * wait for any pending exclusive lock, so that the
 323                          * exclusive locker gets priority.
 324                          */
 325                         nfsv4_lock(&owp->nfsow_rwlock, 0, NULL,
 326                             NFSCLSTATEMUTEXPTR, NULL);
 327                         nfsv4_getref(&owp->nfsow_rwlock, NULL,
 328                             NFSCLSTATEMUTEXPTR, NULL);
 329                 } else
 330                         nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
 331         }
 332         NFSUNLOCKCLSTATE();
 333         if (nowp != NULL)
 334                 free(nowp, M_NFSCLOWNER);
 335         if (nop != NULL)
 336                 free(nop, M_NFSCLOPEN);
 337         if (owpp != NULL)
 338                 *owpp = owp;
 339         if (opp != NULL)
 340                 *opp = op;
 341         return (0);
 342 }
 343
 344 /*
 345  * Create a new open, as required.
 346  */
 347 static void
 348 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
 349     struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
 350     struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
 351     struct ucred *cred, int *newonep)
 352 {
 353         struct nfsclowner *owp = *owpp, *nowp;
 354         struct nfsclopen *op, *nop;
 355
 356         if (nowpp != NULL)
 357                 nowp = *nowpp;
 358         else
 359                 nowp = NULL;
 360         if (nopp != NULL)
 361                 nop = *nopp;
 362         else
 363                 nop = NULL;
 364         if (owp == NULL && nowp != NULL) {
 365                 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
 366                 LIST_INIT(&nowp->nfsow_open);
 367                 nowp->nfsow_clp = clp;
 368                 nowp->nfsow_seqid = 0;
 369                 nowp->nfsow_defunct = 0;
 370                 nfscl_lockinit(&nowp->nfsow_rwlock);
 371                 if (dp != NULL) {
 372                         nfsstatsv1.cllocalopenowners++;
 373                         LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
 374                 } else {
 375                         nfsstatsv1.clopenowners++;
 376                         LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
 377                 }
 378                 owp = *owpp = nowp;
 379                 *nowpp = NULL;
 380                 if (newonep != NULL)
 381                         *newonep = 1;
 382         }
 383
 384          /* If an fhp has been specified, create an Open as well. */
 385         if (fhp != NULL) {
 386                 /* and look for the correct open, based upon FH */
 387                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 388                         if (op->nfso_fhlen == fhlen &&
 389                             !NFSBCMP(op->nfso_fh, fhp, fhlen))
 390                                 break;
 391                 }
 392                 if (op == NULL && nop != NULL) {
 393                         nop->nfso_own = owp;
 394                         nop->nfso_mode = 0;
 395                         nop->nfso_opencnt = 0;
 396                         nop->nfso_posixlock = 1;
 397                         nop->nfso_fhlen = fhlen;
 398                         NFSBCOPY(fhp, nop->nfso_fh, fhlen);
 399                         LIST_INIT(&nop->nfso_lock);
 400                         nop->nfso_stateid.seqid = 0;
 401                         nop->nfso_stateid.other[0] = 0;
 402                         nop->nfso_stateid.other[1] = 0;
 403                         nop->nfso_stateid.other[2] = 0;
 404                         KASSERT(cred != NULL, ("%s: cred NULL\n", __func__));
 405                         newnfs_copyincred(cred, &nop->nfso_cred);
 406                         if (dp != NULL) {
 407                                 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
 408                                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
 409                                     nfsdl_list);
 410                                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
 411                                 nfsstatsv1.cllocalopens++;
 412                         } else {
 413                                 nfsstatsv1.clopens++;
 414                         }
 415                         LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
 416                         *opp = nop;
 417                         *nopp = NULL;
 418                         if (newonep != NULL)
 419                                 *newonep = 1;
 420                 } else {
 421                         *opp = op;
 422                 }
 423         }
 424 }
 425
 426 /*
 427  * Called to find/add a delegation to a client.
 428  */
 429 APPLESTATIC int
 430 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
 431     int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
 432 {
 433         struct nfscldeleg *dp = *dpp, *tdp;
 434
 435         /*
 436          * First, if we have received a Read delegation for a file on a
 437          * read/write file system, just return it, because they aren't
 438          * useful, imho.
 439          */
 440         if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) &&
 441             (dp->nfsdl_flags & NFSCLDL_READ)) {
 442                 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p);
 443                 free(dp, M_NFSCLDELEG);
 444                 *dpp = NULL;
 445                 return (0);
 446         }
 447
 448         /* Look for the correct deleg, based upon FH */
 449         NFSLOCKCLSTATE();
 450         tdp = nfscl_finddeleg(clp, nfhp, fhlen);
 451         if (tdp == NULL) {
 452                 if (dp == NULL) {
 453                         NFSUNLOCKCLSTATE();
 454                         return (NFSERR_BADSTATEID);
 455                 }
 456                 *dpp = NULL;
 457                 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
 458                 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
 459                     nfsdl_hash);
 460                 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
 461                 nfsstatsv1.cldelegates++;
 462                 nfscl_delegcnt++;
 463         } else {
 464                 /*
 465                  * Delegation already exists, what do we do if a new one??
 466                  */
 467                 if (dp != NULL) {
 468                         printf("Deleg already exists!\n");
 469                         free(dp, M_NFSCLDELEG);
 470                         *dpp = NULL;
 471                 } else {
 472                         *dpp = tdp;
 473                 }
 474         }
 475         NFSUNLOCKCLSTATE();
 476         return (0);
 477 }
 478
 479 /*
 480  * Find a delegation for this file handle. Return NULL upon failure.
 481  */
 482 static struct nfscldeleg *
 483 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
 484 {
 485         struct nfscldeleg *dp;
 486
 487         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
 488             if (dp->nfsdl_fhlen == fhlen &&
 489                 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
 490                 break;
 491         }
 492         return (dp);
 493 }
 494
 495 /*
 496  * Get a stateid for an I/O operation. First, look for an open and iff
 497  * found, return either a lockowner stateid or the open stateid.
 498  * If no Open is found, just return error and the special stateid of all zeros.
 499  */
 500 APPLESTATIC int
 501 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
 502     int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
 503     void **lckpp)
 504 {
 505         struct nfsclclient *clp;
 506         struct nfsclowner *owp;
 507         struct nfsclopen *op = NULL, *top;
 508         struct nfscllockowner *lp;
 509         struct nfscldeleg *dp;
 510         struct nfsnode *np;
 511         struct nfsmount *nmp;
 512         u_int8_t own[NFSV4CL_LOCKNAMELEN];
 513         int error, done;
 514
 515         *lckpp = NULL;
 516         /*
 517          * Initially, just set the special stateid of all zeros.
 518          * (Don't do this for a DS, since the special stateid can't be used.)
 519          */
 520         if (fords == 0) {
 521                 stateidp->seqid = 0;
 522                 stateidp->other[0] = 0;
 523                 stateidp->other[1] = 0;
 524                 stateidp->other[2] = 0;
 525         }
 526         if (vnode_vtype(vp) != VREG)
 527                 return (EISDIR);
 528         np = VTONFS(vp);
 529         nmp = VFSTONFS(vnode_mount(vp));
 530         NFSLOCKCLSTATE();
 531         clp = nfscl_findcl(nmp);
 532         if (clp == NULL) {
 533                 NFSUNLOCKCLSTATE();
 534                 return (EACCES);
 535         }
 536
 537         /*
 538          * Wait for recovery to complete.
 539          */
 540         while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
 541                 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
 542                     PZERO, "nfsrecvr", NULL);
 543
 544         /*
 545          * First, look for a delegation.
 546          */
 547         LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
 548                 if (dp->nfsdl_fhlen == fhlen &&
 549                     !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
 550                         if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
 551                             (dp->nfsdl_flags & NFSCLDL_WRITE)) {
 552                                 stateidp->seqid = dp->nfsdl_stateid.seqid;
 553                                 stateidp->other[0] = dp->nfsdl_stateid.other[0];
 554                                 stateidp->other[1] = dp->nfsdl_stateid.other[1];
 555                                 stateidp->other[2] = dp->nfsdl_stateid.other[2];
 556                                 if (!(np->n_flag & NDELEGRECALL)) {
 557                                         TAILQ_REMOVE(&clp->nfsc_deleg, dp,
 558                                             nfsdl_list);
 559                                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
 560                                             nfsdl_list);
 561                                         dp->nfsdl_timestamp = NFSD_MONOSEC +
 562                                             120;
 563                                         dp->nfsdl_rwlock.nfslock_usecnt++;
 564                                         *lckpp = (void *)&dp->nfsdl_rwlock;
 565                                 }
 566                                 NFSUNLOCKCLSTATE();
 567                                 return (0);
 568                         }
 569                         break;
 570                 }
 571         }
 572
 573         if (p != NULL) {
 574                 /*
 575                  * If p != NULL, we want to search the parentage tree
 576                  * for a matching OpenOwner and use that.
 577                  */
 578                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
 579                         nfscl_filllockowner(NULL, own, F_POSIX);
 580                 else
 581                         nfscl_filllockowner(p->td_proc, own, F_POSIX);
 582                 lp = NULL;
 583                 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own,
 584                     mode, &lp, &op);
 585                 if (error == 0 && lp != NULL && fords == 0) {
 586                         /* Don't return a lock stateid for a DS. */
 587                         stateidp->seqid =
 588                             lp->nfsl_stateid.seqid;
 589                         stateidp->other[0] =
 590                             lp->nfsl_stateid.other[0];
 591                         stateidp->other[1] =
 592                             lp->nfsl_stateid.other[1];
 593                         stateidp->other[2] =
 594                             lp->nfsl_stateid.other[2];
 595                         NFSUNLOCKCLSTATE();
 596                         return (0);
 597                 }
 598         }
 599         if (op == NULL) {
 600                 /* If not found, just look for any OpenOwner that will work. */
 601                 top = NULL;
 602                 done = 0;
 603                 owp = LIST_FIRST(&clp->nfsc_owner);
 604                 while (!done && owp != NULL) {
 605                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
 606                                 if (op->nfso_fhlen == fhlen &&
 607                                     !NFSBCMP(op->nfso_fh, nfhp, fhlen)) {
 608                                         if (top == NULL && (op->nfso_mode &
 609                                             NFSV4OPEN_ACCESSWRITE) != 0 &&
 610                                             (mode & NFSV4OPEN_ACCESSREAD) != 0)
 611                                                 top = op;
 612                                         if ((mode & op->nfso_mode) == mode) {
 613                                                 done = 1;
 614                                                 break;
 615                                         }
 616                                 }
 617                         }
 618                         if (!done)
 619                                 owp = LIST_NEXT(owp, nfsow_list);
 620                 }
 621                 if (!done) {
 622                         NFSCL_DEBUG(2, "openmode top=%p\n", top);
 623                         if (top == NULL || NFSHASOPENMODE(nmp)) {
 624                                 NFSUNLOCKCLSTATE();
 625                                 return (ENOENT);
 626                         } else
 627                                 op = top;
 628                 }
 629                 /*
 630                  * For read aheads or write behinds, use the open cred.
 631                  * A read ahead or write behind is indicated by p == NULL.
 632                  */
 633                 if (p == NULL)
 634                         newnfs_copycred(&op->nfso_cred, cred);
 635         }
 636
 637         /*
 638          * No lock stateid, so return the open stateid.
 639          */
 640         stateidp->seqid = op->nfso_stateid.seqid;
 641         stateidp->other[0] = op->nfso_stateid.other[0];
 642         stateidp->other[1] = op->nfso_stateid.other[1];
 643         stateidp->other[2] = op->nfso_stateid.other[2];
 644         NFSUNLOCKCLSTATE();
 645         return (0);
 646 }
 647
 648 /*
 649  * Search for a matching file, mode and, optionally, lockowner.
 650  */
 651 static int
 652 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen,
 653     u_int8_t *openown, u_int8_t *lockown, u_int32_t mode,
 654     struct nfscllockowner **lpp, struct nfsclopen **opp)
 655 {
 656         struct nfsclowner *owp;
 657         struct nfsclopen *op, *rop, *rop2;
 658         struct nfscllockowner *lp;
 659         int keep_looping;
 660
 661         if (lpp != NULL)
 662                 *lpp = NULL;
 663         /*
 664          * rop will be set to the open to be returned. There are three
 665          * variants of this, all for an open of the correct file:
 666          * 1 - A match of lockown.
 667          * 2 - A match of the openown, when no lockown match exists.
 668          * 3 - A match for any open, if no openown or lockown match exists.
 669          * Looking for #2 over #3 probably isn't necessary, but since
 670          * RFC3530 is vague w.r.t. the relationship between openowners and
 671          * lockowners, I think this is the safer way to go.
 672          */
 673         rop = NULL;
 674         rop2 = NULL;
 675         keep_looping = 1;
 676         /* Search the client list */
 677         owp = LIST_FIRST(ohp);
 678         while (owp != NULL && keep_looping != 0) {
 679                 /* and look for the correct open */
 680                 op = LIST_FIRST(&owp->nfsow_open);
 681                 while (op != NULL && keep_looping != 0) {
 682                         if (op->nfso_fhlen == fhlen &&
 683                             !NFSBCMP(op->nfso_fh, nfhp, fhlen)
 684                             && (op->nfso_mode & mode) == mode) {
 685                                 if (lpp != NULL) {
 686                                         /* Now look for a matching lockowner. */
 687                                         LIST_FOREACH(lp, &op->nfso_lock,
 688                                             nfsl_list) {
 689                                                 if (!NFSBCMP(lp->nfsl_owner,
 690                                                     lockown,
 691                                                     NFSV4CL_LOCKNAMELEN)) {
 692                                                         *lpp = lp;
 693                                                         rop = op;
 694                                                         keep_looping = 0;
 695                                                         break;
 696                                                 }
 697                                         }
 698                                 }
 699                                 if (rop == NULL && !NFSBCMP(owp->nfsow_owner,
 700                                     openown, NFSV4CL_LOCKNAMELEN)) {
 701                                         rop = op;
 702                                         if (lpp == NULL)
 703                                                 keep_looping = 0;
 704                                 }
 705                                 if (rop2 == NULL)
 706                                         rop2 = op;
 707                         }
 708                         op = LIST_NEXT(op, nfso_list);
 709                 }
 710                 owp = LIST_NEXT(owp, nfsow_list);
 711         }
 712         if (rop == NULL)
 713                 rop = rop2;
 714         if (rop == NULL)
 715                 return (EBADF);
 716         *opp = rop;
 717         return (0);
 718 }
 719
 720 /*
 721  * Release use of an open owner. Called when open operations are done
 722  * with the open owner.
 723  */
 724 APPLESTATIC void
 725 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp,
 726     __unused int error, __unused int candelete, int unlocked)
 727 {
 728
 729         if (owp == NULL)
 730                 return;
 731         NFSLOCKCLSTATE();
 732         if (unlocked == 0) {
 733                 if (NFSHASONEOPENOWN(nmp))
 734                         nfsv4_relref(&owp->nfsow_rwlock);
 735                 else
 736                         nfscl_lockunlock(&owp->nfsow_rwlock);
 737         }
 738         nfscl_clrelease(owp->nfsow_clp);
 739         NFSUNLOCKCLSTATE();
 740 }
 741
 742 /*
 743  * Release use of an open structure under an open owner.
 744  */
 745 APPLESTATIC void
 746 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error,
 747     int candelete)
 748 {
 749         struct nfsclclient *clp;
 750         struct nfsclowner *owp;
 751
 752         if (op == NULL)
 753                 return;
 754         NFSLOCKCLSTATE();
 755         owp = op->nfso_own;
 756         if (NFSHASONEOPENOWN(nmp))
 757                 nfsv4_relref(&owp->nfsow_rwlock);
 758         else
 759                 nfscl_lockunlock(&owp->nfsow_rwlock);
 760         clp = owp->nfsow_clp;
 761         if (error && candelete && op->nfso_opencnt == 0)
 762                 nfscl_freeopen(op, 0);
 763         nfscl_clrelease(clp);
 764         NFSUNLOCKCLSTATE();
 765 }
 766
 767 /*
 768  * Called to get a clientid structure. It will optionally lock the
 769  * client data structures to do the SetClientId/SetClientId_confirm,
 770  * but will release that lock and return the clientid with a reference
 771  * count on it.
 772  * If the "cred" argument is NULL, a new clientid should not be created.
 773  * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
 774  * be done.
 775  * The start_renewthread argument tells nfscl_getcl() to start a renew
 776  * thread if this creates a new clp.
 777  * It always clpp with a reference count on it, unless returning an error.
 778  */
 779 APPLESTATIC int
 780 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p,
 781     int start_renewthread, struct nfsclclient **clpp)
 782 {
 783         struct nfsclclient *clp;
 784         struct nfsclclient *newclp = NULL;
 785         struct nfsmount *nmp;
 786         char uuid[HOSTUUIDLEN];
 787         int igotlock = 0, error, trystalecnt, clidinusedelay, i;
 788         u_int16_t idlen = 0;
 789
 790         nmp = VFSTONFS(mp);
 791         if (cred != NULL) {
 792                 getcredhostuuid(cred, uuid, sizeof uuid);
 793                 idlen = strlen(uuid);
 794                 if (idlen > 0)
 795                         idlen += sizeof (u_int64_t);
 796                 else
 797                         idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
 798                 newclp = malloc(
 799                     sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
 800                     M_WAITOK | M_ZERO);
 801         }
 802         NFSLOCKCLSTATE();
 803         /*
 804          * If a forced dismount is already in progress, don't
 805          * allocate a new clientid and get out now. For the case where
 806          * clp != NULL, this is a harmless optimization.
 807          */
 808         if (NFSCL_FORCEDISM(mp)) {
 809                 NFSUNLOCKCLSTATE();
 810                 if (newclp != NULL)
 811                         free(newclp, M_NFSCLCLIENT);
 812                 return (EBADF);
 813         }
 814         clp = nmp->nm_clp;
 815         if (clp == NULL) {
 816                 if (newclp == NULL) {
 817                         NFSUNLOCKCLSTATE();
 818                         return (EACCES);
 819                 }
 820                 clp = newclp;
 821                 clp->nfsc_idlen = idlen;
 822                 LIST_INIT(&clp->nfsc_owner);
 823                 TAILQ_INIT(&clp->nfsc_deleg);
 824                 TAILQ_INIT(&clp->nfsc_layout);
 825                 LIST_INIT(&clp->nfsc_devinfo);
 826                 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
 827                         LIST_INIT(&clp->nfsc_deleghash[i]);
 828                 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
 829                         LIST_INIT(&clp->nfsc_layouthash[i]);
 830                 clp->nfsc_flags = NFSCLFLAGS_INITED;
 831                 clp->nfsc_clientidrev = 1;
 832                 clp->nfsc_cbident = nfscl_nextcbident();
 833                 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
 834                     clp->nfsc_idlen);
 835                 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
 836                 nmp->nm_clp = clp;
 837                 clp->nfsc_nmp = nmp;
 838                 NFSUNLOCKCLSTATE();
 839                 if (start_renewthread != 0)
 840                         nfscl_start_renewthread(clp);
 841         } else {
 842                 NFSUNLOCKCLSTATE();
 843                 if (newclp != NULL)
 844                         free(newclp, M_NFSCLCLIENT);
 845         }
 846         NFSLOCKCLSTATE();
 847         while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
 848             !NFSCL_FORCEDISM(mp))
 849                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
 850                     NFSCLSTATEMUTEXPTR, mp);
 851         if (igotlock == 0) {
 852                 /*
 853                  * Call nfsv4_lock() with "iwantlock == 0" so that it will
 854                  * wait for a pending exclusive lock request.  This gives the
 855                  * exclusive lock request priority over this shared lock
 856                  * request.
 857                  * An exclusive lock on nfsc_lock is used mainly for server
 858                  * crash recoveries.
 859                  */
 860                 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp);
 861                 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
 862         }
 863         if (igotlock == 0 && NFSCL_FORCEDISM(mp)) {
 864                 /*
 865                  * Both nfsv4_lock() and nfsv4_getref() know to check
 866                  * for NFSCL_FORCEDISM() and return without sleeping to
 867                  * wait for the exclusive lock to be released, since it
 868                  * might be held by nfscl_umount() and we need to get out
 869                  * now for that case and not wait until nfscl_umount()
 870                  * releases it.
 871                  */
 872                 NFSUNLOCKCLSTATE();
 873                 return (EBADF);
 874         }
 875         NFSUNLOCKCLSTATE();
 876
 877         /*
 878          * If it needs a clientid, do the setclientid now.
 879          */
 880         if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
 881                 if (!igotlock)
 882                         panic("nfscl_clget");
 883                 if (p == NULL || cred == NULL) {
 884                         NFSLOCKCLSTATE();
 885                         nfsv4_unlock(&clp->nfsc_lock, 0);
 886                         NFSUNLOCKCLSTATE();
 887                         return (EACCES);
 888                 }
 889                 /*
 890                  * If RFC3530 Sec. 14.2.33 is taken literally,
 891                  * NFSERR_CLIDINUSE will be returned persistently for the
 892                  * case where a new mount of the same file system is using
 893                  * a different principal. In practice, NFSERR_CLIDINUSE is
 894                  * only returned when there is outstanding unexpired state
 895                  * on the clientid. As such, try for twice the lease
 896                  * interval, if we know what that is. Otherwise, make a
 897                  * wild ass guess.
