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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 | |
2aebfabb PR |
50 | static inline bool is_susp(union drbd_state s) |
51 | { | |
52 | return s.susp || s.susp_nod || s.susp_fen; | |
53 | } | |
54 | ||
d0456c72 | 55 | bool conn_all_vols_unconf(struct drbd_tconn *tconn) |
0e29d163 PR |
56 | { |
57 | struct drbd_conf *mdev; | |
e90285e0 | 58 | int vnr; |
0e29d163 | 59 | |
e90285e0 | 60 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
d0456c72 LE |
61 | if (mdev->state.disk != D_DISKLESS || |
62 | mdev->state.conn != C_STANDALONE || | |
63 | mdev->state.role != R_SECONDARY) | |
64 | return false; | |
0e29d163 | 65 | } |
d0456c72 | 66 | return true; |
0e29d163 PR |
67 | } |
68 | ||
cb703454 PR |
69 | /* Unfortunately the states where not correctly ordered, when |
70 | they where defined. therefore can not use max_t() here. */ | |
71 | static enum drbd_role max_role(enum drbd_role role1, enum drbd_role role2) | |
72 | { | |
73 | if (role1 == R_PRIMARY || role2 == R_PRIMARY) | |
74 | return R_PRIMARY; | |
75 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
76 | return R_SECONDARY; | |
77 | return R_UNKNOWN; | |
78 | } | |
79 | static enum drbd_role min_role(enum drbd_role role1, enum drbd_role role2) | |
80 | { | |
81 | if (role1 == R_UNKNOWN || role2 == R_UNKNOWN) | |
82 | return R_UNKNOWN; | |
83 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
84 | return R_SECONDARY; | |
85 | return R_PRIMARY; | |
86 | } | |
87 | ||
88 | enum drbd_role conn_highest_role(struct drbd_tconn *tconn) | |
89 | { | |
90 | enum drbd_role role = R_UNKNOWN; | |
91 | struct drbd_conf *mdev; | |
92 | int vnr; | |
93 | ||
94 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
95 | role = max_role(role, mdev->state.role); | |
96 | ||
97 | return role; | |
98 | } | |
99 | ||
100 | enum drbd_role conn_highest_peer(struct drbd_tconn *tconn) | |
101 | { | |
102 | enum drbd_role peer = R_UNKNOWN; | |
103 | struct drbd_conf *mdev; | |
104 | int vnr; | |
105 | ||
106 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
107 | peer = max_role(peer, mdev->state.peer); | |
108 | ||
109 | return peer; | |
110 | } | |
111 | ||
112 | enum drbd_disk_state conn_highest_disk(struct drbd_tconn *tconn) | |
113 | { | |
114 | enum drbd_disk_state ds = D_DISKLESS; | |
115 | struct drbd_conf *mdev; | |
116 | int vnr; | |
117 | ||
118 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
119 | ds = max_t(enum drbd_disk_state, ds, mdev->state.disk); | |
120 | ||
121 | return ds; | |
122 | } | |
123 | ||
124 | enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn) | |
125 | { | |
126 | enum drbd_disk_state ds = D_DISKLESS; | |
127 | struct drbd_conf *mdev; | |
128 | int vnr; | |
129 | ||
130 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
131 | ds = max_t(enum drbd_disk_state, ds, mdev->state.pdsk); | |
132 | ||
133 | return ds; | |
134 | } | |
135 | ||
b8907339 PR |
136 | /** |
137 | * cl_wide_st_chg() - true if the state change is a cluster wide one | |
138 | * @mdev: DRBD device. | |
139 | * @os: old (current) state. | |
140 | * @ns: new (wanted) state. | |
141 | */ | |
142 | static int cl_wide_st_chg(struct drbd_conf *mdev, | |
143 | union drbd_state os, union drbd_state ns) | |
144 | { | |
145 | return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED && | |
146 | ((os.role != R_PRIMARY && ns.role == R_PRIMARY) || | |
147 | (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
148 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) || | |
149 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))) || | |
150 | (os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) || | |
151 | (os.conn == C_CONNECTED && ns.conn == C_VERIFY_S); | |
152 | } | |
153 | ||
56707f9e PR |
154 | static union drbd_state |
155 | apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val) | |
156 | { | |
157 | union drbd_state ns; | |
158 | ns.i = (os.i & ~mask.i) | val.i; | |
159 | return ns; | |
160 | } | |
161 | ||
b8907339 PR |
162 | enum drbd_state_rv |
163 | drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f, | |
164 | union drbd_state mask, union drbd_state val) | |
165 | { | |
166 | unsigned long flags; | |
56707f9e | 167 | union drbd_state ns; |
b8907339 PR |
168 | enum drbd_state_rv rv; |
169 | ||
170 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 171 | ns = apply_mask_val(drbd_read_state(mdev), mask, val); |
b8907339 | 172 | rv = _drbd_set_state(mdev, ns, f, NULL); |
b8907339 PR |
173 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); |
174 | ||
175 | return rv; | |
176 | } | |
177 | ||
178 | /** | |
179 | * drbd_force_state() - Impose a change which happens outside our control on our state | |
180 | * @mdev: DRBD device. | |
181 | * @mask: mask of state bits to change. | |
182 | * @val: value of new state bits. | |
183 | */ | |
184 | void drbd_force_state(struct drbd_conf *mdev, | |
185 | union drbd_state mask, union drbd_state val) | |
186 | { | |
187 | drbd_change_state(mdev, CS_HARD, mask, val); | |
188 | } | |
189 | ||
190 | static enum drbd_state_rv | |
191 | _req_st_cond(struct drbd_conf *mdev, union drbd_state mask, | |
192 | union drbd_state val) | |
193 | { | |
194 | union drbd_state os, ns; | |
195 | unsigned long flags; | |
196 | enum drbd_state_rv rv; | |
197 | ||
198 | if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &mdev->flags)) | |
199 | return SS_CW_SUCCESS; | |
200 | ||
201 | if (test_and_clear_bit(CL_ST_CHG_FAIL, &mdev->flags)) | |
202 | return SS_CW_FAILED_BY_PEER; | |
203 | ||
b8907339 | 204 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); |
78bae59b | 205 | os = drbd_read_state(mdev); |
56707f9e | 206 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d PR |
207 | rv = is_valid_transition(os, ns); |
208 | if (rv == SS_SUCCESS) | |
209 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
b8907339 PR |
210 | |
211 | if (!cl_wide_st_chg(mdev, os, ns)) | |
212 | rv = SS_CW_NO_NEED; | |
3509502d | 213 | if (rv == SS_UNKNOWN_ERROR) { |
b8907339 PR |
214 | rv = is_valid_state(mdev, ns); |
215 | if (rv == SS_SUCCESS) { | |
a75f34ad | 216 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
217 | if (rv == SS_SUCCESS) |
218 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
219 | } | |
220 | } | |
221 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
222 | ||
223 | return rv; | |
224 | } | |
225 | ||
226 | /** | |
227 | * drbd_req_state() - Perform an eventually cluster wide state change | |
228 | * @mdev: DRBD device. | |
229 | * @mask: mask of state bits to change. | |
230 | * @val: value of new state bits. | |
231 | * @f: flags | |
232 | * | |
233 | * Should not be called directly, use drbd_request_state() or | |
234 | * _drbd_request_state(). | |
235 | */ | |
236 | static enum drbd_state_rv | |
237 | drbd_req_state(struct drbd_conf *mdev, union drbd_state mask, | |
238 | union drbd_state val, enum chg_state_flags f) | |
239 | { | |
240 | struct completion done; | |
241 | unsigned long flags; | |
242 | union drbd_state os, ns; | |
243 | enum drbd_state_rv rv; | |
244 | ||
245 | init_completion(&done); | |
246 | ||
247 | if (f & CS_SERIALIZE) | |
8410da8f | 248 | mutex_lock(mdev->state_mutex); |
b8907339 PR |
249 | |
250 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 251 | os = drbd_read_state(mdev); |
56707f9e | 252 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d | 253 | rv = is_valid_transition(os, ns); |
3c5e5f6a LE |
254 | if (rv < SS_SUCCESS) { |
