src/vol/salvsync-server.c

   1 /*
   2  * Copyright 2006-2008, Sine Nomine Associates and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * salvsync-server.c
  12  *
  13  * OpenAFS demand attach fileserver
  14  * Salvage server synchronization with fileserver.
  15  */
  16
  17 /* This controls the size of an fd_set; it must be defined early before
  18  * the system headers define that type and the macros that operate on it.
  19  * Its value should be as large as the maximum file descriptor limit we
  20  * are likely to run into on any platform.  Right now, that is 65536
  21  * which is the default hard fd limit on Solaris 9 */
  22 #ifndef _WIN32
  23 #define FD_SETSIZE 65536
  24 #endif
  25
  26 #include <afsconfig.h>
  27 #include <afs/param.h>
  28
  29 #include <afs/procmgmt.h>
  30 #include <roken.h>
  31
  32 #include <stddef.h>
  33
  34 #include <afs/opr.h>
  35 #include <opr/lock.h>
  36 #include <afs/afsint.h>
  37 #include <rx/rx_queue.h>
  38
  39 #include "nfs.h"
  40 #include <afs/errors.h>
  41 #include "salvsync.h"
  42 #include "lock.h"
  43 #include <afs/afssyscalls.h>
  44 #include "ihandle.h"
  45 #include "vnode.h"
  46 #include "volume.h"
  47 #include "partition.h"
  48 #include "common.h"
  49 #include <rx/rx_queue.h>
  50
  51 #ifdef USE_UNIX_SOCKETS
  52 #include <afs/afsutil.h>
  53 #include <sys/un.h>
  54 #endif
  55
  56 #ifndef WCOREDUMP
  57 #define WCOREDUMP(x)    ((x) & 0200)
  58 #endif
  59
  60 #define MAXHANDLERS     4       /* Up to 4 clients; must be at least 2, so that
  61                                  * move = dump+restore can run on single server */
  62
  63
  64 /*
  65  * This lock controls access to the handler array.
  66  */
  67 struct Lock SALVSYNC_handler_lock;
  68
  69
  70 #ifdef AFS_DEMAND_ATTACH_FS
  71 /*
  72  * SALVSYNC is a feature specific to the demand attach fileserver
  73  */
  74
  75 /* Forward declarations */
  76 static void * SALVSYNC_syncThread(void *);
  77 static void SALVSYNC_newconnection(osi_socket fd);
  78 static void SALVSYNC_com(osi_socket fd);
  79 static void SALVSYNC_Drop(osi_socket fd);
  80 static void AcceptOn(void);
  81 static void AcceptOff(void);
  82 static void InitHandler(void);
  83 static void CallHandler(fd_set * fdsetp);
  84 static int AddHandler(osi_socket afd, void (*aproc) (int));
  85 static int FindHandler(osi_socket afd);
  86 static int FindHandler_r(osi_socket afd);
  87 static int RemoveHandler(osi_socket afd);
  88 static void GetHandler(fd_set * fdsetp, int *maxfdp);
  89
  90 static int AllocNode(struct SalvageQueueNode ** node);
  91
  92 static int AddToSalvageQueue(struct SalvageQueueNode * node);
  93 static void DeleteFromSalvageQueue(struct SalvageQueueNode * node);
  94 static void AddToPendingQueue(struct SalvageQueueNode * node);
  95 static void DeleteFromPendingQueue(struct SalvageQueueNode * node);
  96 static struct SalvageQueueNode * LookupPendingCommandByPid(int pid);
  97 static void UpdateCommandPrio(struct SalvageQueueNode * node);
  98 static void HandlePrio(struct SalvageQueueNode * clone,
  99                        struct SalvageQueueNode * parent,
 100                        afs_uint32 new_prio);
 101
 102 static int LinkNode(struct SalvageQueueNode * parent,
 103                     struct SalvageQueueNode * clone);
 104
 105 static struct SalvageQueueNode * LookupNode(VolumeId vid, char * partName,
 106                                             struct SalvageQueueNode ** parent);
 107 static struct SalvageQueueNode * LookupNodeByCommand(SALVSYNC_command_hdr * qry,
 108                                                      struct SalvageQueueNode ** parent);
 109 static void AddNodeToHash(struct SalvageQueueNode * node);
 110
 111 static afs_int32 SALVSYNC_com_Salvage(SALVSYNC_command * com, SALVSYNC_response * res);
 112 static afs_int32 SALVSYNC_com_Cancel(SALVSYNC_command * com, SALVSYNC_response * res);
 113 static afs_int32 SALVSYNC_com_Query(SALVSYNC_command * com, SALVSYNC_response * res);
 114 static afs_int32 SALVSYNC_com_CancelAll(SALVSYNC_command * com, SALVSYNC_response * res);
 115 static afs_int32 SALVSYNC_com_Link(SALVSYNC_command * com, SALVSYNC_response * res);
 116
 117
 118 extern int VInit;
 119 extern pthread_mutex_t vol_salvsync_mutex;
 120
 121 /**
 122  * salvsync server socket handle.
 123  */
 124 static SYNC_server_state_t salvsync_server_state =
 125     { OSI_NULLSOCKET,                       /* file descriptor */
 126       SALVSYNC_ENDPOINT_DECL,   /* server endpoint */
 127       SALVSYNC_PROTO_VERSION,   /* protocol version */
 128       5,                        /* bind() retry limit */
 129       100,                      /* listen() queue depth */
 130       "SALVSYNC",               /* protocol name string */
 131     };
 132
 133
 134 /**
 135  * queue of all volumes waiting to be salvaged.
 136  */
 137 struct SalvageQueue {
 138     volatile int total_len;
 139     volatile afs_int32 last_insert;    /**< id of last partition to have a salvage node inserted */
 140     volatile int len[VOLMAXPARTS+1];
 141     volatile struct rx_queue part[VOLMAXPARTS+1]; /**< per-partition queues of pending salvages */
 142     pthread_cond_t cv;
 143 };
 144 static struct SalvageQueue salvageQueue;  /* volumes waiting to be salvaged */
 145
 146 /**
 147  * queue of all volumes currently being salvaged.