 898                  * The case of returning NFSERR_STALECLIENTID is far less
 899                  * likely, but might occur if there is a significant delay
 900                  * between doing the SetClientID and SetClientIDConfirm Ops,
 901                  * such that the server throws away the clientid before
 902                  * receiving the SetClientIDConfirm.
 903                  */
 904                 if (clp->nfsc_renew > 0)
 905                         clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
 906                 else
 907                         clidinusedelay = 120;
 908                 trystalecnt = 3;
 909                 do {
 910                         error = nfsrpc_setclient(nmp, clp, 0, cred, p);
 911                         if (error == NFSERR_STALECLIENTID ||
 912                             error == NFSERR_STALEDONTRECOVER ||
 913                             error == NFSERR_BADSESSION ||
 914                             error == NFSERR_CLIDINUSE) {
 915                                 (void) nfs_catnap(PZERO, error, "nfs_setcl");
 916                         }
 917                 } while (((error == NFSERR_STALECLIENTID ||
 918                      error == NFSERR_BADSESSION ||
 919                      error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
 920                     (error == NFSERR_CLIDINUSE && --clidinusedelay > 0));
 921                 if (error) {
 922                         NFSLOCKCLSTATE();
 923                         nfsv4_unlock(&clp->nfsc_lock, 0);
 924                         NFSUNLOCKCLSTATE();
 925                         return (error);
 926                 }
 927                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
 928         }
 929         if (igotlock) {
 930                 NFSLOCKCLSTATE();
 931                 nfsv4_unlock(&clp->nfsc_lock, 1);
 932                 NFSUNLOCKCLSTATE();
 933         }
 934
 935         *clpp = clp;
 936         return (0);
 937 }
 938
 939 /*
 940  * Get a reference to a clientid and return it, if valid.
 941  */
 942 APPLESTATIC struct nfsclclient *
 943 nfscl_findcl(struct nfsmount *nmp)
 944 {
 945         struct nfsclclient *clp;
 946
 947         clp = nmp->nm_clp;
 948         if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
 949                 return (NULL);
 950         return (clp);
 951 }
 952
 953 /*
 954  * Release the clientid structure. It may be locked or reference counted.
 955  */
 956 static void
 957 nfscl_clrelease(struct nfsclclient *clp)
 958 {
 959
 960         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
 961                 nfsv4_unlock(&clp->nfsc_lock, 0);
 962         else
 963                 nfsv4_relref(&clp->nfsc_lock);
 964 }
 965
 966 /*
 967  * External call for nfscl_clrelease.
 968  */
 969 APPLESTATIC void
 970 nfscl_clientrelease(struct nfsclclient *clp)
 971 {
 972
 973         NFSLOCKCLSTATE();
 974         if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
 975                 nfsv4_unlock(&clp->nfsc_lock, 0);
 976         else
 977                 nfsv4_relref(&clp->nfsc_lock);
 978         NFSUNLOCKCLSTATE();
 979 }
 980
 981 /*
 982  * Called when wanting to lock a byte region.
 983  */
 984 APPLESTATIC int
 985 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
 986     short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
 987     int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
 988     struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
 989 {
 990         struct nfscllockowner *lp;
 991         struct nfsclopen *op;
 992         struct nfsclclient *clp;
 993         struct nfscllockowner *nlp;
 994         struct nfscllock *nlop, *otherlop;
 995         struct nfscldeleg *dp = NULL, *ldp = NULL;
 996         struct nfscllockownerhead *lhp = NULL;
 997         struct nfsnode *np;
 998         u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
 999         u_int8_t *openownp;
1000         int error = 0, ret, donelocally = 0;
1001         u_int32_t mode;
1002
1003         /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
1004         mode = 0;
1005         np = VTONFS(vp);
1006         *lpp = NULL;
1007         lp = NULL;
1008         *newonep = 0;
1009         *donelocallyp = 0;
1010
1011         /*
1012          * Might need these, so MALLOC them now, to
1013          * avoid a tsleep() in MALLOC later.
1014          */
1015         nlp = malloc(
1016             sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
1017         otherlop = malloc(
1018             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1019         nlop = malloc(
1020             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1021         nlop->nfslo_type = type;
1022         nlop->nfslo_first = off;
1023         if (len == NFS64BITSSET) {
1024                 nlop->nfslo_end = NFS64BITSSET;
1025         } else {
1026                 nlop->nfslo_end = off + len;
1027                 if (nlop->nfslo_end <= nlop->nfslo_first)
1028                         error = NFSERR_INVAL;
1029         }
1030
1031         if (!error) {
1032                 if (recovery)
1033                         clp = rclp;
1034                 else
1035                         error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
1036         }
1037         if (error) {
1038                 free(nlp, M_NFSCLLOCKOWNER);
1039                 free(otherlop, M_NFSCLLOCK);
1040                 free(nlop, M_NFSCLLOCK);
1041                 return (error);
1042         }
1043
1044         op = NULL;
1045         if (recovery) {
1046                 ownp = rownp;
1047                 openownp = ropenownp;
1048         } else {
1049                 nfscl_filllockowner(id, own, flags);
1050                 ownp = own;
1051                 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp))))
1052                         nfscl_filllockowner(NULL, openown, F_POSIX);
1053                 else
1054                         nfscl_filllockowner(p->td_proc, openown, F_POSIX);
1055                 openownp = openown;
1056         }
1057         if (!recovery) {
1058                 NFSLOCKCLSTATE();
1059                 /*
1060                  * First, search for a delegation. If one exists for this file,
1061                  * the lock can be done locally against it, so long as there
1062                  * isn't a local lock conflict.
1063                  */
1064                 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1065                     np->n_fhp->nfh_len);
1066                 /* Just sanity check for correct type of delegation */
1067                 if (dp != NULL && ((dp->nfsdl_flags &
1068                     (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
1069                      (type == F_WRLCK &&
1070                       (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
1071                         dp = NULL;
1072         }
1073         if (dp != NULL) {
1074                 /* Now, find an open and maybe a lockowner. */
1075                 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh,
1076                     np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
1077                 if (ret)
1078                         ret = nfscl_getopen(&clp->nfsc_owner,
1079                             np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1080                             ownp, mode, NULL, &op);
1081                 if (!ret) {
1082                         lhp = &dp->nfsdl_lock;
1083                         TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
1084                         TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
1085                         dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
1086                         donelocally = 1;
1087                 } else {
1088                         dp = NULL;
1089                 }
1090         }
1091         if (!donelocally) {
1092                 /*
1093                  * Get the related Open and maybe lockowner.
1094                  */
1095                 error = nfscl_getopen(&clp->nfsc_owner,
1096                     np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1097                     ownp, mode, &lp, &op);
1098                 if (!error)
1099                         lhp = &op->nfso_lock;
1100         }
1101         if (!error && !recovery)
1102                 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1103                     np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1104         if (error) {
1105                 if (!recovery) {
1106                         nfscl_clrelease(clp);
1107                         NFSUNLOCKCLSTATE();
1108                 }
1109                 free(nlp, M_NFSCLLOCKOWNER);
1110                 free(otherlop, M_NFSCLLOCK);
1111                 free(nlop, M_NFSCLLOCK);
1112                 return (error);
1113         }
1114
1115         /*
1116          * Ok, see if a lockowner exists and create one, as required.
1117          */
1118         if (lp == NULL)
1119                 LIST_FOREACH(lp, lhp, nfsl_list) {
1120                         if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1121                                 break;
1122                 }
1123         if (lp == NULL) {
1124                 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1125                 if (recovery)
1126                         NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1127                             NFSV4CL_LOCKNAMELEN);
1128                 else
1129                         NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1130                             NFSV4CL_LOCKNAMELEN);
1131                 nlp->nfsl_seqid = 0;
1132                 nlp->nfsl_lockflags = flags;
1133                 nlp->nfsl_inprog = NULL;
1134                 nfscl_lockinit(&nlp->nfsl_rwlock);
1135                 LIST_INIT(&nlp->nfsl_lock);
1136                 if (donelocally) {
1137                         nlp->nfsl_open = NULL;
1138                         nfsstatsv1.cllocallockowners++;
1139                 } else {
1140                         nlp->nfsl_open = op;
1141                         nfsstatsv1.cllockowners++;
1142                 }
1143                 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1144                 lp = nlp;
1145                 nlp = NULL;
1146                 *newonep = 1;
1147         }
1148
1149         /*
1150          * Now, update the byte ranges for locks.
1151          */
1152         ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1153         if (!ret)
1154                 donelocally = 1;
1155         if (donelocally) {
1156                 *donelocallyp = 1;
1157                 if (!recovery)
1158                         nfscl_clrelease(clp);
1159         } else {
1160                 /*
1161                  * Serial modifications on the lock owner for multiple threads
1162                  * for the same process using a read/write lock.
1163                  */
1164                 if (!recovery)
1165                         nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1166         }
1167         if (!recovery)
1168                 NFSUNLOCKCLSTATE();
1169
1170         if (nlp)
1171                 free(nlp, M_NFSCLLOCKOWNER);
1172         if (nlop)
1173                 free(nlop, M_NFSCLLOCK);
1174         if (otherlop)
1175                 free(otherlop, M_NFSCLLOCK);
1176
1177         *lpp = lp;
1178         return (0);
1179 }
1180
1181 /*
1182  * Called to unlock a byte range, for LockU.
1183  */
1184 APPLESTATIC int
1185 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1186     __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1187     struct nfsclclient *clp, void *id, int flags,
1188     struct nfscllockowner **lpp, int *dorpcp)
1189 {
1190         struct nfscllockowner *lp;
1191         struct nfsclowner *owp;
1192         struct nfsclopen *op;
1193         struct nfscllock *nlop, *other_lop = NULL;
1194         struct nfscldeleg *dp;
1195         struct nfsnode *np;
1196         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1197         int ret = 0, fnd;
1198
1199         np = VTONFS(vp);
1200         *lpp = NULL;
1201         *dorpcp = 0;
1202
1203         /*
1204          * Might need these, so MALLOC them now, to
1205          * avoid a tsleep() in MALLOC later.
1206          */
1207         nlop = malloc(
1208             sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1209         nlop->nfslo_type = F_UNLCK;
1210         nlop->nfslo_first = off;
1211         if (len == NFS64BITSSET) {
1212                 nlop->nfslo_end = NFS64BITSSET;
1213         } else {
1214                 nlop->nfslo_end = off + len;
1215                 if (nlop->nfslo_end <= nlop->nfslo_first) {
1216                         free(nlop, M_NFSCLLOCK);
1217                         return (NFSERR_INVAL);
1218                 }
1219         }
1220         if (callcnt == 0) {
1221                 other_lop = malloc(
1222                     sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1223                 *other_lop = *nlop;
1224         }
1225         nfscl_filllockowner(id, own, flags);
1226         dp = NULL;
1227         NFSLOCKCLSTATE();
1228         if (callcnt == 0)
1229                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1230                     np->n_fhp->nfh_len);
1231
1232         /*
1233          * First, unlock any local regions on a delegation.
1234          */
1235         if (dp != NULL) {
1236                 /* Look for this lockowner. */
1237                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1238                         if (!NFSBCMP(lp->nfsl_owner, own,
1239                             NFSV4CL_LOCKNAMELEN))
1240                                 break;
1241                 }
1242                 if (lp != NULL)
1243                         /* Use other_lop, so nlop is still available */
1244                         (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1245         }
1246
1247         /*
1248          * Now, find a matching open/lockowner that hasn't already been done,
1249          * as marked by nfsl_inprog.
1250          */
1251         lp = NULL;
1252         fnd = 0;
1253         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1254             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1255                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1256                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1257                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1258                         if (lp->nfsl_inprog == NULL &&
1259                             !NFSBCMP(lp->nfsl_owner, own,
1260                              NFSV4CL_LOCKNAMELEN)) {
1261                                 fnd = 1;
1262                                 break;
1263                         }
1264                     }
1265                     if (fnd)
1266                         break;
1267                 }
1268             }
1269             if (fnd)
1270                 break;
1271         }
1272
1273         if (lp != NULL) {
1274                 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1275                 if (ret)
1276                         *dorpcp = 1;
1277                 /*
1278                  * Serial modifications on the lock owner for multiple
1279                  * threads for the same process using a read/write lock.
1280                  */
1281                 lp->nfsl_inprog = p;
1282                 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1283                 *lpp = lp;
1284         }
1285         NFSUNLOCKCLSTATE();
1286         if (nlop)
1287                 free(nlop, M_NFSCLLOCK);
1288         if (other_lop)
1289                 free(other_lop, M_NFSCLLOCK);
1290         return (0);
1291 }
1292
1293 /*
1294  * Release all lockowners marked in progess for this process and file.
1295  */
1296 APPLESTATIC void
1297 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1298     void *id, int flags)
1299 {
1300         struct nfsclowner *owp;
1301         struct nfsclopen *op;
1302         struct nfscllockowner *lp;
1303         struct nfsnode *np;
1304         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1305
1306         np = VTONFS(vp);
1307         nfscl_filllockowner(id, own, flags);
1308         NFSLOCKCLSTATE();
1309         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1310             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1311                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1312                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1313                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1314                         if (lp->nfsl_inprog == p &&
1315                             !NFSBCMP(lp->nfsl_owner, own,
1316                             NFSV4CL_LOCKNAMELEN)) {
1317                             lp->nfsl_inprog = NULL;
1318                             nfscl_lockunlock(&lp->nfsl_rwlock);
1319                         }
1320                     }
1321                 }
1322             }
1323         }
1324         nfscl_clrelease(clp);
1325         NFSUNLOCKCLSTATE();
1326 }
1327
1328 /*
1329  * Called to find out if any bytes within the byte range specified are
1330  * write locked by the calling process. Used to determine if flushing
1331  * is required before a LockU.
1332  * If in doubt, return 1, so the flush will occur.
1333  */
1334 APPLESTATIC int
1335 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1336     struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1337 {
1338         struct nfsclowner *owp;
1339         struct nfscllockowner *lp;
1340         struct nfsclopen *op;
1341         struct nfsclclient *clp;
1342         struct nfscllock *lop;
1343         struct nfscldeleg *dp;
1344         struct nfsnode *np;
1345         u_int64_t off, end;
1346         u_int8_t own[NFSV4CL_LOCKNAMELEN];
1347         int error = 0;
1348
1349         np = VTONFS(vp);
1350         switch (fl->l_whence) {
1351         case SEEK_SET:
1352         case SEEK_CUR:
1353                 /*
1354                  * Caller is responsible for adding any necessary offset
1355                  * when SEEK_CUR is used.
1356                  */
1357                 off = fl->l_start;
1358                 break;
1359         case SEEK_END:
1360                 off = np->n_size + fl->l_start;
1361                 break;
1362         default:
1363                 return (1);
1364         }
1365         if (fl->l_len != 0) {
1366                 end = off + fl->l_len;
1367                 if (end < off)
1368                         return (1);
1369         } else {
1370                 end = NFS64BITSSET;
1371         }
1372
1373         error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp);
1374         if (error)
1375                 return (1);
1376         nfscl_filllockowner(id, own, flags);
1377         NFSLOCKCLSTATE();
1378
1379         /*
1380          * First check the delegation locks.
1381          */
1382         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1383         if (dp != NULL) {
1384                 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1385                         if (!NFSBCMP(lp->nfsl_owner, own,
1386                             NFSV4CL_LOCKNAMELEN))
1387                                 break;
1388                 }
1389                 if (lp != NULL) {
1390                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1391                                 if (lop->nfslo_first >= end)
1392                                         break;
1393                                 if (lop->nfslo_end <= off)
1394                                         continue;
1395                                 if (lop->nfslo_type == F_WRLCK) {
1396                                         nfscl_clrelease(clp);
1397                                         NFSUNLOCKCLSTATE();
1398                                         return (1);
1399                                 }
1400                         }
1401                 }
1402         }
1403
1404         /*
1405          * Now, check state against the server.
1406          */
1407         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1408             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1409                 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1410                     !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1411                     LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1412                         if (!NFSBCMP(lp->nfsl_owner, own,
1413                             NFSV4CL_LOCKNAMELEN))
1414                             break;
1415                     }
1416                     if (lp != NULL) {
1417                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1418                             if (lop->nfslo_first >= end)
1419                                 break;
1420                             if (lop->nfslo_end <= off)
1421                                 continue;
1422                             if (lop->nfslo_type == F_WRLCK) {
1423                                 nfscl_clrelease(clp);
1424                                 NFSUNLOCKCLSTATE();
1425                                 return (1);
1426                             }
1427                         }
1428                     }
1429                 }
1430             }
1431         }
1432         nfscl_clrelease(clp);
1433         NFSUNLOCKCLSTATE();
1434         return (0);
1435 }
1436
1437 /*
1438  * Release a byte range lock owner structure.
1439  */
1440 APPLESTATIC void
1441 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1442 {
1443         struct nfsclclient *clp;
1444
1445         if (lp == NULL)
1446                 return;
1447         NFSLOCKCLSTATE();
1448         clp = lp->nfsl_open->nfso_own->nfsow_clp;
1449         if (error != 0 && candelete &&
1450             (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1451                 nfscl_freelockowner(lp, 0);
1452         else
1453                 nfscl_lockunlock(&lp->nfsl_rwlock);
1454         nfscl_clrelease(clp);
1455         NFSUNLOCKCLSTATE();
1456 }
1457
1458 /*
1459  * Free up an open structure and any associated byte range lock structures.
1460  */
1461 APPLESTATIC void
1462 nfscl_freeopen(struct nfsclopen *op, int local)
1463 {
1464
1465         LIST_REMOVE(op, nfso_list);
1466         nfscl_freealllocks(&op->nfso_lock, local);
1467         free(op, M_NFSCLOPEN);
1468         if (local)
1469                 nfsstatsv1.cllocalopens--;
1470         else
1471                 nfsstatsv1.clopens--;
1472 }
1473
1474 /*
1475  * Free up all lock owners and associated locks.
1476  */
1477 static void
1478 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1479 {
1480         struct nfscllockowner *lp, *nlp;
1481
1482         LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1483                 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1484                         panic("nfscllckw");
1485                 nfscl_freelockowner(lp, local);
1486         }
1487 }
1488
1489 /*
1490  * Called for an Open when NFSERR_EXPIRED is received from the server.
1491  * If there are no byte range locks nor a Share Deny lost, try to do a
1492  * fresh Open. Otherwise, free the open.
1493  */
1494 static int
1495 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1496     struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1497 {
1498         struct nfscllockowner *lp;
1499         struct nfscldeleg *dp;
1500         int mustdelete = 0, error;
1501
1502         /*
1503          * Look for any byte range lock(s).
1504          */
1505         LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1506                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1507                         mustdelete = 1;
1508                         break;
1509                 }
1510         }
1511
1512         /*
1513          * If no byte range lock(s) nor a Share deny, try to re-open.
1514          */
1515         if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1516                 newnfs_copycred(&op->nfso_cred, cred);
1517                 dp = NULL;
1518                 error = nfsrpc_reopen(nmp, op->nfso_fh,
1519                     op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1520                 if (error) {
1521                         mustdelete = 1;
1522                         if (dp != NULL) {
1523                                 free(dp, M_NFSCLDELEG);
1524                                 dp = NULL;
1525                         }
1526                 }
1527                 if (dp != NULL)
1528                         nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1529                             op->nfso_fhlen, cred, p, &dp);
1530         }
1531
1532         /*
1533          * If a byte range lock or Share deny or couldn't re-open, free it.
1534          */
1535         if (mustdelete)
1536                 nfscl_freeopen(op, 0);
1537         return (mustdelete);
1538 }
1539
1540 /*
1541  * Free up an open owner structure.
1542  */
1543 static void
1544 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1545 {
1546
1547         LIST_REMOVE(owp, nfsow_list);
1548         free(owp, M_NFSCLOWNER);
1549         if (local)
1550                 nfsstatsv1.cllocalopenowners--;
1551         else
1552                 nfsstatsv1.clopenowners--;
1553 }
1554
1555 /*
1556  * Free up a byte range lock owner structure.
1557  */
1558 APPLESTATIC void
1559 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1560 {
1561         struct nfscllock *lop, *nlop;
1562
1563         LIST_REMOVE(lp, nfsl_list);
1564         LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1565                 nfscl_freelock(lop, local);
1566         }
1567         free(lp, M_NFSCLLOCKOWNER);
1568         if (local)
1569                 nfsstatsv1.cllocallockowners--;
1570         else
1571                 nfsstatsv1.cllockowners--;
1572 }
1573
1574 /*
1575  * Free up a byte range lock structure.
1576  */
1577 APPLESTATIC void
1578 nfscl_freelock(struct nfscllock *lop, int local)
1579 {
1580
1581         LIST_REMOVE(lop, nfslo_list);
1582         free(lop, M_NFSCLLOCK);
1583         if (local)
1584                 nfsstatsv1.cllocallocks--;
1585         else
1586                 nfsstatsv1.cllocks--;
1587 }
1588
1589 /*
1590  * Clean out the state related to a delegation.
