linux/fs/xfs/libxfs/xfs_attr_leaf.h
Christoph Hellwig e3a19cdea8 xfs: embedded the attrlist cursor into struct xfs_attr_list_context
The attrlist cursor only exists as part of an attr list context, so
embedd the structure instead of pointing to it.  Also give it a proper
xfs_ prefix and remove the obsolete typedef.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-03-02 20:55:55 -08:00

110 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
* Copyright (c) 2013 Red Hat, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_ATTR_LEAF_H__
#define __XFS_ATTR_LEAF_H__
struct attrlist;
struct xfs_attr_list_context;
struct xfs_da_args;
struct xfs_da_state;
struct xfs_da_state_blk;
struct xfs_inode;
struct xfs_trans;
/*
* Incore version of the attribute leaf header.
*/
struct xfs_attr3_icleaf_hdr {
uint32_t forw;
uint32_t back;
uint16_t magic;
uint16_t count;
uint16_t usedbytes;
/*
* Firstused is 32-bit here instead of 16-bit like the on-disk variant
* to support maximum fsb size of 64k without overflow issues throughout
* the attr code. Instead, the overflow condition is handled on
* conversion to/from disk.
*/
uint32_t firstused;
__u8 holes;
struct {
uint16_t base;
uint16_t size;
} freemap[XFS_ATTR_LEAF_MAPSIZE];
};
/*========================================================================
* 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,
struct xfs_buf **leaf_bp);
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(struct xfs_inode *dp, int bytes);
xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip);
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, 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__ */