Commit | Line | Data |
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b8907339 PR |
1 | /* |
2 | drbd_state.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | Thanks to Carter Burden, Bart Grantham and Gennadiy Nerubayev | |
11 | from Logicworks, Inc. for making SDP replication support possible. | |
12 | ||
13 | drbd is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2, or (at your option) | |
16 | any later version. | |
17 | ||
18 | drbd is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with drbd; see the file COPYING. If not, write to | |
25 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/drbd_limits.h> | |
29 | #include "drbd_int.h" | |
30 | #include "drbd_req.h" | |
31 | ||
32 | struct after_state_chg_work { | |
33 | struct drbd_work w; | |
34 | union drbd_state os; | |
35 | union drbd_state ns; | |
36 | enum chg_state_flags flags; | |
37 | struct completion *done; | |
38 | }; | |
39 | ||
99920dc5 | 40 | static int w_after_state_ch(struct drbd_work *w, int unused); |
b8907339 PR |
41 | static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, |
42 | union drbd_state ns, enum chg_state_flags flags); | |
0e29d163 | 43 | static void after_all_state_ch(struct drbd_tconn *tconn); |
a75f34ad PR |
44 | static enum drbd_state_rv is_valid_state(struct drbd_conf *, union drbd_state); |
45 | static enum drbd_state_rv is_valid_soft_transition(union drbd_state, union drbd_state); | |
3509502d | 46 | static enum drbd_state_rv is_valid_transition(union drbd_state os, union drbd_state ns); |
4308a0a3 PR |
47 | static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns, |
48 | const char **warn_sync_abort); | |
b8907339 | 49 | |
d0456c72 | 50 | bool conn_all_vols_unconf(struct drbd_tconn *tconn) |
0e29d163 PR |
51 | { |
52 | struct drbd_conf *mdev; | |
e90285e0 | 53 | int vnr; |
0e29d163 | 54 | |
e90285e0 | 55 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
d0456c72 LE |
56 | if (mdev->state.disk != D_DISKLESS || |
57 | mdev->state.conn != C_STANDALONE || | |
58 | mdev->state.role != R_SECONDARY) | |
59 | return false; | |
0e29d163 | 60 | } |
d0456c72 | 61 | return true; |
0e29d163 PR |
62 | } |
63 | ||
cb703454 PR |
64 | /* Unfortunately the states where not correctly ordered, when |
65 | they where defined. therefore can not use max_t() here. */ | |
66 | static enum drbd_role max_role(enum drbd_role role1, enum drbd_role role2) | |
67 | { | |
68 | if (role1 == R_PRIMARY || role2 == R_PRIMARY) | |
69 | return R_PRIMARY; | |
70 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
71 | return R_SECONDARY; | |
72 | return R_UNKNOWN; | |
73 | } | |
74 | static enum drbd_role min_role(enum drbd_role role1, enum drbd_role role2) | |
75 | { | |
76 | if (role1 == R_UNKNOWN || role2 == R_UNKNOWN) | |
77 | return R_UNKNOWN; | |
78 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
79 | return R_SECONDARY; | |
80 | return R_PRIMARY; | |
81 | } | |
82 | ||
83 | enum drbd_role conn_highest_role(struct drbd_tconn *tconn) | |
84 | { | |
85 | enum drbd_role role = R_UNKNOWN; | |
86 | struct drbd_conf *mdev; | |
87 | int vnr; | |
88 | ||
89 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
90 | role = max_role(role, mdev->state.role); | |
91 | ||
92 | return role; | |
93 | } | |
94 | ||
95 | enum drbd_role conn_highest_peer(struct drbd_tconn *tconn) | |
96 | { | |
97 | enum drbd_role peer = R_UNKNOWN; | |
98 | struct drbd_conf *mdev; | |
99 | int vnr; | |
100 | ||
101 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
102 | peer = max_role(peer, mdev->state.peer); | |
103 | ||
104 | return peer; | |
105 | } | |
106 | ||
107 | enum drbd_disk_state conn_highest_disk(struct drbd_tconn *tconn) | |
108 | { | |
109 | enum drbd_disk_state ds = D_DISKLESS; | |
110 | struct drbd_conf *mdev; | |
111 | int vnr; | |
112 | ||
113 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
114 | ds = max_t(enum drbd_disk_state, ds, mdev->state.disk); | |
115 | ||
116 | return ds; | |
117 | } | |
118 | ||
119 | enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn) | |
120 | { | |
121 | enum drbd_disk_state ds = D_DISKLESS; | |
122 | struct drbd_conf *mdev; | |
123 | int vnr; | |
124 | ||
125 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
126 | ds = max_t(enum drbd_disk_state, ds, mdev->state.pdsk); | |
127 | ||
128 | return ds; | |
129 | } | |
130 | ||
b8907339 PR |
131 | /** |
132 | * cl_wide_st_chg() - true if the state change is a cluster wide one | |
133 | * @mdev: DRBD device. | |
134 | * @os: old (current) state. | |
135 | * @ns: new (wanted) state. | |
136 | */ | |
137 | static int cl_wide_st_chg(struct drbd_conf *mdev, | |
138 | union drbd_state os, union drbd_state ns) | |
139 | { | |
140 | return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED && | |
141 | ((os.role != R_PRIMARY && ns.role == R_PRIMARY) || | |
142 | (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
143 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) || | |
144 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))) || | |
145 | (os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) || | |
146 | (os.conn == C_CONNECTED && ns.conn == C_VERIFY_S); | |
147 | } | |
148 | ||
56707f9e PR |
149 | static union drbd_state |
150 | apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val) | |
151 | { | |
152 | union drbd_state ns; | |
153 | ns.i = (os.i & ~mask.i) | val.i; | |
154 | return ns; | |
155 | } | |
156 | ||
b8907339 PR |
157 | enum drbd_state_rv |
158 | drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f, | |
159 | union drbd_state mask, union drbd_state val) | |
160 | { | |
161 | unsigned long flags; | |
56707f9e | 162 | union drbd_state ns; |
b8907339 PR |
163 | enum drbd_state_rv rv; |
164 | ||
165 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
56707f9e | 166 | ns = apply_mask_val(mdev->state, mask, val); |
b8907339 PR |
167 | rv = _drbd_set_state(mdev, ns, f, NULL); |
168 | ns = mdev->state; | |
169 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
170 | ||
171 | return rv; | |
172 | } | |
173 | ||
174 | /** | |
175 | * drbd_force_state() - Impose a change which happens outside our control on our state | |
176 | * @mdev: DRBD device. | |
177 | * @mask: mask of state bits to change. | |
178 | * @val: value of new state bits. | |
179 | */ | |
180 | void drbd_force_state(struct drbd_conf *mdev, | |
181 | union drbd_state mask, union drbd_state val) | |
182 | { | |
183 | drbd_change_state(mdev, CS_HARD, mask, val); | |
184 | } | |
185 | ||
186 | static enum drbd_state_rv | |
187 | _req_st_cond(struct drbd_conf *mdev, union drbd_state mask, | |
188 | union drbd_state val) | |
189 | { | |
190 | union drbd_state os, ns; | |
191 | unsigned long flags; | |
192 | enum drbd_state_rv rv; | |
193 | ||
194 | if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &mdev->flags)) | |
195 | return SS_CW_SUCCESS; | |
196 | ||
197 | if (test_and_clear_bit(CL_ST_CHG_FAIL, &mdev->flags)) | |
198 | return SS_CW_FAILED_BY_PEER; | |
199 | ||
b8907339 PR |
200 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); |
201 | os = mdev->state; | |
56707f9e | 202 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d PR |
203 | rv = is_valid_transition(os, ns); |
204 | if (rv == SS_SUCCESS) | |
205 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
b8907339 PR |
206 | |
207 | if (!cl_wide_st_chg(mdev, os, ns)) | |
208 | rv = SS_CW_NO_NEED; | |
3509502d | 209 | if (rv == SS_UNKNOWN_ERROR) { |
b8907339 PR |
210 | rv = is_valid_state(mdev, ns); |
211 | if (rv == SS_SUCCESS) { | |
a75f34ad | 212 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
213 | if (rv == SS_SUCCESS) |
214 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
215 | } | |
216 | } | |
