eattr.h 3.1 KB

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  1. /*
  2. * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
  3. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
  4. *
  5. * This copyrighted material is made available to anyone wishing to use,
  6. * modify, copy, or redistribute it subject to the terms and conditions
  7. * of the GNU General Public License v.2.
  8. */
  9. #ifndef __EATTR_DOT_H__
  10. #define __EATTR_DOT_H__
  11. #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
  12. #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
  13. #define GFS2_EA_SIZE(ea) \
  14. ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
  15. ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
  16. (sizeof(uint64_t) * (ea)->ea_num_ptrs)), 8)
  17. #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
  18. #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
  19. #define GFS2_EAREQ_SIZE_STUFFED(er) \
  20. ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
  21. #define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
  22. ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
  23. sizeof(uint64_t) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
  24. #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
  25. #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
  26. #define GFS2_EA2DATAPTRS(ea) \
  27. ((uint64_t *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
  28. #define GFS2_EA2NEXT(ea) \
  29. ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
  30. #define GFS2_EA_BH2FIRST(bh) \
  31. ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
  32. #define GFS2_ERF_MODE 0x80000000
  33. struct gfs2_ea_request {
  34. char *er_name;
  35. char *er_data;
  36. unsigned int er_name_len;
  37. unsigned int er_data_len;
  38. unsigned int er_type; /* GFS2_EATYPE_... */
  39. int er_flags;
  40. mode_t er_mode;
  41. };
  42. struct gfs2_ea_location {
  43. struct buffer_head *el_bh;
  44. struct gfs2_ea_header *el_ea;
  45. struct gfs2_ea_header *el_prev;
  46. };
  47. int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  48. int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  49. int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  50. int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  51. int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  52. int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  53. int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  54. int gfs2_ea_dealloc(struct gfs2_inode *ip);
  55. /* Exported to acl.c */
  56. int gfs2_ea_find(struct gfs2_inode *ip,
  57. struct gfs2_ea_request *er,
  58. struct gfs2_ea_location *el);
  59. int gfs2_ea_get_copy(struct gfs2_inode *ip,
  60. struct gfs2_ea_location *el,
  61. char *data);
  62. int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
  63. struct iattr *attr, char *data);
  64. static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
  65. {
  66. switch (ea->ea_type) {
  67. case GFS2_EATYPE_USR:
  68. return (5 + (ea->ea_name_len + 1));
  69. case GFS2_EATYPE_SYS:
  70. return (7 + (ea->ea_name_len + 1));
  71. case GFS2_EATYPE_SECURITY:
  72. return (9 + (ea->ea_name_len + 1));
  73. default:
  74. return (0);
  75. }
  76. }
  77. #endif /* __EATTR_DOT_H__ */