fs/dlm/rcom.c

   1 /******************************************************************************
   2 *******************************************************************************
   3 **
   4 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   5 **  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
   6 **
   7 **  This copyrighted material is made available to anyone wishing to use,
   8 **  modify, copy, or redistribute it subject to the terms and conditions
   9 **  of the GNU General Public License v.2.
  10 **
  11 *******************************************************************************
  12 ******************************************************************************/
  13
  14 #include "dlm_internal.h"
  15 #include "lockspace.h"
  16 #include "member.h"
  17 #include "lowcomms.h"
  18 #include "midcomms.h"
  19 #include "rcom.h"
  20 #include "recover.h"
  21 #include "dir.h"
  22 #include "config.h"
  23 #include "memory.h"
  24 #include "lock.h"
  25 #include "util.h"
  26
  27 static int rcom_response(struct dlm_ls *ls)
  28 {
  29         return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
  30 }
  31
  32 static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
  33                        struct dlm_rcom **rc_ret, struct dlm_mhandle **mh_ret)
  34 {
  35         struct dlm_rcom *rc;
  36         struct dlm_mhandle *mh;
  37         char *mb;
  38         int mb_len = sizeof(struct dlm_rcom) + len;
  39
  40         mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_NOFS, &mb);
  41         if (!mh) {
  42                 log_print("create_rcom to %d type %d len %d ENOBUFS",
  43                           to_nodeid, type, len);
  44                 return -ENOBUFS;
  45         }
  46         memset(mb, 0, mb_len);
  47
  48         rc = (struct dlm_rcom *) mb;
  49
  50         rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
  51         rc->rc_header.h_lockspace = ls->ls_global_id;
  52         rc->rc_header.h_nodeid = dlm_our_nodeid();
  53         rc->rc_header.h_length = mb_len;
  54         rc->rc_header.h_cmd = DLM_RCOM;
  55
  56         rc->rc_type = type;
  57
  58         spin_lock(&ls->ls_recover_lock);
  59         rc->rc_seq = ls->ls_recover_seq;
  60         spin_unlock(&ls->ls_recover_lock);
  61
  62         *mh_ret = mh;
  63         *rc_ret = rc;
  64         return 0;
  65 }
  66
  67 static void send_rcom(struct dlm_ls *ls, struct dlm_mhandle *mh,
  68                       struct dlm_rcom *rc)
  69 {
  70         dlm_rcom_out(rc);
  71         dlm_lowcomms_commit_buffer(mh);
  72 }
  73
  74 static void set_rcom_status(struct dlm_ls *ls, struct rcom_status *rs,
  75                             uint32_t flags)
  76 {
  77         rs->rs_flags = cpu_to_le32(flags);
  78 }
  79
  80 /* When replying to a status request, a node also sends back its
  81    configuration values.  The requesting node then checks that the remote
  82    node is configured the same way as itself. */
  83
  84 static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
  85                             uint32_t num_slots)
  86 {
  87         rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
  88         rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
  89
  90         rf->rf_our_slot = cpu_to_le16(ls->ls_slot);
  91         rf->rf_num_slots = cpu_to_le16(num_slots);
  92         rf->rf_generation =  cpu_to_le32(ls->ls_generation);
  93 }
  94
  95 static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
  96 {
  97         struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
  98
  99         if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) {
 100                 log_error(ls, "version mismatch: %x nodeid %d: %x",
 101                           DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
 102                           rc->rc_header.h_version);
 103                 return -EPROTO;
 104         }
 105
 106         if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
 107             le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
 108                 log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
 109                           ls->ls_lvblen, ls->ls_exflags, nodeid,
 110                           le32_to_cpu(rf->rf_lvblen),
 111                           le32_to_cpu(rf->rf_lsflags));
 112                 return -EPROTO;
 113         }
 114         return 0;
 115 }
 116
 117 static void allow_sync_reply(struct dlm_ls *ls, uint64_t *new_seq)
 118 {
 119         spin_lock(&ls->ls_rcom_spin);
 120         *new_seq = ++ls->ls_rcom_seq;
 121         set_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 122         spin_unlock(&ls->ls_rcom_spin);
 123 }
 124
 125 static void disallow_sync_reply(struct dlm_ls *ls)
 126 {
 127         spin_lock(&ls->ls_rcom_spin);
 128         clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 129         clear_bit(LSFL_RCOM_READY, &ls->ls_flags);
 130         spin_unlock(&ls->ls_rcom_spin);
 131 }
 132
 133 /*
 134  * low nodeid gathers one slot value at a time from each node.