1591  */
1592 static void
1593 nfscl_cleandeleg(struct nfscldeleg *dp)
1594 {
1595         struct nfsclowner *owp, *nowp;
1596         struct nfsclopen *op;
1597
1598         LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1599                 op = LIST_FIRST(&owp->nfsow_open);
1600                 if (op != NULL) {
1601                         if (LIST_NEXT(op, nfso_list) != NULL)
1602                                 panic("nfscleandel");
1603                         nfscl_freeopen(op, 1);
1604                 }
1605                 nfscl_freeopenowner(owp, 1);
1606         }
1607         nfscl_freealllocks(&dp->nfsdl_lock, 1);
1608 }
1609
1610 /*
1611  * Free a delegation.
1612  */
1613 static void
1614 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp)
1615 {
1616
1617         TAILQ_REMOVE(hdp, dp, nfsdl_list);
1618         LIST_REMOVE(dp, nfsdl_hash);
1619         free(dp, M_NFSCLDELEG);
1620         nfsstatsv1.cldelegates--;
1621         nfscl_delegcnt--;
1622 }
1623
1624 /*
1625  * Free up all state related to this client structure.
1626  */
1627 static void
1628 nfscl_cleanclient(struct nfsclclient *clp)
1629 {
1630         struct nfsclowner *owp, *nowp;
1631         struct nfsclopen *op, *nop;
1632         struct nfscllayout *lyp, *nlyp;
1633         struct nfscldevinfo *dip, *ndip;
1634
1635         TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
1636                 nfscl_freelayout(lyp);
1637
1638         LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip)
1639                 nfscl_freedevinfo(dip);
1640
1641         /* Now, all the OpenOwners, etc. */
1642         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1643                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1644                         nfscl_freeopen(op, 0);
1645                 }
1646                 nfscl_freeopenowner(owp, 0);
1647         }
1648 }
1649
1650 /*
1651  * Called when an NFSERR_EXPIRED is received from the server.
1652  */
1653 static void
1654 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1655     struct ucred *cred, NFSPROC_T *p)
1656 {
1657         struct nfsclowner *owp, *nowp, *towp;
1658         struct nfsclopen *op, *nop, *top;
1659         struct nfscldeleg *dp, *ndp;
1660         int ret, printed = 0;
1661
1662         /*
1663          * First, merge locally issued Opens into the list for the server.
1664          */
1665         dp = TAILQ_FIRST(&clp->nfsc_deleg);
1666         while (dp != NULL) {
1667             ndp = TAILQ_NEXT(dp, nfsdl_list);
1668             owp = LIST_FIRST(&dp->nfsdl_owner);
1669             while (owp != NULL) {
1670                 nowp = LIST_NEXT(owp, nfsow_list);
1671                 op = LIST_FIRST(&owp->nfsow_open);
1672                 if (op != NULL) {
1673                     if (LIST_NEXT(op, nfso_list) != NULL)
1674                         panic("nfsclexp");
1675                     LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1676                         if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1677                             NFSV4CL_LOCKNAMELEN))
1678                             break;
1679                     }
1680                     if (towp != NULL) {
1681                         /* Merge opens in */
1682                         LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1683                             if (top->nfso_fhlen == op->nfso_fhlen &&
1684                                 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1685                                  op->nfso_fhlen)) {
1686                                 top->nfso_mode |= op->nfso_mode;
1687                                 top->nfso_opencnt += op->nfso_opencnt;
1688                                 break;
1689                             }
1690                         }
1691                         if (top == NULL) {
1692                             /* Just add the open to the owner list */
1693                             LIST_REMOVE(op, nfso_list);
1694                             op->nfso_own = towp;
1695                             LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1696                             nfsstatsv1.cllocalopens--;
1697                             nfsstatsv1.clopens++;
1698                         }
1699                     } else {
1700                         /* Just add the openowner to the client list */
1701                         LIST_REMOVE(owp, nfsow_list);
1702                         owp->nfsow_clp = clp;
1703                         LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1704                         nfsstatsv1.cllocalopenowners--;
1705                         nfsstatsv1.clopenowners++;
1706                         nfsstatsv1.cllocalopens--;
1707                         nfsstatsv1.clopens++;
1708                     }
1709                 }
1710                 owp = nowp;
1711             }
1712             if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1713                 printed = 1;
1714                 printf("nfsv4 expired locks lost\n");
1715             }
1716             nfscl_cleandeleg(dp);
1717             nfscl_freedeleg(&clp->nfsc_deleg, dp);
1718             dp = ndp;
1719         }
1720         if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1721             panic("nfsclexp");
1722
1723         /*
1724          * Now, try and reopen against the server.
1725          */
1726         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1727                 owp->nfsow_seqid = 0;
1728                 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1729                         ret = nfscl_expireopen(clp, op, nmp, cred, p);
1730                         if (ret && !printed) {
1731                                 printed = 1;
1732                                 printf("nfsv4 expired locks lost\n");
1733                         }
1734                 }
1735                 if (LIST_EMPTY(&owp->nfsow_open))
1736                         nfscl_freeopenowner(owp, 0);
1737         }
1738 }
1739
1740 /*
1741  * This function must be called after the process represented by "own" has
1742  * exited. Must be called with CLSTATE lock held.
1743  */
1744 static void
1745 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1746 {
1747         struct nfsclowner *owp, *nowp;
1748         struct nfscllockowner *lp, *nlp;
1749         struct nfscldeleg *dp;
1750
1751         /* First, get rid of local locks on delegations. */
1752         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1753                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1754                     if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1755                         if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1756                             panic("nfscllckw");
1757                         nfscl_freelockowner(lp, 1);
1758                     }
1759                 }
1760         }
1761         owp = LIST_FIRST(&clp->nfsc_owner);
1762         while (owp != NULL) {
1763                 nowp = LIST_NEXT(owp, nfsow_list);
1764                 if (!NFSBCMP(owp->nfsow_owner, own,
1765                     NFSV4CL_LOCKNAMELEN)) {
1766                         /*
1767                          * If there are children that haven't closed the
1768                          * file descriptors yet, the opens will still be
1769                          * here. For that case, let the renew thread clear
1770                          * out the OpenOwner later.
1771                          */
1772                         if (LIST_EMPTY(&owp->nfsow_open))
1773                                 nfscl_freeopenowner(owp, 0);
1774                         else
1775                                 owp->nfsow_defunct = 1;
1776                 }
1777                 owp = nowp;
1778         }
1779 }
1780
1781 /*
1782  * Find open/lock owners for processes that have exited.
1783  */
1784 static void
1785 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1786 {
1787         struct nfsclowner *owp, *nowp;
1788         struct nfsclopen *op;
1789         struct nfscllockowner *lp, *nlp;
1790         struct nfscldeleg *dp;
1791
1792         NFSPROCLISTLOCK();
1793         NFSLOCKCLSTATE();
1794         LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1795                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1796                         LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1797                                 if (LIST_EMPTY(&lp->nfsl_lock))
1798                                         nfscl_emptylockowner(lp, lhp);
1799                         }
1800                 }
1801                 if (nfscl_procdoesntexist(owp->nfsow_owner))
1802                         nfscl_cleanup_common(clp, owp->nfsow_owner);
1803         }
1804
1805         /*
1806          * For the single open_owner case, these lock owners need to be
1807          * checked to see if they still exist separately.
1808          * This is because nfscl_procdoesntexist() never returns true for
1809          * the single open_owner so that the above doesn't ever call
1810          * nfscl_cleanup_common().
1811          */
1812         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1813                 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1814                         if (nfscl_procdoesntexist(lp->nfsl_owner))
1815                                 nfscl_cleanup_common(clp, lp->nfsl_owner);
1816                 }
1817         }
1818         NFSUNLOCKCLSTATE();
1819         NFSPROCLISTUNLOCK();
1820 }
1821
1822 /*
1823  * Take the empty lock owner and move it to the local lhp list if the
1824  * associated process no longer exists.
1825  */
1826 static void
1827 nfscl_emptylockowner(struct nfscllockowner *lp,
1828     struct nfscllockownerfhhead *lhp)
1829 {
1830         struct nfscllockownerfh *lfhp, *mylfhp;
1831         struct nfscllockowner *nlp;
1832         int fnd_it;
1833
1834         /* If not a Posix lock owner, just return. */
1835         if ((lp->nfsl_lockflags & F_POSIX) == 0)
1836                 return;
1837
1838         fnd_it = 0;
1839         mylfhp = NULL;
1840         /*
1841          * First, search to see if this lock owner is already in the list.
1842          * If it is, then the associated process no longer exists.
1843          */
1844         SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
1845                 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
1846                     !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
1847                     lfhp->nfslfh_len))
1848                         mylfhp = lfhp;
1849                 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
1850                         if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
1851                             NFSV4CL_LOCKNAMELEN))
1852                                 fnd_it = 1;
1853         }
1854         /* If not found, check if process still exists. */
1855         if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
1856                 return;
1857
1858         /* Move the lock owner over to the local list. */
1859         if (mylfhp == NULL) {
1860                 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
1861                     M_NOWAIT);
1862                 if (mylfhp == NULL)
1863                         return;
1864                 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
1865                 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
1866                     mylfhp->nfslfh_len);
1867                 LIST_INIT(&mylfhp->nfslfh_lock);
1868                 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
1869         }
1870         LIST_REMOVE(lp, nfsl_list);
1871         LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
1872 }
1873
1874 static int      fake_global;    /* Used to force visibility of MNTK_UNMOUNTF */
1875 /*
1876  * Called from nfs umount to free up the clientid.
1877  */
1878 APPLESTATIC void
1879 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
1880 {
1881         struct nfsclclient *clp;
1882         struct ucred *cred;
1883         int igotlock;
1884
1885         /*
1886          * For the case that matters, this is the thread that set
1887          * MNTK_UNMOUNTF, so it will see it set. The code that follows is
1888          * done to ensure that any thread executing nfscl_getcl() after
1889          * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
1890          * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
1891          * explanation, courtesy of Alan Cox.
1892          * What follows is a snippet from Alan Cox's email at:
1893          * http://docs.FreeBSD.org/cgi/
1894          *     mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
1895          *
1896          * 1. Set MNTK_UNMOUNTF
1897          * 2. Acquire a standard FreeBSD mutex "m".
1898          * 3. Update some data structures.
1899          * 4. Release mutex "m".
1900          *
1901          * Then, other threads that acquire "m" after step 4 has occurred will
1902          * see MNTK_UNMOUNTF as set.  But, other threads that beat thread X to
1903          * step 2 may or may not see MNTK_UNMOUNTF as set.
1904          */
1905         NFSLOCKCLSTATE();
1906         if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
1907                 fake_global++;
1908                 NFSUNLOCKCLSTATE();
1909                 NFSLOCKCLSTATE();
1910         }
1911
1912         clp = nmp->nm_clp;
1913         if (clp != NULL) {
1914                 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
1915                         panic("nfscl umount");
1916
1917                 /*
1918                  * First, handshake with the nfscl renew thread, to terminate
1919                  * it.
1920                  */
1921                 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
1922                 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
1923                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
1924                             "nfsclumnt", hz);
1925
1926                 /*
1927                  * Now, get the exclusive lock on the client state, so
1928                  * that no uses of the state are still in progress.
1929                  */
1930                 do {
1931                         igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1932                             NFSCLSTATEMUTEXPTR, NULL);
1933                 } while (!igotlock);
1934                 NFSUNLOCKCLSTATE();
1935
1936                 /*
1937                  * Free up all the state. It will expire on the server, but
1938                  * maybe we should do a SetClientId/SetClientIdConfirm so
1939                  * the server throws it away?
1940                  */
1941                 LIST_REMOVE(clp, nfsc_list);
1942                 nfscl_delegreturnall(clp, p);
1943                 cred = newnfs_getcred();
1944                 if (NFSHASNFSV4N(nmp)) {
1945                         (void)nfsrpc_destroysession(nmp, clp, cred, p);
1946                         (void)nfsrpc_destroyclient(nmp, clp, cred, p);
1947                 } else
1948                         (void)nfsrpc_setclient(nmp, clp, 0, cred, p);
1949                 nfscl_cleanclient(clp);
1950                 nmp->nm_clp = NULL;
1951                 NFSFREECRED(cred);
1952                 free(clp, M_NFSCLCLIENT);
1953         } else
1954                 NFSUNLOCKCLSTATE();
1955 }
1956
1957 /*
1958  * This function is called when a server replies with NFSERR_STALECLIENTID
1959  * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
1960  * doing Opens and Locks with reclaim. If these fail, it deletes the
1961  * corresponding state.
1962  */
1963 static void
1964 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
1965 {
1966         struct nfsclowner *owp, *nowp;
1967         struct nfsclopen *op, *nop;
1968         struct nfscllockowner *lp, *nlp;
1969         struct nfscllock *lop, *nlop;
1970         struct nfscldeleg *dp, *ndp, *tdp;
1971         struct nfsmount *nmp;
1972         struct ucred *tcred;
1973         struct nfsclopenhead extra_open;
1974         struct nfscldeleghead extra_deleg;
1975         struct nfsreq *rep;
1976         u_int64_t len;
1977         u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
1978         int i, igotlock = 0, error, trycnt, firstlock;
1979         struct nfscllayout *lyp, *nlyp;
1980
1981         /*
1982          * First, lock the client structure, so everyone else will
1983          * block when trying to use state.
1984          */
1985         NFSLOCKCLSTATE();
1986         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
1987         do {
1988                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1989                     NFSCLSTATEMUTEXPTR, NULL);
1990         } while (!igotlock);
1991         NFSUNLOCKCLSTATE();
1992
1993         nmp = clp->nfsc_nmp;
1994         if (nmp == NULL)
1995                 panic("nfscl recover");
1996
1997         /*
1998          * For now, just get rid of all layouts. There may be a need
1999          * to do LayoutCommit Ops with reclaim == true later.
2000          */
2001         TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
2002                 nfscl_freelayout(lyp);
2003         TAILQ_INIT(&clp->nfsc_layout);
2004         for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
2005                 LIST_INIT(&clp->nfsc_layouthash[i]);
2006
2007         trycnt = 5;
2008         do {
2009                 error = nfsrpc_setclient(nmp, clp, 1, cred, p);
2010         } while ((error == NFSERR_STALECLIENTID ||
2011              error == NFSERR_BADSESSION ||
2012              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2013         if (error) {
2014                 NFSLOCKCLSTATE();
2015                 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
2016                     NFSCLFLAGS_RECVRINPROG);
2017                 wakeup(&clp->nfsc_flags);
2018                 nfsv4_unlock(&clp->nfsc_lock, 0);
2019                 NFSUNLOCKCLSTATE();
2020                 return;
2021         }
2022         clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2023         clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2024
2025         /*
2026          * Mark requests already queued on the server, so that they don't
2027          * initiate another recovery cycle. Any requests already in the
2028          * queue that handle state information will have the old stale
2029          * clientid/stateid and will get a NFSERR_STALESTATEID,
2030          * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
2031          * This will be translated to NFSERR_STALEDONTRECOVER when
2032          * R_DONTRECOVER is set.
2033          */
2034         NFSLOCKREQ();
2035         TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
2036                 if (rep->r_nmp == nmp)
2037                         rep->r_flags |= R_DONTRECOVER;
2038         }
2039         NFSUNLOCKREQ();
2040
2041         /*
2042          * Now, mark all delegations "need reclaim".
2043          */
2044         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
2045                 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
2046
2047         TAILQ_INIT(&extra_deleg);
2048         LIST_INIT(&extra_open);
2049         /*
2050          * Now traverse the state lists, doing Open and Lock Reclaims.
2051          */
2052         tcred = newnfs_getcred();
2053         owp = LIST_FIRST(&clp->nfsc_owner);
2054         while (owp != NULL) {
2055             nowp = LIST_NEXT(owp, nfsow_list);
2056             owp->nfsow_seqid = 0;
2057             op = LIST_FIRST(&owp->nfsow_open);
2058             while (op != NULL) {
2059                 nop = LIST_NEXT(op, nfso_list);
2060                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2061                     /* Search for a delegation to reclaim with the open */
2062                     TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2063                         if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2064                             continue;
2065                         if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2066                             mode = NFSV4OPEN_ACCESSWRITE;
2067                             delegtype = NFSV4OPEN_DELEGATEWRITE;
2068                         } else {
2069                             mode = NFSV4OPEN_ACCESSREAD;
2070                             delegtype = NFSV4OPEN_DELEGATEREAD;
2071                         }
2072                         if ((op->nfso_mode & mode) == mode &&
2073                             op->nfso_fhlen == dp->nfsdl_fhlen &&
2074                             !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
2075                             break;
2076                     }
2077                     ndp = dp;
2078                     if (dp == NULL)
2079                         delegtype = NFSV4OPEN_DELEGATENONE;
2080                     newnfs_copycred(&op->nfso_cred, tcred);
2081                     error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
2082                         op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
2083                         op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
2084                         tcred, p);
2085                     if (!error) {
2086                         /* Handle any replied delegation */
2087                         if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
2088                             || NFSMNT_RDONLY(nmp->nm_mountp))) {
2089                             if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
2090                                 mode = NFSV4OPEN_ACCESSWRITE;
2091                             else
2092                                 mode = NFSV4OPEN_ACCESSREAD;
2093                             TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2094                                 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
2095                                     continue;
2096                                 if ((op->nfso_mode & mode) == mode &&
2097                                     op->nfso_fhlen == dp->nfsdl_fhlen &&
2098                                     !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
2099                                     op->nfso_fhlen)) {
2100                                     dp->nfsdl_stateid = ndp->nfsdl_stateid;
2101                                     dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
2102                                     dp->nfsdl_ace = ndp->nfsdl_ace;
2103                                     dp->nfsdl_change = ndp->nfsdl_change;
2104                                     dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2105                                     if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
2106                                         dp->nfsdl_flags |= NFSCLDL_RECALL;
2107                                     free(ndp, M_NFSCLDELEG);
2108                                     ndp = NULL;
2109                                     break;
2110                                 }
2111                             }
2112                         }
2113                         if (ndp != NULL)
2114                             TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
2115
2116                         /* and reclaim all byte range locks */
2117                         lp = LIST_FIRST(&op->nfso_lock);
2118                         while (lp != NULL) {
2119                             nlp = LIST_NEXT(lp, nfsl_list);
2120                             lp->nfsl_seqid = 0;
2121                             firstlock = 1;
2122                             lop = LIST_FIRST(&lp->nfsl_lock);
2123                             while (lop != NULL) {
2124                                 nlop = LIST_NEXT(lop, nfslo_list);
2125                                 if (lop->nfslo_end == NFS64BITSSET)
2126                                     len = NFS64BITSSET;
2127                                 else
2128                                     len = lop->nfslo_end - lop->nfslo_first;
2129                                 error = nfscl_trylock(nmp, NULL,
2130                                     op->nfso_fh, op->nfso_fhlen, lp,
2131                                     firstlock, 1, lop->nfslo_first, len,
2132                                     lop->nfslo_type, tcred, p);
2133                                 if (error != 0)
2134                                     nfscl_freelock(lop, 0);
2135                                 else
2136                                     firstlock = 0;
2137                                 lop = nlop;
2138                             }
2139                             /* If no locks, but a lockowner, just delete it. */
2140                             if (LIST_EMPTY(&lp->nfsl_lock))
2141                                 nfscl_freelockowner(lp, 0);
2142                             lp = nlp;
2143                         }
2144                     }
2145                 }
2146                 if (error != 0 && error != NFSERR_BADSESSION)
2147                     nfscl_freeopen(op, 0);
2148                 op = nop;
2149             }
2150             owp = nowp;
2151         }
2152
2153         /*
2154          * Now, try and get any delegations not yet reclaimed by cobbling
2155          * to-gether an appropriate open.
2156          */
2157         nowp = NULL;
2158         dp = TAILQ_FIRST(&clp->nfsc_deleg);
2159         while (dp != NULL) {
2160             ndp = TAILQ_NEXT(dp, nfsdl_list);
2161             if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2162                 if (nowp == NULL) {
2163                     nowp = malloc(
2164                         sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2165                     /*
2166                      * Name must be as long an largest possible
2167                      * NFSV4CL_LOCKNAMELEN. 12 for now.