255 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
3509502d | 256 | goto abort; |
3c5e5f6a | 257 | } |
b8907339 PR |
258 | |
259 | if (cl_wide_st_chg(mdev, os, ns)) { | |
260 | rv = is_valid_state(mdev, ns); | |
261 | if (rv == SS_SUCCESS) | |
a75f34ad | 262 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
263 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); |
264 | ||
265 | if (rv < SS_SUCCESS) { | |
266 | if (f & CS_VERBOSE) | |
267 | print_st_err(mdev, os, ns, rv); | |
268 | goto abort; | |
269 | } | |
270 | ||
d24ae219 | 271 | if (drbd_send_state_req(mdev, mask, val)) { |
b8907339 PR |
272 | rv = SS_CW_FAILED_BY_PEER; |
273 | if (f & CS_VERBOSE) | |
274 | print_st_err(mdev, os, ns, rv); | |
275 | goto abort; | |
276 | } | |
277 | ||
278 | wait_event(mdev->state_wait, | |
279 | (rv = _req_st_cond(mdev, mask, val))); | |
280 | ||
281 | if (rv < SS_SUCCESS) { | |
b8907339 PR |
282 | if (f & CS_VERBOSE) |
283 | print_st_err(mdev, os, ns, rv); | |
284 | goto abort; | |
285 | } | |
286 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 287 | ns = apply_mask_val(drbd_read_state(mdev), mask, val); |
b8907339 | 288 | rv = _drbd_set_state(mdev, ns, f, &done); |
b8907339 PR |
289 | } else { |
290 | rv = _drbd_set_state(mdev, ns, f, &done); | |
291 | } | |
292 | ||
293 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
294 | ||
295 | if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) { | |
296 | D_ASSERT(current != mdev->tconn->worker.task); | |
297 | wait_for_completion(&done); | |
298 | } | |
299 | ||
300 | abort: | |
301 | if (f & CS_SERIALIZE) | |
8410da8f | 302 | mutex_unlock(mdev->state_mutex); |
b8907339 PR |
303 | |
304 | return rv; | |
305 | } | |
306 | ||
307 | /** | |
308 | * _drbd_request_state() - Request a state change (with flags) | |
309 | * @mdev: DRBD device. | |
310 | * @mask: mask of state bits to change. | |
311 | * @val: value of new state bits. | |
312 | * @f: flags | |
313 | * | |
314 | * Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE | |
315 | * flag, or when logging of failed state change requests is not desired. | |
316 | */ | |
317 | enum drbd_state_rv | |
318 | _drbd_request_state(struct drbd_conf *mdev, union drbd_state mask, | |
319 | union drbd_state val, enum chg_state_flags f) | |
320 | { | |
321 | enum drbd_state_rv rv; | |
322 | ||
323 | wait_event(mdev->state_wait, | |
324 | (rv = drbd_req_state(mdev, mask, val, f)) != SS_IN_TRANSIENT_STATE); | |
325 | ||
326 | return rv; | |
327 | } | |
328 | ||
329 | static void print_st(struct drbd_conf *mdev, char *name, union drbd_state ns) | |
330 | { | |
331 | dev_err(DEV, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n", | |
332 | name, | |
333 | drbd_conn_str(ns.conn), | |
334 | drbd_role_str(ns.role), | |
335 | drbd_role_str(ns.peer), | |
336 | drbd_disk_str(ns.disk), | |
337 | drbd_disk_str(ns.pdsk), | |
338 | is_susp(ns) ? 's' : 'r', | |
339 | ns.aftr_isp ? 'a' : '-', | |
340 | ns.peer_isp ? 'p' : '-', | |
341 | ns.user_isp ? 'u' : '-', | |
342 | ns.susp_fen ? 'F' : '-', | |
343 | ns.susp_nod ? 'N' : '-' | |
344 | ); | |
345 | } | |
346 | ||
347 | void print_st_err(struct drbd_conf *mdev, union drbd_state os, | |
348 | union drbd_state ns, enum drbd_state_rv err) | |
349 | { | |
350 | if (err == SS_IN_TRANSIENT_STATE) | |
351 | return; | |
352 | dev_err(DEV, "State change failed: %s\n", drbd_set_st_err_str(err)); | |
353 | print_st(mdev, " state", os); | |
354 | print_st(mdev, "wanted", ns); | |
355 | } | |
356 | ||
435693e8 | 357 | static long print_state_change(char *pb, union drbd_state os, union drbd_state ns, |
bbeb641c PR |
358 | enum chg_state_flags flags) |
359 | { | |
435693e8 | 360 | char *pbp; |
bbeb641c PR |
361 | pbp = pb; |
362 | *pbp = 0; | |
435693e8 | 363 | if (ns.role != os.role && flags & CS_DC_ROLE) |
bbeb641c PR |
364 | pbp += sprintf(pbp, "role( %s -> %s ) ", |
365 | drbd_role_str(os.role), | |
366 | drbd_role_str(ns.role)); | |
435693e8 | 367 | if (ns.peer != os.peer && flags & CS_DC_PEER) |
bbeb641c PR |
368 | pbp += sprintf(pbp, "peer( %s -> %s ) ", |
369 | drbd_role_str(os.peer), | |
370 | drbd_role_str(ns.peer)); | |
435693e8 | 371 | if (ns.conn != os.conn && flags & CS_DC_CONN) |
bbeb641c PR |
372 | pbp += sprintf(pbp, "conn( %s -> %s ) ", |
373 | drbd_conn_str(os.conn), | |
374 | drbd_conn_str(ns.conn)); | |
435693e8 | 375 | if (ns.disk != os.disk && flags & CS_DC_DISK) |
bbeb641c PR |
376 | pbp += sprintf(pbp, "disk( %s -> %s ) ", |
377 | drbd_disk_str(os.disk), | |
378 | drbd_disk_str(ns.disk)); | |
435693e8 | 379 | if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK) |
bbeb641c PR |
380 | pbp += sprintf(pbp, "pdsk( %s -> %s ) ", |
381 | drbd_disk_str(os.pdsk), | |
382 | drbd_disk_str(ns.pdsk)); | |
383 | if (is_susp(ns) != is_susp(os)) | |
384 | pbp += sprintf(pbp, "susp( %d -> %d ) ", | |
385 | is_susp(os), | |
386 | is_susp(ns)); | |
387 | if (ns.aftr_isp != os.aftr_isp) | |
388 | pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ", | |
389 | os.aftr_isp, | |
390 | ns.aftr_isp); | |
391 | if (ns.peer_isp != os.peer_isp) | |
392 | pbp += sprintf(pbp, "peer_isp( %d -> %d ) ", | |
393 | os.peer_isp, | |
394 | ns.peer_isp); | |
395 | if (ns.user_isp != os.user_isp) | |
396 | pbp += sprintf(pbp, "user_isp( %d -> %d ) ", | |
397 | os.user_isp, | |
398 | ns.user_isp); | |
435693e8 PR |
399 | |
400 | return pbp - pb; | |
401 | } | |
402 | ||
403 | static void drbd_pr_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns, | |
404 | enum chg_state_flags flags) | |
405 | { | |
406 | char pb[300]; | |
407 | ||
408 | if (print_state_change(pb, os, ns, flags ^ CS_DC_MASK)) | |
bbeb641c PR |
409 | dev_info(DEV, "%s\n", pb); |
410 | } | |
b8907339 | 411 | |
435693e8 PR |
412 | static void conn_pr_state_change(struct drbd_tconn *tconn, union drbd_state os, union drbd_state ns, |
413 | enum chg_state_flags flags) | |
414 | { | |
415 | char pb[300]; | |
416 | ||
417 | if (print_state_change(pb, os, ns, flags)) | |
418 | conn_info(tconn, "%s\n", pb); | |
419 | } | |
420 | ||
421 | ||
b8907339 PR |
422 | /** |
423 | * is_valid_state() - Returns an SS_ error code if ns is not valid | |
424 | * @mdev: DRBD device. | |
425 | * @ns: State to consider. | |
426 | */ | |
427 | static enum drbd_state_rv | |
428 | is_valid_state(struct drbd_conf *mdev, union drbd_state ns) | |
429 | { | |
430 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
431 | ||
432 | enum drbd_fencing_p fp; | |
433 | enum drbd_state_rv rv = SS_SUCCESS; | |
434 | ||
435 | fp = FP_DONT_CARE; | |
436 | if (get_ldev(mdev)) { | |
437 | fp = mdev->ldev->dc.fencing; | |
438 | put_ldev(mdev); | |
439 | } | |
440 | ||
441 | if (get_net_conf(mdev->tconn)) { | |
047e95e2 PR |
442 | if (!mdev->tconn->net_conf->two_primaries && ns.role == R_PRIMARY) { |
443 | if (ns.peer == R_PRIMARY) | |
444 | rv = SS_TWO_PRIMARIES; | |
cb703454 | 445 | else if (conn_highest_peer(mdev->tconn) == R_PRIMARY) |
047e95e2 PR |
446 | rv = SS_O_VOL_PEER_PRI; |
447 | } | |
b8907339 PR |
448 | put_net_conf(mdev->tconn); |
449 | } | |
450 | ||
451 | if (rv <= 0) | |
452 | /* already found a reason to abort */; | |
453 | else if (ns.role == R_SECONDARY && mdev->open_cnt) | |
454 | rv = SS_DEVICE_IN_USE; | |
455 | ||
456 | else if (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.disk < D_UP_TO_DATE) | |
457 | rv = SS_NO_UP_TO_DATE_DISK; | |
458 | ||
459 | else if (fp >= FP_RESOURCE && | |
460 | ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk >= D_UNKNOWN) | |
461 | rv = SS_PRIMARY_NOP; | |
462 | ||