 148  */
 149 struct QueueHead {
 150     volatile struct rx_queue q;  /**< queue of salvages in progress */
 151     volatile int len;            /**< length of in-progress queue */
 152     pthread_cond_t queue_change_cv;
 153 };
 154 static struct QueueHead pendingQueue;  /* volumes being salvaged */
 155
 156 /* XXX
 157  * whether a partition has a salvage in progress
 158  *
 159  * the salvager code only permits one salvage per partition at a time
 160  *
 161  * the following hack tries to keep salvaged parallelism high by
 162  * only permitting one salvage dispatch per partition at a time
 163  *
 164  * unfortunately, the parallel salvager currently
 165  * has a rather braindead routine that won't permit
 166  * multiple salvages on the same "device".  this
 167  * function happens to break pretty badly on lvm, raid luns, etc.
 168  *
 169  * this hack isn't good enough to stop the device limiting code from
 170  * crippling performance.  someday that code needs to be rewritten
 171  */
 172 static int partition_salvaging[VOLMAXPARTS+1];
 173
 174 static int HandlerFD[MAXHANDLERS];
 175 static void (*HandlerProc[MAXHANDLERS]) (int);
 176
 177 #define VSHASH_SIZE 64
 178 #define VSHASH_MASK (VSHASH_SIZE-1)
 179 #define VSHASH(vid) ((vid)&VSHASH_MASK)
 180
 181 static struct QueueHead  SalvageHashTable[VSHASH_SIZE];
 182
 183 static struct SalvageQueueNode *
 184 LookupNode(VolumeId vid, char * partName,
 185            struct SalvageQueueNode ** parent)
 186 {
 187     struct rx_queue *qp, *nqp;
 188     struct SalvageQueueNode *vsp = NULL;
 189     int idx = VSHASH(vid);
 190
 191     for (queue_Scan(&SalvageHashTable[idx], qp, nqp, rx_queue)) {
 192         vsp = (struct SalvageQueueNode *)((char *)qp - offsetof(struct SalvageQueueNode, hash_chain));
 193         if ((vsp->command.sop.volume == vid) &&
 194             !strncmp(vsp->command.sop.partName, partName, sizeof(vsp->command.sop.partName))) {
 195             break;
 196         }
 197     }
 198
 199     if (queue_IsEnd(&SalvageHashTable[idx], qp)) {
 200         vsp = NULL;
 201     }
 202
 203     if (parent) {
 204         if (vsp) {
 205             *parent = (vsp->type == SALVSYNC_VOLGROUP_CLONE) ?
 206                 vsp->volgroup.parent : vsp;
 207         } else {
 208             *parent = NULL;
 209         }
 210     }
 211
 212     return vsp;
 213 }
 214
 215 static struct SalvageQueueNode *
 216 LookupNodeByCommand(SALVSYNC_command_hdr * qry,
 217                     struct SalvageQueueNode ** parent)
 218 {
 219     return LookupNode(qry->volume, qry->partName, parent);
 220 }
 221
 222 static void
 223 AddNodeToHash(struct SalvageQueueNode * node)
 224 {
 225     int idx = VSHASH(node->command.sop.volume);
 226
 227     if (queue_IsOnQueue(&node->hash_chain)) {
 228         return;
 229     }
 230
 231     queue_Append(&SalvageHashTable[idx], &node->hash_chain);
 232     SalvageHashTable[idx].len++;
 233 }
 234
 235 #if 0
 236 static void
 237 DeleteNodeFromHash(struct SalvageQueueNode * node)
 238 {
 239     int idx = VSHASH(node->command.sop.volume);
 240
 241     if (queue_IsNotOnQueue(&node->hash_chain)) {
 242         return;
 243     }
 244
 245     queue_Remove(&node->hash_chain);
 246     SalvageHashTable[idx].len--;
 247 }
 248 #endif
 249
 250 void
 251 SALVSYNC_salvInit(void)
 252 {
 253     int i;
 254     pthread_t tid;
 255     pthread_attr_t tattr;
 256
 257     /* initialize the queues */
 258     Lock_Init(&SALVSYNC_handler_lock);
 259     CV_INIT(&salvageQueue.cv, "sq", CV_DEFAULT, 0);
 260     for (i = 0; i <= VOLMAXPARTS; i++) {
 261         queue_Init(&salvageQueue.part[i]);
 262         salvageQueue.len[i] = 0;
 263     }
 264     CV_INIT(&pendingQueue.queue_change_cv, "queuechange", CV_DEFAULT, 0);
 265     queue_Init(&pendingQueue);
 266     salvageQueue.total_len = pendingQueue.len = 0;
 267     salvageQueue.last_insert = -1;
 268     memset(partition_salvaging, 0, sizeof(partition_salvaging));
 269
 270     for (i = 0; i < VSHASH_SIZE; i++) {
 271         CV_INIT(&SalvageHashTable[i].queue_change_cv, "queuechange", CV_DEFAULT, 0);
 272         SalvageHashTable[i].len = 0;
 273         queue_Init(&SalvageHashTable[i]);
 274     }
 275
 276     /* start the salvsync thread */
 277     opr_Verify(pthread_attr_init(&tattr) == 0);
 278     opr_Verify(pthread_attr_setdetachstate(&tattr,
 279                                            PTHREAD_CREATE_DETACHED) == 0);
 280     opr_Verify(pthread_create(&tid, &tattr, SALVSYNC_syncThread, NULL) == 0);
 281 }
 282
 283 static void
 284 CleanFDs(void)
 285 {
 286     int i;
 287     for (i = 0; i < MAXHANDLERS; ++i) {
 288         if (HandlerFD[i] >= 0) {
 289             SALVSYNC_Drop(HandlerFD[i]);
 290         }
 291     }
 292
 293     /* just in case we were in AcceptOff mode, and thus this fd wouldn't
 294      * have a handler */
 295     close(salvsync_server_state.fd);
 296     salvsync_server_state.fd = OSI_NULLSOCKET;
 297 }
 298
 299 static fd_set SALVSYNC_readfds;
 300
 301 static void *
 302 SALVSYNC_syncThread(void * args)
 303 {
 304     int code;
 305     SYNC_server_state_t * state = &salvsync_server_state;
 306
 307     /* when we fork, the child needs to close the salvsync server sockets,
 308      * otherwise, it may get salvsync requests, instead of the parent
 309      * salvageserver */
 310     opr_Verify(pthread_atfork(NULL, NULL, CleanFDs) == 0);
 311
 312     SYNC_getAddr(&state->endpoint, &state->addr);
 313     SYNC_cleanupSock(state);
 314
 315 #ifndef AFS_NT40_ENV
 316     (void)signal(SIGPIPE, SIG_IGN);
 317 #endif
 318
 319     state->fd = SYNC_getSock(&state->endpoint);
 320     code = SYNC_bindSock(state);
 321     opr_Assert(!code);
 322
 323     InitHandler();
 324     AcceptOn();
 325
 326     for (;;) {
 327         int maxfd;
 328         struct timeval s_timeout;
 329         GetHandler(&SALVSYNC_readfds, &maxfd);
 330         s_timeout.tv_sec = SYNC_SELECT_TIMEOUT;
 331         s_timeout.tv_usec = 0;
 332         /* Note: check for >= 1 below is essential since IOMGR_select
 333          * doesn't have exactly same semantics as select.
