Commit | Line | Data |
---|---|---|
b411b363 PR |
1 | /* |
2 | drbd_actlog.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2003-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 2003-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
26 | #include <linux/slab.h> | |
7ad651b5 | 27 | #include <linux/crc32c.h> |
b411b363 | 28 | #include <linux/drbd.h> |
7ad651b5 LE |
29 | #include <linux/drbd_limits.h> |
30 | #include <linux/dynamic_debug.h> | |
b411b363 | 31 | #include "drbd_int.h" |
b411b363 PR |
32 | #include "drbd_wrappers.h" |
33 | ||
85f103d8 LE |
34 | |
35 | enum al_transaction_types { | |
36 | AL_TR_UPDATE = 0, | |
37 | AL_TR_INITIALIZED = 0xffff | |
38 | }; | |
7ad651b5 LE |
39 | /* all fields on disc in big endian */ |
40 | struct __packed al_transaction_on_disk { | |
41 | /* don't we all like magic */ | |
42 | __be32 magic; | |
43 | ||
44 | /* to identify the most recent transaction block | |
45 | * in the on disk ring buffer */ | |
46 | __be32 tr_number; | |
47 | ||
48 | /* checksum on the full 4k block, with this field set to 0. */ | |
49 | __be32 crc32c; | |
50 | ||
51 | /* type of transaction, special transaction types like: | |
85f103d8 LE |
52 | * purge-all, set-all-idle, set-all-active, ... to-be-defined |
53 | * see also enum al_transaction_types */ | |
7ad651b5 LE |
54 | __be16 transaction_type; |
55 | ||
56 | /* we currently allow only a few thousand extents, | |
57 | * so 16bit will be enough for the slot number. */ | |
58 | ||
59 | /* how many updates in this transaction */ | |
60 | __be16 n_updates; | |
61 | ||
62 | /* maximum slot number, "al-extents" in drbd.conf speak. | |
63 | * Having this in each transaction should make reconfiguration | |
64 | * of that parameter easier. */ | |
65 | __be16 context_size; | |
66 | ||
67 | /* slot number the context starts with */ | |
68 | __be16 context_start_slot_nr; | |
69 | ||
70 | /* Some reserved bytes. Expected usage is a 64bit counter of | |
71 | * sectors-written since device creation, and other data generation tag | |
72 | * supporting usage */ | |
73 | __be32 __reserved[4]; | |
74 | ||
75 | /* --- 36 byte used --- */ | |
76 | ||
77 | /* Reserve space for up to AL_UPDATES_PER_TRANSACTION changes | |
78 | * in one transaction, then use the remaining byte in the 4k block for | |
79 | * context information. "Flexible" number of updates per transaction | |
80 | * does not help, as we have to account for the case when all update | |
81 | * slots are used anyways, so it would only complicate code without | |
82 | * additional benefit. | |
83 | */ | |
84 | __be16 update_slot_nr[AL_UPDATES_PER_TRANSACTION]; | |
85 | ||
86 | /* but the extent number is 32bit, which at an extent size of 4 MiB | |
87 | * allows to cover device sizes of up to 2**54 Byte (16 PiB) */ | |
88 | __be32 update_extent_nr[AL_UPDATES_PER_TRANSACTION]; | |
89 | ||
90 | /* --- 420 bytes used (36 + 64*6) --- */ | |
91 | ||
92 | /* 4096 - 420 = 3676 = 919 * 4 */ | |
93 | __be32 context[AL_CONTEXT_PER_TRANSACTION]; | |
b411b363 PR |
94 | }; |
95 | ||
96 | struct update_odbm_work { | |
97 | struct drbd_work w; | |
98 | unsigned int enr; | |
99 | }; | |
100 | ||
101 | struct update_al_work { | |
102 | struct drbd_work w; | |
b411b363 | 103 | struct completion event; |
7ad651b5 | 104 | int err; |
b411b363 PR |
105 | }; |
106 | ||
b411b363 | 107 | |
b30ab791 | 108 | void *drbd_md_get_buffer(struct drbd_device *device) |
cdfda633 PR |
109 | { |
110 | int r; | |
111 | ||
b30ab791 AG |
112 | wait_event(device->misc_wait, |
113 | (r = atomic_cmpxchg(&device->md_io_in_use, 0, 1)) == 0 || | |
114 | device->state.disk <= D_FAILED); | |
cdfda633 | 115 | |
b30ab791 | 116 | return r ? NULL : page_address(device->md_io_page); |
cdfda633 PR |
117 | } |
118 | ||
b30ab791 | 119 | void drbd_md_put_buffer(struct drbd_device *device) |
cdfda633 | 120 | { |
b30ab791 AG |
121 | if (atomic_dec_and_test(&device->md_io_in_use)) |
122 | wake_up(&device->misc_wait); | |
cdfda633 PR |
123 | } |
124 | ||
b30ab791 | 125 | void wait_until_done_or_force_detached(struct drbd_device *device, struct drbd_backing_dev *bdev, |
32db80f6 | 126 | unsigned int *done) |
cdfda633 | 127 | { |
32db80f6 PR |
128 | long dt; |
129 | ||
130 | rcu_read_lock(); | |
131 | dt = rcu_dereference(bdev->disk_conf)->disk_timeout; | |
132 | rcu_read_unlock(); | |
133 | dt = dt * HZ / 10; | |
134 | if (dt == 0) | |
135 | dt = MAX_SCHEDULE_TIMEOUT; | |
136 | ||
b30ab791 AG |
137 | dt = wait_event_timeout(device->misc_wait, |
138 | *done || test_bit(FORCE_DETACH, &device->flags), dt); | |
e34b677d | 139 | if (dt == 0) { |
d0180171 | 140 | drbd_err(device, "meta-data IO operation timed out\n"); |
b30ab791 | 141 | drbd_chk_io_error(device, 1, DRBD_FORCE_DETACH); |
e34b677d | 142 | } |
cdfda633 PR |
143 | } |
144 | ||
b30ab791 | 145 | static int _drbd_md_sync_page_io(struct drbd_device *device, |
b411b363 PR |
146 | struct drbd_backing_dev *bdev, |
147 | struct page *page, sector_t sector, | |
148 | int rw, int size) | |
149 | { | |
150 | struct bio *bio; | |
ac29f403 | 151 | int err; |
b411b363 | 152 | |
b30ab791 AG |
153 | device->md_io.done = 0; |
154 | device->md_io.error = -ENODEV; | |
b411b363 | 155 | |
b30ab791 | 156 | if ((rw & WRITE) && !test_bit(MD_NO_FUA, &device->flags)) |
86e1e98e | 157 | rw |= REQ_FUA | REQ_FLUSH; |
721a9602 | 158 | rw |= REQ_SYNC; |
b411b363 | 159 | |
da4a75d2 | 160 | bio = bio_alloc_drbd(GFP_NOIO); |
b411b363 | 161 | bio->bi_bdev = bdev->md_bdev; |
4f024f37 | 162 | bio->bi_iter.bi_sector = sector; |
ac29f403 AG |
163 | err = -EIO; |
164 | if (bio_add_page(bio, page, size, 0) != size) | |
b411b363 | 165 | goto out; |
b30ab791 | 166 | bio->bi_private = &device->md_io; |
b411b363 PR |
167 | bio->bi_end_io = drbd_md_io_complete; |
168 | bio->bi_rw = rw; | |
169 | ||
b30ab791 | 170 | if (!(rw & WRITE) && device->state.disk == D_DISKLESS && device->ldev == NULL) |
c04ccaa6 LE |
171 | /* special case, drbd_md_read() during drbd_adm_attach(): no get_ldev */ |
172 | ; | |
b30ab791 | 173 | else if (!get_ldev_if_state(device, D_ATTACHING)) { |
c04ccaa6 | 174 | /* Corresponding put_ldev in drbd_md_io_complete() */ |
d0180171 | 175 | drbd_err(device, "ASSERT FAILED: get_ldev_if_state() == 1 in _drbd_md_sync_page_io()\n"); |
cdfda633 PR |
176 | err = -ENODEV; |
177 | goto out; | |
178 | } | |
179 | ||
180 | bio_get(bio); /* one bio_put() is in the completion handler */ | |
b30ab791 AG |
181 | atomic_inc(&device->md_io_in_use); /* drbd_md_put_buffer() is in the completion handler */ |
182 | if (drbd_insert_fault(device, (rw & WRITE) ? DRBD_FAULT_MD_WR : DRBD_FAULT_MD_RD)) | |
b411b363 PR |
183 | bio_endio(bio, -EIO); |
184 | else | |
185 | submit_bio(rw, bio); | |
b30ab791 | 186 | wait_until_done_or_force_detached(device, bdev, &device->md_io.done); |
ac29f403 | 187 | if (bio_flagged(bio, BIO_UPTODATE)) |
b30ab791 | 188 | err = device->md_io.error; |
b411b363 | 189 | |
b411b363 PR |
190 | out: |
191 | bio_put(bio); | |
ac29f403 | 192 | return err; |
b411b363 PR |
193 | } |
194 | ||
