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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 version 2. | |
8 | */ | |
9 | ||
10 | #ifndef __EATTR_DOT_H__ | |
11 | #define __EATTR_DOT_H__ | |
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) \ | |
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) | |
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) \ | |
25 | ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8) | |
26 | ||
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) | |
30 | ||
31 | #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1)) | |
32 | #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len) | |
33 | ||
34 | #define GFS2_EA2DATAPTRS(ea) \ | |
35 | ((uint64_t *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8))) | |
36 | ||
37 | #define GFS2_EA2NEXT(ea) \ | |
38 | ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea))) | |
39 | ||
40 | #define GFS2_EA_BH2FIRST(bh) \ | |
41 | ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header))) | |
42 | ||
43 | #define GFS2_ERF_MODE 0x80000000 | |
44 | ||
45 | struct gfs2_ea_request { | |
46 | char *er_name; | |
47 | char *er_data; | |
48 | unsigned int er_name_len; | |
49 | unsigned int er_data_len; | |
50 | unsigned int er_type; /* GFS2_EATYPE_... */ | |
51 | int er_flags; | |
52 | mode_t er_mode; | |
53 | }; | |
54 | ||
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; | |
59 | }; | |
60 | ||
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); | |
64 | ||
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); | |
69 | ||
70 | int gfs2_ea_dealloc(struct gfs2_inode *ip); | |
71 | ||
72 | /* Exported to acl.c */ | |
73 | ||
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, | |
79 | char *data); | |
80 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
81 | struct iattr *attr, char *data); | |
82 | ||
83 | static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) | |
84 | { | |
85 | switch (ea->ea_type) { | |
86 | case GFS2_EATYPE_USR: | |
87 | return (5 + (ea->ea_name_len + 1)); | |
88 | case GFS2_EATYPE_SYS: | |
89 | return (7 + (ea->ea_name_len + 1)); | |
90 | case GFS2_EATYPE_SECURITY: | |
91 | return (9 + (ea->ea_name_len + 1)); | |
92 | default: | |
93 | return (0); | |
94 | } | |
95 | } | |
96 | ||
97 | #endif /* __EATTR_DOT_H__ */ |