217 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
218 | ||
219 | return rv; | |
220 | } | |
221 | ||
222 | /** | |
223 | * drbd_req_state() - Perform an eventually cluster wide state change | |
224 | * @mdev: DRBD device. | |
225 | * @mask: mask of state bits to change. | |
226 | * @val: value of new state bits. | |
227 | * @f: flags | |
228 | * | |
229 | * Should not be called directly, use drbd_request_state() or | |
230 | * _drbd_request_state(). | |
231 | */ | |
232 | static enum drbd_state_rv | |
233 | drbd_req_state(struct drbd_conf *mdev, union drbd_state mask, | |
234 | union drbd_state val, enum chg_state_flags f) | |
235 | { | |
236 | struct completion done; | |
237 | unsigned long flags; | |
238 | union drbd_state os, ns; | |
239 | enum drbd_state_rv rv; | |
240 | ||
241 | init_completion(&done); | |
242 | ||
243 | if (f & CS_SERIALIZE) | |
8410da8f | 244 | mutex_lock(mdev->state_mutex); |
b8907339 PR |
245 | |
246 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
247 | os = mdev->state; | |
56707f9e | 248 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d | 249 | rv = is_valid_transition(os, ns); |
3c5e5f6a LE |
250 | if (rv < SS_SUCCESS) { |
251 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
3509502d | 252 | goto abort; |
3c5e5f6a | 253 | } |
b8907339 PR |
254 | |
255 | if (cl_wide_st_chg(mdev, os, ns)) { | |
256 | rv = is_valid_state(mdev, ns); | |
257 | if (rv == SS_SUCCESS) | |
a75f34ad | 258 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
259 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); |
260 | ||
261 | if (rv < SS_SUCCESS) { | |
262 | if (f & CS_VERBOSE) | |
263 | print_st_err(mdev, os, ns, rv); | |
264 | goto abort; | |
265 | } | |
266 | ||
d24ae219 | 267 | if (drbd_send_state_req(mdev, mask, val)) { |
b8907339 PR |
268 | rv = SS_CW_FAILED_BY_PEER; |
269 | if (f & CS_VERBOSE) | |
270 | print_st_err(mdev, os, ns, rv); | |
271 | goto abort; | |
272 | } | |
273 | ||
274 | wait_event(mdev->state_wait, | |
275 | (rv = _req_st_cond(mdev, mask, val))); | |
276 | ||
277 | if (rv < SS_SUCCESS) { | |
b8907339 PR |
278 | if (f & CS_VERBOSE) |
279 | print_st_err(mdev, os, ns, rv); | |
280 | goto abort; | |
281 | } | |
282 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
56707f9e | 283 | ns = apply_mask_val(mdev->state, mask, val); |
b8907339 | 284 | rv = _drbd_set_state(mdev, ns, f, &done); |
b8907339 PR |
285 | } else { |
286 | rv = _drbd_set_state(mdev, ns, f, &done); | |
287 | } | |
288 | ||
289 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
290 | ||
291 | if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) { | |
292 | D_ASSERT(current != mdev->tconn->worker.task); | |
293 | wait_for_completion(&done); | |
294 | } | |
295 | ||
296 | abort: | |
297 | if (f & CS_SERIALIZE) | |
8410da8f | 298 | mutex_unlock(mdev->state_mutex); |
b8907339 PR |
299 | |
300 | return rv; | |
301 | } | |
302 | ||
303 | /** | |
304 | * _drbd_request_state() - Request a state change (with flags) | |
305 | * @mdev: DRBD device. | |
306 | * @mask: mask of state bits to change. | |
307 | * @val: value of new state bits. | |
308 | * @f: flags | |
309 | * | |
310 | * Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE | |
311 | * flag, or when logging of failed state change requests is not desired. | |
312 | */ | |
313 | enum drbd_state_rv | |
314 | _drbd_request_state(struct drbd_conf *mdev, union drbd_state mask, | |
315 | union drbd_state val, enum chg_state_flags f) | |
316 | { | |
317 | enum drbd_state_rv rv; | |
318 | ||
319 | wait_event(mdev->state_wait, | |
320 | (rv = drbd_req_state(mdev, mask, val, f)) != SS_IN_TRANSIENT_STATE); | |
321 | ||
322 | return rv; | |
323 | } | |
324 | ||
325 | static void print_st(struct drbd_conf *mdev, char *name, union drbd_state ns) | |
326 | { | |
327 | dev_err(DEV, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n", | |
328 | name, | |
329 | drbd_conn_str(ns.conn), | |
330 | drbd_role_str(ns.role), | |
331 | drbd_role_str(ns.peer), | |
332 | drbd_disk_str(ns.disk), | |
333 | drbd_disk_str(ns.pdsk), | |
334 | is_susp(ns) ? 's' : 'r', | |
335 | ns.aftr_isp ? 'a' : '-', | |
336 | ns.peer_isp ? 'p' : '-', | |
337 | ns.user_isp ? 'u' : '-', | |
338 | ns.susp_fen ? 'F' : '-', | |
339 | ns.susp_nod ? 'N' : '-' | |
340 | ); | |
341 | } | |
342 | ||
343 | void print_st_err(struct drbd_conf *mdev, union drbd_state os, | |
344 | union drbd_state ns, enum drbd_state_rv err) | |
345 | { | |
346 | if (err == SS_IN_TRANSIENT_STATE) | |
347 | return; | |
348 | dev_err(DEV, "State change failed: %s\n", drbd_set_st_err_str(err)); | |
349 | print_st(mdev, " state", os); | |
350 | print_st(mdev, "wanted", ns); | |
351 | } | |
352 | ||
bbeb641c PR |
353 | static void print_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns, |
354 | enum chg_state_flags flags) | |
355 | { | |
356 | char *pbp, pb[300]; | |
357 | pbp = pb; | |
358 | *pbp = 0; | |
359 | if (ns.role != os.role) | |
360 | pbp += sprintf(pbp, "role( %s -> %s ) ", | |
361 | drbd_role_str(os.role), | |
362 | drbd_role_str(ns.role)); | |
363 | if (ns.peer != os.peer) | |
364 | pbp += sprintf(pbp, "peer( %s -> %s ) ", | |
365 | drbd_role_str(os.peer), | |
366 | drbd_role_str(ns.peer)); | |
367 | if (ns.conn != os.conn && !(flags & CS_NO_CSTATE_CHG)) | |
368 | pbp += sprintf(pbp, "conn( %s -> %s ) ", | |
369 | drbd_conn_str(os.conn), | |
370 | drbd_conn_str(ns.conn)); | |
371 | if (ns.disk != os.disk) | |
372 | pbp += sprintf(pbp, "disk( %s -> %s ) ", | |
373 | drbd_disk_str(os.disk), | |
374 | drbd_disk_str(ns.disk)); | |
375 | if (ns.pdsk != os.pdsk) | |
376 | pbp += sprintf(pbp, "pdsk( %s -> %s ) ", | |
377 | drbd_disk_str(os.pdsk), | |
378 | drbd_disk_str(ns.pdsk)); | |
379 | if (is_susp(ns) != is_susp(os)) | |
380 | pbp += sprintf(pbp, "susp( %d -> %d ) ", | |
381 | is_susp(os), | |
382 | is_susp(ns)); | |
383 | if (ns.aftr_isp != os.aftr_isp) | |
384 | pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ", | |
385 | os.aftr_isp, | |
386 | ns.aftr_isp); | |
387 | if (ns.peer_isp != os.peer_isp) | |
388 | pbp += sprintf(pbp, "peer_isp( %d -> %d ) ", | |
389 | os.peer_isp, | |
390 | ns.peer_isp); | |
391 | if (ns.user_isp != os.user_isp) | |
392 | pbp += sprintf(pbp, "user_isp( %d -> %d ) ", | |
393 | os.user_isp, | |
394 | ns.user_isp); | |
395 | if (pbp != pb) | |
396 | dev_info(DEV, "%s\n", pb); | |
397 | } | |
b8907339 PR |
398 | |
399 | /** | |
400 | * is_valid_state() - Returns an SS_ error code if ns is not valid | |
401 | * @mdev: DRBD device. | |
402 | * @ns: State to consider. | |
403 | */ | |
404 | static enum drbd_state_rv | |
405 | is_valid_state(struct drbd_conf *mdev, union drbd_state ns) | |
406 | { | |
407 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
408 | ||
409 | enum drbd_fencing_p fp; | |
410 | enum drbd_state_rv rv = SS_SUCCESS; | |
411 | ||
412 | fp = FP_DONT_CARE; | |
413 | if (get_ldev(mdev)) { | |
414 | fp = mdev->ldev->dc.fencing; | |
415 | put_ldev(mdev); | |
416 | } | |
417 | ||
418 | if (get_net_conf(mdev->tconn)) { | |
047e95e2 PR |
419 | if (!mdev->tconn->net_conf->two_primaries && ns.role == R_PRIMARY) { |
420 | if (ns.peer == R_PRIMARY) | |
421 | rv = SS_TWO_PRIMARIES; | |
cb703454 | 422 | else if (conn_highest_peer(mdev->tconn) == R_PRIMARY) |
047e95e2 PR |
423 | rv = SS_O_VOL_PEER_PRI; |
424 | } | |
b8907339 PR |
425 | put_net_conf(mdev->tconn); |
426 | } | |
427 | ||
428 | if (rv <= 0) | |
429 | /* already found a reason to abort */; | |
430 | else if (ns.role == R_SECONDARY && mdev->open_cnt) | |
431 | rv = SS_DEVICE_IN_USE; | |
432 | ||
433 | else if (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.disk < D_UP_TO_DATE) | |
434 | rv = SS_NO_UP_TO_DATE_DISK; | |
435 | ||
436 | else if (fp >= FP_RESOURCE && | |
