Loading...
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
25static int rcom_response(struct dlm_ls *ls)
26{
27 return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
28}
29
30static void _create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
31 struct dlm_rcom **rc_ret, char *mb, int mb_len,
32 uint64_t seq)
33{
34 struct dlm_rcom *rc;
35
36 rc = (struct dlm_rcom *) mb;
37
38 rc->rc_header.h_version = cpu_to_le32(DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
39 rc->rc_header.u.h_lockspace = cpu_to_le32(ls->ls_global_id);
40 rc->rc_header.h_nodeid = cpu_to_le32(dlm_our_nodeid());
41 rc->rc_header.h_length = cpu_to_le16(mb_len);
42 rc->rc_header.h_cmd = DLM_RCOM;
43
44 rc->rc_type = cpu_to_le32(type);
45 rc->rc_seq = cpu_to_le64(seq);
46
47 *rc_ret = rc;
48}
49
50static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
51 struct dlm_rcom **rc_ret, struct dlm_mhandle **mh_ret,
52 uint64_t seq)
53{
54 int mb_len = sizeof(struct dlm_rcom) + len;
55 struct dlm_mhandle *mh;
56 char *mb;
57
58 mh = dlm_midcomms_get_mhandle(to_nodeid, mb_len, GFP_NOFS, &mb);
59 if (!mh) {
60 log_print("%s to %d type %d len %d ENOBUFS",
61 __func__, to_nodeid, type, len);
62 return -ENOBUFS;
63 }
64
65 _create_rcom(ls, to_nodeid, type, len, rc_ret, mb, mb_len, seq);
66 *mh_ret = mh;
67 return 0;
68}
69
70static int create_rcom_stateless(struct dlm_ls *ls, int to_nodeid, int type,
71 int len, struct dlm_rcom **rc_ret,
72 struct dlm_msg **msg_ret, uint64_t seq)
73{
74 int mb_len = sizeof(struct dlm_rcom) + len;
75 struct dlm_msg *msg;
76 char *mb;
77
78 msg = dlm_lowcomms_new_msg(to_nodeid, mb_len, GFP_NOFS, &mb,
79 NULL, NULL);
80 if (!msg) {
81 log_print("create_rcom to %d type %d len %d ENOBUFS",
82 to_nodeid, type, len);
83 return -ENOBUFS;
84 }
85
86 _create_rcom(ls, to_nodeid, type, len, rc_ret, mb, mb_len, seq);
87 *msg_ret = msg;
88 return 0;
89}
90
91static void send_rcom(struct dlm_mhandle *mh, struct dlm_rcom *rc)
92{
93 dlm_midcomms_commit_mhandle(mh, NULL, 0);
94}
95
96static void send_rcom_stateless(struct dlm_msg *msg, struct dlm_rcom *rc)
97{
98 dlm_lowcomms_commit_msg(msg);
99 dlm_lowcomms_put_msg(msg);
100}
101
102static void set_rcom_status(struct dlm_ls *ls, struct rcom_status *rs,
103 uint32_t flags)
104{
105 rs->rs_flags = cpu_to_le32(flags);
106}
107
108/* When replying to a status request, a node also sends back its
109 configuration values. The requesting node then checks that the remote
110 node is configured the same way as itself. */
111
112static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
113 uint32_t num_slots)
114{
115 rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
116 rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
117
118 rf->rf_our_slot = cpu_to_le16(ls->ls_slot);
119 rf->rf_num_slots = cpu_to_le16(num_slots);
120 rf->rf_generation = cpu_to_le32(ls->ls_generation);
121}
122
123static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
124{
125 struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
126
127 if ((le32_to_cpu(rc->rc_header.h_version) & 0xFFFF0000) != DLM_HEADER_MAJOR) {
128 log_error(ls, "version mismatch: %x nodeid %d: %x",
129 DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
130 le32_to_cpu(rc->rc_header.h_version));
131 return -EPROTO;
132 }
133
134 if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
135 le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
136 log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
137 ls->ls_lvblen, ls->ls_exflags, nodeid,
138 le32_to_cpu(rf->rf_lvblen),
139 le32_to_cpu(rf->rf_lsflags));
140 return -EPROTO;
141 }
142 return 0;
143}
144
145static void allow_sync_reply(struct dlm_ls *ls, __le64 *new_seq)
146{
147 spin_lock(&ls->ls_rcom_spin);
148 *new_seq = cpu_to_le64(++ls->ls_rcom_seq);
149 set_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
150 spin_unlock(&ls->ls_rcom_spin);
151}
152
153static void disallow_sync_reply(struct dlm_ls *ls)
154{
155 spin_lock(&ls->ls_rcom_spin);
156 clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
157 clear_bit(LSFL_RCOM_READY, &ls->ls_flags);
158 spin_unlock(&ls->ls_rcom_spin);
159}
160
161/*
162 * low nodeid gathers one slot value at a time from each node.
163 * it sets need_slots=0, and saves rf_our_slot returned from each
164 * rcom_config.
165 *
166 * other nodes gather all slot values at once from the low nodeid.
167 * they set need_slots=1, and ignore the rf_our_slot returned from each
168 * rcom_config. they use the rf_num_slots returned from the low
169 * node's rcom_config.
