linux/fs/btrfs/inode-item.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef BTRFS_INODE_ITEM_H
#define BTRFS_INODE_ITEM_H

#include <linux/types.h>
#include <linux/crc32c.h>

struct fscrypt_str;
struct extent_buffer;
struct btrfs_trans_handle;
struct btrfs_root;
struct btrfs_path;
struct btrfs_key;
struct btrfs_inode_extref;
struct btrfs_inode;
struct btrfs_truncate_control;

/*
 * Return this if we need to call truncate_block for the last bit of the
 * truncate.
 */
#define BTRFS_NEED_TRUNCATE_BLOCK …

struct btrfs_truncate_control { … };

/*
 * btrfs_inode_item stores flags in a u64, btrfs_inode stores them in two
 * separate u32s. These two functions convert between the two representations.
 */
static inline u64 btrfs_inode_combine_flags(u32 flags, u32 ro_flags)
{ … }

static inline void btrfs_inode_split_flags(u64 inode_item_flags,
					   u32 *flags, u32 *ro_flags)
{ … }

/* Figure the key offset of an extended inode ref. */
static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, int len)
{ … }

int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct btrfs_truncate_control *control);
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, const struct fscrypt_str *name,
			   u64 inode_objectid, u64 ref_objectid, u64 index);
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, const struct fscrypt_str *name,
			u64 inode_objectid, u64 ref_objectid, u64 *index);
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
int btrfs_lookup_inode(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);

struct btrfs_inode_extref *btrfs_lookup_inode_extref(
			  struct btrfs_trans_handle *trans,
			  struct btrfs_root *root,
			  struct btrfs_path *path,
			  const struct fscrypt_str *name,
			  u64 inode_objectid, u64 ref_objectid, int ins_len,
			  int cow);

struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
						   int slot,
						   const struct fscrypt_str *name);
struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
		struct extent_buffer *leaf, int slot, u64 ref_objectid,
		const struct fscrypt_str *name);

#endif