Lines Matching refs:pool
223 struct pool { struct
275 static enum pool_mode get_pool_mode(struct pool *pool); argument
276 static void metadata_operation_failed(struct pool *pool, const char *op, int r);
283 struct pool *pool; member
303 struct pool *pool; member
374 static bool block_size_is_power_of_two(struct pool *pool) in block_size_is_power_of_two() argument
376 return pool->sectors_per_block_shift >= 0; in block_size_is_power_of_two()
379 static sector_t block_to_sectors(struct pool *pool, dm_block_t b) in block_to_sectors() argument
381 return block_size_is_power_of_two(pool) ? in block_to_sectors()
382 (b << pool->sectors_per_block_shift) : in block_to_sectors()
383 (b * pool->sectors_per_block); in block_to_sectors()
389 sector_t s = block_to_sectors(tc->pool, data_b); in issue_discard()
390 sector_t len = block_to_sectors(tc->pool, data_e - data_b); in issue_discard()
402 static void wake_worker(struct pool *pool) in wake_worker() argument
404 queue_work(pool->wq, &pool->worker); in wake_worker()
409 static int bio_detain(struct pool *pool, struct dm_cell_key *key, struct bio *bio, in bio_detain() argument
419 cell_prealloc = dm_bio_prison_alloc_cell(pool->prison, GFP_NOIO); in bio_detain()
421 r = dm_bio_detain(pool->prison, key, bio, cell_prealloc, cell_result); in bio_detain()
427 dm_bio_prison_free_cell(pool->prison, cell_prealloc); in bio_detain()
432 static void cell_release(struct pool *pool, in cell_release() argument
436 dm_cell_release(pool->prison, cell, bios); in cell_release()
437 dm_bio_prison_free_cell(pool->prison, cell); in cell_release()
440 static void cell_visit_release(struct pool *pool, in cell_visit_release() argument
445 dm_cell_visit_release(pool->prison, fn, context, cell); in cell_visit_release()
446 dm_bio_prison_free_cell(pool->prison, cell); in cell_visit_release()
449 static void cell_release_no_holder(struct pool *pool, in cell_release_no_holder() argument
453 dm_cell_release_no_holder(pool->prison, cell, bios); in cell_release_no_holder()
454 dm_bio_prison_free_cell(pool->prison, cell); in cell_release_no_holder()
457 static void cell_error_with_code(struct pool *pool, in cell_error_with_code() argument
460 dm_cell_error(pool->prison, cell, error_code); in cell_error_with_code()
461 dm_bio_prison_free_cell(pool->prison, cell); in cell_error_with_code()
464 static void cell_error(struct pool *pool, struct dm_bio_prison_cell *cell) in cell_error() argument
466 cell_error_with_code(pool, cell, -EIO); in cell_error()
469 static void cell_success(struct pool *pool, struct dm_bio_prison_cell *cell) in cell_success() argument
471 cell_error_with_code(pool, cell, 0); in cell_success()
474 static void cell_requeue(struct pool *pool, struct dm_bio_prison_cell *cell) in cell_requeue() argument
476 cell_error_with_code(pool, cell, DM_ENDIO_REQUEUE); in cell_requeue()
495 static void __pool_table_insert(struct pool *pool) in __pool_table_insert() argument
498 list_add(&pool->list, &dm_thin_pool_table.pools); in __pool_table_insert()
501 static void __pool_table_remove(struct pool *pool) in __pool_table_remove() argument
504 list_del(&pool->list); in __pool_table_remove()
507 static struct pool *__pool_table_lookup(struct mapped_device *md) in __pool_table_lookup()
509 struct pool *pool = NULL, *tmp; in __pool_table_lookup() local
515 pool = tmp; in __pool_table_lookup()
520 return pool; in __pool_table_lookup()
523 static struct pool *__pool_table_lookup_metadata_dev(struct block_device *md_dev) in __pool_table_lookup_metadata_dev()
525 struct pool *pool = NULL, *tmp; in __pool_table_lookup_metadata_dev() local
531 pool = tmp; in __pool_table_lookup_metadata_dev()
536 return pool; in __pool_table_lookup_metadata_dev()
582 struct pool *pool = tc->pool; in requeue_deferred_cells() local
594 cell_requeue(pool, cell); in requeue_deferred_cells()
613 static void error_retry_list_with_code(struct pool *pool, int error) in error_retry_list_with_code() argument
618 list_for_each_entry_rcu(tc, &pool->active_thins, list) in error_retry_list_with_code()
623 static void error_retry_list(struct pool *pool) in error_retry_list() argument
625 return error_retry_list_with_code(pool, -EIO); in error_retry_list()
637 struct pool *pool = tc->pool; in get_bio_block() local
640 if (block_size_is_power_of_two(pool)) in get_bio_block()
641 block_nr >>= pool->sectors_per_block_shift; in get_bio_block()
643 (void) sector_div(block_nr, pool->sectors_per_block); in get_bio_block()
654 struct pool *pool = tc->pool; in get_bio_block_range() local
658 b += pool->sectors_per_block - 1ull; /* so we round up */ in get_bio_block_range()
660 if (block_size_is_power_of_two(pool)) { in get_bio_block_range()
661 b >>= pool->sectors_per_block_shift; in get_bio_block_range()
662 e >>= pool->sectors_per_block_shift; in get_bio_block_range()
664 (void) sector_div(b, pool->sectors_per_block); in get_bio_block_range()
665 (void) sector_div(e, pool->sectors_per_block); in get_bio_block_range()
678 struct pool *pool = tc->pool; in remap() local
682 if (block_size_is_power_of_two(pool)) in remap()
684 (block << pool->sectors_per_block_shift) | in remap()
685 (bi_sector & (pool->sectors_per_block - 1)); in remap()
687 bio->bi_iter.bi_sector = (block * pool->sectors_per_block) + in remap()
688 sector_div(bi_sector, pool->sectors_per_block); in remap()
702 static void inc_all_io_entry(struct pool *pool, struct bio *bio) in inc_all_io_entry() argument
