lnet/klnds/ralnd/ralnd_cb.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2004 Cluster File Systems, Inc.
   5  *   Author: Eric Barton <eric@bartonsoftware.com>
   6  *
   7  *   This file is part of Lustre, http://www.lustre.org.
   8  *
   9  *   Lustre is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Lustre is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Lustre; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #include "ranal.h"
  25
  26 int
  27 kranal_dist(lib_nal_t *nal, ptl_nid_t nid, unsigned long *dist)
  28 {
  29         /* I would guess that if kranal_get_peer (nid) == NULL,
  30            and we're not routing, then 'nid' is very distant :) */
  31         if ( nal->libnal_ni.ni_pid.nid == nid ) {
  32                 *dist = 0;
  33         } else {
  34                 *dist = 1;
  35         }
  36
  37         return 0;
  38 }
  39
  40 void
  41 kranal_device_callback(RAP_INT32 devid)
  42 {
  43         kra_device_t *dev;
  44         int           i;
  45         unsigned long flags;
  46
  47         for (i = 0; i < kranal_data.kra_ndevs; i++) {
  48
  49                 dev = &kranal_data.kra_devices[i];
  50                 if (dev->rad_id != devid)
  51                         continue;
  52
  53                 spin_lock_irqsave(&dev->rad_lock, flags);
  54
  55                 if (!dev->rad_ready) {
  56                         dev->rad_ready = 1;
  57                         wake_up(&dev->rad_waitq);
  58                 }
  59
  60                 spin_unlock_irqrestore(&dev->rad_lock, flags);
  61                 return;
  62         }
  63
  64         CWARN("callback for unknown device %d\n", devid);
  65 }
  66
  67 void
  68 kranal_schedule_conn(kra_conn_t *conn)
  69 {
  70         kra_device_t    *dev = conn->rac_device;
  71         unsigned long    flags;
  72
  73         spin_lock_irqsave(&dev->rad_lock, flags);
  74
  75         if (!conn->rac_scheduled) {
  76                 kranal_conn_addref(conn);       /* +1 ref for scheduler */
  77                 conn->rac_scheduled = 1;
  78                 list_add_tail(&conn->rac_schedlist, &dev->rad_connq);
  79                 wake_up(&dev->rad_waitq);
  80         }
  81
  82         spin_unlock_irqrestore(&dev->rad_lock, flags);
  83 }
  84
  85 kra_tx_t *
  86 kranal_get_idle_tx (int may_block)
  87 {
  88         unsigned long  flags;
  89         kra_tx_t      *tx = NULL;
  90
  91         for (;;) {
  92                 spin_lock_irqsave(&kranal_data.kra_tx_lock, flags);
  93
  94                 /* "normal" descriptor is free */
  95                 if (!list_empty(&kranal_data.kra_idle_txs)) {
  96                         tx = list_entry(kranal_data.kra_idle_txs.next,
  97                                         kra_tx_t, tx_list);
  98                         break;
  99                 }
 100
 101                 if (!may_block) {
 102                         /* may dip into reserve pool */
 103                         if (list_empty(&kranal_data.kra_idle_nblk_txs)) {
 104                                 CERROR("reserved tx desc pool exhausted\n");
 105                                 break;
 106                         }
 107
 108                         tx = list_entry(kranal_data.kra_idle_nblk_txs.next,
 109                                         kra_tx_t, tx_list);
 110                         break;
 111                 }
 112
 113                 /* block for idle tx */
 114                 spin_unlock_irqrestore(&kranal_data.kra_tx_lock, flags);
 115
 116                 wait_event(kranal_data.kra_idle_tx_waitq,
 117                            !list_empty(&kranal_data.kra_idle_txs));
 118         }
 119
 120         if (tx != NULL) {
 121                 list_del(&tx->tx_list);
 122
 123                 /* Allocate a new completion cookie.  It might not be
 124                  * needed, but we've got a lock right now... */
 125                 tx->tx_cookie = kranal_data.kra_next_tx_cookie++;
 126
 127                 LASSERT (tx->tx_buftype == RANAL_BUF_NONE);
 128                 LASSERT (tx->tx_msg.ram_type == RANAL_MSG_NONE);
 129                 LASSERT (tx->tx_conn == NULL);
 130                 LASSERT (tx->tx_libmsg[0] == NULL);
 131                 LASSERT (tx->tx_libmsg[1] == NULL);
 132         }
 133
 134         spin_unlock_irqrestore(&kranal_data.kra_tx_lock, flags);
 135
 136         return tx;
 137 }
 138
 139 void
 140 kranal_init_msg(kra_msg_t *msg, int type)
 141 {
 142         msg->ram_magic = RANAL_MSG_MAGIC;
 143         msg->ram_version = RANAL_MSG_VERSION;
 144         msg->ram_type = type;
 145         msg->ram_srcnid = kranal_lib.libnal_ni.ni_pid.nid;
 146         /* ram_connstamp gets set when FMA is sent */
 147 }
 148
 149 kra_tx_t *
 150 kranal_new_tx_msg (int may_block, int type)
 151 {
 152         kra_tx_t *tx = kranal_get_idle_tx(may_block);
 153
 154         if (tx == NULL)
 155                 return NULL;
 156
 157         kranal_init_msg(&tx->tx_msg, type);
 158         return tx;
 159 }
 160
 161 int
 162 kranal_setup_immediate_buffer (kra_tx_t *tx, int niov, struct iovec *iov,
 163                                int offset, int nob)
 164
 165 {
 166         /* For now this is almost identical to kranal_setup_virt_buffer, but we
 167          * could "flatten" the payload into a single contiguous buffer ready
 168          * for sending direct over an FMA if we ever needed to. */
 169
 170         LASSERT (nob > 0);
 171         LASSERT (niov > 0);
 172         LASSERT (tx->tx_buftype == RANAL_BUF_NONE);
 173
 174         while (offset >= iov->iov_len) {
 175                 offset -= iov->iov_len;
 176                 niov--;
 177                 iov++;
 178                 LASSERT (niov > 0);
 179         }
 180
 181         if (nob > iov->iov_len - offset) {
 182                 CERROR("Can't handle multiple vaddr fragments\n");
 183                 return -EMSGSIZE;
 184         }
 185
 186         tx->tx_buftype = RANAL_BUF_IMMEDIATE;
 187         tx->tx_nob = nob;
 188         tx->tx_buffer = (void *)(((unsigned long)iov->iov_base) + offset);
 189         return 0;
 190 }
 191
 192 int
 193 kranal_setup_virt_buffer (kra_tx_t *tx, int niov, struct iovec *iov,
 194                           int offset, int nob)
 195
 196 {
 197         LASSERT (nob > 0);
 198         LASSERT (niov > 0);
 199         LASSERT (tx->tx_buftype == RANAL_BUF_NONE);
 200
 201         while (offset >= iov->iov_len) {
 202                 offset -= iov->iov_len;
 203                 niov--;
 204                 iov++;
 205                 LASSERT (niov > 0);
 206         }
 207
 208         if (nob > iov->iov_len - offset) {
 209                 CERROR("Can't handle multiple vaddr fragments\n");
 210                 return -EMSGSIZE;
 211         }
 212
 213         tx->tx_buftype = RANAL_BUF_VIRT_UNMAPPED;
 214         tx->tx_nob = nob;
 215         tx->tx_buffer = (void *)(((unsigned long)iov->iov_base) + offset);
 216         return 0;
 217 }
 218
 219 int
 220 kranal_setup_phys_buffer (kra_tx_t *tx, int nkiov, ptl_kiov_t *kiov,
 221                           int offset, int nob)
 222 {
 223         RAP_PHYS_REGION *phys = tx->tx_phys;
 224         int              resid;
 225
 226         CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob);
 227
 228         LASSERT (nob > 0);
 229         LASSERT (nkiov > 0);
 230         LASSERT (tx->tx_buftype == RANAL_BUF_NONE);
 231
 232         while (offset >= kiov->kiov_len) {
 233                 offset -= kiov->kiov_len;
 234                 nkiov--;
 235                 kiov++;
 236                 LASSERT (nkiov > 0);
 237         }
 238
 239         tx->tx_buftype = RANAL_BUF_PHYS_UNMAPPED;
 240         tx->tx_nob = nob;
 241         tx->tx_buffer = (void *)((unsigned long)(kiov->kiov_offset + offset));
 242
 243         phys->Address = kranal_page2phys(kiov->kiov_page);
 244         phys++;
 245
 246         resid = nob - (kiov->kiov_len - offset);
 247         while (resid > 0) {
 248                 kiov++;
 249                 nkiov--;
 250                 LASSERT (nkiov > 0);
 251
 252                 if (kiov->kiov_offset != 0 ||
 253                     ((resid > PAGE_SIZE) &&
 254                      kiov->kiov_len < PAGE_SIZE)) {
 255                         /* Can't have gaps */
 256                         CERROR("Can't make payload contiguous in I/O VM:"
 257                                "page %d, offset %d, len %d \n",
 258                                phys - tx->tx_phys,
 259                                kiov->kiov_offset, kiov->kiov_len);
 260                         return -EINVAL;
 261                 }
 262
 263                 if ((phys - tx->tx_phys) == PTL_MD_MAX_IOV) {
 264                         CERROR ("payload too big (%d)\n", phys - tx->tx_phys);
 265                         return -EMSGSIZE;
