Commit | Line | Data |
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93c68cc4 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b8907339 PR |
2 | /* |
3 | drbd_state.c | |
4 | ||
5 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
6 | ||
7 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
8 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
9 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
10 | ||
11 | Thanks to Carter Burden, Bart Grantham and Gennadiy Nerubayev | |
12 | from Logicworks, Inc. for making SDP replication support possible. | |
13 | ||
b8907339 PR |
14 | */ |
15 | ||
16 | #include <linux/drbd_limits.h> | |
17 | #include "drbd_int.h" | |
a3603a6e | 18 | #include "drbd_protocol.h" |
b8907339 | 19 | #include "drbd_req.h" |
a2972846 | 20 | #include "drbd_state_change.h" |
b8907339 PR |
21 | |
22 | struct after_state_chg_work { | |
23 | struct drbd_work w; | |
84b8c06b | 24 | struct drbd_device *device; |
b8907339 PR |
25 | union drbd_state os; |
26 | union drbd_state ns; | |
27 | enum chg_state_flags flags; | |
28 | struct completion *done; | |
a2972846 | 29 | struct drbd_state_change *state_change; |
b8907339 PR |
30 | }; |
31 | ||
d942ae44 PR |
32 | enum sanitize_state_warnings { |
33 | NO_WARNING, | |
34 | ABORTED_ONLINE_VERIFY, | |
35 | ABORTED_RESYNC, | |
36 | CONNECTION_LOST_NEGOTIATING, | |
37 | IMPLICITLY_UPGRADED_DISK, | |
38 | IMPLICITLY_UPGRADED_PDSK, | |
39 | }; | |
40 | ||
a2972846 AG |
41 | static void count_objects(struct drbd_resource *resource, |
42 | unsigned int *n_devices, | |
43 | unsigned int *n_connections) | |
44 | { | |
45 | struct drbd_device *device; | |
46 | struct drbd_connection *connection; | |
47 | int vnr; | |
48 | ||
49 | *n_devices = 0; | |
50 | *n_connections = 0; | |
51 | ||
52 | idr_for_each_entry(&resource->devices, device, vnr) | |
53 | (*n_devices)++; | |
2b479766 | 54 | for_each_connection(connection, resource) |
a2972846 | 55 | (*n_connections)++; |
a2972846 AG |
56 | } |
57 | ||
58 | static struct drbd_state_change *alloc_state_change(unsigned int n_devices, unsigned int n_connections, gfp_t gfp) | |
59 | { | |
60 | struct drbd_state_change *state_change; | |
61 | unsigned int size, n; | |
62 | ||
63 | size = sizeof(struct drbd_state_change) + | |
64 | n_devices * sizeof(struct drbd_device_state_change) + | |
65 | n_connections * sizeof(struct drbd_connection_state_change) + | |
66 | n_devices * n_connections * sizeof(struct drbd_peer_device_state_change); | |
67 | state_change = kmalloc(size, gfp); | |
68 | if (!state_change) | |
69 | return NULL; | |
70 | state_change->n_devices = n_devices; | |
71 | state_change->n_connections = n_connections; | |
72 | state_change->devices = (void *)(state_change + 1); | |
73 | state_change->connections = (void *)&state_change->devices[n_devices]; | |
74 | state_change->peer_devices = (void *)&state_change->connections[n_connections]; | |
75 | state_change->resource->resource = NULL; | |
76 | for (n = 0; n < n_devices; n++) | |
77 | state_change->devices[n].device = NULL; | |
78 | for (n = 0; n < n_connections; n++) | |
79 | state_change->connections[n].connection = NULL; | |
80 | return state_change; | |
81 | } | |
82 | ||
83 | struct drbd_state_change *remember_old_state(struct drbd_resource *resource, gfp_t gfp) | |
84 | { | |
85 | struct drbd_state_change *state_change; | |
86 | struct drbd_device *device; | |
87 | unsigned int n_devices; | |
88 | struct drbd_connection *connection; | |
89 | unsigned int n_connections; | |
90 | int vnr; | |
91 | ||
92 | struct drbd_device_state_change *device_state_change; | |
93 | struct drbd_peer_device_state_change *peer_device_state_change; | |
94 | struct drbd_connection_state_change *connection_state_change; | |
95 | ||
2b479766 LE |
96 | /* Caller holds req_lock spinlock. |
97 | * No state, no device IDR, no connections lists can change. */ | |
a2972846 | 98 | count_objects(resource, &n_devices, &n_connections); |
a2972846 AG |
99 | state_change = alloc_state_change(n_devices, n_connections, gfp); |
100 | if (!state_change) | |
101 | return NULL; | |
102 | ||
a2972846 AG |
103 | kref_get(&resource->kref); |
104 | state_change->resource->resource = resource; | |
105 | state_change->resource->role[OLD] = | |
106 | conn_highest_role(first_connection(resource)); | |
107 | state_change->resource->susp[OLD] = resource->susp; | |
108 | state_change->resource->susp_nod[OLD] = resource->susp_nod; | |
109 | state_change->resource->susp_fen[OLD] = resource->susp_fen; | |
110 | ||
2b479766 LE |
111 | connection_state_change = state_change->connections; |
112 | for_each_connection(connection, resource) { | |
113 | kref_get(&connection->kref); | |
114 | connection_state_change->connection = connection; | |
115 | connection_state_change->cstate[OLD] = | |
116 | connection->cstate; | |
117 | connection_state_change->peer_role[OLD] = | |
118 | conn_highest_peer(connection); | |
119 | connection_state_change++; | |
120 | } | |
121 | ||
a2972846 AG |
122 | device_state_change = state_change->devices; |
123 | peer_device_state_change = state_change->peer_devices; | |
124 | idr_for_each_entry(&resource->devices, device, vnr) { | |
125 | kref_get(&device->kref); | |
126 | device_state_change->device = device; | |
127 | device_state_change->disk_state[OLD] = device->state.disk; | |
128 | ||
129 | /* The peer_devices for each device have to be enumerated in | |
130 | the order of the connections. We may not use for_each_peer_device() here. */ | |
131 | for_each_connection(connection, resource) { | |
132 | struct drbd_peer_device *peer_device; | |
133 | ||
a2972846 AG |
134 | peer_device = conn_peer_device(connection, device->vnr); |
135 | peer_device_state_change->peer_device = peer_device; | |
136 | peer_device_state_change->disk_state[OLD] = | |
137 | device->state.pdsk; | |
138 | peer_device_state_change->repl_state[OLD] = | |
139 | max_t(enum drbd_conns, | |
140 | C_WF_REPORT_PARAMS, device->state.conn); | |
141 | peer_device_state_change->resync_susp_user[OLD] = | |
142 | device->state.user_isp; | |
143 | peer_device_state_change->resync_susp_peer[OLD] = | |
144 | device->state.peer_isp; | |
145 | peer_device_state_change->resync_susp_dependency[OLD] = | |
146 | device->state.aftr_isp; | |
147 | peer_device_state_change++; | |
148 | } | |
149 | device_state_change++; | |
150 | } | |
151 | ||
a2972846 AG |
152 | return state_change; |
153 | } | |
154 | ||
155 | static void remember_new_state(struct drbd_state_change *state_change) | |
156 | { | |
157 | struct drbd_resource_state_change *resource_state_change; | |
158 | struct drbd_resource *resource; | |
159 | unsigned int n; | |
160 | ||
161 | if (!state_change) | |
162 | return; | |
163 | ||
164 | resource_state_change = &state_change->resource[0]; | |
165 | resource = resource_state_change->resource; | |
166 | ||
167 | resource_state_change->role[NEW] = | |
168 | conn_highest_role(first_connection(resource)); | |
169 | resource_state_change->susp[NEW] = resource->susp; | |
170 | resource_state_change->susp_nod[NEW] = resource->susp_nod; | |
171 | resource_state_change->susp_fen[NEW] = resource->susp_fen; | |
172 | ||
173 | for (n = 0; n < state_change->n_devices; n++) { | |
174 | struct drbd_device_state_change *device_state_change = | |
175 | &state_change->devices[n]; | |
176 | struct drbd_device *device = device_state_change->device; | |
177 | ||
178 | device_state_change->disk_state[NEW] = device->state.disk; | |
179 | } | |
180 | ||
181 | for (n = 0; n < state_change->n_connections; n++) { | |
182 | struct drbd_connection_state_change *connection_state_change = | |
183 | &state_change->connections[n]; | |
184 | struct drbd_connection *connection = | |
185 | connection_state_change->connection; | |
186 | ||
187 | connection_state_change->cstate[NEW] = connection->cstate; | |
188 | connection_state_change->peer_role[NEW] = | |
189 | conn_highest_peer(connection); | |
190 | } | |
191 | ||
192 | for (n = 0; n < state_change->n_devices * state_change->n_connections; n++) { | |
193 | struct drbd_peer_device_state_change *peer_device_state_change = | |
194 | &state_change->peer_devices[n]; | |
195 | struct drbd_device *device = | |
196 | peer_device_state_change->peer_device->device; | |
197 | union drbd_dev_state state = device->state; | |
198 | ||
199 | peer_device_state_change->disk_state[NEW] = state.pdsk; | |
200 | peer_device_state_change->repl_state[NEW] = | |
201 | max_t(enum drbd_conns, C_WF_REPORT_PARAMS, state.conn); | |
202 | peer_device_state_change->resync_susp_user[NEW] = | |
203 | state.user_isp; | |
204 | peer_device_state_change->resync_susp_peer[NEW] = | |
205 | state.peer_isp; | |
206 | peer_device_state_change->resync_susp_dependency[NEW] = | |
207 | state.aftr_isp; | |
208 | } | |
209 | } | |
210 | ||
211 | void copy_old_to_new_state_change(struct drbd_state_change *state_change) | |
212 | { | |
213 | struct drbd_resource_state_change *resource_state_change = &state_change->resource[0]; | |
214 | unsigned int n_device, n_connection, n_peer_device, n_peer_devices; | |
215 | ||
216 | #define OLD_TO_NEW(x) \ | |
217 | (x[NEW] = x[OLD]) | |
218 | ||
219 | OLD_TO_NEW(resource_state_change->role); | |
220 | OLD_TO_NEW(resource_state_change->susp); | |
221 | OLD_TO_NEW(resource_state_change->susp_nod); | |
222 | OLD_TO_NEW(resource_state_change->susp_fen); | |
223 | ||
224 | for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) { | |
225 | struct drbd_connection_state_change *connection_state_change = | |
226 | &state_change->connections[n_connection]; | |
227 | ||
228 | OLD_TO_NEW(connection_state_change->peer_role); | |
229 | OLD_TO_NEW(connection_state_change->cstate); | |
230 | } | |
231 | ||
232 | for (n_device = 0; n_device < state_change->n_devices; n_device++) { | |
233 | struct drbd_device_state_change *device_state_change = | |
234 | &state_change->devices[n_device]; | |
235 | ||
236 | OLD_TO_NEW(device_state_change->disk_state); | |
237 | } | |
238 | ||
239 | n_peer_devices = state_change->n_devices * state_change->n_connections; | |
240 | for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) { | |
241 | struct drbd_peer_device_state_change *p = | |
242 | &state_change->peer_devices[n_peer_device]; | |
243 | ||
244 | OLD_TO_NEW(p->disk_state); | |
245 | OLD_TO_NEW(p->repl_state); | |
246 | OLD_TO_NEW(p->resync_susp_user); | |
247 | OLD_TO_NEW(p->resync_susp_peer); | |
248 | OLD_TO_NEW(p->resync_susp_dependency); | |
249 | } | |
250 | ||
251 | #undef OLD_TO_NEW | |
252 | } | |
253 | ||
254 | void forget_state_change(struct drbd_state_change *state_change) | |
255 | { | |
256 | unsigned int n; | |
257 | ||
258 | if (!state_change) | |
259 | return; | |
260 | ||
261 | if (state_change->resource->resource) | |
262 | kref_put(&state_change->resource->resource->kref, drbd_destroy_resource); | |
263 | for (n = 0; n < state_change->n_devices; n++) { | |
264 | struct drbd_device *device = state_change->devices[n].device; | |
265 | ||
266 | if (device) | |
267 | kref_put(&device->kref, drbd_destroy_device); | |
268 | } | |
269 | for (n = 0; n < state_change->n_connections; n++) { | |
270 | struct drbd_connection *connection = | |
271 | state_change->connections[n].connection; | |
272 | ||
273 | if (connection) | |
274 | kref_put(&connection->kref, drbd_destroy_connection); | |
275 | } | |
276 | kfree(state_change); | |
277 | } | |
278 | ||
99920dc5 | 279 | static int w_after_state_ch(struct drbd_work *w, int unused); |
b30ab791 | 280 | static void after_state_ch(struct drbd_device *device, union drbd_state os, |
a2972846 AG |
281 | union drbd_state ns, enum chg_state_flags flags, |
282 | struct drbd_state_change *); | |
54761697 | 283 | static enum drbd_state_rv is_valid_state(struct drbd_device *, union drbd_state); |
bde89a9e | 284 | static enum drbd_state_rv is_valid_soft_transition(union drbd_state, union drbd_state, struct drbd_connection *); |
3509502d | 285 | static enum drbd_state_rv is_valid_transition(union drbd_state os, union drbd_state ns); |
d7fe69c6 PR |
286 | static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os, |
287 | union drbd_state ns, enum sanitize_state_warnings *warn); | |
b8907339 | 288 | |
2aebfabb PR |
289 | static inline bool is_susp(union drbd_state s) |
290 | { | |
291 | return s.susp || s.susp_nod || s.susp_fen; | |
292 | } | |
293 | ||
bde89a9e | 294 | bool conn_all_vols_unconf(struct drbd_connection *connection) |
0e29d163 | 295 | { |
c06ece6b | 296 | struct drbd_peer_device *peer_device; |
695d08fa | 297 | bool rv = true; |
e90285e0 | 298 | int vnr; |
0e29d163 | 299 | |
695d08fa | 300 | rcu_read_lock(); |
c06ece6b AG |
301 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
302 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
303 | if (device->state.disk != D_DISKLESS || |
304 | device->state.conn != C_STANDALONE || | |
305 | device->state.role != R_SECONDARY) { | |
695d08fa PR |
306 | rv = false; |
307 | break; | |
308 | } | |
0e29d163 | 309 | } |
695d08fa PR |
310 | rcu_read_unlock(); |
311 | ||
312 | return rv; | |
0e29d163 PR |
313 | } |
314 | ||
cb703454 PR |
315 | /* Unfortunately the states where not correctly ordered, when |