2168                      */
2169                     NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2170                         NFSV4CL_LOCKNAMELEN);
2171                     LIST_INIT(&nowp->nfsow_open);
2172                     nowp->nfsow_clp = clp;
2173                     nowp->nfsow_seqid = 0;
2174                     nowp->nfsow_defunct = 0;
2175                     nfscl_lockinit(&nowp->nfsow_rwlock);
2176                 }
2177                 nop = NULL;
2178                 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
2179                     nop = malloc(sizeof (struct nfsclopen) +
2180                         dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2181                     nop->nfso_own = nowp;
2182                     if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2183                         nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2184                         delegtype = NFSV4OPEN_DELEGATEWRITE;
2185                     } else {
2186                         nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2187                         delegtype = NFSV4OPEN_DELEGATEREAD;
2188                     }
2189                     nop->nfso_opencnt = 0;
2190                     nop->nfso_posixlock = 1;
2191                     nop->nfso_fhlen = dp->nfsdl_fhlen;
2192                     NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2193                     LIST_INIT(&nop->nfso_lock);
2194                     nop->nfso_stateid.seqid = 0;
2195                     nop->nfso_stateid.other[0] = 0;
2196                     nop->nfso_stateid.other[1] = 0;
2197                     nop->nfso_stateid.other[2] = 0;
2198                     newnfs_copycred(&dp->nfsdl_cred, tcred);
2199                     newnfs_copyincred(tcred, &nop->nfso_cred);
2200                     tdp = NULL;
2201                     error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2202                         nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2203                         nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2204                         delegtype, tcred, p);
2205                     if (tdp != NULL) {
2206                         if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2207                             mode = NFSV4OPEN_ACCESSWRITE;
2208                         else
2209                             mode = NFSV4OPEN_ACCESSREAD;
2210                         if ((nop->nfso_mode & mode) == mode &&
2211                             nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2212                             !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2213                             nop->nfso_fhlen)) {
2214                             dp->nfsdl_stateid = tdp->nfsdl_stateid;
2215                             dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2216                             dp->nfsdl_ace = tdp->nfsdl_ace;
2217                             dp->nfsdl_change = tdp->nfsdl_change;
2218                             dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2219                             if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2220                                 dp->nfsdl_flags |= NFSCLDL_RECALL;
2221                             free(tdp, M_NFSCLDELEG);
2222                         } else {
2223                             TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2224                         }
2225                     }
2226                 }
2227                 if (error) {
2228                     if (nop != NULL)
2229                         free(nop, M_NFSCLOPEN);
2230                     /*
2231                      * Couldn't reclaim it, so throw the state
2232                      * away. Ouch!!
2233                      */
2234                     nfscl_cleandeleg(dp);
2235                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
2236                 } else {
2237                     LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2238                 }
2239             }
2240             dp = ndp;
2241         }
2242
2243         /*
2244          * Now, get rid of extra Opens and Delegations.
2245          */
2246         LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2247                 do {
2248                         newnfs_copycred(&op->nfso_cred, tcred);
2249                         error = nfscl_tryclose(op, tcred, nmp, p);
2250                         if (error == NFSERR_GRACE)
2251                                 (void) nfs_catnap(PZERO, error, "nfsexcls");
2252                 } while (error == NFSERR_GRACE);
2253                 LIST_REMOVE(op, nfso_list);
2254                 free(op, M_NFSCLOPEN);
2255         }
2256         if (nowp != NULL)
2257                 free(nowp, M_NFSCLOWNER);
2258
2259         TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2260                 do {
2261                         newnfs_copycred(&dp->nfsdl_cred, tcred);
2262                         error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2263                         if (error == NFSERR_GRACE)
2264                                 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2265                 } while (error == NFSERR_GRACE);
2266                 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2267                 free(dp, M_NFSCLDELEG);
2268         }
2269
2270         /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
2271         if (NFSHASNFSV4N(nmp))
2272                 (void)nfsrpc_reclaimcomplete(nmp, cred, p);
2273
2274         NFSLOCKCLSTATE();
2275         clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2276         wakeup(&clp->nfsc_flags);
2277         nfsv4_unlock(&clp->nfsc_lock, 0);
2278         NFSUNLOCKCLSTATE();
2279         NFSFREECRED(tcred);
2280 }
2281
2282 /*
2283  * This function is called when a server replies with NFSERR_EXPIRED.
2284  * It deletes all state for the client and does a fresh SetClientId/confirm.
2285  * XXX Someday it should post a signal to the process(es) that hold the
2286  * state, so they know that lock state has been lost.
2287  */
2288 APPLESTATIC int
2289 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2290 {
2291         struct nfsmount *nmp;
2292         struct ucred *cred;
2293         int igotlock = 0, error, trycnt;
2294
2295         /*
2296          * If the clientid has gone away or a new SetClientid has already
2297          * been done, just return ok.
2298          */
2299         if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2300                 return (0);
2301
2302         /*
2303          * First, lock the client structure, so everyone else will
2304          * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2305          * that only one thread does the work.
2306          */
2307         NFSLOCKCLSTATE();
2308         clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2309         do {
2310                 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2311                     NFSCLSTATEMUTEXPTR, NULL);
2312         } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2313         if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2314                 if (igotlock)
2315                         nfsv4_unlock(&clp->nfsc_lock, 0);
2316                 NFSUNLOCKCLSTATE();
2317                 return (0);
2318         }
2319         clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2320         NFSUNLOCKCLSTATE();
2321
2322         nmp = clp->nfsc_nmp;
2323         if (nmp == NULL)
2324                 panic("nfscl expired");
2325         cred = newnfs_getcred();
2326         trycnt = 5;
2327         do {
2328                 error = nfsrpc_setclient(nmp, clp, 0, cred, p);
2329         } while ((error == NFSERR_STALECLIENTID ||
2330              error == NFSERR_BADSESSION ||
2331              error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2332         if (error) {
2333                 NFSLOCKCLSTATE();
2334                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2335         } else {
2336                 /*
2337                  * Expire the state for the client.
2338                  */
2339                 nfscl_expireclient(clp, nmp, cred, p);
2340                 NFSLOCKCLSTATE();
2341                 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2342                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2343         }
2344         clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2345         wakeup(&clp->nfsc_flags);
2346         nfsv4_unlock(&clp->nfsc_lock, 0);
2347         NFSUNLOCKCLSTATE();
2348         NFSFREECRED(cred);
2349         return (error);
2350 }
2351
2352 /*
2353  * This function inserts a lock in the list after insert_lop.
2354  */
2355 static void
2356 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2357     struct nfscllock *insert_lop, int local)
2358 {
2359
2360         if ((struct nfscllockowner *)insert_lop == lp)
2361                 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2362         else
2363                 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2364         if (local)
2365                 nfsstatsv1.cllocallocks++;
2366         else
2367                 nfsstatsv1.cllocks++;
2368 }
2369
2370 /*
2371  * This function updates the locking for a lock owner and given file. It
2372  * maintains a list of lock ranges ordered on increasing file offset that
2373  * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2374  * It always adds new_lop to the list and sometimes uses the one pointed
2375  * at by other_lopp.
2376  * Returns 1 if the locks were modified, 0 otherwise.
2377  */
2378 static int
2379 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2380     struct nfscllock **other_lopp, int local)
2381 {
2382         struct nfscllock *new_lop = *new_lopp;
2383         struct nfscllock *lop, *tlop, *ilop;
2384         struct nfscllock *other_lop;
2385         int unlock = 0, modified = 0;
2386         u_int64_t tmp;
2387
2388         /*
2389          * Work down the list until the lock is merged.
2390          */
2391         if (new_lop->nfslo_type == F_UNLCK)
2392                 unlock = 1;
2393         ilop = (struct nfscllock *)lp;
2394         lop = LIST_FIRST(&lp->nfsl_lock);
2395         while (lop != NULL) {
2396             /*
2397              * Only check locks for this file that aren't before the start of
2398              * new lock's range.
2399              */
2400             if (lop->nfslo_end >= new_lop->nfslo_first) {
2401                 if (new_lop->nfslo_end < lop->nfslo_first) {
2402                     /*
2403                      * If the new lock ends before the start of the
2404                      * current lock's range, no merge, just insert
2405                      * the new lock.
2406                      */
2407                     break;
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                     /*
2413                      * This lock can be absorbed by the new lock/unlock.
2414                      * This happens when it covers the entire range
2415                      * of the old lock or is contiguous
2416                      * with the old lock and is of the same type or an
2417                      * unlock.
2418                      */
2419                     if (new_lop->nfslo_type != lop->nfslo_type ||
2420                         new_lop->nfslo_first != lop->nfslo_first ||
2421                         new_lop->nfslo_end != lop->nfslo_end)
2422                         modified = 1;
2423                     if (lop->nfslo_first < new_lop->nfslo_first)
2424                         new_lop->nfslo_first = lop->nfslo_first;
2425                     if (lop->nfslo_end > new_lop->nfslo_end)
2426                         new_lop->nfslo_end = lop->nfslo_end;
2427                     tlop = lop;
2428                     lop = LIST_NEXT(lop, nfslo_list);
2429                     nfscl_freelock(tlop, local);
2430                     continue;
2431                 }
2432
2433                 /*
2434                  * All these cases are for contiguous locks that are not the
2435                  * same type, so they can't be merged.
2436                  */
2437                 if (new_lop->nfslo_first <= lop->nfslo_first) {
2438                     /*
2439                      * This case is where the new lock overlaps with the
2440                      * first part of the old lock. Move the start of the
2441                      * old lock to just past the end of the new lock. The
2442                      * new lock will be inserted in front of the old, since
2443                      * ilop hasn't been updated. (We are done now.)
2444                      */
2445                     if (lop->nfslo_first != new_lop->nfslo_end) {
2446                         lop->nfslo_first = new_lop->nfslo_end;
2447                         modified = 1;
2448                     }
2449                     break;
2450                 }
2451                 if (new_lop->nfslo_end >= lop->nfslo_end) {
2452                     /*
2453                      * This case is where the new lock overlaps with the
2454                      * end of the old lock's range. Move the old lock's
2455                      * end to just before the new lock's first and insert
2456                      * the new lock after the old lock.
2457                      * Might not be done yet, since the new lock could
2458                      * overlap further locks with higher ranges.
2459                      */
2460                     if (lop->nfslo_end != new_lop->nfslo_first) {
2461                         lop->nfslo_end = new_lop->nfslo_first;
2462                         modified = 1;
2463                     }
2464                     ilop = lop;
2465                     lop = LIST_NEXT(lop, nfslo_list);
2466                     continue;
2467                 }
2468                 /*
2469                  * The final case is where the new lock's range is in the
2470                  * middle of the current lock's and splits the current lock
2471                  * up. Use *other_lopp to handle the second part of the
2472                  * split old lock range. (We are done now.)
2473                  * For unlock, we use new_lop as other_lop and tmp, since
2474                  * other_lop and new_lop are the same for this case.
2475                  * We noted the unlock case above, so we don't need
2476                  * new_lop->nfslo_type any longer.
2477                  */
2478                 tmp = new_lop->nfslo_first;
2479                 if (unlock) {
2480                     other_lop = new_lop;
2481                     *new_lopp = NULL;
2482                 } else {
2483                     other_lop = *other_lopp;
2484                     *other_lopp = NULL;
2485                 }
2486                 other_lop->nfslo_first = new_lop->nfslo_end;
2487                 other_lop->nfslo_end = lop->nfslo_end;
2488                 other_lop->nfslo_type = lop->nfslo_type;
2489                 lop->nfslo_end = tmp;
2490                 nfscl_insertlock(lp, other_lop, lop, local);
2491                 ilop = lop;
2492                 modified = 1;
2493                 break;
2494             }
2495             ilop = lop;
2496             lop = LIST_NEXT(lop, nfslo_list);
2497             if (lop == NULL)
2498                 break;
2499         }
2500
2501         /*
2502          * Insert the new lock in the list at the appropriate place.
2503          */
2504         if (!unlock) {
2505                 nfscl_insertlock(lp, new_lop, ilop, local);
2506                 *new_lopp = NULL;
2507                 modified = 1;
2508         }
2509         return (modified);
2510 }
2511
2512 /*
2513  * This function must be run as a kernel thread.
2514  * It does Renew Ops and recovery, when required.
2515  */
2516 APPLESTATIC void
2517 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2518 {
2519         struct nfsclowner *owp, *nowp;
2520         struct nfsclopen *op;
2521         struct nfscllockowner *lp, *nlp;
2522         struct nfscldeleghead dh;
2523         struct nfscldeleg *dp, *ndp;
2524         struct ucred *cred;
2525         u_int32_t clidrev;
2526         int error, cbpathdown, islept, igotlock, ret, clearok;
2527         uint32_t recover_done_time = 0;
2528         time_t mytime;
2529         static time_t prevsec = 0;
2530         struct nfscllockownerfh *lfhp, *nlfhp;
2531         struct nfscllockownerfhhead lfh;
2532         struct nfscllayout *lyp, *nlyp;
2533         struct nfscldevinfo *dip, *ndip;
2534         struct nfscllayouthead rlh;
2535         struct nfsclrecalllayout *recallp;
2536         struct nfsclds *dsp;
2537
2538         cred = newnfs_getcred();
2539         NFSLOCKCLSTATE();
2540         clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2541         NFSUNLOCKCLSTATE();
2542         for(;;) {
2543                 newnfs_setroot(cred);
2544                 cbpathdown = 0;
2545                 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2546                         /*
2547                          * Only allow one recover within 1/2 of the lease
2548                          * duration (nfsc_renew).
2549                          */
2550                         if (recover_done_time < NFSD_MONOSEC) {
2551                                 recover_done_time = NFSD_MONOSEC +
2552                                     clp->nfsc_renew;
2553                                 NFSCL_DEBUG(1, "Doing recovery..\n");
2554                                 nfscl_recover(clp, cred, p);
2555                         } else {
2556                                 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n",
2557                                     recover_done_time, (intmax_t)NFSD_MONOSEC);
2558                                 NFSLOCKCLSTATE();
2559                                 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2560                                 NFSUNLOCKCLSTATE();
2561                         }
2562                 }
2563                 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2564                     (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2565                         clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2566                         clidrev = clp->nfsc_clientidrev;
2567                         error = nfsrpc_renew(clp, NULL, cred, p);
2568                         if (error == NFSERR_CBPATHDOWN)
2569                             cbpathdown = 1;
2570                         else if (error == NFSERR_STALECLIENTID ||
2571                             error == NFSERR_BADSESSION) {
2572                             NFSLOCKCLSTATE();
2573                             clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2574                             NFSUNLOCKCLSTATE();
2575                         } else if (error == NFSERR_EXPIRED)
2576                             (void) nfscl_hasexpired(clp, clidrev, p);
2577                 }
2578
2579 checkdsrenew:
2580                 if (NFSHASNFSV4N(clp->nfsc_nmp)) {
2581                         /* Do renews for any DS sessions. */
2582                         NFSLOCKMNT(clp->nfsc_nmp);
2583                         /* Skip first entry, since the MDS is handled above. */
2584                         dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
2585                         if (dsp != NULL)
2586                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2587                         while (dsp != NULL) {
2588                                 if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
2589                                     dsp->nfsclds_sess.nfsess_defunct == 0) {
2590                                         dsp->nfsclds_expire = NFSD_MONOSEC +
2591                                             clp->nfsc_renew;
2592                                         NFSUNLOCKMNT(clp->nfsc_nmp);
2593                                         (void)nfsrpc_renew(clp, dsp, cred, p);
2594                                         goto checkdsrenew;
2595                                 }
2596                                 dsp = TAILQ_NEXT(dsp, nfsclds_list);
2597                         }
2598                         NFSUNLOCKMNT(clp->nfsc_nmp);
2599                 }
2600
2601                 TAILQ_INIT(&dh);
2602                 NFSLOCKCLSTATE();
2603                 if (cbpathdown)
2604                         /* It's a Total Recall! */
2605                         nfscl_totalrecall(clp);
2606
2607                 /*
2608                  * Now, handle defunct owners.
2609                  */
2610                 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2611                         if (LIST_EMPTY(&owp->nfsow_open)) {
2612                                 if (owp->nfsow_defunct != 0)
2613                                         nfscl_freeopenowner(owp, 0);
2614                         }
2615                 }
2616
2617                 /*
2618                  * Do the recall on any delegations. To avoid trouble, always
2619                  * come back up here after having slept.
2620                  */
2621                 igotlock = 0;
2622 tryagain:
2623                 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2624                 while (dp != NULL) {
2625                         ndp = TAILQ_NEXT(dp, nfsdl_list);
2626                         if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2627                                 /*
2628                                  * Wait for outstanding I/O ops to be done.
2629                                  */
2630                                 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2631                                     if (igotlock) {
2632                                         nfsv4_unlock(&clp->nfsc_lock, 0);
2633                                         igotlock = 0;
2634                                     }
2635                                     dp->nfsdl_rwlock.nfslock_lock |=
2636                                         NFSV4LOCK_WANTED;
2637                                     (void) nfsmsleep(&dp->nfsdl_rwlock,
2638                                         NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
2639                                         NULL);
2640                                     goto tryagain;
2641                                 }
2642                                 while (!igotlock) {
2643                                     igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2644                                         &islept, NFSCLSTATEMUTEXPTR, NULL);
2645                                     if (islept)
2646                                         goto tryagain;
2647                                 }
2648                                 NFSUNLOCKCLSTATE();
2649                                 newnfs_copycred(&dp->nfsdl_cred, cred);
2650                                 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2651                                     NULL, cred, p, 1);
2652                                 if (!ret) {
2653                                     nfscl_cleandeleg(dp);
2654                                     TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2655                                         nfsdl_list);
2656                                     LIST_REMOVE(dp, nfsdl_hash);
2657                                     TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2658                                     nfscl_delegcnt--;
2659                                     nfsstatsv1.cldelegates--;
2660                                 }
2661                                 NFSLOCKCLSTATE();
2662                         }
2663                         dp = ndp;
2664                 }
2665
2666                 /*
2667                  * Clear out old delegations, if we are above the high water
2668                  * mark. Only clear out ones with no state related to them.
2669                  * The tailq list is in LRU order.
2670                  */
2671                 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2672                 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2673                     ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2674                     if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2675                         dp->nfsdl_rwlock.nfslock_lock == 0 &&
2676                         dp->nfsdl_timestamp < NFSD_MONOSEC &&
2677                         (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2678                           NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2679                         clearok = 1;
2680                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2681                             op = LIST_FIRST(&owp->nfsow_open);
2682                             if (op != NULL) {
2683                                 clearok = 0;
2684                                 break;
2685                             }
2686                         }
2687                         if (clearok) {
2688                             LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2689                                 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2690                                     clearok = 0;
2691                                     break;
2692                                 }
2693                             }
2694                         }
2695                         if (clearok) {
2696                             TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2697                             LIST_REMOVE(dp, nfsdl_hash);
2698                             TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2699                             nfscl_delegcnt--;
2700                             nfsstatsv1.cldelegates--;
2701                         }
2702                     }
2703                     dp = ndp;
2704                 }
2705                 if (igotlock)
2706                         nfsv4_unlock(&clp->nfsc_lock, 0);
2707
2708                 /*
2709                  * Do the recall on any layouts. To avoid trouble, always
2710                  * come back up here after having slept.
2711                  */
2712                 TAILQ_INIT(&rlh);
2713 tryagain2:
2714                 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
2715                         if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
2716                                 /*
2717                                  * Wait for outstanding I/O ops to be done.
2718                                  */
2719                                 if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
2720                                     (lyp->nfsly_lock.nfslock_lock &
2721                                      NFSV4LOCK_LOCK) != 0) {
2722                                         lyp->nfsly_lock.nfslock_lock |=
2723                                             NFSV4LOCK_WANTED;
2724                                         nfsmsleep(&lyp->nfsly_lock.nfslock_lock,
2725                                             NFSCLSTATEMUTEXPTR, PZERO, "nfslyp",
2726                                             NULL);
2727                                         goto tryagain2;
2728                                 }
2729                                 /* Move the layout to the recall list. */
2730                                 TAILQ_REMOVE(&clp->nfsc_layout, lyp,
2731                                     nfsly_list);
2732                                 LIST_REMOVE(lyp, nfsly_hash);
2733                                 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
2734
2735                                 /* Handle any layout commits. */
2736                                 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
2737                                     (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
2738                                         lyp->nfsly_flags &= ~NFSLY_WRITTEN;
2739                                         NFSUNLOCKCLSTATE();
2740                                         NFSCL_DEBUG(3, "do layoutcommit\n");
2741                                         nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
2742                                             cred, p);
2743                                         NFSLOCKCLSTATE();
2744                                         goto tryagain2;
2745                                 }
2746                         }
2747                 }
2748
2749                 /* Now, look for stale layouts. */
2750                 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
2751                 while (lyp != NULL) {
2752                         nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
2753                         if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
2754                             (lyp->nfsly_flags & NFSLY_RECALL) == 0 &&
2755                             lyp->nfsly_lock.nfslock_usecnt == 0 &&
2756                             lyp->nfsly_lock.nfslock_lock == 0) {
2757                                 NFSCL_DEBUG(4, "ret stale lay=%d\n",
2758                                     nfscl_layoutcnt);
2759                                 recallp = malloc(sizeof(*recallp),
2760                                     M_NFSLAYRECALL, M_NOWAIT);
2761                                 if (recallp == NULL)
2762                                         break;
2763                                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
2764                                     lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
2765                                     lyp->nfsly_stateid.seqid, recallp);
2766                         }
2767                         lyp = nlyp;
2768                 }
2769
2770                 /*
2771                  * Free up any unreferenced device info structures.
2772                  */
2773                 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
2774                         if (dip->nfsdi_layoutrefs == 0 &&
2775                             dip->nfsdi_refcnt == 0) {
2776                                 NFSCL_DEBUG(4, "freeing devinfo\n");
2777                                 LIST_REMOVE(dip, nfsdi_list);
2778                                 nfscl_freedevinfo(dip);
2779                         }
2780                 }
2781                 NFSUNLOCKCLSTATE();
2782
2783                 /* Do layout return(s), as required. */
2784                 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
2785                         TAILQ_REMOVE(&rlh, lyp, nfsly_list);
2786                         NFSCL_DEBUG(4, "ret layout\n");
2787                         nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
2788                         nfscl_freelayout(lyp);
2789                 }
2790
2791                 /*
2792                  * Delegreturn any delegations cleaned out or recalled.
