fs/afs/vlclient.c

   1 /* vlclient.c: 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/init.h>
  13 #include <linux/sched.h>
  14 #include <rxrpc/rxrpc.h>
  15 #include <rxrpc/transport.h>
  16 #include <rxrpc/connection.h>
  17 #include <rxrpc/call.h>
  18 #include "server.h"
  19 #include "volume.h"
  20 #include "vlclient.h"
  21 #include "kafsasyncd.h"
  22 #include "kafstimod.h"
  23 #include "errors.h"
  24 #include "internal.h"
  25
  26 #define VLGETENTRYBYID          503     /* AFS Get Cache Entry By ID operation ID */
  27 #define VLGETENTRYBYNAME        504     /* AFS Get Cache Entry By Name operation ID */
  28 #define VLPROBE                 514     /* AFS Probe Volume Location Service operation ID */
  29
  30 static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call);
  31 static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call);
  32
  33 /*****************************************************************************/
  34 /*
  35  * map afs VL abort codes to/from Linux error codes
  36  * - called with call->lock held
  37  */
  38 static void afs_rxvl_aemap(struct rxrpc_call *call)
  39 {
  40         int err;
  41
  42         _enter("{%u,%u,%d}",
  43                call->app_err_state, call->app_abort_code, call->app_errno);
  44
  45         switch (call->app_err_state) {
  46         case RXRPC_ESTATE_LOCAL_ABORT:
  47                 call->app_abort_code = -call->app_errno;
  48                 return;
  49
  50         case RXRPC_ESTATE_PEER_ABORT:
  51                 switch (call->app_abort_code) {
  52                 case AFSVL_IDEXIST:             err = -EEXIST;          break;
  53                 case AFSVL_IO:                  err = -EREMOTEIO;       break;
  54                 case AFSVL_NAMEEXIST:           err = -EEXIST;          break;
  55                 case AFSVL_CREATEFAIL:          err = -EREMOTEIO;       break;
  56                 case AFSVL_NOENT:               err = -ENOMEDIUM;       break;
  57                 case AFSVL_EMPTY:               err = -ENOMEDIUM;       break;
  58                 case AFSVL_ENTDELETED:          err = -ENOMEDIUM;       break;
  59                 case AFSVL_BADNAME:             err = -EINVAL;          break;
  60                 case AFSVL_BADINDEX:            err = -EINVAL;          break;
  61                 case AFSVL_BADVOLTYPE:          err = -EINVAL;          break;
  62                 case AFSVL_BADSERVER:           err = -EINVAL;          break;
  63                 case AFSVL_BADPARTITION:        err = -EINVAL;          break;
  64                 case AFSVL_REPSFULL:            err = -EFBIG;           break;
  65                 case AFSVL_NOREPSERVER:         err = -ENOENT;          break;
  66                 case AFSVL_DUPREPSERVER:        err = -EEXIST;          break;
  67                 case AFSVL_RWNOTFOUND:          err = -ENOENT;          break;
  68                 case AFSVL_BADREFCOUNT:         err = -EINVAL;          break;
  69                 case AFSVL_SIZEEXCEEDED:        err = -EINVAL;          break;
  70                 case AFSVL_BADENTRY:            err = -EINVAL;          break;
  71                 case AFSVL_BADVOLIDBUMP:        err = -EINVAL;          break;
  72                 case AFSVL_IDALREADYHASHED:     err = -EINVAL;          break;
  73                 case AFSVL_ENTRYLOCKED:         err = -EBUSY;           break;
  74                 case AFSVL_BADVOLOPER:          err = -EBADRQC;         break;
  75                 case AFSVL_BADRELLOCKTYPE:      err = -EINVAL;          break;
  76                 case AFSVL_RERELEASE:           err = -EREMOTEIO;       break;
  77                 case AFSVL_BADSERVERFLAG:       err = -EINVAL;          break;
  78                 case AFSVL_PERM:                err = -EACCES;          break;
  79                 case AFSVL_NOMEM:               err = -EREMOTEIO;       break;
  80                 default:
  81                         err = afs_abort_to_error(call->app_abort_code);
  82                         break;
  83                 }
  84                 call->app_errno = err;
  85                 return;
  86
  87         default:
  88                 return;
  89         }
  90 } /* end afs_rxvl_aemap() */
  91
  92 #if 0
  93 /*****************************************************************************/
