]>
Commit | Line | Data |
---|---|---|
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 | ||
4669265a PR |
124 | enum drbd_disk_state conn_lowest_disk(struct drbd_tconn *tconn) |
125 | { | |
126 | enum drbd_disk_state ds = D_MASK; | |
127 | struct drbd_conf *mdev; | |
128 | int vnr; | |
129 | ||
130 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
131 | ds = min_t(enum drbd_disk_state, ds, mdev->state.disk); | |
132 | ||
133 | return ds; | |
134 | } | |
135 | ||
cb703454 PR |
136 | enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn) |
137 | { | |
138 | enum drbd_disk_state ds = D_DISKLESS; | |
139 | struct drbd_conf *mdev; | |
140 | int vnr; | |
141 | ||
142 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
143 | ds = max_t(enum drbd_disk_state, ds, mdev->state.pdsk); | |
144 | ||
145 | return ds; | |
146 | } | |
147 | ||
19f83c76 PR |
148 | enum drbd_conns conn_lowest_conn(struct drbd_tconn *tconn) |
149 | { | |
150 | enum drbd_conns conn = C_MASK; | |
151 | struct drbd_conf *mdev; | |
152 | int vnr; | |
153 | ||
154 | idr_for_each_entry(&tconn->volumes, mdev, vnr) | |
155 | conn = min_t(enum drbd_conns, conn, mdev->state.conn); | |
156 | ||
157 | return conn; | |
158 | } | |
159 | ||
b8907339 PR |
160 | /** |
161 | * cl_wide_st_chg() - true if the state change is a cluster wide one | |
162 | * @mdev: DRBD device. | |
163 | * @os: old (current) state. | |
164 | * @ns: new (wanted) state. | |
165 | */ | |
166 | static int cl_wide_st_chg(struct drbd_conf *mdev, | |
167 | union drbd_state os, union drbd_state ns) | |
168 | { | |
169 | return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED && | |
170 | ((os.role != R_PRIMARY && ns.role == R_PRIMARY) || | |
171 | (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
172 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) || | |
173 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))) || | |
174 | (os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) || | |
175 | (os.conn == C_CONNECTED && ns.conn == C_VERIFY_S); | |
176 | } | |
177 | ||
56707f9e PR |
178 | static union drbd_state |
179 | apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val) | |
180 | { | |
181 | union drbd_state ns; | |
182 | ns.i = (os.i & ~mask.i) | val.i; | |
183 | return ns; | |
184 | } | |
185 | ||
b8907339 PR |
186 | enum drbd_state_rv |
187 | drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f, | |
188 | union drbd_state mask, union drbd_state val) | |
189 | { | |
190 | unsigned long flags; | |
56707f9e | 191 | union drbd_state ns; |
b8907339 PR |
192 | enum drbd_state_rv rv; |
193 | ||
194 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 195 | ns = apply_mask_val(drbd_read_state(mdev), mask, val); |
b8907339 | 196 | rv = _drbd_set_state(mdev, ns, f, NULL); |
b8907339 PR |
197 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); |
198 | ||
199 | return rv; | |
200 | } | |
201 | ||
202 | /** | |
203 | * drbd_force_state() - Impose a change which happens outside our control on our state | |
204 | * @mdev: DRBD device. | |
205 | * @mask: mask of state bits to change. | |
206 | * @val: value of new state bits. | |
207 | */ | |
208 | void drbd_force_state(struct drbd_conf *mdev, | |
209 | union drbd_state mask, union drbd_state val) | |
210 | { | |
211 | drbd_change_state(mdev, CS_HARD, mask, val); | |
212 | } | |
213 | ||
214 | static enum drbd_state_rv | |
215 | _req_st_cond(struct drbd_conf *mdev, union drbd_state mask, | |
216 | union drbd_state val) | |
217 | { | |
218 | union drbd_state os, ns; | |
219 | unsigned long flags; | |
220 | enum drbd_state_rv rv; | |
221 | ||
222 | if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &mdev->flags)) | |
223 | return SS_CW_SUCCESS; | |
224 | ||
225 | if (test_and_clear_bit(CL_ST_CHG_FAIL, &mdev->flags)) | |
226 | return SS_CW_FAILED_BY_PEER; | |
227 | ||
b8907339 | 228 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); |
78bae59b | 229 | os = drbd_read_state(mdev); |
56707f9e | 230 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d PR |
231 | rv = is_valid_transition(os, ns); |
232 | if (rv == SS_SUCCESS) | |
233 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
b8907339 PR |
234 | |
235 | if (!cl_wide_st_chg(mdev, os, ns)) | |
236 | rv = SS_CW_NO_NEED; | |
3509502d | 237 | if (rv == SS_UNKNOWN_ERROR) { |
b8907339 PR |
238 | rv = is_valid_state(mdev, ns); |
239 | if (rv == SS_SUCCESS) { | |
a75f34ad | 240 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
241 | if (rv == SS_SUCCESS) |
242 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
243 | } | |
244 | } | |
245 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
246 | ||
247 | return rv; | |
248 | } | |
249 | ||
250 | /** | |
251 | * drbd_req_state() - Perform an eventually cluster wide state change | |
252 | * @mdev: DRBD device. | |
253 | * @mask: mask of state bits to change. | |
254 | * @val: value of new state bits. | |
255 | * @f: flags | |
256 | * | |
257 | * Should not be called directly, use drbd_request_state() or | |
258 | * _drbd_request_state(). | |
259 | */ | |
260 | static enum drbd_state_rv | |
261 | drbd_req_state(struct drbd_conf *mdev, union drbd_state mask, | |
262 | union drbd_state val, enum chg_state_flags f) | |
263 | { | |
264 | struct completion done; | |
265 | unsigned long flags; | |
266 | union drbd_state os, ns; | |
267 | enum drbd_state_rv rv; | |
268 | ||
269 | init_completion(&done); | |
270 | ||
271 | if (f & CS_SERIALIZE) | |
8410da8f | 272 | mutex_lock(mdev->state_mutex); |
b8907339 PR |
273 | |
274 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 275 | os = drbd_read_state(mdev); |
56707f9e | 276 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
3509502d | 277 | rv = is_valid_transition(os, ns); |
3c5e5f6a LE |
278 | if (rv < SS_SUCCESS) { |
279 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
3509502d | 280 | goto abort; |
3c5e5f6a | 281 | } |
b8907339 PR |
282 | |
283 | if (cl_wide_st_chg(mdev, os, ns)) { | |
284 | rv = is_valid_state(mdev, ns); | |
285 | if (rv == SS_SUCCESS) | |
a75f34ad | 286 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
287 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); |
288 | ||
289 | if (rv < SS_SUCCESS) { | |
290 | if (f & CS_VERBOSE) | |
291 | print_st_err(mdev, os, ns, rv); | |
292 | goto abort; | |
293 | } | |
294 | ||
d24ae219 | 295 | if (drbd_send_state_req(mdev, mask, val)) { |
b8907339 PR |
296 | rv = SS_CW_FAILED_BY_PEER; |
297 | if (f & CS_VERBOSE) | |
298 | print_st_err(mdev, os, ns, rv); | |
299 | goto abort; | |
300 | } | |
301 | ||
302 | wait_event(mdev->state_wait, | |
303 | (rv = _req_st_cond(mdev, mask, val))); | |
304 | ||
305 | if (rv < SS_SUCCESS) { | |
b8907339 PR |
306 | if (f & CS_VERBOSE) |
307 | print_st_err(mdev, os, ns, rv); | |
308 | goto abort; | |
309 | } | |
310 | spin_lock_irqsave(&mdev->tconn->req_lock, flags); | |
78bae59b | 311 | ns = apply_mask_val(drbd_read_state(mdev), mask, val); |
b8907339 | 312 | rv = _drbd_set_state(mdev, ns, f, &done); |
b8907339 PR |
313 | } else { |
314 | rv = _drbd_set_state(mdev, ns, f, &done); | |
315 | } | |
316 | ||
317 | spin_unlock_irqrestore(&mdev->tconn->req_lock, flags); | |
318 | ||
319 | if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) { | |
320 | D_ASSERT(current != mdev->tconn->worker.task); | |
321 | wait_for_completion(&done); | |
322 | } | |
323 | ||
324 | abort: | |
325 | if (f & CS_SERIALIZE) | |
8410da8f | 326 | mutex_unlock(mdev->state_mutex); |
