libxfs/xfs_attr_leaf.h

   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
  10 struct attrlist;
  11 struct attrlist_cursor_kern;
  12 struct xfs_attr_list_context;
  13 struct xfs_da_args;
  14 struct xfs_da_state;
  15 struct xfs_da_state_blk;
  16 struct xfs_inode;
  17 struct xfs_trans;
  18
  19 /*
  20  * Used to keep a list of "remote value" extents when unlinking an inode.
  21  */
  22 typedef 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  */
  35 void    xfs_attr_shortform_create(struct xfs_da_args *args);
  36 void    xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
  37 int     xfs_attr_shortform_lookup(struct xfs_da_args *args);
  38 int     xfs_attr_shortform_getvalue(struct xfs_da_args *args);
  39 int     xfs_attr_shortform_to_leaf(struct xfs_da_args *args,
  40                         struct xfs_buf **leaf_bp);
  41 int     xfs_attr_shortform_remove(struct xfs_da_args *args);
  42 int     xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
  43 int     xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes);
  44 xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_inode *ip);
  45 void    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  */
  50 int     xfs_attr3_leaf_to_node(struct xfs_da_args *args);
  51 int     xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
  52                                    struct xfs_da_args *args, int forkoff);
  53 int     xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
  54 int     xfs_attr3_leaf_setflag(struct xfs_da_args *args);
  55 int     xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
  56
  57 /*
  58  * Routines used for growing the Btree.
  59  */
  60 int     xfs_attr3_leaf_split(struct xfs_da_state *state,
  61                                    struct xfs_da_state_blk *oldblk,
  62                                    struct xfs_da_state_blk *newblk);
  63 int     xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
  64                                         struct xfs_da_args *args);
  65 int     xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
  66 int     xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
  67                                  struct xfs_da_args *args);
  68 int     xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
  69                                     struct xfs_da_args *args);
  70 void    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  */
  76 int     xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
  77 void    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  */
  83 xfs_dahash_t    xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
  84 int     xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
  85                                    struct xfs_buf *leaf2_bp);
  86 int     xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
  87 int     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);
  90 void    xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
  91                                      struct xfs_attr3_icleaf_hdr *to,
  92                                      struct xfs_attr_leafblock *from);
  93 void    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__ */