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MIPS: Fix LLVM build issue.
[linux-2.6-block.git] / fs / dlm / rcom.c
CommitLineData
e7fd4179
DT		 1/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
dbcfc347 5** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
e7fd4179
DT		 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"
e7fd4179
DT		 26
27static int rcom_response(struct dlm_ls *ls)
28{
29 return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
30}
31
32static 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
573c24c4 40 mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_NOFS, &mb);
e7fd4179
DT		 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
38aa8b0c
DT		 58 spin_lock(&ls->ls_recover_lock);
59 rc->rc_seq = ls->ls_recover_seq;
60 spin_unlock(&ls->ls_recover_lock);
61
e7fd4179
DT		 62 *mh_ret = mh;
63 *rc_ret = rc;
64 return 0;
65}
66
67static 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
757a4271
DT		 74static 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
e7fd4179
DT		 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
757a4271
DT		 84static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
85 uint32_t num_slots)
e7fd4179 86{
93ff2971
AV		 87 rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
88 rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
757a4271
DT		 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);
e7fd4179
DT		 93}
94
757a4271 95static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
e7fd4179 96{
9e971b71
DT		 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);
8b0e7b2c 103 return -EPROTO;
9e971b71
DT		 104 }
105
93ff2971
AV		 106 if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
107 le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
e7fd4179 108 log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
93ff2971
AV		 109 ls->ls_lvblen, ls->ls_exflags, nodeid,
110 le32_to_cpu(rf->rf_lvblen),
111 le32_to_cpu(rf->rf_lsflags));
8b0e7b2c 112 return -EPROTO;
e7fd4179
DT		 113 }
114 return 0;
115}
116
98f176fb
DT		 117static 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
125static 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
757a4271
DT		 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
144int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags)
e7fd4179
DT		 145{
146 struct dlm_rcom *rc;
147 struct dlm_mhandle *mh;
148 int error = 0;
149
faa0f267 150 ls->ls_recover_nodeid = nodeid;
e7fd4179
DT		 151
152 if (nodeid == dlm_our_nodeid()) {
4007685c 153 rc = ls->ls_recover_buf;
e7fd4179
DT		 154 rc->rc_result = dlm_recover_status(ls);
155 goto out;
156 }
157
757a4271
DT		 158 error = create_rcom(ls, nodeid, DLM_RCOM_STATUS,
159 sizeof(struct rcom_status), &rc, &mh);
e7fd4179
DT		 160 if (error)
161 goto out;
98f176fb 162
757a4271
DT		 163 set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
164
98f176fb 165 allow_sync_reply(ls, &rc->rc_id);
68c817a1 166 memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
e7fd4179
DT		 167
168 send_rcom(ls, mh, rc);
169
170 error = dlm_wait_function(ls, &rcom_response);
98f176fb 171 disallow_sync_reply(ls);
e7fd4179
DT		 172 if (error)
173 goto out;
174
4007685c 175 rc = ls->ls_recover_buf;
e7fd4179
DT		 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;
757a4271
DT		 181 error = 0;
182 } else {
183 error = check_rcom_config(ls, rc, nodeid);
184 }
185
e7fd4179
DT		 186 /* the caller looks at rc_result for the remote recovery status */
187 out:
188 return error;
189}
190
191static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in)
192{
193 struct dlm_rcom *rc;
194 struct dlm_mhandle *mh;
757a4271
DT		 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;
e7fd4179 208
c07127b4 209 if (!(le32_to_cpu(rs->rs_flags) & DLM_RSF_NEED_SLOTS)) {
757a4271
DT		 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:
e7fd4179 221 error = create_rcom(ls, nodeid, DLM_RCOM_STATUS_REPLY,
757a4271 222 len, &rc, &mh);
e7fd4179
