fs/afs/vlclient.c

   1 /* AFS Volume Location Service client
   2  *
   3  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells ([email protected])
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/gfp.h>
  13 #include <linux/init.h>
  14 #include <linux/sched.h>
  15 #include "afs_fs.h"
  16 #include "internal.h"
  17
  18 /*
  19  * Deliver reply data to a VL.GetEntryByNameU call.
  20  */
  21 static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
  22 {
  23         struct afs_uvldbentry__xdr *uvldb;
  24         struct afs_vldb_entry *entry;
  25         bool new_only = false;
  26         u32 tmp, nr_servers, vlflags;
  27         int i, ret;
  28
  29         _enter("");
  30
  31         ret = afs_transfer_reply(call);
  32         if (ret < 0)
  33                 return ret;
  34
  35         /* unmarshall the reply once we've received all of it */
  36         uvldb = call->buffer;
  37         entry = call->ret_vldb;
  38
  39         nr_servers = ntohl(uvldb->nServers);
  40         if (nr_servers > AFS_NMAXNSERVERS)
  41                 nr_servers = AFS_NMAXNSERVERS;
  42
  43         for (i = 0; i < ARRAY_SIZE(uvldb->name) - 1; i++)
  44                 entry->name[i] = (u8)ntohl(uvldb->name[i]);
  45         entry->name[i] = 0;
  46         entry->name_len = strlen(entry->name);
  47
  48         /* If there is a new replication site that we can use, ignore all the
  49          * sites that aren't marked as new.
  50          */
  51         for (i = 0; i < nr_servers; i++) {
  52                 tmp = ntohl(uvldb->serverFlags[i]);
  53                 if (!(tmp & AFS_VLSF_DONTUSE) &&
  54                     (tmp & AFS_VLSF_NEWREPSITE))
  55                         new_only = true;
  56         }
  57
  58         vlflags = ntohl(uvldb->flags);
  59         for (i = 0; i < nr_servers; i++) {
  60                 struct afs_uuid__xdr *xdr;
  61                 struct afs_uuid *uuid;
  62                 int j;
  63
  64                 tmp = ntohl(uvldb->serverFlags[i]);
  65                 if (tmp & AFS_VLSF_DONTUSE ||
  66                     (new_only && !(tmp & AFS_VLSF_NEWREPSITE)))
  67                         continue;
  68                 if (tmp & AFS_VLSF_RWVOL) {
  69                         entry->fs_mask[i] |= AFS_VOL_VTM_RW;
  70                         if (vlflags & AFS_VLF_BACKEXISTS)
  71                                 entry->fs_mask[i] |= AFS_VOL_VTM_BAK;
  72                 }
  73                 if (tmp & AFS_VLSF_ROVOL)
  74                         entry->fs_mask[i] |= AFS_VOL_VTM_RO;
  75                 if (!entry->fs_mask[i])
  76                         continue;
  77
  78                 xdr = &uvldb->serverNumber[i];
  79                 uuid = (struct afs_uuid *)&entry->fs_server[i];
  80                 uuid->time_low                  = xdr->time_low;
  81                 uuid->time_mid                  = htons(ntohl(xdr->time_mid));
  82                 uuid->time_hi_and_version       = htons(ntohl(xdr->time_hi_and_version));
  83                 uuid->clock_seq_hi_and_reserved = (u8)ntohl(xdr->clock_seq_hi_and_reserved);
  84                 uuid->clock_seq_low             = (u8)ntohl(xdr->clock_seq_low);
  85                 for (j = 0; j < 6; j++)
  86                         uuid->node[j] = (u8)ntohl(xdr->node[j]);
  87
  88                 entry->nr_servers++;
  89         }
  90
  91         for (i = 0; i < AFS_MAXTYPES; i++)
  92                 entry->vid[i] = ntohl(uvldb->volumeId[i]);
  93
  94         if (vlflags & AFS_VLF_RWEXISTS)
  95                 __set_bit(AFS_VLDB_HAS_RW, &entry->flags);
  96         if (vlflags & AFS_VLF_ROEXISTS)
  97                 __set_bit(AFS_VLDB_HAS_RO, &entry->flags);
  98         if (vlflags & AFS_VLF_BACKEXISTS)
  99                 __set_bit(AFS_VLDB_HAS_BAK, &entry->flags);
 100
 101         if (!(vlflags & (AFS_VLF_RWEXISTS | AFS_VLF_ROEXISTS | AFS_VLF_BACKEXISTS))) {
 102                 entry->error = -ENOMEDIUM;
 103                 __set_bit(AFS_VLDB_QUERY_ERROR, &entry->flags);
 104         }
 105
 106         __set_bit(AFS_VLDB_QUERY_VALID, &entry->flags);
 107         _leave(" = 0 [done]");
 108         return 0;
 109 }
 110
 111 static void afs_destroy_vl_get_entry_by_name_u(struct afs_call *call)
 112 {
 113         kfree(call->ret_vldb);
 114         afs_flat_call_destructor(call);
 115 }
 116
 117 /*
 118  * VL.GetEntryByNameU operation type.