 334          */
 335         if (select(maxfd + 1, &SALVSYNC_readfds, NULL, NULL, &s_timeout) >= 1)
 336             CallHandler(&SALVSYNC_readfds);
 337     }
 338
 339     AFS_UNREACHED(return(NULL));
 340 }
 341
 342 static void
 343 SALVSYNC_newconnection(int afd)
 344 {
 345 #ifdef USE_UNIX_SOCKETS
 346     struct sockaddr_un other;
 347 #else  /* USE_UNIX_SOCKETS */
 348     struct sockaddr_in other;
 349 #endif
 350     int fd;
 351     socklen_t junk;
 352
 353     junk = sizeof(other);
 354     fd = accept(afd, (struct sockaddr *)&other, &junk);
 355     if (fd == OSI_NULLSOCKET) {
 356         osi_Panic("SALVSYNC_newconnection:  accept failed, errno==%d\n", errno);
 357     } else if (!AddHandler(fd, SALVSYNC_com)) {
 358         AcceptOff();
 359         opr_Verify(AddHandler(fd, SALVSYNC_com));
 360     }
 361 }
 362
 363 /* this function processes commands from an salvsync file descriptor (fd) */
 364 static afs_int32 SALV_cnt = 0;
 365 static void
 366 SALVSYNC_com(osi_socket fd)
 367 {
 368     SYNC_command com;
 369     SYNC_response res;
 370     SALVSYNC_response_hdr sres_hdr;
 371     SALVSYNC_command scom;
 372     SALVSYNC_response sres;
 373     SYNC_PROTO_BUF_DECL(buf);
 374
 375     memset(&com, 0, sizeof(com));
 376     memset(&res, 0, sizeof(res));
 377     memset(&scom, 0, sizeof(scom));
 378     memset(&sres, 0, sizeof(sres));
 379     memset(&sres_hdr, 0, sizeof(sres_hdr));
 380
 381     com.payload.buf = (void *)buf;
 382     com.payload.len = SYNC_PROTO_MAX_LEN;
 383     res.payload.buf = (void *) &sres_hdr;
 384     res.payload.len = sizeof(sres_hdr);
 385     res.hdr.response_len = sizeof(res.hdr) + sizeof(sres_hdr);
 386     res.hdr.proto_version = SALVSYNC_PROTO_VERSION;
 387
 388     scom.hdr = &com.hdr;
 389     scom.sop = (SALVSYNC_command_hdr *) buf;
 390     scom.com = &com;
 391     sres.hdr = &res.hdr;
 392     sres.sop = &sres_hdr;
 393     sres.res = &res;
 394
 395     SALV_cnt++;
 396     if (SYNC_getCom(&salvsync_server_state, fd, &com)) {
 397         Log("SALVSYNC_com:  read failed; dropping connection (cnt=%d)\n", SALV_cnt);
 398         SALVSYNC_Drop(fd);
 399         return;
 400     }
 401
 402     if (com.recv_len < sizeof(com.hdr)) {
 403         Log("SALVSYNC_com:  invalid protocol message length (%u)\n", com.recv_len);
 404         res.hdr.response = SYNC_COM_ERROR;
 405         res.hdr.reason = SYNC_REASON_MALFORMED_PACKET;
 406         res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
 407         goto respond;
 408     }
 409
 410     if (com.hdr.proto_version != SALVSYNC_PROTO_VERSION) {
 411         Log("SALVSYNC_com:  invalid protocol version (%u)\n", com.hdr.proto_version);
 412         res.hdr.response = SYNC_COM_ERROR;
 413         res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
 414         goto respond;
 415     }
 416
 417     if (com.hdr.command == SYNC_COM_CHANNEL_CLOSE) {
 418         res.hdr.response = SYNC_OK;
 419         res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
 420
 421         /* don't respond, just drop; senders of SYNC_COM_CHANNEL_CLOSE
 422          * never wait for a response. */
 423         goto done;
 424     }
 425
 426     if (com.recv_len != (sizeof(com.hdr) + sizeof(SALVSYNC_command_hdr))) {
 427         Log("SALVSYNC_com:  invalid protocol message length (%u)\n", com.recv_len);
 428         res.hdr.response = SYNC_COM_ERROR;
 429         res.hdr.reason = SYNC_REASON_MALFORMED_PACKET;
 430         res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
 431         goto respond;
 432     }
 433
 434     res.hdr.com_seq = com.hdr.com_seq;
 435
 436     VOL_LOCK;
 437     switch (com.hdr.command) {
 438     case SALVSYNC_NOP:
 439         break;
 440     case SALVSYNC_SALVAGE:
 441     case SALVSYNC_RAISEPRIO:
 442         res.hdr.response = SALVSYNC_com_Salvage(&scom, &sres);
 443         break;
 444     case SALVSYNC_CANCEL:
 445         /* cancel a salvage */
 446         res.hdr.response = SALVSYNC_com_Cancel(&scom, &sres);
 447         break;
 448     case SALVSYNC_CANCELALL:
 449         /* cancel all queued salvages */
 450         res.hdr.response = SALVSYNC_com_CancelAll(&scom, &sres);
 451         break;
 452     case SALVSYNC_QUERY:
 453         /* query whether a volume is done salvaging */
 454         res.hdr.response = SALVSYNC_com_Query(&scom, &sres);
 455         break;
 456     case SALVSYNC_OP_LINK:
 457         /* link a clone to its parent in the scheduler */
 458         res.hdr.response = SALVSYNC_com_Link(&scom, &sres);
 459         break;
 460     default:
 461         res.hdr.response = SYNC_BAD_COMMAND;
 462         break;
 463     }
 464
 465     sres_hdr.sq_len = salvageQueue.total_len;
 466     sres_hdr.pq_len = pendingQueue.len;
 467     VOL_UNLOCK;
 468
 469  respond:
 470     SYNC_putRes(&salvsync_server_state, fd, &res);
 471
 472  done:
 473     if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
 474         SALVSYNC_Drop(fd);
 475     }
 476 }
 477
 478 /**
 479  * request that a volume be salvaged.