710 h->all_io_entry = dm_deferred_entry_inc(pool->all_io_ds); in inc_all_io_entry()
715 struct pool *pool = tc->pool; in issue() local
737 spin_lock_irqsave(&pool->lock, flags); in issue()
738 bio_list_add(&pool->deferred_flush_bios, bio); in issue()
739 spin_unlock_irqrestore(&pool->lock, flags); in issue()
791 struct pool *pool = m->tc->pool; in __complete_mapping_preparation() local
794 list_add_tail(&m->list, &pool->prepared_mappings); in __complete_mapping_preparation()
795 wake_worker(pool); in __complete_mapping_preparation()
802 struct pool *pool = m->tc->pool; in complete_mapping_preparation() local
804 spin_lock_irqsave(&pool->lock, flags); in complete_mapping_preparation()
806 spin_unlock_irqrestore(&pool->lock, flags); in complete_mapping_preparation()
844 struct pool *pool = tc->pool; in cell_defer_no_holder() local
848 cell_release_no_holder(pool, cell, &tc->deferred_bio_list); in cell_defer_no_holder()
851 wake_worker(pool); in cell_defer_no_holder()
872 inc_all_io_entry(info->tc->pool, bio); in __inc_remap_and_issue_cell()
900 cell_visit_release(tc->pool, __inc_remap_and_issue_cell, in inc_remap_and_issue_cell()
912 cell_error(m->tc->pool, m->cell); in process_prepared_mapping_fail()
914 mempool_free(m, m->tc->pool->mapping_pool); in process_prepared_mapping_fail()
920 struct pool *pool = tc->pool; in process_prepared_mapping() local
925 cell_error(pool, m->cell); in process_prepared_mapping()
936 metadata_operation_failed(pool, "dm_thin_insert_block", r); in process_prepared_mapping()
937 cell_error(pool, m->cell); in process_prepared_mapping()
951 inc_all_io_entry(tc->pool, m->cell->holder); in process_prepared_mapping()
958 mempool_free(m, pool->mapping_pool); in process_prepared_mapping()
968 mempool_free(m, tc->pool->mapping_pool); in free_discard_mapping()
990 metadata_operation_failed(tc->pool, "dm_thin_remove_range", r); in process_prepared_discard_no_passdown()
996 mempool_free(m, tc->pool->mapping_pool); in process_prepared_discard_no_passdown()
1008 struct pool *pool = tc->pool; in passdown_double_checking_shared_status() local
1014 r = dm_pool_block_is_used(pool->pmd, b, &used); in passdown_double_checking_shared_status()
1027 r = dm_pool_block_is_used(pool->pmd, e, &used); in passdown_double_checking_shared_status()
1049 struct pool *pool = tc->pool; in process_prepared_discard_passdown() local
1053 metadata_operation_failed(pool, "dm_thin_remove_range", r); in process_prepared_discard_passdown()
1067 mempool_free(m, pool->mapping_pool); in process_prepared_discard_passdown()
1070 static void process_prepared(struct pool *pool, struct list_head *head, in process_prepared() argument
1078 spin_lock_irqsave(&pool->lock, flags); in process_prepared()
1080 spin_unlock_irqrestore(&pool->lock, flags); in process_prepared()
1089 static int io_overlaps_block(struct pool *pool, struct bio *bio) in io_overlaps_block() argument
1092 (pool->sectors_per_block << SECTOR_SHIFT); in io_overlaps_block()
1095 static int io_overwrites_block(struct pool *pool, struct bio *bio) in io_overwrites_block() argument
1098 io_overlaps_block(pool, bio); in io_overwrites_block()
1108 static int ensure_next_mapping(struct pool *pool) in ensure_next_mapping() argument
1110 if (pool->next_mapping) in ensure_next_mapping()
1113 pool->next_mapping = mempool_alloc(pool->mapping_pool, GFP_ATOMIC); in ensure_next_mapping()
1115 return pool->next_mapping ? 0 : -ENOMEM; in ensure_next_mapping()
1118 static struct dm_thin_new_mapping *get_next_mapping(struct pool *pool) in get_next_mapping() argument
1120 struct dm_thin_new_mapping *m = pool->next_mapping; in get_next_mapping()
1122 BUG_ON(!pool->next_mapping); in get_next_mapping()
1128 pool->next_mapping = NULL; in get_next_mapping()
1143 r = dm_kcopyd_zero(tc->pool->copier, 1, &to, 0, copy_complete, m); in ll_zero()
1154 struct pool *pool = tc->pool; in remap_and_issue_overwrite() local
1160 inc_all_io_entry(pool, bio); in remap_and_issue_overwrite()
1174 struct pool *pool = tc->pool; in schedule_copy() local
1175 struct dm_thin_new_mapping *m = get_next_mapping(pool); in schedule_copy()
1190 if (!dm_deferred_set_add_work(pool->shared_read_ds, &m->list)) in schedule_copy()
1199 if (io_overwrites_block(pool, bio)) in schedule_copy()
1205 from.sector = data_origin * pool->sectors_per_block; in schedule_copy()
1209 to.sector = data_dest * pool->sectors_per_block; in schedule_copy()
1212 r = dm_kcopyd_copy(pool->copier, &from, 1, &to, in schedule_copy()
1229 if (len < pool->sectors_per_block && pool->pf.zero_new_blocks) { in schedule_copy()
1232 data_dest * pool->sectors_per_block + len, in schedule_copy()
1233 (data_dest + 1) * pool->sectors_per_block); in schedule_copy()
1246 tc->pool->sectors_per_block); in schedule_internal_copy()
1253 struct pool *pool = tc->pool; in schedule_zero() local
1254 struct dm_thin_new_mapping *m = get_next_mapping(pool); in schedule_zero()
1268 if (pool->pf.zero_new_blocks) { in schedule_zero()
1269 if (io_overwrites_block(pool, bio)) in schedule_zero()
1272 ll_zero(tc, m, data_block * pool->sectors_per_block, in schedule_zero()
1273 (data_block + 1) * pool->sectors_per_block); in schedule_zero()
1282 struct pool *pool = tc->pool; in schedule_external_copy() local
1283 sector_t virt_block_begin = virt_block * pool->sectors_per_block; in schedule_external_copy()
1284 sector_t virt_block_end = (virt_block + 1) * pool->sectors_per_block; in schedule_external_copy()