 266                 }
 267
 268                 phys->Address = kranal_page2phys(kiov->kiov_page);
 269                 phys++;
 270
 271                 resid -= PAGE_SIZE;
 272         }
 273
 274         tx->tx_phys_npages = phys - tx->tx_phys;
 275         return 0;
 276 }
 277
 278 static inline int
 279 kranal_setup_rdma_buffer (kra_tx_t *tx, int niov,
 280                           struct iovec *iov, ptl_kiov_t *kiov,
 281                           int offset, int nob)
 282 {
 283         LASSERT ((iov == NULL) != (kiov == NULL));
 284
 285         if (kiov != NULL)
 286                 return kranal_setup_phys_buffer(tx, niov, kiov, offset, nob);
 287
 288         return kranal_setup_virt_buffer(tx, niov, iov, offset, nob);
 289 }
 290
 291 void
 292 kranal_map_buffer (kra_tx_t *tx)
 293 {
 294         kra_conn_t     *conn = tx->tx_conn;
 295         kra_device_t   *dev = conn->rac_device;
 296         RAP_RETURN      rrc;
 297
 298         LASSERT (current == dev->rad_scheduler);
 299
 300         switch (tx->tx_buftype) {
 301         default:
 302                 LBUG();
 303
 304         case RANAL_BUF_NONE:
 305         case RANAL_BUF_IMMEDIATE:
 306         case RANAL_BUF_PHYS_MAPPED:
 307         case RANAL_BUF_VIRT_MAPPED:
 308                 break;
 309
 310         case RANAL_BUF_PHYS_UNMAPPED:
 311                 rrc = RapkRegisterPhys(dev->rad_handle,
 312                                        tx->tx_phys, tx->tx_phys_npages,
 313                                        &tx->tx_map_key);
 314                 LASSERT (rrc == RAP_SUCCESS);
 315                 tx->tx_buftype = RANAL_BUF_PHYS_MAPPED;
 316                 break;
 317
 318         case RANAL_BUF_VIRT_UNMAPPED:
 319                 rrc = RapkRegisterMemory(dev->rad_handle,
 320                                          tx->tx_buffer, tx->tx_nob,
 321                                          &tx->tx_map_key);
 322                 LASSERT (rrc == RAP_SUCCESS);
 323                 tx->tx_buftype = RANAL_BUF_VIRT_MAPPED;
 324                 break;
 325         }
 326 }
 327
 328 void
 329 kranal_unmap_buffer (kra_tx_t *tx)
 330 {
 331         kra_device_t   *dev;
 332         RAP_RETURN      rrc;
 333
 334         switch (tx->tx_buftype) {
 335         default:
 336                 LBUG();
 337
 338         case RANAL_BUF_NONE:
 339         case RANAL_BUF_IMMEDIATE:
 340         case RANAL_BUF_PHYS_UNMAPPED:
 341         case RANAL_BUF_VIRT_UNMAPPED:
 342                 break;
 343
 344         case RANAL_BUF_PHYS_MAPPED:
 345                 LASSERT (tx->tx_conn != NULL);
 346                 dev = tx->tx_conn->rac_device;
 347                 LASSERT (current == dev->rad_scheduler);
 348                 rrc = RapkDeregisterMemory(dev->rad_handle, NULL,
 349                                            &tx->tx_map_key);
 350                 LASSERT (rrc == RAP_SUCCESS);
 351                 tx->tx_buftype = RANAL_BUF_PHYS_UNMAPPED;
 352                 break;
 353
 354         case RANAL_BUF_VIRT_MAPPED:
 355                 LASSERT (tx->tx_conn != NULL);
 356                 dev = tx->tx_conn->rac_device;
 357                 LASSERT (current == dev->rad_scheduler);
 358                 rrc = RapkDeregisterMemory(dev->rad_handle, tx->tx_buffer,
 359                                            &tx->tx_map_key);
 360                 LASSERT (rrc == RAP_SUCCESS);
 361                 tx->tx_buftype = RANAL_BUF_VIRT_UNMAPPED;
 362                 break;
 363         }
 364 }
 365
 366 void
 367 kranal_tx_done (kra_tx_t *tx, int completion)
 368 {
 369         ptl_err_t        ptlrc = (completion == 0) ? PTL_OK : PTL_FAIL;
 370         unsigned long    flags;
 371         int              i;
 372
 373         LASSERT (!in_interrupt());
 374
 375         kranal_unmap_buffer(tx);
 376
 377         for (i = 0; i < 2; i++) {
 378                 /* tx may have up to 2 libmsgs to finalise */
 379                 if (tx->tx_libmsg[i] == NULL)
 380                         continue;
 381
 382                 lib_finalize(&kranal_lib, NULL, tx->tx_libmsg[i], ptlrc);
 383                 tx->tx_libmsg[i] = NULL;
 384         }
 385
 386         tx->tx_buftype = RANAL_BUF_NONE;
 387         tx->tx_msg.ram_type = RANAL_MSG_NONE;
 388         tx->tx_conn = NULL;
 389
 390         spin_lock_irqsave(&kranal_data.kra_tx_lock, flags);
 391
 392         if (tx->tx_isnblk) {
 393                 list_add_tail(&tx->tx_list, &kranal_data.kra_idle_nblk_txs);
 394         } else {
 395                 list_add_tail(&tx->tx_list, &kranal_data.kra_idle_txs);
 396                 wake_up(&kranal_data.kra_idle_tx_waitq);
 397         }
 398
 399         spin_unlock_irqrestore(&kranal_data.kra_tx_lock, flags);
 400 }
 401
 402 kra_conn_t *
 403 kranal_find_conn_locked (kra_peer_t *peer)
 404 {
 405         struct list_head *tmp;
 406
 407         /* just return the first connection */
 408         list_for_each (tmp, &peer->rap_conns) {
 409                 return list_entry(tmp, kra_conn_t, rac_list);
 410         }
 411
 412         return NULL;
 413 }
 414
 415 void
 416 kranal_post_fma (kra_conn_t *conn, kra_tx_t *tx)
 417 {
 418         unsigned long    flags;
 419
 420         tx->tx_conn = conn;
 421
 422         spin_lock_irqsave(&conn->rac_lock, flags);
 423         list_add_tail(&tx->tx_list, &conn->rac_fmaq);
 424         tx->tx_qtime = jiffies;
 425         spin_unlock_irqrestore(&conn->rac_lock, flags);
 426
 427         kranal_schedule_conn(conn);
 428 }
 429
 430 void
 431 kranal_launch_tx (kra_tx_t *tx, ptl_nid_t nid)
 432 {
 433         unsigned long    flags;
 434         kra_peer_t      *peer;
 435         kra_conn_t      *conn;
 436         unsigned long    now;
 437         rwlock_t        *g_lock = &kranal_data.kra_global_lock;
 438
 439         /* If I get here, I've committed to send, so I complete the tx with
 440          * failure on any problems */
 441
 442         LASSERT (tx->tx_conn == NULL);          /* only set when assigned a conn */
 443
 444         read_lock(g_lock);
 445
 446         peer = kranal_find_peer_locked(nid);
 447         if (peer == NULL) {
 448                 read_unlock(g_lock);
 449                 kranal_tx_done(tx, -EHOSTUNREACH);
 450                 return;
 451         }
 452
 453         conn = kranal_find_conn_locked(peer);
 454         if (conn != NULL) {
 455                 kranal_post_fma(conn, tx);
 456                 read_unlock(g_lock);
 457                 return;
 458         }
 459
 460         /* Making one or more connections; I'll need a write lock... */
 461         read_unlock(g_lock);
 462         write_lock_irqsave(g_lock, flags);
 463
 464         peer = kranal_find_peer_locked(nid);
 465         if (peer == NULL) {
 466                 write_unlock_irqrestore(g_lock, flags);
 467                 kranal_tx_done(tx, -EHOSTUNREACH);
 468                 return;
 469         }
 470
 471         conn = kranal_find_conn_locked(peer);
 472         if (conn != NULL) {
 473                 /* Connection exists; queue message on it */
 474                 kranal_post_fma(conn, tx);
 475                 write_unlock_irqrestore(g_lock, flags);
 476                 return;
 477         }
 478
 479         LASSERT (peer->rap_persistence > 0);
 480
 481         if (!peer->rap_connecting) {
 482                 LASSERT (list_empty(&peer->rap_tx_queue));
 483
 484                 now = CURRENT_TIME;
 485                 if (now < peer->rap_reconnect_time) {
 486                         write_unlock_irqrestore(g_lock, flags);
 487                         kranal_tx_done(tx, -EHOSTUNREACH);
 488                         return;
 489                 }
 490
 491                 peer->rap_connecting = 1;
 492                 kranal_peer_addref(peer); /* extra ref for connd */
 493
 494                 spin_lock(&kranal_data.kra_connd_lock);
 495
 496                 list_add_tail(&peer->rap_connd_list,
 497                               &kranal_data.kra_connd_peers);
 498                 wake_up(&kranal_data.kra_connd_waitq);
 499
 500                 spin_unlock(&kranal_data.kra_connd_lock);
 501         }
 502
 503         /* A connection is being established; queue the message... */
 504         list_add_tail(&tx->tx_list, &peer->rap_tx_queue);
 505
 506         write_unlock_irqrestore(g_lock, flags);
 507 }
 508
 509 void
 510 kranal_rdma(kra_tx_t *tx, int type,
 511             kra_rdma_desc_t *sink, int nob, __u64 cookie)
 512 {
 513         kra_conn_t   *conn = tx->tx_conn;
 514         RAP_RETURN    rrc;
 515         unsigned long flags;
 516
 517         LASSERT (kranal_tx_mapped(tx));
 518         LASSERT (nob <= sink->rard_nob);
 519         LASSERT (nob <= tx->tx_nob);
 520
 521         /* No actual race with scheduler sending CLOSE (I'm she!) */
 522         LASSERT (current == conn->rac_device->rad_scheduler);