 119  */
 120 static const struct afs_call_type afs_RXVLGetEntryByNameU = {
 121         .name           = "VL.GetEntryByNameU",
 122         .op             = afs_VL_GetEntryByNameU,
 123         .deliver        = afs_deliver_vl_get_entry_by_name_u,
 124         .destructor     = afs_destroy_vl_get_entry_by_name_u,
 125 };
 126
 127 /*
 128  * Dispatch a get volume entry by name or ID operation (uuid variant).  If the
 129  * volname is a decimal number then it's a volume ID not a volume name.
 130  */
 131 struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
 132                                                   const char *volname,
 133                                                   int volnamesz)
 134 {
 135         struct afs_vldb_entry *entry;
 136         struct afs_call *call;
 137         struct afs_net *net = vc->cell->net;
 138         size_t reqsz, padsz;
 139         __be32 *bp;
 140
 141         _enter("");
 142
 143         padsz = (4 - (volnamesz & 3)) & 3;
 144         reqsz = 8 + volnamesz + padsz;
 145
 146         entry = kzalloc(sizeof(struct afs_vldb_entry), GFP_KERNEL);
 147         if (!entry)
 148                 return ERR_PTR(-ENOMEM);
 149
 150         call = afs_alloc_flat_call(net, &afs_RXVLGetEntryByNameU, reqsz,
 151                                    sizeof(struct afs_uvldbentry__xdr));
 152         if (!call) {
 153                 kfree(entry);
 154                 return ERR_PTR(-ENOMEM);
 155         }
 156
 157         call->key = vc->key;
 158         call->ret_vldb = entry;
 159         call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 160
 161         /* Marshall the parameters */
 162         bp = call->request;
 163         *bp++ = htonl(VLGETENTRYBYNAMEU);
 164         *bp++ = htonl(volnamesz);
 165         memcpy(bp, volname, volnamesz);
 166         if (padsz > 0)
 167                 memset((void *)bp + volnamesz, 0, padsz);
 168
 169         trace_afs_make_vl_call(call);
 170         afs_make_call(&vc->ac, call, GFP_KERNEL);
 171         return (struct afs_vldb_entry *)afs_wait_for_call_to_complete(call, &vc->ac);
 172 }
 173
 174 /*
 175  * Deliver reply data to a VL.GetAddrsU call.