1289 pool->sectors_per_block); in schedule_external_copy()
1300 static void set_pool_mode(struct pool *pool, enum pool_mode new_mode);
1302 static void check_for_space(struct pool *pool) in check_for_space() argument
1307 if (get_pool_mode(pool) != PM_OUT_OF_DATA_SPACE) in check_for_space()
1310 r = dm_pool_get_free_block_count(pool->pmd, &nr_free); in check_for_space()
1315 set_pool_mode(pool, PM_WRITE); in check_for_space()
1322 static int commit(struct pool *pool) in commit() argument
1326 if (get_pool_mode(pool) >= PM_READ_ONLY) in commit()
1329 r = dm_pool_commit_metadata(pool->pmd); in commit()
1331 metadata_operation_failed(pool, "dm_pool_commit_metadata", r); in commit()
1333 check_for_space(pool); in commit()
1338 static void check_low_water_mark(struct pool *pool, dm_block_t free_blocks) in check_low_water_mark() argument
1342 if (free_blocks <= pool->low_water_blocks && !pool->low_water_triggered) { in check_low_water_mark()
1344 dm_device_name(pool->pool_md)); in check_low_water_mark()
1345 spin_lock_irqsave(&pool->lock, flags); in check_low_water_mark()
1346 pool->low_water_triggered = true; in check_low_water_mark()
1347 spin_unlock_irqrestore(&pool->lock, flags); in check_low_water_mark()
1348 dm_table_event(pool->ti->table); in check_low_water_mark()
1356 struct pool *pool = tc->pool; in alloc_data_block() local
1358 if (WARN_ON(get_pool_mode(pool) != PM_WRITE)) in alloc_data_block()
1361 r = dm_pool_get_free_block_count(pool->pmd, &free_blocks); in alloc_data_block()
1363 metadata_operation_failed(pool, "dm_pool_get_free_block_count", r); in alloc_data_block()
1367 check_low_water_mark(pool, free_blocks); in alloc_data_block()
1374 r = commit(pool); in alloc_data_block()
1378 r = dm_pool_get_free_block_count(pool->pmd, &free_blocks); in alloc_data_block()
1380 metadata_operation_failed(pool, "dm_pool_get_free_block_count", r); in alloc_data_block()
1385 set_pool_mode(pool, PM_OUT_OF_DATA_SPACE); in alloc_data_block()
1390 r = dm_pool_alloc_data_block(pool->pmd, result); in alloc_data_block()
1392 metadata_operation_failed(pool, "dm_pool_alloc_data_block", r); in alloc_data_block()
1414 static int should_error_unserviceable_bio(struct pool *pool) in should_error_unserviceable_bio() argument
1416 enum pool_mode m = get_pool_mode(pool); in should_error_unserviceable_bio()
1425 return pool->pf.error_if_no_space ? -ENOSPC : 0; in should_error_unserviceable_bio()
1437 static void handle_unserviceable_bio(struct pool *pool, struct bio *bio) in handle_unserviceable_bio() argument
1439 int error = should_error_unserviceable_bio(pool); in handle_unserviceable_bio()
1448 static void retry_bios_on_resume(struct pool *pool, struct dm_bio_prison_cell *cell) in retry_bios_on_resume() argument
1454 error = should_error_unserviceable_bio(pool); in retry_bios_on_resume()
1456 cell_error_with_code(pool, cell, error); in retry_bios_on_resume()
1461 cell_release(pool, cell, &bios); in retry_bios_on_resume()
1470 struct pool *pool = tc->pool; in process_discard_cell_no_passdown() local
1471 struct dm_thin_new_mapping *m = get_next_mapping(pool); in process_discard_cell_no_passdown()
1483 if (!dm_deferred_set_add_work(pool->all_io_ds, &m->list)) in process_discard_cell_no_passdown()
1484 pool->process_prepared_discard(m); in process_discard_cell_no_passdown()
1501 struct pool *pool = tc->pool; in break_up_discard_bio() local
1511 r = ensure_next_mapping(pool); in break_up_discard_bio()
1526 if (bio_detain(tc->pool, &data_key, NULL, &data_cell)) { in break_up_discard_bio()
1536 m = get_next_mapping(pool); in break_up_discard_bio()
1554 if (!dm_deferred_set_add_work(pool->all_io_ds, &m->list)) in break_up_discard_bio()
1555 pool->process_prepared_discard(m); in break_up_discard_bio()
1598 if (bio_detain(tc->pool, &virt_key, bio, &virt_cell)) in process_discard_bio()
1608 tc->pool->process_discard_cell(tc, virt_cell); in process_discard_bio()
1618 struct pool *pool = tc->pool; in break_sharing() local
1628 retry_bios_on_resume(pool, cell); in break_sharing()
1634 cell_error(pool, cell); in break_sharing()
1652 h->shared_read_entry = dm_deferred_entry_inc(info->tc->pool->shared_read_ds); in __remap_and_issue_shared_cell()
1653 inc_all_io_entry(info->tc->pool, bio); in __remap_and_issue_shared_cell()
1670 cell_visit_release(tc->pool, __remap_and_issue_shared_cell, in remap_and_issue_shared_cell()
1686 struct pool *pool = tc->pool; in process_shared_bio() local
1694 if (bio_detain(pool, &key, bio, &data_cell)) { in process_shared_bio()
1705 h->shared_read_entry = dm_deferred_entry_inc(pool->shared_read_ds); in process_shared_bio()
1706 inc_all_io_entry(pool, bio); in process_shared_bio()
1719 struct pool *pool = tc->pool; in provision_block() local
1725 inc_all_io_entry(pool, bio); in provision_block()
1752 retry_bios_on_resume(pool, cell); in provision_block()
1758 cell_error(pool, cell); in provision_block()
1766 struct pool *pool = tc->pool; in process_cell() local
1772 cell_requeue(pool, cell); in process_cell()
1782 inc_all_io_entry(pool, bio); in process_cell()
1790 inc_all_io_entry(pool, bio); in process_cell()
1820 struct pool *pool = tc->pool; in process_bio() local
1830 if (bio_detain(pool, &key, bio, &cell)) in process_bio()
1848 handle_unserviceable_bio(tc->pool, bio); in __process_bio_read_only()
1852 inc_all_io_entry(tc->pool, bio); in __process_bio_read_only()