b30ab791 | 195 | int drbd_md_sync_page_io(struct drbd_device *device, struct drbd_backing_dev *bdev, |
b411b363 PR |
196 | sector_t sector, int rw) |
197 | { | |
3fbf4d21 | 198 | int err; |
b30ab791 | 199 | struct page *iop = device->md_io_page; |
b411b363 | 200 | |
0b0ba1ef | 201 | D_ASSERT(device, atomic_read(&device->md_io_in_use) == 1); |
b411b363 PR |
202 | |
203 | BUG_ON(!bdev->md_bdev); | |
204 | ||
d0180171 | 205 | drbd_dbg(device, "meta_data io: %s [%d]:%s(,%llus,%s) %pS\n", |
7ad651b5 | 206 | current->comm, current->pid, __func__, |
c04ccaa6 LE |
207 | (unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ", |
208 | (void*)_RET_IP_ ); | |
b411b363 PR |
209 | |
210 | if (sector < drbd_md_first_sector(bdev) || | |
7ad651b5 | 211 | sector + 7 > drbd_md_last_sector(bdev)) |
d0180171 | 212 | drbd_alert(device, "%s [%d]:%s(,%llus,%s) out of range md access!\n", |
b411b363 PR |
213 | current->comm, current->pid, __func__, |
214 | (unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ"); | |
215 | ||
ae8bf312 | 216 | /* we do all our meta data IO in aligned 4k blocks. */ |
b30ab791 | 217 | err = _drbd_md_sync_page_io(device, bdev, iop, sector, rw, 4096); |
3fbf4d21 | 218 | if (err) { |
d0180171 | 219 | drbd_err(device, "drbd_md_sync_page_io(,%llus,%s) failed with error %d\n", |
935be260 | 220 | (unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ", err); |
b411b363 | 221 | } |
3fbf4d21 | 222 | return err; |
b411b363 PR |
223 | } |
224 | ||
b30ab791 | 225 | static struct bm_extent *find_active_resync_extent(struct drbd_device *device, unsigned int enr) |
b411b363 | 226 | { |
b411b363 | 227 | struct lc_element *tmp; |
b30ab791 | 228 | tmp = lc_find(device->resync, enr/AL_EXT_PER_BM_SECT); |
b411b363 PR |
229 | if (unlikely(tmp != NULL)) { |
230 | struct bm_extent *bm_ext = lc_entry(tmp, struct bm_extent, lce); | |
6c3c4355 LE |
231 | if (test_bit(BME_NO_WRITES, &bm_ext->flags)) |
232 | return bm_ext; | |
b411b363 | 233 | } |
6c3c4355 LE |
234 | return NULL; |
235 | } | |
236 | ||
b30ab791 | 237 | static struct lc_element *_al_get(struct drbd_device *device, unsigned int enr, bool nonblock) |
6c3c4355 LE |
238 | { |
239 | struct lc_element *al_ext; | |
240 | struct bm_extent *bm_ext; | |
241 | int wake; | |
242 | ||
b30ab791 AG |
243 | spin_lock_irq(&device->al_lock); |
244 | bm_ext = find_active_resync_extent(device, enr); | |
6c3c4355 LE |
245 | if (bm_ext) { |
246 | wake = !test_and_set_bit(BME_PRIORITY, &bm_ext->flags); | |
b30ab791 | 247 | spin_unlock_irq(&device->al_lock); |
6c3c4355 | 248 | if (wake) |
b30ab791 | 249 | wake_up(&device->al_wait); |
6c3c4355 LE |
250 | return NULL; |
251 | } | |
252 | if (nonblock) | |
b30ab791 | 253 | al_ext = lc_try_get(device->act_log, enr); |
6c3c4355 | 254 | else |
b30ab791 AG |
255 | al_ext = lc_get(device->act_log, enr); |
256 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
257 | return al_ext; |
258 | } | |
259 | ||
b30ab791 | 260 | bool drbd_al_begin_io_fastpath(struct drbd_device *device, struct drbd_interval *i) |
b411b363 | 261 | { |
7726547e LE |
262 | /* for bios crossing activity log extent boundaries, |
263 | * we may need to activate two extents in one go */ | |
e15766e9 | 264 | unsigned first = i->sector >> (AL_EXTENT_SHIFT-9); |
81a3537a | 265 | unsigned last = i->size == 0 ? first : (i->sector + (i->size >> 9) - 1) >> (AL_EXTENT_SHIFT-9); |
7dc1d67f | 266 | |
0b0ba1ef AG |
267 | D_ASSERT(device, (unsigned)(last - first) <= 1); |
268 | D_ASSERT(device, atomic_read(&device->local_cnt) > 0); | |
b5bc8e08 LE |
269 | |
270 | /* FIXME figure out a fast path for bios crossing AL extent boundaries */ | |
271 | if (first != last) | |
272 | return false; | |
273 | ||
b30ab791 | 274 | return _al_get(device, first, true); |
b5bc8e08 | 275 | } |
56392d2f | 276 | |
a99efafc | 277 | static |
b30ab791 | 278 | bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval *i) |
b5bc8e08 LE |
279 | { |
280 | /* for bios crossing activity log extent boundaries, | |
281 | * we may need to activate two extents in one go */ | |
282 | unsigned first = i->sector >> (AL_EXTENT_SHIFT-9); | |
283 | unsigned last = i->size == 0 ? first : (i->sector + (i->size >> 9) - 1) >> (AL_EXTENT_SHIFT-9); | |
284 | unsigned enr; | |
285 | bool need_transaction = false; | |
b411b363 | 286 | |
0b0ba1ef AG |
287 | D_ASSERT(device, first <= last); |
288 | D_ASSERT(device, atomic_read(&device->local_cnt) > 0); | |
b411b363 | 289 | |
ebfd5d8f LE |
290 | for (enr = first; enr <= last; enr++) { |
291 | struct lc_element *al_ext; | |
b30ab791 AG |
292 | wait_event(device->al_wait, |
293 | (al_ext = _al_get(device, enr, false)) != NULL); | |
ebfd5d8f LE |
294 | if (al_ext->lc_number != enr) |
295 | need_transaction = true; | |
296 | } | |
b5bc8e08 LE |
297 | return need_transaction; |
298 | } | |
299 | ||
b30ab791 | 300 | static int al_write_transaction(struct drbd_device *device, bool delegate); |
b5bc8e08 LE |
301 | |
302 | /* When called through generic_make_request(), we must delegate | |
303 | * activity log I/O to the worker thread: a further request | |
304 | * submitted via generic_make_request() within the same task | |
305 | * would be queued on current->bio_list, and would only start | |
306 | * after this function returns (see generic_make_request()). | |
307 | * | |
308 | * However, if we *are* the worker, we must not delegate to ourselves. | |
309 | */ | |
310 | ||
311 | /* | |
312 | * @delegate: delegate activity log I/O to the worker thread | |
313 | */ | |
b30ab791 | 314 | void drbd_al_begin_io_commit(struct drbd_device *device, bool delegate) |
b5bc8e08 LE |
315 | { |
316 | bool locked = false; | |
ebfd5d8f | 317 | |
a6b32bc3 | 318 | BUG_ON(delegate && current == first_peer_device(device)->connection->worker.task); |
b411b363 | 319 | |
7dc1d67f LE |
320 | /* Serialize multiple transactions. |
321 | * This uses test_and_set_bit, memory barrier is implicit. | |
322 | */ | |
b30ab791 AG |
323 | wait_event(device->al_wait, |
324 | device->act_log->pending_changes == 0 || | |
325 | (locked = lc_try_lock_for_transaction(device->act_log))); | |
7dc1d67f LE |
326 | |
327 | if (locked) { | |
7ad651b5 LE |
328 | /* Double check: it may have been committed by someone else, |
329 | * while we have been waiting for the lock. */ | |
b30ab791 | 330 | if (device->act_log->pending_changes) { |
9a51ab1c PR |
331 | bool write_al_updates; |
332 | ||
333 | rcu_read_lock(); | |
b30ab791 | 334 | write_al_updates = rcu_dereference(device->ldev->disk_conf)->al_updates; |
9a51ab1c PR |
335 | rcu_read_unlock(); |
336 | ||
b5bc8e08 | 337 | if (write_al_updates) |
b30ab791 AG |
338 | al_write_transaction(device, delegate); |
339 | spin_lock_irq(&device->al_lock); | |
7ad651b5 | 340 | /* FIXME |
1b7ab15b | 341 | if (err) |
7ad651b5 LE |
342 | we need an "lc_cancel" here; |
343 | */ | |
b30ab791 AG |
344 | lc_committed(device->act_log); |
345 | spin_unlock_irq(&device->al_lock); | |
7ad651b5 | 346 | } |
b30ab791 AG |
347 | lc_unlock(device->act_log); |
348 | wake_up(&device->al_wait); | |
b411b363 PR |
349 | } |
350 | } | |
351 | ||
b5bc8e08 LE |
352 | /* |