 480  *
 481  * @param[in]  com  inbound command object
 482  * @param[out] res  outbound response object
 483  *
 484  * @return operation status
 485  *    @retval SYNC_OK success
 486  *    @retval SYNC_DENIED failed to enqueue request
 487  *    @retval SYNC_FAILED malformed command packet
 488  *
 489  * @note this is a SALVSYNC protocol rpc handler
 490  *
 491  * @internal
 492  *
 493  * @post the volume is enqueued in the to-be-salvaged queue.
 494  *       if the volume was already in the salvage queue, its
 495  *       priority (and thus its location in the queue) are
 496  *       updated.
 497  */
 498 static afs_int32
 499 SALVSYNC_com_Salvage(SALVSYNC_command * com, SALVSYNC_response * res)
 500 {
 501     afs_int32 code = SYNC_OK;
 502     struct SalvageQueueNode * node, * clone;
 503     int hash = 0;
 504
 505     if (SYNC_verifyProtocolString(com->sop->partName, sizeof(com->sop->partName))) {
 506         code = SYNC_FAILED;
 507         res->hdr->reason = SYNC_REASON_MALFORMED_PACKET;
 508         goto done;
 509     }
 510
 511     clone = LookupNodeByCommand(com->sop, &node);
 512
 513     if (node == NULL) {
 514         if (AllocNode(&node)) {
 515             code = SYNC_DENIED;
 516             res->hdr->reason = SYNC_REASON_NOMEM;
 517             goto done;
 518         }
 519         clone = node;
 520         hash = 1;
 521     }
 522
 523     HandlePrio(clone, node, com->sop->prio);
 524
 525     switch (node->state) {
 526     case SALVSYNC_STATE_QUEUED:
 527         UpdateCommandPrio(node);
 528         break;
 529
 530     case SALVSYNC_STATE_ERROR:
 531     case SALVSYNC_STATE_DONE:
 532     case SALVSYNC_STATE_UNKNOWN:
 533         memcpy(&clone->command.com, com->hdr, sizeof(SYNC_command_hdr));
 534         memcpy(&clone->command.sop, com->sop, sizeof(SALVSYNC_command_hdr));
 535
 536         /*
 537          * make sure volgroup parent partition path is kept coherent
 538          *
 539          * If we ever want to support non-COW clones on a machine holding
 540          * the RW site, please note that this code does not work under the
 541          * conditions where someone zaps a COW clone on partition X, and
 542          * subsequently creates a full clone on partition Y -- we'd need
 543          * an inverse to SALVSYNC_com_Link.
 544          *  -- tkeiser 11/28/2007
 545          */
 546         strcpy(node->command.sop.partName, com->sop->partName);
 547
 548         if (AddToSalvageQueue(node)) {
 549             code = SYNC_DENIED;
 550         }
 551         break;
 552
 553     default:
 554         break;
 555     }
 556
 557     if (hash) {
 558         AddNodeToHash(node);
 559     }
 560
 561     res->hdr->flags |= SALVSYNC_FLAG_VOL_STATS_VALID;
 562     res->sop->state = node->state;
 563     res->sop->prio = node->command.sop.prio;
 564
 565  done:
 566     return code;
 567 }
 568
 569 /**
 570  * cancel a pending salvage request.
 571  *
 572  * @param[in]  com  inbound command object
 573  * @param[out] res  outbound response object
 574  *
 575  * @return operation status
 576  *    @retval SYNC_OK success
 577  *    @retval SYNC_FAILED malformed command packet
 578  *
 579  * @note this is a SALVSYNC protocol rpc handler
 580  *
 581  * @internal
 582  */
 583 static afs_int32
 584 SALVSYNC_com_Cancel(SALVSYNC_command * com, SALVSYNC_response * res)
 585 {
 586     afs_int32 code = SYNC_OK;
 587     struct SalvageQueueNode * node;
 588
 589     if (SYNC_verifyProtocolString(com->sop->partName, sizeof(com->sop->partName))) {
 590         code = SYNC_FAILED;
 591         res->hdr->reason = SYNC_REASON_MALFORMED_PACKET;
 592         goto done;
 593     }
 594
 595     node = LookupNodeByCommand(com->sop, NULL);
 596
 597     if (node == NULL) {
 598         res->sop->state = SALVSYNC_STATE_UNKNOWN;
 599         res->sop->prio = 0;
 600     } else {
 601         res->hdr->flags |= SALVSYNC_FLAG_VOL_STATS_VALID;
 602         res->sop->prio = node->command.sop.prio;
 603         res->sop->state = node->state;
 604         if ((node->type == SALVSYNC_VOLGROUP_PARENT) &&
 605             (node->state == SALVSYNC_STATE_QUEUED)) {
 606             DeleteFromSalvageQueue(node);
 607         }
 608     }
 609
 610  done:
 611     return code;
 612 }
 613
 614 /**
 615  * cancel all pending salvage requests.
 616  *
 617  * @param[in]  com  incoming command object
 618  * @param[out] res  outbound response object
 619  *
 620  * @return operation status
 621  *    @retval SYNC_OK success
 622  *
 623  * @note this is a SALVSYNC protocol rpc handler
 624  *
 625  * @internal
 626  */
 627 static afs_int32
 628 SALVSYNC_com_CancelAll(SALVSYNC_command * com, SALVSYNC_response * res)
 629 {
 630     struct SalvageQueueNode * np, *nnp;
 631     struct DiskPartition64 * dp;
 632
 633     for (dp = DiskPartitionList ; dp ; dp = dp->next) {
 634         for (queue_Scan(&salvageQueue.part[dp->index], np, nnp, SalvageQueueNode)) {
 635             DeleteFromSalvageQueue(np);
 636         }
 637     }
 638
 639     return SYNC_OK;
 640 }
 641
 642 /**
 643  * link a queue node for a clone to its parent volume.