 523
 524         memset(&tx->tx_rdma_desc, 0, sizeof(tx->tx_rdma_desc));
 525         tx->tx_rdma_desc.SrcPtr.AddressBits = (__u64)((unsigned long)tx->tx_buffer);
 526         tx->tx_rdma_desc.SrcKey = tx->tx_map_key;
 527         tx->tx_rdma_desc.DstPtr = sink->rard_addr;
 528         tx->tx_rdma_desc.DstKey = sink->rard_key;
 529         tx->tx_rdma_desc.Length = nob;
 530         tx->tx_rdma_desc.AppPtr = tx;
 531
 532         /* prep final completion message */
 533         kranal_init_msg(&tx->tx_msg, type);
 534         tx->tx_msg.ram_u.completion.racm_cookie = cookie;
 535
 536         if (nob == 0) { /* Immediate completion */
 537                 kranal_post_fma(conn, tx);
 538                 return;
 539         }
 540
 541         LASSERT (!conn->rac_close_sent); /* Don't lie (CLOSE == RDMA idle) */
 542
 543         rrc = RapkPostRdma(conn->rac_rihandle, &tx->tx_rdma_desc);
 544         LASSERT (rrc == RAP_SUCCESS);
 545
 546         spin_lock_irqsave(&conn->rac_lock, flags);
 547         list_add_tail(&tx->tx_list, &conn->rac_rdmaq);
 548         tx->tx_qtime = jiffies;
 549         spin_unlock_irqrestore(&conn->rac_lock, flags);
 550 }
 551
 552 int
 553 kranal_consume_rxmsg (kra_conn_t *conn, void *buffer, int nob)
 554 {
 555         __u32      nob_received = nob;
 556         RAP_RETURN rrc;
 557
 558         LASSERT (conn->rac_rxmsg != NULL);
 559
 560         rrc = RapkFmaCopyOut(conn->rac_rihandle, buffer,
 561                              &nob_received, sizeof(kra_msg_t));
 562         LASSERT (rrc == RAP_SUCCESS);
 563
 564         conn->rac_rxmsg = NULL;
 565
 566         if (nob_received != nob) {
 567                 CWARN("Expected %d immediate bytes but got %d\n",
 568                       nob, nob_received);
 569                 return -EPROTO;
 570         }
 571
 572         return 0;
 573 }
 574
 575 ptl_err_t
 576 kranal_do_send (lib_nal_t    *nal,
 577                 void         *private,
 578                 lib_msg_t    *libmsg,
 579                 ptl_hdr_t    *hdr,
 580                 int           type,
 581                 ptl_nid_t     nid,
 582                 ptl_pid_t     pid,
 583                 unsigned int  niov,
 584                 struct iovec *iov,
 585                 ptl_kiov_t   *kiov,
 586                 size_t        offset,
 587                 size_t        nob)
 588 {
 589         kra_conn_t *conn;
 590         kra_tx_t   *tx;
 591         int         rc;
 592
 593         /* NB 'private' is different depending on what we're sending.... */
 594
 595         CDEBUG(D_NET, "sending "LPSZ" bytes in %d frags to nid:"LPX64
 596                " pid %d\n", nob, niov, nid , pid);
 597
 598         LASSERT (nob == 0 || niov > 0);
 599         LASSERT (niov <= PTL_MD_MAX_IOV);
 600
 601         LASSERT (!in_interrupt());
 602         /* payload is either all vaddrs or all pages */
 603         LASSERT (!(kiov != NULL && iov != NULL));
 604
 605         switch(type) {
 606         default:
 607                 LBUG();
 608
 609         case PTL_MSG_REPLY: {
 610                 /* reply's 'private' is the conn that received the GET_REQ */
 611                 conn = private;
 612                 LASSERT (conn->rac_rxmsg != NULL);
 613
 614                 if (conn->rac_rxmsg->ram_type == RANAL_MSG_IMMEDIATE) {
 615                         if (nob > RANAL_FMA_MAX_DATA) {
 616                                 CERROR("Can't REPLY IMMEDIATE %d to "LPX64"\n",
 617                                        nob, nid);
 618                                 return PTL_FAIL;
 619                         }
 620                         break;                  /* RDMA not expected */
 621                 }
 622
 623                 /* Incoming message consistent with immediate reply? */
 624                 if (conn->rac_rxmsg->ram_type != RANAL_MSG_GET_REQ) {
 625                         CERROR("REPLY to "LPX64" bad msg type %x!!!\n",
 626                                nid, conn->rac_rxmsg->ram_type);
 627                         return PTL_FAIL;
 628                 }
 629
 630                 tx = kranal_get_idle_tx(0);
 631                 if (tx == NULL)
 632                         return PTL_FAIL;
 633
 634                 rc = kranal_setup_rdma_buffer(tx, niov, iov, kiov, offset, nob);
 635                 if (rc != 0) {
 636                         kranal_tx_done(tx, rc);
 637                         return PTL_FAIL;
 638                 }
 639
 640                 tx->tx_conn = conn;
 641                 tx->tx_libmsg[0] = libmsg;
 642
 643                 kranal_map_buffer(tx);
 644                 kranal_rdma(tx, RANAL_MSG_GET_DONE,
 645                             &conn->rac_rxmsg->ram_u.get.ragm_desc, nob,
 646                             conn->rac_rxmsg->ram_u.get.ragm_cookie);
 647                 return PTL_OK;
 648         }
 649
 650         case PTL_MSG_GET:
 651                 LASSERT (niov == 0);
 652                 LASSERT (nob == 0);
 653                 /* We have to consider the eventual sink buffer rather than any
 654                  * payload passed here (there isn't any, and strictly, looking
 655                  * inside libmsg is a layering violation).  We send a simple
 656                  * IMMEDIATE GET if the sink buffer is mapped already and small
 657                  * enough for FMA */
 658
 659                 if ((libmsg->md->options & PTL_MD_KIOV) == 0 &&
 660                     libmsg->md->length <= RANAL_FMA_MAX_DATA &&
 661                     libmsg->md->length <= kranal_tunables.kra_max_immediate)
 662                         break;
 663
 664                 tx = kranal_new_tx_msg(!in_interrupt(), RANAL_MSG_GET_REQ);
 665                 if (tx == NULL)
 666                         return PTL_NO_SPACE;
 667
 668                 if ((libmsg->md->options & PTL_MD_KIOV) == 0)
 669                         rc = kranal_setup_virt_buffer(tx, libmsg->md->md_niov,
 670                                                       libmsg->md->md_iov.iov,
 671                                                       0, libmsg->md->length);
 672                 else
 673                         rc = kranal_setup_phys_buffer(tx, libmsg->md->md_niov,
 674                                                       libmsg->md->md_iov.kiov,
 675                                                       0, libmsg->md->length);
 676                 if (rc != 0) {
 677                         kranal_tx_done(tx, rc);
 678                         return PTL_FAIL;
 679                 }
 680
 681                 tx->tx_libmsg[1] = lib_create_reply_msg(&kranal_lib, nid, libmsg);
 682                 if (tx->tx_libmsg[1] == NULL) {
 683                         CERROR("Can't create reply for GET to "LPX64"\n", nid);
 684                         kranal_tx_done(tx, rc);
 685                         return PTL_FAIL;
 686                 }
 687
 688                 tx->tx_libmsg[0] = libmsg;
 689                 tx->tx_msg.ram_u.get.ragm_hdr = *hdr;
 690                 /* rest of tx_msg is setup just before it is sent */
 691                 kranal_launch_tx(tx, nid);
 692                 return PTL_OK;
 693
 694         case PTL_MSG_ACK:
 695                 LASSERT (nob == 0);
 696                 break;
 697
 698         case PTL_MSG_PUT:
 699                 if (kiov == NULL &&             /* not paged */
 700                     nob <= RANAL_MAX_IMMEDIATE && /* small enough */
 701                     nob <= kranal_tunables.kra_max_immediate)
 702                         break;                  /* send IMMEDIATE */
 703
 704                 tx = kranal_new_tx_msg(!in_interrupt(), RANAL_MSG_PUT_REQ);
 705                 if (tx == NULL)
 706                         return PTL_NO_SPACE;
 707
 708                 rc = kranal_setup_rdma_buffer(tx, niov, iov, kiov, offset, nob);
 709                 if (rc != 0) {
 710                         kranal_tx_done(tx, rc);
 711                         return PTL_FAIL;
 712                 }
 713
 714                 tx->tx_libmsg[0] = libmsg;
 715                 tx->tx_msg.ram_u.putreq.raprm_hdr = *hdr;
 716                 /* rest of tx_msg is setup just before it is sent */
 717                 kranal_launch_tx(tx, nid);
 718                 return PTL_OK;
 719         }
 720
 721         LASSERT (kiov == NULL);
 722         LASSERT (nob <= RANAL_MAX_IMMEDIATE);
 723
 724         tx = kranal_new_tx_msg(!(type == PTL_MSG_ACK ||
 725                                  type == PTL_MSG_REPLY ||
 726                                  in_interrupt()),
 727                                RANAL_MSG_IMMEDIATE);
 728         if (tx == NULL)
 729                 return PTL_NO_SPACE;
 730
 731         rc = kranal_setup_immediate_buffer(tx, niov, iov, offset, nob);
 732         if (rc != 0) {
 733                 kranal_tx_done(tx, rc);