316 | they where defined. therefore can not use max_t() here. */ | |
317 | static enum drbd_role max_role(enum drbd_role role1, enum drbd_role role2) | |
318 | { | |
319 | if (role1 == R_PRIMARY || role2 == R_PRIMARY) | |
320 | return R_PRIMARY; | |
321 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
322 | return R_SECONDARY; | |
323 | return R_UNKNOWN; | |
324 | } | |
a2972846 | 325 | |
cb703454 PR |
326 | static enum drbd_role min_role(enum drbd_role role1, enum drbd_role role2) |
327 | { | |
328 | if (role1 == R_UNKNOWN || role2 == R_UNKNOWN) | |
329 | return R_UNKNOWN; | |
330 | if (role1 == R_SECONDARY || role2 == R_SECONDARY) | |
331 | return R_SECONDARY; | |
332 | return R_PRIMARY; | |
333 | } | |
334 | ||
bde89a9e | 335 | enum drbd_role conn_highest_role(struct drbd_connection *connection) |
cb703454 | 336 | { |
c200d986 | 337 | enum drbd_role role = R_SECONDARY; |
c06ece6b | 338 | struct drbd_peer_device *peer_device; |
cb703454 PR |
339 | int vnr; |
340 | ||
695d08fa | 341 | rcu_read_lock(); |
c06ece6b AG |
342 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
343 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 344 | role = max_role(role, device->state.role); |
c06ece6b | 345 | } |
695d08fa | 346 | rcu_read_unlock(); |
cb703454 PR |
347 | |
348 | return role; | |
349 | } | |
350 | ||
bde89a9e | 351 | enum drbd_role conn_highest_peer(struct drbd_connection *connection) |
cb703454 PR |
352 | { |
353 | enum drbd_role peer = R_UNKNOWN; | |
c06ece6b | 354 | struct drbd_peer_device *peer_device; |
cb703454 PR |
355 | int vnr; |
356 | ||
695d08fa | 357 | rcu_read_lock(); |
c06ece6b AG |
358 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
359 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 360 | peer = max_role(peer, device->state.peer); |
c06ece6b | 361 | } |
695d08fa | 362 | rcu_read_unlock(); |
cb703454 PR |
363 | |
364 | return peer; | |
365 | } | |
366 | ||
bde89a9e | 367 | enum drbd_disk_state conn_highest_disk(struct drbd_connection *connection) |
cb703454 | 368 | { |
11f8b2b6 | 369 | enum drbd_disk_state disk_state = D_DISKLESS; |
c06ece6b | 370 | struct drbd_peer_device *peer_device; |
cb703454 PR |
371 | int vnr; |
372 | ||
695d08fa | 373 | rcu_read_lock(); |
c06ece6b AG |
374 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
375 | struct drbd_device *device = peer_device->device; | |
11f8b2b6 | 376 | disk_state = max_t(enum drbd_disk_state, disk_state, device->state.disk); |
c06ece6b | 377 | } |
695d08fa | 378 | rcu_read_unlock(); |
cb703454 | 379 | |
11f8b2b6 | 380 | return disk_state; |
cb703454 PR |
381 | } |
382 | ||
bde89a9e | 383 | enum drbd_disk_state conn_lowest_disk(struct drbd_connection *connection) |
4669265a | 384 | { |
11f8b2b6 | 385 | enum drbd_disk_state disk_state = D_MASK; |
c06ece6b | 386 | struct drbd_peer_device *peer_device; |
4669265a PR |
387 | int vnr; |
388 | ||
695d08fa | 389 | rcu_read_lock(); |
c06ece6b AG |
390 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
391 | struct drbd_device *device = peer_device->device; | |
11f8b2b6 | 392 | disk_state = min_t(enum drbd_disk_state, disk_state, device->state.disk); |
c06ece6b | 393 | } |
695d08fa | 394 | rcu_read_unlock(); |
4669265a | 395 | |
11f8b2b6 | 396 | return disk_state; |
4669265a PR |
397 | } |
398 | ||
bde89a9e | 399 | enum drbd_disk_state conn_highest_pdsk(struct drbd_connection *connection) |
cb703454 | 400 | { |
11f8b2b6 | 401 | enum drbd_disk_state disk_state = D_DISKLESS; |
c06ece6b | 402 | struct drbd_peer_device *peer_device; |
cb703454 PR |
403 | int vnr; |
404 | ||
695d08fa | 405 | rcu_read_lock(); |
c06ece6b AG |
406 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
407 | struct drbd_device *device = peer_device->device; | |
11f8b2b6 | 408 | disk_state = max_t(enum drbd_disk_state, disk_state, device->state.pdsk); |
c06ece6b | 409 | } |
695d08fa | 410 | rcu_read_unlock(); |
cb703454 | 411 | |
11f8b2b6 | 412 | return disk_state; |
cb703454 PR |
413 | } |
414 | ||
bde89a9e | 415 | enum drbd_conns conn_lowest_conn(struct drbd_connection *connection) |
19f83c76 PR |
416 | { |
417 | enum drbd_conns conn = C_MASK; | |
c06ece6b | 418 | struct drbd_peer_device *peer_device; |
19f83c76 PR |
419 | int vnr; |
420 | ||
695d08fa | 421 | rcu_read_lock(); |
c06ece6b AG |
422 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
423 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 424 | conn = min_t(enum drbd_conns, conn, device->state.conn); |
c06ece6b | 425 | } |
695d08fa | 426 | rcu_read_unlock(); |
19f83c76 PR |
427 | |
428 | return conn; | |
429 | } | |
430 | ||
bde89a9e | 431 | static bool no_peer_wf_report_params(struct drbd_connection *connection) |
79702011 | 432 | { |
c06ece6b | 433 | struct drbd_peer_device *peer_device; |
79702011 PR |
434 | int vnr; |
435 | bool rv = true; | |
436 | ||
437 | rcu_read_lock(); | |
c06ece6b AG |
438 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) |
439 | if (peer_device->device->state.conn == C_WF_REPORT_PARAMS) { | |
79702011 PR |
440 | rv = false; |
441 | break; | |
442 | } | |
443 | rcu_read_unlock(); | |
444 | ||
445 | return rv; | |
446 | } | |
447 | ||
a8821531 PR |
448 | static void wake_up_all_devices(struct drbd_connection *connection) |
449 | { | |
450 | struct drbd_peer_device *peer_device; | |
451 | int vnr; | |
452 | ||
453 | rcu_read_lock(); | |
454 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) | |
455 | wake_up(&peer_device->device->state_wait); | |
456 | rcu_read_unlock(); | |
457 | ||
458 | } | |
459 | ||
79702011 | 460 | |
b8907339 PR |
461 | /** |
462 | * cl_wide_st_chg() - true if the state change is a cluster wide one | |
b30ab791 | 463 | * @device: DRBD device. |
b8907339 PR |
464 | * @os: old (current) state. |
465 | * @ns: new (wanted) state. | |
466 | */ | |
b30ab791 | 467 | static int cl_wide_st_chg(struct drbd_device *device, |
b8907339 PR |
468 | union drbd_state os, union drbd_state ns) |
469 | { | |
470 | return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED && | |
471 | ((os.role != R_PRIMARY && ns.role == R_PRIMARY) || | |
472 | (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
473 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) || | |
e8744f5a | 474 | (os.disk != D_FAILED && ns.disk == D_FAILED))) || |
b8907339 | 475 | (os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) || |
369bea63 PR |
476 | (os.conn == C_CONNECTED && ns.conn == C_VERIFY_S) || |
477 | (os.conn == C_CONNECTED && ns.conn == C_WF_REPORT_PARAMS); | |
b8907339 PR |
478 | } |
479 | ||
56707f9e PR |
480 | static union drbd_state |
481 | apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val) | |
482 | { | |
483 | union drbd_state ns; | |
484 | ns.i = (os.i & ~mask.i) | val.i; | |
485 | return ns; | |
486 | } | |
487 | ||
b8907339 | 488 | enum drbd_state_rv |
b30ab791 | 489 | drbd_change_state(struct drbd_device *device, enum chg_state_flags f, |
b8907339 PR |
490 | union drbd_state mask, union drbd_state val) |
491 | { | |
492 | unsigned long flags; | |
56707f9e | 493 | union drbd_state ns; |
b8907339 PR |
494 | enum drbd_state_rv rv; |
495 | ||
0500813f | 496 | spin_lock_irqsave(&device->resource->req_lock, flags); |
b30ab791 AG |
497 | ns = apply_mask_val(drbd_read_state(device), mask, val); |
498 | rv = _drbd_set_state(device, ns, f, NULL); | |
0500813f | 499 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
b8907339 PR |
500 | |
501 | return rv; | |
502 | } | |
503 | ||
504 | /** | |
505 | * drbd_force_state() - Impose a change which happens outside our control on our state | |
b30ab791 | 506 | * @device: DRBD device. |
b8907339 PR |
507 | * @mask: mask of state bits to change. |
508 | * @val: value of new state bits. | |
509 | */ | |
b30ab791 | 510 | void drbd_force_state(struct drbd_device *device, |
b8907339 PR |
511 | union drbd_state mask, union drbd_state val) |
512 | { | |
b30ab791 | 513 | drbd_change_state(device, CS_HARD, mask, val); |
b8907339 PR |
514 | } |
515 | ||
516 | static enum drbd_state_rv | |
b30ab791 | 517 | _req_st_cond(struct drbd_device *device, union drbd_state mask, |
b8907339 PR |
518 | union drbd_state val) |
519 | { | |
520 | union drbd_state os, ns; | |
521 | unsigned long flags; | |
522 | enum drbd_state_rv rv; | |
523 | ||
b30ab791 | 524 | if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &device->flags)) |
b8907339 PR |
525 | return SS_CW_SUCCESS; |
526 | ||
b30ab791 | 527 | if (test_and_clear_bit(CL_ST_CHG_FAIL, &device->flags)) |
b8907339 PR |
528 | return SS_CW_FAILED_BY_PEER; |
529 | ||
0500813f | 530 | spin_lock_irqsave(&device->resource->req_lock, flags); |
b30ab791 | 531 | os = drbd_read_state(device); |
d7fe69c6 | 532 | ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL); |
3509502d | 533 | rv = is_valid_transition(os, ns); |
a3025a27 | 534 | if (rv >= SS_SUCCESS) |
3509502d | 535 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ |
b8907339 | 536 | |
b30ab791 | 537 | if (!cl_wide_st_chg(device, os, ns)) |
b8907339 | 538 | rv = SS_CW_NO_NEED; |
3509502d | 539 | if (rv == SS_UNKNOWN_ERROR) { |
b30ab791 | 540 | rv = is_valid_state(device, ns); |
a3025a27 | 541 | if (rv >= SS_SUCCESS) { |
a6b32bc3 | 542 | rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection); |
a3025a27 | 543 | if (rv >= SS_SUCCESS) |
b8907339 PR |
544 | rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ |
545 | } | |
546 | } | |
0500813f | 547 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
b8907339 PR |
548 | |
549 | return rv; | |
550 | } | |
551 | ||
552 | /** | |
553 | * drbd_req_state() - Perform an eventually cluster wide state change | |
b30ab791 | 554 | * @device: DRBD device. |
b8907339 PR |
555 | * @mask: mask of state bits to change. |
556 | * @val: value of new state bits. | |
557 | * @f: flags | |
558 | * | |
559 | * Should not be called directly, use drbd_request_state() or | |
560 | * _drbd_request_state(). | |
561 | */ | |
562 | static enum drbd_state_rv | |
b30ab791 | 563 | drbd_req_state(struct drbd_device *device, union drbd_state mask, |
b8907339 PR |
564 | union drbd_state val, enum chg_state_flags f) |
565 | { | |
566 | struct completion done; | |
567 | unsigned long flags; | |
568 | union drbd_state os, ns; | |
569 | enum drbd_state_rv rv; | |
33d32fa7 | 570 | void *buffer = NULL; |
b8907339 PR |
571 | |
572 | init_completion(&done); | |
573 | ||
574 | if (f & CS_SERIALIZE) | |
b30ab791 | 575 | mutex_lock(device->state_mutex); |
33d32fa7 LE |
576 | if (f & CS_INHIBIT_MD_IO) |
577 | buffer = drbd_md_get_buffer(device, __func__); | |
b8907339 | 578 | |
0500813f | 579 | spin_lock_irqsave(&device->resource->req_lock, flags); |
b30ab791 | 580 | os = drbd_read_state(device); |
d7fe69c6 | 581 | ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL); |
3509502d | 582 | rv = is_valid_transition(os, ns); |
3c5e5f6a | 583 | if (rv < SS_SUCCESS) { |
0500813f | 584 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
3509502d | 585 | goto abort; |
3c5e5f6a | 586 | } |
b8907339 | 587 | |
b30ab791 AG |
588 | if (cl_wide_st_chg(device, os, ns)) { |
589 | rv = is_valid_state(device, ns); | |
b8907339 | 590 | if (rv == SS_SUCCESS) |
a6b32bc3 | 591 | rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection); |
0500813f | 592 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
b8907339 PR |
593 | |
594 | if (rv < SS_SUCCESS) { | |
595 | if (f & CS_VERBOSE) | |
b30ab791 | 596 | print_st_err(device, os, ns, rv); |
b8907339 PR |
597 | goto abort; |
598 | } | |
599 | ||
69a22773 | 600 | if (drbd_send_state_req(first_peer_device(device), mask, val)) { |
b8907339 PR |
601 | rv = SS_CW_FAILED_BY_PEER; |
602 | if (f & CS_VERBOSE) | |
b30ab791 | 603 | print_st_err(device, os, ns, rv); |
b8907339 PR |
604 | goto abort; |
605 | } | |
606 | ||
b30ab791 AG |
607 | wait_event(device->state_wait, |
608 | (rv = _req_st_cond(device, mask, val))); | |
b8907339 PR |
609 | |
610 | if (rv < SS_SUCCESS) { | |
b8907339 | 611 | if (f & CS_VERBOSE) |
b30ab791 | 612 | print_st_err(device, os, ns, rv); |
b8907339 PR |
613 | goto abort; |
614 | } | |
0500813f | 615 | spin_lock_irqsave(&device->resource->req_lock, flags); |
b30ab791 AG |
616 | ns = apply_mask_val(drbd_read_state(device), mask, val); |
617 | rv = _drbd_set_state(device, ns, f, &done); | |
b8907339 | 618 | } else { |
b30ab791 | 619 | rv = _drbd_set_state(device, ns, f, &done); |
b8907339 PR |
620 | } |
621 | ||
0500813f | 622 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
b8907339 PR |
623 | |
624 | if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) { | |
0b0ba1ef | 625 | D_ASSERT(device, current != first_peer_device(device)->connection->worker.task); |
b8907339 PR |
626 | wait_for_completion(&done); |
627 | } | |
628 | ||
629 | abort: | |
33d32fa7 LE |
630 | if (buffer) |
631 | drbd_md_put_buffer(device); | |
b8907339 | 632 | if (f & CS_SERIALIZE) |
b30ab791 | 633 | mutex_unlock(device->state_mutex); |
b8907339 PR |
634 | |
635 | return rv; | |
636 | } | |
637 | ||
638 | /** | |
639 | * _drbd_request_state() - Request a state change (with flags) | |
b30ab791 | 640 | * @device: DRBD device. |
b8907339 PR |
641 | * @mask: mask of state bits to change. |
642 | * @val: value of new state bits. | |
