LXR linux/fs/xfs/libxfs/xfs_attr

   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 attrlist_cursor_kern;
  12struct xfs_attr_list_context;
  13struct xfs_da_args;
  14struct xfs_da_state;
  15struct xfs_da_state_blk;
  16struct xfs_inode;
  17struct xfs_trans;
  18
  19/*
  20 * Used to keep a list of "remote value" extents when unlinking an inode.
  21 */
  22typedef struct xfs_attr_inactive_list {
  23        xfs_dablk_t     valueblk;       /* block number of value bytes */
  24        int             valuelen;       /* number of bytes in value */
  25} xfs_attr_inactive_list_t;
  26
  27
  28/*========================================================================
  29 * Function prototypes for the kernel.
  30 *========================================================================*/
  31
  32/*
  33 * Internal routines when attribute fork size < XFS_LITINO(mp).
  34 */
  35void    xfs_attr_shortform_create(struct xfs_da_args *args);
  36void    xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
  37int     xfs_attr_shortform_lookup(struct xfs_da_args *args);
  38int     xfs_attr_shortform_getvalue(struct xfs_da_args *args);
  39int     xfs_attr_shortform_to_leaf(struct xfs_da_args *args,
  40                        struct xfs_buf **leaf_bp);
  41int     xfs_attr_shortform_remove(struct xfs_da_args *args);
  42int     xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
  43int     xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes);
  44xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip);
  45void    xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);
  46
  47/*
  48 * Internal routines when attribute fork size == XFS_LBSIZE(mp).
  49 */
  50int     xfs_attr3_leaf_to_node(struct xfs_da_args *args);
  51int     xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
  52                                   struct xfs_da_args *args, int forkoff);
  53int     xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
  54int     xfs_attr3_leaf_setflag(struct xfs_da_args *args);
  55int     xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
  56
  57/*
  58 * Routines used for growing the Btree.
  59 */
  60int     xfs_attr3_leaf_split(struct xfs_da_state *state,
  61                                   struct xfs_da_state_blk *oldblk,
  62                                   struct xfs_da_state_blk *newblk);
  63int     xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
  64                                        struct xfs_da_args *args);
  65int     xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
  66int     xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
  67                                 struct xfs_da_args *args);
  68int     xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
  69                                    struct xfs_da_args *args);
  70void    xfs_attr3_leaf_list_int(struct xfs_buf *bp,
  71                                      struct xfs_attr_list_context *context);
  72
  73/*
  74 * Routines used for shrinking the Btree.
  75 */
  76int     xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
  77void    xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
  78                                       struct xfs_da_state_blk *drop_blk,
  79                                       struct xfs_da_state_blk *save_blk);
  80/*
  81 * Utility routines.
  82 */
  83xfs_dahash_t    xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
  84int     xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
  85                                   struct xfs_buf *leaf2_bp);
  86int     xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
  87int     xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
  88                        xfs_dablk_t bno, xfs_daddr_t mappedbno,
  89                        struct xfs_buf **bpp);
  90void    xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
  91                                     struct xfs_attr3_icleaf_hdr *to,
  92                                     struct xfs_attr_leafblock *from);
  93void    xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
  94                                   struct xfs_attr_leafblock *to,
  95                                   struct xfs_attr3_icleaf_hdr *from);
  96
  97#endif  /* __XFS_ATTR_LEAF_H__ */
  98