 176  *
 177  *      GetAddrsU(IN ListAddrByAttributes *inaddr,
 178  *                OUT afsUUID *uuidp1,
 179  *                OUT uint32_t *uniquifier,
 180  *                OUT uint32_t *nentries,
 181  *                OUT bulkaddrs *blkaddrs);
 182  */
 183 static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 184 {
 185         struct afs_addr_list *alist;
 186         __be32 *bp;
 187         u32 uniquifier, nentries, count;
 188         int i, ret;
 189
 190         _enter("{%u,%zu/%u}",
 191                call->unmarshall, iov_iter_count(call->_iter), call->count);
 192
 193         switch (call->unmarshall) {
 194         case 0:
 195                 afs_extract_to_buf(call,
 196                                    sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 197                 call->unmarshall++;
 198
 199                 /* Extract the returned uuid, uniquifier, nentries and
 200                  * blkaddrs size */
 201                 /* Fall through */
 202         case 1:
 203                 ret = afs_extract_data(call, true);
 204                 if (ret < 0)
 205                         return ret;
 206
 207                 bp = call->buffer + sizeof(struct afs_uuid__xdr);
 208                 uniquifier      = ntohl(*bp++);
 209                 nentries        = ntohl(*bp++);
 210                 count           = ntohl(*bp);
 211
 212                 nentries = min(nentries, count);
 213                 alist = afs_alloc_addrlist(nentries, FS_SERVICE, AFS_FS_PORT);
 214                 if (!alist)
 215                         return -ENOMEM;
 216                 alist->version = uniquifier;
 217                 call->ret_alist = alist;
 218                 call->count = count;
 219                 call->count2 = nentries;
 220                 call->unmarshall++;
 221
 222         more_entries:
 223                 count = min(call->count, 4U);
 224                 afs_extract_to_buf(call, count * sizeof(__be32));
 225
 226                 /* Fall through - and extract entries */
 227         case 2:
 228                 ret = afs_extract_data(call, call->count > 4);
 229                 if (ret < 0)
 230                         return ret;
 231
 232                 alist = call->ret_alist;
 233                 bp = call->buffer;
 234                 count = min(call->count, 4U);
 235                 for (i = 0; i < count; i++)
 236                         if (alist->nr_addrs < call->count2)
 237                                 afs_merge_fs_addr4(alist, *bp++, AFS_FS_PORT);
 238
 239                 call->count -= count;
 240                 if (call->count > 0)
 241                         goto more_entries;
 242                 call->unmarshall++;
 243                 break;
 244         }
 245
 246         _leave(" = 0 [done]");
 247         return 0;
 248 }
 249
 250 static void afs_vl_get_addrs_u_destructor(struct afs_call *call)
 251 {
 252         afs_put_addrlist(call->ret_alist);
 253         return afs_flat_call_destructor(call);
 254 }
 255
 256 /*
 257  * VL.GetAddrsU operation type.
 258  */
 259 static const struct afs_call_type afs_RXVLGetAddrsU = {
 260         .name           = "VL.GetAddrsU",
 261         .op             = afs_VL_GetAddrsU,
 262         .deliver        = afs_deliver_vl_get_addrs_u,
 263         .destructor     = afs_vl_get_addrs_u_destructor,
 264 };
 265
 266 /*
 267  * Dispatch an operation to get the addresses for a server, where the server is
 268  * nominated by UUID.
 269  */
 270 struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
 271                                          const uuid_t *uuid)
 272 {
 273         struct afs_ListAddrByAttributes__xdr *r;
 274         const struct afs_uuid *u = (const struct afs_uuid *)uuid;
 275         struct afs_call *call;
 276         struct afs_net *net = vc->cell->net;
 277         __be32 *bp;
 278         int i;
 279
 280         _enter("");
 281
 282         call = afs_alloc_flat_call(net, &afs_RXVLGetAddrsU,
 283                                    sizeof(__be32) + sizeof(struct afs_ListAddrByAttributes__xdr),
 284                                    sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 285         if (!call)
 286                 return ERR_PTR(-ENOMEM);
 287
 288         call->key = vc->key;
 289         call->ret_alist = NULL;
 290         call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 291
 292         /* Marshall the parameters */
 293         bp = call->request;
 294         *bp++ = htonl(VLGETADDRSU);
 295         r = (struct afs_ListAddrByAttributes__xdr *)bp;
 296         r->Mask         = htonl(AFS_VLADDR_UUID);
 297         r->ipaddr       = 0;
 298         r->index        = 0;
 299         r->spare        = 0;
 300         r->uuid.time_low                        = u->time_low;
 301         r->uuid.time_mid                        = htonl(ntohs(u->time_mid));
 302         r->uuid.time_hi_and_version             = htonl(ntohs(u->time_hi_and_version));
 303         r->uuid.clock_seq_hi_and_reserved       = htonl(u->clock_seq_hi_and_reserved);
 304         r->uuid.clock_seq_low                   = htonl(u->clock_seq_low);
 305         for (i = 0; i < 6; i++)
 306                 r->uuid.node[i] = htonl(u->node[i]);
 307
 308         trace_afs_make_vl_call(call);
 309         afs_make_call(&vc->ac, call, GFP_KERNEL);
 310         return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
 311 }
 312
 313 /*
 314  * Deliver reply data to an VL.GetCapabilities operation.
