[linux-2.6-block.git] / 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>

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

/*
 * Return this if we need to call truncate_block for the last bit of the
 * truncate.
 */
#define BTRFS_NEED_TRUNCATE_BLOCK		1

struct btrfs_truncate_control {
	/* IN: the size we're truncating to. */
	u64 new_size;

	/* OUT: the number of extents truncated. */
	u64 extents_found;

	/* OUT: the last size we truncated this inode to. */
	u64 last_size;

	/* OUT: the number of bytes to sub from this inode. */
	u64 sub_bytes;

	/*
	 * IN: minimum key type to remove.  All key types with this type are
	 * removed only if their offset >= new_size.
	 */
	u32 min_type;
};

int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct btrfs_inode *inode,
			       struct btrfs_truncate_control *control);
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   u64 inode_objectid, u64 ref_objectid, u64 index);
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   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 char *name, int name_len,
			  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 char *name,
						   int name_len);
struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
		struct extent_buffer *leaf, int slot, u64 ref_objectid,
		const char *name, int name_len);

#endif
Commit	Line	Data
26c2c454 JB	1	/* SPDX-License-Identifier: GPL-2.0 */
	2
	3	#ifndef BTRFS_INODE_ITEM_H
	4	#define BTRFS_INODE_ITEM_H
	5
	6	#include <linux/types.h>
	7
	8	struct btrfs_trans_handle;
	9	struct btrfs_root;
	10	struct btrfs_path;
	11	struct btrfs_key;
	12	struct btrfs_inode_extref;
54f03ab1	13	struct btrfs_inode;
26c2c454 JB	14	struct extent_buffer;
26c2c454 JB	15
54f03ab1 JB	16	/*
	17	* Return this if we need to call truncate_block for the last bit of the
	18	* truncate.
	19	*/
	20	#define BTRFS_NEED_TRUNCATE_BLOCK 1
	21
d9ac19c3 JB	22	struct btrfs_truncate_control {
	23	/* IN: the size we're truncating to. */
	24	u64 new_size;
	25
	26	/* OUT: the number of extents truncated. */
	27	u64 extents_found;
	28
c2ddb612 JB	29	/* OUT: the last size we truncated this inode to. */
	30	u64 last_size;
	31
462b728e JB	32	/* OUT: the number of bytes to sub from this inode. */
	33	u64 sub_bytes;
	34
d9ac19c3 JB	35	/*
	36	* IN: minimum key type to remove. All key types with this type are
	37	* removed only if their offset >= new_size.
	38	*/
	39	u32 min_type;
	40	};
	41
54f03ab1 JB	42	int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
54f03ab1 JB	43	struct btrfs_root *root,
d9ac19c3 JB	44	struct btrfs_inode *inode,
d9ac19c3 JB	45	struct btrfs_truncate_control *control);
26c2c454 JB	46	int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
	47	struct btrfs_root *root,
	48	const char *name, int name_len,
	49	u64 inode_objectid, u64 ref_objectid, u64 index);
	50	int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
	51	struct btrfs_root *root,
	52	const char *name, int name_len,
	53	u64 inode_objectid, u64 ref_objectid, u64 *index);
	54	int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
	55	struct btrfs_root *root,
	56	struct btrfs_path *path, u64 objectid);
	57	int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
	58	root, struct btrfs_path path,
	59	struct btrfs_key *location, int mod);
	60
	61	struct btrfs_inode_extref *btrfs_lookup_inode_extref(
	62	struct btrfs_trans_handle *trans,
	63	struct btrfs_root *root,
	64	struct btrfs_path *path,
	65	const char *name, int name_len,
	66	u64 inode_objectid, u64 ref_objectid, int ins_len,
	67	int cow);
	68
	69	struct btrfs_inode_ref btrfs_find_name_in_backref(struct extent_buffer leaf,
	70	int slot, const char *name,
	71	int name_len);
	72	struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
	73	struct extent_buffer *leaf, int slot, u64 ref_objectid,
	74	const char *name, int name_len);
	75
	76	#endif