463 | else if (ns.role == R_PRIMARY && ns.disk <= D_INCONSISTENT && ns.pdsk <= D_INCONSISTENT) | |
464 | rv = SS_NO_UP_TO_DATE_DISK; | |
465 | ||
466 | else if (ns.conn > C_CONNECTED && ns.disk < D_INCONSISTENT) | |
467 | rv = SS_NO_LOCAL_DISK; | |
468 | ||
469 | else if (ns.conn > C_CONNECTED && ns.pdsk < D_INCONSISTENT) | |
470 | rv = SS_NO_REMOTE_DISK; | |
471 | ||
472 | else if (ns.conn > C_CONNECTED && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) | |
473 | rv = SS_NO_UP_TO_DATE_DISK; | |
474 | ||
475 | else if ((ns.conn == C_CONNECTED || | |
476 | ns.conn == C_WF_BITMAP_S || | |
477 | ns.conn == C_SYNC_SOURCE || | |
478 | ns.conn == C_PAUSED_SYNC_S) && | |
479 | ns.disk == D_OUTDATED) | |
480 | rv = SS_CONNECTED_OUTDATES; | |
481 | ||
482 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
f399002e | 483 | (mdev->tconn->net_conf->verify_alg[0] == 0)) |
b8907339 PR |
484 | rv = SS_NO_VERIFY_ALG; |
485 | ||
486 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
487 | mdev->tconn->agreed_pro_version < 88) | |
488 | rv = SS_NOT_SUPPORTED; | |
489 | ||
490 | else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN) | |
491 | rv = SS_CONNECTED_OUTDATES; | |
492 | ||
493 | return rv; | |
494 | } | |
495 | ||
496 | /** | |
a75f34ad | 497 | * is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible |
3509502d PR |
498 | * This function limits state transitions that may be declined by DRBD. I.e. |
499 | * user requests (aka soft transitions). | |
b8907339 PR |
500 | * @mdev: DRBD device. |
501 | * @ns: new state. | |
502 | * @os: old state. | |
503 | */ | |
504 | static enum drbd_state_rv | |
a75f34ad | 505 | is_valid_soft_transition(union drbd_state os, union drbd_state ns) |
b8907339 PR |
506 | { |
507 | enum drbd_state_rv rv = SS_SUCCESS; | |
508 | ||
509 | if ((ns.conn == C_STARTING_SYNC_T || ns.conn == C_STARTING_SYNC_S) && | |
510 | os.conn > C_CONNECTED) | |
511 | rv = SS_RESYNC_RUNNING; | |
512 | ||
513 | if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE) | |
514 | rv = SS_ALREADY_STANDALONE; | |
515 | ||
516 | if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS) | |
517 | rv = SS_IS_DISKLESS; | |
518 | ||
519 | if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED) | |
520 | rv = SS_NO_NET_CONFIG; | |
521 | ||
522 | if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING) | |
523 | rv = SS_LOWER_THAN_OUTDATED; | |
524 | ||
525 | if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED) | |
526 | rv = SS_IN_TRANSIENT_STATE; | |
527 | ||
2325eb66 PR |
528 | /* if (ns.conn == os.conn && ns.conn == C_WF_REPORT_PARAMS) |
529 | rv = SS_IN_TRANSIENT_STATE; */ | |
b8907339 PR |
530 | |
531 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED) | |
532 | rv = SS_NEED_CONNECTION; | |
533 | ||
534 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
535 | ns.conn != os.conn && os.conn > C_CONNECTED) | |
536 | rv = SS_RESYNC_RUNNING; | |
537 | ||
538 | if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) && | |
539 | os.conn < C_CONNECTED) | |
540 | rv = SS_NEED_CONNECTION; | |
541 | ||
542 | if ((ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE) | |
543 | && os.conn < C_WF_REPORT_PARAMS) | |
544 | rv = SS_NEED_CONNECTION; /* No NetworkFailure -> SyncTarget etc... */ | |
545 | ||
546 | return rv; | |
547 | } | |
548 | ||
3509502d | 549 | static enum drbd_state_rv |
fda74117 | 550 | is_valid_conn_transition(enum drbd_conns oc, enum drbd_conns nc) |
3509502d PR |
551 | { |
552 | enum drbd_state_rv rv = SS_SUCCESS; | |
553 | ||
554 | /* Disallow Network errors to configure a device's network part */ | |
fda74117 | 555 | if ((nc >= C_TIMEOUT && nc <= C_TEAR_DOWN) && oc <= C_DISCONNECTING) |
3509502d PR |
556 | rv = SS_NEED_CONNECTION; |
557 | ||
558 | /* After a network error only C_UNCONNECTED or C_DISCONNECTING may follow. */ | |
fda74117 | 559 | if (oc >= C_TIMEOUT && oc <= C_TEAR_DOWN && nc != C_UNCONNECTED && nc != C_DISCONNECTING) |
3509502d PR |
560 | rv = SS_IN_TRANSIENT_STATE; |
561 | ||
562 | /* After C_DISCONNECTING only C_STANDALONE may follow */ | |
fda74117 | 563 | if (oc == C_DISCONNECTING && nc != C_STANDALONE) |
3509502d PR |
564 | rv = SS_IN_TRANSIENT_STATE; |
565 | ||
fda74117 PR |
566 | return rv; |
567 | } | |
568 | ||
569 | ||
570 | /** | |
571 | * is_valid_transition() - Returns an SS_ error code if the state transition is not possible | |
572 | * This limits hard state transitions. Hard state transitions are facts there are | |
573 | * imposed on DRBD by the environment. E.g. disk broke or network broke down. | |
574 | * But those hard state transitions are still not allowed to do everything. | |
575 | * @ns: new state. | |
576 | * @os: old state. | |
577 | */ | |
578 | static enum drbd_state_rv | |
579 | is_valid_transition(union drbd_state os, union drbd_state ns) | |
580 | { | |
581 | enum drbd_state_rv rv; | |
582 | ||
583 | rv = is_valid_conn_transition(os.conn, ns.conn); | |
584 | ||
3509502d PR |
585 | /* we cannot fail (again) if we already detached */ |
586 | if (ns.disk == D_FAILED && os.disk == D_DISKLESS) | |
587 | rv = SS_IS_DISKLESS; | |
588 | ||
4308a0a3 PR |
589 | /* if we are only D_ATTACHING yet, |
590 | * we can (and should) go directly to D_DISKLESS. */ | |
591 | if (ns.disk == D_FAILED && os.disk == D_ATTACHING) { | |
592 | printk("TODO: FIX ME\n"); | |
593 | rv = SS_IS_DISKLESS; | |
594 | } | |
595 | ||
3509502d PR |
596 | return rv; |
597 | } | |
598 | ||
b8907339 PR |
599 | /** |
600 | * sanitize_state() - Resolves implicitly necessary additional changes to a state transition | |
601 | * @mdev: DRBD device. | |
602 | * @os: old state. | |
603 | * @ns: new state. | |
604 | * @warn_sync_abort: | |
605 | * | |
606 | * When we loose connection, we have to set the state of the peers disk (pdsk) | |
607 | * to D_UNKNOWN. This rule and many more along those lines are in this function. | |
608 | */ | |
4308a0a3 PR |
609 | static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns, |
610 | const char **warn_sync_abort) | |
b8907339 PR |
611 | { |
612 | enum drbd_fencing_p fp; | |
613 | enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max; | |
614 | ||
615 | fp = FP_DONT_CARE; | |
616 | if (get_ldev(mdev)) { | |
617 | fp = mdev->ldev->dc.fencing; | |
618 | put_ldev(mdev); | |
619 | } | |
620 | ||
3509502d | 621 | /* Implications from connection to peer and peer_isp */ |
b8907339 PR |
622 | if (ns.conn < C_CONNECTED) { |
623 | ns.peer_isp = 0; | |
624 | ns.peer = R_UNKNOWN; | |
625 | if (ns.pdsk > D_UNKNOWN || ns.pdsk < D_INCONSISTENT) | |
626 | ns.pdsk = D_UNKNOWN; | |
627 | } | |
628 | ||
629 | /* Clear the aftr_isp when becoming unconfigured */ | |
630 | if (ns.conn == C_STANDALONE && ns.disk == D_DISKLESS && ns.role == R_SECONDARY) | |
631 | ns.aftr_isp = 0; | |
632 | ||
4308a0a3 | 633 | /* An implication of the disk states onto the connection state */ |
b8907339 | 634 | /* Abort resync if a disk fails/detaches */ |
4308a0a3 | 635 | if (ns.conn > C_CONNECTED && (ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) { |
b8907339 PR |
636 | if (warn_sync_abort) |
637 | *warn_sync_abort = | |
4308a0a3 | 638 | ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ? |
b8907339 PR |
639 | "Online-verify" : "Resync"; |
640 | ns.conn = C_CONNECTED; | |
641 | } | |
642 | ||
643 | /* Connection breaks down before we finished "Negotiating" */ | |
644 | if (ns.conn < C_CONNECTED && ns.disk == D_NEGOTIATING && | |
645 | get_ldev_if_state(mdev, D_NEGOTIATING)) { | |