  94 /*
  95  * probe a volume location server to see if it is still alive -- unused
  96  */
  97 static int afs_rxvl_probe(struct afs_server *server, int alloc_flags)
  98 {
  99         struct rxrpc_connection *conn;
 100         struct rxrpc_call *call;
 101         struct kvec piov[1];
 102         size_t sent;
 103         int ret;
 104         __be32 param[1];
 105
 106         DECLARE_WAITQUEUE(myself, current);
 107
 108         /* get hold of the vlserver connection */
 109         ret = afs_server_get_vlconn(server, &conn);
 110         if (ret < 0)
 111                 goto out;
 112
 113         /* create a call through that connection */
 114         ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
 115         if (ret < 0) {
 116                 printk("kAFS: Unable to create call: %d\n", ret);
 117                 goto out_put_conn;
 118         }
 119         call->app_opcode = VLPROBE;
 120
 121         /* we want to get event notifications from the call */
 122         add_wait_queue(&call->waitq, &myself);
 123
 124         /* marshall the parameters */
 125         param[0] = htonl(VLPROBE);
 126         piov[0].iov_len = sizeof(param);
 127         piov[0].iov_base = param;
 128
 129         /* send the parameters to the server */
 130         ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET,
 131                                     alloc_flags, 0, &sent);
 132         if (ret < 0)
 133                 goto abort;
 134
 135         /* wait for the reply to completely arrive */
 136         for (;;) {
 137                 set_current_state(TASK_INTERRUPTIBLE);
 138                 if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY ||
 139                     signal_pending(current))
 140                         break;
 141                 schedule();
 142         }
 143         set_current_state(TASK_RUNNING);
 144
 145         ret = -EINTR;
 146         if (signal_pending(current))
 147                 goto abort;
 148
 149         switch (call->app_call_state) {
 150         case RXRPC_CSTATE_ERROR:
 151                 ret = call->app_errno;
 152                 goto out_unwait;
 153
 154         case RXRPC_CSTATE_CLNT_GOT_REPLY:
 155                 ret = 0;
 156                 goto out_unwait;
 157
 158         default:
 159                 BUG();
 160         }
 161
 162  abort:
 163         set_current_state(TASK_UNINTERRUPTIBLE);
 164         rxrpc_call_abort(call, ret);
 165         schedule();
 166
 167  out_unwait:
 168         set_current_state(TASK_RUNNING);
 169         remove_wait_queue(&call->waitq, &myself);
 170         rxrpc_put_call(call);
 171  out_put_conn:
 172         rxrpc_put_connection(conn);
 173  out:
 174         return ret;
 175
 176 } /* end afs_rxvl_probe() */
 177 #endif
 178
 179 /*****************************************************************************/
 180 /*
 181  * look up a volume location database entry by name
 182  */
 183 int afs_rxvl_get_entry_by_name(struct afs_server *server,
 184                                const char *volname,
 185                                unsigned volnamesz,
 186                                struct afs_cache_vlocation *entry)
 187 {
 188         DECLARE_WAITQUEUE(myself, current);
 189
 190         struct rxrpc_connection *conn;
 191         struct rxrpc_call *call;
 192         struct kvec piov[3];
 193         unsigned tmp;
 194         size_t sent;
 195         int ret, loop;
 196         __be32 *bp, param[2], zero;
 197
 198         _enter(",%*.*s,%u,", volnamesz, volnamesz, volname, volnamesz);
 199
 200         memset(entry, 0, sizeof(*entry));
 201
 202         /* get hold of the vlserver connection */
 203         ret = afs_server_get_vlconn(server, &conn);
 204         if (ret < 0)
 205                 goto out;
 206
 207         /* create a call through that connection */
 208         ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
 209         if (ret < 0) {
 210                 printk("kAFS: Unable to create call: %d\n", ret);
 211                 goto out_put_conn;
 212         }
 213         call->app_opcode = VLGETENTRYBYNAME;
 214
 215         /* we want to get event notifications from the call */
 216         add_wait_queue(&call->waitq, &myself);
 217
 218         /* marshall the parameters */
