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