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, 63 insertions, 0 deletions

diff --git a/fs/bcachefs/super_types.h b/fs/bcachefs/super_types.h
new file mode 100644
index 000000000000..4d8265bb3154
--- /dev/null
+++ b/fs/bcachefs/super_types.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SUPER_TYPES_H
+#define _BCACHEFS_SUPER_TYPES_H
+
+struct bch_sb_handle {
+	struct bch_sb		*sb;
+	struct block_device	*bdev;
+	struct bio		*bio;
+	void			*holder;
+	unsigned		page_order;
+	fmode_t			mode;
+	unsigned		have_layout:1;
+	unsigned		have_bio:1;
+	unsigned		fs_sb:1;
+};
+
+struct bch_devs_mask {
+	unsigned long d[BITS_TO_LONGS(BCH_SB_MEMBERS_MAX)];
+};
+
+struct bch_devs_list {
+	u8			nr;
+	u8			devs[BCH_REPLICAS_MAX + 1];
+};
+
+struct bch_member_cpu {
+	u64			nbuckets;	/* device size */
+	u16			first_bucket;   /* index of first bucket used */
+	u16			bucket_size;	/* sectors */
+	u16			group;
+	u8			state;
+	u8			replacement;
+	u8			discard;
+	u8			data_allowed;
+	u8			durability;
+	u8			valid;
+};
+
+struct bch_replicas_cpu_entry {
+	u8			data_type;
+	u8			devs[BCH_SB_MEMBERS_MAX / 8];
+};
+
+struct bch_replicas_cpu {
+	struct rcu_head		rcu;
+	unsigned		nr;
+	unsigned		entry_size;
+	struct bch_replicas_cpu_entry entries[];
+};
+
+struct bch_disk_group_cpu {
+	bool				deleted;
+	u16				parent;
+	struct bch_devs_mask		devs;
+};
+
+struct bch_disk_groups_cpu {
+	struct rcu_head			rcu;
+	unsigned			nr;
+	struct bch_disk_group_cpu	entries[];
+};
+
+#endif /* _BCACHEFS_SUPER_TYPES_H */