353 | * @delegate: delegate activity log I/O to the worker thread | |
354 | */ | |
b30ab791 | 355 | void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i, bool delegate) |
b5bc8e08 | 356 | { |
a6b32bc3 | 357 | BUG_ON(delegate && current == first_peer_device(device)->connection->worker.task); |
b5bc8e08 | 358 | |
b30ab791 AG |
359 | if (drbd_al_begin_io_prepare(device, i)) |
360 | drbd_al_begin_io_commit(device, delegate); | |
b5bc8e08 LE |
361 | } |
362 | ||
b30ab791 | 363 | int drbd_al_begin_io_nonblock(struct drbd_device *device, struct drbd_interval *i) |
08a1ddab | 364 | { |
b30ab791 | 365 | struct lru_cache *al = device->act_log; |
08a1ddab LE |
366 | /* for bios crossing activity log extent boundaries, |
367 | * we may need to activate two extents in one go */ | |
368 | unsigned first = i->sector >> (AL_EXTENT_SHIFT-9); | |
369 | unsigned last = i->size == 0 ? first : (i->sector + (i->size >> 9) - 1) >> (AL_EXTENT_SHIFT-9); | |
370 | unsigned nr_al_extents; | |
371 | unsigned available_update_slots; | |
372 | unsigned enr; | |
373 | ||
0b0ba1ef | 374 | D_ASSERT(device, first <= last); |
08a1ddab LE |
375 | |
376 | nr_al_extents = 1 + last - first; /* worst case: all touched extends are cold. */ | |
377 | available_update_slots = min(al->nr_elements - al->used, | |
378 | al->max_pending_changes - al->pending_changes); | |
379 | ||
380 | /* We want all necessary updates for a given request within the same transaction | |
381 | * We could first check how many updates are *actually* needed, | |
382 | * and use that instead of the worst-case nr_al_extents */ | |
383 | if (available_update_slots < nr_al_extents) | |
384 | return -EWOULDBLOCK; | |
385 | ||
386 | /* Is resync active in this area? */ | |
387 | for (enr = first; enr <= last; enr++) { | |
388 | struct lc_element *tmp; | |
b30ab791 | 389 | tmp = lc_find(device->resync, enr/AL_EXT_PER_BM_SECT); |
08a1ddab LE |
390 | if (unlikely(tmp != NULL)) { |
391 | struct bm_extent *bm_ext = lc_entry(tmp, struct bm_extent, lce); | |
392 | if (test_bit(BME_NO_WRITES, &bm_ext->flags)) { | |
0b6ef416 | 393 | if (!test_and_set_bit(BME_PRIORITY, &bm_ext->flags)) |
08a1ddab LE |
394 | return -EBUSY; |
395 | return -EWOULDBLOCK; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | /* Checkout the refcounts. | |
401 | * Given that we checked for available elements and update slots above, | |
402 | * this has to be successful. */ | |
403 | for (enr = first; enr <= last; enr++) { | |
404 | struct lc_element *al_ext; | |
b30ab791 | 405 | al_ext = lc_get_cumulative(device->act_log, enr); |
08a1ddab | 406 | if (!al_ext) |
d0180171 | 407 | drbd_info(device, "LOGIC BUG for enr=%u\n", enr); |
08a1ddab LE |
408 | } |
409 | return 0; | |
410 | } | |
411 | ||
b30ab791 | 412 | void drbd_al_complete_io(struct drbd_device *device, struct drbd_interval *i) |
b411b363 | 413 | { |
e15766e9 LE |
414 | /* for bios crossing activity log extent boundaries, |
415 | * we may need to activate two extents in one go */ | |
416 | unsigned first = i->sector >> (AL_EXTENT_SHIFT-9); | |
81a3537a | 417 | unsigned last = i->size == 0 ? first : (i->sector + (i->size >> 9) - 1) >> (AL_EXTENT_SHIFT-9); |
e15766e9 | 418 | unsigned enr; |
b411b363 PR |
419 | struct lc_element *extent; |
420 | unsigned long flags; | |
421 | ||
0b0ba1ef | 422 | D_ASSERT(device, first <= last); |
b30ab791 | 423 | spin_lock_irqsave(&device->al_lock, flags); |
b411b363 | 424 | |
e15766e9 | 425 | for (enr = first; enr <= last; enr++) { |
b30ab791 | 426 | extent = lc_find(device->act_log, enr); |
e15766e9 | 427 | if (!extent) { |
d0180171 | 428 | drbd_err(device, "al_complete_io() called on inactive extent %u\n", enr); |
e15766e9 LE |
429 | continue; |
430 | } | |
b30ab791 | 431 | lc_put(device->act_log, extent); |
b411b363 | 432 | } |
b30ab791 AG |
433 | spin_unlock_irqrestore(&device->al_lock, flags); |
434 | wake_up(&device->al_wait); | |
b411b363 PR |
435 | } |
436 | ||
19f843aa LE |
437 | #if (PAGE_SHIFT + 3) < (AL_EXTENT_SHIFT - BM_BLOCK_SHIFT) |
438 | /* Currently BM_BLOCK_SHIFT, BM_EXT_SHIFT and AL_EXTENT_SHIFT | |
439 | * are still coupled, or assume too much about their relation. | |
440 | * Code below will not work if this is violated. | |
441 | * Will be cleaned up with some followup patch. | |
442 | */ | |
443 | # error FIXME | |
444 | #endif | |
445 | ||
446 | static unsigned int al_extent_to_bm_page(unsigned int al_enr) | |
447 | { | |
448 | return al_enr >> | |
449 | /* bit to page */ | |
450 | ((PAGE_SHIFT + 3) - | |
451 | /* al extent number to bit */ | |
452 | (AL_EXTENT_SHIFT - BM_BLOCK_SHIFT)); | |
453 | } | |
454 | ||
455 | static unsigned int rs_extent_to_bm_page(unsigned int rs_enr) | |
456 | { | |
457 | return rs_enr >> | |
458 | /* bit to page */ | |
459 | ((PAGE_SHIFT + 3) - | |
acb104c3 | 460 | /* resync extent number to bit */ |
19f843aa LE |
461 | (BM_EXT_SHIFT - BM_BLOCK_SHIFT)); |
462 | } | |
463 | ||
b30ab791 | 464 | static sector_t al_tr_number_to_on_disk_sector(struct drbd_device *device) |
ae8bf312 | 465 | { |
b30ab791 AG |
466 | const unsigned int stripes = device->ldev->md.al_stripes; |
467 | const unsigned int stripe_size_4kB = device->ldev->md.al_stripe_size_4k; | |
ae8bf312 LE |
468 | |
469 | /* transaction number, modulo on-disk ring buffer wrap around */ | |
b30ab791 | 470 | unsigned int t = device->al_tr_number % (device->ldev->md.al_size_4k); |
ae8bf312 LE |
471 | |
472 | /* ... to aligned 4k on disk block */ | |
473 | t = ((t % stripes) * stripe_size_4kB) + t/stripes; | |
474 | ||
475 | /* ... to 512 byte sector in activity log */ | |
476 | t *= 8; | |
477 | ||
478 | /* ... plus offset to the on disk position */ | |
b30ab791 | 479 | return device->ldev->md.md_offset + device->ldev->md.al_offset + t; |
ae8bf312 LE |
480 | } |
481 | ||
99920dc5 | 482 | static int |
b30ab791 | 483 | _al_write_transaction(struct drbd_device *device) |
b411b363 | 484 | { |
7ad651b5 LE |
485 | struct al_transaction_on_disk *buffer; |
486 | struct lc_element *e; | |
b411b363 | 487 | sector_t sector; |
7ad651b5 LE |
488 | int i, mx; |
489 | unsigned extent_nr; | |
490 | unsigned crc = 0; | |
1b7ab15b | 491 | int err = 0; |
b411b363 | 492 | |
b30ab791 | 493 | if (!get_ldev(device)) { |
d0180171 | 494 | drbd_err(device, "disk is %s, cannot start al transaction\n", |
b30ab791 | 495 | drbd_disk_str(device->state.disk)); |
1b7ab15b | 496 | return -EIO; |
b411b363 | 497 | } |
b411b363 | 498 | |
6719fb03 | 499 | /* The bitmap write may have failed, causing a state change. */ |
b30ab791 | 500 | if (device->state.disk < D_INCONSISTENT) { |
d0180171 | 501 | drbd_err(device, |
7ad651b5 | 502 | "disk is %s, cannot write al transaction\n", |
b30ab791 AG |
503 | drbd_disk_str(device->state.disk)); |
504 | put_ldev(device); | |
1b7ab15b | 505 | return -EIO; |
6719fb03 LE |
506 | } |
507 | ||
b30ab791 | 508 | buffer = drbd_md_get_buffer(device); /* protects md_io_buffer, al_tr_cycle, ... */ |
cdfda633 | 509 | if (!buffer) { |
d0180171 | 510 | drbd_err(device, "disk failed while waiting for md_io buffer\n"); |