 219         piov[1].iov_len = volnamesz;
 220         piov[1].iov_base = (char *) volname;
 221
 222         zero = 0;
 223         piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3;
 224         piov[2].iov_base = &zero;
 225
 226         param[0] = htonl(VLGETENTRYBYNAME);
 227         param[1] = htonl(piov[1].iov_len);
 228
 229         piov[0].iov_len = sizeof(param);
 230         piov[0].iov_base = param;
 231
 232         /* send the parameters to the server */
 233         ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS,
 234                                     0, &sent);
 235         if (ret < 0)
 236                 goto abort;
 237
 238         /* wait for the reply to completely arrive */
 239         bp = rxrpc_call_alloc_scratch(call, 384);
 240
 241         ret = rxrpc_call_read_data(call, bp, 384,
 242                                    RXRPC_CALL_READ_BLOCK |
 243                                    RXRPC_CALL_READ_ALL);
 244         if (ret < 0) {
 245                 if (ret == -ECONNABORTED) {
 246                         ret = call->app_errno;
 247                         goto out_unwait;
 248                 }
 249                 goto abort;
 250         }
 251
 252         /* unmarshall the reply */
 253         for (loop = 0; loop < 64; loop++)
 254                 entry->name[loop] = ntohl(*bp++);
 255         bp++; /* final NUL */
 256
 257         bp++; /* type */
 258         entry->nservers = ntohl(*bp++);
 259
 260         for (loop = 0; loop < 8; loop++)
 261                 entry->servers[loop].s_addr = *bp++;
 262
 263         bp += 8; /* partition IDs */
 264
 265         for (loop = 0; loop < 8; loop++) {
 266                 tmp = ntohl(*bp++);
 267                 if (tmp & AFS_VLSF_RWVOL)
 268                         entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
 269                 if (tmp & AFS_VLSF_ROVOL)
 270                         entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
 271                 if (tmp & AFS_VLSF_BACKVOL)
 272                         entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
 273         }
 274
 275         entry->vid[0] = ntohl(*bp++);
 276         entry->vid[1] = ntohl(*bp++);
 277         entry->vid[2] = ntohl(*bp++);
 278
 279         bp++; /* clone ID */
 280
 281         tmp = ntohl(*bp++); /* flags */
 282         if (tmp & AFS_VLF_RWEXISTS)
 283                 entry->vidmask |= AFS_VOL_VTM_RW;
 284         if (tmp & AFS_VLF_ROEXISTS)
 285                 entry->vidmask |= AFS_VOL_VTM_RO;
 286         if (tmp & AFS_VLF_BACKEXISTS)
 287                 entry->vidmask |= AFS_VOL_VTM_BAK;
 288
 289         ret = -ENOMEDIUM;
 290         if (!entry->vidmask)
 291                 goto abort;
 292
 293         /* success */
 294         entry->rtime = get_seconds();
 295         ret = 0;
 296
 297  out_unwait:
 298         set_current_state(TASK_RUNNING);
 299         remove_wait_queue(&call->waitq, &myself);
 300         rxrpc_put_call(call);
 301  out_put_conn:
 302         rxrpc_put_connection(conn);
 303  out:
 304         _leave(" = %d", ret);
 305         return ret;
 306
 307  abort:
 308         set_current_state(TASK_UNINTERRUPTIBLE);
 309         rxrpc_call_abort(call, ret);
 310         schedule();
 311         goto out_unwait;
 312 } /* end afs_rxvl_get_entry_by_name() */
 313
 314 /*****************************************************************************/
 315 /*
 316  * look up a volume location database entry by ID
 317  */
 318 int afs_rxvl_get_entry_by_id(struct afs_server *server,
 319                              afs_volid_t volid,
 320                              afs_voltype_t voltype,
 321                              struct afs_cache_vlocation *entry)
 322 {
 323         DECLARE_WAITQUEUE(myself, current);
 324
 325         struct rxrpc_connection *conn;
 326         struct rxrpc_call *call;
 327         struct kvec piov[1];
 328         unsigned tmp;
 329         size_t sent;
 330         int ret, loop;
 331         __be32 *bp, param[3];
 332
 333         _enter(",%x,%d,", volid, voltype);
 334
 335         memset(entry, 0, sizeof(*entry));
 336
 337         /* get hold of the vlserver connection */
 338         ret = afs_server_get_vlconn(server, &conn);
 339         if (ret < 0)
 340                 goto out;
 341
 342         /* create a call through that connection */
