fs/dlm/rcom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3 *******************************************************************************
   4 **
   5 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   6 **  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
   7 **
   8 **
   9 *******************************************************************************
  10 ******************************************************************************/
  11
  12 #include "dlm_internal.h"
  13 #include "lockspace.h"
  14 #include "member.h"
  15 #include "lowcomms.h"
  16 #include "midcomms.h"
  17 #include "rcom.h"
  18 #include "recover.h"
  19 #include "dir.h"
  20 #include "config.h"
  21 #include "memory.h"
  22 #include "lock.h"
  23 #include "util.h"
  24
  25 static int rcom_response(struct dlm_ls *ls)
  26 {
  27         return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
  28 }
  29
  30 static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
  31                        struct dlm_rcom **rc_ret, struct dlm_mhandle **mh_ret)
  32 {
  33         struct dlm_rcom *rc;
  34         struct dlm_mhandle *mh;
  35         char *mb;
  36         int mb_len = sizeof(struct dlm_rcom) + len;
  37
  38         mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_NOFS, &mb);
  39         if (!mh) {
  40                 log_print("create_rcom to %d type %d len %d ENOBUFS",
  41                           to_nodeid, type, len);
  42                 return -ENOBUFS;
  43         }
  44
  45         rc = (struct dlm_rcom *) mb;
  46
  47         rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
  48         rc->rc_header.h_lockspace = ls->ls_global_id;
  49         rc->rc_header.h_nodeid = dlm_our_nodeid();
  50         rc->rc_header.h_length = mb_len;
  51         rc->rc_header.h_cmd = DLM_RCOM;
  52
  53         rc->rc_type = type;
  54
  55         spin_lock(&ls->ls_recover_lock);
  56         rc->rc_seq = ls->ls_recover_seq;
  57         spin_unlock(&ls->ls_recover_lock);
  58
  59         *mh_ret = mh;
  60         *rc_ret = rc;
  61         return 0;
  62 }
  63
  64 static void send_rcom(struct dlm_ls *ls, struct dlm_mhandle *mh,
  65                       struct dlm_rcom *rc)
  66 {
  67         dlm_rcom_out(rc);
  68         dlm_lowcomms_commit_buffer(mh);
  69 }
  70
  71 static void set_rcom_status(struct dlm_ls *ls, struct rcom_status *rs,
  72                             uint32_t flags)
  73 {
  74         rs->rs_flags = cpu_to_le32(flags);
  75 }
  76
  77 /* When replying to a status request, a node also sends back its
  78    configuration values.  The requesting node then checks that the remote
  79    node is configured the same way as itself. */
  80
  81 static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
  82                             uint32_t num_slots)
  83 {
  84         rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
  85         rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
  86
  87         rf->rf_our_slot = cpu_to_le16(ls->ls_slot);
  88         rf->rf_num_slots = cpu_to_le16(num_slots);
  89         rf->rf_generation =  cpu_to_le32(ls->ls_generation);
  90 }
  91
  92 static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
  93 {
  94         struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
  95
  96         if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) {
  97                 log_error(ls, "version mismatch: %x nodeid %d: %x",
  98                           DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
  99                           rc->rc_header.h_version);
 100                 return -EPROTO;
 101         }
 102
 103         if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
 104             le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
 105                 log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
 106                           ls->ls_lvblen, ls->ls_exflags, nodeid,
 107                           le32_to_cpu(rf->rf_lvblen),
 108                           le32_to_cpu(rf->rf_lsflags));
 109                 return -EPROTO;
 110         }
 111         return 0;
 112 }
 113
 114 static void allow_sync_reply(struct dlm_ls *ls, uint64_t *new_seq)
 115 {
 116         spin_lock(&ls->ls_rcom_spin);
 117         *new_seq = ++ls->ls_rcom_seq;
 118         set_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 119         spin_unlock(&ls->ls_rcom_spin);
 120 }
 121
 122 static void disallow_sync_reply(struct dlm_ls *ls)
 123 {
 124         spin_lock(&ls->ls_rcom_spin);
 125         clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 126         clear_bit(LSFL_RCOM_READY, &ls->ls_flags);
 127         spin_unlock(&ls->ls_rcom_spin);
 128 }
 129
 130 /*
 131  * low nodeid gathers one slot value at a time from each node.
 132  * it sets need_slots=0, and saves rf_our_slot returned from each
 133  * rcom_config.