643 | * @f: flags | |
644 | * | |
645 | * Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE | |
646 | * flag, or when logging of failed state change requests is not desired. | |
647 | */ | |
648 | enum drbd_state_rv | |
b30ab791 | 649 | _drbd_request_state(struct drbd_device *device, union drbd_state mask, |
b8907339 PR |
650 | union drbd_state val, enum chg_state_flags f) |
651 | { | |
652 | enum drbd_state_rv rv; | |
653 | ||
b30ab791 AG |
654 | wait_event(device->state_wait, |
655 | (rv = drbd_req_state(device, mask, val, f)) != SS_IN_TRANSIENT_STATE); | |
b8907339 PR |
656 | |
657 | return rv; | |
658 | } | |
659 | ||
33d32fa7 LE |
660 | /* |
661 | * We grab drbd_md_get_buffer(), because we don't want to "fail" the disk while | |
662 | * there is IO in-flight: the transition into D_FAILED for detach purposes | |
663 | * may get misinterpreted as actual IO error in a confused endio function. | |
664 | * | |
665 | * We wrap it all into wait_event(), to retry in case the drbd_req_state() | |
666 | * returns SS_IN_TRANSIENT_STATE. | |
667 | * | |
668 | * To avoid potential deadlock with e.g. the receiver thread trying to grab | |
669 | * drbd_md_get_buffer() while trying to get out of the "transient state", we | |
670 | * need to grab and release the meta data buffer inside of that wait_event loop. | |
671 | */ | |
672 | static enum drbd_state_rv | |
673 | request_detach(struct drbd_device *device) | |
674 | { | |
675 | return drbd_req_state(device, NS(disk, D_FAILED), | |
676 | CS_VERBOSE | CS_ORDERED | CS_INHIBIT_MD_IO); | |
677 | } | |
678 | ||
5816a093 | 679 | int drbd_request_detach_interruptible(struct drbd_device *device) |
33d32fa7 | 680 | { |
5816a093 | 681 | int ret, rv; |
33d32fa7 LE |
682 | |
683 | drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */ | |
684 | wait_event_interruptible(device->state_wait, | |
685 | (rv = request_detach(device)) != SS_IN_TRANSIENT_STATE); | |
686 | drbd_resume_io(device); | |
687 | ||
688 | ret = wait_event_interruptible(device->misc_wait, | |
689 | device->state.disk != D_FAILED); | |
690 | ||
691 | if (rv == SS_IS_DISKLESS) | |
692 | rv = SS_NOTHING_TO_DO; | |
693 | if (ret) | |
694 | rv = ERR_INTR; | |
695 | ||
696 | return rv; | |
697 | } | |
698 | ||
a8821531 PR |
699 | enum drbd_state_rv |
700 | _drbd_request_state_holding_state_mutex(struct drbd_device *device, union drbd_state mask, | |
701 | union drbd_state val, enum chg_state_flags f) | |
702 | { | |
703 | enum drbd_state_rv rv; | |
704 | ||
705 | BUG_ON(f & CS_SERIALIZE); | |
706 | ||
707 | wait_event_cmd(device->state_wait, | |
708 | (rv = drbd_req_state(device, mask, val, f)) != SS_IN_TRANSIENT_STATE, | |
709 | mutex_unlock(device->state_mutex), | |
710 | mutex_lock(device->state_mutex)); | |
711 | ||
712 | return rv; | |
713 | } | |
714 | ||
8ce953aa | 715 | static void print_st(struct drbd_device *device, const char *name, union drbd_state ns) |
b8907339 | 716 | { |
d0180171 | 717 | drbd_err(device, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n", |
b8907339 PR |
718 | name, |
719 | drbd_conn_str(ns.conn), | |
720 | drbd_role_str(ns.role), | |
721 | drbd_role_str(ns.peer), | |
722 | drbd_disk_str(ns.disk), | |
723 | drbd_disk_str(ns.pdsk), | |
724 | is_susp(ns) ? 's' : 'r', | |
725 | ns.aftr_isp ? 'a' : '-', | |
726 | ns.peer_isp ? 'p' : '-', | |
727 | ns.user_isp ? 'u' : '-', | |
728 | ns.susp_fen ? 'F' : '-', | |
729 | ns.susp_nod ? 'N' : '-' | |
730 | ); | |
731 | } | |
732 | ||
b30ab791 | 733 | void print_st_err(struct drbd_device *device, union drbd_state os, |
b8907339 PR |
734 | union drbd_state ns, enum drbd_state_rv err) |
735 | { | |
736 | if (err == SS_IN_TRANSIENT_STATE) | |
737 | return; | |
d0180171 | 738 | drbd_err(device, "State change failed: %s\n", drbd_set_st_err_str(err)); |
b30ab791 AG |
739 | print_st(device, " state", os); |
740 | print_st(device, "wanted", ns); | |
b8907339 PR |
741 | } |
742 | ||
435693e8 | 743 | static long print_state_change(char *pb, union drbd_state os, union drbd_state ns, |
bbeb641c PR |
744 | enum chg_state_flags flags) |
745 | { | |
435693e8 | 746 | char *pbp; |
bbeb641c PR |
747 | pbp = pb; |
748 | *pbp = 0; | |
706cb24c | 749 | |
435693e8 | 750 | if (ns.role != os.role && flags & CS_DC_ROLE) |
bbeb641c PR |
751 | pbp += sprintf(pbp, "role( %s -> %s ) ", |
752 | drbd_role_str(os.role), | |
753 | drbd_role_str(ns.role)); | |
435693e8 | 754 | if (ns.peer != os.peer && flags & CS_DC_PEER) |
bbeb641c PR |
755 | pbp += sprintf(pbp, "peer( %s -> %s ) ", |
756 | drbd_role_str(os.peer), | |
757 | drbd_role_str(ns.peer)); | |
435693e8 | 758 | if (ns.conn != os.conn && flags & CS_DC_CONN) |
bbeb641c PR |
759 | pbp += sprintf(pbp, "conn( %s -> %s ) ", |
760 | drbd_conn_str(os.conn), | |
761 | drbd_conn_str(ns.conn)); | |
435693e8 | 762 | if (ns.disk != os.disk && flags & CS_DC_DISK) |
bbeb641c PR |
763 | pbp += sprintf(pbp, "disk( %s -> %s ) ", |
764 | drbd_disk_str(os.disk), | |
765 | drbd_disk_str(ns.disk)); | |
435693e8 | 766 | if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK) |
bbeb641c PR |
767 | pbp += sprintf(pbp, "pdsk( %s -> %s ) ", |
768 | drbd_disk_str(os.pdsk), | |
769 | drbd_disk_str(ns.pdsk)); | |
706cb24c PR |
770 | |
771 | return pbp - pb; | |
772 | } | |
773 | ||
b30ab791 | 774 | static void drbd_pr_state_change(struct drbd_device *device, union drbd_state os, union drbd_state ns, |
706cb24c PR |
775 | enum chg_state_flags flags) |
776 | { | |
777 | char pb[300]; | |
778 | char *pbp = pb; | |
779 | ||
780 | pbp += print_state_change(pbp, os, ns, flags ^ CS_DC_MASK); | |
781 | ||
bbeb641c PR |
782 | if (ns.aftr_isp != os.aftr_isp) |
783 | pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ", | |
784 | os.aftr_isp, | |
785 | ns.aftr_isp); | |
786 | if (ns.peer_isp != os.peer_isp) | |
787 | pbp += sprintf(pbp, "peer_isp( %d -> %d ) ", | |
788 | os.peer_isp, | |
789 | ns.peer_isp); | |
790 | if (ns.user_isp != os.user_isp) | |
791 | pbp += sprintf(pbp, "user_isp( %d -> %d ) ", | |
792 | os.user_isp, | |
793 | ns.user_isp); | |
435693e8 | 794 | |
706cb24c | 795 | if (pbp != pb) |
d0180171 | 796 | drbd_info(device, "%s\n", pb); |
bbeb641c | 797 | } |
b8907339 | 798 | |
bde89a9e | 799 | static void conn_pr_state_change(struct drbd_connection *connection, union drbd_state os, union drbd_state ns, |
435693e8 PR |
800 | enum chg_state_flags flags) |
801 | { | |
802 | char pb[300]; | |
706cb24c PR |
803 | char *pbp = pb; |
804 | ||
805 | pbp += print_state_change(pbp, os, ns, flags); | |
435693e8 | 806 | |
706cb24c PR |
807 | if (is_susp(ns) != is_susp(os) && flags & CS_DC_SUSP) |
808 | pbp += sprintf(pbp, "susp( %d -> %d ) ", | |
809 | is_susp(os), | |
810 | is_susp(ns)); | |
811 | ||
812 | if (pbp != pb) | |
1ec861eb | 813 | drbd_info(connection, "%s\n", pb); |
435693e8 PR |
814 | } |
815 | ||
816 | ||
b8907339 PR |
817 | /** |
818 | * is_valid_state() - Returns an SS_ error code if ns is not valid | |
b30ab791 | 819 | * @device: DRBD device. |
b8907339 PR |
820 | * @ns: State to consider. |
821 | */ | |
822 | static enum drbd_state_rv | |
b30ab791 | 823 | is_valid_state(struct drbd_device *device, union drbd_state ns) |
b8907339 PR |
824 | { |
825 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
826 | ||
827 | enum drbd_fencing_p fp; | |
828 | enum drbd_state_rv rv = SS_SUCCESS; | |
44ed167d | 829 | struct net_conf *nc; |
b8907339 | 830 | |
daeda1cc | 831 | rcu_read_lock(); |
b8907339 | 832 | fp = FP_DONT_CARE; |
b30ab791 AG |
833 | if (get_ldev(device)) { |
834 | fp = rcu_dereference(device->ldev->disk_conf)->fencing; | |
835 | put_ldev(device); | |
b8907339 PR |
836 | } |
837 | ||
a6b32bc3 | 838 | nc = rcu_dereference(first_peer_device(device)->connection->net_conf); |
44ed167d PR |
839 | if (nc) { |
840 | if (!nc->two_primaries && ns.role == R_PRIMARY) { | |
047e95e2 PR |
841 | if (ns.peer == R_PRIMARY) |
842 | rv = SS_TWO_PRIMARIES; | |
a6b32bc3 | 843 | else if (conn_highest_peer(first_peer_device(device)->connection) == R_PRIMARY) |
047e95e2 | 844 | rv = SS_O_VOL_PEER_PRI; |
44ed167d | 845 | } |
b8907339 PR |
846 | } |
847 | ||
848 | if (rv <= 0) | |
4e526a00 | 849 | goto out; /* already found a reason to abort */ |
b30ab791 | 850 | else if (ns.role == R_SECONDARY && device->open_cnt) |
b8907339 PR |
851 | rv = SS_DEVICE_IN_USE; |
852 | ||
853 | else if (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.disk < D_UP_TO_DATE) | |
854 | rv = SS_NO_UP_TO_DATE_DISK; | |
855 | ||
856 | else if (fp >= FP_RESOURCE && | |
857 | ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk >= D_UNKNOWN) | |
858 | rv = SS_PRIMARY_NOP; | |
859 | ||
860 | else if (ns.role == R_PRIMARY && ns.disk <= D_INCONSISTENT && ns.pdsk <= D_INCONSISTENT) | |
861 | rv = SS_NO_UP_TO_DATE_DISK; | |
862 | ||
863 | else if (ns.conn > C_CONNECTED && ns.disk < D_INCONSISTENT) | |
864 | rv = SS_NO_LOCAL_DISK; | |
865 | ||
866 | else if (ns.conn > C_CONNECTED && ns.pdsk < D_INCONSISTENT) | |
867 | rv = SS_NO_REMOTE_DISK; | |
868 | ||
869 | else if (ns.conn > C_CONNECTED && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) | |
870 | rv = SS_NO_UP_TO_DATE_DISK; | |
871 | ||
872 | else if ((ns.conn == C_CONNECTED || | |
873 | ns.conn == C_WF_BITMAP_S || | |
874 | ns.conn == C_SYNC_SOURCE || | |
875 | ns.conn == C_PAUSED_SYNC_S) && | |
876 | ns.disk == D_OUTDATED) | |
877 | rv = SS_CONNECTED_OUTDATES; | |
878 | ||
a5e61b50 | 879 | else if (nc && (ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && |
44ed167d | 880 | (nc->verify_alg[0] == 0)) |
b8907339 PR |
881 | rv = SS_NO_VERIFY_ALG; |
882 | ||
883 | else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
a6b32bc3 | 884 | first_peer_device(device)->connection->agreed_pro_version < 88) |
b8907339 PR |
885 | rv = SS_NOT_SUPPORTED; |
886 | ||
5c4f13d9 PR |
887 | else if (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) |
888 | rv = SS_NO_UP_TO_DATE_DISK; | |
889 | ||
890 | else if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) && | |
891 | ns.pdsk == D_UNKNOWN) | |
892 | rv = SS_NEED_CONNECTION; | |
893 | ||
b8907339 PR |
894 | else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN) |
895 | rv = SS_CONNECTED_OUTDATES; | |
896 | ||
4e526a00 | 897 | out: |
44ed167d PR |
898 | rcu_read_unlock(); |
899 | ||
b8907339 PR |
900 | return rv; |
901 | } | |
902 | ||
903 | /** | |
a75f34ad | 904 | * is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible |
3509502d PR |
905 | * This function limits state transitions that may be declined by DRBD. I.e. |
906 | * user requests (aka soft transitions). | |
b8907339 | 907 | * @os: old state. |
49ece311 LJ |
908 | * @ns: new state. |
909 | * @connection: DRBD connection. | |
b8907339 PR |
910 | */ |
911 | static enum drbd_state_rv | |
bde89a9e | 912 | is_valid_soft_transition(union drbd_state os, union drbd_state ns, struct drbd_connection *connection) |
b8907339 PR |
913 | { |
914 | enum drbd_state_rv rv = SS_SUCCESS; | |
915 | ||
916 | if ((ns.conn == C_STARTING_SYNC_T || ns.conn == C_STARTING_SYNC_S) && | |
917 | os.conn > C_CONNECTED) | |
918 | rv = SS_RESYNC_RUNNING; | |
919 | ||
920 | if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE) | |
921 | rv = SS_ALREADY_STANDALONE; | |
922 | ||
923 | if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS) | |
924 | rv = SS_IS_DISKLESS; | |
925 | ||
926 | if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED) | |
927 | rv = SS_NO_NET_CONFIG; | |
928 | ||
929 | if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING) | |
930 | rv = SS_LOWER_THAN_OUTDATED; | |
931 | ||
932 | if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED) | |
933 | rv = SS_IN_TRANSIENT_STATE; | |
934 | ||
a1096a6e | 935 | /* While establishing a connection only allow cstate to change. |
a8821531 | 936 | Delay/refuse role changes, detach attach etc... (they do not touch cstate) */ |
bde89a9e | 937 | if (test_bit(STATE_SENT, &connection->flags) && |
a8821531 PR |
938 | !((ns.conn == C_WF_REPORT_PARAMS && os.conn == C_WF_CONNECTION) || |
939 | (ns.conn >= C_CONNECTED && os.conn == C_WF_REPORT_PARAMS))) | |
a1096a6e PR |
940 | rv = SS_IN_TRANSIENT_STATE; |
941 | ||
31d64604 LE |
942 | /* Do not promote during resync handshake triggered by "force primary". |
943 | * This is a hack. It should really be rejected by the peer during the | |
944 | * cluster wide state change request. */ | |
945 | if (os.role != R_PRIMARY && ns.role == R_PRIMARY | |
946 | && ns.pdsk == D_UP_TO_DATE | |
947 | && ns.disk != D_UP_TO_DATE && ns.disk != D_DISKLESS | |
948 | && (ns.conn <= C_WF_SYNC_UUID || ns.conn != os.conn)) | |
949 | rv = SS_IN_TRANSIENT_STATE; | |
950 | ||
b8907339 PR |
951 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED) |
952 | rv = SS_NEED_CONNECTION; | |
953 | ||
954 | if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && | |
955 | ns.conn != os.conn && os.conn > C_CONNECTED) | |
956 | rv = SS_RESYNC_RUNNING; | |
957 | ||
958 | if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) && | |
959 | os.conn < C_CONNECTED) | |
960 | rv = SS_NEED_CONNECTION; | |
961 | ||
962 | if ((ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE) | |
963 | && os.conn < C_WF_REPORT_PARAMS) | |
