fs/gfs2/xattr.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #ifndef __EATTR_DOT_H__
   8 #define __EATTR_DOT_H__
   9
  10 struct gfs2_inode;
  11 struct iattr;
  12
  13 #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
  14 #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
  15
  16 #define GFS2_EA_SIZE(ea) \
  17 ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
  18       ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
  19                                   (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
  20
  21 #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
  22 #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
  23
  24 #define GFS2_EAREQ_SIZE_STUFFED(er) \
  25 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
  26
  27 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
  28 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
  29
  30 #define GFS2_EA2DATAPTRS(ea) \
  31 ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
  32
  33 #define GFS2_EA2NEXT(ea) \
  34 ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
  35
  36 #define GFS2_EA_BH2FIRST(bh) \
  37 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
  38
  39 struct gfs2_ea_request {
  40         const char *er_name;
  41         char *er_data;
  42         unsigned int er_name_len;
  43         unsigned int er_data_len;
  44         unsigned int er_type; /* GFS2_EATYPE_... */
  45 };
  46
  47 struct gfs2_ea_location {
  48         struct buffer_head *el_bh;
  49         struct gfs2_ea_header *el_ea;
  50         struct gfs2_ea_header *el_prev;
  51 };
  52
  53 extern int __gfs2_xattr_set(struct inode *inode, const char *name,
  54                             const void *value, size_t size,
  55                             int flags, int type);
  56 extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
  57 extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
  58
  59 /* Exported to acl.c */
  60
  61 extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
  62
  63 #endif /* __EATTR_DOT_H__ */