b8907339 PR |
327 | |
328 | return rv; | |
329 | } | |
330 | ||
331 | /** | |
332 | * _drbd_request_state() - Request a state change (with flags) | |
333 | * @mdev: DRBD device. | |
334 | * @mask: mask of state bits to change. | |
335 | * @val: value of new state bits. | |
336 | * @f: flags | |
337 | * | |
338 | * Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE | |
339 | * flag, or when logging of failed state change requests is not desired. | |
340 | */ | |
341 | enum drbd_state_rv | |
342 | _drbd_request_state(struct drbd_conf *mdev, union drbd_state mask, | |
343 | union drbd_state val, enum chg_state_flags f) | |
344 | { | |
345 | enum drbd_state_rv rv; | |
346 | ||
347 | wait_event(mdev->state_wait, | |
348 | (rv = drbd_req_state(mdev, mask, val, f)) != SS_IN_TRANSIENT_STATE); | |
349 | ||
350 | return rv; | |
351 | } | |
352 | ||
353 | static void print_st(struct drbd_conf *mdev, char *name, union drbd_state ns) | |
354 | { | |
355 | dev_err(DEV, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n", | |
356 | name, | |
357 | drbd_conn_str(ns.conn), | |
358 | drbd_role_str(ns.role), | |
359 | drbd_role_str(ns.peer), | |
360 | drbd_disk_str(ns.disk), | |
361 | drbd_disk_str(ns.pdsk), | |
362 | is_susp(ns) ? 's' : 'r', | |
363 | ns.aftr_isp ? 'a' : '-', | |
364 | ns.peer_isp ? 'p' : '-', | |
365 | ns.user_isp ? 'u' : '-', | |
366 | ns.susp_fen ? 'F' : '-', | |
367 | ns.susp_nod ? 'N' : '-' | |
368 | ); | |
369 | } | |
370 | ||
371 | void print_st_err(struct drbd_conf *mdev, union drbd_state os, | |
372 | union drbd_state ns, enum drbd_state_rv err) | |
373 | { | |
374 | if (err == SS_IN_TRANSIENT_STATE) | |
375 | return; | |
376 | dev_err(DEV, "State change failed: %s\n", drbd_set_st_err_str(err)); | |
377 | print_st(mdev, " state", os); | |
378 | print_st(mdev, "wanted", ns); | |
379 | } | |
380 | ||
435693e8 | 381 | static long print_state_change(char *pb, union drbd_state os, union drbd_state ns, |
bbeb641c PR |
382 | enum chg_state_flags flags) |
383 | { | |
435693e8 | 384 | char *pbp; |
bbeb641c PR |
385 | pbp = pb; |
386 | *pbp = 0; | |
435693e8 | 387 | if (ns.role != os.role && flags & CS_DC_ROLE) |
bbeb641c PR |
388 | pbp += sprintf(pbp, "role( %s -> %s ) ", |
389 | drbd_role_str(os.role), | |
390 | drbd_role_str(ns.role)); | |
435693e8 | 391 | if (ns.peer != os.peer && flags & CS_DC_PEER) |
bbeb641c PR |
392 | pbp += sprintf(pbp, "peer( %s -> %s ) ", |
393 | drbd_role_str(os.peer), | |
394 | drbd_role_str(ns.peer)); | |
435693e8 | 395 | if (ns.conn != os.conn && flags & CS_DC_CONN) |
bbeb641c PR |
396 | pbp += sprintf(pbp, "conn( %s -> %s ) ", |
397 | drbd_conn_str(os.conn), | |
398 | drbd_conn_str(ns.conn)); | |
435693e8 | 399 | if (ns.disk != os.disk && flags & CS_DC_DISK) |
bbeb641c PR |
400 | pbp += sprintf(pbp, "disk( %s -> %s ) ", |
401 | drbd_disk_str(os.disk), | |
402 | drbd_disk_str(ns.disk)); | |
435693e8 | 403 | if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK) |
bbeb641c PR |
404 | pbp += sprintf(pbp, "pdsk( %s -> %s ) ", |
405 | drbd_disk_str(os.pdsk), | |
406 | drbd_disk_str(ns.pdsk)); | |
407 | if (is_susp(ns) != is_susp(os)) | |
408 | pbp += sprintf(pbp, "susp( %d -> %d ) ", | |
409 | is_susp(os), | |
410 | is_susp(ns)); | |
411 | if (ns.aftr_isp != os.aftr_isp) | |
412 | pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ", | |
413 | os.aftr_isp, | |
414 | ns.aftr_isp); | |
415 | if (ns.peer_isp != os.peer_isp) | |
416 | pbp += sprintf(pbp, "peer_isp( %d -> %d ) ", | |
417 | os.peer_isp, | |
418 | ns.peer_isp); | |
419 | if (ns.user_isp != os.user_isp) | |
420 | pbp += sprintf(pbp, "user_isp( %d -> %d ) ", | |
421 | os.user_isp, | |
422 | ns.user_isp); | |
435693e8 PR |
423 | |
424 | return pbp - pb; | |
425 | } | |
426 | ||
427 | static void drbd_pr_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns, | |
428 | enum chg_state_flags flags) | |
429 | { | |
430 | char pb[300]; | |
431 | ||
432 | if (print_state_change(pb, os, ns, flags ^ CS_DC_MASK)) | |
bbeb641c PR |
433 | dev_info(DEV, "%s\n", pb); |
434 | } | |
b8907339 | 435 | |
435693e8 PR |
436 | static void conn_pr_state_change(struct drbd_tconn *tconn, union drbd_state os, union drbd_state ns, |
437 | enum chg_state_flags flags) | |
438 | { | |
439 | char pb[300]; | |
440 | ||
441 | if (print_state_change(pb, os, ns, flags)) | |
442 | conn_info(tconn, "%s\n", pb); | |
443 | } | |
444 | ||
445 | ||
b8907339 PR |
446 | /** |
447 | * is_valid_state() - Returns an SS_ error code if ns is not valid | |
448 | * @mdev: DRBD device. | |
449 | * @ns: State to consider. | |
450 | */ | |
451 | static enum drbd_state_rv | |
452 | is_valid_state(struct drbd_conf *mdev, union drbd_state ns) | |
453 | { | |
454 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
455 | ||
456 | enum drbd_fencing_p fp; | |
457 | enum drbd_state_rv rv = SS_SUCCESS; | |
458 | ||
459 | fp = FP_DONT_CARE; | |
460 | if (get_ldev(mdev)) { | |
461 | fp = mdev->ldev->dc.fencing; | |
462 | put_ldev(mdev); | |
463 | } | |
464 | ||
465 | if (get_net_conf(mdev->tconn)) { | |
047e95e2 PR |
466 | if (!mdev->tconn->net_conf->two_primaries && ns.role == R_PRIMARY) { |
467 | if (ns.peer == R_PRIMARY) | |
468 | rv = SS_TWO_PRIMARIES; | |
cb703454 | 469 | else if (conn_highest_peer(mdev->tconn) == R_PRIMARY) |
047e95e2 PR |
470 | rv = SS_O_VOL_PEER_PRI; |
471 | } | |
b8907339 PR |
472 | put_net_conf(mdev->tconn); |
473 | } | |
474 | ||
475 | if (rv <= 0) | |
476 | /* already found a reason to abort */; | |
477 | else if (ns.role == R_SECONDARY && mdev->open_cnt) | |
478 | rv = SS_DEVICE_IN_USE; | |
479 | ||
480 | else if (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.disk < D_UP_TO_DATE) | |
481 | rv = SS_NO_UP_TO_DATE_DISK; | |
482 | ||
483 | else if (fp >= FP_RESOURCE && | |
484 | ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk >= D_UNKNOWN) | |
485 | rv = SS_PRIMARY_NOP; | |
486 | ||
487 | else if (ns.role == R_PRIMARY && ns.disk <= D_INCONSISTENT && ns.pdsk <= D_INCONSISTENT) | |
488 | rv = SS_NO_UP_TO_DATE_DISK; | |
489 | ||
490 | else if (ns.conn > C_CONNECTED && ns.disk < D_INCONSISTENT) | |
491 | rv = SS_NO_LOCAL_DISK; | |
492 | ||
493 | else if (ns.conn > C_CONNECTED && ns.pdsk < D_INCONSISTENT) | |
494 | rv = SS_NO_REMOTE_DISK; | |
495 | ||
496 | else if (ns.conn > C_CONNECTED && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) | |
497 | rv = SS_NO_UP_TO_DATE_DISK; | |
498 | ||
499 | else if ((ns.conn == C_CONNECTED || | |
500 | ns.conn == C_WF_BITMAP_S || | |
501 | ns.conn == C_SYNC_SOURCE || | |
502 | ns.conn == C_PAUSED_SYNC_S) && | |
503 | ns.disk == D_OUTDATED) | |
504 | rv = SS_CONNECTED_OUTDATES; | |
505 | ||
506 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
f399002e | 507 | (mdev->tconn->net_conf->verify_alg[0] == 0)) |
b8907339 PR |
508 | rv = SS_NO_VERIFY_ALG; |
509 | ||
510 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
511 | mdev->tconn->agreed_pro_version < 88) | |
512 | rv = SS_NOT_SUPPORTED; | |
513 | ||
514 | else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN) | |
515 | rv = SS_CONNECTED_OUTDATES; | |
516 | ||
517 | return rv; | |
518 | } | |
519 | ||
520 | /** | |
a75f34ad | 521 | * is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible |
3509502d PR |
522 | * This function limits state transitions that may be declined by DRBD. I.e. |
523 | * user requests (aka soft transitions). | |
b8907339 PR |
524 | * @mdev: DRBD device. |
525 | * @ns: new state. | |