2793                  */
2794                 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
2795                         newnfs_copycred(&dp->nfsdl_cred, cred);
2796                         (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2797                         TAILQ_REMOVE(&dh, dp, nfsdl_list);
2798                         free(dp, M_NFSCLDELEG);
2799                 }
2800
2801                 SLIST_INIT(&lfh);
2802                 /*
2803                  * Call nfscl_cleanupkext() once per second to check for
2804                  * open/lock owners where the process has exited.
2805                  */
2806                 mytime = NFSD_MONOSEC;
2807                 if (prevsec != mytime) {
2808                         prevsec = mytime;
2809                         nfscl_cleanupkext(clp, &lfh);
2810                 }
2811
2812                 /*
2813                  * Do a ReleaseLockOwner for all lock owners where the
2814                  * associated process no longer exists, as found by
2815                  * nfscl_cleanupkext().
2816                  */
2817                 newnfs_setroot(cred);
2818                 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
2819                         LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
2820                             nlp) {
2821                                 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
2822                                     lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
2823                                     p);
2824                                 nfscl_freelockowner(lp, 0);
2825                         }
2826                         free(lfhp, M_TEMP);
2827                 }
2828                 SLIST_INIT(&lfh);
2829
2830                 NFSLOCKCLSTATE();
2831                 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
2832                         (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
2833                             hz);
2834                 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
2835                         clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
2836                         NFSUNLOCKCLSTATE();
2837                         NFSFREECRED(cred);
2838                         wakeup((caddr_t)clp);
2839                         return;
2840                 }
2841                 NFSUNLOCKCLSTATE();
2842         }
2843 }
2844
2845 /*
2846  * Initiate state recovery. Called when NFSERR_STALECLIENTID,
2847  * NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
2848  */
2849 APPLESTATIC void
2850 nfscl_initiate_recovery(struct nfsclclient *clp)
2851 {
2852
2853         if (clp == NULL)
2854                 return;
2855         NFSLOCKCLSTATE();
2856         clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2857         NFSUNLOCKCLSTATE();
2858         wakeup((caddr_t)clp);
2859 }
2860
2861 /*
2862  * Dump out the state stuff for debugging.
2863  */
2864 APPLESTATIC void
2865 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
2866     int lockowner, int locks)
2867 {
2868         struct nfsclclient *clp;
2869         struct nfsclowner *owp;
2870         struct nfsclopen *op;
2871         struct nfscllockowner *lp;
2872         struct nfscllock *lop;
2873         struct nfscldeleg *dp;
2874
2875         clp = nmp->nm_clp;
2876         if (clp == NULL) {
2877                 printf("nfscl dumpstate NULL clp\n");
2878                 return;
2879         }
2880         NFSLOCKCLSTATE();
2881         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2882           LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2883             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2884                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2885                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2886                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2887                     owp->nfsow_seqid);
2888             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2889                 if (opens)
2890                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2891                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2892                         op->nfso_stateid.other[2], op->nfso_opencnt,
2893                         op->nfso_fh[12]);
2894                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2895                     if (lockowner)
2896                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2897                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2898                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2899                             lp->nfsl_seqid,
2900                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2901                             lp->nfsl_stateid.other[2]);
2902                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2903                         if (locks)
2904 #ifdef __FreeBSD__
2905                             printf("lck typ=%d fst=%ju end=%ju\n",
2906                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2907                                 (intmax_t)lop->nfslo_end);
2908 #else
2909                             printf("lck typ=%d fst=%qd end=%qd\n",
2910                                 lop->nfslo_type, lop->nfslo_first,
2911                                 lop->nfslo_end);
2912 #endif
2913                     }
2914                 }
2915             }
2916           }
2917         }
2918         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2919             if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2920                 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2921                     owp->nfsow_owner[0], owp->nfsow_owner[1],
2922                     owp->nfsow_owner[2], owp->nfsow_owner[3],
2923                     owp->nfsow_seqid);
2924             LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2925                 if (opens)
2926                     printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2927                         op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2928                         op->nfso_stateid.other[2], op->nfso_opencnt,
2929                         op->nfso_fh[12]);
2930                 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2931                     if (lockowner)
2932                         printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2933                             lp->nfsl_owner[0], lp->nfsl_owner[1],
2934                             lp->nfsl_owner[2], lp->nfsl_owner[3],
2935                             lp->nfsl_seqid,
2936                             lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2937                             lp->nfsl_stateid.other[2]);
2938                     LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2939                         if (locks)
2940 #ifdef __FreeBSD__
2941                             printf("lck typ=%d fst=%ju end=%ju\n",
2942                                 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2943                                 (intmax_t)lop->nfslo_end);
2944 #else
2945                             printf("lck typ=%d fst=%qd end=%qd\n",
2946                                 lop->nfslo_type, lop->nfslo_first,
2947                                 lop->nfslo_end);
2948 #endif
2949                     }
2950                 }
2951             }
2952         }
2953         NFSUNLOCKCLSTATE();
2954 }
2955
2956 /*
2957  * Check for duplicate open owners and opens.
2958  * (Only used as a diagnostic aid.)
2959  */
2960 APPLESTATIC void
2961 nfscl_dupopen(vnode_t vp, int dupopens)
2962 {
2963         struct nfsclclient *clp;
2964         struct nfsclowner *owp, *owp2;
2965         struct nfsclopen *op, *op2;
2966         struct nfsfh *nfhp;
2967
2968         clp = VFSTONFS(vnode_mount(vp))->nm_clp;
2969         if (clp == NULL) {
2970                 printf("nfscl dupopen NULL clp\n");
2971                 return;
2972         }
2973         nfhp = VTONFS(vp)->n_fhp;
2974         NFSLOCKCLSTATE();
2975
2976         /*
2977          * First, search for duplicate owners.
2978          * These should never happen!
2979          */
2980         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2981             LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2982                 if (owp != owp2 &&
2983                     !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
2984                     NFSV4CL_LOCKNAMELEN)) {
2985                         NFSUNLOCKCLSTATE();
2986                         printf("DUP OWNER\n");
2987                         nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
2988                         return;
2989                 }
2990             }
2991         }
2992
2993         /*
2994          * Now, search for duplicate stateids.
2995          * These shouldn't happen, either.
2996          */
2997         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2998             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2999                 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3000                     LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3001                         if (op != op2 &&
3002                             (op->nfso_stateid.other[0] != 0 ||
3003                              op->nfso_stateid.other[1] != 0 ||
3004                              op->nfso_stateid.other[2] != 0) &&
3005                             op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
3006                             op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
3007                             op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
3008                             NFSUNLOCKCLSTATE();
3009                             printf("DUP STATEID\n");
3010                             nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
3011                                 0);
3012                             return;
3013                         }
3014                     }
3015                 }
3016             }
3017         }
3018
3019         /*
3020          * Now search for duplicate opens.
3021          * Duplicate opens for the same owner
3022          * should never occur. Other duplicates are
3023          * possible and are checked for if "dupopens"
3024          * is true.
3025          */
3026         LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
3027             LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
3028                 if (nfhp->nfh_len == op2->nfso_fhlen &&
3029                     !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
3030                     LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3031                         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3032                             if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
3033                                 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
3034                                 (!NFSBCMP(op->nfso_own->nfsow_owner,
3035                                  op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
3036                                  dupopens)) {
3037                                 if (!NFSBCMP(op->nfso_own->nfsow_owner,
3038                                     op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3039                                     NFSUNLOCKCLSTATE();
3040                                     printf("BADDUP OPEN\n");
3041                                 } else {
3042                                     NFSUNLOCKCLSTATE();
3043                                     printf("DUP OPEN\n");
3044                                 }
3045                                 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
3046                                     0, 0);
3047                                 return;
3048                             }
3049                         }
3050                     }
3051                 }
3052             }
3053         }
3054         NFSUNLOCKCLSTATE();
3055 }
3056
3057 /*
3058  * During close, find an open that needs to be dereferenced and
3059  * dereference it. If there are no more opens for this file,
3060  * log a message to that effect.
3061  * Opens aren't actually Close'd until VOP_INACTIVE() is performed
3062  * on the file's vnode.
3063  * This is the safe way, since it is difficult to identify
3064  * which open the close is for and I/O can be performed after the
3065  * close(2) system call when a file is mmap'd.
3066  * If it returns 0 for success, there will be a referenced
3067  * clp returned via clpp.
3068  */
3069 APPLESTATIC int
3070 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
3071 {
3072         struct nfsclclient *clp;
3073         struct nfsclowner *owp;
3074         struct nfsclopen *op;
3075         struct nfscldeleg *dp;
3076         struct nfsfh *nfhp;
3077         int error, notdecr;
3078
3079         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3080         if (error)
3081                 return (error);
3082         *clpp = clp;
3083
3084         nfhp = VTONFS(vp)->n_fhp;
3085         notdecr = 1;
3086         NFSLOCKCLSTATE();
3087         /*
3088          * First, look for one under a delegation that was locally issued
3089          * and just decrement the opencnt for it. Since all my Opens against
3090          * the server are DENY_NONE, I don't see a problem with hanging
3091          * onto them. (It is much easier to use one of the extant Opens
3092          * that I already have on the server when a Delegation is recalled
3093          * than to do fresh Opens.) Someday, I might need to rethink this, but.
3094          */
3095         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3096         if (dp != NULL) {
3097                 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3098                         op = LIST_FIRST(&owp->nfsow_open);
3099                         if (op != NULL) {
3100                                 /*
3101                                  * Since a delegation is for a file, there
3102                                  * should never be more than one open for
3103                                  * each openowner.
3104                                  */
3105                                 if (LIST_NEXT(op, nfso_list) != NULL)
3106                                         panic("nfscdeleg opens");
3107                                 if (notdecr && op->nfso_opencnt > 0) {
3108                                         notdecr = 0;
3109                                         op->nfso_opencnt--;
3110                                         break;
3111                                 }
3112                         }
3113                 }
3114         }
3115
3116         /* Now process the opens against the server. */
3117         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3118                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3119                         if (op->nfso_fhlen == nfhp->nfh_len &&
3120                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3121                             nfhp->nfh_len)) {
3122                                 /* Found an open, decrement cnt if possible */
3123                                 if (notdecr && op->nfso_opencnt > 0) {
3124                                         notdecr = 0;
3125                                         op->nfso_opencnt--;
3126                                 }
3127                                 /*
3128                                  * There are more opens, so just return.
3129                                  */
3130                                 if (op->nfso_opencnt > 0) {
3131                                         NFSUNLOCKCLSTATE();
3132                                         return (0);
3133                                 }
3134                         }
3135                 }
3136         }
3137         NFSUNLOCKCLSTATE();
3138         if (notdecr)
3139                 printf("nfscl: never fnd open\n");
3140         return (0);
3141 }
3142
3143 APPLESTATIC int
3144 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
3145 {
3146         struct nfsclclient *clp;
3147         struct nfsclowner *owp, *nowp;
3148         struct nfsclopen *op;
3149         struct nfscldeleg *dp;
3150         struct nfsfh *nfhp;
3151         struct nfsclrecalllayout *recallp;
3152         int error;
3153
3154         error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp);
3155         if (error)
3156                 return (error);
3157         *clpp = clp;
3158
3159         nfhp = VTONFS(vp)->n_fhp;
3160         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
3161         NFSLOCKCLSTATE();
3162         /*
3163          * First get rid of the local Open structures, which should be no
3164          * longer in use.
3165          */
3166         dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
3167         if (dp != NULL) {
3168                 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
3169                         op = LIST_FIRST(&owp->nfsow_open);
3170                         if (op != NULL) {
3171                                 KASSERT((op->nfso_opencnt == 0),
3172                                     ("nfscl: bad open cnt on deleg"));
3173                                 nfscl_freeopen(op, 1);
3174                         }
3175                         nfscl_freeopenowner(owp, 1);
3176                 }
3177         }
3178
3179         /* Return any layouts marked return on close. */
3180         nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp);
3181
3182         /* Now process the opens against the server. */
3183 lookformore:
3184         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3185                 op = LIST_FIRST(&owp->nfsow_open);
3186                 while (op != NULL) {
3187                         if (op->nfso_fhlen == nfhp->nfh_len &&
3188                             !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
3189                             nfhp->nfh_len)) {
3190                                 /* Found an open, close it. */
3191                                 KASSERT((op->nfso_opencnt == 0),
3192                                     ("nfscl: bad open cnt on server"));
3193                                 NFSUNLOCKCLSTATE();
3194                                 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
3195                                     p);
3196                                 NFSLOCKCLSTATE();
3197                                 goto lookformore;
3198                         }
3199                         op = LIST_NEXT(op, nfso_list);
3200                 }
3201         }
3202         NFSUNLOCKCLSTATE();
3203         /*
3204          * recallp has been set NULL by nfscl_retoncloselayout() if it was
3205          * used by the function, but calling free() with a NULL pointer is ok.
3206          */
3207         free(recallp, M_NFSLAYRECALL);
3208         return (0);
3209 }
3210
3211 /*
3212  * Return all delegations on this client.
3213  * (Must be called with client sleep lock.)
3214  */
3215 static void
3216 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
3217 {
3218         struct nfscldeleg *dp, *ndp;
3219         struct ucred *cred;
3220
3221         cred = newnfs_getcred();
3222         TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3223                 nfscl_cleandeleg(dp);
3224                 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3225                 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3226         }
3227         NFSFREECRED(cred);
3228 }
3229
3230 /*
3231  * Do a callback RPC.
3232  */
3233 APPLESTATIC void
3234 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3235 {
3236         int clist, gotseq_ok, i, j, k, op, rcalls;
3237         u_int32_t *tl;
3238         struct nfsclclient *clp;
3239         struct nfscldeleg *dp = NULL;
3240         int numops, taglen = -1, error = 0, trunc;
3241         u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
3242         u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3243         vnode_t vp = NULL;
3244         struct nfsnode *np;
3245         struct vattr va;
3246         struct nfsfh *nfhp;
3247         mount_t mp;
3248         nfsattrbit_t attrbits, rattrbits;
3249         nfsv4stateid_t stateid;
3250         uint32_t seqid, slotid = 0, highslot, cachethis;
3251         uint8_t sessionid[NFSX_V4SESSIONID];
3252         struct mbuf *rep;
3253         struct nfscllayout *lyp;
3254         uint64_t filesid[2], len, off;
3255         int changed, gotone, laytype, recalltype;
3256         uint32_t iomode;
3257         struct nfsclrecalllayout *recallp = NULL;
3258         struct nfsclsession *tsep;
3259
3260         gotseq_ok = 0;
3261         nfsrvd_rephead(nd);
3262         NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3263         taglen = fxdr_unsigned(int, *tl);
3264         if (taglen < 0) {
3265                 error = EBADRPC;
3266                 goto nfsmout;
3267         }
3268         if (taglen <= NFSV4_SMALLSTR)
3269                 tagstr = tag;
3270         else
3271                 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3272         error = nfsrv_mtostr(nd, tagstr, taglen);
3273         if (error) {
3274                 if (taglen > NFSV4_SMALLSTR)
3275                         free(tagstr, M_TEMP);
3276                 taglen = -1;
3277                 goto nfsmout;
3278         }
3279         (void) nfsm_strtom(nd, tag, taglen);
3280         if (taglen > NFSV4_SMALLSTR) {
3281                 free(tagstr, M_TEMP);
3282         }
3283         NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3284         NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3285         minorvers = fxdr_unsigned(u_int32_t, *tl++);
3286         if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION)
3287                 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3288         cbident = fxdr_unsigned(u_int32_t, *tl++);
3289         if (nd->nd_repstat)
3290                 numops = 0;
3291         else
3292                 numops = fxdr_unsigned(int, *tl);
3293         /*
3294          * Loop around doing the sub ops.
