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 (dhowells@redhat.com)
   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->reply[0];
  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->reply[0]);
 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->reply[0] = entry;
 159         call->ret_reply0 = true;
 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         return (struct afs_vldb_entry *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
 171 }
 172
 173 /*
 174  * Deliver reply data to a VL.GetAddrsU call.
 175  *
 176  *      GetAddrsU(IN ListAddrByAttributes *inaddr,
 177  *                OUT afsUUID *uuidp1,
 178  *                OUT uint32_t *uniquifier,
 179  *                OUT uint32_t *nentries,
 180  *                OUT bulkaddrs *blkaddrs);
 181  */
 182 static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 183 {
 184         struct afs_addr_list *alist;
 185         __be32 *bp;
 186         u32 uniquifier, nentries, count;
 187         int i, ret;
 188
 189         _enter("{%u,%zu/%u}",
 190                call->unmarshall, iov_iter_count(call->_iter), call->count);
 191
 192         switch (call->unmarshall) {
 193         case 0:
 194                 afs_extract_to_buf(call,
 195                                    sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 196                 call->unmarshall++;
 197
 198                 /* Extract the returned uuid, uniquifier, nentries and blkaddrs size */
 199         case 1:
 200                 ret = afs_extract_data(call, true);
 201                 if (ret < 0)
 202                         return ret;
 203
 204                 bp = call->buffer + sizeof(struct afs_uuid__xdr);
 205                 uniquifier      = ntohl(*bp++);
 206                 nentries        = ntohl(*bp++);
 207                 count           = ntohl(*bp);
 208
 209                 nentries = min(nentries, count);
 210                 alist = afs_alloc_addrlist(nentries, FS_SERVICE, AFS_FS_PORT);
 211                 if (!alist)
 212                         return -ENOMEM;
 213                 alist->version = uniquifier;
 214                 call->reply[0] = alist;
 215                 call->count = count;
 216                 call->count2 = nentries;
 217                 call->unmarshall++;
 218
 219         more_entries:
 220                 count = min(call->count, 4U);
 221                 afs_extract_to_buf(call, count * sizeof(__be32));
 222
 223                 /* Extract entries */
 224         case 2:
 225                 ret = afs_extract_data(call, call->count > 4);
 226                 if (ret < 0)
 227                         return ret;
 228
 229                 alist = call->reply[0];
 230                 bp = call->buffer;
 231                 count = min(call->count, 4U);
 232                 for (i = 0; i < count; i++)
 233                         if (alist->nr_addrs < call->count2)
 234                                 afs_merge_fs_addr4(alist, *bp++, AFS_FS_PORT);
 235
 236                 call->count -= count;
 237                 if (call->count > 0)
 238                         goto more_entries;
 239                 call->unmarshall++;
 240                 break;
 241         }
 242
 243         _leave(" = 0 [done]");
 244         return 0;
 245 }
 246
 247 static void afs_vl_get_addrs_u_destructor(struct afs_call *call)
 248 {
 249         afs_put_server(call->net, (struct afs_server *)call->reply[0]);
 250         kfree(call->reply[1]);
 251         return afs_flat_call_destructor(call);
 252 }
 253
 254 /*
 255  * VL.GetAddrsU operation type.
 256  */
 257 static const struct afs_call_type afs_RXVLGetAddrsU = {
 258         .name           = "VL.GetAddrsU",
 259         .op             = afs_VL_GetAddrsU,
 260         .deliver        = afs_deliver_vl_get_addrs_u,
 261         .destructor     = afs_vl_get_addrs_u_destructor,
 262 };
 263
 264 /*
 265  * Dispatch an operation to get the addresses for a server, where the server is
 266  * nominated by UUID.
