1 files changed, 93 insertions, 0 deletions
diff --git a/fs/bcachefs/journal_io.h b/fs/bcachefs/journal_io.h
new file mode 100644
index 000000000000..2ca9cde30ea8
--- /dev/null
+++ b/fs/bcachefs/journal_io.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_JOURNAL_IO_H
+#define _BCACHEFS_JOURNAL_IO_H
+
+#include "darray.h"
+
+void bch2_journal_pos_from_member_info_set(struct bch_fs *);
+void bch2_journal_pos_from_member_info_resume(struct bch_fs *);
+
+struct journal_ptr {
+	bool		csum_good;
+	u8		dev;
+	u32		bucket;
+	u32		bucket_offset;
+	u64		sector;
+};
+
+/*
+ * Only used for holding the journal entries we read in btree_journal_read()
+ * during cache_registration
+ */
+struct journal_replay {
+	DARRAY_PREALLOCATED(struct journal_ptr, 8) ptrs;
+
+	bool			csum_good;
+	bool			ignore_blacklisted;
+	bool			ignore_not_dirty;
+	/* must be last: */
+	struct jset		j;
+};
+
+static inline bool journal_replay_ignore(struct journal_replay *i)
+{
+	return !i || i->ignore_blacklisted || i->ignore_not_dirty;
+}
+
+static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
+					struct jset_entry *entry, unsigned type)
+{
+	while (entry < vstruct_last(jset)) {
+		if (entry->type == type)
+			return entry;
+
+		entry = vstruct_next(entry);
+	}
+
+	return NULL;
+}
+
+#define for_each_jset_entry_type(entry, jset, type)			\
+	for (struct jset_entry *entry = (jset)->start;			\
+	     (entry = __jset_entry_type_next(jset, entry, type));	\
+	     entry = vstruct_next(entry))
+
+#define jset_entry_for_each_key(_e, _k)					\
+	for (struct bkey_i *_k = (_e)->start;				\
+	     _k < vstruct_last(_e);					\
+	     _k = bkey_next(_k))
+
+#define for_each_jset_key(k, entry, jset)				\
+	for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)\
+		jset_entry_for_each_key(entry, k)
+
+int bch2_journal_entry_validate(struct bch_fs *, struct jset *,
+				struct jset_entry *, unsigned, int,
+				enum bch_validate_flags);
+void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
+				struct jset_entry *);
+
+void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
+			       struct journal_replay *);
+
+int bch2_journal_read(struct bch_fs *, u64 *, u64 *, u64 *);
+
+CLOSURE_CALLBACK(bch2_journal_write);
+
+static inline struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
+{
+	struct jset_entry *entry = *end;
+	unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
+
+	memset(entry, 0, u64s * sizeof(u64));
+	/*
+	 * The u64s field counts from the start of data, ignoring the shared
+	 * fields.
+	 */
+	entry->u64s = cpu_to_le16(u64s - 1);
+
+	*end = vstruct_next(*end);
+	return entry;
+}
+
+#endif /* _BCACHEFS_JOURNAL_IO_H */