 315  */
 316 static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 317 {
 318         u32 count;
 319         int ret;
 320
 321         _enter("{%u,%zu/%u}",
 322                call->unmarshall, iov_iter_count(call->_iter), call->count);
 323
 324         switch (call->unmarshall) {
 325         case 0:
 326                 afs_extract_to_tmp(call);
 327                 call->unmarshall++;
 328
 329                 /* Fall through - and extract the capabilities word count */
 330         case 1:
 331                 ret = afs_extract_data(call, true);
 332                 if (ret < 0)
 333                         return ret;
 334
 335                 count = ntohl(call->tmp);
 336                 call->count = count;
 337                 call->count2 = count;
 338
 339                 call->unmarshall++;
 340                 afs_extract_discard(call, count * sizeof(__be32));
 341
 342                 /* Fall through - and extract capabilities words */
 343         case 2:
 344                 ret = afs_extract_data(call, false);
 345                 if (ret < 0)
 346                         return ret;
 347
 348                 /* TODO: Examine capabilities */
 349
 350                 call->unmarshall++;
 351                 break;
 352         }
 353
 354         _leave(" = 0 [done]");
 355         return 0;
 356 }
 357
 358 static void afs_destroy_vl_get_capabilities(struct afs_call *call)
 359 {
 360         afs_put_vlserver(call->net, call->vlserver);
 361         afs_flat_call_destructor(call);
 362 }
 363
 364 /*
 365  * VL.GetCapabilities operation type
 366  */
 367 static const struct afs_call_type afs_RXVLGetCapabilities = {
 368         .name           = "VL.GetCapabilities",
 369         .op             = afs_VL_GetCapabilities,
 370         .deliver        = afs_deliver_vl_get_capabilities,
 371         .done           = afs_vlserver_probe_result,
 372         .destructor     = afs_destroy_vl_get_capabilities,
 373 };
 374
 375 /*
 376  * Probe a volume server for the capabilities that it supports.  This can
 377  * return up to 196 words.
 378  *
 379  * We use this to probe for service upgrade to determine what the server at the
 380  * other end supports.
 381  */
 382 struct afs_call *afs_vl_get_capabilities(struct afs_net *net,
 383                                          struct afs_addr_cursor *ac,
 384                                          struct key *key,
 385                                          struct afs_vlserver *server,
 386                                          unsigned int server_index)
 387 {
 388         struct afs_call *call;
 389         __be32 *bp;
 390
 391         _enter("");
 392
 393         call = afs_alloc_flat_call(net, &afs_RXVLGetCapabilities, 1 * 4, 16 * 4);
 394         if (!call)
 395                 return ERR_PTR(-ENOMEM);
 396
 397         call->key = key;
 398         call->vlserver = afs_get_vlserver(server);
 399         call->server_index = server_index;
 400         call->upgrade = true;
 401         call->async = true;
 402         call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
 403
 404         /* marshall the parameters */
 405         bp = call->request;
 406         *bp++ = htonl(VLGETCAPABILITIES);
 407
 408         /* Can't take a ref on server */
 409         trace_afs_make_vl_call(call);
 410         afs_make_call(ac, call, GFP_KERNEL);
 411         return call;
 412 }
 413
 414 /*
 415  * Deliver reply data to a YFSVL.GetEndpoints call.