437 | ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk >= D_UNKNOWN) | |
438 | rv = SS_PRIMARY_NOP; | |
439 | ||
440 | else if (ns.role == R_PRIMARY && ns.disk <= D_INCONSISTENT && ns.pdsk <= D_INCONSISTENT) | |
441 | rv = SS_NO_UP_TO_DATE_DISK; | |
442 | ||
443 | else if (ns.conn > C_CONNECTED && ns.disk < D_INCONSISTENT) | |
444 | rv = SS_NO_LOCAL_DISK; | |
445 | ||
446 | else if (ns.conn > C_CONNECTED && ns.pdsk < D_INCONSISTENT) | |
447 | rv = SS_NO_REMOTE_DISK; | |
448 | ||
449 | else if (ns.conn > C_CONNECTED && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) | |
450 | rv = SS_NO_UP_TO_DATE_DISK; | |
451 | ||
452 | else if ((ns.conn == C_CONNECTED || | |
453 | ns.conn == C_WF_BITMAP_S || | |
454 | ns.conn == C_SYNC_SOURCE || | |
455 | ns.conn == C_PAUSED_SYNC_S) && | |
456 | ns.disk == D_OUTDATED) | |
457 | rv = SS_CONNECTED_OUTDATES; | |
458 | ||
459 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
f399002e | 460 | (mdev->tconn->net_conf->verify_alg[0] == 0)) |
b8907339 PR |
461 | rv = SS_NO_VERIFY_ALG; |
462 | ||
463 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
464 | mdev->tconn->agreed_pro_version < 88) | |
465 | rv = SS_NOT_SUPPORTED; | |
466 | ||
467 | else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN) | |
468 | rv = SS_CONNECTED_OUTDATES; | |
469 | ||
470 | return rv; | |
471 | } | |
472 | ||
473 | /** | |
a75f34ad | 474 | * is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible |
3509502d PR |
475 | * This function limits state transitions that may be declined by DRBD. I.e. |
476 | * user requests (aka soft transitions). | |
b8907339 PR |
477 | * @mdev: DRBD device. |
478 | * @ns: new state. | |
479 | * @os: old state. | |
480 | */ | |
481 | static enum drbd_state_rv | |
a75f34ad | 482 | is_valid_soft_transition(union drbd_state os, union drbd_state ns) |
b8907339 PR |
483 | { |
484 | enum drbd_state_rv rv = SS_SUCCESS; | |
485 | ||
486 | if ((ns.conn == C_STARTING_SYNC_T || ns.conn == C_STARTING_SYNC_S) && | |
487 | os.conn > C_CONNECTED) | |
488 | rv = SS_RESYNC_RUNNING; | |
489 | ||
490 | if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE) | |
491 | rv = SS_ALREADY_STANDALONE; | |
492 | ||
493 | if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS) | |
494 | rv = SS_IS_DISKLESS; | |
495 | ||
496 | if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED) | |
497 | rv = SS_NO_NET_CONFIG; | |
498 | ||
499 | if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING) | |
500 | rv = SS_LOWER_THAN_OUTDATED; | |
501 | ||
502 | if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED) | |
503 | rv = SS_IN_TRANSIENT_STATE; | |
504 | ||
2325eb66 PR |
505 | /* if (ns.conn == os.conn && ns.conn == C_WF_REPORT_PARAMS) |
506 | rv = SS_IN_TRANSIENT_STATE; */ | |
b8907339 PR |
507 | |
508 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED) | |
509 | rv = SS_NEED_CONNECTION; | |
510 | ||
511 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
512 | ns.conn != os.conn && os.conn > C_CONNECTED) | |
513 | rv = SS_RESYNC_RUNNING; | |
514 | ||
515 | if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) && | |
516 | os.conn < C_CONNECTED) | |
517 | rv = SS_NEED_CONNECTION; | |
518 | ||
519 | if ((ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE) | |
520 | && os.conn < C_WF_REPORT_PARAMS) | |
521 | rv = SS_NEED_CONNECTION; /* No NetworkFailure -> SyncTarget etc... */ | |
522 | ||
523 | return rv; | |
524 | } | |
525 | ||
3509502d | 526 | static enum drbd_state_rv |
fda74117 | 527 | is_valid_conn_transition(enum drbd_conns oc, enum drbd_conns nc) |
3509502d PR |
528 | { |
529 | enum drbd_state_rv rv = SS_SUCCESS; | |
530 | ||
531 | /* Disallow Network errors to configure a device's network part */ | |
fda74117 | 532 | if ((nc >= C_TIMEOUT && nc <= C_TEAR_DOWN) && oc <= C_DISCONNECTING) |
3509502d PR |
533 | rv = SS_NEED_CONNECTION; |
534 | ||
535 | /* After a network error only C_UNCONNECTED or C_DISCONNECTING may follow. */ | |
fda74117 | 536 | if (oc >= C_TIMEOUT && oc <= C_TEAR_DOWN && nc != C_UNCONNECTED && nc != C_DISCONNECTING) |
3509502d PR |
537 | rv = SS_IN_TRANSIENT_STATE; |
538 | ||
539 | /* After C_DISCONNECTING only C_STANDALONE may follow */ | |
fda74117 | 540 | if (oc == C_DISCONNECTING && nc != C_STANDALONE) |
3509502d PR |
541 | rv = SS_IN_TRANSIENT_STATE; |
542 | ||
fda74117 PR |
543 | return rv; |
544 | } | |
545 | ||
546 | ||
547 | /** | |
548 | * is_valid_transition() - Returns an SS_ error code if the state transition is not possible | |
549 | * This limits hard state transitions. Hard state transitions are facts there are | |
550 | * imposed on DRBD by the environment. E.g. disk broke or network broke down. | |
551 | * But those hard state transitions are still not allowed to do everything. | |
552 | * @ns: new state. | |
553 | * @os: old state. | |
554 | */ | |
555 | static enum drbd_state_rv | |
556 | is_valid_transition(union drbd_state os, union drbd_state ns) | |
557 | { | |
558 | enum drbd_state_rv rv; | |
559 | ||
560 | rv = is_valid_conn_transition(os.conn, ns.conn); | |
561 | ||
3509502d PR |
562 | /* we cannot fail (again) if we already detached */ |
563 | if (ns.disk == D_FAILED && os.disk == D_DISKLESS) | |
564 | rv = SS_IS_DISKLESS; | |
565 | ||
4308a0a3 PR |
566 | /* if we are only D_ATTACHING yet, |
567 | * we can (and should) go directly to D_DISKLESS. */ | |
568 | if (ns.disk == D_FAILED && os.disk == D_ATTACHING) { | |
569 | printk("TODO: FIX ME\n"); | |
570 | rv = SS_IS_DISKLESS; | |
571 | } | |
572 | ||
3509502d PR |
573 | return rv; |
574 | } | |
575 | ||
b8907339 PR |
576 | /** |
577 | * sanitize_state() - Resolves implicitly necessary additional changes to a state transition | |
578 | * @mdev: DRBD device. | |
579 | * @os: old state. | |
580 | * @ns: new state. | |
581 | * @warn_sync_abort: | |
582 | * | |
583 | * When we loose connection, we have to set the state of the peers disk (pdsk) | |
584 | * to D_UNKNOWN. This rule and many more along those lines are in this function. | |
585 | */ | |
4308a0a3 PR |
586 | static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns, |
587 | const char **warn_sync_abort) | |
b8907339 PR |
588 | { |
589 | enum drbd_fencing_p fp; | |
590 | enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max; | |
591 | ||
592 | fp = FP_DONT_CARE; | |
593 | if (get_ldev(mdev)) { | |
594 | fp = mdev->ldev->dc.fencing; | |
595 | put_ldev(mdev); | |
596 | } | |
597 | ||
3509502d | 598 | /* Implications from connection to peer and peer_isp */ |
b8907339 PR |
599 | if (ns.conn < C_CONNECTED) { |
600 | ns.peer_isp = 0; | |
601 | ns.peer = R_UNKNOWN; | |
602 | if (ns.pdsk > D_UNKNOWN || ns.pdsk < D_INCONSISTENT) | |
603 | ns.pdsk = D_UNKNOWN; | |
604 | } | |
605 | ||
606 | /* Clear the aftr_isp when becoming unconfigured */ | |
607 | if (ns.conn == C_STANDALONE && ns.disk == D_DISKLESS && ns.role == R_SECONDARY) | |
608 | ns.aftr_isp = 0; | |
609 | ||
4308a0a3 | 610 | /* An implication of the disk states onto the connection state */ |
b8907339 | 611 | /* Abort resync if a disk fails/detaches */ |
4308a0a3 | 612 | if (ns.conn > C_CONNECTED && (ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) { |
b8907339 PR |
613 | if (warn_sync_abort) |
614 | *warn_sync_abort = | |
4308a0a3 | 615 | ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ? |
b8907339 PR |
616 | "Online-verify" : "Resync"; |
617 | ns.conn = C_CONNECTED; | |
618 | } | |
619 | ||
620 | /* Connection breaks down before we finished "Negotiating" */ | |
621 | if (ns.conn < C_CONNECTED && ns.disk == D_NEGOTIATING && | |
622 | get_ldev_if_state(mdev, D_NEGOTIATING)) { | |
623 | if (mdev->ed_uuid == mdev->ldev->md.uuid[UI_CURRENT]) { | |
624 | ns.disk = mdev->new_state_tmp.disk; | |
625 | ns.pdsk = mdev->new_state_tmp.pdsk; | |