646 | if (mdev->ed_uuid == mdev->ldev->md.uuid[UI_CURRENT]) { | |
647 | ns.disk = mdev->new_state_tmp.disk; | |
648 | ns.pdsk = mdev->new_state_tmp.pdsk; | |
649 | } else { | |
650 | dev_alert(DEV, "Connection lost while negotiating, no data!\n"); | |
651 | ns.disk = D_DISKLESS; | |
652 | ns.pdsk = D_UNKNOWN; | |
653 | } | |
654 | put_ldev(mdev); | |
655 | } | |
656 | ||
657 | /* D_CONSISTENT and D_OUTDATED vanish when we get connected */ | |
658 | if (ns.conn >= C_CONNECTED && ns.conn < C_AHEAD) { | |
659 | if (ns.disk == D_CONSISTENT || ns.disk == D_OUTDATED) | |
660 | ns.disk = D_UP_TO_DATE; | |
661 | if (ns.pdsk == D_CONSISTENT || ns.pdsk == D_OUTDATED) | |
662 | ns.pdsk = D_UP_TO_DATE; | |
663 | } | |
664 | ||
665 | /* Implications of the connection stat on the disk states */ | |
666 | disk_min = D_DISKLESS; | |
667 | disk_max = D_UP_TO_DATE; | |
668 | pdsk_min = D_INCONSISTENT; | |
669 | pdsk_max = D_UNKNOWN; | |
670 | switch ((enum drbd_conns)ns.conn) { | |
671 | case C_WF_BITMAP_T: | |
672 | case C_PAUSED_SYNC_T: | |
673 | case C_STARTING_SYNC_T: | |
674 | case C_WF_SYNC_UUID: | |
675 | case C_BEHIND: | |
676 | disk_min = D_INCONSISTENT; | |
677 | disk_max = D_OUTDATED; | |
678 | pdsk_min = D_UP_TO_DATE; | |
679 | pdsk_max = D_UP_TO_DATE; | |
680 | break; | |
681 | case C_VERIFY_S: | |
682 | case C_VERIFY_T: | |
683 | disk_min = D_UP_TO_DATE; | |
684 | disk_max = D_UP_TO_DATE; | |
685 | pdsk_min = D_UP_TO_DATE; | |
686 | pdsk_max = D_UP_TO_DATE; | |
687 | break; | |
688 | case C_CONNECTED: | |
689 | disk_min = D_DISKLESS; | |
690 | disk_max = D_UP_TO_DATE; | |
691 | pdsk_min = D_DISKLESS; | |
692 | pdsk_max = D_UP_TO_DATE; | |
693 | break; | |
694 | case C_WF_BITMAP_S: | |
695 | case C_PAUSED_SYNC_S: | |
696 | case C_STARTING_SYNC_S: | |
697 | case C_AHEAD: | |
698 | disk_min = D_UP_TO_DATE; | |
699 | disk_max = D_UP_TO_DATE; | |
700 | pdsk_min = D_INCONSISTENT; | |
701 | pdsk_max = D_CONSISTENT; /* D_OUTDATED would be nice. But explicit outdate necessary*/ | |
702 | break; | |
703 | case C_SYNC_TARGET: | |
704 | disk_min = D_INCONSISTENT; | |
705 | disk_max = D_INCONSISTENT; | |
706 | pdsk_min = D_UP_TO_DATE; | |
707 | pdsk_max = D_UP_TO_DATE; | |
708 | break; | |
709 | case C_SYNC_SOURCE: | |
710 | disk_min = D_UP_TO_DATE; | |
711 | disk_max = D_UP_TO_DATE; | |
712 | pdsk_min = D_INCONSISTENT; | |
713 | pdsk_max = D_INCONSISTENT; | |
714 | break; | |
715 | case C_STANDALONE: | |
716 | case C_DISCONNECTING: | |
717 | case C_UNCONNECTED: | |
718 | case C_TIMEOUT: | |
719 | case C_BROKEN_PIPE: | |
720 | case C_NETWORK_FAILURE: | |
721 | case C_PROTOCOL_ERROR: | |
722 | case C_TEAR_DOWN: | |
723 | case C_WF_CONNECTION: | |
724 | case C_WF_REPORT_PARAMS: | |
725 | case C_MASK: | |
726 | break; | |
727 | } | |
728 | if (ns.disk > disk_max) | |
729 | ns.disk = disk_max; | |
730 | ||
731 | if (ns.disk < disk_min) { | |
732 | dev_warn(DEV, "Implicitly set disk from %s to %s\n", | |
733 | drbd_disk_str(ns.disk), drbd_disk_str(disk_min)); | |
734 | ns.disk = disk_min; | |
735 | } | |
736 | if (ns.pdsk > pdsk_max) | |
737 | ns.pdsk = pdsk_max; | |
738 | ||
739 | if (ns.pdsk < pdsk_min) { | |
740 | dev_warn(DEV, "Implicitly set pdsk from %s to %s\n", | |
741 | drbd_disk_str(ns.pdsk), drbd_disk_str(pdsk_min)); | |
742 | ns.pdsk = pdsk_min; | |
743 | } | |
744 | ||
745 | if (fp == FP_STONITH && | |
4308a0a3 | 746 | (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED)) |
b8907339 PR |
747 | ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */ |
748 | ||
f399002e | 749 | if (mdev->tconn->res_opts.on_no_data == OND_SUSPEND_IO && |
4308a0a3 | 750 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) |
b8907339 PR |
751 | ns.susp_nod = 1; /* Suspend IO while no data available (no accessible data available) */ |
752 | ||
753 | if (ns.aftr_isp || ns.peer_isp || ns.user_isp) { | |
754 | if (ns.conn == C_SYNC_SOURCE) | |
755 | ns.conn = C_PAUSED_SYNC_S; | |
756 | if (ns.conn == C_SYNC_TARGET) | |
757 | ns.conn = C_PAUSED_SYNC_T; | |
758 | } else { | |
759 | if (ns.conn == C_PAUSED_SYNC_S) | |
760 | ns.conn = C_SYNC_SOURCE; | |
761 | if (ns.conn == C_PAUSED_SYNC_T) | |
762 | ns.conn = C_SYNC_TARGET; | |
763 | } | |
764 | ||
765 | return ns; | |
766 | } | |
767 | ||
768 | void drbd_resume_al(struct drbd_conf *mdev) | |
769 | { | |
770 | if (test_and_clear_bit(AL_SUSPENDED, &mdev->flags)) | |
771 | dev_info(DEV, "Resumed AL updates\n"); | |
772 | } | |
773 | ||
774 | /* helper for __drbd_set_state */ | |
775 | static void set_ov_position(struct drbd_conf *mdev, enum drbd_conns cs) | |
776 | { | |
777 | if (mdev->tconn->agreed_pro_version < 90) | |
778 | mdev->ov_start_sector = 0; | |
779 | mdev->rs_total = drbd_bm_bits(mdev); | |
780 | mdev->ov_position = 0; | |
781 | if (cs == C_VERIFY_T) { | |
782 | /* starting online verify from an arbitrary position | |
783 | * does not fit well into the existing protocol. | |
784 | * on C_VERIFY_T, we initialize ov_left and friends | |
785 | * implicitly in receive_DataRequest once the | |
786 | * first P_OV_REQUEST is received */ | |
787 | mdev->ov_start_sector = ~(sector_t)0; | |
788 | } else { | |
789 | unsigned long bit = BM_SECT_TO_BIT(mdev->ov_start_sector); | |
790 | if (bit >= mdev->rs_total) { | |
791 | mdev->ov_start_sector = | |
792 | BM_BIT_TO_SECT(mdev->rs_total - 1); | |
793 | mdev->rs_total = 1; | |
794 | } else | |
795 | mdev->rs_total -= bit; | |
796 | mdev->ov_position = mdev->ov_start_sector; | |
797 | } | |
798 | mdev->ov_left = mdev->rs_total; | |
799 | } | |
800 | ||
801 | /** | |
802 | * __drbd_set_state() - Set a new DRBD state | |
803 | * @mdev: DRBD device. | |
804 | * @ns: new state. | |
805 | * @flags: Flags | |
806 | * @done: Optional completion, that will get completed after the after_state_ch() finished | |
807 | * | |
808 | * Caller needs to hold req_lock, and global_state_lock. Do not call directly. | |
809 | */ | |
810 | enum drbd_state_rv | |
811 | __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns, | |
812 | enum chg_state_flags flags, struct completion *done) | |
813 | { | |
814 | union drbd_state os; | |
815 | enum drbd_state_rv rv = SS_SUCCESS; | |
816 | const char *warn_sync_abort = NULL; | |
817 | struct after_state_chg_work *ascw; | |
818 | ||
78bae59b | 819 | os = drbd_read_state(mdev); |
b8907339 | 820 | |
4308a0a3 | 821 | ns = sanitize_state(mdev, ns, &warn_sync_abort); |
b8907339 PR |
822 | if (ns.i == os.i) |
823 | return SS_NOTHING_TO_DO; | |
824 | ||
3509502d PR |
825 | rv = is_valid_transition(os, ns); |
826 | if (rv < SS_SUCCESS) | |
827 | return rv; | |
828 | ||
b8907339 PR |
829 | if (!(flags & CS_HARD)) { |
830 | /* pre-state-change checks ; only look at ns */ | |
831 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
832 | ||
833 | rv = is_valid_state(mdev, ns); | |
834 | if (rv < SS_SUCCESS) { | |
835 | /* If the old state was illegal as well, then let | |
836 | this happen...*/ | |
837 | ||
838 | if (is_valid_state(mdev, os) == rv) | |
a75f34ad | 839 | rv = is_valid_soft_transition(os, ns); |
b8907339 | 840 | } else |
a75f34ad | 841 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
842 | } |
843 | ||
844 | if (rv < SS_SUCCESS) { | |
845 | if (flags & CS_VERBOSE) | |
846 | print_st_err(mdev, os, ns, rv); | |
847 | return rv; | |
848 | } | |
849 | ||
850 | if (warn_sync_abort) | |
851 | dev_warn(DEV, "%s aborted.\n", warn_sync_abort); | |
852 | ||
435693e8 | 853 | drbd_pr_state_change(mdev, os, ns, flags); |
b8907339 | 854 | |
b8907339 PR |
855 | /* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference |
856 | * on the ldev here, to be sure the transition -> D_DISKLESS resp. | |
857 | * drbd_ldev_destroy() won't happen before our corresponding | |
858 | * after_state_ch works run, where we put_ldev again. */ | |
859 | if ((os.disk != D_FAILED && ns.disk == D_FAILED) || | |
860 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS)) | |
861 | atomic_inc(&mdev->local_cnt); | |
862 | ||
da9fbc27 | 863 | mdev->state.i = ns.i; |
8e0af25f PR |
864 | mdev->tconn->susp = ns.susp; |
865 | mdev->tconn->susp_nod = ns.susp_nod; | |
866 | mdev->tconn->susp_fen = ns.susp_fen; | |
b8907339 | 867 | |
0e29d163 PR |
868 | /* solve the race between becoming unconfigured, |
869 | * worker doing the cleanup, and | |
870 | * admin reconfiguring us: | |
871 | * on (re)configure, first set CONFIG_PENDING, | |
872 | * then wait for a potentially exiting worker, | |
873 | * start the worker, and schedule one no_op. | |
874 | * then proceed with configuration. | |
875 | */ | |
876 | if(conn_all_vols_unconf(mdev->tconn) && | |
877 | !test_and_set_bit(CONFIG_PENDING, &mdev->tconn->flags)) | |
878 | set_bit(OBJECT_DYING, &mdev->tconn->flags); | |
879 | ||
b8907339 PR |
880 | if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING) |
881 | drbd_print_uuids(mdev, "attached to UUIDs"); | |
882 | ||
883 | wake_up(&mdev->misc_wait); | |
884 | wake_up(&mdev->state_wait); | |
2a67d8b9 | 885 | wake_up(&mdev->tconn->ping_wait); |
b8907339 PR |
886 | |
887 | /* aborted verify run. log the last position */ | |
888 | if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) && | |
889 | ns.conn < C_CONNECTED) { | |
890 | mdev->ov_start_sector = | |
891 | BM_BIT_TO_SECT(drbd_bm_bits(mdev) - mdev->ov_left); | |
892 | dev_info(DEV, "Online Verify reached sector %llu\n", | |
893 | (unsigned long long)mdev->ov_start_sector); | |
894 | } | |
895 | ||
896 | if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) && | |
897 | (ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)) { | |
898 | dev_info(DEV, "Syncer continues.\n"); | |
899 | mdev->rs_paused += (long)jiffies | |
900 | -(long)mdev->rs_mark_time[mdev->rs_last_mark]; | |
901 | if (ns.conn == C_SYNC_TARGET) | |
902 | mod_timer(&mdev->resync_timer, jiffies); | |
903 | } | |
904 | ||
905 | if ((os.conn == C_SYNC_TARGET || os.conn == C_SYNC_SOURCE) && | |
906 | (ns.conn == C_PAUSED_SYNC_T || ns.conn == C_PAUSED_SYNC_S)) { | |
907 | dev_info(DEV, "Resync suspended\n"); | |
908 | mdev->rs_mark_time[mdev->rs_last_mark] = jiffies; | |
909 | } | |
910 | ||
911 | if (os.conn == C_CONNECTED && | |
912 | (ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T)) { | |
913 | unsigned long now = jiffies; | |
914 | int i; | |
915 | ||
916 | set_ov_position(mdev, ns.conn); | |
917 | mdev->rs_start = now; | |
918 | mdev->rs_last_events = 0; | |
919 | mdev->rs_last_sect_ev = 0; | |
920 | mdev->ov_last_oos_size = 0; | |
921 | mdev->ov_last_oos_start = 0; | |
922 | ||
923 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { | |
924 | mdev->rs_mark_left[i] = mdev->ov_left; | |
925 | mdev->rs_mark_time[i] = now; | |
926 | } | |
927 | ||
928 | drbd_rs_controller_reset(mdev); | |
929 | ||
930 | if (ns.conn == C_VERIFY_S) { | |
931 | dev_info(DEV, "Starting Online Verify from sector %llu\n", | |
932 | (unsigned long long)mdev->ov_position); | |
933 | mod_timer(&mdev->resync_timer, jiffies); | |
934 | } | |
935 | } | |
936 | ||
937 | if (get_ldev(mdev)) { | |
938 | u32 mdf = mdev->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND| | |
939 | MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE| | |
940 | MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY); | |
941 | ||
942 | if (test_bit(CRASHED_PRIMARY, &mdev->flags)) | |
943 | mdf |= MDF_CRASHED_PRIMARY; | |
944 | if (mdev->state.role == R_PRIMARY || | |
945 | (mdev->state.pdsk < D_INCONSISTENT && mdev->state.peer == R_PRIMARY)) | |
946 | mdf |= MDF_PRIMARY_IND; | |
947 | if (mdev->state.conn > C_WF_REPORT_PARAMS) | |
948 | mdf |= MDF_CONNECTED_IND; | |
949 | if (mdev->state.disk > D_INCONSISTENT) | |
950 | mdf |= MDF_CONSISTENT; | |
951 | if (mdev->state.disk > D_OUTDATED) | |
952 | mdf |= MDF_WAS_UP_TO_DATE; | |
953 | if (mdev->state.pdsk <= D_OUTDATED && mdev->state.pdsk >= D_INCONSISTENT) | |
954 | mdf |= MDF_PEER_OUT_DATED; | |
955 | if (mdf != mdev->ldev->md.flags) { | |
956 | mdev->ldev->md.flags = mdf; | |
957 | drbd_md_mark_dirty(mdev); | |
958 | } | |
959 | if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT) | |
960 | drbd_set_ed_uuid(mdev, mdev->ldev->md.uuid[UI_CURRENT]); | |
961 | put_ldev(mdev); | |
962 | } | |
963 | ||
964 | /* Peer was forced D_UP_TO_DATE & R_PRIMARY, consider to resync */ | |
965 | if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT && | |
966 | os.peer == R_SECONDARY && ns.peer == R_PRIMARY) | |
967 | set_bit(CONSIDER_RESYNC, &mdev->flags); | |
968 | ||
969 | /* Receiver should clean up itself */ | |
970 | if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING) | |
971 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
972 | ||
973 | /* Now the receiver finished cleaning up itself, it should die */ | |
974 | if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE) | |
975 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
976 | ||
977 | /* Upon network failure, we need to restart the receiver. */ | |
978 | if (os.conn > C_TEAR_DOWN && | |
979 | ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT) | |
980 | drbd_thread_restart_nowait(&mdev->tconn->receiver); | |
981 | ||
982 | /* Resume AL writing if we get a connection */ | |
983 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
984 | drbd_resume_al(mdev); | |
985 | ||
986 | ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC); | |
987 | if (ascw) { | |
988 | ascw->os = os; | |
989 | ascw->ns = ns; | |
990 | ascw->flags = flags; | |
991 | ascw->w.cb = w_after_state_ch; | |
a21e9298 | 992 | ascw->w.mdev = mdev; |
b8907339 PR |
993 | ascw->done = done; |
994 | drbd_queue_work(&mdev->tconn->data.work, &ascw->w); | |
995 | } else { | |
bbeb641c | 996 | dev_err(DEV, "Could not kmalloc an ascw\n"); |
b8907339 PR |
997 | } |
998 | ||
999 | return rv; | |
1000 | } | |
1001 | ||
99920dc5 | 1002 | static int w_after_state_ch(struct drbd_work *w, int unused) |
b8907339 PR |
1003 | { |
1004 | struct after_state_chg_work *ascw = | |
1005 | container_of(w, struct after_state_chg_work, w); | |
00d56944 | 1006 | struct drbd_conf *mdev = w->mdev; |
b8907339 PR |
1007 | |
1008 | after_state_ch(mdev, ascw->os, ascw->ns, ascw->flags); | |
1009 | if (ascw->flags & CS_WAIT_COMPLETE) { | |
1010 | D_ASSERT(ascw->done != NULL); | |
1011 | complete(ascw->done); | |
1012 | } | |
1013 | kfree(ascw); | |
1014 | ||
99920dc5 | 1015 | return 0; |
b8907339 PR |
1016 | } |
1017 | ||
1018 | static void abw_start_sync(struct drbd_conf *mdev, int rv) | |
1019 | { | |
1020 | if (rv) { | |
1021 | dev_err(DEV, "Writing the bitmap failed not starting resync.\n"); | |
1022 | _drbd_request_state(mdev, NS(conn, C_CONNECTED), CS_VERBOSE); | |
1023 | return; | |
1024 | } | |
1025 | ||
1026 | switch (mdev->state.conn) { | |
1027 | case C_STARTING_SYNC_T: | |
1028 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE); | |
1029 | break; | |
1030 | case C_STARTING_SYNC_S: | |
1031 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | int drbd_bitmap_io_from_worker(struct drbd_conf *mdev, | |
1037 | int (*io_fn)(struct drbd_conf *), | |
1038 | char *why, enum bm_flag flags) | |
1039 | { | |
1040 | int rv; | |
1041 | ||
