54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#ifndef BTRFS_TREE_MOD_LOG_H
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#define BTRFS_TREE_MOD_LOG_H
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#include "ctree.h"
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/* Represents a tree mod log user. */
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struct btrfs_seq_list {
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struct list_head list;
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u64 seq;
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};
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#define BTRFS_SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
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#define BTRFS_SEQ_LAST ((u64)-1)
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enum btrfs_mod_log_op {
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BTRFS_MOD_LOG_KEY_REPLACE,
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BTRFS_MOD_LOG_KEY_ADD,
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BTRFS_MOD_LOG_KEY_REMOVE,
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BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING,
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BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING,
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BTRFS_MOD_LOG_MOVE_KEYS,
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BTRFS_MOD_LOG_ROOT_REPLACE,
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};
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u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
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struct btrfs_seq_list *elem);
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void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
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struct btrfs_seq_list *elem);
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int btrfs_tree_mod_log_insert_root(struct extent_buffer *old_root,
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struct extent_buffer *new_root,
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bool log_removal);
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int btrfs_tree_mod_log_insert_key(struct extent_buffer *eb, int slot,
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enum btrfs_mod_log_op op, gfp_t flags);
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int btrfs_tree_mod_log_free_eb(struct extent_buffer *eb);
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struct extent_buffer *btrfs_tree_mod_log_rewind(struct btrfs_fs_info *fs_info,
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struct btrfs_path *path,
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struct extent_buffer *eb,
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u64 time_seq);
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struct extent_buffer *btrfs_get_old_root(struct btrfs_root *root, u64 time_seq);
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int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
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int btrfs_tree_mod_log_eb_copy(struct extent_buffer *dst,
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struct extent_buffer *src,
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unsigned long dst_offset,
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unsigned long src_offset,
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int nr_items);
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int btrfs_tree_mod_log_insert_move(struct extent_buffer *eb,
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int dst_slot, int src_slot,
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int nr_items);
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u64 btrfs_tree_mod_log_lowest_seq(struct btrfs_fs_info *fs_info);
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#endif
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