626 | } else { | |
627 | dev_alert(DEV, "Connection lost while negotiating, no data!\n"); | |
628 | ns.disk = D_DISKLESS; | |
629 | ns.pdsk = D_UNKNOWN; | |
630 | } | |
631 | put_ldev(mdev); | |
632 | } | |
633 | ||
634 | /* D_CONSISTENT and D_OUTDATED vanish when we get connected */ | |
635 | if (ns.conn >= C_CONNECTED && ns.conn < C_AHEAD) { | |
636 | if (ns.disk == D_CONSISTENT || ns.disk == D_OUTDATED) | |
637 | ns.disk = D_UP_TO_DATE; | |
638 | if (ns.pdsk == D_CONSISTENT || ns.pdsk == D_OUTDATED) | |
639 | ns.pdsk = D_UP_TO_DATE; | |
640 | } | |
641 | ||
642 | /* Implications of the connection stat on the disk states */ | |
643 | disk_min = D_DISKLESS; | |
644 | disk_max = D_UP_TO_DATE; | |
645 | pdsk_min = D_INCONSISTENT; | |
646 | pdsk_max = D_UNKNOWN; | |
647 | switch ((enum drbd_conns)ns.conn) { | |
648 | case C_WF_BITMAP_T: | |
649 | case C_PAUSED_SYNC_T: | |
650 | case C_STARTING_SYNC_T: | |
651 | case C_WF_SYNC_UUID: | |
652 | case C_BEHIND: | |
653 | disk_min = D_INCONSISTENT; | |
654 | disk_max = D_OUTDATED; | |
655 | pdsk_min = D_UP_TO_DATE; | |
656 | pdsk_max = D_UP_TO_DATE; | |
657 | break; | |
658 | case C_VERIFY_S: | |
659 | case C_VERIFY_T: | |
660 | disk_min = D_UP_TO_DATE; | |
661 | disk_max = D_UP_TO_DATE; | |
662 | pdsk_min = D_UP_TO_DATE; | |
663 | pdsk_max = D_UP_TO_DATE; | |
664 | break; | |
665 | case C_CONNECTED: | |
666 | disk_min = D_DISKLESS; | |
667 | disk_max = D_UP_TO_DATE; | |
668 | pdsk_min = D_DISKLESS; | |
669 | pdsk_max = D_UP_TO_DATE; | |
670 | break; | |
671 | case C_WF_BITMAP_S: | |
672 | case C_PAUSED_SYNC_S: | |
673 | case C_STARTING_SYNC_S: | |
674 | case C_AHEAD: | |
675 | disk_min = D_UP_TO_DATE; | |
676 | disk_max = D_UP_TO_DATE; | |
677 | pdsk_min = D_INCONSISTENT; | |
678 | pdsk_max = D_CONSISTENT; /* D_OUTDATED would be nice. But explicit outdate necessary*/ | |
679 | break; | |
680 | case C_SYNC_TARGET: | |
681 | disk_min = D_INCONSISTENT; | |
682 | disk_max = D_INCONSISTENT; | |
683 | pdsk_min = D_UP_TO_DATE; | |
684 | pdsk_max = D_UP_TO_DATE; | |
685 | break; | |
686 | case C_SYNC_SOURCE: | |
687 | disk_min = D_UP_TO_DATE; | |
688 | disk_max = D_UP_TO_DATE; | |
689 | pdsk_min = D_INCONSISTENT; | |
690 | pdsk_max = D_INCONSISTENT; | |
691 | break; | |
692 | case C_STANDALONE: | |
693 | case C_DISCONNECTING: | |
694 | case C_UNCONNECTED: | |
695 | case C_TIMEOUT: | |
696 | case C_BROKEN_PIPE: | |
697 | case C_NETWORK_FAILURE: | |
698 | case C_PROTOCOL_ERROR: | |
699 | case C_TEAR_DOWN: | |
700 | case C_WF_CONNECTION: | |
701 | case C_WF_REPORT_PARAMS: | |
702 | case C_MASK: | |
703 | break; | |
704 | } | |
705 | if (ns.disk > disk_max) | |
706 | ns.disk = disk_max; | |
707 | ||
708 | if (ns.disk < disk_min) { | |
709 | dev_warn(DEV, "Implicitly set disk from %s to %s\n", | |
710 | drbd_disk_str(ns.disk), drbd_disk_str(disk_min)); | |
711 | ns.disk = disk_min; | |
712 | } | |
713 | if (ns.pdsk > pdsk_max) | |
714 | ns.pdsk = pdsk_max; | |
715 | ||
716 | if (ns.pdsk < pdsk_min) { | |
717 | dev_warn(DEV, "Implicitly set pdsk from %s to %s\n", | |
718 | drbd_disk_str(ns.pdsk), drbd_disk_str(pdsk_min)); | |
719 | ns.pdsk = pdsk_min; | |
720 | } | |
721 | ||
722 | if (fp == FP_STONITH && | |
4308a0a3 | 723 | (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED)) |
b8907339 PR |
724 | ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */ |
725 | ||
f399002e | 726 | if (mdev->tconn->res_opts.on_no_data == OND_SUSPEND_IO && |
4308a0a3 | 727 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) |
b8907339 PR |
728 | ns.susp_nod = 1; /* Suspend IO while no data available (no accessible data available) */ |
729 | ||
730 | if (ns.aftr_isp || ns.peer_isp || ns.user_isp) { | |
731 | if (ns.conn == C_SYNC_SOURCE) | |
732 | ns.conn = C_PAUSED_SYNC_S; | |
733 | if (ns.conn == C_SYNC_TARGET) | |
734 | ns.conn = C_PAUSED_SYNC_T; | |
735 | } else { | |
736 | if (ns.conn == C_PAUSED_SYNC_S) | |
737 | ns.conn = C_SYNC_SOURCE; | |
738 | if (ns.conn == C_PAUSED_SYNC_T) | |
739 | ns.conn = C_SYNC_TARGET; | |
740 | } | |
741 | ||
742 | return ns; | |
743 | } | |
744 | ||
745 | void drbd_resume_al(struct drbd_conf *mdev) | |
746 | { | |
747 | if (test_and_clear_bit(AL_SUSPENDED, &mdev->flags)) | |
748 | dev_info(DEV, "Resumed AL updates\n"); | |
749 | } | |
750 | ||
751 | /* helper for __drbd_set_state */ | |
752 | static void set_ov_position(struct drbd_conf *mdev, enum drbd_conns cs) | |
753 | { | |
754 | if (mdev->tconn->agreed_pro_version < 90) | |
755 | mdev->ov_start_sector = 0; | |
756 | mdev->rs_total = drbd_bm_bits(mdev); | |
757 | mdev->ov_position = 0; | |
758 | if (cs == C_VERIFY_T) { | |
759 | /* starting online verify from an arbitrary position | |
760 | * does not fit well into the existing protocol. | |
761 | * on C_VERIFY_T, we initialize ov_left and friends | |
762 | * implicitly in receive_DataRequest once the | |
763 | * first P_OV_REQUEST is received */ | |
764 | mdev->ov_start_sector = ~(sector_t)0; | |
765 | } else { | |
766 | unsigned long bit = BM_SECT_TO_BIT(mdev->ov_start_sector); | |
767 | if (bit >= mdev->rs_total) { | |
768 | mdev->ov_start_sector = | |
769 | BM_BIT_TO_SECT(mdev->rs_total - 1); | |
770 | mdev->rs_total = 1; | |
771 | } else | |
772 | mdev->rs_total -= bit; | |
773 | mdev->ov_position = mdev->ov_start_sector; | |
774 | } | |
775 | mdev->ov_left = mdev->rs_total; | |
776 | } | |
777 | ||
778 | /** | |
779 | * __drbd_set_state() - Set a new DRBD state | |
780 | * @mdev: DRBD device. | |
781 | * @ns: new state. | |
782 | * @flags: Flags | |
783 | * @done: Optional completion, that will get completed after the after_state_ch() finished | |
784 | * | |
785 | * Caller needs to hold req_lock, and global_state_lock. Do not call directly. | |
786 | */ | |
787 | enum drbd_state_rv | |
788 | __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns, | |
789 | enum chg_state_flags flags, struct completion *done) | |
790 | { | |
791 | union drbd_state os; | |
792 | enum drbd_state_rv rv = SS_SUCCESS; | |
793 | const char *warn_sync_abort = NULL; | |
794 | struct after_state_chg_work *ascw; | |
795 | ||
796 | os = mdev->state; | |
797 | ||
4308a0a3 | 798 | ns = sanitize_state(mdev, ns, &warn_sync_abort); |
b8907339 PR |
799 | if (ns.i == os.i) |
800 | return SS_NOTHING_TO_DO; | |
801 | ||
3509502d PR |
802 | rv = is_valid_transition(os, ns); |
803 | if (rv < SS_SUCCESS) | |
804 | return rv; | |
805 | ||
b8907339 PR |
806 | if (!(flags & CS_HARD)) { |
807 | /* pre-state-change checks ; only look at ns */ | |
808 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
809 | ||
810 | rv = is_valid_state(mdev, ns); | |
811 | if (rv < SS_SUCCESS) { | |
812 | /* If the old state was illegal as well, then let | |
813 | this happen...*/ | |
814 | ||
815 | if (is_valid_state(mdev, os) == rv) | |
a75f34ad | 816 | rv = is_valid_soft_transition(os, ns); |
b8907339 | 817 | } else |
a75f34ad | 818 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
819 | } |
820 | ||
821 | if (rv < SS_SUCCESS) { | |
822 | if (flags & CS_VERBOSE) | |
823 | print_st_err(mdev, os, ns, rv); | |
824 | return rv; | |
825 | } | |
826 | ||
827 | if (warn_sync_abort) | |
828 | dev_warn(DEV, "%s aborted.\n", warn_sync_abort); | |
829 | ||
bbeb641c | 830 | print_state_change(mdev, os, ns, flags); |
b8907339 | 831 | |
b8907339 PR |
832 | /* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference |
833 | * on the ldev here, to be sure the transition -> D_DISKLESS resp. | |
834 | * drbd_ldev_destroy() won't happen before our corresponding | |
835 | * after_state_ch works run, where we put_ldev again. */ | |
836 | if ((os.disk != D_FAILED && ns.disk == D_FAILED) || | |
837 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS)) | |
838 | atomic_inc(&mdev->local_cnt); | |