 644  *
 645  * @param[in]  com   inbound command object
 646  * @param[out] res   outbound response object
 647  *
 648  * @return operation status
 649  *    @retval SYNC_OK success
 650  *    @retval SYNC_FAILED malformed command packet
 651  *    @retval SYNC_DENIED the request could not be completed
 652  *
 653  * @note this is a SALVSYNC protocol rpc handler
 654  *
 655  * @post the requested volume is marked as a child of another volume.
 656  *       thus, future salvage requests for this volume will result in the
 657  *       parent of the volume group being scheduled for salvage instead
 658  *       of this clone.
 659  *
 660  * @internal
 661  */
 662 static afs_int32
 663 SALVSYNC_com_Link(SALVSYNC_command * com, SALVSYNC_response * res)
 664 {
 665     afs_int32 code = SYNC_OK;
 666     struct SalvageQueueNode * clone, * parent;
 667
 668     if (SYNC_verifyProtocolString(com->sop->partName, sizeof(com->sop->partName))) {
 669         code = SYNC_FAILED;
 670         res->hdr->reason = SYNC_REASON_MALFORMED_PACKET;
 671         goto done;
 672     }
 673
 674     /* lookup clone's salvage scheduling node */
 675     clone = LookupNodeByCommand(com->sop, NULL);
 676     if (clone == NULL) {
 677         code = SYNC_DENIED;
 678         res->hdr->reason = SALVSYNC_REASON_ERROR;
 679         goto done;
 680     }
 681
 682     /* lookup parent's salvage scheduling node */
 683     parent = LookupNode(com->sop->parent, com->sop->partName, NULL);
 684     if (parent == NULL) {
 685         if (AllocNode(&parent)) {
 686             code = SYNC_DENIED;
 687             res->hdr->reason = SYNC_REASON_NOMEM;
 688             goto done;
 689         }
 690         memcpy(&parent->command.com, com->hdr, sizeof(SYNC_command_hdr));
 691         memcpy(&parent->command.sop, com->sop, sizeof(SALVSYNC_command_hdr));
 692         parent->command.sop.volume = parent->command.sop.parent = com->sop->parent;
 693         AddNodeToHash(parent);
 694     }
 695
 696     if (LinkNode(parent, clone)) {
 697         code = SYNC_DENIED;
 698         goto done;
 699     }
 700
 701  done:
 702     return code;
 703 }
 704
 705 /**
 706  * query the status of a volume salvage request.
 707  *
 708  * @param[in]  com   inbound command object
 709  * @param[out] res   outbound response object
 710  *
 711  * @return operation status
 712  *    @retval SYNC_OK success
 713  *    @retval SYNC_FAILED malformed command packet
 714  *
 715  * @note this is a SALVSYNC protocol rpc handler
 716  *
 717  * @internal
 718  */
 719 static afs_int32
 720 SALVSYNC_com_Query(SALVSYNC_command * com, SALVSYNC_response * res)
 721 {
 722     afs_int32 code = SYNC_OK;
 723     struct SalvageQueueNode * node;
 724
 725     if (SYNC_verifyProtocolString(com->sop->partName, sizeof(com->sop->partName))) {
 726         code = SYNC_FAILED;
 727         res->hdr->reason = SYNC_REASON_MALFORMED_PACKET;
 728         goto done;
 729     }
 730
 731     LookupNodeByCommand(com->sop, &node);
 732
 733     /* query whether a volume is done salvaging */
 734     if (node == NULL) {
 735         res->sop->state = SALVSYNC_STATE_UNKNOWN;
 736         res->sop->prio = 0;
 737     } else {
 738         res->hdr->flags |= SALVSYNC_FLAG_VOL_STATS_VALID;
 739         res->sop->state = node->state;
 740         res->sop->prio = node->command.sop.prio;
 741     }
 742
 743  done:
 744     return code;
 745 }
 746
 747 static void
 748 SALVSYNC_Drop(osi_socket fd)
 749 {
 750     RemoveHandler(fd);
 751     rk_closesocket(fd);
 752     AcceptOn();
 753 }
 754
 755 static int AcceptHandler = -1;  /* handler id for accept, if turned on */
 756
 757 static void
 758 AcceptOn(void)
 759 {
 760     if (AcceptHandler == -1) {
 761         opr_Verify(AddHandler(salvsync_server_state.fd,
 762                               SALVSYNC_newconnection));
 763         AcceptHandler = FindHandler(salvsync_server_state.fd);
 764     }
 765 }
 766
 767 static void
 768 AcceptOff(void)
 769 {
 770     if (AcceptHandler != -1) {
 771         opr_Verify(RemoveHandler(salvsync_server_state.fd));
 772         AcceptHandler = -1;
 773     }
 774 }
 775
 776 /* The multiple FD handling code. */
 777
 778 static void
 779 InitHandler(void)
 780 {
 781     int i;
 782     ObtainWriteLock(&SALVSYNC_handler_lock);
 783     for (i = 0; i < MAXHANDLERS; i++) {
 784         HandlerFD[i] = OSI_NULLSOCKET;
 785         HandlerProc[i] = NULL;
 786     }
 787     ReleaseWriteLock(&SALVSYNC_handler_lock);
 788 }
 789
 790 static void
 791 CallHandler(fd_set * fdsetp)
 792 {
 793     int i;
 794     ObtainReadLock(&SALVSYNC_handler_lock);
 795     for (i = 0; i < MAXHANDLERS; i++) {
 796         if (HandlerFD[i] >= 0 && FD_ISSET(HandlerFD[i], fdsetp)) {
 797             ReleaseReadLock(&SALVSYNC_handler_lock);
 798             (*HandlerProc[i]) (HandlerFD[i]);
 799             ObtainReadLock(&SALVSYNC_handler_lock);
 800         }
 801     }
 802     ReleaseReadLock(&SALVSYNC_handler_lock);
 803 }
 804
 805 static int
 806 AddHandler(osi_socket afd, void (*aproc) (int))
 807 {
 808     int i;
 809     ObtainWriteLock(&SALVSYNC_handler_lock);
 810     for (i = 0; i < MAXHANDLERS; i++)
 811         if (HandlerFD[i] == OSI_NULLSOCKET)
 812             break;
 813     if (i >= MAXHANDLERS) {
 814         ReleaseWriteLock(&SALVSYNC_handler_lock);
 815         return 0;
 816     }
 817     HandlerFD[i] = afd;
 818     HandlerProc[i] = aproc;