526 | * @os: old state. | |
527 | */ | |
528 | static enum drbd_state_rv | |
a75f34ad | 529 | is_valid_soft_transition(union drbd_state os, union drbd_state ns) |
b8907339 PR |
530 | { |
531 | enum drbd_state_rv rv = SS_SUCCESS; | |
532 | ||
533 | if ((ns.conn == C_STARTING_SYNC_T || ns.conn == C_STARTING_SYNC_S) && | |
534 | os.conn > C_CONNECTED) | |
535 | rv = SS_RESYNC_RUNNING; | |
536 | ||
537 | if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE) | |
538 | rv = SS_ALREADY_STANDALONE; | |
539 | ||
540 | if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS) | |
541 | rv = SS_IS_DISKLESS; | |
542 | ||
543 | if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED) | |
544 | rv = SS_NO_NET_CONFIG; | |
545 | ||
546 | if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING) | |
547 | rv = SS_LOWER_THAN_OUTDATED; | |
548 | ||
549 | if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED) | |
550 | rv = SS_IN_TRANSIENT_STATE; | |
551 | ||
2325eb66 PR |
552 | /* if (ns.conn == os.conn && ns.conn == C_WF_REPORT_PARAMS) |
553 | rv = SS_IN_TRANSIENT_STATE; */ | |
b8907339 PR |
554 | |
555 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED) | |
556 | rv = SS_NEED_CONNECTION; | |
557 | ||
558 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
559 | ns.conn != os.conn && os.conn > C_CONNECTED) | |
560 | rv = SS_RESYNC_RUNNING; | |
561 | ||
562 | if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) && | |
563 | os.conn < C_CONNECTED) | |
564 | rv = SS_NEED_CONNECTION; | |
565 | ||
566 | if ((ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE) | |
567 | && os.conn < C_WF_REPORT_PARAMS) | |
568 | rv = SS_NEED_CONNECTION; /* No NetworkFailure -> SyncTarget etc... */ | |
569 | ||
570 | return rv; | |
571 | } | |
572 | ||
3509502d | 573 | static enum drbd_state_rv |
fda74117 | 574 | is_valid_conn_transition(enum drbd_conns oc, enum drbd_conns nc) |
3509502d PR |
575 | { |
576 | enum drbd_state_rv rv = SS_SUCCESS; | |
577 | ||
578 | /* Disallow Network errors to configure a device's network part */ | |
fda74117 | 579 | if ((nc >= C_TIMEOUT && nc <= C_TEAR_DOWN) && oc <= C_DISCONNECTING) |
3509502d PR |
580 | rv = SS_NEED_CONNECTION; |
581 | ||
582 | /* After a network error only C_UNCONNECTED or C_DISCONNECTING may follow. */ | |
fda74117 | 583 | if (oc >= C_TIMEOUT && oc <= C_TEAR_DOWN && nc != C_UNCONNECTED && nc != C_DISCONNECTING) |
3509502d PR |
584 | rv = SS_IN_TRANSIENT_STATE; |
585 | ||
586 | /* After C_DISCONNECTING only C_STANDALONE may follow */ | |
fda74117 | 587 | if (oc == C_DISCONNECTING && nc != C_STANDALONE) |
3509502d PR |
588 | rv = SS_IN_TRANSIENT_STATE; |
589 | ||
fda74117 PR |
590 | return rv; |
591 | } | |
592 | ||
593 | ||
594 | /** | |
595 | * is_valid_transition() - Returns an SS_ error code if the state transition is not possible | |
596 | * This limits hard state transitions. Hard state transitions are facts there are | |
597 | * imposed on DRBD by the environment. E.g. disk broke or network broke down. | |
598 | * But those hard state transitions are still not allowed to do everything. | |
599 | * @ns: new state. | |
600 | * @os: old state. | |
601 | */ | |
602 | static enum drbd_state_rv | |
603 | is_valid_transition(union drbd_state os, union drbd_state ns) | |
604 | { | |
605 | enum drbd_state_rv rv; | |
606 | ||
607 | rv = is_valid_conn_transition(os.conn, ns.conn); | |
608 | ||
3509502d PR |
609 | /* we cannot fail (again) if we already detached */ |
610 | if (ns.disk == D_FAILED && os.disk == D_DISKLESS) | |
611 | rv = SS_IS_DISKLESS; | |
612 | ||
4308a0a3 PR |
613 | /* if we are only D_ATTACHING yet, |
614 | * we can (and should) go directly to D_DISKLESS. */ | |
615 | if (ns.disk == D_FAILED && os.disk == D_ATTACHING) { | |
616 | printk("TODO: FIX ME\n"); | |
617 | rv = SS_IS_DISKLESS; | |
618 | } | |
619 | ||
3509502d PR |
620 | return rv; |
621 | } | |
622 | ||
b8907339 PR |
623 | /** |
624 | * sanitize_state() - Resolves implicitly necessary additional changes to a state transition | |
625 | * @mdev: DRBD device. | |
626 | * @os: old state. | |
627 | * @ns: new state. | |
628 | * @warn_sync_abort: | |
629 | * | |
630 | * When we loose connection, we have to set the state of the peers disk (pdsk) | |
631 | * to D_UNKNOWN. This rule and many more along those lines are in this function. | |
632 | */ | |
4308a0a3 PR |
633 | static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns, |
634 | const char **warn_sync_abort) | |
b8907339 PR |
635 | { |
636 | enum drbd_fencing_p fp; | |
637 | enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max; | |
638 | ||
639 | fp = FP_DONT_CARE; | |
640 | if (get_ldev(mdev)) { | |
641 | fp = mdev->ldev->dc.fencing; | |
642 | put_ldev(mdev); | |
643 | } | |
644 | ||
3509502d | 645 | /* Implications from connection to peer and peer_isp */ |
b8907339 PR |
646 | if (ns.conn < C_CONNECTED) { |
647 | ns.peer_isp = 0; | |
648 | ns.peer = R_UNKNOWN; | |
649 | if (ns.pdsk > D_UNKNOWN || ns.pdsk < D_INCONSISTENT) | |
650 | ns.pdsk = D_UNKNOWN; | |
651 | } | |
652 | ||
653 | /* Clear the aftr_isp when becoming unconfigured */ | |
654 | if (ns.conn == C_STANDALONE && ns.disk == D_DISKLESS && ns.role == R_SECONDARY) | |
655 | ns.aftr_isp = 0; | |
656 | ||
4308a0a3 | 657 | /* An implication of the disk states onto the connection state */ |
b8907339 | 658 | /* Abort resync if a disk fails/detaches */ |
4308a0a3 | 659 | if (ns.conn > C_CONNECTED && (ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) { |
b8907339 PR |
660 | if (warn_sync_abort) |
661 | *warn_sync_abort = | |
4308a0a3 | 662 | ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ? |
b8907339 PR |
663 | "Online-verify" : "Resync"; |
664 | ns.conn = C_CONNECTED; | |
665 | } | |
666 | ||
667 | /* Connection breaks down before we finished "Negotiating" */ | |
668 | if (ns.conn < C_CONNECTED && ns.disk == D_NEGOTIATING && | |
669 | get_ldev_if_state(mdev, D_NEGOTIATING)) { | |
670 | if (mdev->ed_uuid == mdev->ldev->md.uuid[UI_CURRENT]) { | |
671 | ns.disk = mdev->new_state_tmp.disk; | |
672 | ns.pdsk = mdev->new_state_tmp.pdsk; | |
673 | } else { | |
674 | dev_alert(DEV, "Connection lost while negotiating, no data!\n"); | |
675 | ns.disk = D_DISKLESS; | |
676 | ns.pdsk = D_UNKNOWN; | |
677 | } | |
678 | put_ldev(mdev); | |
679 | } | |
680 | ||
681 | /* D_CONSISTENT and D_OUTDATED vanish when we get connected */ | |
682 | if (ns.conn >= C_CONNECTED && ns.conn < C_AHEAD) { | |
683 | if (ns.disk == D_CONSISTENT || ns.disk == D_OUTDATED) | |
684 | ns.disk = D_UP_TO_DATE; | |
685 | if (ns.pdsk == D_CONSISTENT || ns.pdsk == D_OUTDATED) | |
686 | ns.pdsk = D_UP_TO_DATE; | |
687 | } | |
688 | ||
689 | /* Implications of the connection stat on the disk states */ | |
690 | disk_min = D_DISKLESS; | |
691 | disk_max = D_UP_TO_DATE; | |
692 | pdsk_min = D_INCONSISTENT; | |
693 | pdsk_max = D_UNKNOWN; | |
694 | switch ((enum drbd_conns)ns.conn) { | |
695 | case C_WF_BITMAP_T: | |
696 | case C_PAUSED_SYNC_T: | |
697 | case C_STARTING_SYNC_T: | |
698 | case C_WF_SYNC_UUID: | |
699 | case C_BEHIND: | |
700 | disk_min = D_INCONSISTENT; | |
701 | disk_max = D_OUTDATED; | |
702 | pdsk_min = D_UP_TO_DATE; | |
703 | pdsk_max = D_UP_TO_DATE; | |
704 | break; | |
705 | case C_VERIFY_S: | |
706 | case C_VERIFY_T: | |
707 | disk_min = D_UP_TO_DATE; | |
708 | disk_max = D_UP_TO_DATE; | |
709 | pdsk_min = D_UP_TO_DATE; | |
710 | pdsk_max = D_UP_TO_DATE; | |
711 | break; | |