 134  *
 135  * other nodes gather all slot values at once from the low nodeid.
 136  * they set need_slots=1, and ignore the rf_our_slot returned from each
 137  * rcom_config.  they use the rf_num_slots returned from the low
 138  * node's rcom_config.
 139  */
 140
 141 int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags)
 142 {
 143         struct dlm_rcom *rc;
 144         struct dlm_mhandle *mh;
 145         int error = 0;
 146
 147         ls->ls_recover_nodeid = nodeid;
 148
 149         if (nodeid == dlm_our_nodeid()) {
 150                 rc = ls->ls_recover_buf;
 151                 rc->rc_result = dlm_recover_status(ls);
 152                 goto out;
 153         }
 154
 155 retry:
 156         error = create_rcom(ls, nodeid, DLM_RCOM_STATUS,
 157                             sizeof(struct rcom_status), &rc, &mh);
 158         if (error)
 159                 goto out;
 160
 161         set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
 162
 163         allow_sync_reply(ls, &rc->rc_id);
 164         memset(ls->ls_recover_buf, 0, LOWCOMMS_MAX_TX_BUFFER_LEN);
 165
 166         send_rcom(ls, mh, rc);
 167
 168         error = dlm_wait_function(ls, &rcom_response);
 169         disallow_sync_reply(ls);
 170         if (error == -ETIMEDOUT)
 171                 goto retry;
 172         if (error)
 173                 goto out;
 174
 175         rc = ls->ls_recover_buf;
 176
 177         if (rc->rc_result == -ESRCH) {
 178                 /* we pretend the remote lockspace exists with 0 status */
 179                 log_debug(ls, "remote node %d not ready", nodeid);
 180                 rc->rc_result = 0;
 181                 error = 0;
 182         } else {
 183                 error = check_rcom_config(ls, rc, nodeid);
 184         }
 185
 186         /* the caller looks at rc_result for the remote recovery status */
 187  out:
 188         return error;
 189 }
 190
 191 static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 192 {
 193         struct dlm_rcom *rc;
 194         struct dlm_mhandle *mh;
 195         struct rcom_status *rs;
 196         uint32_t status;
 197         int nodeid = rc_in->rc_header.h_nodeid;
 198         int len = sizeof(struct rcom_config);
 199         int num_slots = 0;
 200         int error;
 201
 202         if (!dlm_slots_version(&rc_in->rc_header)) {
 203                 status = dlm_recover_status(ls);
 204                 goto do_create;
 205         }
 206
 207         rs = (struct rcom_status *)rc_in->rc_buf;
 208
 209         if (!(le32_to_cpu(rs->rs_flags) & DLM_RSF_NEED_SLOTS)) {
 210                 status = dlm_recover_status(ls);
 211                 goto do_create;
 212         }
 213
 214         spin_lock(&ls->ls_recover_lock);
 215         status = ls->ls_recover_status;
 216         num_slots = ls->ls_num_slots;
 217         spin_unlock(&ls->ls_recover_lock);
 218         len += num_slots * sizeof(struct rcom_slot);
 219
 220  do_create:
 221         error = create_rcom(ls, nodeid, DLM_RCOM_STATUS_REPLY,
 222                             len, &rc, &mh);
 223         if (error)
 224                 return;
 225
 226         rc->rc_id = rc_in->rc_id;
 227         rc->rc_seq_reply = rc_in->rc_seq;
 228         rc->rc_result = status;
 229
 230         set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, num_slots);
 231
 232         if (!num_slots)
 233                 goto do_send;
 234
 235         spin_lock(&ls->ls_recover_lock);
 236         if (ls->ls_num_slots != num_slots) {
 237                 spin_unlock(&ls->ls_recover_lock);
 238                 log_debug(ls, "receive_rcom_status num_slots %d to %d",
 239                           num_slots, ls->ls_num_slots);
 240                 rc->rc_result = 0;
 241                 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, 0);
 242                 goto do_send;
 243         }
 244
 245         dlm_slots_copy_out(ls, rc);
 246         spin_unlock(&ls->ls_recover_lock);
 247
 248  do_send:
 249         send_rcom(ls, mh, rc);
 250 }
 251
 252 static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 253 {
 254         spin_lock(&ls->ls_rcom_spin);
 255         if (!test_bit(LSFL_RCOM_WAIT, &ls->ls_flags) ||
 256             rc_in->rc_id != ls->ls_rcom_seq) {
 257                 log_debug(ls, "reject reply %d from %d seq %llx expect %llx",