170 */
171
172int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags,
173 uint64_t seq)
174{
175 struct dlm_rcom *rc;
176 struct dlm_msg *msg;
177 int error = 0;
178
179 ls->ls_recover_nodeid = nodeid;
180
181 if (nodeid == dlm_our_nodeid()) {
182 rc = ls->ls_recover_buf;
183 rc->rc_result = cpu_to_le32(dlm_recover_status(ls));
184 goto out;
185 }
186
187retry:
188 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_STATUS,
189 sizeof(struct rcom_status), &rc, &msg,
190 seq);
191 if (error)
192 goto out;
193
194 set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
195
196 allow_sync_reply(ls, &rc->rc_id);
197 memset(ls->ls_recover_buf, 0, DLM_MAX_SOCKET_BUFSIZE);
198
199 send_rcom_stateless(msg, rc);
200
201 error = dlm_wait_function(ls, &rcom_response);
202 disallow_sync_reply(ls);
203 if (error == -ETIMEDOUT)
204 goto retry;
205 if (error)
206 goto out;
207
208 rc = ls->ls_recover_buf;
209
210 if (rc->rc_result == cpu_to_le32(-ESRCH)) {
211 /* we pretend the remote lockspace exists with 0 status */
212 log_debug(ls, "remote node %d not ready", nodeid);
213 rc->rc_result = 0;
214 error = 0;
215 } else {
216 error = check_rcom_config(ls, rc, nodeid);
217 }
218
219 /* the caller looks at rc_result for the remote recovery status */
220 out:
221 return error;
222}
223
224static void receive_rcom_status(struct dlm_ls *ls,
225 const struct dlm_rcom *rc_in,
226 uint64_t seq)
227{
228 struct dlm_rcom *rc;
229 struct rcom_status *rs;
230 uint32_t status;
231 int nodeid = le32_to_cpu(rc_in->rc_header.h_nodeid);
232 int len = sizeof(struct rcom_config);
233 struct dlm_msg *msg;
234 int num_slots = 0;
235 int error;
236
237 if (!dlm_slots_version(&rc_in->rc_header)) {
238 status = dlm_recover_status(ls);
239 goto do_create;
240 }
241
242 rs = (struct rcom_status *)rc_in->rc_buf;
243
244 if (!(le32_to_cpu(rs->rs_flags) & DLM_RSF_NEED_SLOTS)) {
245 status = dlm_recover_status(ls);
246 goto do_create;
247 }
248
249 spin_lock(&ls->ls_recover_lock);
250 status = ls->ls_recover_status;
251 num_slots = ls->ls_num_slots;
252 spin_unlock(&ls->ls_recover_lock);
253 len += num_slots * sizeof(struct rcom_slot);
254
255 do_create:
256 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_STATUS_REPLY,
257 len, &rc, &msg, seq);
258 if (error)
259 return;
260
261 rc->rc_id = rc_in->rc_id;
262 rc->rc_seq_reply = rc_in->rc_seq;
263 rc->rc_result = cpu_to_le32(status);
264
265 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, num_slots);
266
267 if (!num_slots)
268 goto do_send;
269
270 spin_lock(&ls->ls_recover_lock);
271 if (ls->ls_num_slots != num_slots) {
272 spin_unlock(&ls->ls_recover_lock);
273 log_debug(ls, "receive_rcom_status num_slots %d to %d",
274 num_slots, ls->ls_num_slots);
275 rc->rc_result = 0;
276 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, 0);
277 goto do_send;
278 }
279
280 dlm_slots_copy_out(ls, rc);
281 spin_unlock(&ls->ls_recover_lock);
282
283 do_send:
284 send_rcom_stateless(msg, rc);
285}
286
287static void receive_sync_reply(struct dlm_ls *ls, const struct dlm_rcom *rc_in)
288{
289 spin_lock(&ls->ls_rcom_spin);
290 if (!test_bit(LSFL_RCOM_WAIT, &ls->ls_flags) ||
291 le64_to_cpu(rc_in->rc_id) != ls->ls_rcom_seq) {
292 log_debug(ls, "reject reply %d from %d seq %llx expect %llx",
293 le32_to_cpu(rc_in->rc_type),
294 le32_to_cpu(rc_in->rc_header.h_nodeid),
295 (unsigned long long)le64_to_cpu(rc_in->rc_id),
296 (unsigned long long)ls->ls_rcom_seq);
297 goto out;
298 }
299 memcpy(ls->ls_recover_buf, rc_in,
300 le16_to_cpu(rc_in->rc_header.h_length));
301 set_bit(LSFL_RCOM_READY, &ls->ls_flags);
302 clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
303 wake_up(&ls->ls_wait_general);
304 out:
305 spin_unlock(&ls->ls_rcom_spin);
306}
307
308int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name,
309 int last_len, uint64_t seq)
310{
311 struct dlm_mhandle *mh;
312 struct dlm_rcom *rc;
313 int error = 0;
314
315 ls->ls_recover_nodeid = nodeid;
316
317retry:
318 error = create_rcom(ls, nodeid, DLM_RCOM_NAMES, last_len,
319 &rc, &mh, seq);
320 if (error)
321 goto out;
322 memcpy(rc->rc_buf, last_name, last_len);
323
324 allow_sync_reply(ls, &rc->rc_id);
325 memset(ls->ls_recover_buf, 0, DLM_MAX_SOCKET_BUFSIZE);
326
327 send_rcom(mh, rc);
328
329 error = dlm_wait_function(ls, &rcom_response);
330 disallow_sync_reply(ls);
331 if (error == -ETIMEDOUT)
332 goto retry;
333 out:
334 return error;
335}
336
337static void receive_rcom_names(struct dlm_ls *ls, const struct dlm_rcom *rc_in,
338 uint64_t seq)
339{
340 struct dlm_mhandle *mh;
341 struct dlm_rcom *rc;
342 int error, inlen, outlen, nodeid;
343