 416  *
 417  *      GetEndpoints(IN yfsServerAttributes *attr,
 418  *                   OUT opr_uuid *uuid,
 419  *                   OUT afs_int32 *uniquifier,
 420  *                   OUT endpoints *fsEndpoints,
 421  *                   OUT endpoints *volEndpoints)
 422  */
 423 static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 424 {
 425         struct afs_addr_list *alist;
 426         __be32 *bp;
 427         u32 uniquifier, size;
 428         int ret;
 429
 430         _enter("{%u,%zu,%u}",
 431                call->unmarshall, iov_iter_count(call->_iter), call->count2);
 432
 433         switch (call->unmarshall) {
 434         case 0:
 435                 afs_extract_to_buf(call, sizeof(uuid_t) + 3 * sizeof(__be32));
 436                 call->unmarshall = 1;
 437
 438                 /* Extract the returned uuid, uniquifier, fsEndpoints count and
 439                  * either the first fsEndpoint type or the volEndpoints
 440                  * count if there are no fsEndpoints. */
 441                 /* Fall through */
 442         case 1:
 443                 ret = afs_extract_data(call, true);
 444                 if (ret < 0)
 445                         return ret;
 446
 447                 bp = call->buffer + sizeof(uuid_t);
 448                 uniquifier      = ntohl(*bp++);
 449                 call->count     = ntohl(*bp++);
 450                 call->count2    = ntohl(*bp); /* Type or next count */
 451
 452                 if (call->count > YFS_MAXENDPOINTS)
 453                         return afs_protocol_error(call, -EBADMSG,
 454                                                   afs_eproto_yvl_fsendpt_num);
 455
 456                 alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT);
 457                 if (!alist)
 458                         return -ENOMEM;
 459                 alist->version = uniquifier;
 460                 call->ret_alist = alist;
 461
 462                 if (call->count == 0)
 463                         goto extract_volendpoints;
 464
 465         next_fsendpoint:
 466                 switch (call->count2) {
 467                 case YFS_ENDPOINT_IPV4:
 468                         size = sizeof(__be32) * (1 + 1 + 1);
 469                         break;
 470                 case YFS_ENDPOINT_IPV6:
 471                         size = sizeof(__be32) * (1 + 4 + 1);
 472                         break;
 473                 default:
 474                         return afs_protocol_error(call, -EBADMSG,
 475                                                   afs_eproto_yvl_fsendpt_type);
 476                 }
 477
 478                 size += sizeof(__be32);
 479                 afs_extract_to_buf(call, size);
 480                 call->unmarshall = 2;
 481
 482                 /* Fall through - and extract fsEndpoints[] entries */
 483         case 2:
 484                 ret = afs_extract_data(call, true);
 485                 if (ret < 0)
 486                         return ret;
 487
 488                 alist = call->ret_alist;
 489                 bp = call->buffer;
 490                 switch (call->count2) {
 491                 case YFS_ENDPOINT_IPV4:
 492                         if (ntohl(bp[0]) != sizeof(__be32) * 2)
 493                                 return afs_protocol_error(call, -EBADMSG,
 494                                                           afs_eproto_yvl_fsendpt4_len);
 495                         afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2]));
 496                         bp += 3;
 497                         break;
 498                 case YFS_ENDPOINT_IPV6:
 499                         if (ntohl(bp[0]) != sizeof(__be32) * 5)
 500                                 return afs_protocol_error(call, -EBADMSG,
 501                                                           afs_eproto_yvl_fsendpt6_len);
 502                         afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5]));
 503                         bp += 6;
 504                         break;
 505                 default:
 506                         return afs_protocol_error(call, -EBADMSG,
 507                                                   afs_eproto_yvl_fsendpt_type);
 508                 }
 509
 510                 /* Got either the type of the next entry or the count of
 511                  * volEndpoints if no more fsEndpoints.
 512                  */
 513                 call->count2 = ntohl(*bp++);
 514
 515                 call->count--;
 516                 if (call->count > 0)
 517                         goto next_fsendpoint;
 518
 519         extract_volendpoints:
 520                 /* Extract the list of volEndpoints. */
 521                 call->count = call->count2;
 522                 if (!call->count)
 523                         goto end;
 524                 if (call->count > YFS_MAXENDPOINTS)
 525                         return afs_protocol_error(call, -EBADMSG,
 526                                                   afs_eproto_yvl_vlendpt_type);
 527
 528                 afs_extract_to_buf(call, 1 * sizeof(__be32));
 529                 call->unmarshall = 3;
 530
 531                 /* Extract the type of volEndpoints[0].  Normally we would
 532                  * extract the type of the next endpoint when we extract the
 533                  * data of the current one, but this is the first...