839 | ||
840 | mdev->state = ns; | |
841 | ||
0e29d163 PR |
842 | /* solve the race between becoming unconfigured, |
843 | * worker doing the cleanup, and | |
844 | * admin reconfiguring us: | |
845 | * on (re)configure, first set CONFIG_PENDING, | |
846 | * then wait for a potentially exiting worker, | |
847 | * start the worker, and schedule one no_op. | |
848 | * then proceed with configuration. | |
849 | */ | |
850 | if(conn_all_vols_unconf(mdev->tconn) && | |
851 | !test_and_set_bit(CONFIG_PENDING, &mdev->tconn->flags)) | |
852 | set_bit(OBJECT_DYING, &mdev->tconn->flags); | |
853 | ||
b8907339 PR |
854 | if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING) |
855 | drbd_print_uuids(mdev, "attached to UUIDs"); | |
856 | ||
857 | wake_up(&mdev->misc_wait); | |
858 | wake_up(&mdev->state_wait); | |
2a67d8b9 | 859 | wake_up(&mdev->tconn->ping_wait); |
b8907339 PR |
860 | |
861 | /* aborted verify run. log the last position */ | |
862 | if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) && | |
863 | ns.conn < C_CONNECTED) { | |
864 | mdev->ov_start_sector = | |
865 | BM_BIT_TO_SECT(drbd_bm_bits(mdev) - mdev->ov_left); | |
866 | dev_info(DEV, "Online Verify reached sector %llu\n", | |
867 | (unsigned long long)mdev->ov_start_sector); | |
868 | } | |
869 | ||
870 | if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) && | |
871 | (ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)) { | |
872 | dev_info(DEV, "Syncer continues.\n"); | |
873 | mdev->rs_paused += (long)jiffies | |
874 | -(long)mdev->rs_mark_time[mdev->rs_last_mark]; | |
875 | if (ns.conn == C_SYNC_TARGET) | |
876 | mod_timer(&mdev->resync_timer, jiffies); | |
877 | } | |
878 | ||
879 | if ((os.conn == C_SYNC_TARGET || os.conn == C_SYNC_SOURCE) && | |
880 | (ns.conn == C_PAUSED_SYNC_T || ns.conn == C_PAUSED_SYNC_S)) { | |
881 | dev_info(DEV, "Resync suspended\n"); | |
882 | mdev->rs_mark_time[mdev->rs_last_mark] = jiffies; | |
883 | } | |
884 | ||
885 | if (os.conn == C_CONNECTED && | |
886 | (ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T)) { | |
887 | unsigned long now = jiffies; | |
888 | int i; | |
889 | ||
890 | set_ov_position(mdev, ns.conn); | |
891 | mdev->rs_start = now; | |
892 | mdev->rs_last_events = 0; | |
893 | mdev->rs_last_sect_ev = 0; | |
894 | mdev->ov_last_oos_size = 0; | |
895 | mdev->ov_last_oos_start = 0; | |
896 | ||
897 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { | |
898 | mdev->rs_mark_left[i] = mdev->ov_left; | |
899 | mdev->rs_mark_time[i] = now; | |
900 | } | |
901 | ||
902 | drbd_rs_controller_reset(mdev); | |
903 | ||
904 | if (ns.conn == C_VERIFY_S) { | |
905 | dev_info(DEV, "Starting Online Verify from sector %llu\n", | |
906 | (unsigned long long)mdev->ov_position); | |
907 | mod_timer(&mdev->resync_timer, jiffies); | |
908 | } | |
909 | } | |
910 | ||
911 | if (get_ldev(mdev)) { | |
912 | u32 mdf = mdev->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND| | |
913 | MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE| | |
914 | MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY); | |
915 | ||
916 | if (test_bit(CRASHED_PRIMARY, &mdev->flags)) | |
917 | mdf |= MDF_CRASHED_PRIMARY; | |
918 | if (mdev->state.role == R_PRIMARY || | |
919 | (mdev->state.pdsk < D_INCONSISTENT && mdev->state.peer == R_PRIMARY)) | |
920 | mdf |= MDF_PRIMARY_IND; | |
921 | if (mdev->state.conn > C_WF_REPORT_PARAMS) | |
922 | mdf |= MDF_CONNECTED_IND; | |
923 | if (mdev->state.disk > D_INCONSISTENT) | |
924 | mdf |= MDF_CONSISTENT; | |
925 | if (mdev->state.disk > D_OUTDATED) | |
926 | mdf |= MDF_WAS_UP_TO_DATE; | |
927 | if (mdev->state.pdsk <= D_OUTDATED && mdev->state.pdsk >= D_INCONSISTENT) | |
928 | mdf |= MDF_PEER_OUT_DATED; | |
929 | if (mdf != mdev->ldev->md.flags) { | |
930 | mdev->ldev->md.flags = mdf; | |
931 | drbd_md_mark_dirty(mdev); | |
932 | } | |
933 | if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT) | |
934 | drbd_set_ed_uuid(mdev, mdev->ldev->md.uuid[UI_CURRENT]); | |
935 | put_ldev(mdev); | |
936 | } | |
937 | ||
938 | /* Peer was forced D_UP_TO_DATE & R_PRIMARY, consider to resync */ | |
939 | if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT && | |
940 | os.peer == R_SECONDARY && ns.peer == R_PRIMARY) | |
941 | set_bit(CONSIDER_RESYNC, &mdev->flags); | |
942 | ||
943 | /* Receiver should clean up itself */ | |
944 | if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING) | |
945 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
946 | ||
947 | /* Now the receiver finished cleaning up itself, it should die */ | |
948 | if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE) | |
949 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
950 | ||
951 | /* Upon network failure, we need to restart the receiver. */ | |
952 | if (os.conn > C_TEAR_DOWN && | |
953 | ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT) | |
954 | drbd_thread_restart_nowait(&mdev->tconn->receiver); | |
955 | ||
956 | /* Resume AL writing if we get a connection */ | |
957 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
958 | drbd_resume_al(mdev); | |
959 | ||
960 | ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC); | |
961 | if (ascw) { | |
962 | ascw->os = os; | |
963 | ascw->ns = ns; | |
964 | ascw->flags = flags; | |
965 | ascw->w.cb = w_after_state_ch; | |
a21e9298 | 966 | ascw->w.mdev = mdev; |
b8907339 PR |
967 | ascw->done = done; |
968 | drbd_queue_work(&mdev->tconn->data.work, &ascw->w); | |
969 | } else { | |
bbeb641c | 970 | dev_err(DEV, "Could not kmalloc an ascw\n"); |
b8907339 PR |
971 | } |
972 | ||
973 | return rv; | |
974 | } | |
975 | ||
99920dc5 | 976 | static int w_after_state_ch(struct drbd_work *w, int unused) |
b8907339 PR |
977 | { |
978 | struct after_state_chg_work *ascw = | |
979 | container_of(w, struct after_state_chg_work, w); | |
00d56944 | 980 | struct drbd_conf *mdev = w->mdev; |
b8907339 PR |
981 | |
982 | after_state_ch(mdev, ascw->os, ascw->ns, ascw->flags); | |
983 | if (ascw->flags & CS_WAIT_COMPLETE) { | |
984 | D_ASSERT(ascw->done != NULL); | |
985 | complete(ascw->done); | |
986 | } | |
987 | kfree(ascw); | |
988 | ||
99920dc5 | 989 | return 0; |
b8907339 PR |
990 | } |
991 | ||
992 | static void abw_start_sync(struct drbd_conf *mdev, int rv) | |
993 | { | |
994 | if (rv) { | |
995 | dev_err(DEV, "Writing the bitmap failed not starting resync.\n"); | |
996 | _drbd_request_state(mdev, NS(conn, C_CONNECTED), CS_VERBOSE); | |
997 | return; | |
998 | } | |
999 | ||
1000 | switch (mdev->state.conn) { | |
1001 | case C_STARTING_SYNC_T: | |
1002 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE); | |
1003 | break; | |
1004 | case C_STARTING_SYNC_S: | |
1005 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1006 | break; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | int drbd_bitmap_io_from_worker(struct drbd_conf *mdev, | |
1011 | int (*io_fn)(struct drbd_conf *), | |
1012 | char *why, enum bm_flag flags) | |
1013 | { | |
1014 | int rv; | |
1015 | ||
1016 | D_ASSERT(current == mdev->tconn->worker.task); | |
1017 | ||
1018 | /* open coded non-blocking drbd_suspend_io(mdev); */ | |
1019 | set_bit(SUSPEND_IO, &mdev->flags); | |
1020 | ||
1021 | drbd_bm_lock(mdev, why, flags); | |
1022 | rv = io_fn(mdev); | |
1023 | drbd_bm_unlock(mdev); | |
1024 | ||
1025 | drbd_resume_io(mdev); | |
1026 | ||
1027 | return rv; | |
1028 | } | |
1029 | ||
1030 | /** | |
1031 | * after_state_ch() - Perform after state change actions that may sleep | |
1032 | * @mdev: DRBD device. | |
1033 | * @os: old state. | |
1034 | * @ns: new state. | |
1035 | * @flags: Flags | |
1036 | */ | |
1037 | static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, | |
1038 | union drbd_state ns, enum chg_state_flags flags) | |