344 nodeid = le32_to_cpu(rc_in->rc_header.h_nodeid);
345 inlen = le16_to_cpu(rc_in->rc_header.h_length) -
346 sizeof(struct dlm_rcom);
347 outlen = DLM_MAX_APP_BUFSIZE - sizeof(struct dlm_rcom);
348
349 error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen,
350 &rc, &mh, seq);
351 if (error)
352 return;
353 rc->rc_id = rc_in->rc_id;
354 rc->rc_seq_reply = rc_in->rc_seq;
355
356 dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
357 nodeid);
358 send_rcom(mh, rc);
359}
360
361int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid, uint64_t seq)
362{
363 struct dlm_rcom *rc;
364 struct dlm_mhandle *mh;
365 struct dlm_ls *ls = r->res_ls;
366 int error;
367
368 error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
369 &rc, &mh, seq);
370 if (error)
371 goto out;
372 memcpy(rc->rc_buf, r->res_name, r->res_length);
373 rc->rc_id = cpu_to_le64(r->res_id);
374
375 send_rcom(mh, rc);
376 out:
377 return error;
378}
379
380static void receive_rcom_lookup(struct dlm_ls *ls,
381 const struct dlm_rcom *rc_in, uint64_t seq)
382{
383 struct dlm_rcom *rc;
384 struct dlm_mhandle *mh;
385 int error, ret_nodeid, nodeid = le32_to_cpu(rc_in->rc_header.h_nodeid);
386 int len = le16_to_cpu(rc_in->rc_header.h_length) -
387 sizeof(struct dlm_rcom);
388
389 /* Old code would send this special id to trigger a debug dump. */
390 if (rc_in->rc_id == cpu_to_le64(0xFFFFFFFF)) {
391 log_error(ls, "receive_rcom_lookup dump from %d", nodeid);
392 dlm_dump_rsb_name(ls, rc_in->rc_buf, len);
393 return;
394 }
395
396 error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh,
397 seq);
398 if (error)
399 return;
400
401 error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len,
402 DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL);
403 if (error)
404 ret_nodeid = error;
405 rc->rc_result = cpu_to_le32(ret_nodeid);
406 rc->rc_id = rc_in->rc_id;
407 rc->rc_seq_reply = rc_in->rc_seq;
408
409 send_rcom(mh, rc);
410}
411
412static void receive_rcom_lookup_reply(struct dlm_ls *ls,
413 const struct dlm_rcom *rc_in)
414{
415 dlm_recover_master_reply(ls, rc_in);
416}
417
418static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
419 struct rcom_lock *rl)
420{
421 memset(rl, 0, sizeof(*rl));
422
423 rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
424 rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
425 rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
426 rl->rl_flags = cpu_to_le32(dlm_dflags_val(lkb));
427 rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
428 rl->rl_rqmode = lkb->lkb_rqmode;
429 rl->rl_grmode = lkb->lkb_grmode;
430 rl->rl_status = lkb->lkb_status;
431 rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
432
433 if (lkb->lkb_bastfn)
434 rl->rl_asts |= DLM_CB_BAST;
435 if (lkb->lkb_astfn)
436 rl->rl_asts |= DLM_CB_CAST;
437
438 rl->rl_namelen = cpu_to_le16(r->res_length);
439 memcpy(rl->rl_name, r->res_name, r->res_length);
440
441 /* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
442 If so, receive_rcom_lock_args() won't take this copy. */
443
444 if (lkb->lkb_lvbptr)
445 memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
446}
447
448int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb, uint64_t seq)
449{
450 struct dlm_ls *ls = r->res_ls;
451 struct dlm_rcom *rc;
452 struct dlm_mhandle *mh;
453 struct rcom_lock *rl;
454 int error, len = sizeof(struct rcom_lock);
455
456 if (lkb->lkb_lvbptr)
457 len += ls->ls_lvblen;
458
459 error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh,
460 seq);
461 if (error)
462 goto out;
463
464 rl = (struct rcom_lock *) rc->rc_buf;
465 pack_rcom_lock(r, lkb, rl);
466 rc->rc_id = cpu_to_le64((uintptr_t)r);
467
468 send_rcom(mh, rc);
469 out:
470 return error;
471}
472
473/* needs at least dlm_rcom + rcom_lock */
474static void receive_rcom_lock(struct dlm_ls *ls, const struct dlm_rcom *rc_in,
475 uint64_t seq)
476{
477 __le32 rl_remid, rl_result;
478 struct rcom_lock *rl;
479 struct dlm_rcom *rc;
480 struct dlm_mhandle *mh;
481 int error, nodeid = le32_to_cpu(rc_in->rc_header.h_nodeid);
482
483 dlm_recover_master_copy(ls, rc_in, &rl_remid, &rl_result);
484
485 error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
486 sizeof(struct rcom_lock), &rc, &mh, seq);
487 if (error)
488 return;
489
490 memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
491 rl = (struct rcom_lock *)rc->rc_buf;
492 /* set rl_remid and rl_result from dlm_recover_master_copy() */
493 rl->rl_remid = rl_remid;
494 rl->rl_result = rl_result;
495
496 rc->rc_id = rc_in->rc_id;
497 rc->rc_seq_reply = rc_in->rc_seq;
498
499 send_rcom(mh, rc);
500}
501