 734                 return PTL_FAIL;
 735         }
 736
 737         tx->tx_msg.ram_u.immediate.raim_hdr = *hdr;
 738         tx->tx_libmsg[0] = libmsg;
 739         kranal_launch_tx(tx, nid);
 740         return PTL_OK;
 741 }
 742
 743 ptl_err_t
 744 kranal_send (lib_nal_t *nal, void *private, lib_msg_t *cookie,
 745              ptl_hdr_t *hdr, int type, ptl_nid_t nid, ptl_pid_t pid,
 746              unsigned int niov, struct iovec *iov,
 747              size_t offset, size_t len)
 748 {
 749         return kranal_do_send(nal, private, cookie,
 750                               hdr, type, nid, pid,
 751                               niov, iov, NULL,
 752                               offset, len);
 753 }
 754
 755 ptl_err_t
 756 kranal_send_pages (lib_nal_t *nal, void *private, lib_msg_t *cookie,
 757                    ptl_hdr_t *hdr, int type, ptl_nid_t nid, ptl_pid_t pid,
 758                    unsigned int niov, ptl_kiov_t *kiov,
 759                    size_t offset, size_t len)
 760 {
 761         return kranal_do_send(nal, private, cookie,
 762                               hdr, type, nid, pid,
 763                               niov, NULL, kiov,
 764                               offset, len);
 765 }
 766
 767 ptl_err_t
 768 kranal_recvmsg (lib_nal_t *nal, void *private, lib_msg_t *libmsg,
 769                 unsigned int niov, struct iovec *iov, ptl_kiov_t *kiov,
 770                 size_t offset, size_t mlen, size_t rlen)
 771 {
 772         kra_conn_t  *conn = private;
 773         kra_msg_t   *rxmsg = conn->rac_rxmsg;
 774         kra_tx_t    *tx;
 775         void        *buffer;
 776         int          rc;
 777
 778         LASSERT (mlen <= rlen);
 779         LASSERT (!in_interrupt());
 780         /* Either all pages or all vaddrs */
 781         LASSERT (!(kiov != NULL && iov != NULL));
 782
 783         switch(rxmsg->ram_type) {
 784         default:
 785                 LBUG();
 786                 return PTL_FAIL;
 787
 788         case RANAL_MSG_IMMEDIATE:
 789                 if (mlen == 0) {
 790                         buffer = NULL;
 791                 } else if (kiov != NULL) {
 792                         CERROR("Can't recv immediate into paged buffer\n");
 793                         return PTL_FAIL;
 794                 } else {
 795                         LASSERT (niov > 0);
 796                         while (offset >= iov->iov_len) {
 797                                 offset -= iov->iov_len;
 798                                 iov++;
 799                                 niov--;
 800                                 LASSERT (niov > 0);
 801                         }
 802                         if (mlen > iov->iov_len - offset) {
 803                                 CERROR("Can't handle immediate frags\n");
 804                                 return PTL_FAIL;
 805                         }
 806                         buffer = ((char *)iov->iov_base) + offset;
 807                 }
 808                 rc = kranal_consume_rxmsg(conn, buffer, mlen);
 809                 lib_finalize(nal, NULL, libmsg, (rc == 0) ? PTL_OK : PTL_FAIL);
 810                 return PTL_OK;
 811
 812         case RANAL_MSG_GET_REQ:
 813                 /* If the GET matched, we've already handled it in
 814                  * kranal_do_send which is called to send the REPLY.  We're
 815                  * only called here to complete the GET receive (if we needed
 816                  * it which we don't, but I digress...) */
 817                 LASSERT (libmsg == NULL);
 818                 lib_finalize(nal, NULL, libmsg, PTL_OK);
 819                 return PTL_OK;
 820
 821         case RANAL_MSG_PUT_REQ:
 822                 if (libmsg == NULL) {           /* PUT didn't match... */
 823                         lib_finalize(nal, NULL, libmsg, PTL_OK);
 824                         return PTL_OK;
 825                 }
 826
 827                 tx = kranal_new_tx_msg(0, RANAL_MSG_PUT_ACK);
 828                 if (tx == NULL)
 829                         return PTL_NO_SPACE;
 830
 831                 rc = kranal_setup_rdma_buffer(tx, niov, iov, kiov, offset, mlen);
 832                 if (rc != 0) {
 833                         kranal_tx_done(tx, rc);
 834                         return PTL_FAIL;
 835                 }
 836
 837                 tx->tx_conn = conn;
 838                 kranal_map_buffer(tx);
 839
 840                 tx->tx_msg.ram_u.putack.rapam_src_cookie =
 841                         conn->rac_rxmsg->ram_u.putreq.raprm_cookie;
 842                 tx->tx_msg.ram_u.putack.rapam_dst_cookie = tx->tx_cookie;
 843                 tx->tx_msg.ram_u.putack.rapam_desc.rard_key = tx->tx_map_key;
 844                 tx->tx_msg.ram_u.putack.rapam_desc.rard_addr.AddressBits =
 845                         (__u64)((unsigned long)tx->tx_buffer);
 846                 tx->tx_msg.ram_u.putack.rapam_desc.rard_nob = mlen;
 847
 848                 tx->tx_libmsg[0] = libmsg; /* finalize this on RDMA_DONE */
 849
 850                 kranal_post_fma(conn, tx);
 851
 852                 /* flag matched by consuming rx message */
 853                 kranal_consume_rxmsg(conn, NULL, 0);
 854                 return PTL_OK;
 855         }
 856 }
 857
 858 ptl_err_t
 859 kranal_recv (lib_nal_t *nal, void *private, lib_msg_t *msg,
 860              unsigned int niov, struct iovec *iov,
 861              size_t offset, size_t mlen, size_t rlen)
 862 {
 863         return kranal_recvmsg(nal, private, msg, niov, iov, NULL,
 864                               offset, mlen, rlen);
 865 }
 866
 867 ptl_err_t
 868 kranal_recv_pages (lib_nal_t *nal, void *private, lib_msg_t *msg,
 869                    unsigned int niov, ptl_kiov_t *kiov,
 870                    size_t offset, size_t mlen, size_t rlen)
 871 {
 872         return kranal_recvmsg(nal, private, msg, niov, NULL, kiov,
 873                               offset, mlen, rlen);
 874 }
 875
 876 int
 877 kranal_thread_start (int(*fn)(void *arg), void *arg)
 878 {
 879         long    pid = kernel_thread(fn, arg, 0);
 880
 881         if (pid < 0)
 882                 return(int)pid;
 883
 884         atomic_inc(&kranal_data.kra_nthreads);
 885         return 0;
 886 }
 887
 888 void
 889 kranal_thread_fini (void)
 890 {
 891         atomic_dec(&kranal_data.kra_nthreads);
 892 }
 893
 894 int
 895 kranal_check_conn_timeouts (kra_conn_t *conn)
 896 {
 897         kra_tx_t          *tx;
 898         struct list_head  *ttmp;
 899         unsigned long      flags;
 900         long               timeout;
 901         unsigned long      now = jiffies;
 902
 903         LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED ||
 904                  conn->rac_state == RANAL_CONN_CLOSING);
 905
 906         if (!conn->rac_close_sent &&
 907             time_after_eq(now, conn->rac_last_tx + conn->rac_keepalive * HZ)) {
 908                 /* not sent in a while; schedule conn so scheduler sends a keepalive */
 909                 kranal_schedule_conn(conn);
 910         }
 911
 912         timeout = conn->rac_timeout * HZ;
 913
 914         if (!conn->rac_close_recvd &&
 915             time_after_eq(now, conn->rac_last_rx + timeout)) {
 916                 CERROR("Nothing received from "LPX64" within %lu seconds\n",
 917                        conn->rac_peer->rap_nid, (now - conn->rac_last_rx)/HZ);
 918                 return -ETIMEDOUT;
 919         }
 920
 921         if (conn->rac_state != RANAL_CONN_ESTABLISHED)
 922                 return 0;
 923
 924         /* Check the conn's queues are moving.  These are "belt+braces" checks,
 925          * in case of hardware/software errors that make this conn seem
 926          * responsive even though it isn't progressing its message queues. */
 927
 928         spin_lock_irqsave(&conn->rac_lock, flags);
 929
 930         list_for_each (ttmp, &conn->rac_fmaq) {
 931                 tx = list_entry(ttmp, kra_tx_t, tx_list);
 932
 933                 if (time_after_eq(now, tx->tx_qtime + timeout)) {
 934                         spin_unlock_irqrestore(&conn->rac_lock, flags);
 935                         CERROR("tx on fmaq for "LPX64" blocked %lu seconds\n",
 936                                conn->rac_peer->rap_nid, (now - tx->tx_qtime)/HZ);
 937                         return -ETIMEDOUT;
 938                 }
 939         }
 940
 941         list_for_each (ttmp, &conn->rac_rdmaq) {
 942                 tx = list_entry(ttmp, kra_tx_t, tx_list);
 943
 944                 if (time_after_eq(now, tx->tx_qtime + timeout)) {
 945                         spin_unlock_irqrestore(&conn->rac_lock, flags);
 946                         CERROR("tx on rdmaq for "LPX64" blocked %lu seconds\n",
 947                                conn->rac_peer->rap_nid, (now - tx->tx_qtime)/HZ);
 948                         return -ETIMEDOUT;
 949                 }
