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xfs: embedded the attrlist cursor into struct xfs_attr_list_context
[mirror_ubuntu-hirsute-kernel.git] / fs / xfs / libxfs / xfs_attr_leaf.h
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0b61f8a4 1// SPDX-License-Identifier: GPL-2.0
1da177e4 2/*
7b718769 3 * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
517c2220 4 * Copyright (c) 2013 Red Hat, Inc.
aa82daa0 5 * All Rights Reserved.
1da177e4
LT
6 */
7#ifndef __XFS_ATTR_LEAF_H__
8#define __XFS_ATTR_LEAF_H__
9
1da177e4 10struct attrlist;
ad9b463a 11struct xfs_attr_list_context;
1da177e4
LT
12struct xfs_da_args;
13struct xfs_da_state;
14struct xfs_da_state_blk;
15struct xfs_inode;
16struct xfs_trans;
17
a39f089a
CH
18/*
19 * Incore version of the attribute leaf header.
20 */
21struct xfs_attr3_icleaf_hdr {
22 uint32_t forw;
23 uint32_t back;
24 uint16_t magic;
25 uint16_t count;
26 uint16_t usedbytes;
27 /*
28 * Firstused is 32-bit here instead of 16-bit like the on-disk variant
29 * to support maximum fsb size of 64k without overflow issues throughout
30 * the attr code. Instead, the overflow condition is handled on
31 * conversion to/from disk.
32 */
33 uint32_t firstused;
34 __u8 holes;
35 struct {
36 uint16_t base;
37 uint16_t size;
38 } freemap[XFS_ATTR_LEAF_MAPSIZE];
39};
40
1da177e4
LT
41/*========================================================================
42 * Function prototypes for the kernel.
43 *========================================================================*/
44
45/*
d8cc890d 46 * Internal routines when attribute fork size < XFS_LITINO(mp).
1da177e4 47 */
d8cc890d
NS
48void xfs_attr_shortform_create(struct xfs_da_args *args);
49void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
1da177e4
LT
50int xfs_attr_shortform_lookup(struct xfs_da_args *args);
51int xfs_attr_shortform_getvalue(struct xfs_da_args *args);
6e643cd0
DW
52int xfs_attr_shortform_to_leaf(struct xfs_da_args *args,
53 struct xfs_buf **leaf_bp);
d8cc890d 54int xfs_attr_shortform_remove(struct xfs_da_args *args);
1d9025e5 55int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
ae90b994 56int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes);
1e1bbd8e 57xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip);
6dfe5a04 58void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);
1da177e4
LT
59
60/*
d8cc890d 61 * Internal routines when attribute fork size == XFS_LBSIZE(mp).
1da177e4 62 */
517c2220
DC
63int xfs_attr3_leaf_to_node(struct xfs_da_args *args);
64int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
d8cc890d 65 struct xfs_da_args *args, int forkoff);
517c2220
DC
66int xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
67int xfs_attr3_leaf_setflag(struct xfs_da_args *args);
68int xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
1da177e4
LT
69
70/*
71 * Routines used for growing the Btree.
72 */
517c2220 73int xfs_attr3_leaf_split(struct xfs_da_state *state,
1da177e4
LT
74 struct xfs_da_state_blk *oldblk,
75 struct xfs_da_state_blk *newblk);
517c2220 76int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
1da177e4 77 struct xfs_da_args *args);
517c2220
DC
78int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
79int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
1da177e4 80 struct xfs_da_args *args);
517c2220 81int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
1da177e4 82 struct xfs_da_args *args);
16c6e92c
DW
83int xfs_attr3_leaf_list_int(struct xfs_buf *bp,
84 struct xfs_attr_list_context *context);
1da177e4
LT
85
86/*
87 * Routines used for shrinking the Btree.
88 */
517c2220
DC
89int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
90void xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
1da177e4
LT
91 struct xfs_da_state_blk *drop_blk,
92 struct xfs_da_state_blk *save_blk);
1da177e4
LT
93/*
94 * Utility routines.
95 */
1d9025e5
DC
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);
c59f0ad2 99int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
517c2220 100int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
dfb87594 101 xfs_dablk_t bno, struct xfs_buf **bpp);
2f661241
BF
102void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
103 struct xfs_attr3_icleaf_hdr *to,
517c2220 104 struct xfs_attr_leafblock *from);
2f661241
BF
105void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
106 struct xfs_attr_leafblock *to,
d386b32b 107 struct xfs_attr3_icleaf_hdr *from);
1813dd64 108
1da177e4 109#endif /* __XFS_ATTR_LEAF_H__ */