 343         ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
 344         if (ret < 0) {
 345                 printk("kAFS: Unable to create call: %d\n", ret);
 346                 goto out_put_conn;
 347         }
 348         call->app_opcode = VLGETENTRYBYID;
 349
 350         /* we want to get event notifications from the call */
 351         add_wait_queue(&call->waitq, &myself);
 352
 353         /* marshall the parameters */
 354         param[0] = htonl(VLGETENTRYBYID);
 355         param[1] = htonl(volid);
 356         param[2] = htonl(voltype);
 357
 358         piov[0].iov_len = sizeof(param);
 359         piov[0].iov_base = param;
 360
 361         /* send the parameters to the server */
 362         ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
 363                                     0, &sent);
 364         if (ret < 0)
 365                 goto abort;
 366
 367         /* wait for the reply to completely arrive */
 368         bp = rxrpc_call_alloc_scratch(call, 384);
 369
 370         ret = rxrpc_call_read_data(call, bp, 384,
 371                                    RXRPC_CALL_READ_BLOCK |
 372                                    RXRPC_CALL_READ_ALL);
 373         if (ret < 0) {
 374                 if (ret == -ECONNABORTED) {
 375                         ret = call->app_errno;
 376                         goto out_unwait;
 377                 }
 378                 goto abort;
 379         }
 380
 381         /* unmarshall the reply */
 382         for (loop = 0; loop < 64; loop++)
 383                 entry->name[loop] = ntohl(*bp++);
 384         bp++; /* final NUL */
 385
 386         bp++; /* type */
 387         entry->nservers = ntohl(*bp++);
 388
 389         for (loop = 0; loop < 8; loop++)
 390                 entry->servers[loop].s_addr = *bp++;
 391
 392         bp += 8; /* partition IDs */
 393
 394         for (loop = 0; loop < 8; loop++) {
 395                 tmp = ntohl(*bp++);
 396                 if (tmp & AFS_VLSF_RWVOL)
 397                         entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
 398                 if (tmp & AFS_VLSF_ROVOL)
 399                         entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
 400                 if (tmp & AFS_VLSF_BACKVOL)
 401                         entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
 402         }
 403
 404         entry->vid[0] = ntohl(*bp++);
 405         entry->vid[1] = ntohl(*bp++);
 406         entry->vid[2] = ntohl(*bp++);
 407
 408         bp++; /* clone ID */
 409
 410         tmp = ntohl(*bp++); /* flags */
 411         if (tmp & AFS_VLF_RWEXISTS)
 412                 entry->vidmask |= AFS_VOL_VTM_RW;
 413         if (tmp & AFS_VLF_ROEXISTS)
 414                 entry->vidmask |= AFS_VOL_VTM_RO;
 415         if (tmp & AFS_VLF_BACKEXISTS)
 416                 entry->vidmask |= AFS_VOL_VTM_BAK;
 417
 418         ret = -ENOMEDIUM;
 419         if (!entry->vidmask)
 420                 goto abort;
 421
 422 #if 0 /* TODO: remove */
 423         entry->nservers = 3;
 424         entry->servers[0].s_addr = htonl(0xac101249);
 425         entry->servers[1].s_addr = htonl(0xac101243);
 426         entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
 427
 428         entry->srvtmask[0] = AFS_VOL_VTM_RO;
 429         entry->srvtmask[1] = AFS_VOL_VTM_RO;
 430         entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
 431 #endif
 432
 433         /* success */
 434         entry->rtime = get_seconds();
 435         ret = 0;
 436
 437  out_unwait:
 438         set_current_state(TASK_RUNNING);
 439         remove_wait_queue(&call->waitq, &myself);
 440         rxrpc_put_call(call);
 441  out_put_conn:
 442         rxrpc_put_connection(conn);
 443  out:
 444         _leave(" = %d", ret);
 445         return ret;
 446
 447  abort:
 448         set_current_state(TASK_UNINTERRUPTIBLE);
 449         rxrpc_call_abort(call, ret);
 450         schedule();
 451         goto out_unwait;
 452 } /* end afs_rxvl_get_entry_by_id() */
 453
 454 /*****************************************************************************/
 455 /*
 456  * look up a volume location database entry by ID asynchronously
 457  */
 458 int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op,
 459                                    afs_volid_t volid,
