Lines Matching refs:bdi
46 bdi_debug_root = debugfs_create_dir("bdi", NULL);
51 struct backing_dev_info *bdi = m->private;
52 struct bdi_writeback *wb = &bdi->wb;
102 !list_empty(&bdi->bdi_list), bdi->wb.state);
108 static void bdi_debug_register(struct backing_dev_info *bdi, const char *name)
110 bdi->debug_dir = debugfs_create_dir(name, bdi_debug_root);
112 debugfs_create_file("stats", 0444, bdi->debug_dir, bdi,
116 static void bdi_debug_unregister(struct backing_dev_info *bdi)
118 debugfs_remove_recursive(bdi->debug_dir);
124 static inline void bdi_debug_register(struct backing_dev_info *bdi,
128 static inline void bdi_debug_unregister(struct backing_dev_info *bdi)
137 struct backing_dev_info *bdi = dev_get_drvdata(dev);
145 bdi->ra_pages = read_ahead_kb >> (PAGE_SHIFT - 10);
154 struct backing_dev_info *bdi = dev_get_drvdata(dev); \
160 BDI_SHOW(read_ahead_kb, K(bdi->ra_pages))
165 struct backing_dev_info *bdi = dev_get_drvdata(dev);
173 ret = bdi_set_min_ratio(bdi, ratio);
179 BDI_SHOW(min_ratio, bdi->min_ratio / BDI_RATIO_SCALE)
184 struct backing_dev_info *bdi = dev_get_drvdata(dev);
192 ret = bdi_set_min_ratio_no_scale(bdi, ratio);
198 BDI_SHOW(min_ratio_fine, bdi->min_ratio)
203 struct backing_dev_info *bdi = dev_get_drvdata(dev);
211 ret = bdi_set_max_ratio(bdi, ratio);
217 BDI_SHOW(max_ratio, bdi->max_ratio / BDI_RATIO_SCALE)
222 struct backing_dev_info *bdi = dev_get_drvdata(dev);
230 ret = bdi_set_max_ratio_no_scale(bdi, ratio);
236 BDI_SHOW(max_ratio_fine, bdi->max_ratio)
242 struct backing_dev_info *bdi = dev_get_drvdata(dev);
244 return sysfs_emit(buf, "%llu\n", bdi_get_min_bytes(bdi));
250 struct backing_dev_info *bdi = dev_get_drvdata(dev);
258 ret = bdi_set_min_bytes(bdi, bytes);
270 struct backing_dev_info *bdi = dev_get_drvdata(dev);
272 return sysfs_emit(buf, "%llu\n", bdi_get_max_bytes(bdi));
278 struct backing_dev_info *bdi = dev_get_drvdata(dev);
286 ret = bdi_set_max_bytes(bdi, bytes);
307 struct backing_dev_info *bdi = dev_get_drvdata(dev);
315 ret = bdi_set_strict_limit(bdi, strict_limit);
325 struct backing_dev_info *bdi = dev_get_drvdata(dev);
328 !!(bdi->capabilities & BDI_CAP_STRICTLIMIT));
347 .name = "bdi",
377 * wakes-up the corresponding bdi thread which should then take care of the
380 * set up a timer which wakes the bdi thread up later.
413 static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi,
420 wb->bdi = bdi;
462 * Remove bdi from the global list and shutdown any threads we have running
503 * cgwb_lock protects bdi->cgwb_tree, blkcg->cgwb_list, offline_cgwbs and
504 * memcg->cgwb_list. bdi->cgwb_tree is also RCU protected.
526 struct backing_dev_info *bdi = wb->bdi;
528 mutex_lock(&wb->bdi->cgwb_release_mutex);
533 mutex_unlock(&wb->bdi->cgwb_release_mutex);
545 bdi_put(bdi);
561 WARN_ON(!radix_tree_delete(&wb->bdi->cgwb_tree, wb->memcg_css->id));
575 static int cgwb_create(struct backing_dev_info *bdi,
592 wb = radix_tree_lookup(&bdi->cgwb_tree, memcg_css->id);
608 ret = wb_init(wb, bdi, gfp);
625 bdi_get(bdi);
628 * The root wb determines the registered state of the whole bdi and
635 if (test_bit(WB_registered, &bdi->wb.state) &&
638 ret = radix_tree_insert(&bdi->cgwb_tree, memcg_css->id, wb);
640 list_add_tail_rcu(&wb->bdi_node, &bdi->wb_list);
657 bdi_put(bdi);
672 * @bdi: target bdi
675 * Try to get the wb for @memcg_css on @bdi. The returned wb has its
693 struct bdi_writeback *wb_get_lookup(struct backing_dev_info *bdi,
699 return &bdi->wb;
702 wb = radix_tree_lookup(&bdi->cgwb_tree, memcg_css->id);
719 * @bdi: target bdi
723 * Try to get the wb for @memcg_css on @bdi. If it doesn't exist, try to
726 struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
735 wb = wb_get_lookup(bdi, memcg_css);
736 } while (!wb && !cgwb_create(bdi, memcg_css, gfp));
741 static int cgwb_bdi_init(struct backing_dev_info *bdi)
745 INIT_RADIX_TREE(&bdi->cgwb_tree, GFP_ATOMIC);
746 mutex_init(&bdi->cgwb_release_mutex);
747 init_rwsem(&bdi->wb_switch_rwsem);
749 ret = wb_init(&bdi->wb, bdi, GFP_KERNEL);
751 bdi->wb.memcg_css = &root_mem_cgroup->css;
