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-rw-r--r--fs/btrfs/extent-tree.h151
1 files changed, 151 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.h b/fs/btrfs/extent-tree.h
new file mode 100644
index 0000000000..88c249c375
--- /dev/null
+++ b/fs/btrfs/extent-tree.h
@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef BTRFS_EXTENT_TREE_H
+#define BTRFS_EXTENT_TREE_H
+
+#include "misc.h"
+#include "block-group.h"
+
+struct btrfs_free_cluster;
+
+enum btrfs_extent_allocation_policy {
+ BTRFS_EXTENT_ALLOC_CLUSTERED,
+ BTRFS_EXTENT_ALLOC_ZONED,
+};
+
+struct find_free_extent_ctl {
+ /* Basic allocation info */
+ u64 ram_bytes;
+ u64 num_bytes;
+ u64 min_alloc_size;
+ u64 empty_size;
+ u64 flags;
+ int delalloc;
+
+ /* Where to start the search inside the bg */
+ u64 search_start;
+
+ /* For clustered allocation */
+ u64 empty_cluster;
+ struct btrfs_free_cluster *last_ptr;
+ bool use_cluster;
+
+ bool have_caching_bg;
+ bool orig_have_caching_bg;
+
+ /* Allocation is called for tree-log */
+ bool for_treelog;
+
+ /* Allocation is called for data relocation */
+ bool for_data_reloc;
+
+ /* RAID index, converted from flags */
+ int index;
+
+ /*
+ * Current loop number, check find_free_extent_update_loop() for details
+ */
+ int loop;
+
+ /*
+ * Set to true if we're retrying the allocation on this block group
+ * after waiting for caching progress, this is so that we retry only
+ * once before moving on to another block group.
+ */
+ bool retry_uncached;
+
+ /* If current block group is cached */
+ int cached;
+
+ /* Max contiguous hole found */
+ u64 max_extent_size;
+
+ /* Total free space from free space cache, not always contiguous */
+ u64 total_free_space;
+
+ /* Found result */
+ u64 found_offset;
+
+ /* Hint where to start looking for an empty space */
+ u64 hint_byte;
+
+ /* Allocation policy */
+ enum btrfs_extent_allocation_policy policy;
+
+ /* Whether or not the allocator is currently following a hint */
+ bool hinted;
+
+ /* Size class of block groups to prefer in early loops */
+ enum btrfs_block_group_size_class size_class;
+};
+
+enum btrfs_inline_ref_type {
+ BTRFS_REF_TYPE_INVALID,
+ BTRFS_REF_TYPE_BLOCK,
+ BTRFS_REF_TYPE_DATA,
+ BTRFS_REF_TYPE_ANY,
+};
+
+int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
+ struct btrfs_extent_inline_ref *iref,
+ enum btrfs_inline_ref_type is_data);
+u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
+
+int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, unsigned long count);
+void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
+ struct btrfs_delayed_ref_root *delayed_refs,
+ struct btrfs_delayed_ref_head *head);
+int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
+int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info, u64 bytenr,
+ u64 offset, int metadata, u64 *refs, u64 *flags);
+int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
+ int reserved);
+int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
+ u64 bytenr, u64 num_bytes);
+int btrfs_exclude_logged_extents(struct extent_buffer *eb);
+int btrfs_cross_ref_exist(struct btrfs_root *root,
+ u64 objectid, u64 offset, u64 bytenr, bool strict,
+ struct btrfs_path *path);
+struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 parent, u64 root_objectid,
+ const struct btrfs_disk_key *key,
+ int level, u64 hint,
+ u64 empty_size,
+ enum btrfs_lock_nesting nest);
+void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
+ u64 root_id,
+ struct extent_buffer *buf,
+ u64 parent, int last_ref);
+int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 owner,
+ u64 offset, u64 ram_bytes,
+ struct btrfs_key *ins);
+int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
+ u64 root_objectid, u64 owner, u64 offset,
+ struct btrfs_key *ins);
+int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
+ u64 min_alloc_size, u64 empty_size, u64 hint_byte,
+ struct btrfs_key *ins, int is_data, int delalloc);
+int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+ struct extent_buffer *buf, int full_backref);
+int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+ struct extent_buffer *buf, int full_backref);
+int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
+ struct extent_buffer *eb, u64 flags);
+int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
+
+int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
+ u64 start, u64 len, int delalloc);
+int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, u64 len);
+int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
+int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_ref *generic_ref);
+int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
+ int for_reloc);
+int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct extent_buffer *node,
+ struct extent_buffer *parent);
+
+#endif