b30ab791 | 511 | put_ldev(device); |
1b7ab15b | 512 | return -ENODEV; |
cdfda633 | 513 | } |
b411b363 | 514 | |
7ad651b5 LE |
515 | memset(buffer, 0, sizeof(*buffer)); |
516 | buffer->magic = cpu_to_be32(DRBD_AL_MAGIC); | |
b30ab791 | 517 | buffer->tr_number = cpu_to_be32(device->al_tr_number); |
b411b363 | 518 | |
7ad651b5 LE |
519 | i = 0; |
520 | ||
521 | /* Even though no one can start to change this list | |
522 | * once we set the LC_LOCKED -- from drbd_al_begin_io(), | |
523 | * lc_try_lock_for_transaction() --, someone may still | |
524 | * be in the process of changing it. */ | |
b30ab791 AG |
525 | spin_lock_irq(&device->al_lock); |
526 | list_for_each_entry(e, &device->act_log->to_be_changed, list) { | |
7ad651b5 LE |
527 | if (i == AL_UPDATES_PER_TRANSACTION) { |
528 | i++; | |
529 | break; | |
530 | } | |
531 | buffer->update_slot_nr[i] = cpu_to_be16(e->lc_index); | |
532 | buffer->update_extent_nr[i] = cpu_to_be32(e->lc_new_number); | |
533 | if (e->lc_number != LC_FREE) | |
b30ab791 | 534 | drbd_bm_mark_for_writeout(device, |
7ad651b5 LE |
535 | al_extent_to_bm_page(e->lc_number)); |
536 | i++; | |
537 | } | |
b30ab791 | 538 | spin_unlock_irq(&device->al_lock); |
7ad651b5 | 539 | BUG_ON(i > AL_UPDATES_PER_TRANSACTION); |
b411b363 | 540 | |
7ad651b5 LE |
541 | buffer->n_updates = cpu_to_be16(i); |
542 | for ( ; i < AL_UPDATES_PER_TRANSACTION; i++) { | |
543 | buffer->update_slot_nr[i] = cpu_to_be16(-1); | |
544 | buffer->update_extent_nr[i] = cpu_to_be32(LC_FREE); | |
545 | } | |
b411b363 | 546 | |
b30ab791 AG |
547 | buffer->context_size = cpu_to_be16(device->act_log->nr_elements); |
548 | buffer->context_start_slot_nr = cpu_to_be16(device->al_tr_cycle); | |
b411b363 | 549 | |
7ad651b5 | 550 | mx = min_t(int, AL_CONTEXT_PER_TRANSACTION, |
b30ab791 | 551 | device->act_log->nr_elements - device->al_tr_cycle); |
b411b363 | 552 | for (i = 0; i < mx; i++) { |
b30ab791 AG |
553 | unsigned idx = device->al_tr_cycle + i; |
554 | extent_nr = lc_element_by_index(device->act_log, idx)->lc_number; | |
7ad651b5 | 555 | buffer->context[i] = cpu_to_be32(extent_nr); |
b411b363 | 556 | } |
7ad651b5 LE |
557 | for (; i < AL_CONTEXT_PER_TRANSACTION; i++) |
558 | buffer->context[i] = cpu_to_be32(LC_FREE); | |
559 | ||
b30ab791 AG |
560 | device->al_tr_cycle += AL_CONTEXT_PER_TRANSACTION; |
561 | if (device->al_tr_cycle >= device->act_log->nr_elements) | |
562 | device->al_tr_cycle = 0; | |
b411b363 | 563 | |
b30ab791 | 564 | sector = al_tr_number_to_on_disk_sector(device); |
b411b363 | 565 | |
7ad651b5 LE |
566 | crc = crc32c(0, buffer, 4096); |
567 | buffer->crc32c = cpu_to_be32(crc); | |
b411b363 | 568 | |
b30ab791 | 569 | if (drbd_bm_write_hinted(device)) |
1b7ab15b | 570 | err = -EIO; |
b5bc8e08 LE |
571 | else { |
572 | bool write_al_updates; | |
573 | rcu_read_lock(); | |
b30ab791 | 574 | write_al_updates = rcu_dereference(device->ldev->disk_conf)->al_updates; |
b5bc8e08 LE |
575 | rcu_read_unlock(); |
576 | if (write_al_updates) { | |
b30ab791 | 577 | if (drbd_md_sync_page_io(device, device->ldev, sector, WRITE)) { |
b5bc8e08 | 578 | err = -EIO; |
b30ab791 | 579 | drbd_chk_io_error(device, 1, DRBD_META_IO_ERROR); |
b5bc8e08 | 580 | } else { |
b30ab791 AG |
581 | device->al_tr_number++; |
582 | device->al_writ_cnt++; | |
b5bc8e08 LE |
583 | } |
584 | } | |
7ad651b5 | 585 | } |
b411b363 | 586 | |
b30ab791 AG |
587 | drbd_md_put_buffer(device); |
588 | put_ldev(device); | |
b411b363 | 589 | |
1b7ab15b PR |
590 | return err; |
591 | } | |
592 | ||
593 | ||
594 | static int w_al_write_transaction(struct drbd_work *w, int unused) | |
595 | { | |
596 | struct update_al_work *aw = container_of(w, struct update_al_work, w); | |
b30ab791 | 597 | struct drbd_device *device = w->device; |
1b7ab15b PR |
598 | int err; |
599 | ||
b30ab791 | 600 | err = _al_write_transaction(device); |
1b7ab15b PR |
601 | aw->err = err; |
602 | complete(&aw->event); | |
603 | ||
604 | return err != -EIO ? err : 0; | |
605 | } | |
606 | ||
607 | /* Calls from worker context (see w_restart_disk_io()) need to write the | |
608 | transaction directly. Others came through generic_make_request(), | |
609 | those need to delegate it to the worker. */ | |
b30ab791 | 610 | static int al_write_transaction(struct drbd_device *device, bool delegate) |
1b7ab15b | 611 | { |
56392d2f LE |
612 | if (delegate) { |
613 | struct update_al_work al_work; | |
614 | init_completion(&al_work.event); | |
615 | al_work.w.cb = w_al_write_transaction; | |
b30ab791 | 616 | al_work.w.device = device; |
a6b32bc3 | 617 | drbd_queue_work_front(&first_peer_device(device)->connection->sender_work, &al_work.w); |
56392d2f LE |
618 | wait_for_completion(&al_work.event); |
619 | return al_work.err; | |
620 | } else | |
b30ab791 | 621 | return _al_write_transaction(device); |
b411b363 PR |
622 | } |
623 | ||
b30ab791 | 624 | static int _try_lc_del(struct drbd_device *device, struct lc_element *al_ext) |
b411b363 PR |
625 | { |
626 | int rv; | |
627 | ||
b30ab791 | 628 | spin_lock_irq(&device->al_lock); |
b411b363 PR |
629 | rv = (al_ext->refcnt == 0); |
630 | if (likely(rv)) | |
b30ab791 AG |
631 | lc_del(device->act_log, al_ext); |
632 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
633 | |
634 | return rv; | |
635 | } | |
636 | ||
637 | /** | |
638 | * drbd_al_shrink() - Removes all active extents form the activity log | |
b30ab791 | 639 | * @device: DRBD device. |
b411b363 PR |
640 | * |
641 | * Removes all active extents form the activity log, waiting until | |
642 | * the reference count of each entry dropped to 0 first, of course. | |
643 | * | |
b30ab791 | 644 | * You need to lock device->act_log with lc_try_lock() / lc_unlock() |
b411b363 | 645 | */ |
b30ab791 | 646 | void drbd_al_shrink(struct drbd_device *device) |
b411b363 PR |
647 | { |
648 | struct lc_element *al_ext; | |
649 | int i; | |
650 | ||
0b0ba1ef | 651 | D_ASSERT(device, test_bit(__LC_LOCKED, &device->act_log->flags)); |
b411b363 | 652 | |
b30ab791 AG |
653 | for (i = 0; i < device->act_log->nr_elements; i++) { |
654 | al_ext = lc_element_by_index(device->act_log, i); | |
b411b363 PR |
655 | if (al_ext->lc_number == LC_FREE) |
656 | continue; | |
b30ab791 | 657 | wait_event(device->al_wait, _try_lc_del(device, al_ext)); |
b411b363 PR |
658 | } |
659 | ||
b30ab791 | 660 | wake_up(&device->al_wait); |
b411b363 PR |
661 | } |
662 | ||
b30ab791 | 663 | int drbd_initialize_al(struct drbd_device *device, void *buffer) |
d752b269 PR |
664 | { |
665 | struct al_transaction_on_disk *al = buffer; | |
b30ab791 | 666 | struct drbd_md *md = &device->ldev->md; |
d752b269 PR |
667 | sector_t al_base = md->md_offset + md->al_offset; |
668 | int al_size_4k = md->al_stripes * md->al_stripe_size_4k; | |
669 | int i; | |
670 | ||
671 | memset(al, 0, 4096); | |
672 | al->magic = cpu_to_be32(DRBD_AL_MAGIC); | |
673 | al->transaction_type = cpu_to_be16(AL_TR_INITIALIZED); | |
674 | al->crc32c = cpu_to_be32(crc32c(0, al, 4096)); | |
675 | ||
676 | for (i = 0; i < al_size_4k; i++) { | |
b30ab791 | 677 | int err = drbd_md_sync_page_io(device, device->ldev, al_base + i * 8, WRITE); |