 267  */
 268 struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
 269                                          const uuid_t *uuid)
 270 {
 271         struct afs_ListAddrByAttributes__xdr *r;
 272         const struct afs_uuid *u = (const struct afs_uuid *)uuid;
 273         struct afs_call *call;
 274         struct afs_net *net = vc->cell->net;
 275         __be32 *bp;
 276         int i;
 277
 278         _enter("");
 279
 280         call = afs_alloc_flat_call(net, &afs_RXVLGetAddrsU,
 281                                    sizeof(__be32) + sizeof(struct afs_ListAddrByAttributes__xdr),
 282                                    sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 283         if (!call)
 284                 return ERR_PTR(-ENOMEM);
 285
 286         call->key = vc->key;
 287         call->reply[0] = NULL;
 288         call->ret_reply0 = true;
 289
 290         /* Marshall the parameters */
 291         bp = call->request;
 292         *bp++ = htonl(VLGETADDRSU);
 293         r = (struct afs_ListAddrByAttributes__xdr *)bp;
 294         r->Mask         = htonl(AFS_VLADDR_UUID);
 295         r->ipaddr       = 0;
 296         r->index        = 0;
 297         r->spare        = 0;
 298         r->uuid.time_low                        = u->time_low;
 299         r->uuid.time_mid                        = htonl(ntohs(u->time_mid));
 300         r->uuid.time_hi_and_version             = htonl(ntohs(u->time_hi_and_version));
 301         r->uuid.clock_seq_hi_and_reserved       = htonl(u->clock_seq_hi_and_reserved);
 302         r->uuid.clock_seq_low                   = htonl(u->clock_seq_low);
 303         for (i = 0; i < 6; i++)
 304                 r->uuid.node[i] = htonl(u->node[i]);
 305
 306         trace_afs_make_vl_call(call);
 307         return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
 308 }
 309
 310 /*
 311  * Deliver reply data to an VL.GetCapabilities operation.
 312  */
 313 static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 314 {
 315         u32 count;
 316         int ret;
 317
 318         _enter("{%u,%zu/%u}",
 319                call->unmarshall, iov_iter_count(call->_iter), call->count);
 320
 321         switch (call->unmarshall) {
 322         case 0:
 323                 afs_extract_to_tmp(call);
 324                 call->unmarshall++;
 325
 326                 /* Extract the capabilities word count */
 327         case 1:
 328                 ret = afs_extract_data(call, true);
 329                 if (ret < 0)
 330                         return ret;
 331
 332                 count = ntohl(call->tmp);
 333                 call->count = count;
 334                 call->count2 = count;
 335
 336                 call->unmarshall++;
 337                 afs_extract_discard(call, count * sizeof(__be32));
 338
 339                 /* Extract capabilities words */
 340         case 2:
 341                 ret = afs_extract_data(call, false);
 342                 if (ret < 0)
 343                         return ret;
 344
 345                 /* TODO: Examine capabilities */
 346
 347                 call->unmarshall++;
 348                 break;
 349         }
 350
 351         _leave(" = 0 [done]");
 352         return 0;
 353 }
 354
 355 static void afs_destroy_vl_get_capabilities(struct afs_call *call)
 356 {
 357         struct afs_vlserver *server = call->reply[0];
 358
 359         afs_put_vlserver(call->net, server);
 360         afs_flat_call_destructor(call);
 361 }
 362
 363 /*
 364  * VL.GetCapabilities operation type
 365  */
 366 static const struct afs_call_type afs_RXVLGetCapabilities = {
 367         .name           = "VL.GetCapabilities",
 368         .op             = afs_VL_GetCapabilities,
 369         .deliver        = afs_deliver_vl_get_capabilities,
 370         .done           = afs_vlserver_probe_result,
 371         .destructor     = afs_destroy_vl_get_capabilities,
 372 };
 373
 374 /*
 375  * Probe a volume server for the capabilities that it supports.  This can
 376  * return up to 196 words.
 377  *
 378  * We use this to probe for service upgrade to determine what the server at the
 379  * other end supports.
 380  */
 381 int afs_vl_get_capabilities(struct afs_net *net,
 382                             struct afs_addr_cursor *ac,
 383                             struct key *key,
 384                             struct afs_vlserver *server,
 385                             unsigned int server_index,
 386                             bool async)
 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 -ENOMEM;
 396
 397         call->key = key;
 398         call->reply[0] = afs_get_vlserver(server);
 399         call->reply[1] = (void *)(long)server_index;
 400         call->upgrade = true;
 401         call->want_reply_time = true;
 402
 403         /* marshall the parameters */
 404         bp = call->request;
 405         *bp++ = htonl(VLGETCAPABILITIES);
 406
 407         /* Can't take a ref on server */
 408         trace_afs_make_vl_call(call);
 409         return afs_make_call(ac, call, GFP_KERNEL, async);
 410 }
 411
 412 /*
 413  * Deliver reply data to a YFSVL.GetEndpoints call.