1863 handle_unserviceable_bio(tc->pool, bio); in __process_bio_read_only()
1868 inc_all_io_entry(tc->pool, bio); in __process_bio_read_only()
1909 cell_success(tc->pool, cell); in process_cell_success()
1914 cell_error(tc->pool, cell); in process_cell_fail()
1921 static int need_commit_due_to_time(struct pool *pool) in need_commit_due_to_time() argument
1923 return !time_in_range(jiffies, pool->last_commit_jiffies, in need_commit_due_to_time()
1924 pool->last_commit_jiffies + COMMIT_PERIOD); in need_commit_due_to_time()
1993 struct pool *pool = tc->pool; in process_thin_deferred_bios() local
2028 if (ensure_next_mapping(pool)) { in process_thin_deferred_bios()
2037 pool->process_discard(tc, bio); in process_thin_deferred_bios()
2039 pool->process_bio(tc, bio); in process_thin_deferred_bios()
2042 throttle_work_update(&pool->throttle); in process_thin_deferred_bios()
2043 dm_pool_issue_prefetches(pool->pmd); in process_thin_deferred_bios()
2066 static unsigned sort_cells(struct pool *pool, struct list_head *cells) in sort_cells() argument
2075 pool->cell_sort_array[count++] = cell; in sort_cells()
2079 sort(pool->cell_sort_array, count, sizeof(cell), cmp_cells, NULL); in sort_cells()
2086 struct pool *pool = tc->pool; in process_thin_deferred_cells() local
2102 count = sort_cells(tc->pool, &cells); in process_thin_deferred_cells()
2105 cell = pool->cell_sort_array[i]; in process_thin_deferred_cells()
2113 if (ensure_next_mapping(pool)) { in process_thin_deferred_cells()
2115 list_add(&pool->cell_sort_array[j]->user_list, &cells); in process_thin_deferred_cells()
2124 pool->process_discard_cell(tc, cell); in process_thin_deferred_cells()
2126 pool->process_cell(tc, cell); in process_thin_deferred_cells()
2139 static struct thin_c *get_first_thin(struct pool *pool) in get_first_thin() argument
2144 if (!list_empty(&pool->active_thins)) { in get_first_thin()
2145 tc = list_entry_rcu(pool->active_thins.next, struct thin_c, list); in get_first_thin()
2153 static struct thin_c *get_next_thin(struct pool *pool, struct thin_c *tc) in get_next_thin() argument
2158 list_for_each_entry_continue_rcu(tc, &pool->active_thins, list) { in get_next_thin()
2170 static void process_deferred_bios(struct pool *pool) in process_deferred_bios() argument
2177 tc = get_first_thin(pool); in process_deferred_bios()
2181 tc = get_next_thin(pool, tc); in process_deferred_bios()
2189 spin_lock_irqsave(&pool->lock, flags); in process_deferred_bios()
2190 bio_list_merge(&bios, &pool->deferred_flush_bios); in process_deferred_bios()
2191 bio_list_init(&pool->deferred_flush_bios); in process_deferred_bios()
2192 spin_unlock_irqrestore(&pool->lock, flags); in process_deferred_bios()
2195 !(dm_pool_changed_this_transaction(pool->pmd) && need_commit_due_to_time(pool))) in process_deferred_bios()
2198 if (commit(pool)) { in process_deferred_bios()
2203 pool->last_commit_jiffies = jiffies; in process_deferred_bios()
2211 struct pool *pool = container_of(ws, struct pool, worker); in do_worker() local
2213 throttle_work_start(&pool->throttle); in do_worker()
2214 dm_pool_issue_prefetches(pool->pmd); in do_worker()
2215 throttle_work_update(&pool->throttle); in do_worker()
2216 process_prepared(pool, &pool->prepared_mappings, &pool->process_prepared_mapping); in do_worker()
2217 throttle_work_update(&pool->throttle); in do_worker()
2218 process_prepared(pool, &pool->prepared_discards, &pool->process_prepared_discard); in do_worker()
2219 throttle_work_update(&pool->throttle); in do_worker()
2220 process_deferred_bios(pool); in do_worker()
2221 throttle_work_complete(&pool->throttle); in do_worker()
2230 struct pool *pool = container_of(to_delayed_work(ws), struct pool, waker); in do_waker() local
2231 wake_worker(pool); in do_waker()
2232 queue_delayed_work(pool->wq, &pool->waker, COMMIT_PERIOD); in do_waker()
2235 static void notify_of_pool_mode_change_to_oods(struct pool *pool);
2244 struct pool *pool = container_of(to_delayed_work(ws), struct pool, in do_no_space_timeout() local
2247 if (get_pool_mode(pool) == PM_OUT_OF_DATA_SPACE && !pool->pf.error_if_no_space) { in do_no_space_timeout()
2248 pool->pf.error_if_no_space = true; in do_no_space_timeout()
2249 notify_of_pool_mode_change_to_oods(pool); in do_no_space_timeout()
2250 error_retry_list_with_code(pool, -ENOSPC); in do_no_space_timeout()
2271 static void pool_work_wait(struct pool_work *pw, struct pool *pool, in pool_work_wait() argument
2276 queue_work(pool->wq, &pw->worker); in pool_work_wait()
2312 pool_work_wait(&w.pw, tc->pool, fn); in noflush_work()
2317 static enum pool_mode get_pool_mode(struct pool *pool) in get_pool_mode() argument
2319 return pool->pf.mode; in get_pool_mode()
2322 static void notify_of_pool_mode_change(struct pool *pool, const char *new_mode) in notify_of_pool_mode_change() argument
2324 dm_table_event(pool->ti->table); in notify_of_pool_mode_change()
2326 dm_device_name(pool->pool_md), new_mode); in notify_of_pool_mode_change()
2329 static void notify_of_pool_mode_change_to_oods(struct pool *pool) in notify_of_pool_mode_change_to_oods() argument
2331 if (!pool->pf.error_if_no_space) in notify_of_pool_mode_change_to_oods()
2332 notify_of_pool_mode_change(pool, "out-of-data-space (queue IO)"); in notify_of_pool_mode_change_to_oods()
2334 notify_of_pool_mode_change(pool, "out-of-data-space (error IO)"); in notify_of_pool_mode_change_to_oods()
