fs/xfs/xfs_attr_leaf.h

   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
  22 struct attrlist;
  23 struct attrlist_cursor_kern;
  24 struct xfs_attr_list_context;
  25 struct xfs_da_args;
  26 struct xfs_da_state;
  27 struct xfs_da_state_blk;
  28 struct xfs_inode;
  29 struct xfs_trans;
  30
  31 /*
  32  * Used to keep a list of "remote value" extents when unlinking an inode.
  33  */
  34 typedef 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  */
  47 void    xfs_attr_shortform_create(struct xfs_da_args *args);
  48 void    xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
  49 int     xfs_attr_shortform_lookup(struct xfs_da_args *args);
  50 int     xfs_attr_shortform_getvalue(struct xfs_da_args *args);
  51 int     xfs_attr_shortform_to_leaf(struct xfs_da_args *args);
  52 int     xfs_attr_shortform_remove(struct xfs_da_args *args);
  53 int     xfs_attr_shortform_list(struct xfs_attr_list_context *context);
  54 int     xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
  55 int     xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes);
  56
  57
  58 /*
  59  * Internal routines when attribute fork size == XFS_LBSIZE(mp).
  60  */
  61 int     xfs_attr3_leaf_to_node(struct xfs_da_args *args);
  62 int     xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
  63                                    struct xfs_da_args *args, int forkoff);
  64 int     xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
  65 int     xfs_attr3_leaf_setflag(struct xfs_da_args *args);
  66 int     xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
  67
  68 /*
  69  * Routines used for growing the Btree.
  70  */
  71 int     xfs_attr3_leaf_split(struct xfs_da_state *state,
  72                                    struct xfs_da_state_blk *oldblk,
  73                                    struct xfs_da_state_blk *newblk);
  74 int     xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
  75                                         struct xfs_da_args *args);
  76 int     xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
  77 int     xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
  78                                  struct xfs_da_args *args);
  79 int     xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
  80                                     struct xfs_da_args *args);
  81 int     xfs_attr3_leaf_list_int(struct xfs_buf *bp,
  82                                       struct xfs_attr_list_context *context);
  83
  84 /*
  85  * Routines used for shrinking the Btree.
  86  */
  87 int     xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
  88 void    xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
  89                                        struct xfs_da_state_blk *drop_blk,
  90                                        struct xfs_da_state_blk *save_blk);
  91 int     xfs_attr3_root_inactive(struct xfs_trans **trans, struct xfs_inode *dp);
  92
  93 /*
  94  * Utility routines.
  95  */
  96 xfs_dahash_t    xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
  97 int     xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
  98                                    struct xfs_buf *leaf2_bp);
  99 int     xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize,
 100                                         int *local);
 101 int     xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
 102                         xfs_dablk_t bno, xfs_daddr_t mappedbno,
 103                         struct xfs_buf **bpp);
 104 void    xfs_attr3_leaf_hdr_from_disk(struct xfs_attr3_icleaf_hdr *to,
 105                                      struct xfs_attr_leafblock *from);
 106 void    xfs_attr3_leaf_hdr_to_disk(struct xfs_attr_leafblock *to,
 107                                    struct xfs_attr3_icleaf_hdr *from);
 108
 109 #endif  /* __XFS_ATTR_LEAF_H__ */