LXR linux/fs/xfs/libxfs/xfs_attr

   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,
  52                        struct xfs_buf **leaf_bp);
  53int     xfs_attr_shortform_remove(struct xfs_da_args *args);
  54int     xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
  55int     xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes);
  56xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip);
  57void    xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);
  58
  59/*
  60 * Internal routines when attribute fork size == XFS_LBSIZE(mp).
  61 */
  62int     xfs_attr3_leaf_to_node(struct xfs_da_args *args);
  63int     xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
  64                                   struct xfs_da_args *args, int forkoff);
  65int     xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
  66int     xfs_attr3_leaf_setflag(struct xfs_da_args *args);
  67int     xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
  68
  69/*
  70 * Routines used for growing the Btree.
  71 */
  72int     xfs_attr3_leaf_split(struct xfs_da_state *state,
  73                                   struct xfs_da_state_blk *oldblk,
  74                                   struct xfs_da_state_blk *newblk);
  75int     xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
  76                                        struct xfs_da_args *args);
  77int     xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
  78int     xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
  79                                 struct xfs_da_args *args);
  80int     xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
  81                                    struct xfs_da_args *args);
  82void    xfs_attr3_leaf_list_int(struct xfs_buf *bp,
  83                                      struct xfs_attr_list_context *context);
  84
  85/*
  86 * Routines used for shrinking the Btree.
  87 */
  88int     xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
  89void    xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
  90                                       struct xfs_da_state_blk *drop_blk,
  91                                       struct xfs_da_state_blk *save_blk);
  92/*
  93 * Utility routines.
  94 */
  95xfs_dahash_t    xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
  96int     xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
  97                                   struct xfs_buf *leaf2_bp);
  98int     xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
  99int     xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
 100                        xfs_dablk_t bno, xfs_daddr_t mappedbno,
 101                        struct xfs_buf **bpp);
 102void    xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
 103                                     struct xfs_attr3_icleaf_hdr *to,
 104                                     struct xfs_attr_leafblock *from);
 105void    xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
 106                                   struct xfs_attr_leafblock *to,
 107                                   struct xfs_attr3_icleaf_hdr *from);
 108
 109#endif  /* __XFS_ATTR_LEAF_H__ */
 110