964 | rv = SS_NEED_CONNECTION; /* No NetworkFailure -> SyncTarget etc... */ | |
965 | ||
2bd5ed5d PR |
966 | if (ns.conn == C_DISCONNECTING && ns.pdsk == D_OUTDATED && |
967 | os.conn < C_CONNECTED && os.pdsk > D_OUTDATED) | |
968 | rv = SS_OUTDATE_WO_CONN; | |
969 | ||
b8907339 PR |
970 | return rv; |
971 | } | |
972 | ||
3509502d | 973 | static enum drbd_state_rv |
fda74117 | 974 | is_valid_conn_transition(enum drbd_conns oc, enum drbd_conns nc) |
3509502d | 975 | { |
d9cc6e23 LE |
976 | /* no change -> nothing to do, at least for the connection part */ |
977 | if (oc == nc) | |
978 | return SS_NOTHING_TO_DO; | |
3509502d | 979 | |
d9cc6e23 LE |
980 | /* disconnect of an unconfigured connection does not make sense */ |
981 | if (oc == C_STANDALONE && nc == C_DISCONNECTING) | |
982 | return SS_ALREADY_STANDALONE; | |
983 | ||
984 | /* from C_STANDALONE, we start with C_UNCONNECTED */ | |
985 | if (oc == C_STANDALONE && nc != C_UNCONNECTED) | |
986 | return SS_NEED_CONNECTION; | |
3509502d | 987 | |
25b0d6c8 PR |
988 | /* When establishing a connection we need to go through WF_REPORT_PARAMS! |
989 | Necessary to do the right thing upon invalidate-remote on a disconnected resource */ | |
990 | if (oc < C_WF_REPORT_PARAMS && nc >= C_CONNECTED) | |
991 | return SS_NEED_CONNECTION; | |
992 | ||
3509502d | 993 | /* After a network error only C_UNCONNECTED or C_DISCONNECTING may follow. */ |
fda74117 | 994 | if (oc >= C_TIMEOUT && oc <= C_TEAR_DOWN && nc != C_UNCONNECTED && nc != C_DISCONNECTING) |
d9cc6e23 | 995 | return SS_IN_TRANSIENT_STATE; |
3509502d PR |
996 | |
997 | /* After C_DISCONNECTING only C_STANDALONE may follow */ | |
fda74117 | 998 | if (oc == C_DISCONNECTING && nc != C_STANDALONE) |
d9cc6e23 | 999 | return SS_IN_TRANSIENT_STATE; |
3509502d | 1000 | |
d9cc6e23 | 1001 | return SS_SUCCESS; |
fda74117 PR |
1002 | } |
1003 | ||
1004 | ||
1005 | /** | |
1006 | * is_valid_transition() - Returns an SS_ error code if the state transition is not possible | |
1007 | * This limits hard state transitions. Hard state transitions are facts there are | |
1008 | * imposed on DRBD by the environment. E.g. disk broke or network broke down. | |
1009 | * But those hard state transitions are still not allowed to do everything. | |
1010 | * @ns: new state. | |
1011 | * @os: old state. | |
1012 | */ | |
1013 | static enum drbd_state_rv | |
1014 | is_valid_transition(union drbd_state os, union drbd_state ns) | |
1015 | { | |
1016 | enum drbd_state_rv rv; | |
1017 | ||
1018 | rv = is_valid_conn_transition(os.conn, ns.conn); | |
1019 | ||
3509502d PR |
1020 | /* we cannot fail (again) if we already detached */ |
1021 | if (ns.disk == D_FAILED && os.disk == D_DISKLESS) | |
1022 | rv = SS_IS_DISKLESS; | |
1023 | ||
1024 | return rv; | |
1025 | } | |
1026 | ||
b30ab791 | 1027 | static void print_sanitize_warnings(struct drbd_device *device, enum sanitize_state_warnings warn) |
d942ae44 PR |
1028 | { |
1029 | static const char *msg_table[] = { | |
1030 | [NO_WARNING] = "", | |
1031 | [ABORTED_ONLINE_VERIFY] = "Online-verify aborted.", | |
1032 | [ABORTED_RESYNC] = "Resync aborted.", | |
1033 | [CONNECTION_LOST_NEGOTIATING] = "Connection lost while negotiating, no data!", | |
1034 | [IMPLICITLY_UPGRADED_DISK] = "Implicitly upgraded disk", | |
1035 | [IMPLICITLY_UPGRADED_PDSK] = "Implicitly upgraded pdsk", | |
1036 | }; | |
1037 | ||
1038 | if (warn != NO_WARNING) | |
d0180171 | 1039 | drbd_warn(device, "%s\n", msg_table[warn]); |
d942ae44 PR |
1040 | } |
1041 | ||
b8907339 PR |
1042 | /** |
1043 | * sanitize_state() - Resolves implicitly necessary additional changes to a state transition | |
b30ab791 | 1044 | * @device: DRBD device. |
b8907339 PR |
1045 | * @os: old state. |
1046 | * @ns: new state. | |
49ece311 | 1047 | * @warn: placeholder for returned state warning. |
b8907339 PR |
1048 | * |
1049 | * When we loose connection, we have to set the state of the peers disk (pdsk) | |
1050 | * to D_UNKNOWN. This rule and many more along those lines are in this function. | |
1051 | */ | |
d7fe69c6 PR |
1052 | static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os, |
1053 | union drbd_state ns, enum sanitize_state_warnings *warn) | |
b8907339 PR |
1054 | { |
1055 | enum drbd_fencing_p fp; | |
1056 | enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max; | |
1057 | ||
d942ae44 PR |
1058 | if (warn) |
1059 | *warn = NO_WARNING; | |
1060 | ||
b8907339 | 1061 | fp = FP_DONT_CARE; |
b30ab791 | 1062 | if (get_ldev(device)) { |
daeda1cc | 1063 | rcu_read_lock(); |
b30ab791 | 1064 | fp = rcu_dereference(device->ldev->disk_conf)->fencing; |
daeda1cc | 1065 | rcu_read_unlock(); |
b30ab791 | 1066 | put_ldev(device); |
b8907339 PR |
1067 | } |
1068 | ||
3509502d | 1069 | /* Implications from connection to peer and peer_isp */ |
b8907339 PR |
1070 | if (ns.conn < C_CONNECTED) { |
1071 | ns.peer_isp = 0; | |
1072 | ns.peer = R_UNKNOWN; | |
1073 | if (ns.pdsk > D_UNKNOWN || ns.pdsk < D_INCONSISTENT) | |
1074 | ns.pdsk = D_UNKNOWN; | |
1075 | } | |
1076 | ||
1077 | /* Clear the aftr_isp when becoming unconfigured */ | |
1078 | if (ns.conn == C_STANDALONE && ns.disk == D_DISKLESS && ns.role == R_SECONDARY) | |
1079 | ns.aftr_isp = 0; | |
1080 | ||
4308a0a3 | 1081 | /* An implication of the disk states onto the connection state */ |
b8907339 | 1082 | /* Abort resync if a disk fails/detaches */ |
4308a0a3 | 1083 | if (ns.conn > C_CONNECTED && (ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) { |
d942ae44 PR |
1084 | if (warn) |
1085 | *warn = ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ? | |
1086 | ABORTED_ONLINE_VERIFY : ABORTED_RESYNC; | |
b8907339 PR |
1087 | ns.conn = C_CONNECTED; |
1088 | } | |
1089 | ||
1090 | /* Connection breaks down before we finished "Negotiating" */ | |
1091 | if (ns.conn < C_CONNECTED && ns.disk == D_NEGOTIATING && | |
b30ab791 AG |
1092 | get_ldev_if_state(device, D_NEGOTIATING)) { |
1093 | if (device->ed_uuid == device->ldev->md.uuid[UI_CURRENT]) { | |
1094 | ns.disk = device->new_state_tmp.disk; | |
1095 | ns.pdsk = device->new_state_tmp.pdsk; | |
b8907339 | 1096 | } else { |
d942ae44 PR |
1097 | if (warn) |
1098 | *warn = CONNECTION_LOST_NEGOTIATING; | |
b8907339 PR |
1099 | ns.disk = D_DISKLESS; |
1100 | ns.pdsk = D_UNKNOWN; | |
1101 | } | |
b30ab791 | 1102 | put_ldev(device); |
b8907339 PR |
1103 | } |
1104 | ||
1105 | /* D_CONSISTENT and D_OUTDATED vanish when we get connected */ | |
1106 | if (ns.conn >= C_CONNECTED && ns.conn < C_AHEAD) { | |
1107 | if (ns.disk == D_CONSISTENT || ns.disk == D_OUTDATED) | |
1108 | ns.disk = D_UP_TO_DATE; | |
1109 | if (ns.pdsk == D_CONSISTENT || ns.pdsk == D_OUTDATED) | |
1110 | ns.pdsk = D_UP_TO_DATE; | |
1111 | } | |
1112 | ||
a2823ea9 | 1113 | /* Implications of the connection state on the disk states */ |
b8907339 PR |
1114 | disk_min = D_DISKLESS; |
1115 | disk_max = D_UP_TO_DATE; | |
1116 | pdsk_min = D_INCONSISTENT; | |
1117 | pdsk_max = D_UNKNOWN; | |
1118 | switch ((enum drbd_conns)ns.conn) { | |
1119 | case C_WF_BITMAP_T: | |
1120 | case C_PAUSED_SYNC_T: | |
1121 | case C_STARTING_SYNC_T: | |
1122 | case C_WF_SYNC_UUID: | |
1123 | case C_BEHIND: | |
1124 | disk_min = D_INCONSISTENT; | |
1125 | disk_max = D_OUTDATED; | |
1126 | pdsk_min = D_UP_TO_DATE; | |
1127 | pdsk_max = D_UP_TO_DATE; | |
1128 | break; | |
1129 | case C_VERIFY_S: | |
1130 | case C_VERIFY_T: | |
1131 | disk_min = D_UP_TO_DATE; | |
1132 | disk_max = D_UP_TO_DATE; | |
1133 | pdsk_min = D_UP_TO_DATE; | |
1134 | pdsk_max = D_UP_TO_DATE; | |
1135 | break; | |
1136 | case C_CONNECTED: | |
1137 | disk_min = D_DISKLESS; | |
1138 | disk_max = D_UP_TO_DATE; | |
1139 | pdsk_min = D_DISKLESS; | |
1140 | pdsk_max = D_UP_TO_DATE; | |
1141 | break; | |
1142 | case C_WF_BITMAP_S: | |
1143 | case C_PAUSED_SYNC_S: | |
1144 | case C_STARTING_SYNC_S: | |
1145 | case C_AHEAD: | |
1146 | disk_min = D_UP_TO_DATE; | |
1147 | disk_max = D_UP_TO_DATE; | |
1148 | pdsk_min = D_INCONSISTENT; | |
1149 | pdsk_max = D_CONSISTENT; /* D_OUTDATED would be nice. But explicit outdate necessary*/ | |
1150 | break; | |
1151 | case C_SYNC_TARGET: | |
1152 | disk_min = D_INCONSISTENT; | |
1153 | disk_max = D_INCONSISTENT; | |
1154 | pdsk_min = D_UP_TO_DATE; | |
1155 | pdsk_max = D_UP_TO_DATE; | |
1156 | break; | |
1157 | case C_SYNC_SOURCE: | |
1158 | disk_min = D_UP_TO_DATE; | |
1159 | disk_max = D_UP_TO_DATE; | |
1160 | pdsk_min = D_INCONSISTENT; | |
1161 | pdsk_max = D_INCONSISTENT; | |
1162 | break; | |
1163 | case C_STANDALONE: | |
1164 | case C_DISCONNECTING: | |
1165 | case C_UNCONNECTED: | |
1166 | case C_TIMEOUT: | |
1167 | case C_BROKEN_PIPE: | |
1168 | case C_NETWORK_FAILURE: | |
1169 | case C_PROTOCOL_ERROR: | |
1170 | case C_TEAR_DOWN: | |
1171 | case C_WF_CONNECTION: | |
1172 | case C_WF_REPORT_PARAMS: | |
1173 | case C_MASK: | |
1174 | break; | |
1175 | } | |
1176 | if (ns.disk > disk_max) | |
1177 | ns.disk = disk_max; | |
1178 | ||
1179 | if (ns.disk < disk_min) { | |
d942ae44 PR |
1180 | if (warn) |
1181 | *warn = IMPLICITLY_UPGRADED_DISK; | |
b8907339 PR |
1182 | ns.disk = disk_min; |
1183 | } | |
1184 | if (ns.pdsk > pdsk_max) | |
1185 | ns.pdsk = pdsk_max; | |
1186 | ||
1187 | if (ns.pdsk < pdsk_min) { | |
d942ae44 PR |
1188 | if (warn) |
1189 | *warn = IMPLICITLY_UPGRADED_PDSK; | |
b8907339 PR |
1190 | ns.pdsk = pdsk_min; |
1191 | } | |
1192 | ||
1193 | if (fp == FP_STONITH && | |
d7fe69c6 PR |
1194 | (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED) && |
1195 | !(os.role == R_PRIMARY && os.conn < C_CONNECTED && os.pdsk > D_OUTDATED)) | |
b8907339 PR |
1196 | ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */ |
1197 | ||
eb6bea67 | 1198 | if (device->resource->res_opts.on_no_data == OND_SUSPEND_IO && |
d7fe69c6 PR |
1199 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) && |
1200 | !(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE)) | |
b8907339 PR |
1201 | ns.susp_nod = 1; /* Suspend IO while no data available (no accessible data available) */ |
1202 | ||
1203 | if (ns.aftr_isp || ns.peer_isp || ns.user_isp) { | |
1204 | if (ns.conn == C_SYNC_SOURCE) | |
1205 | ns.conn = C_PAUSED_SYNC_S; | |
1206 | if (ns.conn == C_SYNC_TARGET) | |
1207 | ns.conn = C_PAUSED_SYNC_T; | |
1208 | } else { | |
1209 | if (ns.conn == C_PAUSED_SYNC_S) | |
1210 | ns.conn = C_SYNC_SOURCE; | |
1211 | if (ns.conn == C_PAUSED_SYNC_T) | |
1212 | ns.conn = C_SYNC_TARGET; | |
1213 | } | |
1214 | ||
1215 | return ns; | |
1216 | } | |
1217 | ||
b30ab791 | 1218 | void drbd_resume_al(struct drbd_device *device) |
b8907339 | 1219 | { |
b30ab791 | 1220 | if (test_and_clear_bit(AL_SUSPENDED, &device->flags)) |
d0180171 | 1221 | drbd_info(device, "Resumed AL updates\n"); |
b8907339 PR |
1222 | } |
1223 | ||
28bc3b8c | 1224 | /* helper for _drbd_set_state */ |
0d11f3cf | 1225 | static void set_ov_position(struct drbd_peer_device *peer_device, enum drbd_conns cs) |
b8907339 | 1226 | { |
0d11f3cf CB |
1227 | struct drbd_device *device = peer_device->device; |
1228 | ||
1229 | if (peer_device->connection->agreed_pro_version < 90) | |
b30ab791 AG |
1230 | device->ov_start_sector = 0; |
1231 | device->rs_total = drbd_bm_bits(device); | |
1232 | device->ov_position = 0; | |
b8907339 PR |
1233 | if (cs == C_VERIFY_T) { |
1234 | /* starting online verify from an arbitrary position | |
1235 | * does not fit well into the existing protocol. | |
1236 | * on C_VERIFY_T, we initialize ov_left and friends | |
1237 | * implicitly in receive_DataRequest once the | |
1238 | * first P_OV_REQUEST is received */ | |
b30ab791 | 1239 | device->ov_start_sector = ~(sector_t)0; |
b8907339 | 1240 | } else { |
b30ab791 AG |
1241 | unsigned long bit = BM_SECT_TO_BIT(device->ov_start_sector); |
1242 | if (bit >= device->rs_total) { | |
1243 | device->ov_start_sector = | |
1244 | BM_BIT_TO_SECT(device->rs_total - 1); | |
1245 | device->rs_total = 1; | |
b8907339 | 1246 | } else |
b30ab791 AG |
1247 | device->rs_total -= bit; |
1248 | device->ov_position = device->ov_start_sector; | |
b8907339 | 1249 | } |
b30ab791 | 1250 | device->ov_left = device->rs_total; |
b8907339 PR |
1251 | } |
1252 | ||
1253 | /** | |
28bc3b8c | 1254 | * _drbd_set_state() - Set a new DRBD state |
b30ab791 | 1255 | * @device: DRBD device. |
b8907339 PR |
1256 | * @ns: new state. |
1257 | * @flags: Flags | |
1258 | * @done: Optional completion, that will get completed after the after_state_ch() finished | |
1259 | * | |
28bc3b8c | 1260 | * Caller needs to hold req_lock. Do not call directly. |
b8907339 PR |
1261 | */ |
1262 | enum drbd_state_rv | |
28bc3b8c AG |
1263 | _drbd_set_state(struct drbd_device *device, union drbd_state ns, |
1264 | enum chg_state_flags flags, struct completion *done) | |
b8907339 | 1265 | { |
44a4d551 LE |
1266 | struct drbd_peer_device *peer_device = first_peer_device(device); |
1267 | struct drbd_connection *connection = peer_device ? peer_device->connection : NULL; | |
b8907339 PR |
1268 | union drbd_state os; |
1269 | enum drbd_state_rv rv = SS_SUCCESS; | |
d942ae44 | 1270 | enum sanitize_state_warnings ssw; |
b8907339 | 1271 | struct after_state_chg_work *ascw; |
a2972846 | 1272 | struct drbd_state_change *state_change; |
b8907339 | 1273 | |
b30ab791 | 1274 | os = drbd_read_state(device); |