 414  *
 415  *      GetEndpoints(IN yfsServerAttributes *attr,
 416  *                   OUT opr_uuid *uuid,
 417  *                   OUT afs_int32 *uniquifier,
 418  *                   OUT endpoints *fsEndpoints,
 419  *                   OUT endpoints *volEndpoints)
 420  */
 421 static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 422 {
 423         struct afs_addr_list *alist;
 424         __be32 *bp;
 425         u32 uniquifier, size;
 426         int ret;
 427
 428         _enter("{%u,%zu,%u}",
 429                call->unmarshall, iov_iter_count(call->_iter), call->count2);
 430
 431         switch (call->unmarshall) {
 432         case 0:
 433                 afs_extract_to_buf(call, sizeof(uuid_t) + 3 * sizeof(__be32));
 434                 call->unmarshall = 1;
 435
 436                 /* Extract the returned uuid, uniquifier, fsEndpoints count and
 437                  * either the first fsEndpoint type or the volEndpoints
 438                  * count if there are no fsEndpoints. */
 439         case 1:
 440                 ret = afs_extract_data(call, true);
 441                 if (ret < 0)
 442                         return ret;
 443
 444                 bp = call->buffer + sizeof(uuid_t);
 445                 uniquifier      = ntohl(*bp++);
 446                 call->count     = ntohl(*bp++);
 447                 call->count2    = ntohl(*bp); /* Type or next count */
 448
 449                 if (call->count > YFS_MAXENDPOINTS)
 450                         return afs_protocol_error(call, -EBADMSG,
 451                                                   afs_eproto_yvl_fsendpt_num);
 452
 453                 alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT);
 454                 if (!alist)
 455                         return -ENOMEM;
 456                 alist->version = uniquifier;
 457                 call->reply[0] = alist;
 458
 459                 if (call->count == 0)
 460                         goto extract_volendpoints;
 461
 462         next_fsendpoint:
 463                 switch (call->count2) {
 464                 case YFS_ENDPOINT_IPV4:
 465                         size = sizeof(__be32) * (1 + 1 + 1);
 466                         break;
 467                 case YFS_ENDPOINT_IPV6:
 468                         size = sizeof(__be32) * (1 + 4 + 1);
 469                         break;
 470                 default:
 471                         return afs_protocol_error(call, -EBADMSG,
 472                                                   afs_eproto_yvl_fsendpt_type);
 473                 }
 474
 475                 size += sizeof(__be32);
 476                 afs_extract_to_buf(call, size);
 477                 call->unmarshall = 2;
 478
 479                 /* Extract fsEndpoints[] entries */
 480         case 2:
 481                 ret = afs_extract_data(call, true);
 482                 if (ret < 0)
 483                         return ret;
 484
 485                 alist = call->reply[0];
 486                 bp = call->buffer;
 487                 switch (call->count2) {
 488                 case YFS_ENDPOINT_IPV4:
 489                         if (ntohl(bp[0]) != sizeof(__be32) * 2)
 490                                 return afs_protocol_error(call, -EBADMSG,
 491                                                           afs_eproto_yvl_fsendpt4_len);
 492                         afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2]));
 493                         bp += 3;
 494                         break;
 495                 case YFS_ENDPOINT_IPV6:
 496                         if (ntohl(bp[0]) != sizeof(__be32) * 5)
 497                                 return afs_protocol_error(call, -EBADMSG,
 498                                                           afs_eproto_yvl_fsendpt6_len);
 499                         afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5]));
 500                         bp += 6;
 501                         break;
 502                 default:
 503                         return afs_protocol_error(call, -EBADMSG,
 504                                                   afs_eproto_yvl_fsendpt_type);
 505                 }
 506
 507                 /* Got either the type of the next entry or the count of
 508                  * volEndpoints if no more fsEndpoints.
 509                  */
 510                 call->count2 = ntohl(*bp++);
 511
 512                 call->count--;
 513                 if (call->count > 0)
 514                         goto next_fsendpoint;
 515
 516         extract_volendpoints:
 517                 /* Extract the list of volEndpoints. */
 518                 call->count = call->count2;
 519                 if (!call->count)
 520                         goto end;
 521                 if (call->count > YFS_MAXENDPOINTS)
 522                         return afs_protocol_error(call, -EBADMSG,
 523                                                   afs_eproto_yvl_vlendpt_type);
 524
 525                 afs_extract_to_buf(call, 1 * sizeof(__be32));
 526                 call->unmarshall = 3;
 527
 528                 /* Extract the type of volEndpoints[0].  Normally we would
 529                  * extract the type of the next endpoint when we extract the
 530                  * data of the current one, but this is the first...
