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
 22struct attrlist;
 23struct attrlist_cursor_kern;
 24struct xfs_attr_list_context;
 25struct xfs_da_args;
 26struct xfs_da_state;
 27struct xfs_da_state_blk;
 28struct xfs_inode;
 29struct xfs_trans;
 30
 31/*
 32 * Used to keep a list of "remote value" extents when unlinking an inode.
 33 */
 34typedef 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 */
 47void	xfs_attr_shortform_create(struct xfs_da_args *args);
 48void	xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
 49int	xfs_attr_shortform_lookup(struct xfs_da_args *args);
 50int	xfs_attr_shortform_getvalue(struct xfs_da_args *args);
 51int	xfs_attr_shortform_to_leaf(struct xfs_da_args *args);
 52int	xfs_attr_shortform_remove(struct xfs_da_args *args);
 53int	xfs_attr_shortform_list(struct xfs_attr_list_context *context);
 54int	xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
 55int	xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes);
 56
 57
 58/*
 59 * Internal routines when attribute fork size == XFS_LBSIZE(mp).
 60 */
 61int	xfs_attr3_leaf_to_node(struct xfs_da_args *args);
 62int	xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
 63				   struct xfs_da_args *args, int forkoff);
 64int	xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
 65int	xfs_attr3_leaf_setflag(struct xfs_da_args *args);
 66int	xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
 67
 68/*
 69 * Routines used for growing the Btree.
 70 */
 71int	xfs_attr3_leaf_split(struct xfs_da_state *state,
 72				   struct xfs_da_state_blk *oldblk,
 73				   struct xfs_da_state_blk *newblk);
 74int	xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
 75					struct xfs_da_args *args);
 76int	xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
 77int	xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
 78				 struct xfs_da_args *args);
 79int	xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
 80				    struct xfs_da_args *args);
 81int	xfs_attr3_leaf_list_int(struct xfs_buf *bp,
 82				      struct xfs_attr_list_context *context);
 83
 84/*
 85 * Routines used for shrinking the Btree.
 86 */
 87int	xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
 88void	xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
 89				       struct xfs_da_state_blk *drop_blk,
 90				       struct xfs_da_state_blk *save_blk);
 91int	xfs_attr3_root_inactive(struct xfs_trans **trans, struct xfs_inode *dp);
 92
 93/*
 94 * Utility routines.
 95 */
 96xfs_dahash_t	xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
 97int	xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
 98				   struct xfs_buf *leaf2_bp);
 99int	xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize,
100					int *local);
101int	xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
102			xfs_dablk_t bno, xfs_daddr_t mappedbno,
103			struct xfs_buf **bpp);
104void	xfs_attr3_leaf_hdr_from_disk(struct xfs_attr3_icleaf_hdr *to,
105				     struct xfs_attr_leafblock *from);
106void	xfs_attr3_leaf_hdr_to_disk(struct xfs_attr_leafblock *to,
107				   struct xfs_attr3_icleaf_hdr *from);
108
109#endif	/* __XFS_ATTR_LEAF_H__ */