 258                           rc_in->rc_type, rc_in->rc_header.h_nodeid,
 259                           (unsigned long long)rc_in->rc_id,
 260                           (unsigned long long)ls->ls_rcom_seq);
 261                 goto out;
 262         }
 263         memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length);
 264         set_bit(LSFL_RCOM_READY, &ls->ls_flags);
 265         clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 266         wake_up(&ls->ls_wait_general);
 267  out:
 268         spin_unlock(&ls->ls_rcom_spin);
 269 }
 270
 271 int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
 272 {
 273         struct dlm_rcom *rc;
 274         struct dlm_mhandle *mh;
 275         int error = 0;
 276
 277         ls->ls_recover_nodeid = nodeid;
 278
 279 retry:
 280         error = create_rcom(ls, nodeid, DLM_RCOM_NAMES, last_len, &rc, &mh);
 281         if (error)
 282                 goto out;
 283         memcpy(rc->rc_buf, last_name, last_len);
 284
 285         allow_sync_reply(ls, &rc->rc_id);
 286         memset(ls->ls_recover_buf, 0, LOWCOMMS_MAX_TX_BUFFER_LEN);
 287
 288         send_rcom(ls, mh, rc);
 289
 290         error = dlm_wait_function(ls, &rcom_response);
 291         disallow_sync_reply(ls);
 292         if (error == -ETIMEDOUT)
 293                 goto retry;
 294  out:
 295         return error;
 296 }
 297
 298 static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 299 {
 300         struct dlm_rcom *rc;
 301         struct dlm_mhandle *mh;
 302         int error, inlen, outlen, nodeid;
 303
 304         nodeid = rc_in->rc_header.h_nodeid;
 305         inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
 306         outlen = LOWCOMMS_MAX_TX_BUFFER_LEN - sizeof(struct dlm_rcom);
 307
 308         error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh);
 309         if (error)
 310                 return;
 311         rc->rc_id = rc_in->rc_id;
 312         rc->rc_seq_reply = rc_in->rc_seq;
 313
 314         dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
 315                               nodeid);
 316         send_rcom(ls, mh, rc);
 317 }
 318
 319 int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
 320 {
 321         struct dlm_rcom *rc;
 322         struct dlm_mhandle *mh;
 323         struct dlm_ls *ls = r->res_ls;
 324         int error;
 325
 326         error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
 327                             &rc, &mh);
 328         if (error)
 329                 goto out;
 330         memcpy(rc->rc_buf, r->res_name, r->res_length);
 331         rc->rc_id = (unsigned long) r->res_id;
 332
 333         send_rcom(ls, mh, rc);
 334  out:
 335         return error;
 336 }
 337
 338 static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 339 {
 340         struct dlm_rcom *rc;
 341         struct dlm_mhandle *mh;
 342         int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid;
 343         int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
 344
 345         error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh);
 346         if (error)
 347                 return;
 348
 349         /* Old code would send this special id to trigger a debug dump. */
 350         if (rc_in->rc_id == 0xFFFFFFFF) {
 351                 log_error(ls, "receive_rcom_lookup dump from %d", nodeid);
 352                 dlm_dump_rsb_name(ls, rc_in->rc_buf, len);
 353                 return;
 354         }
 355
 356         error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len,
 357                                   DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL);
 358         if (error)
 359                 ret_nodeid = error;
 360         rc->rc_result = ret_nodeid;
 361         rc->rc_id = rc_in->rc_id;
 362         rc->rc_seq_reply = rc_in->rc_seq;
 363
 364         send_rcom(ls, mh, rc);
 365 }
 366
 367 static void receive_rcom_lookup_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 368 {
 369         dlm_recover_master_reply(ls, rc_in);
 370 }
 371
 372 static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
 373                            struct rcom_lock *rl)
 374 {
 375         memset(rl, 0, sizeof(*rl));
 376
 377         rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
 378         rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
