[deliverable/linux.git] / fs / xfs / libxfs / xfs_attr_leaf.h

/*
 * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
 * Copyright (c) 2013 Red Hat, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_ATTR_LEAF_H__
#define	__XFS_ATTR_LEAF_H__

struct attrlist;
struct attrlist_cursor_kern;
struct xfs_attr_list_context;
struct xfs_da_args;
struct xfs_da_state;
struct xfs_da_state_blk;
struct xfs_inode;
struct xfs_trans;

/*
 * Used to keep a list of "remote value" extents when unlinking an inode.
 */
typedef struct xfs_attr_inactive_list {
	xfs_dablk_t	valueblk;	/* block number of value bytes */
	int		valuelen;	/* number of bytes in value */
} xfs_attr_inactive_list_t;


/*========================================================================
 * Function prototypes for the kernel.
 *========================================================================*/

/*
 * Internal routines when attribute fork size < XFS_LITINO(mp).
 */
void	xfs_attr_shortform_create(struct xfs_da_args *args);
void	xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
int	xfs_attr_shortform_lookup(struct xfs_da_args *args);
int	xfs_attr_shortform_getvalue(struct xfs_da_args *args);
int	xfs_attr_shortform_to_leaf(struct xfs_da_args *args);
int	xfs_attr_shortform_remove(struct xfs_da_args *args);
int	xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
int	xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes);
void	xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);

/*
 * Internal routines when attribute fork size == XFS_LBSIZE(mp).
 */
int	xfs_attr3_leaf_to_node(struct xfs_da_args *args);
int	xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
				   struct xfs_da_args *args, int forkoff);
int	xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
int	xfs_attr3_leaf_setflag(struct xfs_da_args *args);
int	xfs_attr3_leaf_flipflags(struct xfs_da_args *args);

/*
 * Routines used for growing the Btree.
 */
int	xfs_attr3_leaf_split(struct xfs_da_state *state,
				   struct xfs_da_state_blk *oldblk,
				   struct xfs_da_state_blk *newblk);
int	xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
					struct xfs_da_args *args);
int	xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
int	xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
				 struct xfs_da_args *args);
int	xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
				    struct xfs_da_args *args);
int	xfs_attr3_leaf_list_int(struct xfs_buf *bp,
				      struct xfs_attr_list_context *context);

/*
 * Routines used for shrinking the Btree.
 */
int	xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
void	xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
				       struct xfs_da_state_blk *drop_blk,
				       struct xfs_da_state_blk *save_blk);
/*
 * Utility routines.
 */
xfs_dahash_t	xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
int	xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
				   struct xfs_buf *leaf2_bp);
int	xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
int	xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
			xfs_dablk_t bno, xfs_daddr_t mappedbno,
			struct xfs_buf **bpp);
void	xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
				     struct xfs_attr3_icleaf_hdr *to,
				     struct xfs_attr_leafblock *from);
void	xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
				   struct xfs_attr_leafblock *to,
				   struct xfs_attr3_icleaf_hdr *from);

#endif	/* __XFS_ATTR_LEAF_H__ */
Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
	3	* Copyright (c) 2013 Red Hat, Inc.
	4	* All Rights Reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it would be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write the Free Software Foundation,
	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
	19	#ifndef __XFS_ATTR_LEAF_H__
	20	#define __XFS_ATTR_LEAF_H__
	21
	22	struct attrlist;
	23	struct attrlist_cursor_kern;
	24	struct xfs_attr_list_context;
	25	struct xfs_da_args;
	26	struct xfs_da_state;
	27	struct xfs_da_state_blk;
	28	struct xfs_inode;
	29	struct xfs_trans;
	30
	31	/*
	32	* Used to keep a list of "remote value" extents when unlinking an inode.
	33	*/
	34	typedef struct xfs_attr_inactive_list {
	35	xfs_dablk_t valueblk; /* block number of value bytes */
	36	int valuelen; /* number of bytes in value */
	37	} xfs_attr_inactive_list_t;
	38
	39
	40	/*========================================================================
	41	* Function prototypes for the kernel.
	42	========================================================================/
	43
	44	/*
	45	* Internal routines when attribute fork size < XFS_LITINO(mp).
	46	*/
	47	void xfs_attr_shortform_create(struct xfs_da_args *args);
	48	void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
	49	int xfs_attr_shortform_lookup(struct xfs_da_args *args);
	50	int xfs_attr_shortform_getvalue(struct xfs_da_args *args);
	51	int xfs_attr_shortform_to_leaf(struct xfs_da_args *args);
	52	int xfs_attr_shortform_remove(struct xfs_da_args *args);
	53	int xfs_attr_shortform_allfit(struct xfs_buf bp, struct xfs_inode dp);
	54	int xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes);
	55	void xfs_attr_fork_remove(struct xfs_inode ip, struct xfs_trans tp);
	56
	57	/*
	58	* Internal routines when attribute fork size == XFS_LBSIZE(mp).
	59	*/
	60	int xfs_attr3_leaf_to_node(struct xfs_da_args *args);
	61	int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
	62	struct xfs_da_args *args, int forkoff);
	63	int xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
	64	int xfs_attr3_leaf_setflag(struct xfs_da_args *args);
	65	int xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
	66
	67	/*
	68	* Routines used for growing the Btree.
	69	*/
	70	int xfs_attr3_leaf_split(struct xfs_da_state *state,
	71	struct xfs_da_state_blk *oldblk,
	72	struct xfs_da_state_blk *newblk);
	73	int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
	74	struct xfs_da_args *args);
	75	int xfs_attr3_leaf_getvalue(struct xfs_buf bp, struct xfs_da_args args);
	76	int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
	77	struct xfs_da_args *args);
	78	int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
	79	struct xfs_da_args *args);
	80	int xfs_attr3_leaf_list_int(struct xfs_buf *bp,
	81	struct xfs_attr_list_context *context);
	82
	83	/*
	84	* Routines used for shrinking the Btree.
	85	*/
	86	int xfs_attr3_leaf_toosmall(struct xfs_da_state state, int retval);
	87	void xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
	88	struct xfs_da_state_blk *drop_blk,
	89	struct xfs_da_state_blk *save_blk);
	90	/*
	91	* Utility routines.
	92	*/
	93	xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf bp, int count);
	94	int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
	95	struct xfs_buf *leaf2_bp);
	96	int xfs_attr_leaf_newentsize(struct xfs_da_args args, int local);
	97	int xfs_attr3_leaf_read(struct xfs_trans tp, struct xfs_inode dp,
	98	xfs_dablk_t bno, xfs_daddr_t mappedbno,
	99	struct xfs_buf **bpp);
	100	void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
	101	struct xfs_attr3_icleaf_hdr *to,
	102	struct xfs_attr_leafblock *from);
	103	void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
	104	struct xfs_attr_leafblock *to,
	105	struct xfs_attr3_icleaf_hdr *from);
	106
	107	#endif /* __XFS_ATTR_LEAF_H__ */