d752b269 PR |
678 | if (err) |
679 | return err; | |
680 | } | |
681 | return 0; | |
682 | } | |
683 | ||
99920dc5 | 684 | static int w_update_odbm(struct drbd_work *w, int unused) |
b411b363 PR |
685 | { |
686 | struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w); | |
b30ab791 | 687 | struct drbd_device *device = w->device; |
3b98c0c2 | 688 | struct sib_info sib = { .sib_reason = SIB_SYNC_PROGRESS, }; |
b411b363 | 689 | |
b30ab791 | 690 | if (!get_ldev(device)) { |
b411b363 | 691 | if (__ratelimit(&drbd_ratelimit_state)) |
d0180171 | 692 | drbd_warn(device, "Can not update on disk bitmap, local IO disabled.\n"); |
b411b363 | 693 | kfree(udw); |
99920dc5 | 694 | return 0; |
b411b363 PR |
695 | } |
696 | ||
b30ab791 AG |
697 | drbd_bm_write_page(device, rs_extent_to_bm_page(udw->enr)); |
698 | put_ldev(device); | |
b411b363 PR |
699 | |
700 | kfree(udw); | |
701 | ||
b30ab791 AG |
702 | if (drbd_bm_total_weight(device) <= device->rs_failed) { |
703 | switch (device->state.conn) { | |
b411b363 PR |
704 | case C_SYNC_SOURCE: case C_SYNC_TARGET: |
705 | case C_PAUSED_SYNC_S: case C_PAUSED_SYNC_T: | |
b30ab791 | 706 | drbd_resync_finished(device); |
b411b363 PR |
707 | default: |
708 | /* nothing to do */ | |
709 | break; | |
710 | } | |
711 | } | |
b30ab791 | 712 | drbd_bcast_event(device, &sib); |
b411b363 | 713 | |
99920dc5 | 714 | return 0; |
b411b363 PR |
715 | } |
716 | ||
717 | ||
718 | /* ATTENTION. The AL's extents are 4MB each, while the extents in the | |
719 | * resync LRU-cache are 16MB each. | |
720 | * The caller of this function has to hold an get_ldev() reference. | |
721 | * | |
722 | * TODO will be obsoleted once we have a caching lru of the on disk bitmap | |
723 | */ | |
b30ab791 | 724 | static void drbd_try_clear_on_disk_bm(struct drbd_device *device, sector_t sector, |
b411b363 PR |
725 | int count, int success) |
726 | { | |
727 | struct lc_element *e; | |
728 | struct update_odbm_work *udw; | |
729 | ||
730 | unsigned int enr; | |
731 | ||
0b0ba1ef | 732 | D_ASSERT(device, atomic_read(&device->local_cnt)); |
b411b363 PR |
733 | |
734 | /* I simply assume that a sector/size pair never crosses | |
735 | * a 16 MB extent border. (Currently this is true...) */ | |
736 | enr = BM_SECT_TO_EXT(sector); | |
737 | ||
b30ab791 | 738 | e = lc_get(device->resync, enr); |
b411b363 PR |
739 | if (e) { |
740 | struct bm_extent *ext = lc_entry(e, struct bm_extent, lce); | |
741 | if (ext->lce.lc_number == enr) { | |
742 | if (success) | |
743 | ext->rs_left -= count; | |
744 | else | |
745 | ext->rs_failed += count; | |
746 | if (ext->rs_left < ext->rs_failed) { | |
d0180171 | 747 | drbd_warn(device, "BAD! sector=%llus enr=%u rs_left=%d " |
975b2979 | 748 | "rs_failed=%d count=%d cstate=%s\n", |
b411b363 PR |
749 | (unsigned long long)sector, |
750 | ext->lce.lc_number, ext->rs_left, | |
975b2979 | 751 | ext->rs_failed, count, |
b30ab791 | 752 | drbd_conn_str(device->state.conn)); |
975b2979 PR |
753 | |
754 | /* We don't expect to be able to clear more bits | |
755 | * than have been set when we originally counted | |
756 | * the set bits to cache that value in ext->rs_left. | |
757 | * Whatever the reason (disconnect during resync, | |
758 | * delayed local completion of an application write), | |
759 | * try to fix it up by recounting here. */ | |
b30ab791 | 760 | ext->rs_left = drbd_bm_e_weight(device, enr); |
b411b363 PR |
761 | } |
762 | } else { | |
763 | /* Normally this element should be in the cache, | |
764 | * since drbd_rs_begin_io() pulled it already in. | |
765 | * | |
766 | * But maybe an application write finished, and we set | |
767 | * something outside the resync lru_cache in sync. | |
768 | */ | |
b30ab791 | 769 | int rs_left = drbd_bm_e_weight(device, enr); |
b411b363 | 770 | if (ext->flags != 0) { |
d0180171 | 771 | drbd_warn(device, "changing resync lce: %d[%u;%02lx]" |
b411b363 PR |
772 | " -> %d[%u;00]\n", |
773 | ext->lce.lc_number, ext->rs_left, | |
774 | ext->flags, enr, rs_left); | |
775 | ext->flags = 0; | |
776 | } | |
777 | if (ext->rs_failed) { | |
d0180171 | 778 | drbd_warn(device, "Kicking resync_lru element enr=%u " |
b411b363 PR |
779 | "out with rs_failed=%d\n", |
780 | ext->lce.lc_number, ext->rs_failed); | |
b411b363 PR |
781 | } |
782 | ext->rs_left = rs_left; | |
783 | ext->rs_failed = success ? 0 : count; | |
46a15bc3 LE |
784 | /* we don't keep a persistent log of the resync lru, |
785 | * we can commit any change right away. */ | |
b30ab791 | 786 | lc_committed(device->resync); |
b411b363 | 787 | } |
b30ab791 | 788 | lc_put(device->resync, &ext->lce); |
b411b363 PR |
789 | /* no race, we are within the al_lock! */ |
790 | ||
791 | if (ext->rs_left == ext->rs_failed) { | |
792 | ext->rs_failed = 0; | |
793 | ||
794 | udw = kmalloc(sizeof(*udw), GFP_ATOMIC); | |
795 | if (udw) { | |
796 | udw->enr = ext->lce.lc_number; | |
797 | udw->w.cb = w_update_odbm; | |
b30ab791 | 798 | udw->w.device = device; |
a6b32bc3 | 799 | drbd_queue_work_front(&first_peer_device(device)->connection->sender_work, &udw->w); |
b411b363 | 800 | } else { |
d0180171 | 801 | drbd_warn(device, "Could not kmalloc an udw\n"); |
b411b363 PR |
802 | } |
803 | } | |
804 | } else { | |
d0180171 | 805 | drbd_err(device, "lc_get() failed! locked=%d/%d flags=%lu\n", |
b30ab791 AG |
806 | device->resync_locked, |
807 | device->resync->nr_elements, | |
808 | device->resync->flags); | |
b411b363 PR |
809 | } |
810 | } | |
811 | ||
b30ab791 | 812 | void drbd_advance_rs_marks(struct drbd_device *device, unsigned long still_to_go) |
c6ea14df LE |
813 | { |
814 | unsigned long now = jiffies; | |
b30ab791 AG |
815 | unsigned long last = device->rs_mark_time[device->rs_last_mark]; |
816 | int next = (device->rs_last_mark + 1) % DRBD_SYNC_MARKS; | |
c6ea14df | 817 | if (time_after_eq(now, last + DRBD_SYNC_MARK_STEP)) { |
b30ab791 AG |
818 | if (device->rs_mark_left[device->rs_last_mark] != still_to_go && |
819 | device->state.conn != C_PAUSED_SYNC_T && | |
820 | device->state.conn != C_PAUSED_SYNC_S) { | |
821 | device->rs_mark_time[next] = now; | |
822 | device->rs_mark_left[next] = still_to_go; | |
823 | device->rs_last_mark = next; | |
c6ea14df LE |
824 | } |
825 | } | |
826 | } | |
827 | ||
b411b363 PR |
828 | /* clear the bit corresponding to the piece of storage in question: |
829 | * size byte of data starting from sector. Only clear a bits of the affected | |
830 | * one ore more _aligned_ BM_BLOCK_SIZE blocks. | |
831 | * | |
832 | * called by worker on C_SYNC_TARGET and receiver on SyncSource. | |
833 | * | |
834 | */ | |
b30ab791 | 835 | void __drbd_set_in_sync(struct drbd_device *device, sector_t sector, int size, |
b411b363 PR |
836 | const char *file, const unsigned int line) |
837 | { | |
838 | /* Is called from worker and receiver context _only_ */ | |
839 | unsigned long sbnr, ebnr, lbnr; | |
840 | unsigned long count = 0; | |
841 | sector_t esector, nr_sectors; | |
842 | int wake_up = 0; | |
843 | unsigned long flags; | |
844 | ||