2342 static void set_discard_callbacks(struct pool *pool) in set_discard_callbacks() argument
2344 struct pool_c *pt = pool->ti->private; in set_discard_callbacks()
2347 pool->process_discard_cell = process_discard_cell_passdown; in set_discard_callbacks()
2348 pool->process_prepared_discard = process_prepared_discard_passdown; in set_discard_callbacks()
2350 pool->process_discard_cell = process_discard_cell_no_passdown; in set_discard_callbacks()
2351 pool->process_prepared_discard = process_prepared_discard_no_passdown; in set_discard_callbacks()
2355 static void set_pool_mode(struct pool *pool, enum pool_mode new_mode) in set_pool_mode() argument
2357 struct pool_c *pt = pool->ti->private; in set_pool_mode()
2358 bool needs_check = dm_pool_metadata_needs_check(pool->pmd); in set_pool_mode()
2359 enum pool_mode old_mode = get_pool_mode(pool); in set_pool_mode()
2368 dm_device_name(pool->pool_md)); in set_pool_mode()
2385 notify_of_pool_mode_change(pool, "failure"); in set_pool_mode()
2386 dm_pool_metadata_read_only(pool->pmd); in set_pool_mode()
2387 pool->process_bio = process_bio_fail; in set_pool_mode()
2388 pool->process_discard = process_bio_fail; in set_pool_mode()
2389 pool->process_cell = process_cell_fail; in set_pool_mode()
2390 pool->process_discard_cell = process_cell_fail; in set_pool_mode()
2391 pool->process_prepared_mapping = process_prepared_mapping_fail; in set_pool_mode()
2392 pool->process_prepared_discard = process_prepared_discard_fail; in set_pool_mode()
2394 error_retry_list(pool); in set_pool_mode()
2399 notify_of_pool_mode_change(pool, "read-only"); in set_pool_mode()
2400 dm_pool_metadata_read_only(pool->pmd); in set_pool_mode()
2401 pool->process_bio = process_bio_read_only; in set_pool_mode()
2402 pool->process_discard = process_bio_success; in set_pool_mode()
2403 pool->process_cell = process_cell_read_only; in set_pool_mode()
2404 pool->process_discard_cell = process_cell_success; in set_pool_mode()
2405 pool->process_prepared_mapping = process_prepared_mapping_fail; in set_pool_mode()
2406 pool->process_prepared_discard = process_prepared_discard_success; in set_pool_mode()
2408 error_retry_list(pool); in set_pool_mode()
2421 notify_of_pool_mode_change_to_oods(pool); in set_pool_mode()
2422 pool->process_bio = process_bio_read_only; in set_pool_mode()
2423 pool->process_discard = process_discard_bio; in set_pool_mode()
2424 pool->process_cell = process_cell_read_only; in set_pool_mode()
2425 pool->process_prepared_mapping = process_prepared_mapping; in set_pool_mode()
2426 set_discard_callbacks(pool); in set_pool_mode()
2428 if (!pool->pf.error_if_no_space && no_space_timeout) in set_pool_mode()
2429 queue_delayed_work(pool->wq, &pool->no_space_timeout, no_space_timeout); in set_pool_mode()
2434 notify_of_pool_mode_change(pool, "write"); in set_pool_mode()
2435 pool->pf.error_if_no_space = pt->requested_pf.error_if_no_space; in set_pool_mode()
2436 dm_pool_metadata_read_write(pool->pmd); in set_pool_mode()
2437 pool->process_bio = process_bio; in set_pool_mode()
2438 pool->process_discard = process_discard_bio; in set_pool_mode()
2439 pool->process_cell = process_cell; in set_pool_mode()
2440 pool->process_prepared_mapping = process_prepared_mapping; in set_pool_mode()
2441 set_discard_callbacks(pool); in set_pool_mode()
2445 pool->pf.mode = new_mode; in set_pool_mode()
2453 static void abort_transaction(struct pool *pool) in abort_transaction() argument
2455 const char *dev_name = dm_device_name(pool->pool_md); in abort_transaction()
2458 if (dm_pool_abort_metadata(pool->pmd)) { in abort_transaction()
2460 set_pool_mode(pool, PM_FAIL); in abort_transaction()
2463 if (dm_pool_metadata_set_needs_check(pool->pmd)) { in abort_transaction()
2465 set_pool_mode(pool, PM_FAIL); in abort_transaction()
2469 static void metadata_operation_failed(struct pool *pool, const char *op, int r) in metadata_operation_failed() argument
2472 dm_device_name(pool->pool_md), op, r); in metadata_operation_failed()
2474 abort_transaction(pool); in metadata_operation_failed()
2475 set_pool_mode(pool, PM_READ_ONLY); in metadata_operation_failed()
2490 struct pool *pool = tc->pool; in thin_defer_bio() local
2496 wake_worker(pool); in thin_defer_bio()
2501 struct pool *pool = tc->pool; in thin_defer_bio_with_throttle() local
2503 throttle_lock(&pool->throttle); in thin_defer_bio_with_throttle()
2505 throttle_unlock(&pool->throttle); in thin_defer_bio_with_throttle()
2511 struct pool *pool = tc->pool; in thin_defer_cell() local
2513 throttle_lock(&pool->throttle); in thin_defer_cell()
2517 throttle_unlock(&pool->throttle); in thin_defer_cell()
2519 wake_worker(pool); in thin_defer_cell()
2554 if (get_pool_mode(tc->pool) == PM_FAIL) { in thin_bio_map()
2569 if (bio_detain(tc->pool, &key, bio, &virt_cell)) in thin_bio_map()
2599 if (bio_detain(tc->pool, &key, bio, &data_cell)) { in thin_bio_map()
2604 inc_all_io_entry(tc->pool, bio); in thin_bio_map()
2633 if (get_pool_mode(pt->pool) == PM_OUT_OF_DATA_SPACE) in pool_is_congested()
2640 static void requeue_bios(struct pool *pool) in requeue_bios() argument
2646 list_for_each_entry_rcu(tc, &pool->active_thins, list) { in requeue_bios()
2676 struct pool *pool = pt->pool; in disable_passdown_if_not_supported() local
2688 else if (data_limits->max_discard_sectors < pool->sectors_per_block) in disable_passdown_if_not_supported()
2697 static int bind_control_target(struct pool *pool, struct dm_target *ti) in bind_control_target() argument