 135  * it sets need_slots=0, and saves rf_our_slot returned from each
 136  * rcom_config.
 137  *
 138  * other nodes gather all slot values at once from the low nodeid.
 139  * they set need_slots=1, and ignore the rf_our_slot returned from each
 140  * rcom_config.  they use the rf_num_slots returned from the low
 141  * node's rcom_config.
 142  */
 143
 144 int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags)
 145 {
 146         struct dlm_rcom *rc;
 147         struct dlm_mhandle *mh;
 148         int error = 0;
 149
 150         ls->ls_recover_nodeid = nodeid;
 151
 152         if (nodeid == dlm_our_nodeid()) {
 153                 rc = ls->ls_recover_buf;
 154                 rc->rc_result = dlm_recover_status(ls);
 155                 goto out;
 156         }
 157
 158 retry:
 159         error = create_rcom(ls, nodeid, DLM_RCOM_STATUS,
 160                             sizeof(struct rcom_status), &rc, &mh);
 161         if (error)
 162                 goto out;
 163
 164         set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
 165
 166         allow_sync_reply(ls, &rc->rc_id);
 167         memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
 168
 169         send_rcom(ls, mh, rc);
 170
 171         error = dlm_wait_function(ls, &rcom_response);
 172         disallow_sync_reply(ls);
 173         if (error == -ETIMEDOUT)
 174                 goto retry;
 175         if (error)
 176                 goto out;
 177
 178         rc = ls->ls_recover_buf;
 179
 180         if (rc->rc_result == -ESRCH) {
 181                 /* we pretend the remote lockspace exists with 0 status */
 182                 log_debug(ls, "remote node %d not ready", nodeid);
 183                 rc->rc_result = 0;
 184                 error = 0;
 185         } else {
 186                 error = check_rcom_config(ls, rc, nodeid);
 187         }
 188
 189         /* the caller looks at rc_result for the remote recovery status */
 190  out:
 191         return error;
 192 }
 193
 194 static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 195 {
 196         struct dlm_rcom *rc;
 197         struct dlm_mhandle *mh;
 198         struct rcom_status *rs;
 199         uint32_t status;
 200         int nodeid = rc_in->rc_header.h_nodeid;
 201         int len = sizeof(struct rcom_config);
 202         int num_slots = 0;
 203         int error;
 204
 205         if (!dlm_slots_version(&rc_in->rc_header)) {
 206                 status = dlm_recover_status(ls);
 207                 goto do_create;
 208         }
 209
 210         rs = (struct rcom_status *)rc_in->rc_buf;
 211
 212         if (!(le32_to_cpu(rs->rs_flags) & DLM_RSF_NEED_SLOTS)) {
 213                 status = dlm_recover_status(ls);
 214                 goto do_create;
 215         }
 216
 217         spin_lock(&ls->ls_recover_lock);
 218         status = ls->ls_recover_status;
 219         num_slots = ls->ls_num_slots;
 220         spin_unlock(&ls->ls_recover_lock);
 221         len += num_slots * sizeof(struct rcom_slot);
 222
 223  do_create:
 224         error = create_rcom(ls, nodeid, DLM_RCOM_STATUS_REPLY,
 225                             len, &rc, &mh);
 226         if (error)
 227                 return;
 228
 229         rc->rc_id = rc_in->rc_id;
 230         rc->rc_seq_reply = rc_in->rc_seq;
 231         rc->rc_result = status;
 232
 233         set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, num_slots);
 234
 235         if (!num_slots)
 236                 goto do_send;
 237
 238         spin_lock(&ls->ls_recover_lock);
 239         if (ls->ls_num_slots != num_slots) {
 240                 spin_unlock(&ls->ls_recover_lock);
 241                 log_debug(ls, "receive_rcom_status num_slots %d to %d",
 242                           num_slots, ls->ls_num_slots);
 243                 rc->rc_result = 0;
 244                 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, 0);
 245                 goto do_send;
 246         }
 247
 248         dlm_slots_copy_out(ls, rc);
 249         spin_unlock(&ls->ls_recover_lock);
 250
 251  do_send:
 252         send_rcom(ls, mh, rc);
 253 }
 254
 255 static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 256 {
 257         spin_lock(&ls->ls_rcom_spin);
 258         if (!test_bit(LSFL_RCOM_WAIT, &ls->ls_flags) ||
 259             rc_in->rc_id != ls->ls_rcom_seq) {
