[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 inode we're operating on, this can be NULL if
	 * ->clear_extent_range is false.
	 */
	struct btrfs_inode *inode;

	/* 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: the ino we are truncating. */
	u64 ino;

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

	/*
	 * IN: true if we don't want to do extent reference updates for any file
	 * extents we drop.
	 */
	bool skip_ref_updates;

	/*
	 * IN: true if we need to clear the file extent range for the inode as
	 * we drop the file extent items.
	 */
	bool clear_extent_range;
};

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 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	22	struct btrfs_truncate_control {
71d18b53 JB	23	/*
	24	* IN: the inode we're operating on, this can be NULL if
	25	* ->clear_extent_range is false.
	26	*/
	27	struct btrfs_inode *inode;
	28
d9ac19c3 JB	29	/* IN: the size we're truncating to. */
	30	u64 new_size;
	31
	32	/* OUT: the number of extents truncated. */
	33	u64 extents_found;
	34
c2ddb612 JB	35	/* OUT: the last size we truncated this inode to. */
	36	u64 last_size;
	37
462b728e JB	38	/* OUT: the number of bytes to sub from this inode. */
	39	u64 sub_bytes;
	40
487e81d2 JB	41	/* IN: the ino we are truncating. */
	42	u64 ino;
	43
d9ac19c3 JB	44	/*
	45	* IN: minimum key type to remove. All key types with this type are
	46	* removed only if their offset >= new_size.
	47	*/
	48	u32 min_type;
5caa490e JB	49
	50	/*
	51	* IN: true if we don't want to do extent reference updates for any file
	52	* extents we drop.
	53	*/
	54	bool skip_ref_updates;
655807b8 JB	55
	56	/*
	57	* IN: true if we need to clear the file extent range for the inode as
	58	* we drop the file extent items.
	59	*/
	60	bool clear_extent_range;
d9ac19c3 JB	61	};
d9ac19c3 JB	62
54f03ab1 JB	63	int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
54f03ab1 JB	64	struct btrfs_root *root,
d9ac19c3	65	struct btrfs_truncate_control *control);
26c2c454 JB	66	int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
	67	struct btrfs_root *root,
	68	const char *name, int name_len,
	69	u64 inode_objectid, u64 ref_objectid, u64 index);
	70	int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
	71	struct btrfs_root *root,
	72	const char *name, int name_len,
	73	u64 inode_objectid, u64 ref_objectid, u64 *index);
	74	int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
	75	struct btrfs_root *root,
	76	struct btrfs_path *path, u64 objectid);
	77	int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
	78	root, struct btrfs_path path,
	79	struct btrfs_key *location, int mod);
	80
	81	struct btrfs_inode_extref *btrfs_lookup_inode_extref(
	82	struct btrfs_trans_handle *trans,
	83	struct btrfs_root *root,
	84	struct btrfs_path *path,
	85	const char *name, int name_len,
	86	u64 inode_objectid, u64 ref_objectid, int ins_len,
	87	int cow);
	88
	89	struct btrfs_inode_ref btrfs_find_name_in_backref(struct extent_buffer leaf,
	90	int slot, const char *name,
	91	int name_len);
	92	struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
	93	struct extent_buffer *leaf, int slot, u64 ref_objectid,
	94	const char *name, int name_len);
	95
	96	#endif