 950         }
 951
 952         list_for_each (ttmp, &conn->rac_replyq) {
 953                 tx = list_entry(ttmp, kra_tx_t, tx_list);
 954
 955                 if (time_after_eq(now, tx->tx_qtime + timeout)) {
 956                         spin_unlock_irqrestore(&conn->rac_lock, flags);
 957                         CERROR("tx on replyq for "LPX64" blocked %lu seconds\n",
 958                                conn->rac_peer->rap_nid, (now - tx->tx_qtime)/HZ);
 959                         return -ETIMEDOUT;
 960                 }
 961         }
 962
 963         spin_unlock_irqrestore(&conn->rac_lock, flags);
 964         return 0;
 965 }
 966
 967 void
 968 kranal_reaper_check (int idx, unsigned long *min_timeoutp)
 969 {
 970         struct list_head  *conns = &kranal_data.kra_conns[idx];
 971         struct list_head  *ctmp;
 972         kra_conn_t        *conn;
 973         unsigned long      flags;
 974         int                rc;
 975
 976  again:
 977         /* NB. We expect to check all the conns and not find any problems, so
 978          * we just use a shared lock while we take a look... */
 979         read_lock(&kranal_data.kra_global_lock);
 980
 981         list_for_each (ctmp, conns) {
 982                 conn = list_entry(ctmp, kra_conn_t, rac_hashlist);
 983
 984                 if (conn->rac_timeout < *min_timeoutp )
 985                         *min_timeoutp = conn->rac_timeout;
 986                 if (conn->rac_keepalive < *min_timeoutp )
 987                         *min_timeoutp = conn->rac_keepalive;
 988
 989                 rc = kranal_check_conn_timeouts(conn);
 990                 if (rc == 0)
 991                         continue;
 992
 993                 kranal_conn_addref(conn);
 994                 read_unlock(&kranal_data.kra_global_lock);
 995
 996                 CERROR("Conn to "LPX64", cqid %d timed out\n",
 997                        conn->rac_peer->rap_nid, conn->rac_cqid);
 998
 999                 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1000
1001                 switch (conn->rac_state) {
1002                 default:
1003                         LBUG();
1004
1005                 case RANAL_CONN_ESTABLISHED:
1006                         kranal_close_conn_locked(conn, -ETIMEDOUT);
1007                         break;
1008
1009                 case RANAL_CONN_CLOSING:
1010                         kranal_terminate_conn_locked(conn);
1011                         break;
1012                 }
1013
1014                 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1015
1016                 kranal_conn_decref(conn);
1017
1018                 /* start again now I've dropped the lock */
1019                 goto again;
1020         }
1021
1022         read_unlock(&kranal_data.kra_global_lock);
1023 }
1024
1025 int
1026 kranal_connd (void *arg)
1027 {
1028         char               name[16];
1029         wait_queue_t       wait;
1030         unsigned long      flags;
1031         kra_peer_t        *peer;
1032         kra_acceptsock_t  *ras;
1033         int                did_something;
1034
1035         snprintf(name, sizeof(name), "kranal_connd_%02ld", (long)arg);
1036         kportal_daemonize(name);
1037         kportal_blockallsigs();
1038
1039         init_waitqueue_entry(&wait, current);
1040
1041         spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1042
1043         while (!kranal_data.kra_shutdown) {
1044                 did_something = 0;
1045
1046                 if (!list_empty(&kranal_data.kra_connd_acceptq)) {
1047                         ras = list_entry(kranal_data.kra_connd_acceptq.next,
1048                                          kra_acceptsock_t, ras_list);
1049                         list_del(&ras->ras_list);
1050                         spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1051
1052                         kranal_conn_handshake(ras->ras_sock, NULL);
1053                         sock_release(ras->ras_sock);
1054                         PORTAL_FREE(ras, sizeof(*ras));
1055
1056                         spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1057                         did_something = 1;
1058                 }
1059
1060                 if (!list_empty(&kranal_data.kra_connd_peers)) {
1061                         peer = list_entry(kranal_data.kra_connd_peers.next,
1062                                           kra_peer_t, rap_connd_list);
1063
1064                         list_del_init(&peer->rap_connd_list);
1065                         spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1066
1067                         kranal_connect(peer);
1068                         kranal_peer_decref(peer);
1069
1070                         spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1071                         did_something = 1;
1072                 }
1073
1074                 if (did_something)
1075                         continue;
1076
1077                 set_current_state(TASK_INTERRUPTIBLE);
1078                 add_wait_queue(&kranal_data.kra_connd_waitq, &wait);
1079
1080                 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1081
1082                 schedule ();
1083
1084                 set_current_state(TASK_RUNNING);
1085                 remove_wait_queue(&kranal_data.kra_connd_waitq, &wait);
1086
1087                 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1088         }
1089
1090         spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1091
1092         kranal_thread_fini();
1093         return 0;
1094 }
1095
1096 void
1097 kranal_update_reaper_timeout(long timeout)
1098 {
1099         unsigned long   flags;
1100
1101         LASSERT (timeout > 0);
1102
1103         spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1104
1105         if (timeout < kranal_data.kra_new_min_timeout)
1106                 kranal_data.kra_new_min_timeout = timeout;
1107
1108         spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1109 }
1110
1111 int
1112 kranal_reaper (void *arg)
1113 {
1114         wait_queue_t       wait;
1115         unsigned long      flags;
1116         long               timeout;
1117         int                i;
1118         int                conn_entries = kranal_data.kra_conn_hash_size;
1119         int                conn_index = 0;
1120         int                base_index = conn_entries - 1;
1121         unsigned long      next_check_time = jiffies;
1122         long               next_min_timeout = MAX_SCHEDULE_TIMEOUT;
1123         long               current_min_timeout = 1;
1124
1125         kportal_daemonize("kranal_reaper");
1126         kportal_blockallsigs();
1127
1128         init_waitqueue_entry(&wait, current);
1129
1130         spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1131
1132         while (!kranal_data.kra_shutdown) {
1133
1134                 /* careful with the jiffy wrap... */
1135                 timeout = (long)(next_check_time - jiffies);
1136                 if (timeout <= 0) {
1137
1138                         /* I wake up every 'p' seconds to check for
1139                          * timeouts on some more peers.  I try to check
1140                          * every connection 'n' times within the global
1141                          * minimum of all keepalive and timeout intervals,
1142                          * to ensure I attend to every connection within
1143                          * (n+1)/n times its timeout intervals. */
1144
1145                         const int     p = 1;
1146                         const int     n = 3;
1147                         unsigned long min_timeout;
1148                         int           chunk;
1149
1150                         if (kranal_data.kra_new_min_timeout != MAX_SCHEDULE_TIMEOUT) {
1151                                 /* new min timeout set: restart min timeout scan */
1152                                 next_min_timeout = MAX_SCHEDULE_TIMEOUT;
1153                                 base_index = conn_index - 1;
1154                                 if (base_index < 0)
1155                                         base_index = conn_entries - 1;
1156
1157                                 if (kranal_data.kra_new_min_timeout < current_min_timeout) {
1158                                         current_min_timeout = kranal_data.kra_new_min_timeout;
1159                                         CWARN("Set new min timeout %ld\n",
1160                                               current_min_timeout);
1161                                 }
1162
1163                                 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1164                         }
1165                         min_timeout = current_min_timeout;
1166
1167                         spin_unlock_irqrestore(&kranal_data.kra_reaper_lock,
1168                                                flags);