1042 | D_ASSERT(current == mdev->tconn->worker.task); | |
1043 | ||
1044 | /* open coded non-blocking drbd_suspend_io(mdev); */ | |
1045 | set_bit(SUSPEND_IO, &mdev->flags); | |
1046 | ||
1047 | drbd_bm_lock(mdev, why, flags); | |
1048 | rv = io_fn(mdev); | |
1049 | drbd_bm_unlock(mdev); | |
1050 | ||
1051 | drbd_resume_io(mdev); | |
1052 | ||
1053 | return rv; | |
1054 | } | |
1055 | ||
1056 | /** | |
1057 | * after_state_ch() - Perform after state change actions that may sleep | |
1058 | * @mdev: DRBD device. | |
1059 | * @os: old state. | |
1060 | * @ns: new state. | |
1061 | * @flags: Flags | |
1062 | */ | |
1063 | static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, | |
1064 | union drbd_state ns, enum chg_state_flags flags) | |
1065 | { | |
1066 | enum drbd_fencing_p fp; | |
1067 | enum drbd_req_event what = NOTHING; | |
69f5ec72 | 1068 | union drbd_state nsm; |
3b98c0c2 LE |
1069 | struct sib_info sib; |
1070 | ||
1071 | sib.sib_reason = SIB_STATE_CHANGE; | |
1072 | sib.os = os; | |
1073 | sib.ns = ns; | |
b8907339 PR |
1074 | |
1075 | if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) { | |
1076 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1077 | if (mdev->p_uuid) | |
1078 | mdev->p_uuid[UI_FLAGS] &= ~((u64)2); | |
1079 | } | |
1080 | ||
1081 | fp = FP_DONT_CARE; | |
1082 | if (get_ldev(mdev)) { | |
1083 | fp = mdev->ldev->dc.fencing; | |
1084 | put_ldev(mdev); | |
1085 | } | |
1086 | ||
1087 | /* Inform userspace about the change... */ | |
3b98c0c2 | 1088 | drbd_bcast_event(mdev, &sib); |
b8907339 PR |
1089 | |
1090 | if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) && | |
1091 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) | |
1092 | drbd_khelper(mdev, "pri-on-incon-degr"); | |
1093 | ||
1094 | /* Here we have the actions that are performed after a | |
1095 | state change. This function might sleep */ | |
1096 | ||
1097 | nsm.i = -1; | |
1098 | if (ns.susp_nod) { | |
1099 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
1100 | what = RESEND; | |
1101 | ||
1102 | if (os.disk == D_ATTACHING && ns.disk > D_ATTACHING) | |
1103 | what = RESTART_FROZEN_DISK_IO; | |
1104 | ||
1105 | if (what != NOTHING) | |
1106 | nsm.susp_nod = 0; | |
1107 | } | |
1108 | ||
1109 | if (ns.susp_fen) { | |
1110 | /* case1: The outdate peer handler is successful: */ | |
1111 | if (os.pdsk > D_OUTDATED && ns.pdsk <= D_OUTDATED) { | |
2f5cdd0b | 1112 | tl_clear(mdev->tconn); |
b8907339 PR |
1113 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
1114 | drbd_uuid_new_current(mdev); | |
1115 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1116 | } | |
1117 | spin_lock_irq(&mdev->tconn->req_lock); | |
1118 | _drbd_set_state(_NS(mdev, susp_fen, 0), CS_VERBOSE, NULL); | |
1119 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1120 | } | |
1121 | /* case2: The connection was established again: */ | |
1122 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { | |
1123 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1124 | what = RESEND; | |
1125 | nsm.susp_fen = 0; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | if (what != NOTHING) { | |
1130 | spin_lock_irq(&mdev->tconn->req_lock); | |
2f5cdd0b | 1131 | _tl_restart(mdev->tconn, what); |
b8907339 PR |
1132 | nsm.i &= mdev->state.i; |
1133 | _drbd_set_state(mdev, nsm, CS_VERBOSE, NULL); | |
1134 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1135 | } | |
1136 | ||
1137 | /* Became sync source. With protocol >= 96, we still need to send out | |
1138 | * the sync uuid now. Need to do that before any drbd_send_state, or | |
1139 | * the other side may go "paused sync" before receiving the sync uuids, | |
1140 | * which is unexpected. */ | |
1141 | if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) && | |
1142 | (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) && | |
1143 | mdev->tconn->agreed_pro_version >= 96 && get_ldev(mdev)) { | |
1144 | drbd_gen_and_send_sync_uuid(mdev); | |
1145 | put_ldev(mdev); | |
1146 | } | |
1147 | ||
1148 | /* Do not change the order of the if above and the two below... */ | |
1149 | if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */ | |
1150 | drbd_send_uuids(mdev); | |
1151 | drbd_send_state(mdev); | |
1152 | } | |
1153 | /* No point in queuing send_bitmap if we don't have a connection | |
1154 | * anymore, so check also the _current_ state, not only the new state | |
1155 | * at the time this work was queued. */ | |
1156 | if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S && | |
1157 | mdev->state.conn == C_WF_BITMAP_S) | |
1158 | drbd_queue_bitmap_io(mdev, &drbd_send_bitmap, NULL, | |
1159 | "send_bitmap (WFBitMapS)", | |
1160 | BM_LOCKED_TEST_ALLOWED); | |
1161 | ||
1162 | /* Lost contact to peer's copy of the data */ | |
1163 | if ((os.pdsk >= D_INCONSISTENT && | |
1164 | os.pdsk != D_UNKNOWN && | |
1165 | os.pdsk != D_OUTDATED) | |
1166 | && (ns.pdsk < D_INCONSISTENT || | |
1167 | ns.pdsk == D_UNKNOWN || | |
1168 | ns.pdsk == D_OUTDATED)) { | |
1169 | if (get_ldev(mdev)) { | |
1170 | if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) && | |
1171 | mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { | |
2aebfabb | 1172 | if (drbd_suspended(mdev)) { |
b8907339 PR |
1173 | set_bit(NEW_CUR_UUID, &mdev->flags); |
1174 | } else { | |
1175 | drbd_uuid_new_current(mdev); | |
1176 | drbd_send_uuids(mdev); | |
1177 | } | |
1178 | } | |
1179 | put_ldev(mdev); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) { | |
1184 | if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) { | |
1185 | drbd_uuid_new_current(mdev); | |
1186 | drbd_send_uuids(mdev); | |
1187 | } | |
1188 | ||
1189 | /* D_DISKLESS Peer becomes secondary */ | |
1190 | if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY) | |
1191 | /* We may still be Primary ourselves. | |
1192 | * No harm done if the bitmap still changes, | |
1193 | * redirtied pages will follow later. */ | |
1194 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1195 | "demote diskless peer", BM_LOCKED_SET_ALLOWED); | |
1196 | put_ldev(mdev); | |
1197 | } | |
1198 | ||
1199 | /* Write out all changed bits on demote. | |
1200 | * Though, no need to da that just yet | |
1201 | * if there is a resync going on still */ | |
1202 | if (os.role == R_PRIMARY && ns.role == R_SECONDARY && | |
1203 | mdev->state.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1204 | /* No changes to the bitmap expected this time, so assert that, | |
1205 | * even though no harm was done if it did change. */ | |
1206 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1207 | "demote", BM_LOCKED_TEST_ALLOWED); | |
1208 | put_ldev(mdev); | |
1209 | } | |
1210 | ||
1211 | /* Last part of the attaching process ... */ | |
1212 | if (ns.conn >= C_CONNECTED && | |
1213 | os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) { | |
1214 | drbd_send_sizes(mdev, 0, 0); /* to start sync... */ | |
1215 | drbd_send_uuids(mdev); | |
1216 | drbd_send_state(mdev); | |
1217 | } | |
1218 | ||
1219 | /* We want to pause/continue resync, tell peer. */ | |
1220 | if (ns.conn >= C_CONNECTED && | |
1221 | ((os.aftr_isp != ns.aftr_isp) || | |
1222 | (os.user_isp != ns.user_isp))) | |
1223 | drbd_send_state(mdev); | |
1224 | ||
1225 | /* In case one of the isp bits got set, suspend other devices. */ | |
1226 | if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) && | |
1227 | (ns.aftr_isp || ns.peer_isp || ns.user_isp)) | |
1228 | suspend_other_sg(mdev); | |
1229 | ||
1230 | /* Make sure the peer gets informed about eventual state | |
