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-rw-r--r--fs/btrfs/raid-stripe-tree.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/fs/btrfs/raid-stripe-tree.h b/fs/btrfs/raid-stripe-tree.h
new file mode 100644
index 0000000000..cdb58b38fc
--- /dev/null
+++ b/fs/btrfs/raid-stripe-tree.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 Western Digital Corporation or its affiliates.
+ */
+
+#ifndef BTRFS_RAID_STRIPE_TREE_H
+#define BTRFS_RAID_STRIPE_TREE_H
+
+#define BTRFS_RST_SUPP_BLOCK_GROUP_MASK (BTRFS_BLOCK_GROUP_DUP | \
+ BTRFS_BLOCK_GROUP_RAID1_MASK | \
+ BTRFS_BLOCK_GROUP_RAID0 | \
+ BTRFS_BLOCK_GROUP_RAID10)
+
+struct btrfs_io_context;
+struct btrfs_io_stripe;
+struct btrfs_ordered_extent;
+struct btrfs_trans_handle;
+
+int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 length);
+int btrfs_get_raid_extent_offset(struct btrfs_fs_info *fs_info,
+ u64 logical, u64 *length, u64 map_type,
+ u32 stripe_index, struct btrfs_io_stripe *stripe);
+int btrfs_insert_raid_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_ordered_extent *ordered_extent);
+
+static inline bool btrfs_need_stripe_tree_update(struct btrfs_fs_info *fs_info,
+ u64 map_type)
+{
+ u64 type = map_type & BTRFS_BLOCK_GROUP_TYPE_MASK;
+ u64 profile = map_type & BTRFS_BLOCK_GROUP_PROFILE_MASK;
+
+ if (!btrfs_fs_incompat(fs_info, RAID_STRIPE_TREE))
+ return false;
+
+ if (type != BTRFS_BLOCK_GROUP_DATA)
+ return false;
+
+ if (profile & BTRFS_RST_SUPP_BLOCK_GROUP_MASK)
+ return true;
+
+ return false;
+}
+
+static inline int btrfs_num_raid_stripes(u32 item_size)
+{
+ return (item_size - offsetof(struct btrfs_stripe_extent, strides)) /
+ sizeof(struct btrfs_raid_stride);
+}
+
+#endif