 260                 log_debug(ls, "reject reply %d from %d seq %llx expect %llx",
 261                           rc_in->rc_type, rc_in->rc_header.h_nodeid,
 262                           (unsigned long long)rc_in->rc_id,
 263                           (unsigned long long)ls->ls_rcom_seq);
 264                 goto out;
 265         }
 266         memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length);
 267         set_bit(LSFL_RCOM_READY, &ls->ls_flags);
 268         clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
 269         wake_up(&ls->ls_wait_general);
 270  out:
 271         spin_unlock(&ls->ls_rcom_spin);
 272 }
 273
 274 int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
 275 {
 276         struct dlm_rcom *rc;
 277         struct dlm_mhandle *mh;
 278         int error = 0;
 279
 280         ls->ls_recover_nodeid = nodeid;
 281
 282 retry:
 283         error = create_rcom(ls, nodeid, DLM_RCOM_NAMES, last_len, &rc, &mh);
 284         if (error)
 285                 goto out;
 286         memcpy(rc->rc_buf, last_name, last_len);
 287
 288         allow_sync_reply(ls, &rc->rc_id);
 289         memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
 290
 291         send_rcom(ls, mh, rc);
 292
 293         error = dlm_wait_function(ls, &rcom_response);
 294         disallow_sync_reply(ls);
 295         if (error == -ETIMEDOUT)
 296                 goto retry;
 297  out:
 298         return error;
 299 }
 300
 301 static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 302 {
 303         struct dlm_rcom *rc;
 304         struct dlm_mhandle *mh;
 305         int error, inlen, outlen, nodeid;
 306
 307         nodeid = rc_in->rc_header.h_nodeid;
 308         inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
 309         outlen = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom);
 310
 311         error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh);
 312         if (error)
 313                 return;
 314         rc->rc_id = rc_in->rc_id;
 315         rc->rc_seq_reply = rc_in->rc_seq;
 316
 317         dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
 318                               nodeid);
 319         send_rcom(ls, mh, rc);
 320 }
 321
 322 int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
 323 {
 324         struct dlm_rcom *rc;
 325         struct dlm_mhandle *mh;
 326         struct dlm_ls *ls = r->res_ls;
 327         int error;
 328
 329         error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
 330                             &rc, &mh);
 331         if (error)
 332                 goto out;
 333         memcpy(rc->rc_buf, r->res_name, r->res_length);
 334         rc->rc_id = (unsigned long) r->res_id;
 335
 336         send_rcom(ls, mh, rc);
 337  out:
 338         return error;
 339 }
 340
 341 static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 342 {
 343         struct dlm_rcom *rc;
 344         struct dlm_mhandle *mh;
 345         int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid;
 346         int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
 347
 348         error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh);
 349         if (error)
 350                 return;
 351
 352         /* Old code would send this special id to trigger a debug dump. */
 353         if (rc_in->rc_id == 0xFFFFFFFF) {
 354                 log_error(ls, "receive_rcom_lookup dump from %d", nodeid);
 355                 dlm_dump_rsb_name(ls, rc_in->rc_buf, len);
 356                 return;
 357         }
 358
 359         error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len,
 360                                   DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL);
 361         if (error)
 362                 ret_nodeid = error;
 363         rc->rc_result = ret_nodeid;
 364         rc->rc_id = rc_in->rc_id;
 365         rc->rc_seq_reply = rc_in->rc_seq;
 366
 367         send_rcom(ls, mh, rc);
 368 }
 369
 370 static void receive_rcom_lookup_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 371 {
 372         dlm_recover_master_reply(ls, rc_in);
 373 }
 374
 375 static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
 376                            struct rcom_lock *rl)
 377 {
 378         memset(rl, 0, sizeof(*rl));
 379
 380         rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