502/* If the lockspace doesn't exist then still send a status message
503 back; it's possible that it just doesn't have its global_id yet. */
504
505int dlm_send_ls_not_ready(int nodeid, const struct dlm_rcom *rc_in)
506{
507 struct dlm_rcom *rc;
508 struct rcom_config *rf;
509 struct dlm_mhandle *mh;
510 char *mb;
511 int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
512
513 mh = dlm_midcomms_get_mhandle(nodeid, mb_len, GFP_NOFS, &mb);
514 if (!mh)
515 return -ENOBUFS;
516
517 rc = (struct dlm_rcom *) mb;
518
519 rc->rc_header.h_version = cpu_to_le32(DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
520 rc->rc_header.u.h_lockspace = rc_in->rc_header.u.h_lockspace;
521 rc->rc_header.h_nodeid = cpu_to_le32(dlm_our_nodeid());
522 rc->rc_header.h_length = cpu_to_le16(mb_len);
523 rc->rc_header.h_cmd = DLM_RCOM;
524
525 rc->rc_type = cpu_to_le32(DLM_RCOM_STATUS_REPLY);
526 rc->rc_id = rc_in->rc_id;
527 rc->rc_seq_reply = rc_in->rc_seq;
528 rc->rc_result = cpu_to_le32(-ESRCH);
529
530 rf = (struct rcom_config *) rc->rc_buf;
531 rf->rf_lvblen = cpu_to_le32(~0U);
532
533 dlm_midcomms_commit_mhandle(mh, NULL, 0);
534
535 return 0;
536}
537
538/*
539 * Ignore messages for stage Y before we set
540 * recover_status bit for stage X:
541 *
542 * recover_status = 0
543 *
544 * dlm_recover_members()
545 * - send nothing
546 * - recv nothing
547 * - ignore NAMES, NAMES_REPLY
548 * - ignore LOOKUP, LOOKUP_REPLY
549 * - ignore LOCK, LOCK_REPLY
550 *
551 * recover_status |= NODES
552 *
553 * dlm_recover_members_wait()
554 *
555 * dlm_recover_directory()
556 * - send NAMES
557 * - recv NAMES_REPLY
558 * - ignore LOOKUP, LOOKUP_REPLY
559 * - ignore LOCK, LOCK_REPLY
560 *
561 * recover_status |= DIR
562 *
563 * dlm_recover_directory_wait()
564 *
565 * dlm_recover_masters()
566 * - send LOOKUP
567 * - recv LOOKUP_REPLY
568 *
569 * dlm_recover_locks()
570 * - send LOCKS
571 * - recv LOCKS_REPLY
572 *
573 * recover_status |= LOCKS
574 *
575 * dlm_recover_locks_wait()
576 *
577 * recover_status |= DONE
578 */
579
580/* Called by dlm_recv; corresponds to dlm_receive_message() but special
581 recovery-only comms are sent through here. */
582
583void dlm_receive_rcom(struct dlm_ls *ls, const struct dlm_rcom *rc, int nodeid)
584{
585 int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
586 int stop, reply = 0, names = 0, lookup = 0, lock = 0;
587 uint32_t status;
588 uint64_t seq;
589
590 switch (rc->rc_type) {
591 case cpu_to_le32(DLM_RCOM_STATUS_REPLY):
592 reply = 1;
593 break;
594 case cpu_to_le32(DLM_RCOM_NAMES):
595 names = 1;
596 break;
597 case cpu_to_le32(DLM_RCOM_NAMES_REPLY):
598 names = 1;
599 reply = 1;
600 break;
601 case cpu_to_le32(DLM_RCOM_LOOKUP):
602 lookup = 1;
603 break;
604 case cpu_to_le32(DLM_RCOM_LOOKUP_REPLY):
605 lookup = 1;
606 reply = 1;
607 break;
608 case cpu_to_le32(DLM_RCOM_LOCK):
609 lock = 1;
610 break;
611 case cpu_to_le32(DLM_RCOM_LOCK_REPLY):
612 lock = 1;
613 reply = 1;
614 break;
615 }
616
617 spin_lock(&ls->ls_recover_lock);
618 status = ls->ls_recover_status;
619 stop = dlm_recovery_stopped(ls);
620 seq = ls->ls_recover_seq;
621 spin_unlock(&ls->ls_recover_lock);
622
623 if (stop && (rc->rc_type != cpu_to_le32(DLM_RCOM_STATUS)))
624 goto ignore;
625
626 if (reply && (le64_to_cpu(rc->rc_seq_reply) != seq))
627 goto ignore;
628
629 if (!(status & DLM_RS_NODES) && (names || lookup || lock))
630 goto ignore;
631
632 if (!(status & DLM_RS_DIR) && (lookup || lock))
633 goto ignore;
634
635 switch (rc->rc_type) {
636 case cpu_to_le32(DLM_RCOM_STATUS):
637 receive_rcom_status(ls, rc, seq);
638 break;
639
640 case cpu_to_le32(DLM_RCOM_NAMES):
641 receive_rcom_names(ls, rc, seq);
642 break;
643
644 case cpu_to_le32(DLM_RCOM_LOOKUP):
645 receive_rcom_lookup(ls, rc, seq);
646 break;
647
648 case cpu_to_le32(DLM_RCOM_LOCK):
649 if (le16_to_cpu(rc->rc_header.h_length) < lock_size)
650 goto Eshort;
651 receive_rcom_lock(ls, rc, seq);
652 break;
653
654 case cpu_to_le32(DLM_RCOM_STATUS_REPLY):
655 receive_sync_reply(ls, rc);
656 break;
657
658 case cpu_to_le32(DLM_RCOM_NAMES_REPLY):
659 receive_sync_reply(ls, rc);
660 break;
661
662 case cpu_to_le32(DLM_RCOM_LOOKUP_REPLY):
663 receive_rcom_lookup_reply(ls, rc);
664 break;
665
666 case cpu_to_le32(DLM_RCOM_LOCK_REPLY):
667 if (le16_to_cpu(rc->rc_header.h_length) < lock_size)
668 goto Eshort;
669 dlm_recover_process_copy(ls, rc, seq);
670 break;
671
672 default:
673 log_error(ls, "receive_rcom bad type %d",
674 le32_to_cpu(rc->rc_type));
675 }
676 return;
677
678ignore:
679 log_limit(ls, "dlm_receive_rcom ignore msg %d "
680 "from %d %llu %llu recover seq %llu sts %x gen %u",