712 | case C_CONNECTED: | |
713 | disk_min = D_DISKLESS; | |
714 | disk_max = D_UP_TO_DATE; | |
715 | pdsk_min = D_DISKLESS; | |
716 | pdsk_max = D_UP_TO_DATE; | |
717 | break; | |
718 | case C_WF_BITMAP_S: | |
719 | case C_PAUSED_SYNC_S: | |
720 | case C_STARTING_SYNC_S: | |
721 | case C_AHEAD: | |
722 | disk_min = D_UP_TO_DATE; | |
723 | disk_max = D_UP_TO_DATE; | |
724 | pdsk_min = D_INCONSISTENT; | |
725 | pdsk_max = D_CONSISTENT; /* D_OUTDATED would be nice. But explicit outdate necessary*/ | |
726 | break; | |
727 | case C_SYNC_TARGET: | |
728 | disk_min = D_INCONSISTENT; | |
729 | disk_max = D_INCONSISTENT; | |
730 | pdsk_min = D_UP_TO_DATE; | |
731 | pdsk_max = D_UP_TO_DATE; | |
732 | break; | |
733 | case C_SYNC_SOURCE: | |
734 | disk_min = D_UP_TO_DATE; | |
735 | disk_max = D_UP_TO_DATE; | |
736 | pdsk_min = D_INCONSISTENT; | |
737 | pdsk_max = D_INCONSISTENT; | |
738 | break; | |
739 | case C_STANDALONE: | |
740 | case C_DISCONNECTING: | |
741 | case C_UNCONNECTED: | |
742 | case C_TIMEOUT: | |
743 | case C_BROKEN_PIPE: | |
744 | case C_NETWORK_FAILURE: | |
745 | case C_PROTOCOL_ERROR: | |
746 | case C_TEAR_DOWN: | |
747 | case C_WF_CONNECTION: | |
748 | case C_WF_REPORT_PARAMS: | |
749 | case C_MASK: | |
750 | break; | |
751 | } | |
752 | if (ns.disk > disk_max) | |
753 | ns.disk = disk_max; | |
754 | ||
755 | if (ns.disk < disk_min) { | |
756 | dev_warn(DEV, "Implicitly set disk from %s to %s\n", | |
757 | drbd_disk_str(ns.disk), drbd_disk_str(disk_min)); | |
758 | ns.disk = disk_min; | |
759 | } | |
760 | if (ns.pdsk > pdsk_max) | |
761 | ns.pdsk = pdsk_max; | |
762 | ||
763 | if (ns.pdsk < pdsk_min) { | |
764 | dev_warn(DEV, "Implicitly set pdsk from %s to %s\n", | |
765 | drbd_disk_str(ns.pdsk), drbd_disk_str(pdsk_min)); | |
766 | ns.pdsk = pdsk_min; | |
767 | } | |
768 | ||
769 | if (fp == FP_STONITH && | |
4308a0a3 | 770 | (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED)) |
b8907339 PR |
771 | ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */ |
772 | ||
f399002e | 773 | if (mdev->tconn->res_opts.on_no_data == OND_SUSPEND_IO && |
4308a0a3 | 774 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) |
b8907339 PR |
775 | ns.susp_nod = 1; /* Suspend IO while no data available (no accessible data available) */ |
776 | ||
777 | if (ns.aftr_isp || ns.peer_isp || ns.user_isp) { | |
778 | if (ns.conn == C_SYNC_SOURCE) | |
779 | ns.conn = C_PAUSED_SYNC_S; | |
780 | if (ns.conn == C_SYNC_TARGET) | |
781 | ns.conn = C_PAUSED_SYNC_T; | |
782 | } else { | |
783 | if (ns.conn == C_PAUSED_SYNC_S) | |
784 | ns.conn = C_SYNC_SOURCE; | |
785 | if (ns.conn == C_PAUSED_SYNC_T) | |
786 | ns.conn = C_SYNC_TARGET; | |
787 | } | |
788 | ||
789 | return ns; | |
790 | } | |
791 | ||
792 | void drbd_resume_al(struct drbd_conf *mdev) | |
793 | { | |
794 | if (test_and_clear_bit(AL_SUSPENDED, &mdev->flags)) | |
795 | dev_info(DEV, "Resumed AL updates\n"); | |
796 | } | |
797 | ||
798 | /* helper for __drbd_set_state */ | |
799 | static void set_ov_position(struct drbd_conf *mdev, enum drbd_conns cs) | |
800 | { | |
801 | if (mdev->tconn->agreed_pro_version < 90) | |
802 | mdev->ov_start_sector = 0; | |
803 | mdev->rs_total = drbd_bm_bits(mdev); | |
804 | mdev->ov_position = 0; | |
805 | if (cs == C_VERIFY_T) { | |
806 | /* starting online verify from an arbitrary position | |
807 | * does not fit well into the existing protocol. | |
808 | * on C_VERIFY_T, we initialize ov_left and friends | |
809 | * implicitly in receive_DataRequest once the | |
810 | * first P_OV_REQUEST is received */ | |
811 | mdev->ov_start_sector = ~(sector_t)0; | |
812 | } else { | |
813 | unsigned long bit = BM_SECT_TO_BIT(mdev->ov_start_sector); | |
814 | if (bit >= mdev->rs_total) { | |
815 | mdev->ov_start_sector = | |
816 | BM_BIT_TO_SECT(mdev->rs_total - 1); | |
817 | mdev->rs_total = 1; | |
818 | } else | |
819 | mdev->rs_total -= bit; | |
820 | mdev->ov_position = mdev->ov_start_sector; | |
821 | } | |
822 | mdev->ov_left = mdev->rs_total; | |
823 | } | |
824 | ||
825 | /** | |
826 | * __drbd_set_state() - Set a new DRBD state | |
827 | * @mdev: DRBD device. | |
828 | * @ns: new state. | |
829 | * @flags: Flags | |
830 | * @done: Optional completion, that will get completed after the after_state_ch() finished | |
831 | * | |
832 | * Caller needs to hold req_lock, and global_state_lock. Do not call directly. | |
833 | */ | |
834 | enum drbd_state_rv | |
835 | __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns, | |
836 | enum chg_state_flags flags, struct completion *done) | |
837 | { | |
838 | union drbd_state os; | |
839 | enum drbd_state_rv rv = SS_SUCCESS; | |
840 | const char *warn_sync_abort = NULL; | |
841 | struct after_state_chg_work *ascw; | |
842 | ||
78bae59b | 843 | os = drbd_read_state(mdev); |
b8907339 | 844 | |
4308a0a3 | 845 | ns = sanitize_state(mdev, ns, &warn_sync_abort); |
b8907339 PR |
846 | if (ns.i == os.i) |
847 | return SS_NOTHING_TO_DO; | |
848 | ||
3509502d PR |
849 | rv = is_valid_transition(os, ns); |
850 | if (rv < SS_SUCCESS) | |
851 | return rv; | |
852 | ||
b8907339 PR |
853 | if (!(flags & CS_HARD)) { |
854 | /* pre-state-change checks ; only look at ns */ | |
855 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
856 | ||
857 | rv = is_valid_state(mdev, ns); | |
858 | if (rv < SS_SUCCESS) { | |
859 | /* If the old state was illegal as well, then let | |
860 | this happen...*/ | |
861 | ||
862 | if (is_valid_state(mdev, os) == rv) | |
a75f34ad | 863 | rv = is_valid_soft_transition(os, ns); |
b8907339 | 864 | } else |
a75f34ad | 865 | rv = is_valid_soft_transition(os, ns); |
b8907339 PR |
866 | } |
867 | ||
868 | if (rv < SS_SUCCESS) { | |
869 | if (flags & CS_VERBOSE) | |
870 | print_st_err(mdev, os, ns, rv); | |
871 | return rv; | |
872 | } | |
873 | ||
874 | if (warn_sync_abort) | |
875 | dev_warn(DEV, "%s aborted.\n", warn_sync_abort); | |
876 | ||
435693e8 | 877 | drbd_pr_state_change(mdev, os, ns, flags); |
b8907339 | 878 | |
b8907339 PR |
879 | /* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference |
880 | * on the ldev here, to be sure the transition -> D_DISKLESS resp. | |
881 | * drbd_ldev_destroy() won't happen before our corresponding | |
882 | * after_state_ch works run, where we put_ldev again. */ | |
883 | if ((os.disk != D_FAILED && ns.disk == D_FAILED) || | |
884 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS)) | |
885 | atomic_inc(&mdev->local_cnt); | |
886 | ||
da9fbc27 | 887 | mdev->state.i = ns.i; |
8e0af25f PR |
888 | mdev->tconn->susp = ns.susp; |
889 | mdev->tconn->susp_nod = ns.susp_nod; | |
890 | mdev->tconn->susp_fen = ns.susp_fen; | |
b8907339 | 891 | |
0e29d163 PR |
892 | /* solve the race between becoming unconfigured, |
893 | * worker doing the cleanup, and | |
894 | * admin reconfiguring us: | |
895 | * on (re)configure, first set CONFIG_PENDING, | |
896 | * then wait for a potentially exiting worker, | |
897 | * start the worker, and schedule one no_op. | |
898 | * then proceed with configuration. | |
899 | */ | |
900 | if(conn_all_vols_unconf(mdev->tconn) && | |
901 | !test_and_set_bit(CONFIG_PENDING, &mdev->tconn->flags)) | |
902 | set_bit(OBJECT_DYING, &mdev->tconn->flags); | |
903 | ||
b8907339 PR |
904 | if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING) |
905 | drbd_print_uuids(mdev, "attached to UUIDs"); | |
906 | ||
907 | wake_up(&mdev->misc_wait); | |
908 | wake_up(&mdev->state_wait); | |