3295          */
3296         for (i = 0; i < numops; i++) {
3297                 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3298                 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3299                 *repp++ = *tl;
3300                 op = fxdr_unsigned(int, *tl);
3301                 if (op < NFSV4OP_CBGETATTR ||
3302                    (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
3303                    (op > NFSV4OP_CBNOTIFYDEVID &&
3304                     minorvers == NFSV41_MINORVERSION)) {
3305                     nd->nd_repstat = NFSERR_OPILLEGAL;
3306                     *repp = nfscl_errmap(nd, minorvers);
3307                     retops++;
3308                     break;
3309                 }
3310                 nd->nd_procnum = op;
3311                 if (op < NFSV41_CBNOPS)
3312                         nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
3313                 switch (op) {
3314                 case NFSV4OP_CBGETATTR:
3315                         NFSCL_DEBUG(4, "cbgetattr\n");
3316                         mp = NULL;
3317                         vp = NULL;
3318                         error = nfsm_getfh(nd, &nfhp);
3319                         if (!error)
3320                                 error = nfsrv_getattrbits(nd, &attrbits,
3321                                     NULL, NULL);
3322                         if (error == 0 && i == 0 &&
3323                             minorvers != NFSV4_MINORVERSION)
3324                                 error = NFSERR_OPNOTINSESS;
3325                         if (!error) {
3326                                 mp = nfscl_getmnt(minorvers, sessionid, cbident,
3327                                     &clp);
3328                                 if (mp == NULL)
3329                                         error = NFSERR_SERVERFAULT;
3330                         }
3331                         if (!error) {
3332                                 error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3333                                     nfhp->nfh_len, p, &np);
3334                                 if (!error)
3335                                         vp = NFSTOV(np);
3336                         }
3337                         if (!error) {
3338                                 NFSZERO_ATTRBIT(&rattrbits);
3339                                 NFSLOCKCLSTATE();
3340                                 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3341                                     nfhp->nfh_len);
3342                                 if (dp != NULL) {
3343                                         if (NFSISSET_ATTRBIT(&attrbits,
3344                                             NFSATTRBIT_SIZE)) {
3345                                                 if (vp != NULL)
3346                                                         va.va_size = np->n_size;
3347                                                 else
3348                                                         va.va_size =
3349                                                             dp->nfsdl_size;
3350                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3351                                                     NFSATTRBIT_SIZE);
3352                                         }
3353                                         if (NFSISSET_ATTRBIT(&attrbits,
3354                                             NFSATTRBIT_CHANGE)) {
3355                                                 va.va_filerev =
3356                                                     dp->nfsdl_change;
3357                                                 if (vp == NULL ||
3358                                                     (np->n_flag & NDELEGMOD))
3359                                                         va.va_filerev++;
3360                                                 NFSSETBIT_ATTRBIT(&rattrbits,
3361                                                     NFSATTRBIT_CHANGE);
3362                                         }
3363                                 } else
3364                                         error = NFSERR_SERVERFAULT;
3365                                 NFSUNLOCKCLSTATE();
3366                         }
3367                         if (vp != NULL)
3368                                 vrele(vp);
3369                         if (mp != NULL)
3370                                 vfs_unbusy(mp);
3371                         if (nfhp != NULL)
3372                                 free(nfhp, M_NFSFH);
3373                         if (!error)
3374                                 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3375                                     NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
3376                                     (uint64_t)0);
3377                         break;
3378                 case NFSV4OP_CBRECALL:
3379                         NFSCL_DEBUG(4, "cbrecall\n");
3380                         NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3381                             NFSX_UNSIGNED);
3382                         stateid.seqid = *tl++;
3383                         NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3384                             NFSX_STATEIDOTHER);
3385                         tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3386                         trunc = fxdr_unsigned(int, *tl);
3387                         error = nfsm_getfh(nd, &nfhp);
3388                         if (error == 0 && i == 0 &&
3389                             minorvers != NFSV4_MINORVERSION)
3390                                 error = NFSERR_OPNOTINSESS;
3391                         if (!error) {
3392                                 NFSLOCKCLSTATE();
3393                                 if (minorvers == NFSV4_MINORVERSION)
3394                                         clp = nfscl_getclnt(cbident);
3395                                 else
3396                                         clp = nfscl_getclntsess(sessionid);
3397                                 if (clp != NULL) {
3398                                         dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3399                                             nfhp->nfh_len);
3400                                         if (dp != NULL && (dp->nfsdl_flags &
3401                                             NFSCLDL_DELEGRET) == 0) {
3402                                                 dp->nfsdl_flags |=
3403                                                     NFSCLDL_RECALL;
3404                                                 wakeup((caddr_t)clp);
3405                                         }
3406                                 } else {
3407                                         error = NFSERR_SERVERFAULT;
3408                                 }
3409                                 NFSUNLOCKCLSTATE();
3410                         }
3411                         if (nfhp != NULL)
3412                                 free(nfhp, M_NFSFH);
3413                         break;
3414                 case NFSV4OP_CBLAYOUTRECALL:
3415                         NFSCL_DEBUG(4, "cblayrec\n");
3416                         nfhp = NULL;
3417                         NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
3418                         laytype = fxdr_unsigned(int, *tl++);
3419                         iomode = fxdr_unsigned(uint32_t, *tl++);
3420                         if (newnfs_true == *tl++)
3421                                 changed = 1;
3422                         else
3423                                 changed = 0;
3424                         recalltype = fxdr_unsigned(int, *tl);
3425                         recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
3426                             M_WAITOK);
3427                         if (laytype != NFSLAYOUT_NFSV4_1_FILES)
3428                                 error = NFSERR_NOMATCHLAYOUT;
3429                         else if (recalltype == NFSLAYOUTRETURN_FILE) {
3430                                 error = nfsm_getfh(nd, &nfhp);
3431                                 NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
3432                                 if (error != 0)
3433                                         goto nfsmout;
3434                                 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
3435                                     NFSX_STATEID);
3436                                 off = fxdr_hyper(tl); tl += 2;
3437                                 len = fxdr_hyper(tl); tl += 2;
3438                                 stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
3439                                 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
3440                                 if (minorvers == NFSV4_MINORVERSION)
3441                                         error = NFSERR_NOTSUPP;
3442                                 else if (i == 0)
3443                                         error = NFSERR_OPNOTINSESS;
3444                                 if (error == 0) {
3445                                         NFSLOCKCLSTATE();
3446                                         clp = nfscl_getclntsess(sessionid);
3447                                         NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
3448                                         if (clp != NULL) {
3449                                                 lyp = nfscl_findlayout(clp,
3450                                                     nfhp->nfh_fh,
3451                                                     nfhp->nfh_len);
3452                                                 NFSCL_DEBUG(4, "cblyp=%p\n",
3453                                                     lyp);
3454                                                 if (lyp != NULL &&
3455                                                     (lyp->nfsly_flags &
3456                                                      NFSLY_FILES) != 0 &&
3457                                                     !NFSBCMP(stateid.other,
3458                                                     lyp->nfsly_stateid.other,
3459                                                     NFSX_STATEIDOTHER)) {
3460                                                         error =
3461                                                             nfscl_layoutrecall(
3462                                                             recalltype,
3463                                                             lyp, iomode, off,
3464                                                             len, stateid.seqid,
3465                                                             recallp);
3466                                                         recallp = NULL;
3467                                                         wakeup(clp);
3468                                                         NFSCL_DEBUG(4,
3469                                                             "aft layrcal=%d\n",
3470                                                             error);
3471                                                 } else
3472                                                         error =
3473                                                           NFSERR_NOMATCHLAYOUT;
3474                                         } else
3475                                                 error = NFSERR_NOMATCHLAYOUT;
3476                                         NFSUNLOCKCLSTATE();
3477                                 }
3478                                 free(nfhp, M_NFSFH);
3479                         } else if (recalltype == NFSLAYOUTRETURN_FSID) {
3480                                 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
3481                                 filesid[0] = fxdr_hyper(tl); tl += 2;
3482                                 filesid[1] = fxdr_hyper(tl); tl += 2;
3483                                 gotone = 0;
3484                                 NFSLOCKCLSTATE();
3485                                 clp = nfscl_getclntsess(sessionid);
3486                                 if (clp != NULL) {
3487                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3488                                             nfsly_list) {
3489                                                 if (lyp->nfsly_filesid[0] ==
3490                                                     filesid[0] &&
3491                                                     lyp->nfsly_filesid[1] ==
3492                                                     filesid[1]) {
3493                                                         error =
3494                                                             nfscl_layoutrecall(
3495                                                             recalltype,
3496                                                             lyp, iomode, 0,
3497                                                             UINT64_MAX,
3498                                                             lyp->nfsly_stateid.seqid,
3499                                                             recallp);
3500                                                         recallp = NULL;
3501                                                         gotone = 1;
3502                                                 }
3503                                         }
3504                                         if (gotone != 0)
3505                                                 wakeup(clp);
3506                                         else
3507                                                 error = NFSERR_NOMATCHLAYOUT;
3508                                 } else
3509                                         error = NFSERR_NOMATCHLAYOUT;
3510                                 NFSUNLOCKCLSTATE();
3511                         } else if (recalltype == NFSLAYOUTRETURN_ALL) {
3512                                 gotone = 0;
3513                                 NFSLOCKCLSTATE();
3514                                 clp = nfscl_getclntsess(sessionid);
3515                                 if (clp != NULL) {
3516                                         TAILQ_FOREACH(lyp, &clp->nfsc_layout,
3517                                             nfsly_list) {
3518                                                 error = nfscl_layoutrecall(
3519                                                     recalltype, lyp, iomode, 0,
3520                                                     UINT64_MAX,
3521                                                     lyp->nfsly_stateid.seqid,
3522                                                     recallp);
3523                                                 recallp = NULL;
3524                                                 gotone = 1;
3525                                         }
3526                                         if (gotone != 0)
3527                                                 wakeup(clp);
3528                                         else
3529                                                 error = NFSERR_NOMATCHLAYOUT;
3530                                 } else
3531                                         error = NFSERR_NOMATCHLAYOUT;
3532                                 NFSUNLOCKCLSTATE();
3533                         } else
3534                                 error = NFSERR_NOMATCHLAYOUT;
3535                         if (recallp != NULL) {
3536                                 free(recallp, M_NFSLAYRECALL);
3537                                 recallp = NULL;
3538                         }
3539                         break;
3540                 case NFSV4OP_CBSEQUENCE:
3541                         NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3542                             5 * NFSX_UNSIGNED);
3543                         bcopy(tl, sessionid, NFSX_V4SESSIONID);
3544                         tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3545                         seqid = fxdr_unsigned(uint32_t, *tl++);
3546                         slotid = fxdr_unsigned(uint32_t, *tl++);
3547                         highslot = fxdr_unsigned(uint32_t, *tl++);
3548                         cachethis = *tl++;
3549                         /* Throw away the referring call stuff. */
3550                         clist = fxdr_unsigned(int, *tl);
3551                         for (j = 0; j < clist; j++) {
3552                                 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
3553                                     NFSX_UNSIGNED);
3554                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3555                                 rcalls = fxdr_unsigned(int, *tl);
3556                                 for (k = 0; k < rcalls; k++) {
3557                                         NFSM_DISSECT(tl, uint32_t *,
3558                                             2 * NFSX_UNSIGNED);
3559                                 }
3560                         }
3561                         NFSLOCKCLSTATE();
3562                         if (i == 0) {
3563                                 clp = nfscl_getclntsess(sessionid);
3564                                 if (clp == NULL)
3565                                         error = NFSERR_SERVERFAULT;
3566                         } else
3567                                 error = NFSERR_SEQUENCEPOS;
3568                         if (error == 0) {
3569                                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3570                                 error = nfsv4_seqsession(seqid, slotid,
3571                                     highslot, tsep->nfsess_cbslots, &rep,
3572                                     tsep->nfsess_backslots);
3573                         }
3574                         NFSUNLOCKCLSTATE();
3575                         if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
3576                                 gotseq_ok = 1;
3577                                 if (rep != NULL) {
3578                                         /*
3579                                          * Handle a reply for a retried
3580                                          * callback.  The reply will be
3581                                          * re-inserted in the session cache
3582                                          * by the nfsv4_seqsess_cacherep() call
3583                                          * after out:
3584                                          */
3585                                         KASSERT(error == NFSERR_REPLYFROMCACHE,
3586                                             ("cbsequence: non-NULL rep"));
3587                                         NFSCL_DEBUG(4, "Got cbretry\n");
3588                                         m_freem(nd->nd_mreq);
3589                                         nd->nd_mreq = rep;
3590                                         rep = NULL;
3591                                         goto out;
3592                                 }
3593                                 NFSM_BUILD(tl, uint32_t *,
3594                                     NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
3595                                 bcopy(sessionid, tl, NFSX_V4SESSIONID);
3596                                 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
3597                                 *tl++ = txdr_unsigned(seqid);
3598                                 *tl++ = txdr_unsigned(slotid);
3599                                 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
3600                                 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
3601                         }
3602                         break;
3603                 default:
3604                         if (i == 0 && minorvers == NFSV41_MINORVERSION)
3605                                 error = NFSERR_OPNOTINSESS;
3606                         else {
3607                                 NFSCL_DEBUG(1, "unsupp callback %d\n", op);
3608                                 error = NFSERR_NOTSUPP;
3609                         }
3610                         break;
3611                 }
3612                 if (error) {
3613                         if (error == EBADRPC || error == NFSERR_BADXDR) {
3614                                 nd->nd_repstat = NFSERR_BADXDR;
3615                         } else {
3616                                 nd->nd_repstat = error;
3617                         }
3618                         error = 0;
3619                 }
3620                 retops++;
3621                 if (nd->nd_repstat) {
3622                         *repp = nfscl_errmap(nd, minorvers);
3623                         break;
3624                 } else
3625                         *repp = 0;      /* NFS4_OK */
3626         }
3627 nfsmout:
3628         if (recallp != NULL)
3629                 free(recallp, M_NFSLAYRECALL);
3630         if (error) {
3631                 if (error == EBADRPC || error == NFSERR_BADXDR)
3632                         nd->nd_repstat = NFSERR_BADXDR;
3633                 else
3634                         printf("nfsv4 comperr1=%d\n", error);
3635         }
3636         if (taglen == -1) {
3637                 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3638                 *tl++ = 0;
3639                 *tl = 0;
3640         } else {
3641                 *retopsp = txdr_unsigned(retops);
3642         }
3643         *nd->nd_errp = nfscl_errmap(nd, minorvers);
3644 out:
3645         if (gotseq_ok != 0) {
3646                 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
3647                 NFSLOCKCLSTATE();
3648                 clp = nfscl_getclntsess(sessionid);
3649                 if (clp != NULL) {
3650                         tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3651                         nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
3652                             NFSERR_OK, &rep);
3653                         NFSUNLOCKCLSTATE();
3654                 } else {
3655                         NFSUNLOCKCLSTATE();
3656                         m_freem(rep);
3657                 }
3658         }
3659 }
3660
3661 /*
3662  * Generate the next cbident value. Basically just increment a static value
3663  * and then check that it isn't already in the list, if it has wrapped around.
3664  */
3665 static u_int32_t
3666 nfscl_nextcbident(void)
3667 {
3668         struct nfsclclient *clp;
3669         int matched;
3670         static u_int32_t nextcbident = 0;
3671         static int haswrapped = 0;
3672
3673         nextcbident++;
3674         if (nextcbident == 0)
3675                 haswrapped = 1;
3676         if (haswrapped) {
3677                 /*
3678                  * Search the clientid list for one already using this cbident.
3679                  */
3680                 do {
3681                         matched = 0;
3682                         NFSLOCKCLSTATE();
3683                         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3684                                 if (clp->nfsc_cbident == nextcbident) {
3685                                         matched = 1;
3686                                         break;
3687                                 }
3688                         }
3689                         NFSUNLOCKCLSTATE();
3690                         if (matched == 1)
3691                                 nextcbident++;
3692                 } while (matched);
3693         }
3694         return (nextcbident);
3695 }
3696
3697 /*
3698  * Get the mount point related to a given cbident or session and busy it.
3699  */
3700 static mount_t
3701 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
3702     struct nfsclclient **clpp)
3703 {
3704         struct nfsclclient *clp;
3705         mount_t mp;
3706         int error;
3707         struct nfsclsession *tsep;
3708
3709         *clpp = NULL;
3710         NFSLOCKCLSTATE();
3711         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3712                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3713                 if (minorvers == NFSV4_MINORVERSION) {
3714                         if (clp->nfsc_cbident == cbident)
3715                                 break;
3716                 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3717                     NFSX_V4SESSIONID))
3718                         break;
3719         }
3720         if (clp == NULL) {
3721                 NFSUNLOCKCLSTATE();
3722                 return (NULL);
3723         }
3724         mp = clp->nfsc_nmp->nm_mountp;
3725         vfs_ref(mp);
3726         NFSUNLOCKCLSTATE();
3727         error = vfs_busy(mp, 0);
3728         vfs_rel(mp);
3729         if (error != 0)
3730                 return (NULL);
3731         *clpp = clp;
3732         return (mp);
3733 }
3734
3735 /*
3736  * Get the clientid pointer related to a given cbident.
3737  */
3738 static struct nfsclclient *
3739 nfscl_getclnt(u_int32_t cbident)
3740 {
3741         struct nfsclclient *clp;
3742
3743         LIST_FOREACH(clp, &nfsclhead, nfsc_list)
3744                 if (clp->nfsc_cbident == cbident)
3745                         break;
3746         return (clp);
3747 }
3748
3749 /*
3750  * Get the clientid pointer related to a given sessionid.
3751  */
3752 static struct nfsclclient *
3753 nfscl_getclntsess(uint8_t *sessionid)
3754 {
3755         struct nfsclclient *clp;
3756         struct nfsclsession *tsep;
3757
3758         LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3759                 tsep = nfsmnt_mdssession(clp->nfsc_nmp);
3760                 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
3761                     NFSX_V4SESSIONID))
3762                         break;
3763         }
3764         return (clp);
3765 }
3766
3767 /*
3768  * Search for a lock conflict locally on the client. A conflict occurs if
3769  * - not same owner and overlapping byte range and at least one of them is
3770  *   a write lock or this is an unlock.
3771  */
3772 static int
3773 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
3774     struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
3775     struct nfscllock **lopp)
3776 {
3777         struct nfsclowner *owp;
3778         struct nfsclopen *op;
3779         int ret;
3780
3781         if (dp != NULL) {
3782                 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
3783                 if (ret)
3784                         return (ret);
3785         }
3786         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3787                 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3788                         if (op->nfso_fhlen == fhlen &&
3789                             !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
3790                                 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
3791                                     own, lopp);
3792                                 if (ret)
3793                                         return (ret);
3794                         }
3795                 }
3796         }
3797         return (0);
3798 }
3799
3800 static int
3801 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
3802     u_int8_t *own, struct nfscllock **lopp)
3803 {
3804         struct nfscllockowner *lp;
3805         struct nfscllock *lop;
3806
3807         LIST_FOREACH(lp, lhp, nfsl_list) {
3808                 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
3809                         LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3810                                 if (lop->nfslo_first >= nlop->nfslo_end)
3811                                         break;
3812                                 if (lop->nfslo_end <= nlop->nfslo_first)
3813                                         continue;
3814                                 if (lop->nfslo_type == F_WRLCK ||
3815                                     nlop->nfslo_type == F_WRLCK ||
3816                                     nlop->nfslo_type == F_UNLCK) {
3817                                         if (lopp != NULL)
3818                                                 *lopp = lop;
3819                                         return (NFSERR_DENIED);
3820                                 }
3821                         }
3822                 }
3823         }
3824         return (0);
3825 }
3826
3827 /*
3828  * Check for a local conflicting lock.
3829  */
3830 APPLESTATIC int
3831 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
3832     u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
3833 {
3834         struct nfscllock *lop, nlck;
3835         struct nfscldeleg *dp;
3836         struct nfsnode *np;
3837         u_int8_t own[NFSV4CL_LOCKNAMELEN];
3838         int error;
3839
3840         nlck.nfslo_type = fl->l_type;
3841         nlck.nfslo_first = off;
3842         if (len == NFS64BITSSET) {
3843                 nlck.nfslo_end = NFS64BITSSET;
3844         } else {
3845                 nlck.nfslo_end = off + len;
3846                 if (nlck.nfslo_end <= nlck.nfslo_first)
3847                         return (NFSERR_INVAL);
3848         }
3849         np = VTONFS(vp);
3850         nfscl_filllockowner(id, own, flags);
3851         NFSLOCKCLSTATE();
3852         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3853         error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
3854             &nlck, own, dp, &lop);
3855         if (error != 0) {
3856                 fl->l_whence = SEEK_SET;
3857                 fl->l_start = lop->nfslo_first;
3858                 if (lop->nfslo_end == NFS64BITSSET)
3859                         fl->l_len = 0;
3860                 else
3861                         fl->l_len = lop->nfslo_end - lop->nfslo_first;
3862                 fl->l_pid = (pid_t)0;
3863                 fl->l_type = lop->nfslo_type;
3864                 error = -1;                     /* no RPC required */
3865         } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
3866             fl->l_type == F_RDLCK)) {
3867                 /*
3868                  * The delegation ensures that there isn't a conflicting
3869                  * lock on the server, so return -1 to indicate an RPC
3870                  * isn't required.
3871                  */
3872                 fl->l_type = F_UNLCK;
3873                 error = -1;
3874         }
3875         NFSUNLOCKCLSTATE();
3876         return (error);
3877 }
3878
3879 /*
3880  * Handle Recall of a delegation.
3881  * The clp must be exclusive locked when this is called.
3882  */
3883 static int
3884 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
3885     struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
3886     int called_from_renewthread)
3887 {
3888         struct nfsclowner *owp, *lowp, *nowp;
3889         struct nfsclopen *op, *lop;
3890         struct nfscllockowner *lp;
3891         struct nfscllock *lckp;
3892         struct nfsnode *np;
3893         int error = 0, ret, gotvp = 0;
3894
3895         if (vp == NULL) {
3896                 /*
3897                  * First, get a vnode for the file. This is needed to do RPCs.
3898                  */
3899                 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
3900                     dp->nfsdl_fhlen, p, &np);
3901                 if (ret) {
3902                         /*
3903                          * File isn't open, so nothing to move over to the
3904                          * server.
3905                          */
3906                         return (0);
3907                 }
3908                 vp = NFSTOV(np);
3909                 gotvp = 1;
3910         } else {
3911                 np = VTONFS(vp);
3912         }
3913         dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
3914
3915         /*
3916          * Ok, if it's a write delegation, flush data to the server, so
3917          * that close/open consistency is retained.
3918          */
3919         ret = 0;
3920         NFSLOCKNODE(np);
3921         if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
3922                 np->n_flag |= NDELEGRECALL;
3923                 NFSUNLOCKNODE(np);
3924                 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
3925                 NFSLOCKNODE(np);
3926                 np->n_flag &= ~NDELEGRECALL;
3927         }
3928         NFSINVALATTRCACHE(np);
3929         NFSUNLOCKNODE(np);
3930         if (ret == EIO && called_from_renewthread != 0) {
3931                 /*
3932                  * If the flush failed with EIO for the renew thread,
3933                  * return now, so that the dirty buffer will be flushed
3934                  * later.
3935                  */
3936                 if (gotvp != 0)
3937                         vrele(vp);
3938                 return (ret);
3939         }
3940
3941         /*
3942          * Now, for each openowner with opens issued locally, move them
3943          * over to state against the server.
3944          */
3945         LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
3946                 lop = LIST_FIRST(&lowp->nfsow_open);
3947                 if (lop != NULL) {
3948                         if (LIST_NEXT(lop, nfso_list) != NULL)
3949                                 panic("nfsdlg mult opens");
3950                         /*
3951                          * Look for the same openowner against the server.
3952                          */
3953                         LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3954                                 if (!NFSBCMP(lowp->nfsow_owner,
3955                                     owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3956                                         newnfs_copycred(&dp->nfsdl_cred, cred);
3957                                         ret = nfscl_moveopen(vp, clp, nmp, lop,
3958                                             owp, dp, cred, p);
3959                                         if (ret == NFSERR_STALECLIENTID ||
3960                                             ret == NFSERR_STALEDONTRECOVER ||
3961                                             ret == NFSERR_BADSESSION) {
3962                                                 if (gotvp)
3963                                                         vrele(vp);
3964                                                 return (ret);
3965                                         }
3966                                         if (ret) {
3967                                                 nfscl_freeopen(lop, 1);
3968                                                 if (!error)
3969                                                         error = ret;
3970                                         }
3971                                         break;
3972                                 }
3973                         }
3974
3975                         /*
3976                          * If no openowner found, create one and get an open
3977                          * for it.
3978                          */
3979                         if (owp == NULL) {
3980                                 nowp = malloc(
3981                                     sizeof (struct nfsclowner), M_NFSCLOWNER,
3982                                     M_WAITOK);
3983                                 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
3984                                     NULL, lowp->nfsow_owner, dp->nfsdl_fh,
3985                                     dp->nfsdl_fhlen, NULL, NULL);
3986                                 newnfs_copycred(&dp->nfsdl_cred, cred);
3987                                 ret = nfscl_moveopen(vp, clp, nmp, lop,
3988                                     owp, dp, cred, p);
3989                                 if (ret) {
3990                                         nfscl_freeopenowner(owp, 0);
3991                                         if (ret == NFSERR_STALECLIENTID ||
3992                                             ret == NFSERR_STALEDONTRECOVER ||
3993                                             ret == NFSERR_BADSESSION) {
3994                                                 if (gotvp)
3995                                                         vrele(vp);
3996                                                 return (ret);
3997                                         }
3998                                         if (ret) {
3999                                                 nfscl_freeopen(lop, 1);
4000                                                 if (!error)
4001                                                         error = ret;
4002                                         }
4003                                 }
4004                         }
4005                 }
4006         }
4007
4008         /*
4009          * Now, get byte range locks for any locks done locally.
4010          */
4011         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4012                 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
4013                         newnfs_copycred(&dp->nfsdl_cred, cred);
4014                         ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
4015                         if (ret == NFSERR_STALESTATEID ||
4016                             ret == NFSERR_STALEDONTRECOVER ||
4017                             ret == NFSERR_STALECLIENTID ||
4018                             ret == NFSERR_BADSESSION) {
4019                                 if (gotvp)
4020                                         vrele(vp);
4021                                 return (ret);
4022                         }
4023                         if (ret && !error)
4024                                 error = ret;
4025                 }
4026         }
4027         if (gotvp)
4028                 vrele(vp);
4029         return (error);
4030 }
4031
4032 /*
4033  * Move a locally issued open over to an owner on the state list.
