111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2008 Oracle. All rights reserved.
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*/
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#ifndef BTRFS_TREE_LOG_H
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#define BTRFS_TREE_LOG_H
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#include "messages.h"
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#include "ctree.h"
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#include "transaction.h"
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/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
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#define BTRFS_NO_LOG_SYNC 256
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/*
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* We can't use the tree log for whatever reason, force a transaction commit.
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* We use a negative value because there are functions through the logging code
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* that need to return an error (< 0 value), false (0) or true (1). Any negative
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* value will do, as it will cause the log to be marked for a full sync.
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*/
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#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
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struct btrfs_log_ctx {
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int log_ret;
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int log_transid;
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bool log_new_dentries;
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bool logging_new_name;
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bool logging_new_delayed_dentries;
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/* Indicate if the inode being logged was logged before. */
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bool logged_before;
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struct inode *inode;
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struct list_head list;
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/* Only used for fast fsyncs. */
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struct list_head ordered_extents;
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struct list_head conflict_inodes;
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int num_conflict_inodes;
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bool logging_conflict_inodes;
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};
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static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
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struct inode *inode)
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{
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ctx->log_ret = 0;
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ctx->log_transid = 0;
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ctx->log_new_dentries = false;
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ctx->logging_new_name = false;
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ctx->logging_new_delayed_dentries = false;
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ctx->logged_before = false;
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ctx->inode = inode;
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INIT_LIST_HEAD(&ctx->list);
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INIT_LIST_HEAD(&ctx->ordered_extents);
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INIT_LIST_HEAD(&ctx->conflict_inodes);
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ctx->num_conflict_inodes = 0;
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ctx->logging_conflict_inodes = false;
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}
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static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
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{
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struct btrfs_ordered_extent *ordered;
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struct btrfs_ordered_extent *tmp;
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ASSERT(inode_is_locked(ctx->inode));
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list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
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list_del_init(&ordered->log_list);
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btrfs_put_ordered_extent(ordered);
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}
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}
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static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
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{
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WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
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}
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static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
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{
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return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
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trans->transid;
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}
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int btrfs_sync_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct btrfs_log_ctx *ctx);
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int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
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int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_recover_log_trees(struct btrfs_root *tree_root);
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int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
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struct dentry *dentry,
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struct btrfs_log_ctx *ctx);
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void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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const struct fscrypt_str *name,
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struct btrfs_inode *dir, u64 index);
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void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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const struct fscrypt_str *name,
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struct btrfs_inode *inode, u64 dirid);
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void btrfs_end_log_trans(struct btrfs_root *root);
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void btrfs_pin_log_trans(struct btrfs_root *root);
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void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
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struct btrfs_inode *dir, struct btrfs_inode *inode,
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bool for_rename);
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void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
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struct btrfs_inode *dir);
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void btrfs_log_new_name(struct btrfs_trans_handle *trans,
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struct dentry *old_dentry, struct btrfs_inode *old_dir,
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u64 old_dir_index, struct dentry *parent);
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#endif
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