 819     ReleaseWriteLock(&SALVSYNC_handler_lock);
 820     return 1;
 821 }
 822
 823 static int
 824 FindHandler(osi_socket afd)
 825 {
 826     int i;
 827     ObtainReadLock(&SALVSYNC_handler_lock);
 828     for (i = 0; i < MAXHANDLERS; i++)
 829         if (HandlerFD[i] == afd) {
 830             ReleaseReadLock(&SALVSYNC_handler_lock);
 831             return i;
 832         }
 833     ReleaseReadLock(&SALVSYNC_handler_lock);    /* just in case */
 834     osi_Panic("Failed to find handler\n");
 835     return -1;                  /* satisfy compiler */
 836 }
 837
 838 static int
 839 FindHandler_r(osi_socket afd)
 840 {
 841     int i;
 842     for (i = 0; i < MAXHANDLERS; i++)
 843         if (HandlerFD[i] == afd) {
 844             return i;
 845         }
 846     osi_Panic("Failed to find handler\n");
 847     return -1;                  /* satisfy compiler */
 848 }
 849
 850 static int
 851 RemoveHandler(osi_socket afd)
 852 {
 853     ObtainWriteLock(&SALVSYNC_handler_lock);
 854     HandlerFD[FindHandler_r(afd)] = OSI_NULLSOCKET;
 855     ReleaseWriteLock(&SALVSYNC_handler_lock);
 856     return 1;
 857 }
 858
 859 static void
 860 GetHandler(fd_set * fdsetp, int *maxfdp)
 861 {
 862     int i;
 863     int maxfd = -1;
 864     FD_ZERO(fdsetp);
 865     ObtainReadLock(&SALVSYNC_handler_lock);     /* just in case */
 866     for (i = 0; i < MAXHANDLERS; i++)
 867         if (HandlerFD[i] != OSI_NULLSOCKET) {
 868             FD_SET(HandlerFD[i], fdsetp);
 869 #ifndef AFS_NT40_ENV
 870             /* On Windows the nfds parameter to select() is ignored */
 871             if (maxfd < HandlerFD[i] || maxfd == (int)-1)
 872                 maxfd = HandlerFD[i];
 873 #endif
 874         }
 875     *maxfdp = maxfd;
 876     ReleaseReadLock(&SALVSYNC_handler_lock);    /* just in case */
 877 }
 878
 879 /**
 880  * allocate a salvage queue node.
 881  *
 882  * @param[out] node_out  address in which to store new node pointer
 883  *
 884  * @return operation status
 885  *    @retval 0 success
 886  *    @retval 1 failed to allocate node
 887  *
 888  * @internal
 889  */
 890 static int
 891 AllocNode(struct SalvageQueueNode ** node_out)
 892 {
 893     int code = 0;
 894     struct SalvageQueueNode * node;
 895
 896     *node_out = node = calloc(1, sizeof(struct SalvageQueueNode));
 897     if (node == NULL) {
 898         code = 1;
 899         goto done;
 900     }
 901
 902     node->type = SALVSYNC_VOLGROUP_PARENT;
 903     node->state = SALVSYNC_STATE_UNKNOWN;
 904
 905  done:
 906     return code;
 907 }
 908
 909 /**
 910  * link a salvage queue node to its parent.
 911  *
 912  * @param[in] parent  pointer to queue node for parent of volume group
 913  * @param[in] clone   pointer to queue node for a clone
 914  *
 915  * @return operation status
 916  *    @retval 0 success
 917  *    @retval 1 failure
 918  *
 919  * @internal
 920  */
 921 static int
 922 LinkNode(struct SalvageQueueNode * parent,
 923          struct SalvageQueueNode * clone)
 924 {
 925     int code = 0;
 926     int idx;
 927
 928     /* check for attaching a clone to a clone */
 929     if (parent->type != SALVSYNC_VOLGROUP_PARENT) {
 930         code = 1;
 931         goto done;
 932     }
 933
 934     /* check for pre-existing registration and openings */
 935     for (idx = 0; idx < VOLMAXTYPES; idx++) {
 936         if (parent->volgroup.children[idx] == clone) {
 937             goto linked;
 938         }
 939         if (parent->volgroup.children[idx] == NULL) {
 940             break;
 941         }
 942     }
 943     if (idx == VOLMAXTYPES) {
 944         code = 1;
 945         goto done;
 946     }
 947
 948     /* link parent and child */
 949     parent->volgroup.children[idx] = clone;
 950     clone->type = SALVSYNC_VOLGROUP_CLONE;
 951     clone->volgroup.parent = parent;
 952
 953
 954  linked:
 955     switch (clone->state) {
 956     case SALVSYNC_STATE_QUEUED:
 957         DeleteFromSalvageQueue(clone);
 958
 959     case SALVSYNC_STATE_SALVAGING:
 960         switch (parent->state) {
 961         case SALVSYNC_STATE_UNKNOWN:
 962         case SALVSYNC_STATE_ERROR:
 963         case SALVSYNC_STATE_DONE:
 964             parent->command.sop.prio = clone->command.sop.prio;
 965             AddToSalvageQueue(parent);
 966             break;
 967
 968         case SALVSYNC_STATE_QUEUED:
 969             if (clone->command.sop.prio) {
 970                 parent->command.sop.prio += clone->command.sop.prio;
 971                 UpdateCommandPrio(parent);
 972             }
 973             break;
 974
 975         default:
 976             break;
 977         }
 978         break;
 979
 980     default:
 981         break;
 982     }
 983
 984  done:
 985     return code;
 986 }
 987
 988 static void
 989 HandlePrio(struct SalvageQueueNode * clone,
 990            struct SalvageQueueNode * node,
 991            afs_uint32 new_prio)
 992 {
 993     afs_uint32 delta;
 994
 995     switch (node->state) {
 996     case SALVSYNC_STATE_ERROR:
 997     case SALVSYNC_STATE_DONE:
 998     case SALVSYNC_STATE_UNKNOWN:
 999         node->command.sop.prio = 0;
1000         break;
1001     default:
1002         break;
1003     }
1004
1005     if (new_prio < clone->command.sop.prio) {
1006         /* strange. let's just set our delta to 1 */
1007         delta = 1;
1008     } else {
1009         delta = new_prio - clone->command.sop.prio;
1010     }
1011
