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53 lines
1.7 KiB
53 lines
1.7 KiB
// 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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