Commit | Line | Data |
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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" | |
757a4271 | 26 | #include "member.h" |
e7fd4179 DT |
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 | ||
573c24c4 | 42 | mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_NOFS, &mb); |
e7fd4179 DT |
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 | ||
38aa8b0c DT |
60 | spin_lock(&ls->ls_recover_lock); |
61 | rc->rc_seq = ls->ls_recover_seq; | |
62 | spin_unlock(&ls->ls_recover_lock); | |
63 | ||
e7fd4179 DT |
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 | ||
757a4271 DT |
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 | ||
e7fd4179 DT |
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 | ||
757a4271 DT |
86 | static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf, |
87 | uint32_t num_slots) | |
e7fd4179 | 88 | { |
93ff2971 AV |
89 | rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen); |
90 | rf->rf_lsflags = cpu_to_le32(ls->ls_exflags); | |
757a4271 DT |
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); | |
e7fd4179 DT |
95 | } |
96 | ||
757a4271 | 97 | static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid) |
e7fd4179 | 98 | { |
9e971b71 DT |
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); | |
8b0e7b2c | 105 | return -EPROTO; |
9e971b71 DT |
106 | } |
107 | ||
93ff2971 AV |
108 | if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen || |
109 | le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) { | |
e7fd4179 | 110 | log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x", |
93ff2971 AV |
111 | ls->ls_lvblen, ls->ls_exflags, nodeid, |
112 | le32_to_cpu(rf->rf_lvblen), | |
113 | le32_to_cpu(rf->rf_lsflags)); | |
8b0e7b2c | 114 | return -EPROTO; |
e7fd4179 DT |
115 | } |
116 | return 0; | |
117 | } | |
118 | ||
98f176fb DT |
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 | ||
757a4271 DT |
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) | |
e7fd4179 DT |
147 | { |
148 | struct dlm_rcom *rc; | |
149 | struct dlm_mhandle *mh; | |
150 | int error = 0; | |
151 | ||
faa0f267 | 152 | ls->ls_recover_nodeid = nodeid; |
e7fd4179 DT |
153 | |
154 | if (nodeid == dlm_our_nodeid()) { | |
4007685c | 155 | rc = ls->ls_recover_buf; |
e7fd4179 DT |
156 | rc->rc_result = dlm_recover_status(ls); |
157 | goto out; | |
158 | } | |
159 | ||
757a4271 DT |
160 | error = create_rcom(ls, nodeid, DLM_RCOM_STATUS, |
161 | sizeof(struct rcom_status), &rc, &mh); | |
e7fd4179 DT |
162 | if (error) |
163 | goto out; | |
98f176fb | 164 | |
757a4271 DT |
165 | set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags); |
166 | ||
98f176fb | 167 | allow_sync_reply(ls, &rc->rc_id); |
68c817a1 | 168 | memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size); |
e7fd4179 DT |
169 | |
170 | send_rcom(ls, mh, rc); | |
171 | ||
172 | error = dlm_wait_function(ls, &rcom_response); | |
98f176fb | 173 | disallow_sync_reply(ls); |
e7fd4179 DT |
174 | if (error) |
175 | goto out; | |
176 | ||
4007685c | 177 | rc = ls->ls_recover_buf; |
e7fd4179 DT |
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; | |
757a4271 DT |
183 | error = 0; |
184 | } else { | |
185 | error = check_rcom_config(ls, rc, nodeid); | |
186 | } | |
187 | ||
e7fd4179 DT |
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; | |
757a4271 DT |
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; | |
e7fd4179 | 210 | |
757a4271 DT |
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: | |
e7fd4179 | 223 | error = create_rcom(ls, nodeid, DLM_RCOM_STATUS_REPLY, |
757a4271 | 224 | len, &rc, &mh); |