2a67d8b9 | 909 | wake_up(&mdev->tconn->ping_wait); |
b8907339 PR |
910 | |
911 | /* aborted verify run. log the last position */ | |
912 | if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) && | |
913 | ns.conn < C_CONNECTED) { | |
914 | mdev->ov_start_sector = | |
915 | BM_BIT_TO_SECT(drbd_bm_bits(mdev) - mdev->ov_left); | |
916 | dev_info(DEV, "Online Verify reached sector %llu\n", | |
917 | (unsigned long long)mdev->ov_start_sector); | |
918 | } | |
919 | ||
920 | if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) && | |
921 | (ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)) { | |
922 | dev_info(DEV, "Syncer continues.\n"); | |
923 | mdev->rs_paused += (long)jiffies | |
924 | -(long)mdev->rs_mark_time[mdev->rs_last_mark]; | |
925 | if (ns.conn == C_SYNC_TARGET) | |
926 | mod_timer(&mdev->resync_timer, jiffies); | |
927 | } | |
928 | ||
929 | if ((os.conn == C_SYNC_TARGET || os.conn == C_SYNC_SOURCE) && | |
930 | (ns.conn == C_PAUSED_SYNC_T || ns.conn == C_PAUSED_SYNC_S)) { | |
931 | dev_info(DEV, "Resync suspended\n"); | |
932 | mdev->rs_mark_time[mdev->rs_last_mark] = jiffies; | |
933 | } | |
934 | ||
935 | if (os.conn == C_CONNECTED && | |
936 | (ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T)) { | |
937 | unsigned long now = jiffies; | |
938 | int i; | |
939 | ||
940 | set_ov_position(mdev, ns.conn); | |
941 | mdev->rs_start = now; | |
942 | mdev->rs_last_events = 0; | |
943 | mdev->rs_last_sect_ev = 0; | |
944 | mdev->ov_last_oos_size = 0; | |
945 | mdev->ov_last_oos_start = 0; | |
946 | ||
947 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { | |
948 | mdev->rs_mark_left[i] = mdev->ov_left; | |
949 | mdev->rs_mark_time[i] = now; | |
950 | } | |
951 | ||
952 | drbd_rs_controller_reset(mdev); | |
953 | ||
954 | if (ns.conn == C_VERIFY_S) { | |
955 | dev_info(DEV, "Starting Online Verify from sector %llu\n", | |
956 | (unsigned long long)mdev->ov_position); | |
957 | mod_timer(&mdev->resync_timer, jiffies); | |
958 | } | |
959 | } | |
960 | ||
961 | if (get_ldev(mdev)) { | |
962 | u32 mdf = mdev->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND| | |
963 | MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE| | |
964 | MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY); | |
965 | ||
966 | if (test_bit(CRASHED_PRIMARY, &mdev->flags)) | |
967 | mdf |= MDF_CRASHED_PRIMARY; | |
968 | if (mdev->state.role == R_PRIMARY || | |
969 | (mdev->state.pdsk < D_INCONSISTENT && mdev->state.peer == R_PRIMARY)) | |
970 | mdf |= MDF_PRIMARY_IND; | |
971 | if (mdev->state.conn > C_WF_REPORT_PARAMS) | |
972 | mdf |= MDF_CONNECTED_IND; | |
973 | if (mdev->state.disk > D_INCONSISTENT) | |
974 | mdf |= MDF_CONSISTENT; | |
975 | if (mdev->state.disk > D_OUTDATED) | |
976 | mdf |= MDF_WAS_UP_TO_DATE; | |
977 | if (mdev->state.pdsk <= D_OUTDATED && mdev->state.pdsk >= D_INCONSISTENT) | |
978 | mdf |= MDF_PEER_OUT_DATED; | |
979 | if (mdf != mdev->ldev->md.flags) { | |
980 | mdev->ldev->md.flags = mdf; | |
981 | drbd_md_mark_dirty(mdev); | |
982 | } | |
983 | if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT) | |
984 | drbd_set_ed_uuid(mdev, mdev->ldev->md.uuid[UI_CURRENT]); | |
985 | put_ldev(mdev); | |
986 | } | |
987 | ||
988 | /* Peer was forced D_UP_TO_DATE & R_PRIMARY, consider to resync */ | |
989 | if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT && | |
990 | os.peer == R_SECONDARY && ns.peer == R_PRIMARY) | |
991 | set_bit(CONSIDER_RESYNC, &mdev->flags); | |
992 | ||
993 | /* Receiver should clean up itself */ | |
994 | if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING) | |
995 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
996 | ||
997 | /* Now the receiver finished cleaning up itself, it should die */ | |
998 | if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE) | |
999 | drbd_thread_stop_nowait(&mdev->tconn->receiver); | |
1000 | ||
1001 | /* Upon network failure, we need to restart the receiver. */ | |
1002 | if (os.conn > C_TEAR_DOWN && | |
1003 | ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT) | |
1004 | drbd_thread_restart_nowait(&mdev->tconn->receiver); | |
1005 | ||
1006 | /* Resume AL writing if we get a connection */ | |
1007 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
1008 | drbd_resume_al(mdev); | |
1009 | ||
1010 | ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC); | |
1011 | if (ascw) { | |
1012 | ascw->os = os; | |
1013 | ascw->ns = ns; | |
1014 | ascw->flags = flags; | |
1015 | ascw->w.cb = w_after_state_ch; | |
a21e9298 | 1016 | ascw->w.mdev = mdev; |
b8907339 PR |
1017 | ascw->done = done; |
1018 | drbd_queue_work(&mdev->tconn->data.work, &ascw->w); | |
1019 | } else { | |
bbeb641c | 1020 | dev_err(DEV, "Could not kmalloc an ascw\n"); |
b8907339 PR |
1021 | } |
1022 | ||
1023 | return rv; | |
1024 | } | |
1025 | ||
99920dc5 | 1026 | static int w_after_state_ch(struct drbd_work *w, int unused) |
b8907339 PR |
1027 | { |
1028 | struct after_state_chg_work *ascw = | |
1029 | container_of(w, struct after_state_chg_work, w); | |
00d56944 | 1030 | struct drbd_conf *mdev = w->mdev; |
b8907339 PR |
1031 | |
1032 | after_state_ch(mdev, ascw->os, ascw->ns, ascw->flags); | |
1033 | if (ascw->flags & CS_WAIT_COMPLETE) { | |
1034 | D_ASSERT(ascw->done != NULL); | |
1035 | complete(ascw->done); | |
1036 | } | |
1037 | kfree(ascw); | |
1038 | ||
99920dc5 | 1039 | return 0; |
b8907339 PR |
1040 | } |
1041 | ||
1042 | static void abw_start_sync(struct drbd_conf *mdev, int rv) | |
1043 | { | |
1044 | if (rv) { | |
1045 | dev_err(DEV, "Writing the bitmap failed not starting resync.\n"); | |
1046 | _drbd_request_state(mdev, NS(conn, C_CONNECTED), CS_VERBOSE); | |
1047 | return; | |
1048 | } | |
1049 | ||
1050 | switch (mdev->state.conn) { | |
1051 | case C_STARTING_SYNC_T: | |
1052 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE); | |
1053 | break; | |
1054 | case C_STARTING_SYNC_S: | |
1055 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1056 | break; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | int drbd_bitmap_io_from_worker(struct drbd_conf *mdev, | |
1061 | int (*io_fn)(struct drbd_conf *), | |
1062 | char *why, enum bm_flag flags) | |
1063 | { | |
1064 | int rv; | |
1065 | ||
1066 | D_ASSERT(current == mdev->tconn->worker.task); | |
1067 | ||
1068 | /* open coded non-blocking drbd_suspend_io(mdev); */ | |
1069 | set_bit(SUSPEND_IO, &mdev->flags); | |
1070 | ||
1071 | drbd_bm_lock(mdev, why, flags); | |
1072 | rv = io_fn(mdev); | |
1073 | drbd_bm_unlock(mdev); | |
1074 | ||
1075 | drbd_resume_io(mdev); | |
1076 | ||
1077 | return rv; | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * after_state_ch() - Perform after state change actions that may sleep | |
1082 | * @mdev: DRBD device. | |
1083 | * @os: old state. | |
1084 | * @ns: new state. | |
1085 | * @flags: Flags | |
1086 | */ | |
1087 | static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, | |
1088 | union drbd_state ns, enum chg_state_flags flags) | |
1089 | { | |
1090 | enum drbd_fencing_p fp; | |
1091 | enum drbd_req_event what = NOTHING; | |
69f5ec72 | 1092 | union drbd_state nsm; |
3b98c0c2 LE |
1093 | struct sib_info sib; |
1094 | ||
1095 | sib.sib_reason = SIB_STATE_CHANGE; | |
1096 | sib.os = os; | |
1097 | sib.ns = ns; | |
b8907339 PR |
1098 | |
1099 | if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) { | |
1100 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1101 | if (mdev->p_uuid) | |
1102 | mdev->p_uuid[UI_FLAGS] &= ~((u64)2); | |