 379         rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
 380         rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
 381         rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
 382         rl->rl_rqmode = lkb->lkb_rqmode;
 383         rl->rl_grmode = lkb->lkb_grmode;
 384         rl->rl_status = lkb->lkb_status;
 385         rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
 386
 387         if (lkb->lkb_bastfn)
 388                 rl->rl_asts |= DLM_CB_BAST;
 389         if (lkb->lkb_astfn)
 390                 rl->rl_asts |= DLM_CB_CAST;
 391
 392         rl->rl_namelen = cpu_to_le16(r->res_length);
 393         memcpy(rl->rl_name, r->res_name, r->res_length);
 394
 395         /* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
 396            If so, receive_rcom_lock_args() won't take this copy. */
 397
 398         if (lkb->lkb_lvbptr)
 399                 memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
 400 }
 401
 402 int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 403 {
 404         struct dlm_ls *ls = r->res_ls;
 405         struct dlm_rcom *rc;
 406         struct dlm_mhandle *mh;
 407         struct rcom_lock *rl;
 408         int error, len = sizeof(struct rcom_lock);
 409
 410         if (lkb->lkb_lvbptr)
 411                 len += ls->ls_lvblen;
 412
 413         error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh);
 414         if (error)
 415                 goto out;
 416
 417         rl = (struct rcom_lock *) rc->rc_buf;
 418         pack_rcom_lock(r, lkb, rl);
 419         rc->rc_id = (unsigned long) r;
 420
 421         send_rcom(ls, mh, rc);
 422  out:
 423         return error;
 424 }
 425
 426 /* needs at least dlm_rcom + rcom_lock */
 427 static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 428 {
 429         struct dlm_rcom *rc;
 430         struct dlm_mhandle *mh;
 431         int error, nodeid = rc_in->rc_header.h_nodeid;
 432
 433         dlm_recover_master_copy(ls, rc_in);
 434
 435         error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
 436                             sizeof(struct rcom_lock), &rc, &mh);
 437         if (error)
 438                 return;
 439
 440         /* We send back the same rcom_lock struct we received, but
 441            dlm_recover_master_copy() has filled in rl_remid and rl_result */
 442
 443         memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
 444         rc->rc_id = rc_in->rc_id;
 445         rc->rc_seq_reply = rc_in->rc_seq;
 446
 447         send_rcom(ls, mh, rc);
 448 }
 449
 450 /* If the lockspace doesn't exist then still send a status message
 451    back; it's possible that it just doesn't have its global_id yet. */
 452
 453 int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
 454 {
 455         struct dlm_rcom *rc;
 456         struct rcom_config *rf;
 457         struct dlm_mhandle *mh;
 458         char *mb;
 459         int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
 460
 461         mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_NOFS, &mb);
 462         if (!mh)
 463                 return -ENOBUFS;
 464
 465         rc = (struct dlm_rcom *) mb;
 466
 467         rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
 468         rc->rc_header.h_lockspace = rc_in->rc_header.h_lockspace;
 469         rc->rc_header.h_nodeid = dlm_our_nodeid();
 470         rc->rc_header.h_length = mb_len;
 471         rc->rc_header.h_cmd = DLM_RCOM;
 472
 473         rc->rc_type = DLM_RCOM_STATUS_REPLY;
 474         rc->rc_id = rc_in->rc_id;
 475         rc->rc_seq_reply = rc_in->rc_seq;
 476         rc->rc_result = -ESRCH;
 477
 478         rf = (struct rcom_config *) rc->rc_buf;
 479         rf->rf_lvblen = cpu_to_le32(~0U);
 480
 481         dlm_rcom_out(rc);
 482         dlm_lowcomms_commit_buffer(mh);
 483
 484         return 0;
 485 }
 486
 487 /*
 488  * Ignore messages for stage Y before we set
 489  * recover_status bit for stage X:
 490  *
 491  * recover_status = 0
 492  *
 493  * dlm_recover_members()
 494  * - send nothing
 495  * - recv nothing
 496  * - ignore NAMES, NAMES_REPLY
 497  * - ignore LOOKUP, LOOKUP_REPLY
 498  * - ignore LOCK, LOCK_REPLY
 499  *
 500  * recover_status |= NODES
 501  *
 502  * dlm_recover_members_wait()
 503  *
 504  * dlm_recover_directory()