b8907339 | 1275 | |
d7fe69c6 | 1276 | ns = sanitize_state(device, os, ns, &ssw); |
b8907339 PR |
1277 | if (ns.i == os.i) |
1278 | return SS_NOTHING_TO_DO; | |
1279 | ||
3509502d PR |
1280 | rv = is_valid_transition(os, ns); |
1281 | if (rv < SS_SUCCESS) | |
1282 | return rv; | |
1283 | ||
b8907339 PR |
1284 | if (!(flags & CS_HARD)) { |
1285 | /* pre-state-change checks ; only look at ns */ | |
1286 | /* See drbd_state_sw_errors in drbd_strings.c */ | |
1287 | ||
b30ab791 | 1288 | rv = is_valid_state(device, ns); |
b8907339 PR |
1289 | if (rv < SS_SUCCESS) { |
1290 | /* If the old state was illegal as well, then let | |
1291 | this happen...*/ | |
1292 | ||
b30ab791 | 1293 | if (is_valid_state(device, os) == rv) |
44a4d551 | 1294 | rv = is_valid_soft_transition(os, ns, connection); |
b8907339 | 1295 | } else |
44a4d551 | 1296 | rv = is_valid_soft_transition(os, ns, connection); |
b8907339 PR |
1297 | } |
1298 | ||
1299 | if (rv < SS_SUCCESS) { | |
1300 | if (flags & CS_VERBOSE) | |
b30ab791 | 1301 | print_st_err(device, os, ns, rv); |
b8907339 PR |
1302 | return rv; |
1303 | } | |
1304 | ||
b30ab791 | 1305 | print_sanitize_warnings(device, ssw); |
b8907339 | 1306 | |
b30ab791 | 1307 | drbd_pr_state_change(device, os, ns, flags); |
b8907339 | 1308 | |
706cb24c PR |
1309 | /* Display changes to the susp* flags that where caused by the call to |
1310 | sanitize_state(). Only display it here if we where not called from | |
1311 | _conn_request_state() */ | |
1312 | if (!(flags & CS_DC_SUSP)) | |
44a4d551 | 1313 | conn_pr_state_change(connection, os, ns, |
a6b32bc3 | 1314 | (flags & ~CS_DC_MASK) | CS_DC_SUSP); |
706cb24c | 1315 | |
b8907339 PR |
1316 | /* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference |
1317 | * on the ldev here, to be sure the transition -> D_DISKLESS resp. | |
1318 | * drbd_ldev_destroy() won't happen before our corresponding | |
1319 | * after_state_ch works run, where we put_ldev again. */ | |
1320 | if ((os.disk != D_FAILED && ns.disk == D_FAILED) || | |
1321 | (os.disk != D_DISKLESS && ns.disk == D_DISKLESS)) | |
b30ab791 | 1322 | atomic_inc(&device->local_cnt); |
b8907339 | 1323 | |
5ab7d2c0 LE |
1324 | if (!is_sync_state(os.conn) && is_sync_state(ns.conn)) |
1325 | clear_bit(RS_DONE, &device->flags); | |
1326 | ||
a2972846 AG |
1327 | /* FIXME: Have any flags been set earlier in this function already? */ |
1328 | state_change = remember_old_state(device->resource, GFP_ATOMIC); | |
1329 | ||
ba3c6fb8 LE |
1330 | /* changes to local_cnt and device flags should be visible before |
1331 | * changes to state, which again should be visible before anything else | |
1332 | * depending on that change happens. */ | |
1333 | smp_wmb(); | |
b30ab791 | 1334 | device->state.i = ns.i; |
6bbf53ca AG |
1335 | device->resource->susp = ns.susp; |
1336 | device->resource->susp_nod = ns.susp_nod; | |
1337 | device->resource->susp_fen = ns.susp_fen; | |
ba3c6fb8 | 1338 | smp_wmb(); |
b8907339 | 1339 | |
a2972846 AG |
1340 | remember_new_state(state_change); |
1341 | ||
2681f7f6 | 1342 | /* put replicated vs not-replicated requests in seperate epochs */ |
ba3c6fb8 LE |
1343 | if (drbd_should_do_remote((union drbd_dev_state)os.i) != |
1344 | drbd_should_do_remote((union drbd_dev_state)ns.i)) | |
44a4d551 | 1345 | start_new_tl_epoch(connection); |
2681f7f6 | 1346 | |
b8907339 | 1347 | if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING) |
b30ab791 | 1348 | drbd_print_uuids(device, "attached to UUIDs"); |
b8907339 | 1349 | |
79702011 PR |
1350 | /* Wake up role changes, that were delayed because of connection establishing */ |
1351 | if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS && | |
a8821531 | 1352 | no_peer_wf_report_params(connection)) { |
44a4d551 | 1353 | clear_bit(STATE_SENT, &connection->flags); |
a8821531 PR |
1354 | wake_up_all_devices(connection); |
1355 | } | |
79702011 | 1356 | |
b30ab791 AG |
1357 | wake_up(&device->misc_wait); |
1358 | wake_up(&device->state_wait); | |
44a4d551 | 1359 | wake_up(&connection->ping_wait); |
b8907339 | 1360 | |
58ffa580 LE |
1361 | /* Aborted verify run, or we reached the stop sector. |
1362 | * Log the last position, unless end-of-device. */ | |
b8907339 | 1363 | if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) && |
58ffa580 | 1364 | ns.conn <= C_CONNECTED) { |
b30ab791 AG |
1365 | device->ov_start_sector = |
1366 | BM_BIT_TO_SECT(drbd_bm_bits(device) - device->ov_left); | |
1367 | if (device->ov_left) | |
d0180171 | 1368 | drbd_info(device, "Online Verify reached sector %llu\n", |
b30ab791 | 1369 | (unsigned long long)device->ov_start_sector); |
b8907339 PR |
1370 | } |
1371 | ||
1372 | if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) && | |
1373 | (ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)) { | |
d0180171 | 1374 | drbd_info(device, "Syncer continues.\n"); |
b30ab791 AG |
1375 | device->rs_paused += (long)jiffies |
1376 | -(long)device->rs_mark_time[device->rs_last_mark]; | |
b8907339 | 1377 | if (ns.conn == C_SYNC_TARGET) |
b30ab791 | 1378 | mod_timer(&device->resync_timer, jiffies); |
b8907339 PR |
1379 | } |
1380 | ||
1381 | if ((os.conn == C_SYNC_TARGET || os.conn == C_SYNC_SOURCE) && | |
1382 | (ns.conn == C_PAUSED_SYNC_T || ns.conn == C_PAUSED_SYNC_S)) { | |
d0180171 | 1383 | drbd_info(device, "Resync suspended\n"); |
b30ab791 | 1384 | device->rs_mark_time[device->rs_last_mark] = jiffies; |
b8907339 PR |
1385 | } |
1386 | ||
1387 | if (os.conn == C_CONNECTED && | |
1388 | (ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T)) { | |
1389 | unsigned long now = jiffies; | |
1390 | int i; | |
1391 | ||
0d11f3cf | 1392 | set_ov_position(peer_device, ns.conn); |
b30ab791 | 1393 | device->rs_start = now; |
b30ab791 AG |
1394 | device->rs_last_sect_ev = 0; |
1395 | device->ov_last_oos_size = 0; | |
1396 | device->ov_last_oos_start = 0; | |
b8907339 PR |
1397 | |
1398 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { | |
b30ab791 AG |
1399 | device->rs_mark_left[i] = device->ov_left; |
1400 | device->rs_mark_time[i] = now; | |
b8907339 PR |
1401 | } |
1402 | ||
0d11f3cf | 1403 | drbd_rs_controller_reset(peer_device); |
b8907339 PR |
1404 | |
1405 | if (ns.conn == C_VERIFY_S) { | |
d0180171 | 1406 | drbd_info(device, "Starting Online Verify from sector %llu\n", |
b30ab791 AG |
1407 | (unsigned long long)device->ov_position); |
1408 | mod_timer(&device->resync_timer, jiffies); | |
b8907339 PR |
1409 | } |
1410 | } | |
1411 | ||
b30ab791 AG |
1412 | if (get_ldev(device)) { |
1413 | u32 mdf = device->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND| | |
b8907339 PR |
1414 | MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE| |
1415 | MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY); | |
1416 | ||
d5d7ebd4 | 1417 | mdf &= ~MDF_AL_CLEAN; |
b30ab791 | 1418 | if (test_bit(CRASHED_PRIMARY, &device->flags)) |
b8907339 | 1419 | mdf |= MDF_CRASHED_PRIMARY; |
b30ab791 AG |
1420 | if (device->state.role == R_PRIMARY || |
1421 | (device->state.pdsk < D_INCONSISTENT && device->state.peer == R_PRIMARY)) | |
b8907339 | 1422 | mdf |= MDF_PRIMARY_IND; |
b30ab791 | 1423 | if (device->state.conn > C_WF_REPORT_PARAMS) |
b8907339 | 1424 | mdf |= MDF_CONNECTED_IND; |
b30ab791 | 1425 | if (device->state.disk > D_INCONSISTENT) |
b8907339 | 1426 | mdf |= MDF_CONSISTENT; |
b30ab791 | 1427 | if (device->state.disk > D_OUTDATED) |
b8907339 | 1428 | mdf |= MDF_WAS_UP_TO_DATE; |
b30ab791 | 1429 | if (device->state.pdsk <= D_OUTDATED && device->state.pdsk >= D_INCONSISTENT) |
b8907339 | 1430 | mdf |= MDF_PEER_OUT_DATED; |
b30ab791 AG |
1431 | if (mdf != device->ldev->md.flags) { |
1432 | device->ldev->md.flags = mdf; | |
1433 | drbd_md_mark_dirty(device); | |
b8907339 PR |
1434 | } |
1435 | if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT) | |
b30ab791 AG |
1436 | drbd_set_ed_uuid(device, device->ldev->md.uuid[UI_CURRENT]); |
1437 | put_ldev(device); | |
b8907339 PR |
1438 | } |
1439 | ||
1440 | /* Peer was forced D_UP_TO_DATE & R_PRIMARY, consider to resync */ | |
1441 | if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT && | |
1442 | os.peer == R_SECONDARY && ns.peer == R_PRIMARY) | |
b30ab791 | 1443 | set_bit(CONSIDER_RESYNC, &device->flags); |
b8907339 PR |
1444 | |
1445 | /* Receiver should clean up itself */ | |
1446 | if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING) | |
44a4d551 | 1447 | drbd_thread_stop_nowait(&connection->receiver); |
b8907339 PR |
1448 | |
1449 | /* Now the receiver finished cleaning up itself, it should die */ | |
1450 | if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE) | |
44a4d551 | 1451 | drbd_thread_stop_nowait(&connection->receiver); |
b8907339 PR |
1452 | |
1453 | /* Upon network failure, we need to restart the receiver. */ | |
823bd832 | 1454 | if (os.conn > C_WF_CONNECTION && |
b8907339 | 1455 | ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT) |
44a4d551 | 1456 | drbd_thread_restart_nowait(&connection->receiver); |
b8907339 PR |
1457 | |
1458 | /* Resume AL writing if we get a connection */ | |
28e448bb | 1459 | if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { |
b30ab791 | 1460 | drbd_resume_al(device); |
44a4d551 | 1461 | connection->connect_cnt++; |
28e448bb | 1462 | } |
b8907339 | 1463 | |
07be15b1 LE |
1464 | /* remember last attach time so request_timer_fn() won't |
1465 | * kill newly established sessions while we are still trying to thaw | |
1466 | * previously frozen IO */ | |
1467 | if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) && | |
1468 | ns.disk > D_NEGOTIATING) | |
b30ab791 | 1469 | device->last_reattach_jif = jiffies; |
07be15b1 | 1470 | |
b8907339 PR |
1471 | ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC); |
1472 | if (ascw) { | |
1473 | ascw->os = os; | |
1474 | ascw->ns = ns; | |
1475 | ascw->flags = flags; | |
1476 | ascw->w.cb = w_after_state_ch; | |
84b8c06b | 1477 | ascw->device = device; |
b8907339 | 1478 | ascw->done = done; |
a2972846 | 1479 | ascw->state_change = state_change; |
44a4d551 | 1480 | drbd_queue_work(&connection->sender_work, |
84b8c06b | 1481 | &ascw->w); |
b8907339 | 1482 | } else { |
d0180171 | 1483 | drbd_err(device, "Could not kmalloc an ascw\n"); |
b8907339 PR |
1484 | } |
1485 | ||
1486 | return rv; | |
1487 | } | |
1488 | ||
99920dc5 | 1489 | static int w_after_state_ch(struct drbd_work *w, int unused) |
b8907339 PR |
1490 | { |
1491 | struct after_state_chg_work *ascw = | |
1492 | container_of(w, struct after_state_chg_work, w); | |
84b8c06b | 1493 | struct drbd_device *device = ascw->device; |
b8907339 | 1494 | |
a2972846 AG |
1495 | after_state_ch(device, ascw->os, ascw->ns, ascw->flags, ascw->state_change); |
1496 | forget_state_change(ascw->state_change); | |
137975c1 | 1497 | if (ascw->flags & CS_WAIT_COMPLETE) |
b8907339 | 1498 | complete(ascw->done); |
b8907339 PR |
1499 | kfree(ascw); |
1500 | ||
99920dc5 | 1501 | return 0; |
b8907339 PR |
1502 | } |
1503 | ||
b30ab791 | 1504 | static void abw_start_sync(struct drbd_device *device, int rv) |
b8907339 PR |
1505 | { |
1506 | if (rv) { | |
d0180171 | 1507 | drbd_err(device, "Writing the bitmap failed not starting resync.\n"); |
b30ab791 | 1508 | _drbd_request_state(device, NS(conn, C_CONNECTED), CS_VERBOSE); |
b8907339 PR |
1509 | return; |
1510 | } | |
1511 | ||
b30ab791 | 1512 | switch (device->state.conn) { |
b8907339 | 1513 | case C_STARTING_SYNC_T: |
b30ab791 | 1514 | _drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE); |
b8907339 PR |
1515 | break; |
1516 | case C_STARTING_SYNC_S: | |
b30ab791 | 1517 | drbd_start_resync(device, C_SYNC_SOURCE); |
b8907339 PR |
1518 | break; |
1519 | } | |
1520 | } | |
1521 | ||
b30ab791 | 1522 | int drbd_bitmap_io_from_worker(struct drbd_device *device, |
8164dd6c AG |
1523 | int (*io_fn)(struct drbd_device *, struct drbd_peer_device *), |
1524 | char *why, enum bm_flag flags, | |
1525 | struct drbd_peer_device *peer_device) | |
b8907339 PR |
1526 | { |
1527 | int rv; | |
1528 | ||
0b0ba1ef | 1529 | D_ASSERT(device, current == first_peer_device(device)->connection->worker.task); |
b8907339 | 1530 | |
b30ab791 | 1531 | /* open coded non-blocking drbd_suspend_io(device); */ |
7dbb4386 | 1532 | atomic_inc(&device->suspend_cnt); |
b8907339 | 1533 | |
b30ab791 | 1534 | drbd_bm_lock(device, why, flags); |
8164dd6c | 1535 | rv = io_fn(device, peer_device); |
b30ab791 | 1536 | drbd_bm_unlock(device); |
b8907339 | 1537 | |
b30ab791 | 1538 | drbd_resume_io(device); |
b8907339 PR |
1539 | |
1540 | return rv; | |
1541 | } | |
1542 | ||
aadb22ba | 1543 | int notify_resource_state_change(struct sk_buff *skb, |
a2972846 | 1544 | unsigned int seq, |
fe0b1e9a | 1545 | void *state_change, |
a2972846 AG |
1546 | enum drbd_notification_type type) |
1547 | { | |
fe0b1e9a | 1548 | struct drbd_resource_state_change *resource_state_change = state_change; |
a2972846 AG |
1549 | struct drbd_resource *resource = resource_state_change->resource; |
1550 | struct resource_info resource_info = { | |
1551 | .res_role = resource_state_change->role[NEW], | |
1552 | .res_susp = resource_state_change->susp[NEW], | |
1553 | .res_susp_nod = resource_state_change->susp_nod[NEW], | |
