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