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 version 2.
8 */
9
10 #ifndef __EATTR_DOT_H__
11 #define __EATTR_DOT_H__
12
13 struct gfs2_inode;
14 struct iattr;
15
16 #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
17 #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
18
19 #define GFS2_EA_SIZE(ea) \
20 ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
21 ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
22 (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
23
24 #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
25 #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
26
27 #define GFS2_EAREQ_SIZE_STUFFED(er) \
28 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
29
30 #define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
31 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
32 sizeof(__be64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
33
34 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
35 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
36
37 #define GFS2_EA2DATAPTRS(ea) \
38 ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
39
40 #define GFS2_EA2NEXT(ea) \
41 ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
42
43 #define GFS2_EA_BH2FIRST(bh) \
44 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
45
46 #define GFS2_ERF_MODE 0x80000000
47
48 struct gfs2_ea_request {
49 const char *er_name;
50 char *er_data;
51 unsigned int er_name_len;
52 unsigned int er_data_len;
53 unsigned int er_type; /* GFS2_EATYPE_... */
54 int er_flags;
55 mode_t er_mode;
56 };
57
58 struct gfs2_ea_location {
59 struct buffer_head *el_bh;
60 struct gfs2_ea_header *el_ea;
61 struct gfs2_ea_header *el_prev;
62 };
63
64 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
65 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
66 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
67
68 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
69 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
70 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
71 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
72
73 int gfs2_ea_dealloc(struct gfs2_inode *ip);
74
75 /* Exported to acl.c */
76
77 int gfs2_ea_find(struct gfs2_inode *ip,
78 struct gfs2_ea_request *er,
79 struct gfs2_ea_location *el);
80 int gfs2_ea_get_copy(struct gfs2_inode *ip,
81 struct gfs2_ea_location *el,
82 char *data);
83 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
84 struct iattr *attr, char *data);
85
86 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
87 {
88 switch (ea->ea_type) {
89 case GFS2_EATYPE_USR:
90 return 5 + ea->ea_name_len + 1;
91 case GFS2_EATYPE_SYS:
92 return 7 + ea->ea_name_len + 1;
93 case GFS2_EATYPE_SECURITY:
94 return 9 + ea->ea_name_len + 1;
95 default:
96 return 0;
97 }
98 }
99
100 #endif /* __EATTR_DOT_H__ */
101
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