 381         rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
 382         rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
 383         rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
 384         rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
 385         rl->rl_rqmode = lkb->lkb_rqmode;
 386         rl->rl_grmode = lkb->lkb_grmode;
 387         rl->rl_status = lkb->lkb_status;
 388         rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
 389
 390         if (lkb->lkb_bastfn)
 391                 rl->rl_asts |= DLM_CB_BAST;
 392         if (lkb->lkb_astfn)
 393                 rl->rl_asts |= DLM_CB_CAST;
 394
 395         rl->rl_namelen = cpu_to_le16(r->res_length);
 396         memcpy(rl->rl_name, r->res_name, r->res_length);
 397
 398         /* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
 399            If so, receive_rcom_lock_args() won't take this copy. */
 400
 401         if (lkb->lkb_lvbptr)
 402                 memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
 403 }
 404
 405 int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 406 {
 407         struct dlm_ls *ls = r->res_ls;
 408         struct dlm_rcom *rc;
 409         struct dlm_mhandle *mh;
 410         struct rcom_lock *rl;
 411         int error, len = sizeof(struct rcom_lock);
 412
 413         if (lkb->lkb_lvbptr)
 414                 len += ls->ls_lvblen;
 415
 416         error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh);
 417         if (error)
 418                 goto out;
 419
 420         rl = (struct rcom_lock *) rc->rc_buf;
 421         pack_rcom_lock(r, lkb, rl);
 422         rc->rc_id = (unsigned long) r;
 423
 424         send_rcom(ls, mh, rc);
 425  out:
 426         return error;
 427 }
 428
 429 /* needs at least dlm_rcom + rcom_lock */
 430 static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 431 {
 432         struct dlm_rcom *rc;
 433         struct dlm_mhandle *mh;
 434         int error, nodeid = rc_in->rc_header.h_nodeid;
 435
 436         dlm_recover_master_copy(ls, rc_in);
 437
 438         error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
 439                             sizeof(struct rcom_lock), &rc, &mh);
 440         if (error)
 441                 return;
 442
 443         /* We send back the same rcom_lock struct we received, but
 444            dlm_recover_master_copy() has filled in rl_remid and rl_result */
 445
 446         memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
 447         rc->rc_id = rc_in->rc_id;
 448         rc->rc_seq_reply = rc_in->rc_seq;
 449
 450         send_rcom(ls, mh, rc);
 451 }
 452
 453 /* If the lockspace doesn't exist then still send a status message
 454    back; it's possible that it just doesn't have its global_id yet. */
 455
 456 int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
 457 {
 458         struct dlm_rcom *rc;
 459         struct rcom_config *rf;
 460         struct dlm_mhandle *mh;
 461         char *mb;
 462         int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
 463
 464         mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_NOFS, &mb);
 465         if (!mh)
 466                 return -ENOBUFS;
 467         memset(mb, 0, mb_len);
 468
 469         rc = (struct dlm_rcom *) mb;
 470
 471         rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
 472         rc->rc_header.h_lockspace = rc_in->rc_header.h_lockspace;
 473         rc->rc_header.h_nodeid = dlm_our_nodeid();
 474         rc->rc_header.h_length = mb_len;
 475         rc->rc_header.h_cmd = DLM_RCOM;
 476
 477         rc->rc_type = DLM_RCOM_STATUS_REPLY;
 478         rc->rc_id = rc_in->rc_id;
 479         rc->rc_seq_reply = rc_in->rc_seq;
 480         rc->rc_result = -ESRCH;
 481
 482         rf = (struct rcom_config *) rc->rc_buf;
 483         rf->rf_lvblen = cpu_to_le32(~0U);
 484
 485         dlm_rcom_out(rc);
 486         dlm_lowcomms_commit_buffer(mh);
 487
 488         return 0;
 489 }
 490
 491 /*
 492  * Ignore messages for stage Y before we set
 493  * recover_status bit for stage X:
 494  *
 495  * recover_status = 0
 496  *
 497  * dlm_recover_members()
 498  * - send nothing
 499  * - recv nothing
 500  * - ignore NAMES, NAMES_REPLY
 501  * - ignore LOOKUP, LOOKUP_REPLY
 502  * - ignore LOCK, LOCK_REPLY
 503  *
 504  * recover_status |= NODES
 505  *
 506  * dlm_recover_members_wait()
 507  *