c670a398 | 845 | if (size <= 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_BIO_SIZE) { |
d0180171 | 846 | drbd_err(device, "drbd_set_in_sync: sector=%llus size=%d nonsense!\n", |
b411b363 PR |
847 | (unsigned long long)sector, size); |
848 | return; | |
849 | } | |
518a4d53 | 850 | |
b30ab791 | 851 | if (!get_ldev(device)) |
518a4d53 PR |
852 | return; /* no disk, no metadata, no bitmap to clear bits in */ |
853 | ||
b30ab791 | 854 | nr_sectors = drbd_get_capacity(device->this_bdev); |
b411b363 PR |
855 | esector = sector + (size >> 9) - 1; |
856 | ||
841ce241 | 857 | if (!expect(sector < nr_sectors)) |
518a4d53 | 858 | goto out; |
841ce241 AG |
859 | if (!expect(esector < nr_sectors)) |
860 | esector = nr_sectors - 1; | |
b411b363 PR |
861 | |
862 | lbnr = BM_SECT_TO_BIT(nr_sectors-1); | |
863 | ||
864 | /* we clear it (in sync). | |
865 | * round up start sector, round down end sector. we make sure we only | |
866 | * clear full, aligned, BM_BLOCK_SIZE (4K) blocks */ | |
867 | if (unlikely(esector < BM_SECT_PER_BIT-1)) | |
518a4d53 | 868 | goto out; |
b411b363 PR |
869 | if (unlikely(esector == (nr_sectors-1))) |
870 | ebnr = lbnr; | |
871 | else | |
872 | ebnr = BM_SECT_TO_BIT(esector - (BM_SECT_PER_BIT-1)); | |
873 | sbnr = BM_SECT_TO_BIT(sector + BM_SECT_PER_BIT-1); | |
874 | ||
b411b363 | 875 | if (sbnr > ebnr) |
518a4d53 | 876 | goto out; |
b411b363 PR |
877 | |
878 | /* | |
879 | * ok, (capacity & 7) != 0 sometimes, but who cares... | |
880 | * we count rs_{total,left} in bits, not sectors. | |
881 | */ | |
b30ab791 | 882 | count = drbd_bm_clear_bits(device, sbnr, ebnr); |
518a4d53 | 883 | if (count) { |
b30ab791 AG |
884 | drbd_advance_rs_marks(device, drbd_bm_total_weight(device)); |
885 | spin_lock_irqsave(&device->al_lock, flags); | |
886 | drbd_try_clear_on_disk_bm(device, sector, count, true); | |
887 | spin_unlock_irqrestore(&device->al_lock, flags); | |
1d7734a0 | 888 | |
b411b363 PR |
889 | /* just wake_up unconditional now, various lc_chaged(), |
890 | * lc_put() in drbd_try_clear_on_disk_bm(). */ | |
891 | wake_up = 1; | |
892 | } | |
518a4d53 | 893 | out: |
b30ab791 | 894 | put_ldev(device); |
b411b363 | 895 | if (wake_up) |
b30ab791 | 896 | wake_up(&device->al_wait); |
b411b363 PR |
897 | } |
898 | ||
899 | /* | |
900 | * this is intended to set one request worth of data out of sync. | |
901 | * affects at least 1 bit, | |
1816a2b4 | 902 | * and at most 1+DRBD_MAX_BIO_SIZE/BM_BLOCK_SIZE bits. |
b411b363 PR |
903 | * |
904 | * called by tl_clear and drbd_send_dblock (==drbd_make_request). | |
905 | * so this can be _any_ process. | |
906 | */ | |
b30ab791 | 907 | int __drbd_set_out_of_sync(struct drbd_device *device, sector_t sector, int size, |
b411b363 PR |
908 | const char *file, const unsigned int line) |
909 | { | |
376694a0 | 910 | unsigned long sbnr, ebnr, flags; |
b411b363 | 911 | sector_t esector, nr_sectors; |
73a01a18 | 912 | unsigned int enr, count = 0; |
b411b363 PR |
913 | struct lc_element *e; |
914 | ||
81a3537a LE |
915 | /* this should be an empty REQ_FLUSH */ |
916 | if (size == 0) | |
917 | return 0; | |
918 | ||
919 | if (size < 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_BIO_SIZE) { | |
d0180171 | 920 | drbd_err(device, "sector: %llus, size: %d\n", |
b411b363 | 921 | (unsigned long long)sector, size); |
73a01a18 | 922 | return 0; |
b411b363 PR |
923 | } |
924 | ||
b30ab791 | 925 | if (!get_ldev(device)) |
73a01a18 | 926 | return 0; /* no disk, no metadata, no bitmap to set bits in */ |
b411b363 | 927 | |
b30ab791 | 928 | nr_sectors = drbd_get_capacity(device->this_bdev); |
b411b363 PR |
929 | esector = sector + (size >> 9) - 1; |
930 | ||
841ce241 | 931 | if (!expect(sector < nr_sectors)) |
b411b363 | 932 | goto out; |
841ce241 AG |
933 | if (!expect(esector < nr_sectors)) |
934 | esector = nr_sectors - 1; | |
b411b363 | 935 | |
b411b363 PR |
936 | /* we set it out of sync, |
937 | * we do not need to round anything here */ | |
938 | sbnr = BM_SECT_TO_BIT(sector); | |
939 | ebnr = BM_SECT_TO_BIT(esector); | |
940 | ||
b411b363 PR |
941 | /* ok, (capacity & 7) != 0 sometimes, but who cares... |
942 | * we count rs_{total,left} in bits, not sectors. */ | |
b30ab791 AG |
943 | spin_lock_irqsave(&device->al_lock, flags); |
944 | count = drbd_bm_set_bits(device, sbnr, ebnr); | |
b411b363 PR |
945 | |
946 | enr = BM_SECT_TO_EXT(sector); | |
b30ab791 | 947 | e = lc_find(device->resync, enr); |
b411b363 PR |
948 | if (e) |
949 | lc_entry(e, struct bm_extent, lce)->rs_left += count; | |
b30ab791 | 950 | spin_unlock_irqrestore(&device->al_lock, flags); |
b411b363 PR |
951 | |
952 | out: | |
b30ab791 | 953 | put_ldev(device); |
73a01a18 PR |
954 | |
955 | return count; | |
b411b363 PR |
956 | } |
957 | ||
958 | static | |
b30ab791 | 959 | struct bm_extent *_bme_get(struct drbd_device *device, unsigned int enr) |
b411b363 PR |
960 | { |
961 | struct lc_element *e; | |
962 | struct bm_extent *bm_ext; | |
963 | int wakeup = 0; | |
964 | unsigned long rs_flags; | |
965 | ||
b30ab791 AG |
966 | spin_lock_irq(&device->al_lock); |
967 | if (device->resync_locked > device->resync->nr_elements/2) { | |
968 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
969 | return NULL; |
970 | } | |
b30ab791 | 971 | e = lc_get(device->resync, enr); |
b411b363 PR |
972 | bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL; |
973 | if (bm_ext) { | |
974 | if (bm_ext->lce.lc_number != enr) { | |
b30ab791 | 975 | bm_ext->rs_left = drbd_bm_e_weight(device, enr); |
b411b363 | 976 | bm_ext->rs_failed = 0; |
b30ab791 | 977 | lc_committed(device->resync); |
b411b363 PR |
978 | wakeup = 1; |
979 | } | |
980 | if (bm_ext->lce.refcnt == 1) | |
b30ab791 | 981 | device->resync_locked++; |
b411b363 PR |
982 | set_bit(BME_NO_WRITES, &bm_ext->flags); |
983 | } | |
b30ab791 AG |
984 | rs_flags = device->resync->flags; |
985 | spin_unlock_irq(&device->al_lock); | |
b411b363 | 986 | if (wakeup) |
b30ab791 | 987 | wake_up(&device->al_wait); |
b411b363 PR |
988 | |
989 | if (!bm_ext) { | |
990 | if (rs_flags & LC_STARVING) | |
d0180171 | 991 | drbd_warn(device, "Have to wait for element" |
b411b363 | 992 | " (resync LRU too small?)\n"); |
46a15bc3 | 993 | BUG_ON(rs_flags & LC_LOCKED); |
b411b363 PR |
994 | } |
995 | ||
996 | return bm_ext; | |
997 | } | |
998 | ||
b30ab791 | 999 | static int _is_in_al(struct drbd_device *device, unsigned int enr) |
b411b363 | 1000 | { |
46a15bc3 | 1001 | int rv; |
b411b363 | 1002 | |
b30ab791 AG |
1003 | spin_lock_irq(&device->al_lock); |
1004 | rv = lc_is_used(device->act_log, enr); | |
1005 | spin_unlock_irq(&device->al_lock); | |
b411b363 | 1006 | |
b411b363 PR |
1007 | return rv; |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * drbd_rs_begin_io() - Gets an extent in the resync LRU cache and sets it to BME_LOCKED | |
b30ab791 | 1012 | * @device: DRBD device. |
b411b363 PR |
1013 | * @sector: The sector number. |
1014 | * | |
80a40e43 | 1015 | * This functions sleeps on al_wait. Returns 0 on success, -EINTR if interrupted. |
b411b363 | 1016 | */ |