1039 | { | |
1040 | enum drbd_fencing_p fp; | |
1041 | enum drbd_req_event what = NOTHING; | |
69f5ec72 | 1042 | union drbd_state nsm; |
3b98c0c2 LE |
1043 | struct sib_info sib; |
1044 | ||
1045 | sib.sib_reason = SIB_STATE_CHANGE; | |
1046 | sib.os = os; | |
1047 | sib.ns = ns; | |
b8907339 PR |
1048 | |
1049 | if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) { | |
1050 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1051 | if (mdev->p_uuid) | |
1052 | mdev->p_uuid[UI_FLAGS] &= ~((u64)2); | |
1053 | } | |
1054 | ||
1055 | fp = FP_DONT_CARE; | |
1056 | if (get_ldev(mdev)) { | |
1057 | fp = mdev->ldev->dc.fencing; | |
1058 | put_ldev(mdev); | |
1059 | } | |
1060 | ||
1061 | /* Inform userspace about the change... */ | |
3b98c0c2 | 1062 | drbd_bcast_event(mdev, &sib); |
b8907339 PR |
1063 | |
1064 | if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) && | |
1065 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) | |
1066 | drbd_khelper(mdev, "pri-on-incon-degr"); | |
1067 | ||
1068 | /* Here we have the actions that are performed after a | |
1069 | state change. This function might sleep */ | |
1070 | ||
1071 | nsm.i = -1; | |
1072 | if (ns.susp_nod) { | |
1073 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
1074 | what = RESEND; | |
1075 | ||
1076 | if (os.disk == D_ATTACHING && ns.disk > D_ATTACHING) | |
1077 | what = RESTART_FROZEN_DISK_IO; | |
1078 | ||
1079 | if (what != NOTHING) | |
1080 | nsm.susp_nod = 0; | |
1081 | } | |
1082 | ||
1083 | if (ns.susp_fen) { | |
1084 | /* case1: The outdate peer handler is successful: */ | |
1085 | if (os.pdsk > D_OUTDATED && ns.pdsk <= D_OUTDATED) { | |
2f5cdd0b | 1086 | tl_clear(mdev->tconn); |
b8907339 PR |
1087 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
1088 | drbd_uuid_new_current(mdev); | |
1089 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1090 | } | |
1091 | spin_lock_irq(&mdev->tconn->req_lock); | |
1092 | _drbd_set_state(_NS(mdev, susp_fen, 0), CS_VERBOSE, NULL); | |
1093 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1094 | } | |
1095 | /* case2: The connection was established again: */ | |
1096 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { | |
1097 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1098 | what = RESEND; | |
1099 | nsm.susp_fen = 0; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | if (what != NOTHING) { | |
1104 | spin_lock_irq(&mdev->tconn->req_lock); | |
2f5cdd0b | 1105 | _tl_restart(mdev->tconn, what); |
b8907339 PR |
1106 | nsm.i &= mdev->state.i; |
1107 | _drbd_set_state(mdev, nsm, CS_VERBOSE, NULL); | |
1108 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1109 | } | |
1110 | ||
1111 | /* Became sync source. With protocol >= 96, we still need to send out | |
1112 | * the sync uuid now. Need to do that before any drbd_send_state, or | |
1113 | * the other side may go "paused sync" before receiving the sync uuids, | |
1114 | * which is unexpected. */ | |
1115 | if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) && | |
1116 | (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) && | |
1117 | mdev->tconn->agreed_pro_version >= 96 && get_ldev(mdev)) { | |
1118 | drbd_gen_and_send_sync_uuid(mdev); | |
1119 | put_ldev(mdev); | |
1120 | } | |
1121 | ||
1122 | /* Do not change the order of the if above and the two below... */ | |
1123 | if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */ | |
1124 | drbd_send_uuids(mdev); | |
1125 | drbd_send_state(mdev); | |
1126 | } | |
1127 | /* No point in queuing send_bitmap if we don't have a connection | |
1128 | * anymore, so check also the _current_ state, not only the new state | |
1129 | * at the time this work was queued. */ | |
1130 | if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S && | |
1131 | mdev->state.conn == C_WF_BITMAP_S) | |
1132 | drbd_queue_bitmap_io(mdev, &drbd_send_bitmap, NULL, | |
1133 | "send_bitmap (WFBitMapS)", | |
1134 | BM_LOCKED_TEST_ALLOWED); | |
1135 | ||
1136 | /* Lost contact to peer's copy of the data */ | |
1137 | if ((os.pdsk >= D_INCONSISTENT && | |
1138 | os.pdsk != D_UNKNOWN && | |
1139 | os.pdsk != D_OUTDATED) | |
1140 | && (ns.pdsk < D_INCONSISTENT || | |
1141 | ns.pdsk == D_UNKNOWN || | |
1142 | ns.pdsk == D_OUTDATED)) { | |
1143 | if (get_ldev(mdev)) { | |
1144 | if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) && | |
1145 | mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { | |
1146 | if (is_susp(mdev->state)) { | |
1147 | set_bit(NEW_CUR_UUID, &mdev->flags); | |
1148 | } else { | |
1149 | drbd_uuid_new_current(mdev); | |
1150 | drbd_send_uuids(mdev); | |
1151 | } | |
1152 | } | |
1153 | put_ldev(mdev); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) { | |
1158 | if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) { | |
1159 | drbd_uuid_new_current(mdev); | |
1160 | drbd_send_uuids(mdev); | |
1161 | } | |
1162 | ||
1163 | /* D_DISKLESS Peer becomes secondary */ | |
1164 | if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY) | |
1165 | /* We may still be Primary ourselves. | |
1166 | * No harm done if the bitmap still changes, | |
1167 | * redirtied pages will follow later. */ | |
1168 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1169 | "demote diskless peer", BM_LOCKED_SET_ALLOWED); | |
1170 | put_ldev(mdev); | |
1171 | } | |
1172 | ||
1173 | /* Write out all changed bits on demote. | |
1174 | * Though, no need to da that just yet | |
1175 | * if there is a resync going on still */ | |
1176 | if (os.role == R_PRIMARY && ns.role == R_SECONDARY && | |
1177 | mdev->state.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1178 | /* No changes to the bitmap expected this time, so assert that, | |
1179 | * even though no harm was done if it did change. */ | |
1180 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1181 | "demote", BM_LOCKED_TEST_ALLOWED); | |
1182 | put_ldev(mdev); | |
1183 | } | |
1184 | ||
1185 | /* Last part of the attaching process ... */ | |
1186 | if (ns.conn >= C_CONNECTED && | |
1187 | os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) { | |
1188 | drbd_send_sizes(mdev, 0, 0); /* to start sync... */ | |
1189 | drbd_send_uuids(mdev); | |
1190 | drbd_send_state(mdev); | |
1191 | } | |
1192 | ||
1193 | /* We want to pause/continue resync, tell peer. */ | |
1194 | if (ns.conn >= C_CONNECTED && | |
1195 | ((os.aftr_isp != ns.aftr_isp) || | |
1196 | (os.user_isp != ns.user_isp))) | |
1197 | drbd_send_state(mdev); | |
1198 | ||
1199 | /* In case one of the isp bits got set, suspend other devices. */ | |
1200 | if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) && | |
1201 | (ns.aftr_isp || ns.peer_isp || ns.user_isp)) | |
1202 | suspend_other_sg(mdev); | |
1203 | ||
1204 | /* Make sure the peer gets informed about eventual state | |
1205 | changes (ISP bits) while we were in WFReportParams. */ | |
1206 | if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED) | |
1207 | drbd_send_state(mdev); | |
1208 | ||
1209 | if (os.conn != C_AHEAD && ns.conn == C_AHEAD) | |
1210 | drbd_send_state(mdev); | |
1211 | ||
1212 | /* We are in the progress to start a full sync... */ | |
1213 | if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
1214 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S)) | |
1215 | /* no other bitmap changes expected during this phase */ | |
1216 | drbd_queue_bitmap_io(mdev, | |
1217 | &drbd_bmio_set_n_write, &abw_start_sync, | |
1218 | "set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED); | |
1219 | ||
1220 | /* We are invalidating our self... */ | |
1221 | if (os.conn < C_CONNECTED && ns.conn < C_CONNECTED && | |
1222 | os.disk > D_INCONSISTENT && ns.disk == D_INCONSISTENT) | |
1223 | /* other bitmap operation expected during this phase */ | |