681 le32_to_cpu(rc->rc_type),
682 nodeid,
683 (unsigned long long)le64_to_cpu(rc->rc_seq),
684 (unsigned long long)le64_to_cpu(rc->rc_seq_reply),
685 (unsigned long long)seq,
686 status, ls->ls_generation);
687 return;
688Eshort:
689 log_error(ls, "recovery message %d from %d is too short",
690 le32_to_cpu(rc->rc_type), nodeid);
691}
692
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
25static int rcom_response(struct dlm_ls *ls)
26{
27 return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
28}
29
30static void _create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
31 struct dlm_rcom **rc_ret, char *mb, int mb_len)
32{
33 struct dlm_rcom *rc;
34
35 rc = (struct dlm_rcom *) mb;
36
37 rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
38 rc->rc_header.u.h_lockspace = ls->ls_global_id;
39 rc->rc_header.h_nodeid = dlm_our_nodeid();
40 rc->rc_header.h_length = mb_len;
41 rc->rc_header.h_cmd = DLM_RCOM;
42
43 rc->rc_type = type;
44
45 spin_lock(&ls->ls_recover_lock);
46 rc->rc_seq = ls->ls_recover_seq;
47 spin_unlock(&ls->ls_recover_lock);
48
49 *rc_ret = rc;
50}
51
52static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
53 struct dlm_rcom **rc_ret, struct dlm_mhandle **mh_ret)
54{
55 int mb_len = sizeof(struct dlm_rcom) + len;
56 struct dlm_mhandle *mh;
57 char *mb;
58
59 mh = dlm_midcomms_get_mhandle(to_nodeid, mb_len, GFP_NOFS, &mb);
60 if (!mh) {
61 log_print("%s to %d type %d len %d ENOBUFS",
62 __func__, to_nodeid, type, len);
63 return -ENOBUFS;
64 }
65
66 _create_rcom(ls, to_nodeid, type, len, rc_ret, mb, mb_len);
67 *mh_ret = mh;
68 return 0;
69}
70
71static int create_rcom_stateless(struct dlm_ls *ls, int to_nodeid, int type,
72 int len, struct dlm_rcom **rc_ret,
73 struct dlm_msg **msg_ret)
74{
75 int mb_len = sizeof(struct dlm_rcom) + len;
76 struct dlm_msg *msg;
77 char *mb;
78
79 msg = dlm_lowcomms_new_msg(to_nodeid, mb_len, GFP_NOFS, &mb,
80 NULL, NULL);
81 if (!msg) {
82 log_print("create_rcom to %d type %d len %d ENOBUFS",
83 to_nodeid, type, len);
84 return -ENOBUFS;
85 }
86
87 _create_rcom(ls, to_nodeid, type, len, rc_ret, mb, mb_len);
88 *msg_ret = msg;
89 return 0;
90}
91
92static void _send_rcom(struct dlm_ls *ls, struct dlm_rcom *rc)
93{
94 dlm_rcom_out(rc);
95}
96
97static void send_rcom(struct dlm_ls *ls, struct dlm_mhandle *mh,
98 struct dlm_rcom *rc)
99{
100 _send_rcom(ls, rc);
101 dlm_midcomms_commit_mhandle(mh);
102}
103
104static void send_rcom_stateless(struct dlm_ls *ls, struct dlm_msg *msg,
105 struct dlm_rcom *rc)
106{
107 _send_rcom(ls, rc);
108 dlm_lowcomms_commit_msg(msg);
109 dlm_lowcomms_put_msg(msg);
110}
111
112static void set_rcom_status(struct dlm_ls *ls, struct rcom_status *rs,
113 uint32_t flags)
114{
115 rs->rs_flags = cpu_to_le32(flags);
116}
117
118/* When replying to a status request, a node also sends back its
119 configuration values. The requesting node then checks that the remote
120 node is configured the same way as itself. */
121
122static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
123 uint32_t num_slots)
124{
125 rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
126 rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
127
128 rf->rf_our_slot = cpu_to_le16(ls->ls_slot);
129 rf->rf_num_slots = cpu_to_le16(num_slots);
130 rf->rf_generation = cpu_to_le32(ls->ls_generation);
131}
132
133static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
134{
135 struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
136
137 if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) {
138 log_error(ls, "version mismatch: %x nodeid %d: %x",
139 DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
140 rc->rc_header.h_version);
141 return -EPROTO;
142 }
143
144 if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
145 le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
146 log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
147 ls->ls_lvblen, ls->ls_exflags, nodeid,
148 le32_to_cpu(rf->rf_lvblen),
149 le32_to_cpu(rf->rf_lsflags));
150 return -EPROTO;
151 }
152 return 0;
153}
154
155static void allow_sync_reply(struct dlm_ls *ls, uint64_t *new_seq)
156{
157 spin_lock(&ls->ls_rcom_spin);
158 *new_seq = ++ls->ls_rcom_seq;
159 set_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
160 spin_unlock(&ls->ls_rcom_spin);
161}
162
163static void disallow_sync_reply(struct dlm_ls *ls)
164{
165 spin_lock(&ls->ls_rcom_spin);
166 clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
167 clear_bit(LSFL_RCOM_READY, &ls->ls_flags);
168 spin_unlock(&ls->ls_rcom_spin);
169}
170
171/*
172 * low nodeid gathers one slot value at a time from each node.
