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-rw-r--r--fs/btrfs/tree-log.h110
1 files changed, 110 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h
new file mode 100644
index 0000000000..a550a8a375
--- /dev/null
+++ b/fs/btrfs/tree-log.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Oracle. All rights reserved.
+ */
+
+#ifndef BTRFS_TREE_LOG_H
+#define BTRFS_TREE_LOG_H
+
+#include "messages.h"
+#include "ctree.h"
+#include "transaction.h"
+
+/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
+#define BTRFS_NO_LOG_SYNC 256
+
+/*
+ * We can't use the tree log for whatever reason, force a transaction commit.
+ * We use a negative value because there are functions through the logging code
+ * that need to return an error (< 0 value), false (0) or true (1). Any negative
+ * value will do, as it will cause the log to be marked for a full sync.
+ */
+#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
+
+struct btrfs_log_ctx {
+ int log_ret;
+ int log_transid;
+ bool log_new_dentries;
+ bool logging_new_name;
+ bool logging_new_delayed_dentries;
+ /* Indicate if the inode being logged was logged before. */
+ bool logged_before;
+ struct inode *inode;
+ struct list_head list;
+ /* Only used for fast fsyncs. */
+ struct list_head ordered_extents;
+ struct list_head conflict_inodes;
+ int num_conflict_inodes;
+ bool logging_conflict_inodes;
+};
+
+static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
+ struct inode *inode)
+{
+ ctx->log_ret = 0;
+ ctx->log_transid = 0;
+ ctx->log_new_dentries = false;
+ ctx->logging_new_name = false;
+ ctx->logging_new_delayed_dentries = false;
+ ctx->logged_before = false;
+ ctx->inode = inode;
+ INIT_LIST_HEAD(&ctx->list);
+ INIT_LIST_HEAD(&ctx->ordered_extents);
+ INIT_LIST_HEAD(&ctx->conflict_inodes);
+ ctx->num_conflict_inodes = 0;
+ ctx->logging_conflict_inodes = false;
+}
+
+static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
+{
+ struct btrfs_ordered_extent *ordered;
+ struct btrfs_ordered_extent *tmp;
+
+ ASSERT(inode_is_locked(ctx->inode));
+
+ list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
+ list_del_init(&ordered->log_list);
+ btrfs_put_ordered_extent(ordered);
+ }
+}
+
+static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
+{
+ WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
+}
+
+static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
+{
+ return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
+ trans->transid;
+}
+
+int btrfs_sync_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_log_ctx *ctx);
+int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
+int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
+int btrfs_recover_log_trees(struct btrfs_root *tree_root);
+int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
+ struct dentry *dentry,
+ struct btrfs_log_ctx *ctx);
+void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const struct fscrypt_str *name,
+ struct btrfs_inode *dir, u64 index);
+void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const struct fscrypt_str *name,
+ struct btrfs_inode *inode, u64 dirid);
+void btrfs_end_log_trans(struct btrfs_root *root);
+void btrfs_pin_log_trans(struct btrfs_root *root);
+void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *dir, struct btrfs_inode *inode,
+ bool for_rename);
+void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
+ struct btrfs_inode *dir);
+void btrfs_log_new_name(struct btrfs_trans_handle *trans,
+ struct dentry *old_dentry, struct btrfs_inode *old_dir,
+ u64 old_dir_index, struct dentry *parent);
+
+#endif