DT		 223 if (error)
224 return;
757a4271 225
4a99c3d9 226 rc->rc_id = rc_in->rc_id;
38aa8b0c 227 rc->rc_seq_reply = rc_in->rc_seq;
757a4271
DT		 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);
e7fd4179 247
757a4271 248 do_send:
e7fd4179
DT		 249 send_rcom(ls, mh, rc);
250}
251
4a99c3d9 252static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
e7fd4179 253{
98f176fb
DT		 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,
57adf7ee
RK		 259 (unsigned long long)rc_in->rc_id,
260 (unsigned long long)ls->ls_rcom_seq);
98f176fb 261 goto out;
4a99c3d9 262 }
e7fd4179
DT		 263 memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length);
264 set_bit(LSFL_RCOM_READY, &ls->ls_flags);
98f176fb 265 clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
e7fd4179 266 wake_up(&ls->ls_wait_general);
98f176fb
DT		 267 out:
268 spin_unlock(&ls->ls_rcom_spin);
e7fd4179
DT		 269}
270
271int 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;
4007685c 275 int error = 0;
e7fd4179 276
faa0f267 277 ls->ls_recover_nodeid = nodeid;
e7fd4179 278
e7fd4179
DT		 279 error = create_rcom(ls, nodeid, DLM_RCOM_NAMES, last_len, &rc, &mh);
280 if (error)
281 goto out;
282 memcpy(rc->rc_buf, last_name, last_len);
98f176fb
DT		 283
284 allow_sync_reply(ls, &rc->rc_id);
68c817a1 285 memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
e7fd4179
DT		 286
287 send_rcom(ls, mh, rc);
288
289 error = dlm_wait_function(ls, &rcom_response);
98f176fb 290 disallow_sync_reply(ls);
e7fd4179
DT		 291 out:
292 return error;
293}
294
295static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in)
296{
297 struct dlm_rcom *rc;
298 struct dlm_mhandle *mh;
38aa8b0c 299 int error, inlen, outlen, nodeid;
e7fd4179
DT		 300
301 nodeid = rc_in->rc_header.h_nodeid;
302 inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
68c817a1 303 outlen = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom);
e7fd4179
DT		 304
305 error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh);
306 if (error)
307 return;
4a99c3d9 308 rc->rc_id = rc_in->rc_id;
38aa8b0c 309 rc->rc_seq_reply = rc_in->rc_seq;
e7fd4179
DT		 310
311 dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
312 nodeid);
313 send_rcom(ls, mh, rc);
314}
315
e7fd4179
DT		 316int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
317{
318 struct dlm_rcom *rc;
319 struct dlm_mhandle *mh;
320 struct dlm_ls *ls = r->res_ls;
321 int error;
322
323 error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
324 &rc, &mh);
325 if (error)
326 goto out;
327 memcpy(rc->rc_buf, r->res_name, r->res_length);
1d7c484e 328 rc->rc_id = (unsigned long) r->res_id;
e7fd4179
DT		 329
330 send_rcom(ls, mh, rc);
331 out:
332 return error;
333}
334
c04fecb4
DT		 335int dlm_send_rcom_lookup_dump(struct dlm_rsb *r, int to_nodeid)
336{
337 struct dlm_rcom *rc;
338 struct dlm_mhandle *mh;
339 struct dlm_ls *ls = r->res_ls;
340 int error;
341
342 error = create_rcom(ls, to_nodeid, DLM_RCOM_LOOKUP, r->res_length,
343 &rc, &mh);
344 if (error)
345 goto out;
346 memcpy(rc->rc_buf, r->res_name, r->res_length);
347 rc->rc_id = 0xFFFFFFFF;
348
349 send_rcom(ls, mh, rc);
350 out:
351 return error;
352}
353
e7fd4179
DT		 354static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in)
355{
356 struct dlm_rcom *rc;
357 struct dlm_mhandle *mh;
358 int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid;
359 int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
360
361 error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh);
362 if (error)
363 return;
364
c04fecb4
DT		 365 if (rc_in->rc_id == 0xFFFFFFFF) {
366 log_error(ls, "receive_rcom_lookup dump from %d", nodeid);
367 dlm_dump_rsb_name(ls, rc_in->rc_buf, len);
368 return;
369 }
370
371 error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len,
372 DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL);
e7fd4179
DT		 373 if (error)
374 ret_nodeid = error;
375 rc->rc_result = ret_nodeid;
376 rc->rc_id = rc_in->rc_id;