b30ab791 | 1017 | int drbd_rs_begin_io(struct drbd_device *device, sector_t sector) |
b411b363 PR |
1018 | { |
1019 | unsigned int enr = BM_SECT_TO_EXT(sector); | |
1020 | struct bm_extent *bm_ext; | |
1021 | int i, sig; | |
f91ab628 PR |
1022 | int sa = 200; /* Step aside 200 times, then grab the extent and let app-IO wait. |
1023 | 200 times -> 20 seconds. */ | |
b411b363 | 1024 | |
f91ab628 | 1025 | retry: |
b30ab791 AG |
1026 | sig = wait_event_interruptible(device->al_wait, |
1027 | (bm_ext = _bme_get(device, enr))); | |
b411b363 | 1028 | if (sig) |
80a40e43 | 1029 | return -EINTR; |
b411b363 PR |
1030 | |
1031 | if (test_bit(BME_LOCKED, &bm_ext->flags)) | |
80a40e43 | 1032 | return 0; |
b411b363 PR |
1033 | |
1034 | for (i = 0; i < AL_EXT_PER_BM_SECT; i++) { | |
b30ab791 AG |
1035 | sig = wait_event_interruptible(device->al_wait, |
1036 | !_is_in_al(device, enr * AL_EXT_PER_BM_SECT + i) || | |
c507f46f | 1037 | test_bit(BME_PRIORITY, &bm_ext->flags)); |
f91ab628 PR |
1038 | |
1039 | if (sig || (test_bit(BME_PRIORITY, &bm_ext->flags) && sa)) { | |
b30ab791 AG |
1040 | spin_lock_irq(&device->al_lock); |
1041 | if (lc_put(device->resync, &bm_ext->lce) == 0) { | |
f91ab628 | 1042 | bm_ext->flags = 0; /* clears BME_NO_WRITES and eventually BME_PRIORITY */ |
b30ab791 AG |
1043 | device->resync_locked--; |
1044 | wake_up(&device->al_wait); | |
b411b363 | 1045 | } |
b30ab791 | 1046 | spin_unlock_irq(&device->al_lock); |
f91ab628 PR |
1047 | if (sig) |
1048 | return -EINTR; | |
1049 | if (schedule_timeout_interruptible(HZ/10)) | |
1050 | return -EINTR; | |
c507f46f | 1051 | if (sa && --sa == 0) |
d0180171 | 1052 | drbd_warn(device, "drbd_rs_begin_io() stepped aside for 20sec." |
c507f46f | 1053 | "Resync stalled?\n"); |
f91ab628 | 1054 | goto retry; |
b411b363 PR |
1055 | } |
1056 | } | |
b411b363 | 1057 | set_bit(BME_LOCKED, &bm_ext->flags); |
80a40e43 | 1058 | return 0; |
b411b363 PR |
1059 | } |
1060 | ||
1061 | /** | |
1062 | * drbd_try_rs_begin_io() - Gets an extent in the resync LRU cache, does not sleep | |
b30ab791 | 1063 | * @device: DRBD device. |
b411b363 PR |
1064 | * @sector: The sector number. |
1065 | * | |
1066 | * Gets an extent in the resync LRU cache, sets it to BME_NO_WRITES, then | |
1067 | * tries to set it to BME_LOCKED. Returns 0 upon success, and -EAGAIN | |
1068 | * if there is still application IO going on in this area. | |
1069 | */ | |
b30ab791 | 1070 | int drbd_try_rs_begin_io(struct drbd_device *device, sector_t sector) |
b411b363 PR |
1071 | { |
1072 | unsigned int enr = BM_SECT_TO_EXT(sector); | |
1073 | const unsigned int al_enr = enr*AL_EXT_PER_BM_SECT; | |
1074 | struct lc_element *e; | |
1075 | struct bm_extent *bm_ext; | |
1076 | int i; | |
1077 | ||
b30ab791 AG |
1078 | spin_lock_irq(&device->al_lock); |
1079 | if (device->resync_wenr != LC_FREE && device->resync_wenr != enr) { | |
b411b363 PR |
1080 | /* in case you have very heavy scattered io, it may |
1081 | * stall the syncer undefined if we give up the ref count | |
1082 | * when we try again and requeue. | |
1083 | * | |
1084 | * if we don't give up the refcount, but the next time | |
1085 | * we are scheduled this extent has been "synced" by new | |
1086 | * application writes, we'd miss the lc_put on the | |
1087 | * extent we keep the refcount on. | |
1088 | * so we remembered which extent we had to try again, and | |
1089 | * if the next requested one is something else, we do | |
1090 | * the lc_put here... | |
1091 | * we also have to wake_up | |
1092 | */ | |
b30ab791 | 1093 | e = lc_find(device->resync, device->resync_wenr); |
b411b363 PR |
1094 | bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL; |
1095 | if (bm_ext) { | |
0b0ba1ef AG |
1096 | D_ASSERT(device, !test_bit(BME_LOCKED, &bm_ext->flags)); |
1097 | D_ASSERT(device, test_bit(BME_NO_WRITES, &bm_ext->flags)); | |
b411b363 | 1098 | clear_bit(BME_NO_WRITES, &bm_ext->flags); |
b30ab791 AG |
1099 | device->resync_wenr = LC_FREE; |
1100 | if (lc_put(device->resync, &bm_ext->lce) == 0) | |
1101 | device->resync_locked--; | |
1102 | wake_up(&device->al_wait); | |
b411b363 | 1103 | } else { |
d0180171 | 1104 | drbd_alert(device, "LOGIC BUG\n"); |
b411b363 PR |
1105 | } |
1106 | } | |
1107 | /* TRY. */ | |
b30ab791 | 1108 | e = lc_try_get(device->resync, enr); |
b411b363 PR |
1109 | bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL; |
1110 | if (bm_ext) { | |
1111 | if (test_bit(BME_LOCKED, &bm_ext->flags)) | |
1112 | goto proceed; | |
1113 | if (!test_and_set_bit(BME_NO_WRITES, &bm_ext->flags)) { | |
b30ab791 | 1114 | device->resync_locked++; |
b411b363 PR |
1115 | } else { |
1116 | /* we did set the BME_NO_WRITES, | |
1117 | * but then could not set BME_LOCKED, | |
1118 | * so we tried again. | |
1119 | * drop the extra reference. */ | |
b411b363 | 1120 | bm_ext->lce.refcnt--; |
0b0ba1ef | 1121 | D_ASSERT(device, bm_ext->lce.refcnt > 0); |
b411b363 PR |
1122 | } |
1123 | goto check_al; | |
1124 | } else { | |
1125 | /* do we rather want to try later? */ | |
b30ab791 | 1126 | if (device->resync_locked > device->resync->nr_elements-3) |
b411b363 | 1127 | goto try_again; |
b411b363 | 1128 | /* Do or do not. There is no try. -- Yoda */ |
b30ab791 | 1129 | e = lc_get(device->resync, enr); |
b411b363 PR |
1130 | bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL; |
1131 | if (!bm_ext) { | |
b30ab791 | 1132 | const unsigned long rs_flags = device->resync->flags; |
b411b363 | 1133 | if (rs_flags & LC_STARVING) |
d0180171 | 1134 | drbd_warn(device, "Have to wait for element" |
b411b363 | 1135 | " (resync LRU too small?)\n"); |
46a15bc3 | 1136 | BUG_ON(rs_flags & LC_LOCKED); |
b411b363 PR |
1137 | goto try_again; |
1138 | } | |
1139 | if (bm_ext->lce.lc_number != enr) { | |
b30ab791 | 1140 | bm_ext->rs_left = drbd_bm_e_weight(device, enr); |
b411b363 | 1141 | bm_ext->rs_failed = 0; |
b30ab791 AG |
1142 | lc_committed(device->resync); |
1143 | wake_up(&device->al_wait); | |
0b0ba1ef | 1144 | D_ASSERT(device, test_bit(BME_LOCKED, &bm_ext->flags) == 0); |
b411b363 PR |
1145 | } |
1146 | set_bit(BME_NO_WRITES, &bm_ext->flags); | |
0b0ba1ef | 1147 | D_ASSERT(device, bm_ext->lce.refcnt == 1); |
b30ab791 | 1148 | device->resync_locked++; |
b411b363 PR |
1149 | goto check_al; |
1150 | } | |
1151 | check_al: | |
b411b363 | 1152 | for (i = 0; i < AL_EXT_PER_BM_SECT; i++) { |
b30ab791 | 1153 | if (lc_is_used(device->act_log, al_enr+i)) |
b411b363 PR |
1154 | goto try_again; |
1155 | } | |
1156 | set_bit(BME_LOCKED, &bm_ext->flags); | |
1157 | proceed: | |
b30ab791 AG |
1158 | device->resync_wenr = LC_FREE; |
1159 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
1160 | return 0; |
1161 | ||
1162 | try_again: | |
b411b363 | 1163 | if (bm_ext) |
b30ab791 AG |
1164 | device->resync_wenr = enr; |
1165 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
1166 | return -EAGAIN; |
1167 | } | |
1168 | ||
b30ab791 | 1169 | void drbd_rs_complete_io(struct drbd_device *device, sector_t sector) |
b411b363 PR |
1170 | { |
1171 | unsigned int enr = BM_SECT_TO_EXT(sector); | |
1172 | struct lc_element *e; | |