1012     if (clone->type == SALVSYNC_VOLGROUP_CLONE) {
1013         clone->command.sop.prio = new_prio;
1014     }
1015
1016     node->command.sop.prio += delta;
1017 }
1018
1019 static int
1020 AddToSalvageQueue(struct SalvageQueueNode * node)
1021 {
1022     afs_int32 id;
1023     struct SalvageQueueNode * last = NULL;
1024
1025     id = volutil_GetPartitionID(node->command.sop.partName);
1026     if (id < 0 || id > VOLMAXPARTS) {
1027         return 1;
1028     }
1029     if (!VGetPartitionById_r(id, 0)) {
1030         /* don't enqueue salvage requests for unmounted partitions */
1031         return 1;
1032     }
1033     if (queue_IsOnQueue(node)) {
1034         return 0;
1035     }
1036
1037     if (queue_IsNotEmpty(&salvageQueue.part[id])) {
1038         last = queue_Last(&salvageQueue.part[id], SalvageQueueNode);
1039     }
1040     queue_Append(&salvageQueue.part[id], node);
1041     salvageQueue.len[id]++;
1042     salvageQueue.total_len++;
1043     salvageQueue.last_insert = id;
1044     node->partition_id = id;
1045     node->state = SALVSYNC_STATE_QUEUED;
1046
1047     /* reorder, if necessary */
1048     if (last && last->command.sop.prio < node->command.sop.prio) {
1049         UpdateCommandPrio(node);
1050     }
1051
1052     CV_BROADCAST(&salvageQueue.cv);
1053     return 0;
1054 }
1055
1056 static void
1057 DeleteFromSalvageQueue(struct SalvageQueueNode * node)
1058 {
1059     if (queue_IsOnQueue(node)) {
1060         queue_Remove(node);
1061         salvageQueue.len[node->partition_id]--;
1062         salvageQueue.total_len--;
1063         node->state = SALVSYNC_STATE_UNKNOWN;
1064         CV_BROADCAST(&salvageQueue.cv);
1065     }
1066 }
1067
1068 static void
1069 AddToPendingQueue(struct SalvageQueueNode * node)
1070 {
1071     queue_Append(&pendingQueue, node);
1072     pendingQueue.len++;
1073     node->state = SALVSYNC_STATE_SALVAGING;
1074     CV_BROADCAST(&pendingQueue.queue_change_cv);
1075 }
1076
1077 static void
1078 DeleteFromPendingQueue(struct SalvageQueueNode * node)
1079 {
1080     if (queue_IsOnQueue(node)) {
1081         queue_Remove(node);
1082         pendingQueue.len--;
1083         node->state = SALVSYNC_STATE_UNKNOWN;
1084         CV_BROADCAST(&pendingQueue.queue_change_cv);
1085     }
1086 }
1087
1088 #if 0
1089 static struct SalvageQueueNode *
1090 LookupPendingCommand(SALVSYNC_command_hdr * qry)
1091 {
1092     struct SalvageQueueNode * np, * nnp;
1093
1094     for (queue_Scan(&pendingQueue, np, nnp, SalvageQueueNode)) {
1095         if ((np->command.sop.volume == qry->volume) &&
1096             !strncmp(np->command.sop.partName, qry->partName,
1097                      sizeof(qry->partName)))
1098             break;
1099     }
1100
1101     if (queue_IsEnd(&pendingQueue, np))
1102         np = NULL;
1103     return np;
1104 }
1105 #endif
1106
1107 static struct SalvageQueueNode *
1108 LookupPendingCommandByPid(int pid)
1109 {
1110     struct SalvageQueueNode * np, * nnp;
1111
1112     for (queue_Scan(&pendingQueue, np, nnp, SalvageQueueNode)) {
1113         if (np->pid == pid)
1114             break;
1115     }
1116
1117     if (queue_IsEnd(&pendingQueue, np))
1118         np = NULL;
1119     return np;
1120 }
1121
1122
1123 /* raise the priority of a previously scheduled salvage */
1124 static void
1125 UpdateCommandPrio(struct SalvageQueueNode * node)
1126 {
1127     struct SalvageQueueNode *np, *nnp;
1128     afs_int32 id;
1129     afs_uint32 prio;
1130
1131     opr_Assert(queue_IsOnQueue(node));
1132
1133     prio = node->command.sop.prio;
1134     id = node->partition_id;
1135     if (queue_First(&salvageQueue.part[id], SalvageQueueNode)->command.sop.prio < prio) {
1136         queue_Remove(node);
1137         queue_Prepend(&salvageQueue.part[id], node);
1138     } else {
1139         for (queue_ScanBackwardsFrom(&salvageQueue.part[id], node, np, nnp, SalvageQueueNode)) {
1140             if (np->command.sop.prio > prio)
1141                 break;
1142         }
1143         if (queue_IsEnd(&salvageQueue.part[id], np)) {
1144             queue_Remove(node);
1145             queue_Prepend(&salvageQueue.part[id], node);
1146         } else if (node != np) {
1147             queue_Remove(node);
1148             queue_InsertAfter(np, node);
1149         }
1150     }
1151 }
1152
1153 /* this will need to be rearchitected if we ever want more than one thread
1154  * to wait for new salvage nodes */
1155 struct SalvageQueueNode *
1156 SALVSYNC_getWork(void)
1157 {
1158     int i;
1159     struct DiskPartition64 * dp = NULL, * fdp;
1160     static afs_int32 next_part_sched = 0;
1161     struct SalvageQueueNode *node = NULL;
1162
1163     VOL_LOCK;
1164
1165     /*
1166      * wait for work to be scheduled
1167      * if there are no disk partitions, just sit in this wait loop forever
1168      */
1169     while (!salvageQueue.total_len || !DiskPartitionList) {
1170         VOL_CV_WAIT(&salvageQueue.cv);
1171     }
1172
1173     /*
1174      * short circuit for simple case where only one partition has
1175      * scheduled salvages
1176      */
1177     if (salvageQueue.last_insert >= 0 && salvageQueue.last_insert <= VOLMAXPARTS &&
1178         (salvageQueue.total_len == salvageQueue.len[salvageQueue.last_insert])) {
1179         node = queue_First(&salvageQueue.part[salvageQueue.last_insert], SalvageQueueNode);
1180         goto have_node;
1181     }
1182
1183
1184     /*
1185      * ok, more than one partition has scheduled salvages.