e7fd4179 DT |
225 | if (error) |
226 | return; | |
757a4271 | 227 | |
4a99c3d9 | 228 | rc->rc_id = rc_in->rc_id; |
38aa8b0c | 229 | rc->rc_seq_reply = rc_in->rc_seq; |
757a4271 DT |
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); | |
e7fd4179 | 249 | |
757a4271 | 250 | do_send: |
e7fd4179 DT |
251 | send_rcom(ls, mh, rc); |
252 | } | |
253 | ||
4a99c3d9 | 254 | static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in) |
e7fd4179 | 255 | { |
98f176fb DT |
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, | |
57adf7ee RK |
261 | (unsigned long long)rc_in->rc_id, |
262 | (unsigned long long)ls->ls_rcom_seq); | |
98f176fb | 263 | goto out; |
4a99c3d9 | 264 | } |
e7fd4179 DT |
265 | memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length); |
266 | set_bit(LSFL_RCOM_READY, &ls->ls_flags); | |
98f176fb | 267 | clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags); |
e7fd4179 | 268 | wake_up(&ls->ls_wait_general); |
98f176fb DT |
269 | out: |
270 | spin_unlock(&ls->ls_rcom_spin); | |
e7fd4179 DT |
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; | |
4007685c AV |
277 | int error = 0; |
278 | int max_size = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom); | |
e7fd4179 | 279 | |
faa0f267 | 280 | ls->ls_recover_nodeid = nodeid; |
e7fd4179 DT |
281 | |
282 | if (nodeid == dlm_our_nodeid()) { | |
599e0f58 DT |
283 | ls->ls_recover_buf->rc_header.h_length = |
284 | dlm_config.ci_buffer_size; | |
e7fd4179 | 285 | dlm_copy_master_names(ls, last_name, last_len, |
4007685c AV |
286 | ls->ls_recover_buf->rc_buf, |
287 | max_size, nodeid); | |
e7fd4179 DT |
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); | |
98f176fb DT |
295 | |
296 | allow_sync_reply(ls, &rc->rc_id); | |
68c817a1 | 297 | memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size); |
e7fd4179 DT |
298 | |
299 | send_rcom(ls, mh, rc); | |
300 | ||
301 | error = dlm_wait_function(ls, &rcom_response); | |
98f176fb | 302 | disallow_sync_reply(ls); |
e7fd4179 DT |
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; | |
38aa8b0c | 311 | int error, inlen, outlen, nodeid; |
e7fd4179 DT |
312 | |
313 | nodeid = rc_in->rc_header.h_nodeid; | |
314 | inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom); | |
68c817a1 | 315 | outlen = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom); |
e7fd4179 DT |
316 | |
317 | error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh); | |
318 | if (error) | |
319 | return; | |
4a99c3d9 | 320 | rc->rc_id = rc_in->rc_id; |
38aa8b0c | 321 | rc->rc_seq_reply = rc_in->rc_seq; |
e7fd4179 DT |
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 | ||
e7fd4179 DT |
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; | |
38aa8b0c | 363 | rc->rc_seq_reply = rc_in->rc_seq; |
e7fd4179 DT |
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 | ||
163a1859 AV |
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); | |
e7fd4179 DT |
383 | rl->rl_rqmode = lkb->lkb_rqmode; |
384 | rl->rl_grmode = lkb->lkb_grmode; | |
385 | rl->rl_status = lkb->lkb_status; | |
163a1859 | 386 | rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type); |
e7fd4179 | 387 | |
e5dae548 | 388 | if (lkb->lkb_bastfn) |
8304d6f2 | 389 | rl->rl_asts |= DLM_CB_BAST; |
e5dae548 | 390 | if (lkb->lkb_astfn) |
8304d6f2 | 391 | rl->rl_asts |= DLM_CB_CAST; |
e7fd4179 | 392 | |
163a1859 | 393 | rl->rl_namelen = cpu_to_le16(r->res_length); |
e7fd4179 DT |
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 | ||
ae773d0b | 427 | /* needs at least dlm_rcom + rcom_lock */ |
e7fd4179 DT |
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; | |