1231 | changes (ISP bits) while we were in WFReportParams. */ | |
1232 | if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED) | |
1233 | drbd_send_state(mdev); | |
1234 | ||
1235 | if (os.conn != C_AHEAD && ns.conn == C_AHEAD) | |
1236 | drbd_send_state(mdev); | |
1237 | ||
1238 | /* We are in the progress to start a full sync... */ | |
1239 | if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
1240 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S)) | |
1241 | /* no other bitmap changes expected during this phase */ | |
1242 | drbd_queue_bitmap_io(mdev, | |
1243 | &drbd_bmio_set_n_write, &abw_start_sync, | |
1244 | "set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED); | |
1245 | ||
1246 | /* We are invalidating our self... */ | |
1247 | if (os.conn < C_CONNECTED && ns.conn < C_CONNECTED && | |
1248 | os.disk > D_INCONSISTENT && ns.disk == D_INCONSISTENT) | |
1249 | /* other bitmap operation expected during this phase */ | |
1250 | drbd_queue_bitmap_io(mdev, &drbd_bmio_set_n_write, NULL, | |
1251 | "set_n_write from invalidate", BM_LOCKED_MASK); | |
1252 | ||
1253 | /* first half of local IO error, failure to attach, | |
1254 | * or administrative detach */ | |
1255 | if (os.disk != D_FAILED && ns.disk == D_FAILED) { | |
1256 | enum drbd_io_error_p eh; | |
1257 | int was_io_error; | |
1258 | /* corresponding get_ldev was in __drbd_set_state, to serialize | |
1259 | * our cleanup here with the transition to D_DISKLESS, | |
1260 | * so it is safe to dreference ldev here. */ | |
1261 | eh = mdev->ldev->dc.on_io_error; | |
1262 | was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags); | |
1263 | ||
1264 | /* current state still has to be D_FAILED, | |
1265 | * there is only one way out: to D_DISKLESS, | |
1266 | * and that may only happen after our put_ldev below. */ | |
1267 | if (mdev->state.disk != D_FAILED) | |
1268 | dev_err(DEV, | |
1269 | "ASSERT FAILED: disk is %s during detach\n", | |
1270 | drbd_disk_str(mdev->state.disk)); | |
1271 | ||
927036f9 | 1272 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1273 | dev_warn(DEV, "Notified peer that I am detaching my disk\n"); |
1274 | else | |
1275 | dev_err(DEV, "Sending state for detaching disk failed\n"); | |
1276 | ||
1277 | drbd_rs_cancel_all(mdev); | |
1278 | ||
1279 | /* In case we want to get something to stable storage still, | |
1280 | * this may be the last chance. | |
1281 | * Following put_ldev may transition to D_DISKLESS. */ | |
1282 | drbd_md_sync(mdev); | |
1283 | put_ldev(mdev); | |
1284 | ||
1285 | if (was_io_error && eh == EP_CALL_HELPER) | |
1286 | drbd_khelper(mdev, "local-io-error"); | |
1287 | } | |
1288 | ||
1289 | /* second half of local IO error, failure to attach, | |
1290 | * or administrative detach, | |
1291 | * after local_cnt references have reached zero again */ | |
1292 | if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) { | |
1293 | /* We must still be diskless, | |
1294 | * re-attach has to be serialized with this! */ | |
1295 | if (mdev->state.disk != D_DISKLESS) | |
1296 | dev_err(DEV, | |
1297 | "ASSERT FAILED: disk is %s while going diskless\n", | |
1298 | drbd_disk_str(mdev->state.disk)); | |
1299 | ||
1300 | mdev->rs_total = 0; | |
1301 | mdev->rs_failed = 0; | |
1302 | atomic_set(&mdev->rs_pending_cnt, 0); | |
1303 | ||
927036f9 | 1304 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1305 | dev_warn(DEV, "Notified peer that I'm now diskless.\n"); |
1306 | /* corresponding get_ldev in __drbd_set_state | |
1307 | * this may finally trigger drbd_ldev_destroy. */ | |
1308 | put_ldev(mdev); | |
1309 | } | |
1310 | ||
1311 | /* Notify peer that I had a local IO error, and did not detached.. */ | |
1312 | if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT) | |
1313 | drbd_send_state(mdev); | |
1314 | ||
1315 | /* Disks got bigger while they were detached */ | |
1316 | if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING && | |
1317 | test_and_clear_bit(RESYNC_AFTER_NEG, &mdev->flags)) { | |
1318 | if (ns.conn == C_CONNECTED) | |
1319 | resync_after_online_grow(mdev); | |
1320 | } | |
1321 | ||
1322 | /* A resync finished or aborted, wake paused devices... */ | |
1323 | if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) || | |
1324 | (os.peer_isp && !ns.peer_isp) || | |
1325 | (os.user_isp && !ns.user_isp)) | |
1326 | resume_next_sg(mdev); | |
1327 | ||
1328 | /* sync target done with resync. Explicitly notify peer, even though | |
1329 | * it should (at least for non-empty resyncs) already know itself. */ | |
1330 | if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED) | |
1331 | drbd_send_state(mdev); | |
1332 | ||
1333 | /* This triggers bitmap writeout of potentially still unwritten pages | |
1334 | * if the resync finished cleanly, or aborted because of peer disk | |
1335 | * failure, or because of connection loss. | |
1336 | * For resync aborted because of local disk failure, we cannot do | |
1337 | * any bitmap writeout anymore. | |
1338 | * No harm done if some bits change during this phase. | |
1339 | */ | |
1340 | if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1341 | drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL, | |
1342 | "write from resync_finished", BM_LOCKED_SET_ALLOWED); | |
1343 | put_ldev(mdev); | |
1344 | } | |
1345 | ||
1346 | if (ns.disk == D_DISKLESS && | |
1347 | ns.conn == C_STANDALONE && | |
1348 | ns.role == R_SECONDARY) { | |
1349 | if (os.aftr_isp != ns.aftr_isp) | |
1350 | resume_next_sg(mdev); | |
1351 | } | |
1352 | ||
0e29d163 | 1353 | after_all_state_ch(mdev->tconn); |
bbeb641c | 1354 | |
b8907339 PR |
1355 | drbd_md_sync(mdev); |
1356 | } | |
1357 | ||
bbeb641c PR |
1358 | struct after_conn_state_chg_work { |
1359 | struct drbd_work w; | |
1360 | enum drbd_conns oc; | |
5f082f98 | 1361 | union drbd_state ns_max; /* new, max state, over all mdevs */ |
bbeb641c PR |
1362 | enum chg_state_flags flags; |
1363 | }; | |
1364 | ||
0e29d163 | 1365 | static void after_all_state_ch(struct drbd_tconn *tconn) |
b8907339 | 1366 | { |
0e29d163 PR |
1367 | if (conn_all_vols_unconf(tconn) && |
1368 | test_bit(OBJECT_DYING, &tconn->flags)) { | |
bbeb641c PR |
1369 | drbd_thread_stop_nowait(&tconn->worker); |
1370 | } | |
1371 | } | |
1372 | ||
99920dc5 | 1373 | static int w_after_conn_state_ch(struct drbd_work *w, int unused) |
bbeb641c PR |
1374 | { |
1375 | struct after_conn_state_chg_work *acscw = | |
1376 | container_of(w, struct after_conn_state_chg_work, w); | |
1377 | struct drbd_tconn *tconn = w->tconn; | |
1378 | enum drbd_conns oc = acscw->oc; | |
5f082f98 | 1379 | union drbd_state ns_max = acscw->ns_max; |
bbeb641c PR |
1380 | |
1381 | kfree(acscw); | |
1382 | ||
b8907339 | 1383 | /* Upon network configuration, we need to start the receiver */ |
5f082f98 | 1384 | if (oc == C_STANDALONE && ns_max.conn == C_UNCONNECTED) |
b8907339 PR |
1385 | drbd_thread_start(&tconn->receiver); |
1386 | ||
bbeb641c | 1387 | //conn_err(tconn, STATE_FMT, STATE_ARGS("nms", nms)); |
0e29d163 | 1388 | after_all_state_ch(tconn); |
bbeb641c | 1389 | |
99920dc5 | 1390 | return 0; |
bbeb641c PR |
1391 | } |
1392 | ||
435693e8 | 1393 | void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum chg_state_flags *pf) |
88ef594e | 1394 | { |
435693e8 | 1395 | enum chg_state_flags flags = ~0; |
da9fbc27 | 1396 | union drbd_dev_state os, cs = {}; /* old_state, common_state */ |
88ef594e | 1397 | struct drbd_conf *mdev; |
435693e8 | 1398 | int vnr, first_vol = 1; |
88ef594e PR |
1399 | |