4034  * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
4035  * returns with it unlocked.
4036  */
4037 static int
4038 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4039     struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
4040     struct ucred *cred, NFSPROC_T *p)
4041 {
4042         struct nfsclopen *op, *nop;
4043         struct nfscldeleg *ndp;
4044         struct nfsnode *np;
4045         int error = 0, newone;
4046
4047         /*
4048          * First, look for an appropriate open, If found, just increment the
4049          * opencnt in it.
4050          */
4051         LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
4052                 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
4053                     op->nfso_fhlen == lop->nfso_fhlen &&
4054                     !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
4055                         op->nfso_opencnt += lop->nfso_opencnt;
4056                         nfscl_freeopen(lop, 1);
4057                         return (0);
4058                 }
4059         }
4060
4061         /* No appropriate open, so we have to do one against the server. */
4062         np = VTONFS(vp);
4063         nop = malloc(sizeof (struct nfsclopen) +
4064             lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
4065         newone = 0;
4066         nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
4067             lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
4068         ndp = dp;
4069         error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
4070             lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
4071             NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
4072         if (error) {
4073                 if (newone)
4074                         nfscl_freeopen(op, 0);
4075         } else {
4076                 op->nfso_mode |= lop->nfso_mode;
4077                 op->nfso_opencnt += lop->nfso_opencnt;
4078                 nfscl_freeopen(lop, 1);
4079         }
4080         if (nop != NULL)
4081                 free(nop, M_NFSCLOPEN);
4082         if (ndp != NULL) {
4083                 /*
4084                  * What should I do with the returned delegation, since the
4085                  * delegation is being recalled? For now, just printf and
4086                  * through it away.
4087                  */
4088                 printf("Moveopen returned deleg\n");
4089                 free(ndp, M_NFSCLDELEG);
4090         }
4091         return (error);
4092 }
4093
4094 /*
4095  * Recall all delegations on this client.
4096  */
4097 static void
4098 nfscl_totalrecall(struct nfsclclient *clp)
4099 {
4100         struct nfscldeleg *dp;
4101
4102         TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
4103                 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
4104                         dp->nfsdl_flags |= NFSCLDL_RECALL;
4105         }
4106 }
4107
4108 /*
4109  * Relock byte ranges. Called for delegation recall and state expiry.
4110  */
4111 static int
4112 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
4113     struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
4114     NFSPROC_T *p)
4115 {
4116         struct nfscllockowner *nlp;
4117         struct nfsfh *nfhp;
4118         u_int64_t off, len;
4119         int error, newone, donelocally;
4120
4121         off = lop->nfslo_first;
4122         len = lop->nfslo_end - lop->nfslo_first;
4123         error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
4124             clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
4125             lp->nfsl_openowner, &nlp, &newone, &donelocally);
4126         if (error || donelocally)
4127                 return (error);
4128         nfhp = VTONFS(vp)->n_fhp;
4129         error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
4130             nfhp->nfh_len, nlp, newone, 0, off,
4131             len, lop->nfslo_type, cred, p);
4132         if (error)
4133                 nfscl_freelockowner(nlp, 0);
4134         return (error);
4135 }
4136
4137 /*
4138  * Called to re-open a file. Basically get a vnode for the file handle
4139  * and then call nfsrpc_openrpc() to do the rest.
4140  */
4141 static int
4142 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
4143     u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
4144     struct ucred *cred, NFSPROC_T *p)
4145 {
4146         struct nfsnode *np;
4147         vnode_t vp;
4148         int error;
4149
4150         error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
4151         if (error)
4152                 return (error);
4153         vp = NFSTOV(np);
4154         if (np->n_v4 != NULL) {
4155                 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
4156                     np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
4157                     NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
4158                     cred, p);
4159         } else {
4160                 error = EINVAL;
4161         }
4162         vrele(vp);
4163         return (error);
4164 }
4165
4166 /*
4167  * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
4168  * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
4169  * fail.
4170  */
4171 static int
4172 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4173     u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
4174     u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
4175     int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
4176 {
4177         int error;
4178
4179         do {
4180                 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
4181                     mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
4182                     0, 0);
4183                 if (error == NFSERR_DELAY)
4184                         (void) nfs_catnap(PZERO, error, "nfstryop");
4185         } while (error == NFSERR_DELAY);
4186         if (error == EAUTH || error == EACCES) {
4187                 /* Try again using system credentials */
4188                 newnfs_setroot(cred);
4189                 do {
4190                     error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
4191                         newfhlen, mode, op, name, namelen, ndpp, reclaim,
4192                         delegtype, cred, p, 1, 0);
4193                     if (error == NFSERR_DELAY)
4194                         (void) nfs_catnap(PZERO, error, "nfstryop");
4195                 } while (error == NFSERR_DELAY);
4196         }
4197         return (error);
4198 }
4199
4200 /*
4201  * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
4202  * NFSERR_DELAY. Also, retry with system credentials, if the provided
4203  * cred don't work.
4204  */
4205 static int
4206 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
4207     int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
4208     u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
4209 {
4210         struct nfsrv_descript nfsd, *nd = &nfsd;
4211         int error;
4212
4213         do {
4214                 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
4215                     reclaim, off, len, type, cred, p, 0);
4216                 if (!error && nd->nd_repstat == NFSERR_DELAY)
4217                         (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4218                             "nfstrylck");
4219         } while (!error && nd->nd_repstat == NFSERR_DELAY);
4220         if (!error)
4221                 error = nd->nd_repstat;
4222         if (error == EAUTH || error == EACCES) {
4223                 /* Try again using root credentials */
4224                 newnfs_setroot(cred);
4225                 do {
4226                         error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
4227                             newone, reclaim, off, len, type, cred, p, 1);
4228                         if (!error && nd->nd_repstat == NFSERR_DELAY)
4229                                 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
4230                                     "nfstrylck");
4231                 } while (!error && nd->nd_repstat == NFSERR_DELAY);
4232                 if (!error)
4233                         error = nd->nd_repstat;
4234         }
4235         return (error);
4236 }
4237
4238 /*
4239  * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
4240  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4241  * credentials fail.
4242  */
4243 static int
4244 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
4245     struct nfsmount *nmp, NFSPROC_T *p)
4246 {
4247         int error;
4248
4249         do {
4250                 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
4251                 if (error == NFSERR_DELAY)
4252                         (void) nfs_catnap(PZERO, error, "nfstrydp");
4253         } while (error == NFSERR_DELAY);
4254         if (error == EAUTH || error == EACCES) {
4255                 /* Try again using system credentials */
4256                 newnfs_setroot(cred);
4257                 do {
4258                         error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
4259                         if (error == NFSERR_DELAY)
4260                                 (void) nfs_catnap(PZERO, error, "nfstrydp");
4261                 } while (error == NFSERR_DELAY);
4262         }
4263         return (error);
4264 }
4265
4266 /*
4267  * Try a close against the server. Just call nfsrpc_closerpc(),
4268  * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
4269  * credentials fail.
4270  */
4271 APPLESTATIC int
4272 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
4273     struct nfsmount *nmp, NFSPROC_T *p)
4274 {
4275         struct nfsrv_descript nfsd, *nd = &nfsd;
4276         int error;
4277
4278         do {
4279                 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
4280                 if (error == NFSERR_DELAY)
4281                         (void) nfs_catnap(PZERO, error, "nfstrycl");
4282         } while (error == NFSERR_DELAY);
4283         if (error == EAUTH || error == EACCES) {
4284                 /* Try again using system credentials */
4285                 newnfs_setroot(cred);
4286                 do {
4287                         error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
4288                         if (error == NFSERR_DELAY)
4289                                 (void) nfs_catnap(PZERO, error, "nfstrycl");
4290                 } while (error == NFSERR_DELAY);
4291         }
4292         return (error);
4293 }
4294
4295 /*
4296  * Decide if a delegation on a file permits close without flushing writes
4297  * to the server. This might be a big performance win in some environments.
4298  * (Not useful until the client does caching on local stable storage.)
4299  */
4300 APPLESTATIC int
4301 nfscl_mustflush(vnode_t vp)
4302 {
4303         struct nfsclclient *clp;
4304         struct nfscldeleg *dp;
4305         struct nfsnode *np;
4306         struct nfsmount *nmp;
4307
4308         np = VTONFS(vp);
4309         nmp = VFSTONFS(vnode_mount(vp));
4310         if (!NFSHASNFSV4(nmp))
4311                 return (1);
4312         NFSLOCKCLSTATE();
4313         clp = nfscl_findcl(nmp);
4314         if (clp == NULL) {
4315                 NFSUNLOCKCLSTATE();
4316                 return (1);
4317         }
4318         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4319         if (dp != NULL && (dp->nfsdl_flags &
4320             (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
4321              NFSCLDL_WRITE &&
4322             (dp->nfsdl_sizelimit >= np->n_size ||
4323              !NFSHASSTRICT3530(nmp))) {
4324                 NFSUNLOCKCLSTATE();
4325                 return (0);
4326         }
4327         NFSUNLOCKCLSTATE();
4328         return (1);
4329 }
4330
4331 /*
4332  * See if a (write) delegation exists for this file.
4333  */
4334 APPLESTATIC int
4335 nfscl_nodeleg(vnode_t vp, int writedeleg)
4336 {
4337         struct nfsclclient *clp;
4338         struct nfscldeleg *dp;
4339         struct nfsnode *np;
4340         struct nfsmount *nmp;
4341
4342         np = VTONFS(vp);
4343         nmp = VFSTONFS(vnode_mount(vp));
4344         if (!NFSHASNFSV4(nmp))
4345                 return (1);
4346         NFSLOCKCLSTATE();
4347         clp = nfscl_findcl(nmp);
4348         if (clp == NULL) {
4349                 NFSUNLOCKCLSTATE();
4350                 return (1);
4351         }
4352         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4353         if (dp != NULL &&
4354             (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
4355             (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
4356              NFSCLDL_WRITE)) {
4357                 NFSUNLOCKCLSTATE();
4358                 return (0);
4359         }
4360         NFSUNLOCKCLSTATE();
4361         return (1);
4362 }
4363
4364 /*
4365  * Look for an associated delegation that should be DelegReturned.
4366  */
4367 APPLESTATIC int
4368 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
4369 {
4370         struct nfsclclient *clp;
4371         struct nfscldeleg *dp;
4372         struct nfsclowner *owp;
4373         struct nfscllockowner *lp;
4374         struct nfsmount *nmp;
4375         struct ucred *cred;
4376         struct nfsnode *np;
4377         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4378
4379         nmp = VFSTONFS(vnode_mount(vp));
4380         np = VTONFS(vp);
4381         NFSLOCKCLSTATE();
4382         /*
4383          * Loop around waiting for:
4384          * - outstanding I/O operations on delegations to complete
4385          * - for a delegation on vp that has state, lock the client and
4386          *   do a recall
4387          * - return delegation with no state
4388          */
4389         while (1) {
4390                 clp = nfscl_findcl(nmp);
4391                 if (clp == NULL) {
4392                         NFSUNLOCKCLSTATE();
4393                         return (retcnt);
4394                 }
4395                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4396                     np->n_fhp->nfh_len);
4397                 if (dp != NULL) {
4398                     /*
4399                      * Wait for outstanding I/O ops to be done.
4400                      */
4401                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4402                         if (igotlock) {
4403                             nfsv4_unlock(&clp->nfsc_lock, 0);
4404                             igotlock = 0;
4405                         }
4406                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4407                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4408                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4409                         continue;
4410                     }
4411                     needsrecall = 0;
4412                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4413                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4414                             needsrecall = 1;
4415                             break;
4416                         }
4417                     }
4418                     if (!needsrecall) {
4419                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4420                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4421                                 needsrecall = 1;
4422                                 break;
4423                             }
4424                         }
4425                     }
4426                     if (needsrecall && !triedrecall) {
4427                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4428                         islept = 0;
4429                         while (!igotlock) {
4430                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4431                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4432                             if (islept)
4433                                 break;
4434                         }
4435                         if (islept)
4436                             continue;
4437                         NFSUNLOCKCLSTATE();
4438                         cred = newnfs_getcred();
4439                         newnfs_copycred(&dp->nfsdl_cred, cred);
4440                         (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
4441                         NFSFREECRED(cred);
4442                         triedrecall = 1;
4443                         NFSLOCKCLSTATE();
4444                         nfsv4_unlock(&clp->nfsc_lock, 0);
4445                         igotlock = 0;
4446                         continue;
4447                     }
4448                     *stp = dp->nfsdl_stateid;
4449                     retcnt = 1;
4450                     nfscl_cleandeleg(dp);
4451                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4452                 }
4453                 if (igotlock)
4454                     nfsv4_unlock(&clp->nfsc_lock, 0);
4455                 NFSUNLOCKCLSTATE();
4456                 return (retcnt);
4457         }
4458 }
4459
4460 /*
4461  * Look for associated delegation(s) that should be DelegReturned.
4462  */
4463 APPLESTATIC int
4464 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
4465     nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
4466 {
4467         struct nfsclclient *clp;
4468         struct nfscldeleg *dp;
4469         struct nfsclowner *owp;
4470         struct nfscllockowner *lp;
4471         struct nfsmount *nmp;
4472         struct ucred *cred;
4473         struct nfsnode *np;
4474         int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
4475
4476         nmp = VFSTONFS(vnode_mount(fvp));
4477         *gotfdp = 0;
4478         *gottdp = 0;
4479         NFSLOCKCLSTATE();
4480         /*
4481          * Loop around waiting for:
4482          * - outstanding I/O operations on delegations to complete
4483          * - for a delegation on fvp that has state, lock the client and
4484          *   do a recall
4485          * - return delegation(s) with no state.
4486          */
4487         while (1) {
4488                 clp = nfscl_findcl(nmp);
4489                 if (clp == NULL) {
4490                         NFSUNLOCKCLSTATE();
4491                         return (retcnt);
4492                 }
4493                 np = VTONFS(fvp);
4494                 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4495                     np->n_fhp->nfh_len);
4496                 if (dp != NULL && *gotfdp == 0) {
4497                     /*
4498                      * Wait for outstanding I/O ops to be done.
4499                      */
4500                     if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4501                         if (igotlock) {
4502                             nfsv4_unlock(&clp->nfsc_lock, 0);
4503                             igotlock = 0;
4504                         }
4505                         dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4506                         (void) nfsmsleep(&dp->nfsdl_rwlock,
4507                             NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4508                         continue;
4509                     }
4510                     needsrecall = 0;
4511                     LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4512                         if (!LIST_EMPTY(&owp->nfsow_open)) {
4513                             needsrecall = 1;
4514                             break;
4515                         }
4516                     }
4517                     if (!needsrecall) {
4518                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4519                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4520                                 needsrecall = 1;
4521                                 break;
4522                             }
4523                         }
4524                     }
4525                     if (needsrecall && !triedrecall) {
4526                         dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4527                         islept = 0;
4528                         while (!igotlock) {
4529                             igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4530                                 &islept, NFSCLSTATEMUTEXPTR, NULL);
4531                             if (islept)
4532                                 break;
4533                         }
4534                         if (islept)
4535                             continue;
4536                         NFSUNLOCKCLSTATE();
4537                         cred = newnfs_getcred();
4538                         newnfs_copycred(&dp->nfsdl_cred, cred);
4539                         (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
4540                         NFSFREECRED(cred);
4541                         triedrecall = 1;
4542                         NFSLOCKCLSTATE();
4543                         nfsv4_unlock(&clp->nfsc_lock, 0);
4544                         igotlock = 0;
4545                         continue;
4546                     }
4547                     *fstp = dp->nfsdl_stateid;
4548                     retcnt++;
4549                     *gotfdp = 1;
4550                     nfscl_cleandeleg(dp);
4551                     nfscl_freedeleg(&clp->nfsc_deleg, dp);
4552                 }
4553                 if (igotlock) {
4554                     nfsv4_unlock(&clp->nfsc_lock, 0);
4555                     igotlock = 0;
4556                 }
4557                 if (tvp != NULL) {
4558                     np = VTONFS(tvp);
4559                     dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4560                         np->n_fhp->nfh_len);
4561                     if (dp != NULL && *gottdp == 0) {
4562                         /*
4563                          * Wait for outstanding I/O ops to be done.
4564                          */
4565                         if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4566                             dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4567                             (void) nfsmsleep(&dp->nfsdl_rwlock,
4568                                 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4569                             continue;
4570                         }
4571                         LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4572                             if (!LIST_EMPTY(&owp->nfsow_open)) {
4573                                 NFSUNLOCKCLSTATE();
4574                                 return (retcnt);
4575                             }
4576                         }
4577                         LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4578                             if (!LIST_EMPTY(&lp->nfsl_lock)) {
4579                                 NFSUNLOCKCLSTATE();
4580                                 return (retcnt);
4581                             }
4582                         }
4583                         *tstp = dp->nfsdl_stateid;
4584                         retcnt++;
4585                         *gottdp = 1;
4586                         nfscl_cleandeleg(dp);
4587                         nfscl_freedeleg(&clp->nfsc_deleg, dp);
4588                     }
4589                 }
4590                 NFSUNLOCKCLSTATE();
4591                 return (retcnt);
4592         }
4593 }
4594
4595 /*
4596  * Get a reference on the clientid associated with the mount point.
4597  * Return 1 if success, 0 otherwise.
4598  */
4599 APPLESTATIC int
4600 nfscl_getref(struct nfsmount *nmp)
4601 {
4602         struct nfsclclient *clp;
4603
4604         NFSLOCKCLSTATE();
4605         clp = nfscl_findcl(nmp);
4606         if (clp == NULL) {
4607                 NFSUNLOCKCLSTATE();
4608                 return (0);
4609         }
4610         nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
4611         NFSUNLOCKCLSTATE();
4612         return (1);
4613 }
4614
4615 /*
4616  * Release a reference on a clientid acquired with the above call.
4617  */
4618 APPLESTATIC void
4619 nfscl_relref(struct nfsmount *nmp)
4620 {
4621         struct nfsclclient *clp;
4622
4623         NFSLOCKCLSTATE();
4624         clp = nfscl_findcl(nmp);
4625         if (clp == NULL) {
4626                 NFSUNLOCKCLSTATE();
4627                 return;
4628         }
4629         nfsv4_relref(&clp->nfsc_lock);
4630         NFSUNLOCKCLSTATE();
4631 }
4632
4633 /*
4634  * Save the size attribute in the delegation, since the nfsnode
4635  * is going away.
4636  */
4637 APPLESTATIC void
4638 nfscl_reclaimnode(vnode_t vp)
4639 {
4640         struct nfsclclient *clp;
4641         struct nfscldeleg *dp;
4642         struct nfsnode *np = VTONFS(vp);
4643         struct nfsmount *nmp;
4644
4645         nmp = VFSTONFS(vnode_mount(vp));
4646         if (!NFSHASNFSV4(nmp))
4647                 return;
4648         NFSLOCKCLSTATE();
4649         clp = nfscl_findcl(nmp);
4650         if (clp == NULL) {
4651                 NFSUNLOCKCLSTATE();
4652                 return;
4653         }
4654         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4655         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4656                 dp->nfsdl_size = np->n_size;
4657         NFSUNLOCKCLSTATE();
4658 }
4659
4660 /*
4661  * Get the saved size attribute in the delegation, since it is a
4662  * newly allocated nfsnode.
4663  */
4664 APPLESTATIC void
4665 nfscl_newnode(vnode_t vp)
4666 {
4667         struct nfsclclient *clp;
4668         struct nfscldeleg *dp;
4669         struct nfsnode *np = VTONFS(vp);
4670         struct nfsmount *nmp;
4671
4672         nmp = VFSTONFS(vnode_mount(vp));
4673         if (!NFSHASNFSV4(nmp))
4674                 return;
4675         NFSLOCKCLSTATE();
4676         clp = nfscl_findcl(nmp);
4677         if (clp == NULL) {
4678                 NFSUNLOCKCLSTATE();
4679                 return;
4680         }
4681         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4682         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4683                 np->n_size = dp->nfsdl_size;
4684         NFSUNLOCKCLSTATE();
4685 }
4686
4687 /*
4688  * If there is a valid write delegation for this file, set the modtime
4689  * to the local clock time.
4690  */
4691 APPLESTATIC void
4692 nfscl_delegmodtime(vnode_t vp)
4693 {
4694         struct nfsclclient *clp;
4695         struct nfscldeleg *dp;
4696         struct nfsnode *np = VTONFS(vp);
4697         struct nfsmount *nmp;
4698
4699         nmp = VFSTONFS(vnode_mount(vp));
4700         if (!NFSHASNFSV4(nmp))
4701                 return;
4702         NFSLOCKCLSTATE();
4703         clp = nfscl_findcl(nmp);
4704         if (clp == NULL) {
4705                 NFSUNLOCKCLSTATE();
4706                 return;
4707         }
4708         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4709         if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
4710                 nanotime(&dp->nfsdl_modtime);
4711                 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
4712         }
4713         NFSUNLOCKCLSTATE();
4714 }
4715
4716 /*
4717  * If there is a valid write delegation for this file with a modtime set,
4718  * put that modtime in mtime.