 460                                    afs_voltype_t voltype)
 461 {
 462         struct rxrpc_connection *conn;
 463         struct rxrpc_call *call;
 464         struct kvec piov[1];
 465         size_t sent;
 466         int ret;
 467         __be32 param[3];
 468
 469         _enter(",%x,%d,", volid, voltype);
 470
 471         /* get hold of the vlserver connection */
 472         ret = afs_server_get_vlconn(op->server, &conn);
 473         if (ret < 0) {
 474                 _leave(" = %d", ret);
 475                 return ret;
 476         }
 477
 478         /* create a call through that connection */
 479         ret = rxrpc_create_call(conn,
 480                                 afs_rxvl_get_entry_by_id_attn,
 481                                 afs_rxvl_get_entry_by_id_error,
 482                                 afs_rxvl_aemap,
 483                                 &op->call);
 484         rxrpc_put_connection(conn);
 485
 486         if (ret < 0) {
 487                 printk("kAFS: Unable to create call: %d\n", ret);
 488                 _leave(" = %d", ret);
 489                 return ret;
 490         }
 491
 492         op->call->app_opcode = VLGETENTRYBYID;
 493         op->call->app_user = op;
 494
 495         call = op->call;
 496         rxrpc_get_call(call);
 497
 498         /* send event notifications from the call to kafsasyncd */
 499         afs_kafsasyncd_begin_op(op);
 500
 501         /* marshall the parameters */
 502         param[0] = htonl(VLGETENTRYBYID);
 503         param[1] = htonl(volid);
 504         param[2] = htonl(voltype);
 505
 506         piov[0].iov_len = sizeof(param);
 507         piov[0].iov_base = param;
 508
 509         /* allocate result read buffer in scratch space */
 510         call->app_scr_ptr = rxrpc_call_alloc_scratch(op->call, 384);
 511
 512         /* send the parameters to the server */
 513         ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
 514                                     0, &sent);
 515         if (ret < 0) {
 516                 rxrpc_call_abort(call, ret); /* handle from kafsasyncd */
 517                 ret = 0;
 518                 goto out;
 519         }
 520
 521         /* wait for the reply to completely arrive */
 522         ret = rxrpc_call_read_data(call, call->app_scr_ptr, 384, 0);
 523         switch (ret) {
 524         case 0:
 525         case -EAGAIN:
 526         case -ECONNABORTED:
 527                 ret = 0;
 528                 break;  /* all handled by kafsasyncd */
 529
 530         default:
 531                 rxrpc_call_abort(call, ret); /* make kafsasyncd handle it */
 532                 ret = 0;
 533                 break;
 534         }
 535
 536  out:
 537         rxrpc_put_call(call);
 538         _leave(" = %d", ret);
 539         return ret;
 540
 541 } /* end afs_rxvl_get_entry_by_id_async() */
 542
 543 /*****************************************************************************/
 544 /*
 545  * attend to the asynchronous get VLDB entry by ID
 546  */
 547 int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op,
 548                                     struct afs_cache_vlocation *entry)
 549 {
 550         __be32 *bp;
 551         __u32 tmp;
 552         int loop, ret;
 553
 554         _enter("{op=%p cst=%u}", op, op->call->app_call_state);
 555
 556         memset(entry, 0, sizeof(*entry));
 557
 558         if (op->call->app_call_state == RXRPC_CSTATE_COMPLETE) {
 559                 /* operation finished */
 560                 afs_kafsasyncd_terminate_op(op);
 561
 562                 bp = op->call->app_scr_ptr;
 563
 564                 /* unmarshall the reply */
 565                 for (loop = 0; loop < 64; loop++)
 566                         entry->name[loop] = ntohl(*bp++);
 567                 bp++; /* final NUL */
 568
 569                 bp++; /* type */
 570                 entry->nservers = ntohl(*bp++);
 571
 572                 for (loop = 0; loop < 8; loop++)
 573                         entry->servers[loop].s_addr = *bp++;
 574
 575                 bp += 8; /* partition IDs */
 576
 577                 for (loop = 0; loop < 8; loop++) {
 578                         tmp = ntohl(*bp++);
 579                         if (tmp & AFS_VLSF_RWVOL)
 580                                 entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
