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-rw-r--r--fs/btrfs/discard.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/btrfs/discard.h b/fs/btrfs/discard.h
new file mode 100644
index 000000000000..21a15776dac4
--- /dev/null
+++ b/fs/btrfs/discard.h
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#ifndef BTRFS_DISCARD_H
+#define BTRFS_DISCARD_H
+
+#include <linux/sizes.h>
+
+struct btrfs_fs_info;
+struct btrfs_discard_ctl;
+struct btrfs_block_group;
+
+/* Discard size limits */
+#define BTRFS_ASYNC_DISCARD_DEFAULT_MAX_SIZE (SZ_64M)
+#define BTRFS_ASYNC_DISCARD_MAX_FILTER (SZ_1M)
+#define BTRFS_ASYNC_DISCARD_MIN_FILTER (SZ_32K)
+
+/* List operations */
+void btrfs_discard_check_filter(struct btrfs_block_group *block_group, u64 bytes);
+
+/* Work operations */
+void btrfs_discard_cancel_work(struct btrfs_discard_ctl *discard_ctl,
+ struct btrfs_block_group *block_group);
+void btrfs_discard_queue_work(struct btrfs_discard_ctl *discard_ctl,
+ struct btrfs_block_group *block_group);
+void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
+ bool override);
+bool btrfs_run_discard_work(struct btrfs_discard_ctl *discard_ctl);
+
+/* Update operations */
+void btrfs_discard_calc_delay(struct btrfs_discard_ctl *discard_ctl);
+void btrfs_discard_update_discardable(struct btrfs_block_group *block_group,
+ struct btrfs_free_space_ctl *ctl);
+
+/* Setup/cleanup operations */
+void btrfs_discard_punt_unused_bgs_list(struct btrfs_fs_info *fs_info);
+void btrfs_discard_resume(struct btrfs_fs_info *fs_info);
+void btrfs_discard_stop(struct btrfs_fs_info *fs_info);
+void btrfs_discard_init(struct btrfs_fs_info *fs_info);
+void btrfs_discard_cleanup(struct btrfs_fs_info *fs_info);
+
+#endif