1169
1170                         LASSERT (min_timeout > 0);
1171
1172                         /* Compute how many table entries to check now so I
1173                          * get round the whole table fast enough (NB I do
1174                          * this at fixed intervals of 'p' seconds) */
1175                         chunk = conn_entries;
1176                         if (min_timeout > n * p)
1177                                 chunk = (chunk * n * p) / min_timeout;
1178                         if (chunk == 0)
1179                                 chunk = 1;
1180
1181                         for (i = 0; i < chunk; i++) {
1182                                 kranal_reaper_check(conn_index,
1183                                                     &next_min_timeout);
1184                                 conn_index = (conn_index + 1) % conn_entries;
1185                         }
1186
1187                         next_check_time += p * HZ;
1188
1189                         spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1190
1191                         if (((conn_index - chunk <= base_index &&
1192                               base_index < conn_index) ||
1193                              (conn_index - conn_entries - chunk <= base_index &&
1194                               base_index < conn_index - conn_entries))) {
1195
1196                                 /* Scanned all conns: set current_min_timeout... */
1197                                 if (current_min_timeout != next_min_timeout) {
1198                                         current_min_timeout = next_min_timeout;
1199                                         CWARN("Set new min timeout %ld\n",
1200                                               current_min_timeout);
1201                                 }
1202
1203                                 /* ...and restart min timeout scan */
1204                                 next_min_timeout = MAX_SCHEDULE_TIMEOUT;
1205                                 base_index = conn_index - 1;
1206                                 if (base_index < 0)
1207                                         base_index = conn_entries - 1;
1208                         }
1209                 }
1210
1211                 set_current_state(TASK_INTERRUPTIBLE);
1212                 add_wait_queue(&kranal_data.kra_reaper_waitq, &wait);
1213
1214                 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1215
1216                 schedule_timeout(timeout);
1217
1218                 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1219
1220                 set_current_state(TASK_RUNNING);
1221                 remove_wait_queue(&kranal_data.kra_reaper_waitq, &wait);
1222         }
1223
1224         kranal_thread_fini();
1225         return 0;
1226 }
1227
1228 void
1229 kranal_check_rdma_cq (kra_device_t *dev)
1230 {
1231         kra_conn_t          *conn;
1232         kra_tx_t            *tx;
1233         RAP_RETURN           rrc;
1234         unsigned long        flags;
1235         RAP_RDMA_DESCRIPTOR *desc;
1236         __u32                cqid;
1237         __u32                event_type;
1238
1239         for (;;) {
1240                 rrc = RapkCQDone(dev->rad_rdma_cqh, &cqid, &event_type);
1241                 if (rrc == RAP_NOT_DONE)
1242                         return;
1243
1244                 LASSERT (rrc == RAP_SUCCESS);
1245                 LASSERT ((event_type & RAPK_CQ_EVENT_OVERRUN) == 0);
1246
1247                 read_lock(&kranal_data.kra_global_lock);
1248
1249                 conn = kranal_cqid2conn_locked(cqid);
1250                 if (conn == NULL) {
1251                         /* Conn was destroyed? */
1252                         CWARN("RDMA CQID lookup %d failed\n", cqid);
1253                         read_unlock(&kranal_data.kra_global_lock);
1254                         continue;
1255                 }
1256
1257                 rrc = RapkRdmaDone(conn->rac_rihandle, &desc);
1258                 LASSERT (rrc == RAP_SUCCESS);
1259
1260                 spin_lock_irqsave(&conn->rac_lock, flags);
1261
1262                 LASSERT (!list_empty(&conn->rac_rdmaq));
1263                 tx = list_entry(conn->rac_rdmaq.next, kra_tx_t, tx_list);
1264                 list_del(&tx->tx_list);
1265
1266                 LASSERT(desc->AppPtr == (void *)tx);
1267                 LASSERT(tx->tx_msg.ram_type == RANAL_MSG_PUT_DONE ||
1268                         tx->tx_msg.ram_type == RANAL_MSG_GET_DONE);
1269
1270                 list_add_tail(&tx->tx_list, &conn->rac_fmaq);
1271                 tx->tx_qtime = jiffies;
1272
1273                 spin_unlock_irqrestore(&conn->rac_lock, flags);
1274
1275                 /* Get conn's fmaq processed, now I've just put something
1276                  * there */
1277                 kranal_schedule_conn(conn);
1278
1279                 read_unlock(&kranal_data.kra_global_lock);
1280         }
1281 }
1282
1283 void
1284 kranal_check_fma_cq (kra_device_t *dev)
1285 {
1286         kra_conn_t         *conn;
1287         RAP_RETURN          rrc;
1288         __u32               cqid;
1289         __u32               event_type;
1290         struct list_head   *conns;
1291         struct list_head   *tmp;
1292         int                 i;
1293
1294         for (;;) {
1295                 rrc = RapkCQDone(dev->rad_fma_cqh, &cqid, &event_type);
1296                 if (rrc != RAP_NOT_DONE)
1297                         return;
1298
1299                 LASSERT (rrc == RAP_SUCCESS);
1300
1301                 if ((event_type & RAPK_CQ_EVENT_OVERRUN) == 0) {
1302
1303                         read_lock(&kranal_data.kra_global_lock);
1304
1305                         conn = kranal_cqid2conn_locked(cqid);
1306                         if (conn == NULL)
1307                                 CWARN("FMA CQID lookup %d failed\n", cqid);
1308                         else
1309                                 kranal_schedule_conn(conn);
1310
1311                         read_unlock(&kranal_data.kra_global_lock);
1312                         continue;
1313                 }
1314
1315                 /* FMA CQ has overflowed: check ALL conns */
1316                 CWARN("Scheduling ALL conns on device %d\n", dev->rad_id);
1317
1318                 for (i = 0; i < kranal_data.kra_conn_hash_size; i++) {
1319
1320                         read_lock(&kranal_data.kra_global_lock);
1321
1322                         conns = &kranal_data.kra_conns[i];
1323
1324                         list_for_each (tmp, conns) {
1325                                 conn = list_entry(tmp, kra_conn_t,
1326                                                   rac_hashlist);
1327
1328                                 if (conn->rac_device == dev)
1329                                         kranal_schedule_conn(conn);
1330                         }
1331
1332                         /* don't block write lockers for too long... */
1333                         read_unlock(&kranal_data.kra_global_lock);
1334                 }
1335         }
1336 }
1337
1338 int
1339 kranal_sendmsg(kra_conn_t *conn, kra_msg_t *msg,
1340                void *immediate, int immediatenob)
1341 {
1342         int        sync = (msg->ram_type & RANAL_MSG_FENCE) != 0;
1343         RAP_RETURN rrc;
1344
1345         LASSERT (sizeof(*msg) <= RANAL_FMA_MAX_PREFIX);
1346         LASSERT ((msg->ram_type == RANAL_MSG_IMMEDIATE) ?
1347                  immediatenob <= RANAL_FMA_MAX_DATA :
1348                  immediatenob == 0);
1349
1350         msg->ram_connstamp = conn->rac_my_connstamp;
1351         msg->ram_seq = conn->rac_tx_seq;
1352
1353         if (sync)
1354                 rrc = RapkFmaSyncSend(conn->rac_device->rad_handle,
1355                                       immediate, immediatenob,
1356                                       msg, sizeof(*msg));
1357         else
1358                 rrc = RapkFmaSend(conn->rac_device->rad_handle,
1359                                   immediate, immediatenob,
1360                                   msg, sizeof(*msg));
1361
1362         switch (rrc) {
1363         default:
1364                 LBUG();
1365
1366         case RAP_SUCCESS:
1367                 conn->rac_last_tx = jiffies;
1368                 conn->rac_tx_seq++;
1369                 return 0;
1370
1371         case RAP_NOT_DONE:
1372                 return -EAGAIN;
1373         }
1374 }
1375
1376 void
1377 kranal_process_fmaq (kra_conn_t *conn)
1378 {
1379         unsigned long flags;
1380         int           more_to_do;
1381         kra_tx_t     *tx;
1382         int           rc;
1383         int           expect_reply;
1384
1385         /* NB 1. kranal_sendmsg() may fail if I'm out of credits right now.
1386          *       However I will be rescheduled some by an FMA completion event
1387          *       when I eventually get some.