 581                         if (tmp & AFS_VLSF_ROVOL)
 582                                 entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
 583                         if (tmp & AFS_VLSF_BACKVOL)
 584                                 entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
 585                 }
 586
 587                 entry->vid[0] = ntohl(*bp++);
 588                 entry->vid[1] = ntohl(*bp++);
 589                 entry->vid[2] = ntohl(*bp++);
 590
 591                 bp++; /* clone ID */
 592
 593                 tmp = ntohl(*bp++); /* flags */
 594                 if (tmp & AFS_VLF_RWEXISTS)
 595                         entry->vidmask |= AFS_VOL_VTM_RW;
 596                 if (tmp & AFS_VLF_ROEXISTS)
 597                         entry->vidmask |= AFS_VOL_VTM_RO;
 598                 if (tmp & AFS_VLF_BACKEXISTS)
 599                         entry->vidmask |= AFS_VOL_VTM_BAK;
 600
 601                 ret = -ENOMEDIUM;
 602                 if (!entry->vidmask) {
 603                         rxrpc_call_abort(op->call, ret);
 604                         goto done;
 605                 }
 606
 607 #if 0 /* TODO: remove */
 608                 entry->nservers = 3;
 609                 entry->servers[0].s_addr = htonl(0xac101249);
 610                 entry->servers[1].s_addr = htonl(0xac101243);
 611                 entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
 612
 613                 entry->srvtmask[0] = AFS_VOL_VTM_RO;
 614                 entry->srvtmask[1] = AFS_VOL_VTM_RO;
 615                 entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
 616 #endif
 617
 618                 /* success */
 619                 entry->rtime = get_seconds();
 620                 ret = 0;
 621                 goto done;
 622         }
 623
 624         if (op->call->app_call_state == RXRPC_CSTATE_ERROR) {
 625                 /* operation error */
 626                 ret = op->call->app_errno;
 627                 goto done;
 628         }
 629
 630         _leave(" = -EAGAIN");
 631         return -EAGAIN;
 632
 633  done:
 634         rxrpc_put_call(op->call);
 635         op->call = NULL;
 636         _leave(" = %d", ret);
 637         return ret;
 638 } /* end afs_rxvl_get_entry_by_id_async2() */
 639
 640 /*****************************************************************************/
 641 /*
 642  * handle attention events on an async get-entry-by-ID op
 643  * - called from krxiod
 644  */
 645 static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call)
 646 {
 647         struct afs_async_op *op = call->app_user;
 648
 649         _enter("{op=%p cst=%u}", op, call->app_call_state);
 650
 651         switch (call->app_call_state) {
 652         case RXRPC_CSTATE_COMPLETE:
 653                 afs_kafsasyncd_attend_op(op);
 654                 break;
 655         case RXRPC_CSTATE_CLNT_RCV_REPLY:
 656                 if (call->app_async_read)
 657                         break;
 658         case RXRPC_CSTATE_CLNT_GOT_REPLY:
 659                 if (call->app_read_count == 0)
 660                         break;
 661                 printk("kAFS: Reply bigger than expected"
 662                        " {cst=%u asyn=%d mark=%Zu rdy=%Zu pr=%u%s}",
 663                        call->app_call_state,
 664                        call->app_async_read,
 665                        call->app_mark,
 666                        call->app_ready_qty,
 667                        call->pkt_rcv_count,
 668                        call->app_last_rcv ? " last" : "");
 669
 670                 rxrpc_call_abort(call, -EBADMSG);
 671                 break;
 672         default:
 673                 BUG();
 674         }
 675
 676         _leave("");
 677
 678 } /* end afs_rxvl_get_entry_by_id_attn() */
 679
 680 /*****************************************************************************/
 681 /*
 682  * handle error events on an async get-entry-by-ID op
 683  * - called from krxiod
 684  */
 685 static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call)
 686 {
 687         struct afs_async_op *op = call->app_user;
 688
 689         _enter("{op=%p cst=%u}", op, call->app_call_state);
 690
 691         afs_kafsasyncd_attend_op(op);
 692
 693         _leave("");
 694
 695 } /* end afs_rxvl_get_entry_by_id_error() */