2704 enum pool_mode old_mode = get_pool_mode(pool); in bind_control_target()
2714 pool->ti = ti; in bind_control_target()
2715 pool->pf = pt->adjusted_pf; in bind_control_target()
2716 pool->low_water_blocks = pt->low_water_blocks; in bind_control_target()
2718 set_pool_mode(pool, new_mode); in bind_control_target()
2723 static void unbind_control_target(struct pool *pool, struct dm_target *ti) in unbind_control_target() argument
2725 if (pool->ti == ti) in unbind_control_target()
2726 pool->ti = NULL; in unbind_control_target()
2742 static void __pool_destroy(struct pool *pool) in __pool_destroy() argument
2744 __pool_table_remove(pool); in __pool_destroy()
2746 vfree(pool->cell_sort_array); in __pool_destroy()
2747 if (dm_pool_metadata_close(pool->pmd) < 0) in __pool_destroy()
2750 dm_bio_prison_destroy(pool->prison); in __pool_destroy()
2751 dm_kcopyd_client_destroy(pool->copier); in __pool_destroy()
2753 if (pool->wq) in __pool_destroy()
2754 destroy_workqueue(pool->wq); in __pool_destroy()
2756 if (pool->next_mapping) in __pool_destroy()
2757 mempool_free(pool->next_mapping, pool->mapping_pool); in __pool_destroy()
2758 mempool_destroy(pool->mapping_pool); in __pool_destroy()
2759 dm_deferred_set_destroy(pool->shared_read_ds); in __pool_destroy()
2760 dm_deferred_set_destroy(pool->all_io_ds); in __pool_destroy()
2761 kfree(pool); in __pool_destroy()
2766 static struct pool *pool_create(struct mapped_device *pool_md, in pool_create()
2773 struct pool *pool; in pool_create() local
2780 return (struct pool *)pmd; in pool_create()
2783 pool = kmalloc(sizeof(*pool), GFP_KERNEL); in pool_create()
2784 if (!pool) { in pool_create()
2790 pool->pmd = pmd; in pool_create()
2791 pool->sectors_per_block = block_size; in pool_create()
2793 pool->sectors_per_block_shift = -1; in pool_create()
2795 pool->sectors_per_block_shift = __ffs(block_size); in pool_create()
2796 pool->low_water_blocks = 0; in pool_create()
2797 pool_features_init(&pool->pf); in pool_create()
2798 pool->prison = dm_bio_prison_create(); in pool_create()
2799 if (!pool->prison) { in pool_create()
2805 pool->copier = dm_kcopyd_client_create(&dm_kcopyd_throttle); in pool_create()
2806 if (IS_ERR(pool->copier)) { in pool_create()
2807 r = PTR_ERR(pool->copier); in pool_create()
2817 pool->wq = alloc_ordered_workqueue("dm-" DM_MSG_PREFIX, WQ_MEM_RECLAIM); in pool_create()
2818 if (!pool->wq) { in pool_create()
2824 throttle_init(&pool->throttle); in pool_create()
2825 INIT_WORK(&pool->worker, do_worker); in pool_create()
2826 INIT_DELAYED_WORK(&pool->waker, do_waker); in pool_create()
2827 INIT_DELAYED_WORK(&pool->no_space_timeout, do_no_space_timeout); in pool_create()
2828 spin_lock_init(&pool->lock); in pool_create()
2829 bio_list_init(&pool->deferred_flush_bios); in pool_create()
2830 INIT_LIST_HEAD(&pool->prepared_mappings); in pool_create()
2831 INIT_LIST_HEAD(&pool->prepared_discards); in pool_create()
2832 INIT_LIST_HEAD(&pool->active_thins); in pool_create()
2833 pool->low_water_triggered = false; in pool_create()
2834 pool->suspended = true; in pool_create()
2836 pool->shared_read_ds = dm_deferred_set_create(); in pool_create()
2837 if (!pool->shared_read_ds) { in pool_create()
2843 pool->all_io_ds = dm_deferred_set_create(); in pool_create()
2844 if (!pool->all_io_ds) { in pool_create()
2850 pool->next_mapping = NULL; in pool_create()
2851 pool->mapping_pool = mempool_create_slab_pool(MAPPING_POOL_SIZE, in pool_create()
2853 if (!pool->mapping_pool) { in pool_create()
2859 pool->cell_sort_array = vmalloc(sizeof(*pool->cell_sort_array) * CELL_SORT_ARRAY_SIZE); in pool_create()
2860 if (!pool->cell_sort_array) { in pool_create()
2866 pool->ref_count = 1; in pool_create()
2867 pool->last_commit_jiffies = jiffies; in pool_create()
2868 pool->pool_md = pool_md; in pool_create()
2869 pool->md_dev = metadata_dev; in pool_create()
2870 __pool_table_insert(pool); in pool_create()
2872 return pool; in pool_create()
2875 mempool_destroy(pool->mapping_pool); in pool_create()
2877 dm_deferred_set_destroy(pool->all_io_ds); in pool_create()
2879 dm_deferred_set_destroy(pool->shared_read_ds); in pool_create()
2881 destroy_workqueue(pool->wq); in pool_create()
2883 dm_kcopyd_client_destroy(pool->copier); in pool_create()
2885 dm_bio_prison_destroy(pool->prison); in pool_create()
2887 kfree(pool); in pool_create()
2895 static void __pool_inc(struct pool *pool) in __pool_inc() argument
2898 pool->ref_count++; in __pool_inc()
2901 static void __pool_dec(struct pool *pool) in __pool_dec() argument
2904 BUG_ON(!pool->ref_count); in __pool_dec()
2905 if (!--pool->ref_count) in __pool_dec()
2906 __pool_destroy(pool); in __pool_dec()
2909 static struct pool *__pool_find(struct mapped_device *pool_md, in __pool_find()
2914 struct pool *pool = __pool_table_lookup_metadata_dev(metadata_dev); in __pool_find() local
2916 if (pool) { in __pool_find()
2917 if (pool->pool_md != pool_md) { in __pool_find()
2921 __pool_inc(pool); in __pool_find()
2924 pool = __pool_table_lookup(pool_md); in __pool_find()
2925 if (pool) { in __pool_find()
2926 if (pool->md_dev != metadata_dev) { in __pool_find()
2930 __pool_inc(pool); in __pool_find()
2933 pool = pool_create(pool_md, metadata_dev, block_size, read_only, error); in __pool_find()
2938 return pool; in __pool_find()
2950 unbind_control_target(pt->pool, ti); in pool_dtr()
2951 __pool_dec(pt->pool); in pool_dtr()
