libxfs/xfs_attr_sf.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_ATTR_SF_H__
   7 #define __XFS_ATTR_SF_H__
   8
   9 /*
  10  * Attribute storage when stored inside the inode.
  11  *
  12  * Small attribute lists are packed as tightly as possible so as
  13  * to fit into the literal area of the inode.
  14  */
  15 typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t;
  16 typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t;
  17
  18 /*
  19  * We generate this then sort it, attr_list() must return things in hash-order.
  20  */
  21 typedef struct xfs_attr_sf_sort {
  22         uint8_t         entno;          /* entry number in original list */
  23         uint8_t         namelen;        /* length of name value (no null) */
  24         uint8_t         valuelen;       /* length of value */
  25         uint8_t         flags;          /* flags bits (see xfs_attr_leaf.h) */
  26         xfs_dahash_t    hash;           /* this entry's hash value */
  27         unsigned char   *name;          /* name value, pointer into buffer */
  28 } xfs_attr_sf_sort_t;
  29
  30 #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen)   /* space name/value uses */ \
  31         (((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen)))
  32 #define XFS_ATTR_SF_ENTSIZE_MAX                 /* max space for name&value */ \
  33         ((1 << (NBBY*(int)sizeof(uint8_t))) - 1)
  34 #define XFS_ATTR_SF_ENTSIZE(sfep)               /* space an entry uses */ \
  35         ((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen)
  36 #define XFS_ATTR_SF_NEXTENTRY(sfep)             /* next entry in struct */ \
  37         ((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep)))
  38 #define XFS_ATTR_SF_TOTSIZE(dp)                 /* total space in use */ \
  39         (be16_to_cpu(((xfs_attr_shortform_t *)  \
  40                 ((dp)->i_afp->if_u1.if_data))->hdr.totsize))
  41
  42 #endif  /* __XFS_ATTR_SF_H__ */