1388          * NB 2. Sampling rac_state here, races with setting it elsewhere
1389          *       kranal_close_conn_locked.  But it doesn't matter if I try to
1390          *       send a "real" message just as I start closing because I'll get
1391          *       scheduled to send the close anyway. */
1392
1393         if (conn->rac_state != RANAL_CONN_ESTABLISHED) {
1394                 if (!list_empty(&conn->rac_rdmaq)) {
1395                         /* RDMAs in progress */
1396                         LASSERT (!conn->rac_close_sent);
1397
1398                         if (time_after_eq(jiffies,
1399                                           conn->rac_last_tx +
1400                                           conn->rac_keepalive)) {
1401                                 kranal_init_msg(&conn->rac_msg, RANAL_MSG_NOOP);
1402                                 kranal_sendmsg(conn, &conn->rac_msg, NULL, 0);
1403                         }
1404                         return;
1405                 }
1406
1407                 if (conn->rac_close_sent)
1408                         return;
1409
1410                 kranal_init_msg(&conn->rac_msg, RANAL_MSG_CLOSE);
1411                 rc = kranal_sendmsg(conn, &conn->rac_msg, NULL, 0);
1412                 if (rc != 0)
1413                         return;
1414
1415                 conn->rac_close_sent = 1;
1416                 if (!conn->rac_close_recvd)
1417                         return;
1418
1419                 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1420
1421                 if (conn->rac_state == RANAL_CONN_CLOSING)
1422                         kranal_terminate_conn_locked(conn);
1423
1424                 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1425                 return;
1426         }
1427
1428         spin_lock_irqsave(&conn->rac_lock, flags);
1429
1430         if (list_empty(&conn->rac_fmaq)) {
1431
1432                 spin_unlock_irqrestore(&conn->rac_lock, flags);
1433
1434                 if (time_after_eq(jiffies,
1435                                   conn->rac_last_tx + conn->rac_keepalive)) {
1436                         kranal_init_msg(&conn->rac_msg, RANAL_MSG_NOOP);
1437                         kranal_sendmsg(conn, &conn->rac_msg, NULL, 0);
1438                 }
1439                 return;
1440         }
1441
1442         tx = list_entry(conn->rac_fmaq.next, kra_tx_t, tx_list);
1443         list_del(&tx->tx_list);
1444         more_to_do = !list_empty(&conn->rac_fmaq);
1445
1446         spin_unlock_irqrestore(&conn->rac_lock, flags);
1447
1448         expect_reply = 0;
1449         switch (tx->tx_msg.ram_type) {
1450         default:
1451                 LBUG();
1452
1453         case RANAL_MSG_IMMEDIATE:
1454         case RANAL_MSG_PUT_NAK:
1455         case RANAL_MSG_PUT_DONE:
1456         case RANAL_MSG_GET_NAK:
1457         case RANAL_MSG_GET_DONE:
1458                 rc = kranal_sendmsg(conn, &tx->tx_msg,
1459                                     tx->tx_buffer, tx->tx_nob);
1460                 expect_reply = 0;
1461                 break;
1462
1463         case RANAL_MSG_PUT_REQ:
1464                 tx->tx_msg.ram_u.putreq.raprm_cookie = tx->tx_cookie;
1465                 rc = kranal_sendmsg(conn, &tx->tx_msg, NULL, 0);
1466                 kranal_map_buffer(tx);
1467                 expect_reply = 1;
1468                 break;
1469
1470         case RANAL_MSG_PUT_ACK:
1471                 rc = kranal_sendmsg(conn, &tx->tx_msg, NULL, 0);
1472                 expect_reply = 1;
1473                 break;
1474
1475         case RANAL_MSG_GET_REQ:
1476                 kranal_map_buffer(tx);
1477                 tx->tx_msg.ram_u.get.ragm_cookie = tx->tx_cookie;
1478                 tx->tx_msg.ram_u.get.ragm_desc.rard_key = tx->tx_map_key;
1479                 tx->tx_msg.ram_u.get.ragm_desc.rard_addr.AddressBits =
1480                         (__u64)((unsigned long)tx->tx_buffer);
1481                 tx->tx_msg.ram_u.get.ragm_desc.rard_nob = tx->tx_nob;
1482                 rc = kranal_sendmsg(conn, &tx->tx_msg, NULL, 0);
1483                 expect_reply = 1;
1484                 break;
1485         }
1486
1487         if (rc == -EAGAIN) {
1488                 /* I need credits to send this.  Replace tx at the head of the
1489                  * fmaq and I'll get rescheduled when credits appear */
1490                 spin_lock_irqsave(&conn->rac_lock, flags);
1491                 list_add(&tx->tx_list, &conn->rac_fmaq);
1492                 spin_unlock_irqrestore(&conn->rac_lock, flags);
1493                 return;
1494         }
1495
1496         LASSERT (rc == 0);
1497
1498         if (!expect_reply) {
1499                 kranal_tx_done(tx, 0);
1500         } else {
1501                 spin_lock_irqsave(&conn->rac_lock, flags);
1502                 list_add_tail(&tx->tx_list, &conn->rac_replyq);
1503                 tx->tx_qtime = jiffies;
1504                 spin_unlock_irqrestore(&conn->rac_lock, flags);
1505         }
1506
1507         if (more_to_do)
1508                 kranal_schedule_conn(conn);
1509 }
1510
1511 static inline void
1512 kranal_swab_rdma_desc (kra_rdma_desc_t *d)
1513 {
1514         __swab64s(&d->rard_key.Key);
1515         __swab16s(&d->rard_key.Cookie);
1516         __swab16s(&d->rard_key.MdHandle);
1517         __swab32s(&d->rard_key.Flags);
1518         __swab64s(&d->rard_addr.AddressBits);
1519         __swab32s(&d->rard_nob);
1520 }
1521
1522 kra_tx_t *
1523 kranal_match_reply(kra_conn_t *conn, int type, __u64 cookie)
1524 {
1525         struct list_head *ttmp;
1526         kra_tx_t         *tx;
1527
1528         list_for_each(ttmp, &conn->rac_replyq) {
1529                 tx = list_entry(ttmp, kra_tx_t, tx_list);
1530
1531                 if (tx->tx_cookie != cookie)
1532                         continue;
1533
1534                 if (tx->tx_msg.ram_type != type) {
1535                         CWARN("Unexpected type %x (%x expected) "
1536                               "matched reply from "LPX64"\n",
1537                               tx->tx_msg.ram_type, type,
1538                               conn->rac_peer->rap_nid);
1539                         return NULL;
1540                 }
1541         }
1542
1543         CWARN("Unmatched reply from "LPX64"\n", conn->rac_peer->rap_nid);
1544         return NULL;
1545 }
1546
1547 void
1548 kranal_check_fma_rx (kra_conn_t *conn)
1549 {
1550         unsigned long flags;
1551         __u32         seq;
1552         kra_tx_t     *tx;
1553         kra_msg_t    *msg;
1554         void         *prefix;
1555         RAP_RETURN    rrc = RapkFmaGetPrefix(conn->rac_rihandle, &prefix);
1556         kra_peer_t   *peer = conn->rac_peer;
1557
1558         if (rrc == RAP_NOT_DONE)
1559                 return;
1560
1561         LASSERT (rrc == RAP_SUCCESS);
1562         conn->rac_last_rx = jiffies;
1563         seq = conn->rac_rx_seq++;
1564         msg = (kra_msg_t *)prefix;
1565
1566         if (msg->ram_magic != RANAL_MSG_MAGIC) {
1567                 if (__swab32(msg->ram_magic) != RANAL_MSG_MAGIC) {
1568                         CERROR("Unexpected magic %08x from "LPX64"\n",
1569                                msg->ram_magic, peer->rap_nid);
1570                         goto out;
1571                 }
1572
1573                 __swab32s(&msg->ram_magic);
1574                 __swab16s(&msg->ram_version);
1575                 __swab16s(&msg->ram_type);
1576                 __swab64s(&msg->ram_srcnid);
1577                 __swab64s(&msg->ram_connstamp);
1578                 __swab32s(&msg->ram_seq);
1579
1580                 /* NB message type checked below; NOT here... */
1581                 switch (msg->ram_type) {
1582                 case RANAL_MSG_PUT_ACK:
1583                         kranal_swab_rdma_desc(&msg->ram_u.putack.rapam_desc);
1584                         break;
1585
1586                 case RANAL_MSG_GET_REQ:
1587                         kranal_swab_rdma_desc(&msg->ram_u.get.ragm_desc);
1588                         break;
1589
1590                 default:
1591                         break;
1592                 }
1593         }
1594
1595         if (msg->ram_version != RANAL_MSG_VERSION) {
1596                 CERROR("Unexpected protocol version %d from "LPX64"\n",
1597                        msg->ram_version, peer->rap_nid);
1598                 goto out;
1599         }
1600
1601         if (msg->ram_srcnid != peer->rap_nid) {
1602                 CERROR("Unexpected peer "LPX64" from "LPX64"\n",
1603                        msg->ram_srcnid, peer->rap_nid);
1604                 goto out;
1605         }
1606
1607         if (msg->ram_connstamp != conn->rac_peer_connstamp) {
1608                 CERROR("Unexpected connstamp "LPX64"("LPX64
1609                        " expected) from "LPX64"\n",
1610                        msg->ram_connstamp, conn->rac_peer_connstamp,
1611                        peer->rap_nid);
1612                 goto out;
1613         }
1614
1615         if (msg->ram_seq != seq) {
1616                 CERROR("Unexpected sequence number %d(%d expected) from "
1617                        LPX64"\n", msg->ram_seq, seq, peer->rap_nid);
1618                 goto out;
1619         }
1620
1621         if ((msg->ram_type & RANAL_MSG_FENCE) != 0) {
1622                 /* This message signals RDMA completion... */
1623                 rrc = RapkFmaSyncWait(conn->rac_rihandle);
1624                 LASSERT (rrc == RAP_SUCCESS);
1625         }
1626
1627         if (conn->rac_close_recvd) {