1554 | .res_susp_fen = resource_state_change->susp_fen[NEW], | |
1555 | }; | |
1556 | ||
aadb22ba | 1557 | return notify_resource_state(skb, seq, resource, &resource_info, type); |
a2972846 AG |
1558 | } |
1559 | ||
aadb22ba | 1560 | int notify_connection_state_change(struct sk_buff *skb, |
a2972846 | 1561 | unsigned int seq, |
fe0b1e9a | 1562 | void *state_change, |
a2972846 AG |
1563 | enum drbd_notification_type type) |
1564 | { | |
fe0b1e9a AB |
1565 | struct drbd_connection_state_change *p = state_change; |
1566 | struct drbd_connection *connection = p->connection; | |
a2972846 | 1567 | struct connection_info connection_info = { |
fe0b1e9a AB |
1568 | .conn_connection_state = p->cstate[NEW], |
1569 | .conn_role = p->peer_role[NEW], | |
a2972846 AG |
1570 | }; |
1571 | ||
aadb22ba | 1572 | return notify_connection_state(skb, seq, connection, &connection_info, type); |
a2972846 AG |
1573 | } |
1574 | ||
aadb22ba | 1575 | int notify_device_state_change(struct sk_buff *skb, |
a2972846 | 1576 | unsigned int seq, |
fe0b1e9a | 1577 | void *state_change, |
a2972846 AG |
1578 | enum drbd_notification_type type) |
1579 | { | |
fe0b1e9a | 1580 | struct drbd_device_state_change *device_state_change = state_change; |
a2972846 AG |
1581 | struct drbd_device *device = device_state_change->device; |
1582 | struct device_info device_info = { | |
1583 | .dev_disk_state = device_state_change->disk_state[NEW], | |
1584 | }; | |
1585 | ||
aadb22ba | 1586 | return notify_device_state(skb, seq, device, &device_info, type); |
a2972846 AG |
1587 | } |
1588 | ||
aadb22ba | 1589 | int notify_peer_device_state_change(struct sk_buff *skb, |
a2972846 | 1590 | unsigned int seq, |
fe0b1e9a | 1591 | void *state_change, |
a2972846 AG |
1592 | enum drbd_notification_type type) |
1593 | { | |
fe0b1e9a | 1594 | struct drbd_peer_device_state_change *p = state_change; |
a2972846 AG |
1595 | struct drbd_peer_device *peer_device = p->peer_device; |
1596 | struct peer_device_info peer_device_info = { | |
1597 | .peer_repl_state = p->repl_state[NEW], | |
1598 | .peer_disk_state = p->disk_state[NEW], | |
1599 | .peer_resync_susp_user = p->resync_susp_user[NEW], | |
1600 | .peer_resync_susp_peer = p->resync_susp_peer[NEW], | |
1601 | .peer_resync_susp_dependency = p->resync_susp_dependency[NEW], | |
1602 | }; | |
1603 | ||
aadb22ba | 1604 | return notify_peer_device_state(skb, seq, peer_device, &peer_device_info, type); |
a2972846 AG |
1605 | } |
1606 | ||
1607 | static void broadcast_state_change(struct drbd_state_change *state_change) | |
1608 | { | |
1609 | struct drbd_resource_state_change *resource_state_change = &state_change->resource[0]; | |
1610 | bool resource_state_has_changed; | |
1611 | unsigned int n_device, n_connection, n_peer_device, n_peer_devices; | |
fe0b1e9a AB |
1612 | int (*last_func)(struct sk_buff *, unsigned int, |
1613 | void *, enum drbd_notification_type) = NULL; | |
805cdb8b | 1614 | void *last_arg = NULL; |
a2972846 AG |
1615 | |
1616 | #define HAS_CHANGED(state) ((state)[OLD] != (state)[NEW]) | |
1617 | #define FINAL_STATE_CHANGE(type) \ | |
1618 | ({ if (last_func) \ | |
1619 | last_func(NULL, 0, last_arg, type); \ | |
1620 | }) | |
1621 | #define REMEMBER_STATE_CHANGE(func, arg, type) \ | |
1622 | ({ FINAL_STATE_CHANGE(type | NOTIFY_CONTINUES); \ | |
fe0b1e9a | 1623 | last_func = func; \ |
a2972846 AG |
1624 | last_arg = arg; \ |
1625 | }) | |
1626 | ||
1627 | mutex_lock(¬ification_mutex); | |
1628 | ||
1629 | resource_state_has_changed = | |
1630 | HAS_CHANGED(resource_state_change->role) || | |
1631 | HAS_CHANGED(resource_state_change->susp) || | |
1632 | HAS_CHANGED(resource_state_change->susp_nod) || | |
1633 | HAS_CHANGED(resource_state_change->susp_fen); | |
1634 | ||
1635 | if (resource_state_has_changed) | |
1636 | REMEMBER_STATE_CHANGE(notify_resource_state_change, | |
1637 | resource_state_change, NOTIFY_CHANGE); | |
1638 | ||
1639 | for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) { | |
1640 | struct drbd_connection_state_change *connection_state_change = | |
1641 | &state_change->connections[n_connection]; | |
1642 | ||
1643 | if (HAS_CHANGED(connection_state_change->peer_role) || | |
1644 | HAS_CHANGED(connection_state_change->cstate)) | |
1645 | REMEMBER_STATE_CHANGE(notify_connection_state_change, | |
1646 | connection_state_change, NOTIFY_CHANGE); | |
1647 | } | |
1648 | ||
1649 | for (n_device = 0; n_device < state_change->n_devices; n_device++) { | |
1650 | struct drbd_device_state_change *device_state_change = | |
1651 | &state_change->devices[n_device]; | |
1652 | ||
1653 | if (HAS_CHANGED(device_state_change->disk_state)) | |
1654 | REMEMBER_STATE_CHANGE(notify_device_state_change, | |
1655 | device_state_change, NOTIFY_CHANGE); | |
1656 | } | |
1657 | ||
1658 | n_peer_devices = state_change->n_devices * state_change->n_connections; | |
1659 | for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) { | |
1660 | struct drbd_peer_device_state_change *p = | |
1661 | &state_change->peer_devices[n_peer_device]; | |
1662 | ||
1663 | if (HAS_CHANGED(p->disk_state) || | |
1664 | HAS_CHANGED(p->repl_state) || | |
1665 | HAS_CHANGED(p->resync_susp_user) || | |
1666 | HAS_CHANGED(p->resync_susp_peer) || | |
1667 | HAS_CHANGED(p->resync_susp_dependency)) | |
1668 | REMEMBER_STATE_CHANGE(notify_peer_device_state_change, | |
1669 | p, NOTIFY_CHANGE); | |
1670 | } | |
1671 | ||
1672 | FINAL_STATE_CHANGE(NOTIFY_CHANGE); | |
1673 | mutex_unlock(¬ification_mutex); | |
1674 | ||
1675 | #undef HAS_CHANGED | |
1676 | #undef FINAL_STATE_CHANGE | |
1677 | #undef REMEMBER_STATE_CHANGE | |
1678 | } | |
1679 | ||
20004e24 LE |
1680 | /* takes old and new peer disk state */ |
1681 | static bool lost_contact_to_peer_data(enum drbd_disk_state os, enum drbd_disk_state ns) | |
1682 | { | |
1683 | if ((os >= D_INCONSISTENT && os != D_UNKNOWN && os != D_OUTDATED) | |
1684 | && (ns < D_INCONSISTENT || ns == D_UNKNOWN || ns == D_OUTDATED)) | |
1685 | return true; | |
1686 | ||
1687 | /* Scenario, starting with normal operation | |
1688 | * Connected Primary/Secondary UpToDate/UpToDate | |
1689 | * NetworkFailure Primary/Unknown UpToDate/DUnknown (frozen) | |
1690 | * ... | |
1691 | * Connected Primary/Secondary UpToDate/Diskless (resumed; needs to bump uuid!) | |
1692 | */ | |
1693 | if (os == D_UNKNOWN | |
1694 | && (ns == D_DISKLESS || ns == D_FAILED || ns == D_OUTDATED)) | |
1695 | return true; | |
1696 | ||
1697 | return false; | |
1698 | } | |
1699 | ||
b8907339 PR |
1700 | /** |
1701 | * after_state_ch() - Perform after state change actions that may sleep | |
b30ab791 | 1702 | * @device: DRBD device. |
b8907339 PR |
1703 | * @os: old state. |
1704 | * @ns: new state. | |
1705 | * @flags: Flags | |
49ece311 | 1706 | * @state_change: state change to broadcast |
b8907339 | 1707 | */ |
b30ab791 | 1708 | static void after_state_ch(struct drbd_device *device, union drbd_state os, |
a2972846 AG |
1709 | union drbd_state ns, enum chg_state_flags flags, |
1710 | struct drbd_state_change *state_change) | |
b8907339 | 1711 | { |
6bbf53ca | 1712 | struct drbd_resource *resource = device->resource; |
44a4d551 LE |
1713 | struct drbd_peer_device *peer_device = first_peer_device(device); |
1714 | struct drbd_connection *connection = peer_device ? peer_device->connection : NULL; | |
3b98c0c2 LE |
1715 | struct sib_info sib; |
1716 | ||
a2972846 AG |
1717 | broadcast_state_change(state_change); |
1718 | ||
3b98c0c2 LE |
1719 | sib.sib_reason = SIB_STATE_CHANGE; |
1720 | sib.os = os; | |
1721 | sib.ns = ns; | |
b8907339 | 1722 | |
2f2abeae LE |
1723 | if ((os.disk != D_UP_TO_DATE || os.pdsk != D_UP_TO_DATE) |
1724 | && (ns.disk == D_UP_TO_DATE && ns.pdsk == D_UP_TO_DATE)) { | |
b30ab791 AG |
1725 | clear_bit(CRASHED_PRIMARY, &device->flags); |
1726 | if (device->p_uuid) | |
1727 | device->p_uuid[UI_FLAGS] &= ~((u64)2); | |
b8907339 PR |
1728 | } |
1729 | ||
b8907339 | 1730 | /* Inform userspace about the change... */ |
b30ab791 | 1731 | drbd_bcast_event(device, &sib); |
b8907339 PR |
1732 | |
1733 | if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) && | |
1734 | (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) | |
b30ab791 | 1735 | drbd_khelper(device, "pri-on-incon-degr"); |
b8907339 PR |
1736 | |
1737 | /* Here we have the actions that are performed after a | |
1738 | state change. This function might sleep */ | |
1739 | ||
b8907339 | 1740 | if (ns.susp_nod) { |
a6d00c8e PR |
1741 | enum drbd_req_event what = NOTHING; |
1742 | ||
0500813f | 1743 | spin_lock_irq(&device->resource->req_lock); |
bde89a9e | 1744 | if (os.conn < C_CONNECTED && conn_lowest_conn(connection) >= C_CONNECTED) |
b8907339 PR |
1745 | what = RESEND; |
1746 | ||
3fb4746d | 1747 | if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) && |
af61494a | 1748 | conn_lowest_disk(connection) == D_UP_TO_DATE) |
b8907339 PR |
1749 | what = RESTART_FROZEN_DISK_IO; |
1750 | ||
6bbf53ca | 1751 | if (resource->susp_nod && what != NOTHING) { |
bde89a9e AG |
1752 | _tl_restart(connection, what); |
1753 | _conn_request_state(connection, | |
892fdd1a PR |
1754 | (union drbd_state) { { .susp_nod = 1 } }, |
1755 | (union drbd_state) { { .susp_nod = 0 } }, | |
1756 | CS_VERBOSE); | |
b8907339 | 1757 | } |
0500813f | 1758 | spin_unlock_irq(&device->resource->req_lock); |
b8907339 PR |
1759 | } |
1760 | ||
88f79ec4 | 1761 | if (ns.susp_fen) { |
0500813f | 1762 | spin_lock_irq(&device->resource->req_lock); |
6bbf53ca | 1763 | if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) { |
88f79ec4 | 1764 | /* case2: The connection was established again: */ |
c06ece6b | 1765 | struct drbd_peer_device *peer_device; |
88f79ec4 PR |
1766 | int vnr; |
1767 | ||
1768 | rcu_read_lock(); | |
c06ece6b AG |
1769 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) |
1770 | clear_bit(NEW_CUR_UUID, &peer_device->device->flags); | |
88f79ec4 | 1771 | rcu_read_unlock(); |
20004e24 LE |
1772 | |
1773 | /* We should actively create a new uuid, _before_ | |
1774 | * we resume/resent, if the peer is diskless | |
1775 | * (recovery from a multiple error scenario). | |
1776 | * Currently, this happens with a slight delay | |
1777 | * below when checking lost_contact_to_peer_data() ... | |
1778 | */ | |
bde89a9e AG |
1779 | _tl_restart(connection, RESEND); |
1780 | _conn_request_state(connection, | |
88f79ec4 PR |
1781 | (union drbd_state) { { .susp_fen = 1 } }, |
1782 | (union drbd_state) { { .susp_fen = 0 } }, | |
1783 | CS_VERBOSE); | |
1784 | } | |
0500813f | 1785 | spin_unlock_irq(&device->resource->req_lock); |
88f79ec4 PR |
1786 | } |
1787 | ||
b8907339 PR |
1788 | /* Became sync source. With protocol >= 96, we still need to send out |
1789 | * the sync uuid now. Need to do that before any drbd_send_state, or | |
1790 | * the other side may go "paused sync" before receiving the sync uuids, | |
1791 | * which is unexpected. */ | |
1792 | if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) && | |
1793 | (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) && | |
44a4d551 LE |
1794 | connection->agreed_pro_version >= 96 && get_ldev(device)) { |
1795 | drbd_gen_and_send_sync_uuid(peer_device); | |
b30ab791 | 1796 | put_ldev(device); |
b8907339 PR |
1797 | } |
1798 | ||
1799 | /* Do not change the order of the if above and the two below... */ | |
369bea63 PR |
1800 | if (os.pdsk == D_DISKLESS && |
1801 | ns.pdsk > D_DISKLESS && ns.pdsk != D_UNKNOWN) { /* attach on the peer */ | |
a324896b LE |
1802 | /* we probably will start a resync soon. |
1803 | * make sure those things are properly reset. */ | |
b30ab791 AG |
1804 | device->rs_total = 0; |
1805 | device->rs_failed = 0; | |
1806 | atomic_set(&device->rs_pending_cnt, 0); | |
1807 | drbd_rs_cancel_all(device); | |
a324896b | 1808 | |
44a4d551 LE |
1809 | drbd_send_uuids(peer_device); |
1810 | drbd_send_state(peer_device, ns); | |
b8907339 PR |
1811 | } |
1812 | /* No point in queuing send_bitmap if we don't have a connection | |
1813 | * anymore, so check also the _current_ state, not only the new state | |
1814 | * at the time this work was queued. */ | |
1815 | if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S && | |
b30ab791 AG |
1816 | device->state.conn == C_WF_BITMAP_S) |
1817 | drbd_queue_bitmap_io(device, &drbd_send_bitmap, NULL, | |
b8907339 | 1818 | "send_bitmap (WFBitMapS)", |
8164dd6c | 1819 | BM_LOCKED_TEST_ALLOWED, peer_device); |
b8907339 PR |
1820 | |
1821 | /* Lost contact to peer's copy of the data */ | |
20004e24 | 1822 | if (lost_contact_to_peer_data(os.pdsk, ns.pdsk)) { |
b30ab791 | 1823 | if (get_ldev(device)) { |
b8907339 | 1824 | if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) && |
b30ab791 AG |
1825 | device->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { |
1826 | if (drbd_suspended(device)) { | |
1827 | set_bit(NEW_CUR_UUID, &device->flags); | |
b8907339 | 1828 | } else { |
b30ab791 | 1829 | drbd_uuid_new_current(device); |
44a4d551 | 1830 | drbd_send_uuids(peer_device); |
b8907339 PR |
1831 | } |
1832 | } | |
b30ab791 | 1833 | put_ldev(device); |
b8907339 PR |
1834 | } |
1835 | } | |
1836 | ||
b30ab791 | 1837 | if (ns.pdsk < D_INCONSISTENT && get_ldev(device)) { |