1103 | } | |
1104 | ||
1105 | fp = FP_DONT_CARE; | |
1106 | if (get_ldev(mdev)) { | |
1107 | fp = mdev->ldev->dc.fencing; | |
1108 | put_ldev(mdev); | |
1109 | } | |
1110 | ||
1111 | /* Inform userspace about the change... */ | |
3b98c0c2 | 1112 | drbd_bcast_event(mdev, &sib); |
b8907339 PR |
1113 | |
1114 | if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) && | |
1115 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) | |
1116 | drbd_khelper(mdev, "pri-on-incon-degr"); | |
1117 | ||
1118 | /* Here we have the actions that are performed after a | |
1119 | state change. This function might sleep */ | |
1120 | ||
1121 | nsm.i = -1; | |
1122 | if (ns.susp_nod) { | |
1123 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) | |
1124 | what = RESEND; | |
1125 | ||
1126 | if (os.disk == D_ATTACHING && ns.disk > D_ATTACHING) | |
1127 | what = RESTART_FROZEN_DISK_IO; | |
1128 | ||
1129 | if (what != NOTHING) | |
1130 | nsm.susp_nod = 0; | |
1131 | } | |
1132 | ||
1133 | if (ns.susp_fen) { | |
1134 | /* case1: The outdate peer handler is successful: */ | |
1135 | if (os.pdsk > D_OUTDATED && ns.pdsk <= D_OUTDATED) { | |
2f5cdd0b | 1136 | tl_clear(mdev->tconn); |
b8907339 PR |
1137 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
1138 | drbd_uuid_new_current(mdev); | |
1139 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1140 | } | |
1141 | spin_lock_irq(&mdev->tconn->req_lock); | |
1142 | _drbd_set_state(_NS(mdev, susp_fen, 0), CS_VERBOSE, NULL); | |
1143 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1144 | } | |
1145 | /* case2: The connection was established again: */ | |
1146 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { | |
1147 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
1148 | what = RESEND; | |
1149 | nsm.susp_fen = 0; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | if (what != NOTHING) { | |
1154 | spin_lock_irq(&mdev->tconn->req_lock); | |
2f5cdd0b | 1155 | _tl_restart(mdev->tconn, what); |
b8907339 PR |
1156 | nsm.i &= mdev->state.i; |
1157 | _drbd_set_state(mdev, nsm, CS_VERBOSE, NULL); | |
1158 | spin_unlock_irq(&mdev->tconn->req_lock); | |
1159 | } | |
1160 | ||
1161 | /* Became sync source. With protocol >= 96, we still need to send out | |
1162 | * the sync uuid now. Need to do that before any drbd_send_state, or | |
1163 | * the other side may go "paused sync" before receiving the sync uuids, | |
1164 | * which is unexpected. */ | |
1165 | if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) && | |
1166 | (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) && | |
1167 | mdev->tconn->agreed_pro_version >= 96 && get_ldev(mdev)) { | |
1168 | drbd_gen_and_send_sync_uuid(mdev); | |
1169 | put_ldev(mdev); | |
1170 | } | |
1171 | ||
1172 | /* Do not change the order of the if above and the two below... */ | |
1173 | if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */ | |
1174 | drbd_send_uuids(mdev); | |
1175 | drbd_send_state(mdev); | |
1176 | } | |
1177 | /* No point in queuing send_bitmap if we don't have a connection | |
1178 | * anymore, so check also the _current_ state, not only the new state | |
1179 | * at the time this work was queued. */ | |
1180 | if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S && | |
1181 | mdev->state.conn == C_WF_BITMAP_S) | |
1182 | drbd_queue_bitmap_io(mdev, &drbd_send_bitmap, NULL, | |
1183 | "send_bitmap (WFBitMapS)", | |
1184 | BM_LOCKED_TEST_ALLOWED); | |
1185 | ||
1186 | /* Lost contact to peer's copy of the data */ | |
1187 | if ((os.pdsk >= D_INCONSISTENT && | |
1188 | os.pdsk != D_UNKNOWN && | |
1189 | os.pdsk != D_OUTDATED) | |
1190 | && (ns.pdsk < D_INCONSISTENT || | |
1191 | ns.pdsk == D_UNKNOWN || | |
1192 | ns.pdsk == D_OUTDATED)) { | |
1193 | if (get_ldev(mdev)) { | |
1194 | if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) && | |
1195 | mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { | |
2aebfabb | 1196 | if (drbd_suspended(mdev)) { |
b8907339 PR |
1197 | set_bit(NEW_CUR_UUID, &mdev->flags); |
1198 | } else { | |
1199 | drbd_uuid_new_current(mdev); | |
1200 | drbd_send_uuids(mdev); | |
1201 | } | |
1202 | } | |
1203 | put_ldev(mdev); | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) { | |
1208 | if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) { | |
1209 | drbd_uuid_new_current(mdev); | |
1210 | drbd_send_uuids(mdev); | |
1211 | } | |
1212 | ||
1213 | /* D_DISKLESS Peer becomes secondary */ | |
1214 | if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY) | |
1215 | /* We may still be Primary ourselves. | |
1216 | * No harm done if the bitmap still changes, | |
1217 | * redirtied pages will follow later. */ | |
1218 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1219 | "demote diskless peer", BM_LOCKED_SET_ALLOWED); | |
1220 | put_ldev(mdev); | |
1221 | } | |
1222 | ||
1223 | /* Write out all changed bits on demote. | |
1224 | * Though, no need to da that just yet | |
1225 | * if there is a resync going on still */ | |
1226 | if (os.role == R_PRIMARY && ns.role == R_SECONDARY && | |
1227 | mdev->state.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1228 | /* No changes to the bitmap expected this time, so assert that, | |
1229 | * even though no harm was done if it did change. */ | |
1230 | drbd_bitmap_io_from_worker(mdev, &drbd_bm_write, | |
1231 | "demote", BM_LOCKED_TEST_ALLOWED); | |
1232 | put_ldev(mdev); | |
1233 | } | |
1234 | ||
1235 | /* Last part of the attaching process ... */ | |
1236 | if (ns.conn >= C_CONNECTED && | |
1237 | os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) { | |
1238 | drbd_send_sizes(mdev, 0, 0); /* to start sync... */ | |
1239 | drbd_send_uuids(mdev); | |
1240 | drbd_send_state(mdev); | |
1241 | } | |
1242 | ||
1243 | /* We want to pause/continue resync, tell peer. */ | |
1244 | if (ns.conn >= C_CONNECTED && | |
1245 | ((os.aftr_isp != ns.aftr_isp) || | |
1246 | (os.user_isp != ns.user_isp))) | |
1247 | drbd_send_state(mdev); | |
1248 | ||
1249 | /* In case one of the isp bits got set, suspend other devices. */ | |
1250 | if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) && | |
1251 | (ns.aftr_isp || ns.peer_isp || ns.user_isp)) | |
1252 | suspend_other_sg(mdev); | |
1253 | ||
1254 | /* Make sure the peer gets informed about eventual state | |
1255 | changes (ISP bits) while we were in WFReportParams. */ | |
1256 | if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED) | |
1257 | drbd_send_state(mdev); | |
1258 | ||
1259 | if (os.conn != C_AHEAD && ns.conn == C_AHEAD) | |
1260 | drbd_send_state(mdev); | |
1261 | ||
1262 | /* We are in the progress to start a full sync... */ | |
1263 | if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
1264 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S)) | |
1265 | /* no other bitmap changes expected during this phase */ | |
1266 | drbd_queue_bitmap_io(mdev, | |
1267 | &drbd_bmio_set_n_write, &abw_start_sync, | |
1268 | "set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED); | |
1269 | ||
1270 | /* We are invalidating our self... */ | |
1271 | if (os.conn < C_CONNECTED && ns.conn < C_CONNECTED && | |
1272 | os.disk > D_INCONSISTENT && ns.disk == D_INCONSISTENT) | |
1273 | /* other bitmap operation expected during this phase */ | |
1274 | drbd_queue_bitmap_io(mdev, &drbd_bmio_set_n_write, NULL, | |
1275 | "set_n_write from invalidate", BM_LOCKED_MASK); | |
1276 | ||
1277 | /* first half of local IO error, failure to attach, | |