38aa8b0c 377 rc->rc_seq_reply = rc_in->rc_seq;
e7fd4179
DT		 378
379 send_rcom(ls, mh, rc);
380}
381
382static void receive_rcom_lookup_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
383{
384 dlm_recover_master_reply(ls, rc_in);
385}
386
387static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
388 struct rcom_lock *rl)
389{
390 memset(rl, 0, sizeof(*rl));
391
163a1859
AV		 392 rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
393 rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
394 rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
395 rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
396 rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
e7fd4179
DT		 397 rl->rl_rqmode = lkb->lkb_rqmode;
398 rl->rl_grmode = lkb->lkb_grmode;
399 rl->rl_status = lkb->lkb_status;
163a1859 400 rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
e7fd4179 401
e5dae548 402 if (lkb->lkb_bastfn)
8304d6f2 403 rl->rl_asts |= DLM_CB_BAST;
e5dae548 404 if (lkb->lkb_astfn)
8304d6f2 405 rl->rl_asts |= DLM_CB_CAST;
e7fd4179 406
163a1859 407 rl->rl_namelen = cpu_to_le16(r->res_length);
e7fd4179
DT		 408 memcpy(rl->rl_name, r->res_name, r->res_length);
409
410 /* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
411 If so, receive_rcom_lock_args() won't take this copy. */
412
413 if (lkb->lkb_lvbptr)
414 memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
415}
416
417int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
418{
419 struct dlm_ls *ls = r->res_ls;
420 struct dlm_rcom *rc;
421 struct dlm_mhandle *mh;
422 struct rcom_lock *rl;
423 int error, len = sizeof(struct rcom_lock);
424
425 if (lkb->lkb_lvbptr)
426 len += ls->ls_lvblen;
427
428 error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh);
429 if (error)
430 goto out;
431
432 rl = (struct rcom_lock *) rc->rc_buf;
433 pack_rcom_lock(r, lkb, rl);
434 rc->rc_id = (unsigned long) r;
435
436 send_rcom(ls, mh, rc);
437 out:
438 return error;
439}
440
ae773d0b 441/* needs at least dlm_rcom + rcom_lock */
e7fd4179
DT		 442static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
443{
444 struct dlm_rcom *rc;
445 struct dlm_mhandle *mh;
446 int error, nodeid = rc_in->rc_header.h_nodeid;
447
448 dlm_recover_master_copy(ls, rc_in);
449
450 error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
451 sizeof(struct rcom_lock), &rc, &mh);
452 if (error)
453 return;
454
455 /* We send back the same rcom_lock struct we received, but
456 dlm_recover_master_copy() has filled in rl_remid and rl_result */
457
458 memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
459 rc->rc_id = rc_in->rc_id;
38aa8b0c 460 rc->rc_seq_reply = rc_in->rc_seq;
e7fd4179
DT		 461
462 send_rcom(ls, mh, rc);
463}
464
c36258b5
DT		 465/* If the lockspace doesn't exist then still send a status message
466 back; it's possible that it just doesn't have its global_id yet. */
467
468int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
e7fd4179
DT		 469{
470 struct dlm_rcom *rc;
1babdb45 471 struct rcom_config *rf;
e7fd4179
DT		 472 struct dlm_mhandle *mh;
473 char *mb;
1babdb45 474 int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
e7fd4179 475
41684f95 476 mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_NOFS, &mb);
e7fd4179
DT		 477 if (!mh)
478 return -ENOBUFS;
479 memset(mb, 0, mb_len);
480
481 rc = (struct dlm_rcom *) mb;
482
483 rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
484 rc->rc_header.h_lockspace = rc_in->rc_header.h_lockspace;
485 rc->rc_header.h_nodeid = dlm_our_nodeid();
486 rc->rc_header.h_length = mb_len;
487 rc->rc_header.h_cmd = DLM_RCOM;
488
489 rc->rc_type = DLM_RCOM_STATUS_REPLY;
f5888750 490 rc->rc_id = rc_in->rc_id;
38aa8b0c 491 rc->rc_seq_reply = rc_in->rc_seq;
e7fd4179
DT		 492 rc->rc_result = -ESRCH;
493
1babdb45 494 rf = (struct rcom_config *) rc->rc_buf;
93ff2971 495 rf->rf_lvblen = cpu_to_le32(~0U);
1babdb45 496
e7fd4179
DT		 497 dlm_rcom_out(rc);
498 dlm_lowcomms_commit_buffer(mh);