 534                  */
 535                 /* Fall through */
 536         case 3:
 537                 ret = afs_extract_data(call, true);
 538                 if (ret < 0)
 539                         return ret;
 540
 541                 bp = call->buffer;
 542
 543         next_volendpoint:
 544                 call->count2 = ntohl(*bp++);
 545                 switch (call->count2) {
 546                 case YFS_ENDPOINT_IPV4:
 547                         size = sizeof(__be32) * (1 + 1 + 1);
 548                         break;
 549                 case YFS_ENDPOINT_IPV6:
 550                         size = sizeof(__be32) * (1 + 4 + 1);
 551                         break;
 552                 default:
 553                         return afs_protocol_error(call, -EBADMSG,
 554                                                   afs_eproto_yvl_vlendpt_type);
 555                 }
 556
 557                 if (call->count > 1)
 558                         size += sizeof(__be32); /* Get next type too */
 559                 afs_extract_to_buf(call, size);
 560                 call->unmarshall = 4;
 561
 562                 /* Fall through - and extract volEndpoints[] entries */
 563         case 4:
 564                 ret = afs_extract_data(call, true);
 565                 if (ret < 0)
 566                         return ret;
 567
 568                 bp = call->buffer;
 569                 switch (call->count2) {
 570                 case YFS_ENDPOINT_IPV4:
 571                         if (ntohl(bp[0]) != sizeof(__be32) * 2)
 572                                 return afs_protocol_error(call, -EBADMSG,
 573                                                           afs_eproto_yvl_vlendpt4_len);
 574                         bp += 3;
 575                         break;
 576                 case YFS_ENDPOINT_IPV6:
 577                         if (ntohl(bp[0]) != sizeof(__be32) * 5)
 578                                 return afs_protocol_error(call, -EBADMSG,
 579                                                           afs_eproto_yvl_vlendpt6_len);
 580                         bp += 6;
 581                         break;
 582                 default:
 583                         return afs_protocol_error(call, -EBADMSG,
 584                                                   afs_eproto_yvl_vlendpt_type);
 585                 }
 586
 587                 /* Got either the type of the next entry or the count of
 588                  * volEndpoints if no more fsEndpoints.
 589                  */
 590                 call->count--;
 591                 if (call->count > 0)
 592                         goto next_volendpoint;
 593
 594         end:
 595                 afs_extract_discard(call, 0);
 596                 call->unmarshall = 5;
 597
 598                 /* Fall through - Done */
 599         case 5:
 600                 ret = afs_extract_data(call, false);
 601                 if (ret < 0)
 602                         return ret;
 603                 call->unmarshall = 6;
 604
 605         case 6:
 606                 break;
 607         }
 608
 609         _leave(" = 0 [done]");
 610         return 0;
 611 }
 612
 613 /*
 614  * YFSVL.GetEndpoints operation type.
 615  */
 616 static const struct afs_call_type afs_YFSVLGetEndpoints = {
 617         .name           = "YFSVL.GetEndpoints",
 618         .op             = afs_YFSVL_GetEndpoints,
 619         .deliver        = afs_deliver_yfsvl_get_endpoints,
 620         .destructor     = afs_vl_get_addrs_u_destructor,
 621 };
 622
 623 /*
 624  * Dispatch an operation to get the addresses for a server, where the server is
 625  * nominated by UUID.
 626  */
 627 struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
 628                                               const uuid_t *uuid)
 629 {
 630         struct afs_call *call;
 631         struct afs_net *net = vc->cell->net;
 632         __be32 *bp;
 633
 634         _enter("");
 635
 636         call = afs_alloc_flat_call(net, &afs_YFSVLGetEndpoints,
 637                                    sizeof(__be32) * 2 + sizeof(*uuid),
 638                                    sizeof(struct in6_addr) + sizeof(__be32) * 3);
 639         if (!call)
 640                 return ERR_PTR(-ENOMEM);
 641
 642         call->key = vc->key;
 643         call->ret_alist = NULL;
 644         call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 645
 646         /* Marshall the parameters */
 647         bp = call->request;
 648         *bp++ = htonl(YVLGETENDPOINTS);
 649         *bp++ = htonl(YFS_SERVER_UUID);
 650         memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */
 651
 652         trace_afs_make_vl_call(call);
 653         afs_make_call(&vc->ac, call, GFP_KERNEL);
 654         return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
 655 }