 508  * dlm_recover_directory()
 509  * - send NAMES
 510  * - recv NAMES_REPLY
 511  * - ignore LOOKUP, LOOKUP_REPLY
 512  * - ignore LOCK, LOCK_REPLY
 513  *
 514  * recover_status |= DIR
 515  *
 516  * dlm_recover_directory_wait()
 517  *
 518  * dlm_recover_masters()
 519  * - send LOOKUP
 520  * - recv LOOKUP_REPLY
 521  *
 522  * dlm_recover_locks()
 523  * - send LOCKS
 524  * - recv LOCKS_REPLY
 525  *
 526  * recover_status |= LOCKS
 527  *
 528  * dlm_recover_locks_wait()
 529  *
 530  * recover_status |= DONE
 531  */
 532
 533 /* Called by dlm_recv; corresponds to dlm_receive_message() but special
 534    recovery-only comms are sent through here. */
 535
 536 void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
 537 {
 538         int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
 539         int stop, reply = 0, names = 0, lookup = 0, lock = 0;
 540         uint32_t status;
 541         uint64_t seq;
 542
 543         switch (rc->rc_type) {
 544         case DLM_RCOM_STATUS_REPLY:
 545                 reply = 1;
 546                 break;
 547         case DLM_RCOM_NAMES:
 548                 names = 1;
 549                 break;
 550         case DLM_RCOM_NAMES_REPLY:
 551                 names = 1;
 552                 reply = 1;
 553                 break;
 554         case DLM_RCOM_LOOKUP:
 555                 lookup = 1;
 556                 break;
 557         case DLM_RCOM_LOOKUP_REPLY:
 558                 lookup = 1;
 559                 reply = 1;
 560                 break;
 561         case DLM_RCOM_LOCK:
 562                 lock = 1;
 563                 break;
 564         case DLM_RCOM_LOCK_REPLY:
 565                 lock = 1;
 566                 reply = 1;
 567                 break;
 568         };
 569
 570         spin_lock(&ls->ls_recover_lock);
 571         status = ls->ls_recover_status;
 572         stop = test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
 573         seq = ls->ls_recover_seq;
 574         spin_unlock(&ls->ls_recover_lock);
 575
 576         if (stop && (rc->rc_type != DLM_RCOM_STATUS))
 577                 goto ignore;
 578
 579         if (reply && (rc->rc_seq_reply != seq))
 580                 goto ignore;
 581
 582         if (!(status & DLM_RS_NODES) && (names || lookup || lock))
 583                 goto ignore;
 584
 585         if (!(status & DLM_RS_DIR) && (lookup || lock))
 586                 goto ignore;
 587
 588         switch (rc->rc_type) {
 589         case DLM_RCOM_STATUS:
 590                 receive_rcom_status(ls, rc);
 591                 break;
 592
 593         case DLM_RCOM_NAMES:
 594                 receive_rcom_names(ls, rc);
 595                 break;
 596
 597         case DLM_RCOM_LOOKUP:
 598                 receive_rcom_lookup(ls, rc);
 599                 break;
 600
 601         case DLM_RCOM_LOCK:
 602                 if (rc->rc_header.h_length < lock_size)
 603                         goto Eshort;
 604                 receive_rcom_lock(ls, rc);
 605                 break;
 606
 607         case DLM_RCOM_STATUS_REPLY:
 608                 receive_sync_reply(ls, rc);
 609                 break;
 610
 611         case DLM_RCOM_NAMES_REPLY:
 612                 receive_sync_reply(ls, rc);
 613                 break;
 614
 615         case DLM_RCOM_LOOKUP_REPLY:
 616                 receive_rcom_lookup_reply(ls, rc);
 617                 break;
 618
 619         case DLM_RCOM_LOCK_REPLY:
 620                 if (rc->rc_header.h_length < lock_size)
 621                         goto Eshort;
 622                 dlm_recover_process_copy(ls, rc);
 623                 break;
 624
 625         default:
 626                 log_error(ls, "receive_rcom bad type %d", rc->rc_type);
 627         }
 628         return;
 629
 630 ignore:
 631         log_limit(ls, "dlm_receive_rcom ignore msg %d "
 632                   "from %d %llu %llu recover seq %llu sts %x gen %u",
 633                    rc->rc_type,
 634                    nodeid,
 635                    (unsigned long long)rc->rc_seq,
 636                    (unsigned long long)rc->rc_seq_reply,
 637                    (unsigned long long)seq,
 638                    status, ls->ls_generation);
 639         return;
 640 Eshort:
 641         log_error(ls, "recovery message %d from %d is too short",
 642                   rc->rc_type, nodeid);
 643 }
 644