499
500 return 0;
501}
502
c04fecb4
DT		 503/*
504 * Ignore messages for stage Y before we set
505 * recover_status bit for stage X:
506 *
507 * recover_status = 0
508 *
509 * dlm_recover_members()
510 * - send nothing
511 * - recv nothing
512 * - ignore NAMES, NAMES_REPLY
513 * - ignore LOOKUP, LOOKUP_REPLY
514 * - ignore LOCK, LOCK_REPLY
515 *
516 * recover_status |= NODES
517 *
518 * dlm_recover_members_wait()
519 *
520 * dlm_recover_directory()
521 * - send NAMES
522 * - recv NAMES_REPLY
523 * - ignore LOOKUP, LOOKUP_REPLY
524 * - ignore LOCK, LOCK_REPLY
525 *
526 * recover_status |= DIR
527 *
528 * dlm_recover_directory_wait()
529 *
530 * dlm_recover_masters()
531 * - send LOOKUP
532 * - recv LOOKUP_REPLY
533 *
534 * dlm_recover_locks()
535 * - send LOCKS
536 * - recv LOCKS_REPLY
537 *
538 * recover_status |= LOCKS
539 *
540 * dlm_recover_locks_wait()
541 *
542 * recover_status |= DONE
543 */
544
d6e24788
DT		 545/* Called by dlm_recv; corresponds to dlm_receive_message() but special
546 recovery-only comms are sent through here. */
547
548void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
38aa8b0c 549{
d6e24788 550 int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
c04fecb4 551 int stop, reply = 0, names = 0, lookup = 0, lock = 0;
4875647a 552 uint32_t status;
38aa8b0c 553 uint64_t seq;
38aa8b0c
DT		 554
555 switch (rc->rc_type) {
c04fecb4
DT		 556 case DLM_RCOM_STATUS_REPLY:
557 reply = 1;
558 break;
559 case DLM_RCOM_NAMES:
560 names = 1;
561 break;
562 case DLM_RCOM_NAMES_REPLY:
563 names = 1;
564 reply = 1;
565 break;
566 case DLM_RCOM_LOOKUP:
567 lookup = 1;
568 break;
569 case DLM_RCOM_LOOKUP_REPLY:
570 lookup = 1;
571 reply = 1;
572 break;
4875647a
DT		 573 case DLM_RCOM_LOCK:
574 lock = 1;
575 break;
576 case DLM_RCOM_LOCK_REPLY:
577 lock = 1;
578 reply = 1;
579 break;
d6e24788 580 };
38aa8b0c 581
d6e24788 582 spin_lock(&ls->ls_recover_lock);
4875647a 583 status = ls->ls_recover_status;
475f230c 584 stop = test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
d6e24788
DT		 585 seq = ls->ls_recover_seq;
586 spin_unlock(&ls->ls_recover_lock);
ae773d0b 587
c04fecb4
DT		 588 if (stop && (rc->rc_type != DLM_RCOM_STATUS))
589 goto ignore;
590
591 if (reply && (rc->rc_seq_reply != seq))
592 goto ignore;
593
594 if (!(status & DLM_RS_NODES) && (names || lookup || lock))
595 goto ignore;
596
597 if (!(status & DLM_RS_DIR) && (lookup || lock))
598 goto ignore;
e7fd4179 599
e7fd4179
DT		 600 switch (rc->rc_type) {
601 case DLM_RCOM_STATUS:
602 receive_rcom_status(ls, rc);
603 break;
604
605 case DLM_RCOM_NAMES:
606 receive_rcom_names(ls, rc);
607 break;
608
609 case DLM_RCOM_LOOKUP:
610 receive_rcom_lookup(ls, rc);
611 break;
612
613 case DLM_RCOM_LOCK:
ae773d0b
AV		 614 if (rc->rc_header.h_length < lock_size)
615 goto Eshort;
e7fd4179
DT		 616 receive_rcom_lock(ls, rc);
617 break;
618
619 case DLM_RCOM_STATUS_REPLY:
dbcfc347 620 receive_sync_reply(ls, rc);
e7fd4179
DT		 621 break;
622
623 case DLM_RCOM_NAMES_REPLY:
dbcfc347 624 receive_sync_reply(ls, rc);
e7fd4179
DT		 625 break;
626
627 case DLM_RCOM_LOOKUP_REPLY:
628 receive_rcom_lookup_reply(ls, rc);
629 break;
630
631 case DLM_RCOM_LOCK_REPLY:
ae773d0b
AV		 632 if (rc->rc_header.h_length < lock_size)
633 goto Eshort;
dbcfc347 634 dlm_recover_process_copy(ls, rc);
e7fd4179
DT		 635 break;
636
637 default:
dbcfc347 638 log_error(ls, "receive_rcom bad type %d", rc->rc_type);
e7fd4179 639 }
c04fecb4
DT		 640 return;
641
642ignore:
643 log_limit(ls, "dlm_receive_rcom ignore msg %d "
644 "from %d %llu %llu recover seq %llu sts %x gen %u",
645 rc->rc_type,
646 nodeid,
647 (unsigned long long)rc->rc_seq,
648 (unsigned long long)rc->rc_seq_reply,
649 (unsigned long long)seq,
650 status, ls->ls_generation);
c36258b5 651 return;
ae773d0b 652Eshort:
c04fecb4
DT		 653 log_error(ls, "recovery message %d from %d is too short",
654 rc->rc_type, nodeid);
e7fd4179
DT		 655}
656
Linux 6.x block layer and io_uring tree(s)