38aa8b0c | 446 | rc->rc_seq_reply = rc_in->rc_seq; |
e7fd4179 DT |
447 | |
448 | send_rcom(ls, mh, rc); | |
449 | } | |
450 | ||
c36258b5 DT |
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) | |
e7fd4179 DT |
455 | { |
456 | struct dlm_rcom *rc; | |
1babdb45 | 457 | struct rcom_config *rf; |
e7fd4179 DT |
458 | struct dlm_mhandle *mh; |
459 | char *mb; | |
1babdb45 | 460 | int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config); |
e7fd4179 | 461 | |
41684f95 | 462 | mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_NOFS, &mb); |
e7fd4179 DT |
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; | |
f5888750 | 476 | rc->rc_id = rc_in->rc_id; |
38aa8b0c | 477 | rc->rc_seq_reply = rc_in->rc_seq; |
e7fd4179 DT |
478 | rc->rc_result = -ESRCH; |
479 | ||
1babdb45 | 480 | rf = (struct rcom_config *) rc->rc_buf; |
93ff2971 | 481 | rf->rf_lvblen = cpu_to_le32(~0U); |
1babdb45 | 482 | |
e7fd4179 DT |
483 | dlm_rcom_out(rc); |
484 | dlm_lowcomms_commit_buffer(mh); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
d6e24788 DT |
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) | |
38aa8b0c | 493 | { |
d6e24788 DT |
494 | int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock); |
495 | int stop, reply = 0; | |
38aa8b0c | 496 | uint64_t seq; |
38aa8b0c DT |
497 | |
498 | switch (rc->rc_type) { | |
499 | case DLM_RCOM_STATUS_REPLY: | |
500 | case DLM_RCOM_NAMES_REPLY: | |
501 | case DLM_RCOM_LOOKUP_REPLY: | |
502 | case DLM_RCOM_LOCK_REPLY: | |
d6e24788 DT |
503 | reply = 1; |
504 | }; | |
38aa8b0c | 505 | |
d6e24788 DT |
506 | spin_lock(&ls->ls_recover_lock); |
507 | stop = test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); | |
508 | seq = ls->ls_recover_seq; | |
509 | spin_unlock(&ls->ls_recover_lock); | |
ae773d0b | 510 | |
d6e24788 DT |
511 | if ((stop && (rc->rc_type != DLM_RCOM_STATUS)) || |
512 | (reply && (rc->rc_seq_reply != seq))) { | |
513 | log_limit(ls, "dlm_receive_rcom ignore msg %d " | |
514 | "from %d %llu %llu seq %llu", | |
515 | rc->rc_type, nodeid, | |
516 | (unsigned long long)rc->rc_seq, | |
517 | (unsigned long long)rc->rc_seq_reply, | |
518 | (unsigned long long)seq); | |
e7fd4179 DT |
519 | goto out; |
520 | } | |
521 | ||
e7fd4179 DT |
522 | switch (rc->rc_type) { |
523 | case DLM_RCOM_STATUS: | |
524 | receive_rcom_status(ls, rc); | |
525 | break; | |
526 | ||
527 | case DLM_RCOM_NAMES: | |
528 | receive_rcom_names(ls, rc); | |
529 | break; | |
530 | ||
531 | case DLM_RCOM_LOOKUP: | |
532 | receive_rcom_lookup(ls, rc); | |
533 | break; | |
534 | ||
535 | case DLM_RCOM_LOCK: | |
ae773d0b AV |
536 | if (rc->rc_header.h_length < lock_size) |
537 | goto Eshort; | |
e7fd4179 DT |
538 | receive_rcom_lock(ls, rc); |
539 | break; | |
540 | ||
541 | case DLM_RCOM_STATUS_REPLY: | |
dbcfc347 | 542 | receive_sync_reply(ls, rc); |
e7fd4179 DT |
543 | break; |
544 | ||
545 | case DLM_RCOM_NAMES_REPLY: | |
dbcfc347 | 546 | receive_sync_reply(ls, rc); |
e7fd4179 DT |
547 | break; |
548 | ||
549 | case DLM_RCOM_LOOKUP_REPLY: | |
550 | receive_rcom_lookup_reply(ls, rc); | |
551 | break; | |
552 | ||
553 | case DLM_RCOM_LOCK_REPLY: | |
ae773d0b AV |
554 | if (rc->rc_header.h_length < lock_size) |
555 | goto Eshort; | |
dbcfc347 | 556 | dlm_recover_process_copy(ls, rc); |
e7fd4179 DT |
557 | break; |
558 | ||
559 | default: | |
dbcfc347 | 560 | log_error(ls, "receive_rcom bad type %d", rc->rc_type); |
e7fd4179 | 561 | } |
ae773d0b | 562 | out: |
c36258b5 | 563 | return; |
ae773d0b AV |
564 | Eshort: |
565 | log_error(ls, "recovery message %x from %d is too short", | |
566 | rc->rc_type, nodeid); | |
e7fd4179 DT |
567 | } |
568 |