1400 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
1401 | os = mdev->state; | |
1402 | ||
435693e8 PR |
1403 | if (first_vol) { |
1404 | cs = os; | |
1405 | first_vol = 0; | |
1406 | continue; | |
1407 | } | |
1408 | ||
1409 | if (cs.role != os.role) | |
1410 | flags &= ~CS_DC_ROLE; | |
1411 | ||
1412 | if (cs.peer != os.peer) | |
1413 | flags &= ~CS_DC_PEER; | |
1414 | ||
1415 | if (cs.conn != os.conn) | |
1416 | flags &= ~CS_DC_CONN; | |
88ef594e | 1417 | |
435693e8 PR |
1418 | if (cs.disk != os.disk) |
1419 | flags &= ~CS_DC_DISK; | |
88ef594e | 1420 | |
435693e8 PR |
1421 | if (cs.pdsk != os.pdsk) |
1422 | flags &= ~CS_DC_PDSK; | |
1423 | } | |
1424 | ||
1425 | *pf |= CS_DC_MASK; | |
1426 | *pf &= flags; | |
da9fbc27 | 1427 | (*pcs).i = cs.i; |
88ef594e | 1428 | } |
bbeb641c | 1429 | |
bd0c824a PR |
1430 | static enum drbd_state_rv |
1431 | conn_is_valid_transition(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
88ef594e | 1432 | enum chg_state_flags flags) |
bbeb641c | 1433 | { |
bd0c824a | 1434 | enum drbd_state_rv rv = SS_SUCCESS; |
bbeb641c | 1435 | union drbd_state ns, os; |
bd0c824a PR |
1436 | struct drbd_conf *mdev; |
1437 | int vnr; | |
bbeb641c | 1438 | |
bd0c824a | 1439 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
78bae59b | 1440 | os = drbd_read_state(mdev); |
bd0c824a PR |
1441 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
1442 | ||
778bcf2e PR |
1443 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
1444 | ns.disk = os.disk; | |
1445 | ||
bd0c824a PR |
1446 | if (ns.i == os.i) |
1447 | continue; | |
bbeb641c | 1448 | |
bd0c824a PR |
1449 | rv = is_valid_transition(os, ns); |
1450 | if (rv < SS_SUCCESS) | |
1451 | break; | |
1452 | ||
1453 | if (!(flags & CS_HARD)) { | |
1454 | rv = is_valid_state(mdev, ns); | |
1455 | if (rv < SS_SUCCESS) { | |
1456 | if (is_valid_state(mdev, os) == rv) | |
1457 | rv = is_valid_soft_transition(os, ns); | |
1458 | } else | |
1459 | rv = is_valid_soft_transition(os, ns); | |
1460 | } | |
1461 | if (rv < SS_SUCCESS) | |
1462 | break; | |
bbeb641c PR |
1463 | } |
1464 | ||
bd0c824a PR |
1465 | if (rv < SS_SUCCESS && flags & CS_VERBOSE) |
1466 | print_st_err(mdev, os, ns, rv); | |
1467 | ||
1468 | return rv; | |
bbeb641c PR |
1469 | } |
1470 | ||
bd0c824a PR |
1471 | static union drbd_state |
1472 | conn_set_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1473 | enum chg_state_flags flags) | |
bbeb641c | 1474 | { |
bd0c824a PR |
1475 | union drbd_state ns, os, ms = { }; |
1476 | struct drbd_conf *mdev; | |
bbeb641c | 1477 | enum drbd_state_rv rv; |
bd0c824a | 1478 | int vnr; |
bbeb641c | 1479 | |
bd0c824a PR |
1480 | if (mask.conn == C_MASK) |
1481 | tconn->cstate = val.conn; | |
1482 | ||
1483 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
78bae59b | 1484 | os = drbd_read_state(mdev); |
bd0c824a PR |
1485 | ns = apply_mask_val(os, mask, val); |
1486 | ns = sanitize_state(mdev, ns, NULL); | |
bbeb641c | 1487 | |
778bcf2e PR |
1488 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
1489 | ns.disk = os.disk; | |
1490 | ||
bd0c824a PR |
1491 | rv = __drbd_set_state(mdev, ns, flags, NULL); |
1492 | if (rv < SS_SUCCESS) | |
1493 | BUG(); | |
bbeb641c | 1494 | |
bd0c824a PR |
1495 | ms.role = max_role(mdev->state.role, ms.role); |
1496 | ms.peer = max_role(mdev->state.peer, ms.peer); | |
1497 | ms.disk = max_t(enum drbd_disk_state, mdev->state.disk, ms.disk); | |
1498 | ms.pdsk = max_t(enum drbd_disk_state, mdev->state.pdsk, ms.pdsk); | |
1499 | } | |
bbeb641c | 1500 | |
bd0c824a | 1501 | return ms; |
bbeb641c PR |
1502 | } |
1503 | ||
df24aa45 PR |
1504 | static enum drbd_state_rv |
1505 | _conn_rq_cond(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val) | |
1506 | { | |
df24aa45 PR |
1507 | enum drbd_state_rv rv; |
1508 | ||
1509 | if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &tconn->flags)) | |
1510 | return SS_CW_SUCCESS; | |
1511 | ||
1512 | if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &tconn->flags)) | |
1513 | return SS_CW_FAILED_BY_PEER; | |
1514 | ||
df24aa45 PR |
1515 | spin_lock_irq(&tconn->req_lock); |
1516 | rv = tconn->cstate != C_WF_REPORT_PARAMS ? SS_CW_NO_NEED : SS_UNKNOWN_ERROR; | |
1517 | ||
1518 | if (rv == SS_UNKNOWN_ERROR) | |
435693e8 | 1519 | rv = conn_is_valid_transition(tconn, mask, val, 0); |
df24aa45 | 1520 | |
bd0c824a PR |
1521 | if (rv == SS_SUCCESS) |
1522 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
df24aa45 PR |
1523 | |
1524 | spin_unlock_irq(&tconn->req_lock); | |
1525 | ||
1526 | return rv; | |
1527 | } | |
1528 | ||
1529 | static enum drbd_state_rv | |
1530 | conn_cl_wide(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1531 | enum chg_state_flags f) | |
1532 | { | |
1533 | enum drbd_state_rv rv; | |
1534 | ||
1535 | spin_unlock_irq(&tconn->req_lock); | |
1536 | mutex_lock(&tconn->cstate_mutex); | |
1537 | ||
caee1c3a | 1538 | if (conn_send_state_req(tconn, mask, val)) { |
df24aa45 PR |
1539 | rv = SS_CW_FAILED_BY_PEER; |
1540 | /* if (f & CS_VERBOSE) | |
1541 | print_st_err(mdev, os, ns, rv); */ | |
1542 | goto abort; | |
1543 | } | |
1544 | ||
1545 | wait_event(tconn->ping_wait, (rv = _conn_rq_cond(tconn, mask, val))); | |
1546 | ||
1547 | abort: | |
1548 | mutex_unlock(&tconn->cstate_mutex); | |
1549 | spin_lock_irq(&tconn->req_lock); | |
1550 | ||
1551 | return rv; | |
1552 | } | |
1553 | ||
bbeb641c PR |
1554 | enum drbd_state_rv |
1555 | _conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1556 | enum chg_state_flags flags) | |
1557 | { | |
1558 | enum drbd_state_rv rv = SS_SUCCESS; | |
bbeb641c PR |
1559 | struct after_conn_state_chg_work *acscw; |
1560 | enum drbd_conns oc = tconn->cstate; | |
5f082f98 | 1561 | union drbd_state ns_max, os; |
bbeb641c | 1562 | |
bbeb641c PR |
1563 | rv = is_valid_conn_transition(oc, val.conn); |
1564 | if (rv < SS_SUCCESS) | |
1565 | goto abort; | |
1566 | ||
88ef594e | 1567 | rv = conn_is_valid_transition(tconn, mask, val, flags); |
bbeb641c PR |
1568 | if (rv < SS_SUCCESS) |
1569 | goto abort; | |
1570 | ||
df24aa45 PR |
1571 | if (oc == C_WF_REPORT_PARAMS && val.conn == C_DISCONNECTING && |
1572 | !(flags & (CS_LOCAL_ONLY | CS_HARD))) { | |
1573 | rv = conn_cl_wide(tconn, mask, val, flags); | |
1574 | if (rv < SS_SUCCESS) | |
1575 | goto abort; | |
1576 | } | |
1577 | ||
435693e8 | 1578 | conn_old_common_state(tconn, &os, &flags); |
5f082f98 PR |
1579 | ns_max = conn_set_state(tconn, mask, val, flags); |
1580 | ns_max.conn = val.conn; | |
1581 | conn_pr_state_change(tconn, os, ns_max, flags); | |
bbeb641c PR |
1582 | |
1583 | acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC); | |
1584 | if (acscw) { | |
435693e8 | 1585 | acscw->oc = os.conn; |
5f082f98 | 1586 | acscw->ns_max = ns_max; |
bbeb641c PR |
1587 | acscw->flags = flags; |
1588 | acscw->w.cb = w_after_conn_state_ch; | |
1589 | acscw->w.tconn = tconn; | |
1590 | drbd_queue_work(&tconn->data.work, &acscw->w); | |
1591 | } else { | |
1592 | conn_err(tconn, "Could not kmalloc an acscw\n"); | |
b8907339 | 1593 | } |
bbeb641c PR |
1594 | |
1595 | abort: | |
bbeb641c PR |
1596 | return rv; |
1597 | } | |
1598 | ||
1599 | enum drbd_state_rv | |
1600 | conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1601 | enum chg_state_flags flags) | |
1602 | { | |
1603 | enum drbd_state_rv rv; | |
1604 | ||
1605 | spin_lock_irq(&tconn->req_lock); | |
1606 | rv = _conn_request_state(tconn, mask, val, flags); | |
1607 | spin_unlock_irq(&tconn->req_lock); | |
1608 | ||
1609 | return rv; | |
b8907339 | 1610 | } |