1224 | drbd_queue_bitmap_io(mdev, &drbd_bmio_set_n_write, NULL, | |
1225 | "set_n_write from invalidate", BM_LOCKED_MASK); | |
1226 | ||
1227 | /* first half of local IO error, failure to attach, | |
1228 | * or administrative detach */ | |
1229 | if (os.disk != D_FAILED && ns.disk == D_FAILED) { | |
1230 | enum drbd_io_error_p eh; | |
1231 | int was_io_error; | |
1232 | /* corresponding get_ldev was in __drbd_set_state, to serialize | |
1233 | * our cleanup here with the transition to D_DISKLESS, | |
1234 | * so it is safe to dreference ldev here. */ | |
1235 | eh = mdev->ldev->dc.on_io_error; | |
1236 | was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags); | |
1237 | ||
1238 | /* current state still has to be D_FAILED, | |
1239 | * there is only one way out: to D_DISKLESS, | |
1240 | * and that may only happen after our put_ldev below. */ | |
1241 | if (mdev->state.disk != D_FAILED) | |
1242 | dev_err(DEV, | |
1243 | "ASSERT FAILED: disk is %s during detach\n", | |
1244 | drbd_disk_str(mdev->state.disk)); | |
1245 | ||
927036f9 | 1246 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1247 | dev_warn(DEV, "Notified peer that I am detaching my disk\n"); |
1248 | else | |
1249 | dev_err(DEV, "Sending state for detaching disk failed\n"); | |
1250 | ||
1251 | drbd_rs_cancel_all(mdev); | |
1252 | ||
1253 | /* In case we want to get something to stable storage still, | |
1254 | * this may be the last chance. | |
1255 | * Following put_ldev may transition to D_DISKLESS. */ | |
1256 | drbd_md_sync(mdev); | |
1257 | put_ldev(mdev); | |
1258 | ||
1259 | if (was_io_error && eh == EP_CALL_HELPER) | |
1260 | drbd_khelper(mdev, "local-io-error"); | |
1261 | } | |
1262 | ||
1263 | /* second half of local IO error, failure to attach, | |
1264 | * or administrative detach, | |
1265 | * after local_cnt references have reached zero again */ | |
1266 | if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) { | |
1267 | /* We must still be diskless, | |
1268 | * re-attach has to be serialized with this! */ | |
1269 | if (mdev->state.disk != D_DISKLESS) | |
1270 | dev_err(DEV, | |
1271 | "ASSERT FAILED: disk is %s while going diskless\n", | |
1272 | drbd_disk_str(mdev->state.disk)); | |
1273 | ||
1274 | mdev->rs_total = 0; | |
1275 | mdev->rs_failed = 0; | |
1276 | atomic_set(&mdev->rs_pending_cnt, 0); | |
1277 | ||
927036f9 | 1278 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1279 | dev_warn(DEV, "Notified peer that I'm now diskless.\n"); |
1280 | /* corresponding get_ldev in __drbd_set_state | |
1281 | * this may finally trigger drbd_ldev_destroy. */ | |
1282 | put_ldev(mdev); | |
1283 | } | |
1284 | ||
1285 | /* Notify peer that I had a local IO error, and did not detached.. */ | |
1286 | if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT) | |
1287 | drbd_send_state(mdev); | |
1288 | ||
1289 | /* Disks got bigger while they were detached */ | |
1290 | if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING && | |
1291 | test_and_clear_bit(RESYNC_AFTER_NEG, &mdev->flags)) { | |
1292 | if (ns.conn == C_CONNECTED) | |
1293 | resync_after_online_grow(mdev); | |
1294 | } | |
1295 | ||
1296 | /* A resync finished or aborted, wake paused devices... */ | |
1297 | if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) || | |
1298 | (os.peer_isp && !ns.peer_isp) || | |
1299 | (os.user_isp && !ns.user_isp)) | |
1300 | resume_next_sg(mdev); | |
1301 | ||
1302 | /* sync target done with resync. Explicitly notify peer, even though | |
1303 | * it should (at least for non-empty resyncs) already know itself. */ | |
1304 | if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED) | |
1305 | drbd_send_state(mdev); | |
1306 | ||
1307 | /* This triggers bitmap writeout of potentially still unwritten pages | |
1308 | * if the resync finished cleanly, or aborted because of peer disk | |
1309 | * failure, or because of connection loss. | |
1310 | * For resync aborted because of local disk failure, we cannot do | |
1311 | * any bitmap writeout anymore. | |
1312 | * No harm done if some bits change during this phase. | |
1313 | */ | |
1314 | if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1315 | drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL, | |
1316 | "write from resync_finished", BM_LOCKED_SET_ALLOWED); | |
1317 | put_ldev(mdev); | |
1318 | } | |
1319 | ||
1320 | if (ns.disk == D_DISKLESS && | |
1321 | ns.conn == C_STANDALONE && | |
1322 | ns.role == R_SECONDARY) { | |
1323 | if (os.aftr_isp != ns.aftr_isp) | |
1324 | resume_next_sg(mdev); | |
1325 | } | |
1326 | ||
0e29d163 | 1327 | after_all_state_ch(mdev->tconn); |
bbeb641c | 1328 | |
b8907339 PR |
1329 | drbd_md_sync(mdev); |
1330 | } | |
1331 | ||
bbeb641c PR |
1332 | struct after_conn_state_chg_work { |
1333 | struct drbd_work w; | |
1334 | enum drbd_conns oc; | |
1335 | union drbd_state nms; /* new, max state, over all mdevs */ | |
1336 | enum chg_state_flags flags; | |
1337 | }; | |
1338 | ||
0e29d163 | 1339 | static void after_all_state_ch(struct drbd_tconn *tconn) |
b8907339 | 1340 | { |
0e29d163 PR |
1341 | if (conn_all_vols_unconf(tconn) && |
1342 | test_bit(OBJECT_DYING, &tconn->flags)) { | |
bbeb641c PR |
1343 | drbd_thread_stop_nowait(&tconn->worker); |
1344 | } | |
1345 | } | |
1346 | ||
99920dc5 | 1347 | static int w_after_conn_state_ch(struct drbd_work *w, int unused) |
bbeb641c PR |
1348 | { |
1349 | struct after_conn_state_chg_work *acscw = | |
1350 | container_of(w, struct after_conn_state_chg_work, w); | |
1351 | struct drbd_tconn *tconn = w->tconn; | |
1352 | enum drbd_conns oc = acscw->oc; | |
1353 | union drbd_state nms = acscw->nms; | |
1354 | ||
1355 | kfree(acscw); | |
1356 | ||
b8907339 | 1357 | /* Upon network configuration, we need to start the receiver */ |
bbeb641c | 1358 | if (oc == C_STANDALONE && nms.conn == C_UNCONNECTED) |
b8907339 PR |
1359 | drbd_thread_start(&tconn->receiver); |
1360 | ||
bbeb641c | 1361 | //conn_err(tconn, STATE_FMT, STATE_ARGS("nms", nms)); |
0e29d163 | 1362 | after_all_state_ch(tconn); |
bbeb641c | 1363 | |
99920dc5 | 1364 | return 0; |
bbeb641c PR |
1365 | } |
1366 | ||
1367 | static void print_conn_state_change(struct drbd_tconn *tconn, enum drbd_conns oc, enum drbd_conns nc) | |
1368 | { | |
1369 | char *pbp, pb[300]; | |
1370 | pbp = pb; | |
1371 | *pbp = 0; | |
1372 | if (nc != oc) | |
1373 | pbp += sprintf(pbp, "conn( %s -> %s ) ", | |
1374 | drbd_conn_str(oc), | |
1375 | drbd_conn_str(nc)); | |
1376 | ||
1377 | conn_info(tconn, "%s\n", pb); | |
1378 | } | |
1379 | ||
88ef594e PR |
1380 | enum sp_state { |
1381 | OC_UNINITIALIZED, | |
1382 | OC_CONSISTENT, | |
1383 | OC_INCONSISTENT, | |
1384 | } oc_state; | |
1385 | ||
1386 | static void common_state_part(enum sp_state *sps, int *sp, int nsp) | |
1387 | { | |
1388 | switch (*sps) { | |
1389 | case OC_UNINITIALIZED: | |
1390 | *sp = nsp; | |
1391 | *sps = OC_CONSISTENT; | |
1392 | break; | |
1393 | case OC_CONSISTENT: | |
1394 | if (*sp != nsp) | |
1395 | *sps = OC_INCONSISTENT; | |
1396 | break; | |
1397 | case OC_INCONSISTENT: | |
1398 | break; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, union drbd_state *pmask) | |
1403 | { | |
1404 | union drbd_state css = {}; /* common state state */ | |
1405 | union drbd_state os, cs = {}; /* old_state, common_state */ | |
1406 | union drbd_state mask = {}; | |
1407 | enum sp_state sps; /* state part state */ | |
1408 | int sp; /* state part */ | |
1409 | struct drbd_conf *mdev; | |
1410 | int vnr; | |
1411 | ||
1412 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
1413 | os = mdev->state; | |
1414 | ||
1415 | sps = css.role; | |
1416 | sp = cs.role; | |
1417 | common_state_part(&sps, &sp, os.role); | |
1418 | css.role = sps; | |
1419 | cs.role = sp; | |