752 bdi->wb.blkcg_css = blkcg_root_css;
757 static void cgwb_bdi_unregister(struct backing_dev_info *bdi)
763 WARN_ON(test_bit(WB_registered, &bdi->wb.state));
766 radix_tree_for_each_slot(slot, &bdi->cgwb_tree, &iter, 0)
770 mutex_lock(&bdi->cgwb_release_mutex);
772 while (!list_empty(&bdi->wb_list)) {
773 wb = list_first_entry(&bdi->wb_list, struct bdi_writeback,
780 mutex_unlock(&bdi->cgwb_release_mutex);
869 static void cgwb_bdi_register(struct backing_dev_info *bdi)
872 list_add_tail_rcu(&bdi->wb.bdi_node, &bdi->wb_list);
893 static int cgwb_bdi_init(struct backing_dev_info *bdi)
895 return wb_init(&bdi->wb, bdi, GFP_KERNEL);
898 static void cgwb_bdi_unregister(struct backing_dev_info *bdi) { }
900 static void cgwb_bdi_register(struct backing_dev_info *bdi)
902 list_add_tail_rcu(&bdi->wb.bdi_node, &bdi->wb_list);
912 int bdi_init(struct backing_dev_info *bdi)
914 bdi->dev = NULL;
916 kref_init(&bdi->refcnt);
917 bdi->min_ratio = 0;
918 bdi->max_ratio = 100 * BDI_RATIO_SCALE;
919 bdi->max_prop_frac = FPROP_FRAC_BASE;
920 INIT_LIST_HEAD(&bdi->bdi_list);
921 INIT_LIST_HEAD(&bdi->wb_list);
922 init_waitqueue_head(&bdi->wb_waitq);
923 bdi->last_bdp_sleep = jiffies;
925 return cgwb_bdi_init(bdi);
930 struct backing_dev_info *bdi;
932 bdi = kzalloc_node(sizeof(*bdi), GFP_KERNEL, node_id);
933 if (!bdi)
936 if (bdi_init(bdi)) {
937 kfree(bdi);
940 bdi->capabilities = BDI_CAP_WRITEBACK | BDI_CAP_WRITEBACK_ACCT;
941 bdi->ra_pages = VM_READAHEAD_PAGES;
942 bdi->io_pages = VM_READAHEAD_PAGES;
943 timer_setup(&bdi->laptop_mode_wb_timer, laptop_mode_timer_fn, 0);
944 return bdi;
952 struct backing_dev_info *bdi;
958 bdi = rb_entry(parent, struct backing_dev_info, rb_node);
960 if (bdi->id > id)
962 else if (bdi->id < id)
974 * bdi_get_by_id - lookup and get bdi from its id
975 * @id: bdi id to lookup
977 * Find bdi matching @id and get it. Returns NULL if the matching bdi
982 struct backing_dev_info *bdi = NULL;
988 bdi = rb_entry(*p, struct backing_dev_info, rb_node);
989 bdi_get(bdi);
993 return bdi;
996 int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args)
1001 if (bdi->dev) /* The driver needs to use separate queues per device */
1004 vsnprintf(bdi->dev_name, sizeof(bdi->dev_name), fmt, args);
1005 dev = device_create(&bdi_class, NULL, MKDEV(0, 0), bdi, bdi->dev_name);
1009 cgwb_bdi_register(bdi);
1010 bdi->dev = dev;
1012 bdi_debug_register(bdi, dev_name(dev));
1013 set_bit(WB_registered, &bdi->wb.state);
1017 bdi->id = ++bdi_id_cursor;
1019 p = bdi_lookup_rb_node(bdi->id, &parent);
1020 rb_link_node(&bdi->rb_node, parent, p);
1021 rb_insert_color(&bdi->rb_node, &bdi_tree);
1023 list_add_tail_rcu(&bdi->bdi_list, &bdi_list);
1027 trace_writeback_bdi_register(bdi);
1031 int bdi_register(struct backing_dev_info *bdi, const char *fmt, ...)
1037 ret = bdi_register_va(bdi, fmt, args);
1043 void bdi_set_owner(struct backing_dev_info *bdi, struct device *owner)
1045 WARN_ON_ONCE(bdi->owner);
1046 bdi->owner = owner;
1051 * Remove bdi from bdi_list, and ensure that it is no longer visible
1053 static void bdi_remove_from_list(struct backing_dev_info *bdi)
1056 rb_erase(&bdi->rb_node, &bdi_tree);
1057 list_del_rcu(&bdi->bdi_list);
1063 void bdi_unregister(struct backing_dev_info *bdi)
1065 del_timer_sync(&bdi->laptop_mode_wb_timer);
1068 bdi_remove_from_list(bdi);
1069 wb_shutdown(&bdi->wb);
1070 cgwb_bdi_unregister(bdi);
1076 if (bdi->min_ratio)
1077 bdi_set_min_ratio(bdi, 0);
1079 if (bdi->dev) {
1080 bdi_debug_unregister(bdi);
1081 device_unregister(bdi->dev);
1082 bdi->dev = NULL;
1085 if (bdi->owner) {
1086 put_device(bdi->owner);
1087 bdi->owner = NULL;
1094 struct backing_dev_info *bdi =
1097 WARN_ON_ONCE(test_bit(WB_registered, &bdi->wb.state));
1098 WARN_ON_ONCE(bdi->dev);
1099 wb_exit(&bdi->wb);
1100 kfree(bdi);
1103 void bdi_put(struct backing_dev_info *bdi)
1105 kref_put(&bdi->refcnt, release_bdi);
1119 return I_BDEV(inode)->bd_disk->bdi;
1125 const char *bdi_dev_name(struct backing_dev_info *bdi)
1127 if (!bdi || !bdi->dev)
1129 return bdi->dev_name;