1278 | * or administrative detach */ | |
1279 | if (os.disk != D_FAILED && ns.disk == D_FAILED) { | |
1280 | enum drbd_io_error_p eh; | |
1281 | int was_io_error; | |
1282 | /* corresponding get_ldev was in __drbd_set_state, to serialize | |
1283 | * our cleanup here with the transition to D_DISKLESS, | |
1284 | * so it is safe to dreference ldev here. */ | |
1285 | eh = mdev->ldev->dc.on_io_error; | |
1286 | was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags); | |
1287 | ||
1288 | /* current state still has to be D_FAILED, | |
1289 | * there is only one way out: to D_DISKLESS, | |
1290 | * and that may only happen after our put_ldev below. */ | |
1291 | if (mdev->state.disk != D_FAILED) | |
1292 | dev_err(DEV, | |
1293 | "ASSERT FAILED: disk is %s during detach\n", | |
1294 | drbd_disk_str(mdev->state.disk)); | |
1295 | ||
927036f9 | 1296 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1297 | dev_warn(DEV, "Notified peer that I am detaching my disk\n"); |
1298 | else | |
1299 | dev_err(DEV, "Sending state for detaching disk failed\n"); | |
1300 | ||
1301 | drbd_rs_cancel_all(mdev); | |
1302 | ||
1303 | /* In case we want to get something to stable storage still, | |
1304 | * this may be the last chance. | |
1305 | * Following put_ldev may transition to D_DISKLESS. */ | |
1306 | drbd_md_sync(mdev); | |
1307 | put_ldev(mdev); | |
1308 | ||
1309 | if (was_io_error && eh == EP_CALL_HELPER) | |
1310 | drbd_khelper(mdev, "local-io-error"); | |
1311 | } | |
1312 | ||
1313 | /* second half of local IO error, failure to attach, | |
1314 | * or administrative detach, | |
1315 | * after local_cnt references have reached zero again */ | |
1316 | if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) { | |
1317 | /* We must still be diskless, | |
1318 | * re-attach has to be serialized with this! */ | |
1319 | if (mdev->state.disk != D_DISKLESS) | |
1320 | dev_err(DEV, | |
1321 | "ASSERT FAILED: disk is %s while going diskless\n", | |
1322 | drbd_disk_str(mdev->state.disk)); | |
1323 | ||
1324 | mdev->rs_total = 0; | |
1325 | mdev->rs_failed = 0; | |
1326 | atomic_set(&mdev->rs_pending_cnt, 0); | |
1327 | ||
927036f9 | 1328 | if (!drbd_send_state(mdev)) |
b8907339 PR |
1329 | dev_warn(DEV, "Notified peer that I'm now diskless.\n"); |
1330 | /* corresponding get_ldev in __drbd_set_state | |
1331 | * this may finally trigger drbd_ldev_destroy. */ | |
1332 | put_ldev(mdev); | |
1333 | } | |
1334 | ||
1335 | /* Notify peer that I had a local IO error, and did not detached.. */ | |
1336 | if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT) | |
1337 | drbd_send_state(mdev); | |
1338 | ||
1339 | /* Disks got bigger while they were detached */ | |
1340 | if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING && | |
1341 | test_and_clear_bit(RESYNC_AFTER_NEG, &mdev->flags)) { | |
1342 | if (ns.conn == C_CONNECTED) | |
1343 | resync_after_online_grow(mdev); | |
1344 | } | |
1345 | ||
1346 | /* A resync finished or aborted, wake paused devices... */ | |
1347 | if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) || | |
1348 | (os.peer_isp && !ns.peer_isp) || | |
1349 | (os.user_isp && !ns.user_isp)) | |
1350 | resume_next_sg(mdev); | |
1351 | ||
1352 | /* sync target done with resync. Explicitly notify peer, even though | |
1353 | * it should (at least for non-empty resyncs) already know itself. */ | |
1354 | if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED) | |
1355 | drbd_send_state(mdev); | |
1356 | ||
1357 | /* This triggers bitmap writeout of potentially still unwritten pages | |
1358 | * if the resync finished cleanly, or aborted because of peer disk | |
1359 | * failure, or because of connection loss. | |
1360 | * For resync aborted because of local disk failure, we cannot do | |
1361 | * any bitmap writeout anymore. | |
1362 | * No harm done if some bits change during this phase. | |
1363 | */ | |
1364 | if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(mdev)) { | |
1365 | drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL, | |
1366 | "write from resync_finished", BM_LOCKED_SET_ALLOWED); | |
1367 | put_ldev(mdev); | |
1368 | } | |
1369 | ||
1370 | if (ns.disk == D_DISKLESS && | |
1371 | ns.conn == C_STANDALONE && | |
1372 | ns.role == R_SECONDARY) { | |
1373 | if (os.aftr_isp != ns.aftr_isp) | |
1374 | resume_next_sg(mdev); | |
1375 | } | |
1376 | ||
0e29d163 | 1377 | after_all_state_ch(mdev->tconn); |
bbeb641c | 1378 | |
b8907339 PR |
1379 | drbd_md_sync(mdev); |
1380 | } | |
1381 | ||
bbeb641c PR |
1382 | struct after_conn_state_chg_work { |
1383 | struct drbd_work w; | |
1384 | enum drbd_conns oc; | |
8c7e16c3 | 1385 | union drbd_state ns_min; |
5f082f98 | 1386 | union drbd_state ns_max; /* new, max state, over all mdevs */ |
bbeb641c PR |
1387 | enum chg_state_flags flags; |
1388 | }; | |
1389 | ||
0e29d163 | 1390 | static void after_all_state_ch(struct drbd_tconn *tconn) |
b8907339 | 1391 | { |
0e29d163 PR |
1392 | if (conn_all_vols_unconf(tconn) && |
1393 | test_bit(OBJECT_DYING, &tconn->flags)) { | |
bbeb641c PR |
1394 | drbd_thread_stop_nowait(&tconn->worker); |
1395 | } | |
1396 | } | |
1397 | ||
99920dc5 | 1398 | static int w_after_conn_state_ch(struct drbd_work *w, int unused) |
bbeb641c PR |
1399 | { |
1400 | struct after_conn_state_chg_work *acscw = | |
1401 | container_of(w, struct after_conn_state_chg_work, w); | |
1402 | struct drbd_tconn *tconn = w->tconn; | |
1403 | enum drbd_conns oc = acscw->oc; | |
5f082f98 | 1404 | union drbd_state ns_max = acscw->ns_max; |
bbeb641c PR |
1405 | |
1406 | kfree(acscw); | |
1407 | ||
b8907339 | 1408 | /* Upon network configuration, we need to start the receiver */ |
5f082f98 | 1409 | if (oc == C_STANDALONE && ns_max.conn == C_UNCONNECTED) |
b8907339 PR |
1410 | drbd_thread_start(&tconn->receiver); |
1411 | ||
bbeb641c | 1412 | //conn_err(tconn, STATE_FMT, STATE_ARGS("nms", nms)); |
0e29d163 | 1413 | after_all_state_ch(tconn); |
bbeb641c | 1414 | |
99920dc5 | 1415 | return 0; |
bbeb641c PR |
1416 | } |
1417 | ||
435693e8 | 1418 | void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum chg_state_flags *pf) |
88ef594e | 1419 | { |
435693e8 | 1420 | enum chg_state_flags flags = ~0; |
da9fbc27 | 1421 | union drbd_dev_state os, cs = {}; /* old_state, common_state */ |
88ef594e | 1422 | struct drbd_conf *mdev; |
435693e8 | 1423 | int vnr, first_vol = 1; |
88ef594e PR |
1424 | |
1425 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
1426 | os = mdev->state; | |
1427 | ||
435693e8 PR |
1428 | if (first_vol) { |
1429 | cs = os; | |
1430 | first_vol = 0; | |
1431 | continue; | |
1432 | } | |
1433 | ||
1434 | if (cs.role != os.role) | |
1435 | flags &= ~CS_DC_ROLE; | |
1436 | ||
1437 | if (cs.peer != os.peer) | |
1438 | flags &= ~CS_DC_PEER; | |
1439 | ||
1440 | if (cs.conn != os.conn) | |
1441 | flags &= ~CS_DC_CONN; | |
88ef594e | 1442 | |
435693e8 PR |
1443 | if (cs.disk != os.disk) |
1444 | flags &= ~CS_DC_DISK; | |
88ef594e | 1445 | |
435693e8 PR |
1446 | if (cs.pdsk != os.pdsk) |
1447 | flags &= ~CS_DC_PDSK; | |
1448 | } | |
1449 | ||
1450 | *pf |= CS_DC_MASK; | |
1451 | *pf &= flags; | |
da9fbc27 | 1452 | (*pcs).i = cs.i; |
88ef594e | 1453 | } |
bbeb641c | 1454 | |
bd0c824a PR |
1455 | static enum drbd_state_rv |
1456 | conn_is_valid_transition(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
88ef594e | 1457 | enum chg_state_flags flags) |
bbeb641c | 1458 | { |
bd0c824a | 1459 | enum drbd_state_rv rv = SS_SUCCESS; |
