2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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.
10 #ifndef __EATTR_DOT_H__
11 #define __EATTR_DOT_H__
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)
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(uint64_t) * (ea)->ea_num_ptrs)), 8)
21 #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
22 #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
24 #define GFS2_EAREQ_SIZE_STUFFED(er) \
25 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
27 #define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
28 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
29 sizeof(uint64_t) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
31 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
32 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
34 #define GFS2_EA2DATAPTRS(ea) \
35 ((uint64_t *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
37 #define GFS2_EA2NEXT(ea) \
38 ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
40 #define GFS2_EA_BH2FIRST(bh) \
41 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
43 #define GFS2_ERF_MODE 0x80000000
45 struct gfs2_ea_request {
48 unsigned int er_name_len;
49 unsigned int er_data_len;
50 unsigned int er_type; /* GFS2_EATYPE_... */
55 struct gfs2_ea_location {
56 struct buffer_head *el_bh;
57 struct gfs2_ea_header *el_ea;
58 struct gfs2_ea_header *el_prev;
61 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
62 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
63 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
65 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
66 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
67 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
68 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
70 int gfs2_ea_dealloc(struct gfs2_inode *ip);
72 /* Exported to acl.c */
74 int gfs2_ea_find(struct gfs2_inode *ip,
75 struct gfs2_ea_request *er,
76 struct gfs2_ea_location *el);
77 int gfs2_ea_get_copy(struct gfs2_inode *ip,
78 struct gfs2_ea_location *el,
80 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
81 struct iattr *attr, char *data);
83 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
85 switch (ea->ea_type) {
87 return (5 + (ea->ea_name_len + 1));
89 return (7 + (ea->ea_name_len + 1));
90 case GFS2_EATYPE_SECURITY:
91 return (9 + (ea->ea_name_len + 1));
97 #endif /* __EATTR_DOT_H__ */