9bd2eb2c | 1838 | if (os.peer != R_PRIMARY && ns.peer == R_PRIMARY && |
b30ab791 AG |
1839 | device->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { |
1840 | drbd_uuid_new_current(device); | |
44a4d551 | 1841 | drbd_send_uuids(peer_device); |
0cfac5dd | 1842 | } |
b8907339 PR |
1843 | /* D_DISKLESS Peer becomes secondary */ |
1844 | if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY) | |
1845 | /* We may still be Primary ourselves. | |
1846 | * No harm done if the bitmap still changes, | |
1847 | * redirtied pages will follow later. */ | |
b30ab791 | 1848 | drbd_bitmap_io_from_worker(device, &drbd_bm_write, |
8164dd6c | 1849 | "demote diskless peer", BM_LOCKED_SET_ALLOWED, peer_device); |
b30ab791 | 1850 | put_ldev(device); |
b8907339 PR |
1851 | } |
1852 | ||
1853 | /* Write out all changed bits on demote. | |
1854 | * Though, no need to da that just yet | |
1855 | * if there is a resync going on still */ | |
1856 | if (os.role == R_PRIMARY && ns.role == R_SECONDARY && | |
b30ab791 | 1857 | device->state.conn <= C_CONNECTED && get_ldev(device)) { |
b8907339 PR |
1858 | /* No changes to the bitmap expected this time, so assert that, |
1859 | * even though no harm was done if it did change. */ | |
b30ab791 | 1860 | drbd_bitmap_io_from_worker(device, &drbd_bm_write, |
8164dd6c | 1861 | "demote", BM_LOCKED_TEST_ALLOWED, peer_device); |
b30ab791 | 1862 | put_ldev(device); |
b8907339 PR |
1863 | } |
1864 | ||
1865 | /* Last part of the attaching process ... */ | |
1866 | if (ns.conn >= C_CONNECTED && | |
1867 | os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) { | |
44a4d551 LE |
1868 | drbd_send_sizes(peer_device, 0, 0); /* to start sync... */ |
1869 | drbd_send_uuids(peer_device); | |
1870 | drbd_send_state(peer_device, ns); | |
b8907339 PR |
1871 | } |
1872 | ||
1873 | /* We want to pause/continue resync, tell peer. */ | |
1874 | if (ns.conn >= C_CONNECTED && | |
1875 | ((os.aftr_isp != ns.aftr_isp) || | |
1876 | (os.user_isp != ns.user_isp))) | |
44a4d551 | 1877 | drbd_send_state(peer_device, ns); |
b8907339 PR |
1878 | |
1879 | /* In case one of the isp bits got set, suspend other devices. */ | |
1880 | if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) && | |
1881 | (ns.aftr_isp || ns.peer_isp || ns.user_isp)) | |
b30ab791 | 1882 | suspend_other_sg(device); |
b8907339 PR |
1883 | |
1884 | /* Make sure the peer gets informed about eventual state | |
1885 | changes (ISP bits) while we were in WFReportParams. */ | |
1886 | if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED) | |
44a4d551 | 1887 | drbd_send_state(peer_device, ns); |
b8907339 PR |
1888 | |
1889 | if (os.conn != C_AHEAD && ns.conn == C_AHEAD) | |
44a4d551 | 1890 | drbd_send_state(peer_device, ns); |
b8907339 PR |
1891 | |
1892 | /* We are in the progress to start a full sync... */ | |
1893 | if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || | |
1894 | (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S)) | |
1895 | /* no other bitmap changes expected during this phase */ | |
b30ab791 | 1896 | drbd_queue_bitmap_io(device, |
b8907339 | 1897 | &drbd_bmio_set_n_write, &abw_start_sync, |
8164dd6c AG |
1898 | "set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED, |
1899 | peer_device); | |
b8907339 | 1900 | |
b8907339 PR |
1901 | /* first half of local IO error, failure to attach, |
1902 | * or administrative detach */ | |
1903 | if (os.disk != D_FAILED && ns.disk == D_FAILED) { | |
32db80f6 PR |
1904 | enum drbd_io_error_p eh = EP_PASS_ON; |
1905 | int was_io_error = 0; | |
28bc3b8c | 1906 | /* corresponding get_ldev was in _drbd_set_state, to serialize |
32db80f6 PR |
1907 | * our cleanup here with the transition to D_DISKLESS. |
1908 | * But is is still not save to dreference ldev here, since | |
1909 | * we might come from an failed Attach before ldev was set. */ | |
b30ab791 | 1910 | if (device->ldev) { |
32db80f6 | 1911 | rcu_read_lock(); |
b30ab791 | 1912 | eh = rcu_dereference(device->ldev->disk_conf)->on_io_error; |
32db80f6 PR |
1913 | rcu_read_unlock(); |
1914 | ||
b30ab791 | 1915 | was_io_error = test_and_clear_bit(WAS_IO_ERROR, &device->flags); |
32db80f6 | 1916 | |
dc99562a LE |
1917 | /* Intentionally call this handler first, before drbd_send_state(). |
1918 | * See: 2932204 drbd: call local-io-error handler early | |
1919 | * People may chose to hard-reset the box from this handler. | |
1920 | * It is useful if this looks like a "regular node crash". */ | |
6f1a6563 | 1921 | if (was_io_error && eh == EP_CALL_HELPER) |
b30ab791 | 1922 | drbd_khelper(device, "local-io-error"); |
6f1a6563 | 1923 | |
0c849666 LE |
1924 | /* Immediately allow completion of all application IO, |
1925 | * that waits for completion from the local disk, | |
1926 | * if this was a force-detach due to disk_timeout | |
1927 | * or administrator request (drbdsetup detach --force). | |
1928 | * Do NOT abort otherwise. | |
1929 | * Aborting local requests may cause serious problems, | |
1930 | * if requests are completed to upper layers already, | |
1931 | * and then later the already submitted local bio completes. | |
1932 | * This can cause DMA into former bio pages that meanwhile | |
1933 | * have been re-used for other things. | |
1934 | * So aborting local requests may cause crashes, | |
1935 | * or even worse, silent data corruption. | |
1936 | */ | |
b30ab791 AG |
1937 | if (test_and_clear_bit(FORCE_DETACH, &device->flags)) |
1938 | tl_abort_disk_io(device); | |
32db80f6 PR |
1939 | |
1940 | /* current state still has to be D_FAILED, | |
1941 | * there is only one way out: to D_DISKLESS, | |
1942 | * and that may only happen after our put_ldev below. */ | |
b30ab791 | 1943 | if (device->state.disk != D_FAILED) |
d0180171 | 1944 | drbd_err(device, |
32db80f6 | 1945 | "ASSERT FAILED: disk is %s during detach\n", |
b30ab791 | 1946 | drbd_disk_str(device->state.disk)); |
32db80f6 PR |
1947 | |
1948 | if (ns.conn >= C_CONNECTED) | |
44a4d551 | 1949 | drbd_send_state(peer_device, ns); |
32db80f6 | 1950 | |
b30ab791 | 1951 | drbd_rs_cancel_all(device); |
32db80f6 PR |
1952 | |
1953 | /* In case we want to get something to stable storage still, | |
1954 | * this may be the last chance. | |
1955 | * Following put_ldev may transition to D_DISKLESS. */ | |
b30ab791 | 1956 | drbd_md_sync(device); |
32db80f6 | 1957 | } |
b30ab791 | 1958 | put_ldev(device); |
b8907339 PR |
1959 | } |
1960 | ||
b30ab791 AG |
1961 | /* second half of local IO error, failure to attach, |
1962 | * or administrative detach, | |
1963 | * after local_cnt references have reached zero again */ | |
1964 | if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) { | |
1965 | /* We must still be diskless, | |
1966 | * re-attach has to be serialized with this! */ | |
1967 | if (device->state.disk != D_DISKLESS) | |
d0180171 AG |
1968 | drbd_err(device, |
1969 | "ASSERT FAILED: disk is %s while going diskless\n", | |
1970 | drbd_disk_str(device->state.disk)); | |
b8907339 | 1971 | |
6ab9b1b6 | 1972 | if (ns.conn >= C_CONNECTED) |
44a4d551 | 1973 | drbd_send_state(peer_device, ns); |
b8907339 PR |
1974 | /* corresponding get_ldev in __drbd_set_state |
1975 | * this may finally trigger drbd_ldev_destroy. */ | |
b30ab791 | 1976 | put_ldev(device); |
b8907339 PR |
1977 | } |
1978 | ||
1979 | /* Notify peer that I had a local IO error, and did not detached.. */ | |
6ab9b1b6 | 1980 | if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED) |
44a4d551 | 1981 | drbd_send_state(peer_device, ns); |
b8907339 PR |
1982 | |
1983 | /* Disks got bigger while they were detached */ | |
1984 | if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING && | |
b30ab791 | 1985 | test_and_clear_bit(RESYNC_AFTER_NEG, &device->flags)) { |
b8907339 | 1986 | if (ns.conn == C_CONNECTED) |
b30ab791 | 1987 | resync_after_online_grow(device); |
b8907339 PR |
1988 | } |
1989 | ||
1990 | /* A resync finished or aborted, wake paused devices... */ | |
1991 | if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) || | |
1992 | (os.peer_isp && !ns.peer_isp) || | |
1993 | (os.user_isp && !ns.user_isp)) | |
b30ab791 | 1994 | resume_next_sg(device); |
b8907339 PR |
1995 | |
1996 | /* sync target done with resync. Explicitly notify peer, even though | |
1997 | * it should (at least for non-empty resyncs) already know itself. */ | |
1998 | if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED) | |
44a4d551 | 1999 | drbd_send_state(peer_device, ns); |
b8907339 | 2000 | |
58ffa580 LE |
2001 | /* Verify finished, or reached stop sector. Peer did not know about |
2002 | * the stop sector, and we may even have changed the stop sector during | |
2003 | * verify to interrupt/stop early. Send the new state. */ | |
2004 | if (os.conn == C_VERIFY_S && ns.conn == C_CONNECTED | |
b30ab791 | 2005 | && verify_can_do_stop_sector(device)) |
44a4d551 | 2006 | drbd_send_state(peer_device, ns); |
58ffa580 | 2007 | |
b8907339 PR |
2008 | /* This triggers bitmap writeout of potentially still unwritten pages |
2009 | * if the resync finished cleanly, or aborted because of peer disk | |
be115b69 LE |
2010 | * failure, or on transition from resync back to AHEAD/BEHIND. |
2011 | * | |
2012 | * Connection loss is handled in drbd_disconnected() by the receiver. | |
2013 | * | |
b8907339 PR |
2014 | * For resync aborted because of local disk failure, we cannot do |
2015 | * any bitmap writeout anymore. | |
be115b69 | 2016 | * |
b8907339 PR |
2017 | * No harm done if some bits change during this phase. |
2018 | */ | |
be115b69 LE |
2019 | if ((os.conn > C_CONNECTED && os.conn < C_AHEAD) && |
2020 | (ns.conn == C_CONNECTED || ns.conn >= C_AHEAD) && get_ldev(device)) { | |
b30ab791 | 2021 | drbd_queue_bitmap_io(device, &drbd_bm_write_copy_pages, NULL, |
8164dd6c AG |
2022 | "write from resync_finished", BM_LOCKED_CHANGE_ALLOWED, |
2023 | peer_device); | |
b30ab791 | 2024 | put_ldev(device); |
b8907339 PR |
2025 | } |
2026 | ||
2027 | if (ns.disk == D_DISKLESS && | |
2028 | ns.conn == C_STANDALONE && | |
2029 | ns.role == R_SECONDARY) { | |
2030 | if (os.aftr_isp != ns.aftr_isp) | |
b30ab791 | 2031 | resume_next_sg(device); |
b8907339 PR |
2032 | } |
2033 | ||
b30ab791 | 2034 | drbd_md_sync(device); |
b8907339 PR |
2035 | } |
2036 | ||
bbeb641c | 2037 | struct after_conn_state_chg_work { |
4c007603 | 2038 | struct drbd_work w; |
bbeb641c | 2039 | enum drbd_conns oc; |
8c7e16c3 | 2040 | union drbd_state ns_min; |
b30ab791 | 2041 | union drbd_state ns_max; /* new, max state, over all devices */ |
bbeb641c | 2042 | enum chg_state_flags flags; |
84b8c06b | 2043 | struct drbd_connection *connection; |
a2972846 | 2044 | struct drbd_state_change *state_change; |
bbeb641c PR |
2045 | }; |
2046 | ||
99920dc5 | 2047 | static int w_after_conn_state_ch(struct drbd_work *w, int unused) |
bbeb641c PR |
2048 | { |
2049 | struct after_conn_state_chg_work *acscw = | |
4c007603 | 2050 | container_of(w, struct after_conn_state_chg_work, w); |
84b8c06b | 2051 | struct drbd_connection *connection = acscw->connection; |
bbeb641c | 2052 | enum drbd_conns oc = acscw->oc; |
5f082f98 | 2053 | union drbd_state ns_max = acscw->ns_max; |
c06ece6b | 2054 | struct drbd_peer_device *peer_device; |
a6d00c8e | 2055 | int vnr; |
bbeb641c | 2056 | |
a2972846 AG |
2057 | broadcast_state_change(acscw->state_change); |
2058 | forget_state_change(acscw->state_change); | |
bbeb641c PR |
2059 | kfree(acscw); |
2060 | ||
b8907339 | 2061 | /* Upon network configuration, we need to start the receiver */ |
5f082f98 | 2062 | if (oc == C_STANDALONE && ns_max.conn == C_UNCONNECTED) |
bde89a9e | 2063 | drbd_thread_start(&connection->receiver); |
b8907339 | 2064 | |
f3dfa40a LE |
2065 | if (oc == C_DISCONNECTING && ns_max.conn == C_STANDALONE) { |
2066 | struct net_conf *old_conf; | |
2067 | ||
a2972846 AG |
2068 | mutex_lock(¬ification_mutex); |
2069 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) | |
2070 | notify_peer_device_state(NULL, 0, peer_device, NULL, | |
2071 | NOTIFY_DESTROY | NOTIFY_CONTINUES); | |
2072 | notify_connection_state(NULL, 0, connection, NULL, NOTIFY_DESTROY); | |
2073 | mutex_unlock(¬ification_mutex); | |
2074 | ||
0500813f | 2075 | mutex_lock(&connection->resource->conf_update); |
bde89a9e AG |
2076 | old_conf = connection->net_conf; |
2077 | connection->my_addr_len = 0; | |
2078 | connection->peer_addr_len = 0; | |
ccdd6a93 | 2079 | RCU_INIT_POINTER(connection->net_conf, NULL); |
bde89a9e | 2080 | conn_free_crypto(connection); |
0500813f | 2081 | mutex_unlock(&connection->resource->conf_update); |
f3dfa40a | 2082 | |
a77b2109 | 2083 | kvfree_rcu_mightsleep(old_conf); |
f3dfa40a LE |
2084 | } |
2085 | ||
a6d00c8e PR |
2086 | if (ns_max.susp_fen) { |
2087 | /* case1: The outdate peer handler is successful: */ | |
2088 | if (ns_max.pdsk <= D_OUTDATED) { | |
695d08fa | 2089 | rcu_read_lock(); |
c06ece6b AG |
2090 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2091 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2092 | if (test_bit(NEW_CUR_UUID, &device->flags)) { |
2093 | drbd_uuid_new_current(device); | |
2094 | clear_bit(NEW_CUR_UUID, &device->flags); | |
a6d00c8e PR |
2095 | } |
2096 | } | |
695d08fa | 2097 | rcu_read_unlock(); |