bbeb641c | 1460 | union drbd_state ns, os; |
bd0c824a PR |
1461 | struct drbd_conf *mdev; |
1462 | int vnr; | |
bbeb641c | 1463 | |
bd0c824a | 1464 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
78bae59b | 1465 | os = drbd_read_state(mdev); |
bd0c824a PR |
1466 | ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL); |
1467 | ||
778bcf2e PR |
1468 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
1469 | ns.disk = os.disk; | |
1470 | ||
bd0c824a PR |
1471 | if (ns.i == os.i) |
1472 | continue; | |
bbeb641c | 1473 | |
bd0c824a PR |
1474 | rv = is_valid_transition(os, ns); |
1475 | if (rv < SS_SUCCESS) | |
1476 | break; | |
1477 | ||
1478 | if (!(flags & CS_HARD)) { | |
1479 | rv = is_valid_state(mdev, ns); | |
1480 | if (rv < SS_SUCCESS) { | |
1481 | if (is_valid_state(mdev, os) == rv) | |
1482 | rv = is_valid_soft_transition(os, ns); | |
1483 | } else | |
1484 | rv = is_valid_soft_transition(os, ns); | |
1485 | } | |
1486 | if (rv < SS_SUCCESS) | |
1487 | break; | |
bbeb641c PR |
1488 | } |
1489 | ||
bd0c824a PR |
1490 | if (rv < SS_SUCCESS && flags & CS_VERBOSE) |
1491 | print_st_err(mdev, os, ns, rv); | |
1492 | ||
1493 | return rv; | |
bbeb641c PR |
1494 | } |
1495 | ||
8c7e16c3 | 1496 | void |
bd0c824a | 1497 | conn_set_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, |
8c7e16c3 | 1498 | union drbd_state *pns_min, union drbd_state *pns_max, enum chg_state_flags flags) |
bbeb641c | 1499 | { |
8c7e16c3 PR |
1500 | union drbd_state ns, os, ns_max = { }; |
1501 | union drbd_state ns_min = { | |
1502 | { .role = R_MASK, | |
1503 | .peer = R_MASK, | |
1504 | .disk = D_MASK, | |
1505 | .pdsk = D_MASK | |
1506 | } }; | |
bd0c824a | 1507 | struct drbd_conf *mdev; |
bbeb641c | 1508 | enum drbd_state_rv rv; |
bd0c824a | 1509 | int vnr; |
bbeb641c | 1510 | |
bd0c824a PR |
1511 | if (mask.conn == C_MASK) |
1512 | tconn->cstate = val.conn; | |
1513 | ||
1514 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
78bae59b | 1515 | os = drbd_read_state(mdev); |
bd0c824a PR |
1516 | ns = apply_mask_val(os, mask, val); |
1517 | ns = sanitize_state(mdev, ns, NULL); | |
bbeb641c | 1518 | |
778bcf2e PR |
1519 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
1520 | ns.disk = os.disk; | |
1521 | ||
bd0c824a PR |
1522 | rv = __drbd_set_state(mdev, ns, flags, NULL); |
1523 | if (rv < SS_SUCCESS) | |
1524 | BUG(); | |
bbeb641c | 1525 | |
8c7e16c3 PR |
1526 | ns.i = mdev->state.i; |
1527 | ns_max.role = max_role(ns.role, ns_max.role); | |
1528 | ns_max.peer = max_role(ns.peer, ns_max.peer); | |
1529 | ns_max.conn = max_t(enum drbd_conns, ns.conn, ns_max.conn); | |
1530 | ns_max.disk = max_t(enum drbd_disk_state, ns.disk, ns_max.disk); | |
1531 | ns_max.pdsk = max_t(enum drbd_disk_state, ns.pdsk, ns_max.pdsk); | |
1532 | ||
1533 | ns_min.role = min_role(ns.role, ns_min.role); | |
1534 | ns_min.peer = min_role(ns.peer, ns_min.peer); | |
1535 | ns_min.conn = min_t(enum drbd_conns, ns.conn, ns_min.conn); | |
1536 | ns_min.disk = min_t(enum drbd_disk_state, ns.disk, ns_min.disk); | |
1537 | ns_min.pdsk = min_t(enum drbd_disk_state, ns.pdsk, ns_min.pdsk); | |
bd0c824a | 1538 | } |
bbeb641c | 1539 | |
8c7e16c3 PR |
1540 | ns_min.susp = ns_max.susp = tconn->susp; |
1541 | ns_min.susp_nod = ns_max.susp_nod = tconn->susp_nod; | |
1542 | ns_min.susp_fen = ns_max.susp_fen = tconn->susp_fen; | |
1543 | ||
1544 | *pns_min = ns_min; | |
1545 | *pns_max = ns_max; | |
bbeb641c PR |
1546 | } |
1547 | ||
df24aa45 PR |
1548 | static enum drbd_state_rv |
1549 | _conn_rq_cond(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val) | |
1550 | { | |
df24aa45 PR |
1551 | enum drbd_state_rv rv; |
1552 | ||
1553 | if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &tconn->flags)) | |
1554 | return SS_CW_SUCCESS; | |
1555 | ||
1556 | if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &tconn->flags)) | |
1557 | return SS_CW_FAILED_BY_PEER; | |
1558 | ||
df24aa45 PR |
1559 | spin_lock_irq(&tconn->req_lock); |
1560 | rv = tconn->cstate != C_WF_REPORT_PARAMS ? SS_CW_NO_NEED : SS_UNKNOWN_ERROR; | |
1561 | ||
1562 | if (rv == SS_UNKNOWN_ERROR) | |
435693e8 | 1563 | rv = conn_is_valid_transition(tconn, mask, val, 0); |
df24aa45 | 1564 | |
bd0c824a PR |
1565 | if (rv == SS_SUCCESS) |
1566 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ | |
df24aa45 PR |
1567 | |
1568 | spin_unlock_irq(&tconn->req_lock); | |
1569 | ||
1570 | return rv; | |
1571 | } | |
1572 | ||
1573 | static enum drbd_state_rv | |
1574 | conn_cl_wide(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1575 | enum chg_state_flags f) | |
1576 | { | |
1577 | enum drbd_state_rv rv; | |
1578 | ||
1579 | spin_unlock_irq(&tconn->req_lock); | |
1580 | mutex_lock(&tconn->cstate_mutex); | |
1581 | ||
caee1c3a | 1582 | if (conn_send_state_req(tconn, mask, val)) { |
df24aa45 PR |
1583 | rv = SS_CW_FAILED_BY_PEER; |
1584 | /* if (f & CS_VERBOSE) | |
1585 | print_st_err(mdev, os, ns, rv); */ | |
1586 | goto abort; | |
1587 | } | |
1588 | ||
1589 | wait_event(tconn->ping_wait, (rv = _conn_rq_cond(tconn, mask, val))); | |
1590 | ||
1591 | abort: | |
1592 | mutex_unlock(&tconn->cstate_mutex); | |
1593 | spin_lock_irq(&tconn->req_lock); | |
1594 | ||
1595 | return rv; | |
1596 | } | |
1597 | ||
bbeb641c PR |
1598 | enum drbd_state_rv |
1599 | _conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1600 | enum chg_state_flags flags) | |
1601 | { | |
1602 | enum drbd_state_rv rv = SS_SUCCESS; | |
bbeb641c PR |
1603 | struct after_conn_state_chg_work *acscw; |
1604 | enum drbd_conns oc = tconn->cstate; | |
8c7e16c3 | 1605 | union drbd_state ns_max, ns_min, os; |
bbeb641c | 1606 | |
bbeb641c PR |
1607 | rv = is_valid_conn_transition(oc, val.conn); |
1608 | if (rv < SS_SUCCESS) | |
1609 | goto abort; | |
1610 | ||
88ef594e | 1611 | rv = conn_is_valid_transition(tconn, mask, val, flags); |
bbeb641c PR |
1612 | if (rv < SS_SUCCESS) |
1613 | goto abort; | |
1614 | ||
df24aa45 PR |
1615 | if (oc == C_WF_REPORT_PARAMS && val.conn == C_DISCONNECTING && |
1616 | !(flags & (CS_LOCAL_ONLY | CS_HARD))) { | |
1617 | rv = conn_cl_wide(tconn, mask, val, flags); | |
1618 | if (rv < SS_SUCCESS) | |
1619 | goto abort; | |
1620 | } | |
1621 | ||
435693e8 | 1622 | conn_old_common_state(tconn, &os, &flags); |
8c7e16c3 | 1623 | conn_set_state(tconn, mask, val, &ns_min, &ns_max, flags); |
5f082f98 | 1624 | conn_pr_state_change(tconn, os, ns_max, flags); |
bbeb641c PR |
1625 | |
1626 | acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC); | |
1627 | if (acscw) { | |
435693e8 | 1628 | acscw->oc = os.conn; |
8c7e16c3 | 1629 | acscw->ns_min = ns_min; |
5f082f98 | 1630 | acscw->ns_max = ns_max; |
bbeb641c PR |
1631 | acscw->flags = flags; |
1632 | acscw->w.cb = w_after_conn_state_ch; | |
1633 | acscw->w.tconn = tconn; | |
1634 | drbd_queue_work(&tconn->data.work, &acscw->w); | |
1635 | } else { | |
1636 | conn_err(tconn, "Could not kmalloc an acscw\n"); | |
b8907339 | 1637 | } |
bbeb641c PR |
1638 | |
1639 | abort: | |
bbeb641c PR |
1640 | return rv; |
1641 | } | |
1642 | ||
1643 | enum drbd_state_rv | |
1644 | conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val, | |
1645 | enum chg_state_flags flags) | |
1646 | { | |
1647 | enum drbd_state_rv rv; | |
1648 | ||
1649 | spin_lock_irq(&tconn->req_lock); | |
1650 | rv = _conn_request_state(tconn, mask, val, flags); | |
1651 | spin_unlock_irq(&tconn->req_lock); | |
1652 | ||
1653 | return rv; | |
b8907339 | 1654 | } |