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);
56void	xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);
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(struct xfs_da_args *args, int *local);
100int	xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
101			xfs_dablk_t bno, xfs_daddr_t mappedbno,
102			struct xfs_buf **bpp);
103void	xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
104				     struct xfs_attr3_icleaf_hdr *to,
105				     struct xfs_attr_leafblock *from);
106void	xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
107				   struct xfs_attr_leafblock *to,
108				   struct xfs_attr3_icleaf_hdr *from);
109
110#endif	/* __XFS_ATTR_LEAF_H__ */
111