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, 55 insertions, 0 deletions

diff --git a/fs/bcachefs/dirent.h b/fs/bcachefs/dirent.h
new file mode 100644
index 000000000000..d02dc3e10d95
--- /dev/null
+++ b/fs/bcachefs/dirent.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_DIRENT_H
+#define _BCACHEFS_DIRENT_H
+
+#include "str_hash.h"
+
+extern const struct bch_hash_desc bch2_dirent_hash_desc;
+
+const char *bch2_dirent_invalid(const struct bch_fs *, struct bkey_s_c);
+void bch2_dirent_to_text(struct bch_fs *, char *, size_t, struct bkey_s_c);
+
+#define bch2_bkey_dirent_ops (struct bkey_ops) {	\
+	.key_invalid	= bch2_dirent_invalid,		\
+	.val_to_text	= bch2_dirent_to_text,		\
+}
+
+struct qstr;
+struct file;
+struct dir_context;
+struct bch_fs;
+struct bch_hash_info;
+struct bch_inode_info;
+
+unsigned bch2_dirent_name_bytes(struct bkey_s_c_dirent);
+
+int __bch2_dirent_create(struct btree_trans *, u64,
+			 const struct bch_hash_info *, u8,
+			 const struct qstr *, u64, int);
+int bch2_dirent_create(struct bch_fs *c, u64, const struct bch_hash_info *,
+		       u8, const struct qstr *, u64, u64 *, int);
+
+int __bch2_dirent_delete(struct btree_trans *, u64,
+			 const struct bch_hash_info *,
+			 const struct qstr *);
+int bch2_dirent_delete(struct bch_fs *, u64, const struct bch_hash_info *,
+		       const struct qstr *, u64 *);
+
+enum bch_rename_mode {
+	BCH_RENAME,
+	BCH_RENAME_OVERWRITE,
+	BCH_RENAME_EXCHANGE,
+};
+
+int bch2_dirent_rename(struct btree_trans *,
+		       struct bch_inode_info *, const struct qstr *,
+		       struct bch_inode_info *, const struct qstr *,
+		       enum bch_rename_mode);
+
+u64 bch2_dirent_lookup(struct bch_fs *, u64, const struct bch_hash_info *,
+		       const struct qstr *);
+
+int bch2_empty_dir(struct bch_fs *, u64);
+int bch2_readdir(struct bch_fs *, struct file *, struct dir_context *);
+
+#endif /* _BCACHEFS_DIRENT_H */