173 * it sets need_slots=0, and saves rf_our_slot returned from each
174 * rcom_config.
175 *
176 * other nodes gather all slot values at once from the low nodeid.
177 * they set need_slots=1, and ignore the rf_our_slot returned from each
178 * rcom_config. they use the rf_num_slots returned from the low
179 * node's rcom_config.
180 */
181
182int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags)
183{
184 struct dlm_rcom *rc;
185 struct dlm_msg *msg;
186 int error = 0;
187
188 ls->ls_recover_nodeid = nodeid;
189
190 if (nodeid == dlm_our_nodeid()) {
191 rc = ls->ls_recover_buf;
192 rc->rc_result = dlm_recover_status(ls);
193 goto out;
194 }
195
196retry:
197 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_STATUS,
198 sizeof(struct rcom_status), &rc, &msg);
199 if (error)
200 goto out;
201
202 set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
203
204 allow_sync_reply(ls, &rc->rc_id);
205 memset(ls->ls_recover_buf, 0, DLM_MAX_SOCKET_BUFSIZE);
206
207 send_rcom_stateless(ls, msg, rc);
208
209 error = dlm_wait_function(ls, &rcom_response);
210 disallow_sync_reply(ls);
211 if (error == -ETIMEDOUT)
212 goto retry;
213 if (error)
214 goto out;
215
216 rc = ls->ls_recover_buf;
217
218 if (rc->rc_result == -ESRCH) {
219 /* we pretend the remote lockspace exists with 0 status */
220 log_debug(ls, "remote node %d not ready", nodeid);
221 rc->rc_result = 0;
222 error = 0;
223 } else {
224 error = check_rcom_config(ls, rc, nodeid);
225 }
226
227 /* the caller looks at rc_result for the remote recovery status */
228 out:
229 return error;
230}
231
232static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in)
233{
234 struct dlm_rcom *rc;
235 struct rcom_status *rs;
236 uint32_t status;
237 int nodeid = rc_in->rc_header.h_nodeid;
238 int len = sizeof(struct rcom_config);
239 struct dlm_msg *msg;
240 int num_slots = 0;
241 int error;
242
243 if (!dlm_slots_version(&rc_in->rc_header)) {
244 status = dlm_recover_status(ls);
245 goto do_create;
246 }
247
248 rs = (struct rcom_status *)rc_in->rc_buf;
249
250 if (!(le32_to_cpu(rs->rs_flags) & DLM_RSF_NEED_SLOTS)) {
251 status = dlm_recover_status(ls);
252 goto do_create;
253 }
254
255 spin_lock(&ls->ls_recover_lock);
256 status = ls->ls_recover_status;
257 num_slots = ls->ls_num_slots;
258 spin_unlock(&ls->ls_recover_lock);
259 len += num_slots * sizeof(struct rcom_slot);
260
261 do_create:
262 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_STATUS_REPLY,
263 len, &rc, &msg);
264 if (error)
265 return;
266
267 rc->rc_id = rc_in->rc_id;
268 rc->rc_seq_reply = rc_in->rc_seq;
269 rc->rc_result = status;
270
271 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, num_slots);
272
273 if (!num_slots)
274 goto do_send;
275
276 spin_lock(&ls->ls_recover_lock);
277 if (ls->ls_num_slots != num_slots) {
278 spin_unlock(&ls->ls_recover_lock);
279 log_debug(ls, "receive_rcom_status num_slots %d to %d",
280 num_slots, ls->ls_num_slots);
281 rc->rc_result = 0;
282 set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, 0);
283 goto do_send;
284 }
285
286 dlm_slots_copy_out(ls, rc);
287 spin_unlock(&ls->ls_recover_lock);
288
289 do_send:
290 send_rcom_stateless(ls, msg, rc);
291}
292
293static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
294{
295 spin_lock(&ls->ls_rcom_spin);
296 if (!test_bit(LSFL_RCOM_WAIT, &ls->ls_flags) ||
297 rc_in->rc_id != ls->ls_rcom_seq) {
298 log_debug(ls, "reject reply %d from %d seq %llx expect %llx",
299 rc_in->rc_type, rc_in->rc_header.h_nodeid,
300 (unsigned long long)rc_in->rc_id,
301 (unsigned long long)ls->ls_rcom_seq);
302 goto out;
303 }
304 memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length);
305 set_bit(LSFL_RCOM_READY, &ls->ls_flags);
306 clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
307 wake_up(&ls->ls_wait_general);
308 out:
309 spin_unlock(&ls->ls_rcom_spin);
310}
311
312int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
313{
314 struct dlm_rcom *rc;
315 struct dlm_msg *msg;
316 int error = 0;
317
318 ls->ls_recover_nodeid = nodeid;
319
320retry:
321 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_NAMES, last_len,
322 &rc, &msg);
323 if (error)
324 goto out;
325 memcpy(rc->rc_buf, last_name, last_len);
326
327 allow_sync_reply(ls, &rc->rc_id);
328 memset(ls->ls_recover_buf, 0, DLM_MAX_SOCKET_BUFSIZE);
329
330 send_rcom_stateless(ls, msg, rc);
331
332 error = dlm_wait_function(ls, &rcom_response);
333 disallow_sync_reply(ls);
334 if (error == -ETIMEDOUT)
335 goto retry;
336 out:
337 return error;