1186      * now search for partitions with scheduled salvages, but no pending salvages.
1187      */
1188     dp = VGetPartitionById_r(next_part_sched, 0);
1189     if (!dp) {
1190         dp = DiskPartitionList;
1191     }
1192     fdp = dp;
1193
1194     for (i=0 ;
1195          !i || dp != fdp ;
1196          dp = (dp->next) ? dp->next : DiskPartitionList, i++ ) {
1197         if (!partition_salvaging[dp->index] && salvageQueue.len[dp->index]) {
1198             node = queue_First(&salvageQueue.part[dp->index], SalvageQueueNode);
1199             goto have_node;
1200         }
1201     }
1202
1203
1204     /*
1205      * all partitions with scheduled salvages have at least one pending.
1206      * now do an exhaustive search for a scheduled salvage.
1207      */
1208     dp = fdp;
1209
1210     for (i=0 ;
1211          !i || dp != fdp ;
1212          dp = (dp->next) ? dp->next : DiskPartitionList, i++ ) {
1213         if (salvageQueue.len[dp->index]) {
1214             node = queue_First(&salvageQueue.part[dp->index], SalvageQueueNode);
1215             goto have_node;
1216         }
1217     }
1218
1219     /* we should never reach this line */
1220     osi_Panic("Node not found\n");
1221
1222  have_node:
1223     opr_Assert(node != NULL);
1224     node->pid = 0;
1225     partition_salvaging[node->partition_id]++;
1226     DeleteFromSalvageQueue(node);
1227     AddToPendingQueue(node);
1228
1229     if (dp) {
1230         /* update next_part_sched field */
1231         if (dp->next) {
1232             next_part_sched = dp->next->index;
1233         } else if (DiskPartitionList) {
1234             next_part_sched = DiskPartitionList->index;
1235         } else {
1236             next_part_sched = -1;
1237         }
1238     }
1239
1240     VOL_UNLOCK;
1241     return node;
1242 }
1243
1244 /**
1245  * update internal scheduler state to reflect completion of a work unit.
1246  *
1247  * @param[in]  node    salvage queue node object pointer
1248  * @param[in]  result  worker process result code
1249  *
1250  * @post scheduler state is updated.
1251  *
1252  * @internal
1253  */
1254 static void
1255 SALVSYNC_doneWork_r(struct SalvageQueueNode * node, int result)
1256 {
1257     afs_int32 partid;
1258     int idx;
1259
1260     DeleteFromPendingQueue(node);
1261     partid = node->partition_id;
1262     if (partid >=0 && partid <= VOLMAXPARTS) {
1263         partition_salvaging[partid]--;
1264     }
1265     if (result == 0) {
1266         node->state = SALVSYNC_STATE_DONE;
1267     } else if (result != SALSRV_EXIT_VOLGROUP_LINK) {
1268         node->state = SALVSYNC_STATE_ERROR;
1269     }
1270
1271     if (node->type == SALVSYNC_VOLGROUP_PARENT) {
1272         for (idx = 0; idx < VOLMAXTYPES; idx++) {
1273             if (node->volgroup.children[idx]) {
1274                 node->volgroup.children[idx]->state = node->state;
1275             }
1276         }
1277     }
1278 }
1279
1280 /**
1281  * check whether worker child failed.
1282  *
1283  * @param[in] status  status bitfield return by wait()
1284  *
1285  * @return boolean failure code
1286  *    @retval 0 child succeeded
1287  *    @retval 1 child failed
1288  *
1289  * @internal
1290  */
1291 static int
1292 ChildFailed(int status)
1293 {
1294     return (WCOREDUMP(status) ||
1295             WIFSIGNALED(status) ||
1296             ((WEXITSTATUS(status) != 0) &&
1297              (WEXITSTATUS(status) != SALSRV_EXIT_VOLGROUP_LINK)));
1298 }
1299
1300
1301 /**
1302  * notify salvsync scheduler of node completion, by child pid.
1303  *
1304  * @param[in]  pid     pid of worker child
1305  * @param[in]  status  worker status bitfield from wait()
1306  *
1307  * @post scheduler state is updated.
1308  *       if status code is a failure, fileserver notification was attempted
1309  *
1310  * @see SALVSYNC_doneWork_r
1311  */
1312 void
1313 SALVSYNC_doneWorkByPid(int pid, int status)
1314 {
1315     struct SalvageQueueNode * node;
1316     char partName[16];
1317     VolumeId volids[VOLMAXTYPES+1];
1318     unsigned int idx;
1319
1320     memset(volids, 0, sizeof(volids));
1321
1322     VOL_LOCK;
1323     node = LookupPendingCommandByPid(pid);
1324     if (node != NULL) {
1325         SALVSYNC_doneWork_r(node, status);
1326
1327         if (ChildFailed(status)) {
1328             /* populate volume id list for later processing outside the glock */
1329             volids[0] = node->command.sop.volume;
1330             strcpy(partName, node->command.sop.partName);
1331             if (node->type == SALVSYNC_VOLGROUP_PARENT) {
1332                 for (idx = 0; idx < VOLMAXTYPES; idx++) {
1333                     if (node->volgroup.children[idx]) {
1334                         volids[idx+1] = node->volgroup.children[idx]->command.sop.volume;
1335                     }
1336                 }
1337             }
1338         }
1339     }
1340     VOL_UNLOCK;
1341
1342     /*
1343      * if necessary, notify fileserver of
1344      * failure to salvage volume group
1345      * [we cannot guarantee that the child made the
1346      *  appropriate notifications (e.g. SIGSEGV)]
1347      *  -- tkeiser 11/28/2007
1348      */
1349     if (ChildFailed(status)) {
1350         for (idx = 0; idx <= VOLMAXTYPES; idx++) {
1351             if (volids[idx]) {
1352                 FSYNC_VolOp(volids[idx],
1353                             partName,
1354                             FSYNC_VOL_FORCE_ERROR,
1355                             FSYNC_WHATEVER,
1356                             NULL);
1357             }
1358         }
1359     }
1360 }
1361
1362 #endif /* AFS_DEMAND_ATTACH_FS */