 531                  */
 532         case 3:
 533                 ret = afs_extract_data(call, true);
 534                 if (ret < 0)
 535                         return ret;
 536
 537                 bp = call->buffer;
 538
 539         next_volendpoint:
 540                 call->count2 = ntohl(*bp++);
 541                 switch (call->count2) {
 542                 case YFS_ENDPOINT_IPV4:
 543                         size = sizeof(__be32) * (1 + 1 + 1);
 544                         break;
 545                 case YFS_ENDPOINT_IPV6:
 546                         size = sizeof(__be32) * (1 + 4 + 1);
 547                         break;
 548                 default:
 549                         return afs_protocol_error(call, -EBADMSG,
 550                                                   afs_eproto_yvl_vlendpt_type);
 551                 }
 552
 553                 if (call->count > 1)
 554                         size += sizeof(__be32); /* Get next type too */
 555                 afs_extract_to_buf(call, size);
 556                 call->unmarshall = 4;
 557
 558                 /* Extract volEndpoints[] entries */
 559         case 4:
 560                 ret = afs_extract_data(call, true);
 561                 if (ret < 0)
 562                         return ret;
 563
 564                 bp = call->buffer;
 565                 switch (call->count2) {
 566                 case YFS_ENDPOINT_IPV4:
 567                         if (ntohl(bp[0]) != sizeof(__be32) * 2)
 568                                 return afs_protocol_error(call, -EBADMSG,
 569                                                           afs_eproto_yvl_vlendpt4_len);
 570                         bp += 3;
 571                         break;
 572                 case YFS_ENDPOINT_IPV6:
 573                         if (ntohl(bp[0]) != sizeof(__be32) * 5)
 574                                 return afs_protocol_error(call, -EBADMSG,
 575                                                           afs_eproto_yvl_vlendpt6_len);
 576                         bp += 6;
 577                         break;
 578                 default:
 579                         return afs_protocol_error(call, -EBADMSG,
 580                                                   afs_eproto_yvl_vlendpt_type);
 581                 }
 582
 583                 /* Got either the type of the next entry or the count of
 584                  * volEndpoints if no more fsEndpoints.
 585                  */
 586                 call->count--;
 587                 if (call->count > 0)
 588                         goto next_volendpoint;
 589
 590         end:
 591                 afs_extract_discard(call, 0);
 592                 call->unmarshall = 5;
 593
 594                 /* Done */
 595         case 5:
 596                 ret = afs_extract_data(call, false);
 597                 if (ret < 0)
 598                         return ret;
 599                 call->unmarshall = 6;
 600
 601         case 6:
 602                 break;
 603         }
 604
 605         alist = call->reply[0];
 606         _leave(" = 0 [done]");
 607         return 0;
 608 }
 609
 610 /*
 611  * YFSVL.GetEndpoints operation type.
 612  */
 613 static const struct afs_call_type afs_YFSVLGetEndpoints = {
 614         .name           = "YFSVL.GetEndpoints",
 615         .op             = afs_YFSVL_GetEndpoints,
 616         .deliver        = afs_deliver_yfsvl_get_endpoints,
 617         .destructor     = afs_vl_get_addrs_u_destructor,
 618 };
 619
 620 /*
 621  * Dispatch an operation to get the addresses for a server, where the server is
 622  * nominated by UUID.
 623  */
 624 struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
 625                                               const uuid_t *uuid)
 626 {
 627         struct afs_call *call;
 628         struct afs_net *net = vc->cell->net;
 629         __be32 *bp;
 630
 631         _enter("");
 632
 633         call = afs_alloc_flat_call(net, &afs_YFSVLGetEndpoints,
 634                                    sizeof(__be32) * 2 + sizeof(*uuid),
 635                                    sizeof(struct in6_addr) + sizeof(__be32) * 3);
 636         if (!call)
 637                 return ERR_PTR(-ENOMEM);
 638
 639         call->key = vc->key;
 640         call->reply[0] = NULL;
 641         call->ret_reply0 = true;
 642
 643         /* Marshall the parameters */
 644         bp = call->request;
 645         *bp++ = htonl(YVLGETENDPOINTS);
 646         *bp++ = htonl(YFS_SERVER_UUID);
 647         memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */
 648
 649         trace_afs_make_vl_call(call);
 650         return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
 651 }