1628                 CERROR("Unexpected message %d after CLOSE from "LPX64"\n",
1629                        msg->ram_type, conn->rac_peer->rap_nid);
1630                 goto out;
1631         }
1632
1633         if (msg->ram_type == RANAL_MSG_CLOSE) {
1634                 conn->rac_close_recvd = 1;
1635                 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1636
1637                 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
1638                         kranal_close_conn_locked(conn, 0);
1639                 else if (conn->rac_close_sent)
1640                         kranal_terminate_conn_locked(conn);
1641
1642                 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1643                 goto out;
1644         }
1645
1646         if (conn->rac_state != RANAL_CONN_ESTABLISHED)
1647                 goto out;
1648
1649         conn->rac_rxmsg = msg;                  /* stash message for portals callbacks */
1650                                                 /* they'll NULL rac_rxmsg if they consume it */
1651         switch (msg->ram_type) {
1652         case RANAL_MSG_NOOP:
1653                 /* Nothing to do; just a keepalive */
1654                 break;
1655
1656         case RANAL_MSG_IMMEDIATE:
1657                 lib_parse(&kranal_lib, &msg->ram_u.immediate.raim_hdr, conn);
1658                 break;
1659
1660         case RANAL_MSG_PUT_REQ:
1661                 lib_parse(&kranal_lib, &msg->ram_u.putreq.raprm_hdr, conn);
1662
1663                 if (conn->rac_rxmsg == NULL)    /* lib_parse matched something */
1664                         break;
1665
1666                 tx = kranal_new_tx_msg(0, RANAL_MSG_PUT_NAK);
1667                 if (tx == NULL)
1668                         break;
1669
1670                 tx->tx_msg.ram_u.completion.racm_cookie =
1671                         msg->ram_u.putreq.raprm_cookie;
1672                 kranal_post_fma(conn, tx);
1673                 break;
1674
1675         case RANAL_MSG_PUT_NAK:
1676                 tx = kranal_match_reply(conn, RANAL_MSG_PUT_REQ,
1677                                         msg->ram_u.completion.racm_cookie);
1678                 if (tx == NULL)
1679                         break;
1680
1681                 LASSERT (tx->tx_buftype == RANAL_BUF_PHYS_MAPPED ||
1682                          tx->tx_buftype == RANAL_BUF_VIRT_MAPPED);
1683                 kranal_tx_done(tx, -ENOENT);    /* no match */
1684                 break;
1685
1686         case RANAL_MSG_PUT_ACK:
1687                 tx = kranal_match_reply(conn, RANAL_MSG_PUT_REQ,
1688                                         msg->ram_u.putack.rapam_src_cookie);
1689                 if (tx == NULL)
1690                         break;
1691
1692                 kranal_rdma(tx, RANAL_MSG_PUT_DONE,
1693                             &msg->ram_u.putack.rapam_desc,
1694                             msg->ram_u.putack.rapam_desc.rard_nob,
1695                             msg->ram_u.putack.rapam_dst_cookie);
1696                 break;
1697
1698         case RANAL_MSG_PUT_DONE:
1699                 tx = kranal_match_reply(conn, RANAL_MSG_PUT_ACK,
1700                                         msg->ram_u.completion.racm_cookie);
1701                 if (tx == NULL)
1702                         break;
1703
1704                 LASSERT (tx->tx_buftype == RANAL_BUF_PHYS_MAPPED ||
1705                          tx->tx_buftype == RANAL_BUF_VIRT_MAPPED);
1706                 kranal_tx_done(tx, 0);
1707                 break;
1708
1709         case RANAL_MSG_GET_REQ:
1710                 lib_parse(&kranal_lib, &msg->ram_u.get.ragm_hdr, conn);
1711
1712                 if (conn->rac_rxmsg == NULL)    /* lib_parse matched something */
1713                         break;
1714
1715                 tx = kranal_new_tx_msg(0, RANAL_MSG_GET_NAK);
1716                 if (tx == NULL)
1717                         break;
1718
1719                 tx->tx_msg.ram_u.completion.racm_cookie = msg->ram_u.get.ragm_cookie;
1720                 kranal_post_fma(conn, tx);
1721                 break;
1722
1723         case RANAL_MSG_GET_NAK:
1724                 tx = kranal_match_reply(conn, RANAL_MSG_GET_REQ,
1725                                         msg->ram_u.completion.racm_cookie);
1726                 if (tx == NULL)
1727                         break;
1728
1729                 LASSERT (tx->tx_buftype == RANAL_BUF_PHYS_MAPPED ||
1730                          tx->tx_buftype == RANAL_BUF_VIRT_MAPPED);
1731                 kranal_tx_done(tx, -ENOENT);    /* no match */
1732                 break;
1733
1734         case RANAL_MSG_GET_DONE:
1735                 tx = kranal_match_reply(conn, RANAL_MSG_GET_REQ,
1736                                         msg->ram_u.completion.racm_cookie);
1737                 if (tx == NULL)
1738                         break;
1739
1740                 LASSERT (tx->tx_buftype == RANAL_BUF_PHYS_MAPPED ||
1741                          tx->tx_buftype == RANAL_BUF_VIRT_MAPPED);
1742                 kranal_tx_done(tx, 0);
1743                 break;
1744         }
1745
1746  out:
1747         if (conn->rac_rxmsg != NULL)
1748                 kranal_consume_rxmsg(conn, NULL, 0);
1749
1750         /* check again later */
1751         kranal_schedule_conn(conn);
1752 }
1753
1754 void
1755 kranal_complete_closed_conn (kra_conn_t *conn)
1756 {
1757         kra_tx_t   *tx;
1758
1759         LASSERT (conn->rac_state == RANAL_CONN_CLOSED);
1760
1761         while (!list_empty(&conn->rac_fmaq)) {
1762                 tx = list_entry(conn->rac_fmaq.next, kra_tx_t, tx_list);
1763
1764                 list_del(&tx->tx_list);
1765                 kranal_tx_done(tx, -ECONNABORTED);
1766         }
1767
1768         LASSERT (list_empty(&conn->rac_rdmaq));
1769
1770         while (!list_empty(&conn->rac_replyq)) {
1771                 tx = list_entry(conn->rac_replyq.next, kra_tx_t, tx_list);
1772
1773                 list_del(&tx->tx_list);
1774                 kranal_tx_done(tx, -ECONNABORTED);
1775         }
1776 }
1777
1778 int
1779 kranal_scheduler (void *arg)
1780 {
1781         kra_device_t   *dev = (kra_device_t *)arg;
1782         wait_queue_t    wait;
1783         char            name[16];
1784         kra_conn_t     *conn;
1785         unsigned long   flags;
1786         int             busy_loops = 0;
1787
1788         snprintf(name, sizeof(name), "kranal_sd_%02d", dev->rad_idx);
1789         kportal_daemonize(name);
1790         kportal_blockallsigs();
1791
1792         dev->rad_scheduler = current;
1793         init_waitqueue_entry(&wait, current);
1794
1795         spin_lock_irqsave(&dev->rad_lock, flags);
1796
1797         while (!kranal_data.kra_shutdown) {
1798                 /* Safe: kra_shutdown only set when quiescent */
1799
1800                 if (busy_loops++ >= RANAL_RESCHED) {
1801                         spin_unlock_irqrestore(&dev->rad_lock, flags);
1802
1803                         our_cond_resched();
1804                         busy_loops = 0;
1805
1806                         spin_lock_irqsave(&dev->rad_lock, flags);
1807                 }
1808
1809                 if (dev->rad_ready) {
1810                         /* Device callback fired since I last checked it */
1811                         dev->rad_ready = 0;
1812                         spin_unlock_irqrestore(&dev->rad_lock, flags);
1813
1814                         kranal_check_rdma_cq(dev);
1815                         kranal_check_fma_cq(dev);
1816
1817                         spin_lock_irqsave(&dev->rad_lock, flags);
1818                 }
1819
1820                 if (!list_empty(&dev->rad_connq)) {
1821                         /* Connection needs attention */
1822                         conn = list_entry(dev->rad_connq.next,
1823                                           kra_conn_t, rac_schedlist);
1824                         list_del_init(&conn->rac_schedlist);
1825                         LASSERT (conn->rac_scheduled);
1826                         conn->rac_scheduled = 0;
1827                         spin_unlock_irqrestore(&dev->rad_lock, flags);
1828
1829                         kranal_check_fma_rx(conn);
1830                         kranal_process_fmaq(conn);
1831
1832                         if (conn->rac_state == RANAL_CONN_CLOSED)
1833                                 kranal_complete_closed_conn(conn);
1834
1835                         kranal_conn_decref(conn);
1836
1837                         spin_lock_irqsave(&dev->rad_lock, flags);
1838                         continue;
1839                 }
1840
1841                 add_wait_queue(&dev->rad_waitq, &wait);
1842                 set_current_state(TASK_INTERRUPTIBLE);
1843
1844                 spin_unlock_irqrestore(&dev->rad_lock, flags);
1845
1846                 busy_loops = 0;
1847                 schedule();
1848
1849                 set_current_state(TASK_RUNNING);
1850                 remove_wait_queue(&dev->rad_waitq, &wait);
1851
1852                 spin_lock_irqsave(&dev->rad_lock, flags);
1853         }
1854
1855         spin_unlock_irqrestore(&dev->rad_lock, flags);
1856
1857         dev->rad_scheduler = NULL;
1858         kranal_thread_fini();
1859         return 0;
1860 }
1861
1862
1863 lib_nal_t kranal_lib = {
1864         libnal_data:        &kranal_data,      /* NAL private data */
1865         libnal_send:         kranal_send,
1866         libnal_send_pages:   kranal_send_pages,
1867         libnal_recv:         kranal_recv,
1868         libnal_recv_pages:   kranal_recv_pages,
1869         libnal_dist:         kranal_dist
1870 };