xfs_attr_leaf.h (3879B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. 4 * Copyright (c) 2013 Red Hat, Inc. 5 * All Rights Reserved. 6 */ 7#ifndef __XFS_ATTR_LEAF_H__ 8#define __XFS_ATTR_LEAF_H__ 9 10struct attrlist; 11struct xfs_attr_list_context; 12struct xfs_da_args; 13struct xfs_da_state; 14struct xfs_da_state_blk; 15struct xfs_inode; 16struct xfs_trans; 17 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 41/*======================================================================== 42 * Function prototypes for the kernel. 43 *========================================================================*/ 44 45/* 46 * Internal routines when attribute fork size < XFS_LITINO(mp). 47 */ 48void xfs_attr_shortform_create(struct xfs_da_args *args); 49void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff); 50int xfs_attr_shortform_lookup(struct xfs_da_args *args); 51int xfs_attr_shortform_getvalue(struct xfs_da_args *args); 52int xfs_attr_shortform_to_leaf(struct xfs_da_args *args); 53int xfs_attr_sf_removename(struct xfs_da_args *args); 54int xfs_attr_sf_findname(struct xfs_da_args *args, 55 struct xfs_attr_sf_entry **sfep, 56 unsigned int *basep); 57int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp); 58int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes); 59xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip); 60void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp); 61 62/* 63 * Internal routines when attribute fork size == XFS_LBSIZE(mp). 64 */ 65int xfs_attr3_leaf_to_node(struct xfs_da_args *args); 66int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp, 67 struct xfs_da_args *args, int forkoff); 68int xfs_attr3_leaf_clearflag(struct xfs_da_args *args); 69int xfs_attr3_leaf_setflag(struct xfs_da_args *args); 70int xfs_attr3_leaf_flipflags(struct xfs_da_args *args); 71 72/* 73 * Routines used for growing the Btree. 74 */ 75int xfs_attr3_leaf_split(struct xfs_da_state *state, 76 struct xfs_da_state_blk *oldblk, 77 struct xfs_da_state_blk *newblk); 78int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf, 79 struct xfs_da_args *args); 80int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args); 81int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer, 82 struct xfs_da_args *args); 83int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer, 84 struct xfs_da_args *args); 85int xfs_attr3_leaf_list_int(struct xfs_buf *bp, 86 struct xfs_attr_list_context *context); 87 88/* 89 * Routines used for shrinking the Btree. 90 */ 91int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval); 92void xfs_attr3_leaf_unbalance(struct xfs_da_state *state, 93 struct xfs_da_state_blk *drop_blk, 94 struct xfs_da_state_blk *save_blk); 95/* 96 * Utility routines. 97 */ 98xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count); 99int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, 100 struct xfs_buf *leaf2_bp); 101int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local); 102int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, 103 xfs_dablk_t bno, struct xfs_buf **bpp); 104void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo, 105 struct xfs_attr3_icleaf_hdr *to, 106 struct xfs_attr_leafblock *from); 107void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo, 108 struct xfs_attr_leafblock *to, 109 struct xfs_attr3_icleaf_hdr *from); 110 111#endif /* __XFS_ATTR_LEAF_H__ */