LXR linux/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
  10struct gfs2_inode;
  11struct 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) \
  17ALIGN(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) \
  25ALIGN(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
  39struct 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
  47struct 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
  53extern int __gfs2_xattr_set(struct inode *inode, const char *name,
  54                            const void *value, size_t size,
  55                            int flags, int type);
  56extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
  57extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
  58
  59/* Exported to acl.c */
  60
  61extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
  62
  63#endif /* __EATTR_DOT_H__ */
  64