1173 | struct bm_extent *bm_ext; | |
1174 | unsigned long flags; | |
1175 | ||
b30ab791 AG |
1176 | spin_lock_irqsave(&device->al_lock, flags); |
1177 | e = lc_find(device->resync, enr); | |
b411b363 PR |
1178 | bm_ext = e ? lc_entry(e, struct bm_extent, lce) : NULL; |
1179 | if (!bm_ext) { | |
b30ab791 | 1180 | spin_unlock_irqrestore(&device->al_lock, flags); |
b411b363 | 1181 | if (__ratelimit(&drbd_ratelimit_state)) |
d0180171 | 1182 | drbd_err(device, "drbd_rs_complete_io() called, but extent not found\n"); |
b411b363 PR |
1183 | return; |
1184 | } | |
1185 | ||
1186 | if (bm_ext->lce.refcnt == 0) { | |
b30ab791 | 1187 | spin_unlock_irqrestore(&device->al_lock, flags); |
d0180171 | 1188 | drbd_err(device, "drbd_rs_complete_io(,%llu [=%u]) called, " |
b411b363 PR |
1189 | "but refcnt is 0!?\n", |
1190 | (unsigned long long)sector, enr); | |
1191 | return; | |
1192 | } | |
1193 | ||
b30ab791 | 1194 | if (lc_put(device->resync, &bm_ext->lce) == 0) { |
e3555d85 | 1195 | bm_ext->flags = 0; /* clear BME_LOCKED, BME_NO_WRITES and BME_PRIORITY */ |
b30ab791 AG |
1196 | device->resync_locked--; |
1197 | wake_up(&device->al_wait); | |
b411b363 PR |
1198 | } |
1199 | ||
b30ab791 | 1200 | spin_unlock_irqrestore(&device->al_lock, flags); |
b411b363 PR |
1201 | } |
1202 | ||
1203 | /** | |
1204 | * drbd_rs_cancel_all() - Removes all extents from the resync LRU (even BME_LOCKED) | |
b30ab791 | 1205 | * @device: DRBD device. |
b411b363 | 1206 | */ |
b30ab791 | 1207 | void drbd_rs_cancel_all(struct drbd_device *device) |
b411b363 | 1208 | { |
b30ab791 | 1209 | spin_lock_irq(&device->al_lock); |
b411b363 | 1210 | |
b30ab791 AG |
1211 | if (get_ldev_if_state(device, D_FAILED)) { /* Makes sure ->resync is there. */ |
1212 | lc_reset(device->resync); | |
1213 | put_ldev(device); | |
b411b363 | 1214 | } |
b30ab791 AG |
1215 | device->resync_locked = 0; |
1216 | device->resync_wenr = LC_FREE; | |
1217 | spin_unlock_irq(&device->al_lock); | |
1218 | wake_up(&device->al_wait); | |
b411b363 PR |
1219 | } |
1220 | ||
1221 | /** | |
1222 | * drbd_rs_del_all() - Gracefully remove all extents from the resync LRU | |
b30ab791 | 1223 | * @device: DRBD device. |
b411b363 PR |
1224 | * |
1225 | * Returns 0 upon success, -EAGAIN if at least one reference count was | |
1226 | * not zero. | |
1227 | */ | |
b30ab791 | 1228 | int drbd_rs_del_all(struct drbd_device *device) |
b411b363 PR |
1229 | { |
1230 | struct lc_element *e; | |
1231 | struct bm_extent *bm_ext; | |
1232 | int i; | |
1233 | ||
b30ab791 | 1234 | spin_lock_irq(&device->al_lock); |
b411b363 | 1235 | |
b30ab791 | 1236 | if (get_ldev_if_state(device, D_FAILED)) { |
b411b363 | 1237 | /* ok, ->resync is there. */ |
b30ab791 AG |
1238 | for (i = 0; i < device->resync->nr_elements; i++) { |
1239 | e = lc_element_by_index(device->resync, i); | |
b2b163dd | 1240 | bm_ext = lc_entry(e, struct bm_extent, lce); |
b411b363 PR |
1241 | if (bm_ext->lce.lc_number == LC_FREE) |
1242 | continue; | |
b30ab791 | 1243 | if (bm_ext->lce.lc_number == device->resync_wenr) { |
d0180171 | 1244 | drbd_info(device, "dropping %u in drbd_rs_del_all, apparently" |
b411b363 | 1245 | " got 'synced' by application io\n", |
b30ab791 | 1246 | device->resync_wenr); |
0b0ba1ef AG |
1247 | D_ASSERT(device, !test_bit(BME_LOCKED, &bm_ext->flags)); |
1248 | D_ASSERT(device, test_bit(BME_NO_WRITES, &bm_ext->flags)); | |
b411b363 | 1249 | clear_bit(BME_NO_WRITES, &bm_ext->flags); |
b30ab791 AG |
1250 | device->resync_wenr = LC_FREE; |
1251 | lc_put(device->resync, &bm_ext->lce); | |
b411b363 PR |
1252 | } |
1253 | if (bm_ext->lce.refcnt != 0) { | |
d0180171 | 1254 | drbd_info(device, "Retrying drbd_rs_del_all() later. " |
b411b363 | 1255 | "refcnt=%d\n", bm_ext->lce.refcnt); |
b30ab791 AG |
1256 | put_ldev(device); |
1257 | spin_unlock_irq(&device->al_lock); | |
b411b363 PR |
1258 | return -EAGAIN; |
1259 | } | |
0b0ba1ef AG |
1260 | D_ASSERT(device, !test_bit(BME_LOCKED, &bm_ext->flags)); |
1261 | D_ASSERT(device, !test_bit(BME_NO_WRITES, &bm_ext->flags)); | |
b30ab791 | 1262 | lc_del(device->resync, &bm_ext->lce); |
b411b363 | 1263 | } |
0b0ba1ef | 1264 | D_ASSERT(device, device->resync->used == 0); |
b30ab791 | 1265 | put_ldev(device); |
b411b363 | 1266 | } |
b30ab791 AG |
1267 | spin_unlock_irq(&device->al_lock); |
1268 | wake_up(&device->al_wait); | |
b411b363 PR |
1269 | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | /** | |
1274 | * drbd_rs_failed_io() - Record information on a failure to resync the specified blocks | |
b30ab791 | 1275 | * @device: DRBD device. |
b411b363 PR |
1276 | * @sector: The sector number. |
1277 | * @size: Size of failed IO operation, in byte. | |
1278 | */ | |
b30ab791 | 1279 | void drbd_rs_failed_io(struct drbd_device *device, sector_t sector, int size) |
b411b363 PR |
1280 | { |
1281 | /* Is called from worker and receiver context _only_ */ | |
1282 | unsigned long sbnr, ebnr, lbnr; | |
1283 | unsigned long count; | |
1284 | sector_t esector, nr_sectors; | |
1285 | int wake_up = 0; | |
1286 | ||
c670a398 | 1287 | if (size <= 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_BIO_SIZE) { |
d0180171 | 1288 | drbd_err(device, "drbd_rs_failed_io: sector=%llus size=%d nonsense!\n", |
b411b363 PR |
1289 | (unsigned long long)sector, size); |
1290 | return; | |
1291 | } | |
b30ab791 | 1292 | nr_sectors = drbd_get_capacity(device->this_bdev); |
b411b363 PR |
1293 | esector = sector + (size >> 9) - 1; |
1294 | ||
841ce241 AG |
1295 | if (!expect(sector < nr_sectors)) |
1296 | return; | |
1297 | if (!expect(esector < nr_sectors)) | |
1298 | esector = nr_sectors - 1; | |
b411b363 PR |
1299 | |
1300 | lbnr = BM_SECT_TO_BIT(nr_sectors-1); | |
1301 | ||
1302 | /* | |
1303 | * round up start sector, round down end sector. we make sure we only | |
1304 | * handle full, aligned, BM_BLOCK_SIZE (4K) blocks */ | |
1305 | if (unlikely(esector < BM_SECT_PER_BIT-1)) | |
1306 | return; | |
1307 | if (unlikely(esector == (nr_sectors-1))) | |
1308 | ebnr = lbnr; | |
1309 | else | |
1310 | ebnr = BM_SECT_TO_BIT(esector - (BM_SECT_PER_BIT-1)); | |
1311 | sbnr = BM_SECT_TO_BIT(sector + BM_SECT_PER_BIT-1); | |
1312 | ||
1313 | if (sbnr > ebnr) | |
1314 | return; | |
1315 | ||
1316 | /* | |
1317 | * ok, (capacity & 7) != 0 sometimes, but who cares... | |
1318 | * we count rs_{total,left} in bits, not sectors. | |
1319 | */ | |
b30ab791 AG |
1320 | spin_lock_irq(&device->al_lock); |
1321 | count = drbd_bm_count_bits(device, sbnr, ebnr); | |
b411b363 | 1322 | if (count) { |
b30ab791 | 1323 | device->rs_failed += count; |
b411b363 | 1324 | |
b30ab791 AG |
1325 | if (get_ldev(device)) { |
1326 | drbd_try_clear_on_disk_bm(device, sector, count, false); | |
1327 | put_ldev(device); | |
b411b363 PR |
1328 | } |
1329 | ||
1330 | /* just wake_up unconditional now, various lc_chaged(), | |
1331 | * lc_put() in drbd_try_clear_on_disk_bm(). */ | |
1332 | wake_up = 1; | |
1333 | } | |
b30ab791 | 1334 | spin_unlock_irq(&device->al_lock); |
b411b363 | 1335 | if (wake_up) |
b30ab791 | 1336 | wake_up(&device->al_wait); |
b411b363 | 1337 | } |