1420 | ||
1421 | sps = css.peer; | |
1422 | sp = cs.peer; | |
1423 | common_state_part(&sps, &sp, os.peer); | |
1424 | css.peer = sps; | |
1425 | cs.peer = sp; | |
1426 | ||
1427 | sps = css.conn; | |
1428 | sp = cs.conn; | |
1429 | common_state_part(&sps, &sp, os.conn); | |
1430 | css.conn = sps; | |
1431 | cs.conn = sp; | |
1432 | ||
1433 | sps = css.disk; | |
1434 | sp = cs.disk; | |
1435 | common_state_part(&sps, &sp, os.disk); | |
1436 | css.disk = sps; | |
1437 | cs.disk = sp; | |
1438 | ||
1439 | sps = css.pdsk; | |
1440 | sp = cs.pdsk; | |
1441 | common_state_part(&sps, &sp, os.pdsk); | |
1442 | css.pdsk = sps; | |
1443 | cs.pdsk = sp; | |
1444 | } | |
1445 | ||
1446 | if (css.role == OC_CONSISTENT) | |
1447 | mask.role = R_MASK; | |
1448 | if (css.peer == OC_CONSISTENT) | |
1449 | mask.peer = R_MASK; | |
1450 | if (css.conn == OC_CONSISTENT) | |
1451 | mask.conn = C_MASK; | |
1452 | if (css.disk == OC_CONSISTENT) | |
1453 | mask.disk = D_MASK; | |
1454 | if (css.pdsk == OC_CONSISTENT) | |
1455 | mask.pdsk = D_MASK; | |
1456 | ||
1457 | *pcs = cs; | |
1458 | *pmask = mask; | |
1459 | } | |
bbeb641c | 1460 | |
bd0c824a PR |
1461 | static enum drbd_state_rv |
1462 | conn_is_valid_transition(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
88ef594e | 1463 | enum chg_state_flags flags) |
bbeb641c | 1464 | { |
bd0c824a | 1465 | enum drbd_state_rv rv = SS_SUCCESS; |
bbeb641c | 1466 | union drbd_state ns, os; |
bd0c824a PR |
1467 | struct drbd_conf *mdev; |
1468 | int vnr; | |
bbeb641c | 1469 | |
bd0c824a PR |
1470 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1471 | os = mdev->state; | |
1472 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); | |
1473 | ||
bd0c824a PR |
1474 | if (ns.i == os.i) |
1475 | continue; | |
bbeb641c | 1476 | |
bd0c824a PR |
1477 | rv = is_valid_transition(os, ns); |
1478 | if (rv < SS_SUCCESS) | |
1479 | break; | |
1480 | ||
1481 | if (!(flags & CS_HARD)) { | |
1482 | rv = is_valid_state(mdev, ns); | |
1483 | if (rv < SS_SUCCESS) { | |
1484 | if (is_valid_state(mdev, os) == rv) | |
1485 | rv = is_valid_soft_transition(os, ns); | |
1486 | } else | |
1487 | rv = is_valid_soft_transition(os, ns); | |
1488 | } | |
1489 | if (rv < SS_SUCCESS) | |
1490 | break; | |
bbeb641c PR |
1491 | } |
1492 | ||
bd0c824a PR |
1493 | if (rv < SS_SUCCESS && flags & CS_VERBOSE) |
1494 | print_st_err(mdev, os, ns, rv); | |
1495 | ||
1496 | return rv; | |
bbeb641c PR |
1497 | } |
1498 | ||
bd0c824a PR |
1499 | static union drbd_state |
1500 | conn_set_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1501 | enum chg_state_flags flags) | |
bbeb641c | 1502 | { |
bd0c824a PR |
1503 | union drbd_state ns, os, ms = { }; |
1504 | struct drbd_conf *mdev; | |
bbeb641c | 1505 | enum drbd_state_rv rv; |
bd0c824a | 1506 | int vnr; |
bbeb641c | 1507 | |
bd0c824a PR |
1508 | if (mask.conn == C_MASK) |
1509 | tconn->cstate = val.conn; | |
1510 | ||
1511 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
1512 | os = mdev->state; | |
1513 | ns = apply_mask_val(os, mask, val); | |
1514 | ns = sanitize_state(mdev, ns, NULL); | |
bbeb641c | 1515 | |
bd0c824a PR |
1516 | rv = __drbd_set_state(mdev, ns, flags, NULL); |
1517 | if (rv < SS_SUCCESS) | |
1518 | BUG(); | |
bbeb641c | 1519 | |
bd0c824a PR |
1520 | ms.role = max_role(mdev->state.role, ms.role); |
1521 | ms.peer = max_role(mdev->state.peer, ms.peer); | |
1522 | ms.disk = max_t(enum drbd_disk_state, mdev->state.disk, ms.disk); | |
1523 | ms.pdsk = max_t(enum drbd_disk_state, mdev->state.pdsk, ms.pdsk); | |
1524 | } | |
bbeb641c | 1525 | |
bd0c824a | 1526 | return ms; |
bbeb641c PR |
1527 | } |
1528 | ||
df24aa45 PR |
1529 | static enum drbd_state_rv |
1530 | _conn_rq_cond(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val) | |
1531 | { | |
df24aa45 PR |
1532 | enum drbd_state_rv rv; |
1533 | ||
1534 | if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &tconn->flags)) | |
1535 | return SS_CW_SUCCESS; | |
1536 | ||
1537 | if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &tconn->flags)) | |
1538 | return SS_CW_FAILED_BY_PEER; | |
1539 | ||
df24aa45 PR |
1540 | spin_lock_irq(&tconn->req_lock); |
1541 | rv = tconn->cstate != C_WF_REPORT_PARAMS ? SS_CW_NO_NEED : SS_UNKNOWN_ERROR; | |
1542 | ||
1543 | if (rv == SS_UNKNOWN_ERROR) | |
88ef594e | 1544 | rv = conn_is_valid_transition(tconn, mask, val, CS_NO_CSTATE_CHG); |
df24aa45 | 1545 | |
bd0c824a PR |
1546 | if (rv == SS_SUCCESS) |
1547 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
df24aa45 PR |
1548 | |
1549 | spin_unlock_irq(&tconn->req_lock); | |
1550 | ||
1551 | return rv; | |
1552 | } | |
1553 | ||
1554 | static enum drbd_state_rv | |
1555 | conn_cl_wide(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1556 | enum chg_state_flags f) | |
1557 | { | |
1558 | enum drbd_state_rv rv; | |
1559 | ||
1560 | spin_unlock_irq(&tconn->req_lock); | |
1561 | mutex_lock(&tconn->cstate_mutex); | |
1562 | ||
caee1c3a | 1563 | if (conn_send_state_req(tconn, mask, val)) { |
df24aa45 PR |
1564 | rv = SS_CW_FAILED_BY_PEER; |
1565 | /* if (f & CS_VERBOSE) | |
1566 | print_st_err(mdev, os, ns, rv); */ | |
1567 | goto abort; | |
1568 | } | |
1569 | ||
1570 | wait_event(tconn->ping_wait, (rv = _conn_rq_cond(tconn, mask, val))); | |
1571 | ||
1572 | abort: | |
1573 | mutex_unlock(&tconn->cstate_mutex); | |
1574 | spin_lock_irq(&tconn->req_lock); | |
1575 | ||
1576 | return rv; | |
1577 | } | |
1578 | ||
bbeb641c PR |
1579 | enum drbd_state_rv |
1580 | _conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1581 | enum chg_state_flags flags) | |
1582 | { | |
1583 | enum drbd_state_rv rv = SS_SUCCESS; | |
bbeb641c PR |
1584 | struct after_conn_state_chg_work *acscw; |
1585 | enum drbd_conns oc = tconn->cstate; | |
88ef594e | 1586 | union drbd_state ms, os_val, os_mask; |
bbeb641c | 1587 | |
bbeb641c PR |
1588 | rv = is_valid_conn_transition(oc, val.conn); |
1589 | if (rv < SS_SUCCESS) | |
1590 | goto abort; | |
1591 | ||
88ef594e | 1592 | rv = conn_is_valid_transition(tconn, mask, val, flags); |
bbeb641c PR |
1593 | if (rv < SS_SUCCESS) |
1594 | goto abort; | |
1595 | ||
df24aa45 PR |
1596 | if (oc == C_WF_REPORT_PARAMS && val.conn == C_DISCONNECTING && |
1597 | !(flags & (CS_LOCAL_ONLY | CS_HARD))) { | |
1598 | rv = conn_cl_wide(tconn, mask, val, flags); | |
1599 | if (rv < SS_SUCCESS) | |
1600 | goto abort; | |
1601 | } | |
1602 | ||
88ef594e PR |
1603 | conn_old_common_state(tconn, &os_val, &os_mask); |
1604 | if (os_mask.conn == C_MASK) { | |
1605 | oc = os_val.conn; | |
bbeb641c | 1606 | print_conn_state_change(tconn, oc, val.conn); |
bd0c824a | 1607 | flags |= CS_NO_CSTATE_CHG; |
bbeb641c | 1608 | } |
bd0c824a PR |
1609 | |
1610 | ms = conn_set_state(tconn, mask, val, flags); | |
1611 | ms.conn = val.conn; | |
bbeb641c PR |
1612 | |
1613 | acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC); | |
1614 | if (acscw) { | |
1615 | acscw->oc = oc; | |
bd0c824a | 1616 | acscw->nms = ms; |
bbeb641c PR |
1617 | acscw->flags = flags; |
1618 | acscw->w.cb = w_after_conn_state_ch; | |
1619 | acscw->w.tconn = tconn; | |
1620 | drbd_queue_work(&tconn->data.work, &acscw->w); | |
1621 | } else { | |
1622 | conn_err(tconn, "Could not kmalloc an acscw\n"); | |
b8907339 | 1623 | } |
bbeb641c PR |
1624 | |
1625 | abort: | |
bbeb641c PR |
1626 | return rv; |
1627 | } | |
1628 | ||
1629 | enum drbd_state_rv | |
1630 | conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1631 | enum chg_state_flags flags) | |
1632 | { | |
1633 | enum drbd_state_rv rv; | |
1634 | ||
1635 | spin_lock_irq(&tconn->req_lock); | |
1636 | rv = _conn_request_state(tconn, mask, val, flags); | |
1637 | spin_unlock_irq(&tconn->req_lock); | |
1638 | ||
1639 | return rv; | |
b8907339 | 1640 | } |