338}
339
340static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in)
341{
342 struct dlm_rcom *rc;
343 int error, inlen, outlen, nodeid;
344 struct dlm_msg *msg;
345
346 nodeid = rc_in->rc_header.h_nodeid;
347 inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
348 outlen = DLM_MAX_APP_BUFSIZE - sizeof(struct dlm_rcom);
349
350 error = create_rcom_stateless(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen,
351 &rc, &msg);
352 if (error)
353 return;
354 rc->rc_id = rc_in->rc_id;
355 rc->rc_seq_reply = rc_in->rc_seq;
356
357 dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
358 nodeid);
359 send_rcom_stateless(ls, msg, rc);
360}
361
362int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
363{
364 struct dlm_rcom *rc;
365 struct dlm_mhandle *mh;
366 struct dlm_ls *ls = r->res_ls;
367 int error;
368
369 error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
370 &rc, &mh);
371 if (error)
372 goto out;
373 memcpy(rc->rc_buf, r->res_name, r->res_length);
374 rc->rc_id = (unsigned long) r->res_id;
375
376 send_rcom(ls, mh, rc);
377 out:
378 return error;
379}
380
381static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in)
382{
383 struct dlm_rcom *rc;
384 struct dlm_mhandle *mh;
385 int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid;
386 int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
387
388 /* Old code would send this special id to trigger a debug dump. */
389 if (rc_in->rc_id == 0xFFFFFFFF) {
390 log_error(ls, "receive_rcom_lookup dump from %d", nodeid);
391 dlm_dump_rsb_name(ls, rc_in->rc_buf, len);
392 return;
393 }
394
395 error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh);
396 if (error)
397 return;
398
399 error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len,
400 DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL);
401 if (error)
402 ret_nodeid = error;
403 rc->rc_result = ret_nodeid;
404 rc->rc_id = rc_in->rc_id;
405 rc->rc_seq_reply = rc_in->rc_seq;
406
407 send_rcom(ls, mh, rc);
408}
409
410static void receive_rcom_lookup_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
411{
412 dlm_recover_master_reply(ls, rc_in);
413}
414
415static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
416 struct rcom_lock *rl)
417{
418 memset(rl, 0, sizeof(*rl));
419
420 rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
421 rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
422 rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
423 rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
424 rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
425 rl->rl_rqmode = lkb->lkb_rqmode;
426 rl->rl_grmode = lkb->lkb_grmode;
427 rl->rl_status = lkb->lkb_status;
428 rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
429
430 if (lkb->lkb_bastfn)
431 rl->rl_asts |= DLM_CB_BAST;
432 if (lkb->lkb_astfn)
433 rl->rl_asts |= DLM_CB_CAST;
434
435 rl->rl_namelen = cpu_to_le16(r->res_length);
436 memcpy(rl->rl_name, r->res_name, r->res_length);
437
438 /* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
439 If so, receive_rcom_lock_args() won't take this copy. */
440
441 if (lkb->lkb_lvbptr)
442 memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
443}
444
445int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
446{
447 struct dlm_ls *ls = r->res_ls;
448 struct dlm_rcom *rc;
449 struct dlm_mhandle *mh;
450 struct rcom_lock *rl;
451 int error, len = sizeof(struct rcom_lock);
452
453 if (lkb->lkb_lvbptr)
454 len += ls->ls_lvblen;
455
456 error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh);
457 if (error)
458 goto out;
459
460 rl = (struct rcom_lock *) rc->rc_buf;
461 pack_rcom_lock(r, lkb, rl);
462 rc->rc_id = (unsigned long) r;
463
464 send_rcom(ls, mh, rc);
465 out:
466 return error;
467}
468
469/* needs at least dlm_rcom + rcom_lock */
470static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
471{
472 struct dlm_rcom *rc;
473 struct dlm_mhandle *mh;
474 int error, nodeid = rc_in->rc_header.h_nodeid;
475
476 dlm_recover_master_copy(ls, rc_in);
477
478 error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
479 sizeof(struct rcom_lock), &rc, &mh);
480 if (error)
481 return;
482
483 /* We send back the same rcom_lock struct we received, but
484 dlm_recover_master_copy() has filled in rl_remid and rl_result */
485
486 memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
487 rc->rc_id = rc_in->rc_id;
488 rc->rc_seq_reply = rc_in->rc_seq;
489
490 send_rcom(ls, mh, rc);
491}
492
493/* If the lockspace doesn't exist then still send a status message