0500813f | 2098 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
2099 | _tl_restart(connection, CONNECTION_LOST_WHILE_PENDING); |
2100 | _conn_request_state(connection, | |
8a0bab2a PR |
2101 | (union drbd_state) { { .susp_fen = 1 } }, |
2102 | (union drbd_state) { { .susp_fen = 0 } }, | |
2103 | CS_VERBOSE); | |
0500813f | 2104 | spin_unlock_irq(&connection->resource->req_lock); |
a6d00c8e | 2105 | } |
a6d00c8e | 2106 | } |
bde89a9e | 2107 | conn_md_sync(connection); |
792c3fdd | 2108 | kref_put(&connection->kref, drbd_destroy_connection); |
19fffd7b | 2109 | |
99920dc5 | 2110 | return 0; |
bbeb641c PR |
2111 | } |
2112 | ||
8ce953aa | 2113 | static void conn_old_common_state(struct drbd_connection *connection, union drbd_state *pcs, enum chg_state_flags *pf) |
88ef594e | 2114 | { |
435693e8 | 2115 | enum chg_state_flags flags = ~0; |
c06ece6b | 2116 | struct drbd_peer_device *peer_device; |
435693e8 | 2117 | int vnr, first_vol = 1; |
e0e16653 PR |
2118 | union drbd_dev_state os, cs = { |
2119 | { .role = R_SECONDARY, | |
2120 | .peer = R_UNKNOWN, | |
bde89a9e | 2121 | .conn = connection->cstate, |
e0e16653 PR |
2122 | .disk = D_DISKLESS, |
2123 | .pdsk = D_UNKNOWN, | |
2124 | } }; | |
88ef594e | 2125 | |
695d08fa | 2126 | rcu_read_lock(); |
c06ece6b AG |
2127 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2128 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 2129 | os = device->state; |
88ef594e | 2130 | |
435693e8 PR |
2131 | if (first_vol) { |
2132 | cs = os; | |
2133 | first_vol = 0; | |
2134 | continue; | |
2135 | } | |
2136 | ||
2137 | if (cs.role != os.role) | |
2138 | flags &= ~CS_DC_ROLE; | |
2139 | ||
2140 | if (cs.peer != os.peer) | |
2141 | flags &= ~CS_DC_PEER; | |
2142 | ||
2143 | if (cs.conn != os.conn) | |
2144 | flags &= ~CS_DC_CONN; | |
88ef594e | 2145 | |
435693e8 PR |
2146 | if (cs.disk != os.disk) |
2147 | flags &= ~CS_DC_DISK; | |
88ef594e | 2148 | |
435693e8 PR |
2149 | if (cs.pdsk != os.pdsk) |
2150 | flags &= ~CS_DC_PDSK; | |
2151 | } | |
695d08fa | 2152 | rcu_read_unlock(); |
435693e8 PR |
2153 | |
2154 | *pf |= CS_DC_MASK; | |
2155 | *pf &= flags; | |
da9fbc27 | 2156 | (*pcs).i = cs.i; |
88ef594e | 2157 | } |
bbeb641c | 2158 | |
bd0c824a | 2159 | static enum drbd_state_rv |
bde89a9e | 2160 | conn_is_valid_transition(struct drbd_connection *connection, union drbd_state mask, union drbd_state val, |
88ef594e | 2161 | enum chg_state_flags flags) |
bbeb641c | 2162 | { |
bd0c824a | 2163 | enum drbd_state_rv rv = SS_SUCCESS; |
bbeb641c | 2164 | union drbd_state ns, os; |
c06ece6b | 2165 | struct drbd_peer_device *peer_device; |
bd0c824a | 2166 | int vnr; |
bbeb641c | 2167 | |
695d08fa | 2168 | rcu_read_lock(); |
c06ece6b AG |
2169 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2170 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 2171 | os = drbd_read_state(device); |
d7fe69c6 | 2172 | ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL); |
bd0c824a | 2173 | |
778bcf2e PR |
2174 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
2175 | ns.disk = os.disk; | |
2176 | ||
bd0c824a PR |
2177 | if (ns.i == os.i) |
2178 | continue; | |
bbeb641c | 2179 | |
bd0c824a | 2180 | rv = is_valid_transition(os, ns); |
bd0c824a | 2181 | |
c06ece6b | 2182 | if (rv >= SS_SUCCESS && !(flags & CS_HARD)) { |
b30ab791 | 2183 | rv = is_valid_state(device, ns); |
bd0c824a | 2184 | if (rv < SS_SUCCESS) { |
b30ab791 | 2185 | if (is_valid_state(device, os) == rv) |
bde89a9e | 2186 | rv = is_valid_soft_transition(os, ns, connection); |
bd0c824a | 2187 | } else |
bde89a9e | 2188 | rv = is_valid_soft_transition(os, ns, connection); |
bd0c824a | 2189 | } |
c06ece6b AG |
2190 | |
2191 | if (rv < SS_SUCCESS) { | |
2192 | if (flags & CS_VERBOSE) | |
2193 | print_st_err(device, os, ns, rv); | |
bd0c824a | 2194 | break; |
c06ece6b | 2195 | } |
bbeb641c | 2196 | } |
695d08fa | 2197 | rcu_read_unlock(); |
bbeb641c | 2198 | |
bd0c824a | 2199 | return rv; |
bbeb641c PR |
2200 | } |
2201 | ||
8ce953aa | 2202 | static void |
bde89a9e | 2203 | conn_set_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val, |
8c7e16c3 | 2204 | union drbd_state *pns_min, union drbd_state *pns_max, enum chg_state_flags flags) |
bbeb641c | 2205 | { |
f132f554 | 2206 | union drbd_state ns, os, ns_max = { }; |
8c7e16c3 PR |
2207 | union drbd_state ns_min = { |
2208 | { .role = R_MASK, | |
2209 | .peer = R_MASK, | |
e0e16653 | 2210 | .conn = val.conn, |
8c7e16c3 PR |
2211 | .disk = D_MASK, |
2212 | .pdsk = D_MASK | |
2213 | } }; | |
c06ece6b | 2214 | struct drbd_peer_device *peer_device; |
bbeb641c | 2215 | enum drbd_state_rv rv; |
f132f554 | 2216 | int vnr, number_of_volumes = 0; |
bbeb641c | 2217 | |
07be15b1 LE |
2218 | if (mask.conn == C_MASK) { |
2219 | /* remember last connect time so request_timer_fn() won't | |
2220 | * kill newly established sessions while we are still trying to thaw | |
2221 | * previously frozen IO */ | |
bde89a9e AG |
2222 | if (connection->cstate != C_WF_REPORT_PARAMS && val.conn == C_WF_REPORT_PARAMS) |
2223 | connection->last_reconnect_jif = jiffies; | |
07be15b1 | 2224 | |
bde89a9e | 2225 | connection->cstate = val.conn; |
07be15b1 | 2226 | } |
bd0c824a | 2227 | |
695d08fa | 2228 | rcu_read_lock(); |
c06ece6b AG |
2229 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2230 | struct drbd_device *device = peer_device->device; | |
f132f554 | 2231 | number_of_volumes++; |
b30ab791 | 2232 | os = drbd_read_state(device); |
bd0c824a | 2233 | ns = apply_mask_val(os, mask, val); |
d7fe69c6 | 2234 | ns = sanitize_state(device, os, ns, NULL); |
bbeb641c | 2235 | |
778bcf2e PR |
2236 | if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED) |
2237 | ns.disk = os.disk; | |
2238 | ||
28bc3b8c | 2239 | rv = _drbd_set_state(device, ns, flags, NULL); |
7e5fec31 | 2240 | BUG_ON(rv < SS_SUCCESS); |
b30ab791 | 2241 | ns.i = device->state.i; |
8c7e16c3 PR |
2242 | ns_max.role = max_role(ns.role, ns_max.role); |
2243 | ns_max.peer = max_role(ns.peer, ns_max.peer); | |
2244 | ns_max.conn = max_t(enum drbd_conns, ns.conn, ns_max.conn); | |
2245 | ns_max.disk = max_t(enum drbd_disk_state, ns.disk, ns_max.disk); | |
2246 | ns_max.pdsk = max_t(enum drbd_disk_state, ns.pdsk, ns_max.pdsk); | |
2247 | ||
2248 | ns_min.role = min_role(ns.role, ns_min.role); | |
2249 | ns_min.peer = min_role(ns.peer, ns_min.peer); | |
2250 | ns_min.conn = min_t(enum drbd_conns, ns.conn, ns_min.conn); | |
2251 | ns_min.disk = min_t(enum drbd_disk_state, ns.disk, ns_min.disk); | |
2252 | ns_min.pdsk = min_t(enum drbd_disk_state, ns.pdsk, ns_min.pdsk); | |
bd0c824a | 2253 | } |
695d08fa | 2254 | rcu_read_unlock(); |
bbeb641c | 2255 | |
f132f554 PR |
2256 | if (number_of_volumes == 0) { |
2257 | ns_min = ns_max = (union drbd_state) { { | |
2258 | .role = R_SECONDARY, | |
2259 | .peer = R_UNKNOWN, | |
2260 | .conn = val.conn, | |
2261 | .disk = D_DISKLESS, | |
2262 | .pdsk = D_UNKNOWN | |
2263 | } }; | |
2264 | } | |
2265 | ||
6bbf53ca AG |
2266 | ns_min.susp = ns_max.susp = connection->resource->susp; |
2267 | ns_min.susp_nod = ns_max.susp_nod = connection->resource->susp_nod; | |
2268 | ns_min.susp_fen = ns_max.susp_fen = connection->resource->susp_fen; | |
8c7e16c3 PR |
2269 | |
2270 | *pns_min = ns_min; | |
2271 | *pns_max = ns_max; | |
bbeb641c PR |
2272 | } |
2273 | ||
df24aa45 | 2274 | static enum drbd_state_rv |
bde89a9e | 2275 | _conn_rq_cond(struct drbd_connection *connection, union drbd_state mask, union drbd_state val) |
df24aa45 | 2276 | { |
88ea685d | 2277 | enum drbd_state_rv err, rv = SS_UNKNOWN_ERROR; /* continue waiting */; |
df24aa45 | 2278 | |
bde89a9e | 2279 | if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &connection->flags)) |
88ea685d | 2280 | rv = SS_CW_SUCCESS; |
df24aa45 | 2281 | |
bde89a9e | 2282 | if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &connection->flags)) |
88ea685d | 2283 | rv = SS_CW_FAILED_BY_PEER; |
df24aa45 | 2284 | |
88ea685d PR |
2285 | err = conn_is_valid_transition(connection, mask, val, 0); |
2286 | if (err == SS_SUCCESS && connection->cstate == C_WF_REPORT_PARAMS) | |
2287 | return rv; | |
df24aa45 | 2288 | |
88ea685d | 2289 | return err; |
df24aa45 PR |
2290 | } |
2291 | ||
bbeb641c | 2292 | enum drbd_state_rv |
bde89a9e | 2293 | _conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val, |
bbeb641c PR |
2294 | enum chg_state_flags flags) |
2295 | { | |
2296 | enum drbd_state_rv rv = SS_SUCCESS; | |
bbeb641c | 2297 | struct after_conn_state_chg_work *acscw; |
bde89a9e | 2298 | enum drbd_conns oc = connection->cstate; |
8c7e16c3 | 2299 | union drbd_state ns_max, ns_min, os; |
c02abda2 | 2300 | bool have_mutex = false; |
a2972846 | 2301 | struct drbd_state_change *state_change; |
bbeb641c | 2302 | |
07fc9619 PR |
2303 | if (mask.conn) { |
2304 | rv = is_valid_conn_transition(oc, val.conn); | |
2305 | if (rv < SS_SUCCESS) | |
2306 | goto abort; | |
2307 | } | |
bbeb641c | 2308 | |
bde89a9e | 2309 | rv = conn_is_valid_transition(connection, mask, val, flags); |
bbeb641c PR |
2310 | if (rv < SS_SUCCESS) |
2311 | goto abort; | |
2312 | ||
df24aa45 PR |
2313 | if (oc == C_WF_REPORT_PARAMS && val.conn == C_DISCONNECTING && |
2314 | !(flags & (CS_LOCAL_ONLY | CS_HARD))) { | |
c02abda2 LE |
2315 | |
2316 | /* This will be a cluster-wide state change. | |
2317 | * Need to give up the spinlock, grab the mutex, | |
2318 | * then send the state change request, ... */ | |
0500813f | 2319 | spin_unlock_irq(&connection->resource->req_lock); |
bde89a9e | 2320 | mutex_lock(&connection->cstate_mutex); |
c02abda2 LE |
2321 | have_mutex = true; |
2322 | ||
bde89a9e AG |
2323 | set_bit(CONN_WD_ST_CHG_REQ, &connection->flags); |
2324 | if (conn_send_state_req(connection, mask, val)) { | |
c02abda2 | 2325 | /* sending failed. */ |
bde89a9e | 2326 | clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags); |
c02abda2 LE |
2327 | rv = SS_CW_FAILED_BY_PEER; |
2328 | /* need to re-aquire the spin lock, though */ | |
2329 | goto abort_unlocked; | |
2330 | } | |
2331 | ||
2332 | if (val.conn == C_DISCONNECTING) | |
bde89a9e | 2333 | set_bit(DISCONNECT_SENT, &connection->flags); |
c02abda2 LE |
2334 | |
2335 | /* ... and re-aquire the spinlock. | |
2336 | * If _conn_rq_cond() returned >= SS_SUCCESS, we must call | |
2337 | * conn_set_state() within the same spinlock. */ | |
0500813f | 2338 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
2339 | wait_event_lock_irq(connection->ping_wait, |
2340 | (rv = _conn_rq_cond(connection, mask, val)), | |
0500813f | 2341 | connection->resource->req_lock); |
bde89a9e | 2342 | clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags); |
df24aa45 PR |
2343 | if (rv < SS_SUCCESS) |
2344 | goto abort; | |
2345 | } | |
2346 | ||
a2972846 | 2347 | state_change = remember_old_state(connection->resource, GFP_ATOMIC); |
bde89a9e | 2348 | conn_old_common_state(connection, &os, &flags); |
706cb24c | 2349 | flags |= CS_DC_SUSP; |
bde89a9e AG |
2350 | conn_set_state(connection, mask, val, &ns_min, &ns_max, flags); |
2351 | conn_pr_state_change(connection, os, ns_max, flags); | |
a2972846 | 2352 | remember_new_state(state_change); |
bbeb641c PR |
2353 | |
2354 | acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC); | |
2355 | if (acscw) { | |
435693e8 | 2356 | acscw->oc = os.conn; |
8c7e16c3 | 2357 | acscw->ns_min = ns_min; |
5f082f98 | 2358 | acscw->ns_max = ns_max; |
bbeb641c | 2359 | acscw->flags = flags; |
4c007603 | 2360 | acscw->w.cb = w_after_conn_state_ch; |
bde89a9e | 2361 | kref_get(&connection->kref); |
84b8c06b | 2362 | acscw->connection = connection; |
a2972846 | 2363 | acscw->state_change = state_change; |
4c007603 | 2364 | drbd_queue_work(&connection->sender_work, &acscw->w); |
bbeb641c | 2365 | } else { |
1ec861eb | 2366 | drbd_err(connection, "Could not kmalloc an acscw\n"); |
b8907339 | 2367 | } |
bbeb641c | 2368 | |
a01842eb | 2369 | abort: |
c02abda2 LE |
2370 | if (have_mutex) { |
2371 | /* mutex_unlock() "... must not be used in interrupt context.", | |
2372 | * so give up the spinlock, then re-aquire it */ | |
0500813f | 2373 | spin_unlock_irq(&connection->resource->req_lock); |
c02abda2 | 2374 | abort_unlocked: |
bde89a9e | 2375 | mutex_unlock(&connection->cstate_mutex); |
0500813f | 2376 | spin_lock_irq(&connection->resource->req_lock); |
c02abda2 LE |
2377 | } |
2378 | if (rv < SS_SUCCESS && flags & CS_VERBOSE) { | |
1ec861eb AG |
2379 | drbd_err(connection, "State change failed: %s\n", drbd_set_st_err_str(rv)); |
2380 | drbd_err(connection, " mask = 0x%x val = 0x%x\n", mask.i, val.i); | |
2381 | drbd_err(connection, " old_conn:%s wanted_conn:%s\n", drbd_conn_str(oc), drbd_conn_str(val.conn)); | |
a01842eb | 2382 | } |
bbeb641c PR |
2383 | return rv; |
2384 | } | |
2385 | ||
2386 | enum drbd_state_rv | |
bde89a9e | 2387 | conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val, |
bbeb641c PR |
2388 | enum chg_state_flags flags) |
2389 | { | |
2390 | enum drbd_state_rv rv; | |
2391 | ||
0500813f | 2392 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e | 2393 | rv = _conn_request_state(connection, mask, val, flags); |
0500813f | 2394 | spin_unlock_irq(&connection->resource->req_lock); |
bbeb641c PR |
2395 | |
2396 | return rv; | |
b8907339 | 2397 | } |