4719  */
4720 APPLESTATIC void
4721 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
4722 {
4723         struct nfsclclient *clp;
4724         struct nfscldeleg *dp;
4725         struct nfsnode *np = VTONFS(vp);
4726         struct nfsmount *nmp;
4727
4728         nmp = VFSTONFS(vnode_mount(vp));
4729         if (!NFSHASNFSV4(nmp))
4730                 return;
4731         NFSLOCKCLSTATE();
4732         clp = nfscl_findcl(nmp);
4733         if (clp == NULL) {
4734                 NFSUNLOCKCLSTATE();
4735                 return;
4736         }
4737         dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4738         if (dp != NULL &&
4739             (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
4740             (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
4741                 *mtime = dp->nfsdl_modtime;
4742         NFSUNLOCKCLSTATE();
4743 }
4744
4745 static int
4746 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
4747 {
4748         short *defaulterrp, *errp;
4749
4750         if (!nd->nd_repstat)
4751                 return (0);
4752         if (nd->nd_procnum == NFSPROC_NOOP)
4753                 return (txdr_unsigned(nd->nd_repstat & 0xffff));
4754         if (nd->nd_repstat == EBADRPC)
4755                 return (txdr_unsigned(NFSERR_BADXDR));
4756         if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
4757             nd->nd_repstat == NFSERR_OPILLEGAL)
4758                 return (txdr_unsigned(nd->nd_repstat));
4759         if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
4760             minorvers > NFSV4_MINORVERSION) {
4761                 /* NFSv4.n error. */
4762                 return (txdr_unsigned(nd->nd_repstat));
4763         }
4764         if (nd->nd_procnum < NFSV4OP_CBNOPS)
4765                 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
4766         else
4767                 return (txdr_unsigned(nd->nd_repstat));
4768         while (*++errp)
4769                 if (*errp == (short)nd->nd_repstat)
4770                         return (txdr_unsigned(nd->nd_repstat));
4771         return (txdr_unsigned(*defaulterrp));
4772 }
4773
4774 /*
4775  * Called to find/add a layout to a client.
4776  * This function returns the layout with a refcnt (shared lock) upon
4777  * success (returns 0) or with no lock/refcnt on the layout when an
4778  * error is returned.
4779  * If a layout is passed in via lypp, it is locked (exclusively locked).
4780  */
4781 APPLESTATIC int
4782 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
4783     nfsv4stateid_t *stateidp, int layouttype, int retonclose,
4784     struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
4785     struct ucred *cred, NFSPROC_T *p)
4786 {
4787         struct nfsclclient *clp;
4788         struct nfscllayout *lyp, *tlyp;
4789         struct nfsclflayout *flp;
4790         struct nfsnode *np = VTONFS(vp);
4791         mount_t mp;
4792         int layout_passed_in;
4793
4794         mp = nmp->nm_mountp;
4795         layout_passed_in = 1;
4796         tlyp = NULL;
4797         lyp = *lypp;
4798         if (lyp == NULL) {
4799                 layout_passed_in = 0;
4800                 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
4801                     M_WAITOK | M_ZERO);
4802         }
4803
4804         NFSLOCKCLSTATE();
4805         clp = nmp->nm_clp;
4806         if (clp == NULL) {
4807                 if (layout_passed_in != 0)
4808                         nfsv4_unlock(&lyp->nfsly_lock, 0);
4809                 NFSUNLOCKCLSTATE();
4810                 if (tlyp != NULL)
4811                         free(tlyp, M_NFSLAYOUT);
4812                 return (EPERM);
4813         }
4814         if (lyp == NULL) {
4815                 /*
4816                  * Although no lyp was passed in, another thread might have
4817                  * allocated one. If one is found, just increment it's ref
4818                  * count and return it.
4819                  */
4820                 lyp = nfscl_findlayout(clp, fhp, fhlen);
4821                 if (lyp == NULL) {
4822                         lyp = tlyp;
4823                         tlyp = NULL;
4824                         lyp->nfsly_stateid.seqid = stateidp->seqid;
4825                         lyp->nfsly_stateid.other[0] = stateidp->other[0];
4826                         lyp->nfsly_stateid.other[1] = stateidp->other[1];
4827                         lyp->nfsly_stateid.other[2] = stateidp->other[2];
4828                         lyp->nfsly_lastbyte = 0;
4829                         LIST_INIT(&lyp->nfsly_flayread);
4830                         LIST_INIT(&lyp->nfsly_flayrw);
4831                         LIST_INIT(&lyp->nfsly_recall);
4832                         lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
4833                         lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
4834                         lyp->nfsly_clp = clp;
4835                         if (layouttype == NFSLAYOUT_FLEXFILE)
4836                                 lyp->nfsly_flags = NFSLY_FLEXFILE;
4837                         else
4838                                 lyp->nfsly_flags = NFSLY_FILES;
4839                         if (retonclose != 0)
4840                                 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
4841                         lyp->nfsly_fhlen = fhlen;
4842                         NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
4843                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4844                         LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
4845                             nfsly_hash);
4846                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4847                         nfscl_layoutcnt++;
4848                 } else {
4849                         if (retonclose != 0)
4850                                 lyp->nfsly_flags |= NFSLY_RETONCLOSE;
4851                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4852                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4853                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4854                 }
4855                 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
4856                 if (NFSCL_FORCEDISM(mp)) {
4857                         NFSUNLOCKCLSTATE();
4858                         if (tlyp != NULL)
4859                                 free(tlyp, M_NFSLAYOUT);
4860                         return (EPERM);
4861                 }
4862                 *lypp = lyp;
4863         } else
4864                 lyp->nfsly_stateid.seqid = stateidp->seqid;
4865
4866         /* Merge the new list of File Layouts into the list. */
4867         flp = LIST_FIRST(fhlp);
4868         if (flp != NULL) {
4869                 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
4870                         nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
4871                 else
4872                         nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
4873         }
4874         if (layout_passed_in != 0)
4875                 nfsv4_unlock(&lyp->nfsly_lock, 1);
4876         NFSUNLOCKCLSTATE();
4877         if (tlyp != NULL)
4878                 free(tlyp, M_NFSLAYOUT);
4879         return (0);
4880 }
4881
4882 /*
4883  * Search for a layout by MDS file handle.
4884  * If one is found, it is returned with a refcnt (shared lock) iff
4885  * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
4886  * returned NULL.
4887  */
4888 struct nfscllayout *
4889 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
4890     uint64_t off, struct nfsclflayout **retflpp, int *recalledp)
4891 {
4892         struct nfscllayout *lyp;
4893         mount_t mp;
4894         int error, igotlock;
4895
4896         mp = clp->nfsc_nmp->nm_mountp;
4897         *recalledp = 0;
4898         *retflpp = NULL;
4899         NFSLOCKCLSTATE();
4900         lyp = nfscl_findlayout(clp, fhp, fhlen);
4901         if (lyp != NULL) {
4902                 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
4903                         TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
4904                         TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
4905                         lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
4906                         error = nfscl_findlayoutforio(lyp, off,
4907                             NFSV4OPEN_ACCESSREAD, retflpp);
4908                         if (error == 0)
4909                                 nfsv4_getref(&lyp->nfsly_lock, NULL,
4910                                     NFSCLSTATEMUTEXPTR, mp);
4911                         else {
4912                                 do {
4913                                         igotlock = nfsv4_lock(&lyp->nfsly_lock,
4914                                             1, NULL, NFSCLSTATEMUTEXPTR, mp);
4915                                 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
4916                                 *retflpp = NULL;
4917                         }
4918                         if (NFSCL_FORCEDISM(mp)) {
4919                                 lyp = NULL;
4920                                 *recalledp = 1;
4921                         }
4922                 } else {
4923                         lyp = NULL;
4924                         *recalledp = 1;
4925                 }
4926         }
4927         NFSUNLOCKCLSTATE();
4928         return (lyp);
4929 }
4930
4931 /*
4932  * Search for a layout by MDS file handle. If one is found, mark in to be
4933  * recalled, if it already marked "return on close".
4934  */
4935 static void
4936 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
4937     int fhlen, struct nfsclrecalllayout **recallpp)
4938 {
4939         struct nfscllayout *lyp;
4940         uint32_t iomode;
4941
4942         if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) ||
4943             nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
4944             (VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
4945                 return;
4946         lyp = nfscl_findlayout(clp, fhp, fhlen);
4947         if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE |
4948             NFSLY_RECALL)) == NFSLY_RETONCLOSE) {
4949                 iomode = 0;
4950                 if (!LIST_EMPTY(&lyp->nfsly_flayread))
4951                         iomode |= NFSLAYOUTIOMODE_READ;
4952                 if (!LIST_EMPTY(&lyp->nfsly_flayrw))
4953                         iomode |= NFSLAYOUTIOMODE_RW;
4954                 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
4955                     0, UINT64_MAX, lyp->nfsly_stateid.seqid, *recallpp);
4956                 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
4957                 *recallpp = NULL;
4958         }
4959 }
4960
4961 /*
4962  * Dereference a layout.
4963  */
4964 void
4965 nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
4966 {
4967
4968         NFSLOCKCLSTATE();
4969         if (exclocked != 0)
4970                 nfsv4_unlock(&lyp->nfsly_lock, 0);
4971         else
4972                 nfsv4_relref(&lyp->nfsly_lock);
4973         NFSUNLOCKCLSTATE();
4974 }
4975
4976 /*
4977  * Search for a devinfo by deviceid. If one is found, return it after
4978  * acquiring a reference count on it.
4979  */
4980 struct nfscldevinfo *
4981 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
4982     struct nfscldevinfo *dip)
4983 {
4984
4985         NFSLOCKCLSTATE();
4986         if (dip == NULL)
4987                 dip = nfscl_finddevinfo(clp, deviceid);
4988         if (dip != NULL)
4989                 dip->nfsdi_refcnt++;
4990         NFSUNLOCKCLSTATE();
4991         return (dip);
4992 }
4993
4994 /*
4995  * Dereference a devinfo structure.
4996  */
4997 static void
4998 nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
4999 {
5000
5001         dip->nfsdi_refcnt--;
5002         if (dip->nfsdi_refcnt == 0)
5003                 wakeup(&dip->nfsdi_refcnt);
5004 }
5005
5006 /*
5007  * Dereference a devinfo structure.
5008  */
5009 void
5010 nfscl_reldevinfo(struct nfscldevinfo *dip)
5011 {
5012
5013         NFSLOCKCLSTATE();
5014         nfscl_reldevinfo_locked(dip);
5015         NFSUNLOCKCLSTATE();
5016 }
5017
5018 /*
5019  * Find a layout for this file handle. Return NULL upon failure.
5020  */
5021 static struct nfscllayout *
5022 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
5023 {
5024         struct nfscllayout *lyp;
5025
5026         LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
5027                 if (lyp->nfsly_fhlen == fhlen &&
5028                     !NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
5029                         break;
5030         return (lyp);
5031 }
5032
5033 /*
5034  * Find a devinfo for this deviceid. Return NULL upon failure.
5035  */
5036 static struct nfscldevinfo *
5037 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
5038 {
5039         struct nfscldevinfo *dip;
5040
5041         LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
5042                 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
5043                     == 0)
5044                         break;
5045         return (dip);
5046 }
5047
5048 /*
5049  * Merge the new file layout list into the main one, maintaining it in
5050  * increasing offset order.
5051  */
5052 static void
5053 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
5054     struct nfsclflayouthead *newfhlp)
5055 {
5056         struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
5057
5058         flp = LIST_FIRST(fhlp);
5059         prevflp = NULL;
5060         LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
5061                 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
5062                         prevflp = flp;
5063                         flp = LIST_NEXT(flp, nfsfl_list);
5064                 }
5065                 if (prevflp == NULL)
5066                         LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
5067                 else
5068                         LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
5069                 prevflp = nflp;
5070         }
5071 }
5072
5073 /*
5074  * Add this nfscldevinfo to the client, if it doesn't already exist.
5075  * This function consumes the structure pointed at by dip, if not NULL.
5076  */
5077 APPLESTATIC int
5078 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip,
5079     struct nfsclflayout *flp)
5080 {
5081         struct nfsclclient *clp;
5082         struct nfscldevinfo *tdip;
5083         uint8_t *dev;
5084
5085         NFSLOCKCLSTATE();
5086         clp = nmp->nm_clp;
5087         if (clp == NULL) {
5088                 NFSUNLOCKCLSTATE();
5089                 if (dip != NULL)
5090                         free(dip, M_NFSDEVINFO);
5091                 return (ENODEV);
5092         }
5093         if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5094                 dev = flp->nfsfl_dev;
5095         else
5096                 dev = flp->nfsfl_ffm[0].dev;
5097         tdip = nfscl_finddevinfo(clp, dev);
5098         if (tdip != NULL) {
5099                 tdip->nfsdi_layoutrefs++;
5100                 flp->nfsfl_devp = tdip;
5101                 nfscl_reldevinfo_locked(tdip);
5102                 NFSUNLOCKCLSTATE();
5103                 if (dip != NULL)
5104                         free(dip, M_NFSDEVINFO);
5105                 return (0);
5106         }
5107         if (dip != NULL) {
5108                 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
5109                 dip->nfsdi_layoutrefs = 1;
5110                 flp->nfsfl_devp = dip;
5111         }
5112         NFSUNLOCKCLSTATE();
5113         if (dip == NULL)
5114                 return (ENODEV);
5115         return (0);
5116 }
5117
5118 /*
5119  * Free up a layout structure and associated file layout structure(s).
5120  */
5121 APPLESTATIC void
5122 nfscl_freelayout(struct nfscllayout *layp)
5123 {
5124         struct nfsclflayout *flp, *nflp;
5125         struct nfsclrecalllayout *rp, *nrp;
5126
5127         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
5128                 LIST_REMOVE(flp, nfsfl_list);
5129                 nfscl_freeflayout(flp);
5130         }
5131         LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
5132                 LIST_REMOVE(flp, nfsfl_list);
5133                 nfscl_freeflayout(flp);
5134         }
5135         LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
5136                 LIST_REMOVE(rp, nfsrecly_list);
5137                 free(rp, M_NFSLAYRECALL);
5138         }
5139         nfscl_layoutcnt--;
5140         free(layp, M_NFSLAYOUT);
5141 }
5142
5143 /*
5144  * Free up a file layout structure.
5145  */
5146 APPLESTATIC void
5147 nfscl_freeflayout(struct nfsclflayout *flp)
5148 {
5149         int i, j;
5150
5151         if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
5152                 for (i = 0; i < flp->nfsfl_fhcnt; i++)
5153                         free(flp->nfsfl_fh[i], M_NFSFH);
5154         if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0)
5155                 for (i = 0; i < flp->nfsfl_mirrorcnt; i++)
5156                         for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++)
5157                                 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH);
5158         if (flp->nfsfl_devp != NULL)
5159                 flp->nfsfl_devp->nfsdi_layoutrefs--;
5160         free(flp, M_NFSFLAYOUT);
5161 }
5162
5163 /*
5164  * Free up a file layout devinfo structure.
5165  */
5166 APPLESTATIC void
5167 nfscl_freedevinfo(struct nfscldevinfo *dip)
5168 {
5169
5170         free(dip, M_NFSDEVINFO);
5171 }
5172
5173 /*
5174  * Mark any layouts that match as recalled.
5175  */
5176 static int
5177 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
5178     uint64_t off, uint64_t len, uint32_t stateseqid,
5179     struct nfsclrecalllayout *recallp)
5180 {
5181         struct nfsclrecalllayout *rp, *orp;
5182
5183         recallp->nfsrecly_recalltype = recalltype;
5184         recallp->nfsrecly_iomode = iomode;
5185         recallp->nfsrecly_stateseqid = stateseqid;
5186         recallp->nfsrecly_off = off;
5187         recallp->nfsrecly_len = len;
5188         /*
5189          * Order the list as file returns first, followed by fsid and any
5190          * returns, both in increasing stateseqid order.
5191          * Note that the seqids wrap around, so 1 is after 0xffffffff.
5192          * (I'm not sure this is correct because I find RFC5661 confusing
5193          *  on this, but hopefully it will work ok.)
5194          */
5195         orp = NULL;
5196         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5197                 orp = rp;
5198                 if ((recalltype == NFSLAYOUTRETURN_FILE &&
5199                      (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
5200                       nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
5201                     (recalltype != NFSLAYOUTRETURN_FILE &&
5202                      rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
5203                      nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
5204                         LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
5205                         break;
5206                 }
5207         }
5208         if (rp == NULL) {
5209                 if (orp == NULL)
5210                         LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
5211                             nfsrecly_list);
5212                 else
5213                         LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
5214         }
5215         lyp->nfsly_flags |= NFSLY_RECALL;
5216         return (0);
5217 }
5218
5219 /*
5220  * Compare the two seqids for ordering. The trick is that the seqids can
5221  * wrap around from 0xffffffff->0, so check for the cases where one
5222  * has wrapped around.
5223  * Return 1 if seqid1 comes before seqid2, 0 otherwise.
5224  */
5225 static int
5226 nfscl_seq(uint32_t seqid1, uint32_t seqid2)
5227 {
5228
5229         if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
5230                 /* seqid2 has wrapped around. */
5231                 return (0);
5232         if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
5233                 /* seqid1 has wrapped around. */
5234                 return (1);
5235         if (seqid1 <= seqid2)
5236                 return (1);
5237         return (0);
5238 }
5239
5240 /*
5241  * Do a layout return for each of the recalls.
5242  */
5243 static void
5244 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
5245     struct ucred *cred, NFSPROC_T *p)
5246 {
5247         struct nfsclrecalllayout *rp;
5248         nfsv4stateid_t stateid;
5249         int layouttype;
5250
5251         NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
5252         stateid.seqid = lyp->nfsly_stateid.seqid;
5253         if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5254                 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5255         else
5256                 layouttype = NFSLAYOUT_FLEXFILE;
5257         LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
5258                 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
5259                     lyp->nfsly_fhlen, 0, layouttype,
5260                     rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
5261                     rp->nfsrecly_off, rp->nfsrecly_len,
5262                     &stateid, cred, p, NULL);
5263         }
5264 }
5265
5266 /*
5267  * Do the layout commit for a file layout.
5268  */
5269 static void
5270 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
5271     struct ucred *cred, NFSPROC_T *p)
5272 {
5273         struct nfsclflayout *flp;
5274         uint64_t len;
5275         int error, layouttype;
5276
5277         if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
5278                 layouttype = NFSLAYOUT_NFSV4_1_FILES;
5279         else
5280                 layouttype = NFSLAYOUT_FLEXFILE;
5281         LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
5282                 if (layouttype == NFSLAYOUT_FLEXFILE &&
5283                     (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) {
5284                         NFSCL_DEBUG(4, "Flex file: no layoutcommit\n");
5285                         /* If not supported, don't bother doing it. */
5286                         NFSLOCKMNT(nmp);
5287                         nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5288                         NFSUNLOCKMNT(nmp);
5289                         break;
5290                 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
5291                         len = flp->nfsfl_end - flp->nfsfl_off;
5292                         error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
5293                             lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
5294                             lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
5295                             layouttype, cred, p, NULL);
5296                         NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
5297                         if (error == NFSERR_NOTSUPP) {
5298                                 /* If not supported, don't bother doing it. */
5299                                 NFSLOCKMNT(nmp);
5300                                 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
5301                                 NFSUNLOCKMNT(nmp);
5302                                 break;
5303                         }
5304                 }
5305         }
5306 }
5307
5308 /*
5309  * Commit all layouts for a file (vnode).
5310  */
5311 int
5312 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
5313 {
5314         struct nfsclclient *clp;
5315         struct nfscllayout *lyp;
5316         struct nfsnode *np = VTONFS(vp);
5317         mount_t mp;
5318         struct nfsmount *nmp;
5319
5320         mp = vnode_mount(vp);
5321         nmp = VFSTONFS(mp);
5322         if (NFSHASNOLAYOUTCOMMIT(nmp))
5323                 return (0);
5324         NFSLOCKCLSTATE();
5325         clp = nmp->nm_clp;
5326         if (clp == NULL) {
5327                 NFSUNLOCKCLSTATE();
5328                 return (EPERM);
5329         }
5330         lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
5331         if (lyp == NULL) {
5332                 NFSUNLOCKCLSTATE();
5333                 return (EPERM);
5334         }
5335         nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
5336         if (NFSCL_FORCEDISM(mp)) {
5337                 NFSUNLOCKCLSTATE();
5338                 return (EPERM);
5339         }
5340 tryagain:
5341         if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
5342                 lyp->nfsly_flags &= ~NFSLY_WRITTEN;
5343                 NFSUNLOCKCLSTATE();
5344                 NFSCL_DEBUG(4, "do layoutcommit2\n");
5345                 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
5346                 NFSLOCKCLSTATE();
5347                 goto tryagain;
5348         }
5349         nfsv4_relref(&lyp->nfsly_lock);
5350         NFSUNLOCKCLSTATE();
5351         return (0);
5352 }
5353