 505  * - send NAMES
 506  * - recv NAMES_REPLY
 507  * - ignore LOOKUP, LOOKUP_REPLY
 508  * - ignore LOCK, LOCK_REPLY
 509  *
 510  * recover_status |= DIR
 511  *
 512  * dlm_recover_directory_wait()
 513  *
 514  * dlm_recover_masters()
 515  * - send LOOKUP
 516  * - recv LOOKUP_REPLY
 517  *
 518  * dlm_recover_locks()
 519  * - send LOCKS
 520  * - recv LOCKS_REPLY
 521  *
 522  * recover_status |= LOCKS
 523  *
 524  * dlm_recover_locks_wait()
 525  *
 526  * recover_status |= DONE
 527  */
 528
 529 /* Called by dlm_recv; corresponds to dlm_receive_message() but special
 530    recovery-only comms are sent through here. */
 531
 532 void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
 533 {
 534         int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
 535         int stop, reply = 0, names = 0, lookup = 0, lock = 0;
 536         uint32_t status;
 537         uint64_t seq;
 538
 539         switch (rc->rc_type) {
 540         case DLM_RCOM_STATUS_REPLY:
 541                 reply = 1;
 542                 break;
 543         case DLM_RCOM_NAMES:
 544                 names = 1;
 545                 break;
 546         case DLM_RCOM_NAMES_REPLY:
 547                 names = 1;
 548                 reply = 1;
 549                 break;
 550         case DLM_RCOM_LOOKUP:
 551                 lookup = 1;
 552                 break;
 553         case DLM_RCOM_LOOKUP_REPLY:
 554                 lookup = 1;
 555                 reply = 1;
 556                 break;
 557         case DLM_RCOM_LOCK:
 558                 lock = 1;
 559                 break;
 560         case DLM_RCOM_LOCK_REPLY:
 561                 lock = 1;
 562                 reply = 1;
 563                 break;
 564         }
 565
 566         spin_lock(&ls->ls_recover_lock);
 567         status = ls->ls_recover_status;
 568         stop = test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
 569         seq = ls->ls_recover_seq;
 570         spin_unlock(&ls->ls_recover_lock);
 571
 572         if (stop && (rc->rc_type != DLM_RCOM_STATUS))
 573                 goto ignore;
 574
 575         if (reply && (rc->rc_seq_reply != seq))
 576                 goto ignore;
 577
 578         if (!(status & DLM_RS_NODES) && (names || lookup || lock))
 579                 goto ignore;
 580
 581         if (!(status & DLM_RS_DIR) && (lookup || lock))
 582                 goto ignore;
 583
 584         switch (rc->rc_type) {
 585         case DLM_RCOM_STATUS:
 586                 receive_rcom_status(ls, rc);
 587                 break;
 588
 589         case DLM_RCOM_NAMES:
 590                 receive_rcom_names(ls, rc);
 591                 break;
 592
 593         case DLM_RCOM_LOOKUP:
 594                 receive_rcom_lookup(ls, rc);
 595                 break;
 596
 597         case DLM_RCOM_LOCK:
 598                 if (rc->rc_header.h_length < lock_size)
 599                         goto Eshort;
 600                 receive_rcom_lock(ls, rc);
 601                 break;
 602
 603         case DLM_RCOM_STATUS_REPLY:
 604                 receive_sync_reply(ls, rc);
 605                 break;
 606
 607         case DLM_RCOM_NAMES_REPLY:
 608                 receive_sync_reply(ls, rc);
 609                 break;
 610
 611         case DLM_RCOM_LOOKUP_REPLY:
 612                 receive_rcom_lookup_reply(ls, rc);
 613                 break;
 614
 615         case DLM_RCOM_LOCK_REPLY:
 616                 if (rc->rc_header.h_length < lock_size)
 617                         goto Eshort;
 618                 dlm_recover_process_copy(ls, rc);
 619                 break;
 620
 621         default:
 622                 log_error(ls, "receive_rcom bad type %d", rc->rc_type);
 623         }
 624         return;
 625
 626 ignore:
 627         log_limit(ls, "dlm_receive_rcom ignore msg %d "
 628                   "from %d %llu %llu recover seq %llu sts %x gen %u",
 629                    rc->rc_type,
 630                    nodeid,
 631                    (unsigned long long)rc->rc_seq,
 632                    (unsigned long long)rc->rc_seq_reply,
 633                    (unsigned long long)seq,
 634                    status, ls->ls_generation);
 635         return;
 636 Eshort:
 637         log_error(ls, "recovery message %d from %d is too short",
 638                   rc->rc_type, nodeid);
 639 }
 640