3011 struct pool *pool = context; in metadata_low_callback() local
3014 dm_device_name(pool->pool_md)); in metadata_low_callback()
3016 dm_table_event(pool->ti->table); in metadata_low_callback()
3087 struct pool *pool; in pool_ctr() local
3155 pool = __pool_find(dm_table_get_md(ti->table), metadata_dev->bdev, in pool_ctr()
3157 if (IS_ERR(pool)) { in pool_ctr()
3158 r = PTR_ERR(pool); in pool_ctr()
3168 if (!pool_created && pf.discard_enabled != pool->pf.discard_enabled) { in pool_ctr()
3174 pt->pool = pool; in pool_ctr()
3200 r = dm_pool_register_metadata_threshold(pt->pool->pmd, in pool_ctr()
3203 pool); in pool_ctr()
3215 __pool_dec(pool); in pool_ctr()
3232 struct pool *pool = pt->pool; in pool_map() local
3238 spin_lock_irqsave(&pool->lock, flags); in pool_map()
3241 spin_unlock_irqrestore(&pool->lock, flags); in pool_map()
3250 struct pool *pool = pt->pool; in maybe_resize_data_dev() local
3256 (void) sector_div(data_size, pool->sectors_per_block); in maybe_resize_data_dev()
3258 r = dm_pool_get_data_dev_size(pool->pmd, &sb_data_size); in maybe_resize_data_dev()
3261 dm_device_name(pool->pool_md)); in maybe_resize_data_dev()
3267 dm_device_name(pool->pool_md), in maybe_resize_data_dev()
3272 if (dm_pool_metadata_needs_check(pool->pmd)) { in maybe_resize_data_dev()
3274 dm_device_name(pool->pool_md)); in maybe_resize_data_dev()
3280 dm_device_name(pool->pool_md), in maybe_resize_data_dev()
3282 r = dm_pool_resize_data_dev(pool->pmd, data_size); in maybe_resize_data_dev()
3284 metadata_operation_failed(pool, "dm_pool_resize_data_dev", r); in maybe_resize_data_dev()
3298 struct pool *pool = pt->pool; in maybe_resize_metadata_dev() local
3303 metadata_dev_size = get_metadata_dev_size_in_blocks(pool->md_dev); in maybe_resize_metadata_dev()
3305 r = dm_pool_get_metadata_dev_size(pool->pmd, &sb_metadata_dev_size); in maybe_resize_metadata_dev()
3308 dm_device_name(pool->pool_md)); in maybe_resize_metadata_dev()
3314 dm_device_name(pool->pool_md), in maybe_resize_metadata_dev()
3319 if (dm_pool_metadata_needs_check(pool->pmd)) { in maybe_resize_metadata_dev()
3321 dm_device_name(pool->pool_md)); in maybe_resize_metadata_dev()
3325 warn_if_metadata_device_too_big(pool->md_dev); in maybe_resize_metadata_dev()
3327 dm_device_name(pool->pool_md), in maybe_resize_metadata_dev()
3329 r = dm_pool_resize_metadata_dev(pool->pmd, metadata_dev_size); in maybe_resize_metadata_dev()
3331 metadata_operation_failed(pool, "dm_pool_resize_metadata_dev", r); in maybe_resize_metadata_dev()
3357 struct pool *pool = pt->pool; in pool_preresume() local
3362 r = bind_control_target(pool, ti); in pool_preresume()
3375 (void) commit(pool); in pool_preresume()
3380 static void pool_suspend_active_thins(struct pool *pool) in pool_suspend_active_thins() argument
3385 tc = get_first_thin(pool); in pool_suspend_active_thins()
3388 tc = get_next_thin(pool, tc); in pool_suspend_active_thins()
3392 static void pool_resume_active_thins(struct pool *pool) in pool_resume_active_thins() argument
3397 tc = get_first_thin(pool); in pool_resume_active_thins()
3400 tc = get_next_thin(pool, tc); in pool_resume_active_thins()
3407 struct pool *pool = pt->pool; in pool_resume() local
3414 requeue_bios(pool); in pool_resume()
3415 pool_resume_active_thins(pool); in pool_resume()
3417 spin_lock_irqsave(&pool->lock, flags); in pool_resume()
3418 pool->low_water_triggered = false; in pool_resume()
3419 pool->suspended = false; in pool_resume()
3420 spin_unlock_irqrestore(&pool->lock, flags); in pool_resume()
3422 do_waker(&pool->waker.work); in pool_resume()
3428 struct pool *pool = pt->pool; in pool_presuspend() local
3431 spin_lock_irqsave(&pool->lock, flags); in pool_presuspend()
3432 pool->suspended = true; in pool_presuspend()
3433 spin_unlock_irqrestore(&pool->lock, flags); in pool_presuspend()
3435 pool_suspend_active_thins(pool); in pool_presuspend()
3441 struct pool *pool = pt->pool; in pool_presuspend_undo() local
3444 pool_resume_active_thins(pool); in pool_presuspend_undo()
3446 spin_lock_irqsave(&pool->lock, flags); in pool_presuspend_undo()
3447 pool->suspended = false; in pool_presuspend_undo()
3448 spin_unlock_irqrestore(&pool->lock, flags); in pool_presuspend_undo()
3454 struct pool *pool = pt->pool; in pool_postsuspend() local
3456 cancel_delayed_work_sync(&pool->waker); in pool_postsuspend()
3457 cancel_delayed_work_sync(&pool->no_space_timeout); in pool_postsuspend()
3458 flush_workqueue(pool->wq); in pool_postsuspend()
3459 (void) commit(pool); in pool_postsuspend()
3485 static int process_create_thin_mesg(unsigned argc, char **argv, struct pool *pool) in process_create_thin_mesg() argument
3498 r = dm_pool_create_thin(pool->pmd, dev_id); in process_create_thin_mesg()
3508 static int process_create_snap_mesg(unsigned argc, char **argv, struct pool *pool) in process_create_snap_mesg() argument
3526 r = dm_pool_create_snap(pool->pmd, dev_id, origin_dev_id); in process_create_snap_mesg()
3536 static int process_delete_mesg(unsigned argc, char **argv, struct pool *pool) in process_delete_mesg() argument
3549 r = dm_pool_delete_thin_device(pool->pmd, dev_id); in process_delete_mesg()
3556 static int process_set_transaction_id_mesg(unsigned argc, char **argv, struct pool *pool) in process_set_transaction_id_mesg() argument
3575 r = dm_pool_set_metadata_transaction_id(pool->pmd, old_id, new_id); in process_set_transaction_id_mesg()
