xattr.h 1.9 KB

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  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. #ifndef __EATTR_DOT_H__
  7. #define __EATTR_DOT_H__
  8. struct gfs2_inode;
  9. struct iattr;
  10. #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
  11. #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
  12. #define GFS2_EA_SIZE(ea) \
  13. ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
  14. ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
  15. (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
  16. #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
  17. #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
  18. #define GFS2_EAREQ_SIZE_STUFFED(er) \
  19. ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
  20. #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
  21. #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
  22. #define GFS2_EA2DATAPTRS(ea) \
  23. ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
  24. #define GFS2_EA2NEXT(ea) \
  25. ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
  26. #define GFS2_EA_BH2FIRST(bh) \
  27. ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
  28. struct gfs2_ea_request {
  29. const char *er_name;
  30. char *er_data;
  31. unsigned int er_name_len;
  32. unsigned int er_data_len;
  33. unsigned int er_type; /* GFS2_EATYPE_... */
  34. };
  35. struct gfs2_ea_location {
  36. struct buffer_head *el_bh;
  37. struct gfs2_ea_header *el_ea;
  38. struct gfs2_ea_header *el_prev;
  39. };
  40. extern int __gfs2_xattr_set(struct inode *inode, const char *name,
  41. const void *value, size_t size,
  42. int flags, int type);
  43. extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
  44. extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
  45. /* Exported to acl.c */
  46. extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
  47. #endif /* __EATTR_DOT_H__ */