494 back; it's possible that it just doesn't have its global_id yet. */
495
496int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
497{
498 struct dlm_rcom *rc;
499 struct rcom_config *rf;
500 struct dlm_mhandle *mh;
501 char *mb;
502 int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
503
504 mh = dlm_midcomms_get_mhandle(nodeid, mb_len, GFP_NOFS, &mb);
505 if (!mh)
506 return -ENOBUFS;
507
508 rc = (struct dlm_rcom *) mb;
509
510 rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
511 rc->rc_header.u.h_lockspace = rc_in->rc_header.u.h_lockspace;
512 rc->rc_header.h_nodeid = dlm_our_nodeid();
513 rc->rc_header.h_length = mb_len;
514 rc->rc_header.h_cmd = DLM_RCOM;
515
516 rc->rc_type = DLM_RCOM_STATUS_REPLY;
517 rc->rc_id = rc_in->rc_id;
518 rc->rc_seq_reply = rc_in->rc_seq;
519 rc->rc_result = -ESRCH;
520
521 rf = (struct rcom_config *) rc->rc_buf;
522 rf->rf_lvblen = cpu_to_le32(~0U);
523
524 dlm_rcom_out(rc);
525 dlm_midcomms_commit_mhandle(mh);
526
527 return 0;
528}
529
530/*
531 * Ignore messages for stage Y before we set
532 * recover_status bit for stage X:
533 *
534 * recover_status = 0
535 *
536 * dlm_recover_members()
537 * - send nothing
538 * - recv nothing
539 * - ignore NAMES, NAMES_REPLY
540 * - ignore LOOKUP, LOOKUP_REPLY
541 * - ignore LOCK, LOCK_REPLY
542 *
543 * recover_status |= NODES
544 *
545 * dlm_recover_members_wait()
546 *
547 * dlm_recover_directory()
548 * - send NAMES
549 * - recv NAMES_REPLY
550 * - ignore LOOKUP, LOOKUP_REPLY
551 * - ignore LOCK, LOCK_REPLY
552 *
553 * recover_status |= DIR
554 *
555 * dlm_recover_directory_wait()
556 *
557 * dlm_recover_masters()
558 * - send LOOKUP
559 * - recv LOOKUP_REPLY
560 *
561 * dlm_recover_locks()
562 * - send LOCKS
563 * - recv LOCKS_REPLY
564 *
565 * recover_status |= LOCKS
566 *
567 * dlm_recover_locks_wait()
568 *
569 * recover_status |= DONE
570 */
571
572/* Called by dlm_recv; corresponds to dlm_receive_message() but special
573 recovery-only comms are sent through here. */
574
575void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
576{
577 int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
578 int stop, reply = 0, names = 0, lookup = 0, lock = 0;
579 uint32_t status;
580 uint64_t seq;
581
582 switch (rc->rc_type) {
583 case DLM_RCOM_STATUS_REPLY:
584 reply = 1;
585 break;
586 case DLM_RCOM_NAMES:
587 names = 1;
588 break;
589 case DLM_RCOM_NAMES_REPLY:
590 names = 1;
591 reply = 1;
592 break;
593 case DLM_RCOM_LOOKUP:
594 lookup = 1;
595 break;
596 case DLM_RCOM_LOOKUP_REPLY:
597 lookup = 1;
598 reply = 1;
599 break;
600 case DLM_RCOM_LOCK:
601 lock = 1;
602 break;
603 case DLM_RCOM_LOCK_REPLY:
604 lock = 1;
605 reply = 1;
606 break;
607 }
608
609 spin_lock(&ls->ls_recover_lock);
610 status = ls->ls_recover_status;
611 stop = test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
612 seq = ls->ls_recover_seq;
613 spin_unlock(&ls->ls_recover_lock);
614
615 if (stop && (rc->rc_type != DLM_RCOM_STATUS))
616 goto ignore;
617
618 if (reply && (rc->rc_seq_reply != seq))
619 goto ignore;
620
621 if (!(status & DLM_RS_NODES) && (names || lookup || lock))
622 goto ignore;
623
624 if (!(status & DLM_RS_DIR) && (lookup || lock))
625 goto ignore;
626
627 switch (rc->rc_type) {
628 case DLM_RCOM_STATUS:
629 receive_rcom_status(ls, rc);
630 break;
631
632 case DLM_RCOM_NAMES:
633 receive_rcom_names(ls, rc);
634 break;
635
636 case DLM_RCOM_LOOKUP:
637 receive_rcom_lookup(ls, rc);
638 break;
639
640 case DLM_RCOM_LOCK:
641 if (rc->rc_header.h_length < lock_size)
642 goto Eshort;
643 receive_rcom_lock(ls, rc);
644 break;
645
646 case DLM_RCOM_STATUS_REPLY:
647 receive_sync_reply(ls, rc);
648 break;
649
650 case DLM_RCOM_NAMES_REPLY:
651 receive_sync_reply(ls, rc);
652 break;
653
654 case DLM_RCOM_LOOKUP_REPLY:
655 receive_rcom_lookup_reply(ls, rc);
656 break;
657
658 case DLM_RCOM_LOCK_REPLY:
659 if (rc->rc_header.h_length < lock_size)
660 goto Eshort;
661 dlm_recover_process_copy(ls, rc);
662 break;
663
664 default:
665 log_error(ls, "receive_rcom bad type %d", rc->rc_type);
666 }
667 return;
668
669ignore:
670 log_limit(ls, "dlm_receive_rcom ignore msg %d "
671 "from %d %llu %llu recover seq %llu sts %x gen %u",
672 rc->rc_type,
673 nodeid,
674 (unsigned long long)rc->rc_seq,
675 (unsigned long long)rc->rc_seq_reply,
676 (unsigned long long)seq,
677 status, ls->ls_generation);
678 return;
679Eshort:
680 log_error(ls, "recovery message %d from %d is too short",
681 rc->rc_type, nodeid);
682}
683