3585 static int process_reserve_metadata_snap_mesg(unsigned argc, char **argv, struct pool *pool) in process_reserve_metadata_snap_mesg() argument
3593 (void) commit(pool); in process_reserve_metadata_snap_mesg()
3595 r = dm_pool_reserve_metadata_snap(pool->pmd); in process_reserve_metadata_snap_mesg()
3602 static int process_release_metadata_snap_mesg(unsigned argc, char **argv, struct pool *pool) in process_release_metadata_snap_mesg() argument
3610 r = dm_pool_release_metadata_snap(pool->pmd); in process_release_metadata_snap_mesg()
3630 struct pool *pool = pt->pool; in pool_message() local
3632 if (get_pool_mode(pool) >= PM_READ_ONLY) { in pool_message()
3634 dm_device_name(pool->pool_md)); in pool_message()
3639 r = process_create_thin_mesg(argc, argv, pool); in pool_message()
3642 r = process_create_snap_mesg(argc, argv, pool); in pool_message()
3645 r = process_delete_mesg(argc, argv, pool); in pool_message()
3648 r = process_set_transaction_id_mesg(argc, argv, pool); in pool_message()
3651 r = process_reserve_metadata_snap_mesg(argc, argv, pool); in pool_message()
3654 r = process_release_metadata_snap_mesg(argc, argv, pool); in pool_message()
3660 (void) commit(pool); in pool_message()
3709 struct pool *pool = pt->pool; in pool_status() local
3713 if (get_pool_mode(pool) == PM_FAIL) { in pool_status()
3720 (void) commit(pool); in pool_status()
3722 r = dm_pool_get_metadata_transaction_id(pool->pmd, &transaction_id); in pool_status()
3725 dm_device_name(pool->pool_md), r); in pool_status()
3729 r = dm_pool_get_free_metadata_block_count(pool->pmd, &nr_free_blocks_metadata); in pool_status()
3732 dm_device_name(pool->pool_md), r); in pool_status()
3736 r = dm_pool_get_metadata_dev_size(pool->pmd, &nr_blocks_metadata); in pool_status()
3739 dm_device_name(pool->pool_md), r); in pool_status()
3743 r = dm_pool_get_free_block_count(pool->pmd, &nr_free_blocks_data); in pool_status()
3746 dm_device_name(pool->pool_md), r); in pool_status()
3750 r = dm_pool_get_data_dev_size(pool->pmd, &nr_blocks_data); in pool_status()
3753 dm_device_name(pool->pool_md), r); in pool_status()
3757 r = dm_pool_get_metadata_snap(pool->pmd, &held_root); in pool_status()
3760 dm_device_name(pool->pool_md), r); in pool_status()
3776 if (pool->pf.mode == PM_OUT_OF_DATA_SPACE) in pool_status()
3778 else if (pool->pf.mode == PM_READ_ONLY) in pool_status()
3783 if (!pool->pf.discard_enabled) in pool_status()
3785 else if (pool->pf.discard_passdown) in pool_status()
3790 if (pool->pf.error_if_no_space) in pool_status()
3795 if (dm_pool_metadata_needs_check(pool->pmd)) in pool_status()
3806 (unsigned long)pool->sectors_per_block, in pool_status()
3828 struct pool *pool = pt->pool; in pool_io_hints() local
3840 if (limits->max_sectors < pool->sectors_per_block) { in pool_io_hints()
3841 while (!is_factor(pool->sectors_per_block, limits->max_sectors)) { in pool_io_hints()
3852 if (io_opt_sectors < pool->sectors_per_block || in pool_io_hints()
3853 !is_factor(io_opt_sectors, pool->sectors_per_block)) { in pool_io_hints()
3854 if (is_factor(pool->sectors_per_block, limits->max_sectors)) in pool_io_hints()
3857 blk_limits_io_min(limits, pool->sectors_per_block << SECTOR_SHIFT); in pool_io_hints()
3858 blk_limits_io_opt(limits, pool->sectors_per_block << SECTOR_SHIFT); in pool_io_hints()
3924 spin_lock_irqsave(&tc->pool->lock, flags); in thin_dtr()
3926 spin_unlock_irqrestore(&tc->pool->lock, flags); in thin_dtr()
3934 __pool_dec(tc->pool); in thin_dtr()
4014 tc->pool = __pool_table_lookup(pool_md); in thin_ctr()
4015 if (!tc->pool) { in thin_ctr()
4020 __pool_inc(tc->pool); in thin_ctr()
4022 if (get_pool_mode(tc->pool) == PM_FAIL) { in thin_ctr()
4028 r = dm_pool_open_thin_device(tc->pool->pmd, tc->dev_id, &tc->td); in thin_ctr()
4034 r = dm_set_target_max_io_len(ti, tc->pool->sectors_per_block); in thin_ctr()
4044 if (tc->pool->pf.discard_enabled) { in thin_ctr()
4052 spin_lock_irqsave(&tc->pool->lock, flags); in thin_ctr()
4053 if (tc->pool->suspended) { in thin_ctr()
4054 spin_unlock_irqrestore(&tc->pool->lock, flags); in thin_ctr()
4062 list_add_tail_rcu(&tc->list, &tc->pool->active_thins); in thin_ctr()
4063 spin_unlock_irqrestore(&tc->pool->lock, flags); in thin_ctr()
4079 __pool_dec(tc->pool); in thin_ctr()
4108 struct pool *pool = h->tc->pool; in thin_endio() local
4114 spin_lock_irqsave(&pool->lock, flags); in thin_endio()
4119 spin_unlock_irqrestore(&pool->lock, flags); in thin_endio()
4126 spin_lock_irqsave(&pool->lock, flags); in thin_endio()
4128 list_add_tail(&m->list, &pool->prepared_discards); in thin_endio()
4129 spin_unlock_irqrestore(&pool->lock, flags); in thin_endio()
4130 wake_worker(pool); in thin_endio()
4181 if (get_pool_mode(tc->pool) == PM_FAIL) { in thin_status()
4203 DMEMIT("%llu ", mapped * tc->pool->sectors_per_block); in thin_status()
4206 tc->pool->sectors_per_block) - 1); in thin_status()
4232 struct pool *pool = tc->pool; in thin_iterate_devices() local
4238 if (!pool->ti) in thin_iterate_devices()
4241 blocks = pool->ti->len; in thin_iterate_devices()
4242 (void) sector_div(blocks, pool->sectors_per_block); in thin_iterate_devices()
4244 return fn(ti, tc->pool_dev, 0, pool->sectors_per_block * blocks, data); in thin_iterate_devices()
4252 struct pool *pool = tc->pool; in thin_io_hints() local
4254 if (!pool->pf.discard_enabled) in thin_io_hints()
4257 limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT; in thin_io_hints()