diff options
Diffstat (limited to 'fs/btrfs/extent-tree.h')
| -rw-r--r-- | fs/btrfs/extent-tree.h | 151 |
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 |