bcachefs: Initial commit

Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write
filesystem with every feature you could possibly want.

Website: https://bcachefs.org

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 44 insertions, 0 deletions

diff --git a/fs/bcachefs/journal_io.h b/fs/bcachefs/journal_io.h
new file mode 100644
index 000000000000..35f90c96008a
--- /dev/null
+++ b/fs/bcachefs/journal_io.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_JOURNAL_IO_H
+#define _BCACHEFS_JOURNAL_IO_H
+
+/*
+ * Only used for holding the journal entries we read in btree_journal_read()
+ * during cache_registration
+ */
+struct journal_replay {
+	struct list_head	list;
+	struct bch_devs_list	devs;
+	/* must be last: */
+	struct jset		j;
+};
+
+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 (entry = (jset)->start;					\
+	     (entry = __jset_entry_type_next(jset, entry, type));	\
+	     entry = vstruct_next(entry))
+
+#define for_each_jset_key(k, _n, entry, jset)				\
+	for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)	\
+		vstruct_for_each_safe(entry, k, _n)
+
+int bch2_journal_set_seq(struct bch_fs *c, u64, u64);
+int bch2_journal_read(struct bch_fs *, struct list_head *);
+
+int bch2_journal_entry_sectors(struct journal *);
+void bch2_journal_write(struct closure *);
+
+#endif /* _BCACHEFS_JOURNAL_IO_H */