1 /*
2 * These structs are used by the system-use-sharing protocol, in which the
3 * Rock Ridge extensions are embedded. It is quite possible that other
4 * extensions are present on the disk, and this is fine as long as they
5 * all use SUSP
6 */
7
8 struct SU_SP_s {
9 unsigned char magic[2];
10 unsigned char skip;
11 } __attribute__ ((packed));
12
13 struct SU_CE_s {
14 char extent[8];
15 char offset[8];
16 char size[8];
17 };
18
19 struct SU_ER_s {
20 unsigned char len_id;
21 unsigned char len_des;
22 unsigned char len_src;
23 unsigned char ext_ver;
24 char data[0];
25 } __attribute__ ((packed));
26
27 struct RR_RR_s {
28 char flags[1];
29 } __attribute__ ((packed));
30
31 struct RR_PX_s {
32 char mode[8];
33 char n_links[8];
34 char uid[8];
35 char gid[8];
36 };
37
38 struct RR_PN_s {
39 char dev_high[8];
40 char dev_low[8];
41 };
42
43 struct SL_component {
44 unsigned char flags;
45 unsigned char len;
46 char text[0];
47 } __attribute__ ((packed));
48
49 struct RR_SL_s {
50 unsigned char flags;
51 struct SL_component link;
52 } __attribute__ ((packed));
53
54 struct RR_NM_s {
55 unsigned char flags;
56 char name[0];
57 } __attribute__ ((packed));
58
59 struct RR_CL_s {
60 char location[8];
61 };
62
63 struct RR_PL_s {
64 char location[8];
65 };
66
67 struct stamp {
68 char time[7];
69 } __attribute__ ((packed));
70
71 struct RR_TF_s {
72 char flags;
73 struct stamp times[0]; /* Variable number of these beasts */
74 } __attribute__ ((packed));
75
76 /* Linux-specific extension for transparent decompression */
77 struct RR_ZF_s {
78 char algorithm[2];
79 char parms[2];
80 char real_size[8];
81 };
82
83 /*
84 * These are the bits and their meanings for flags in the TF structure.
85 */
86 #define TF_CREATE 1
87 #define TF_MODIFY 2
88 #define TF_ACCESS 4
89 #define TF_ATTRIBUTES 8
90 #define TF_BACKUP 16
91 #define TF_EXPIRATION 32
92 #define TF_EFFECTIVE 64
93 #define TF_LONG_FORM 128
94
95 struct rock_ridge {
96 char signature[2];
97 unsigned char len;
98 unsigned char version;
99 union {
100 struct SU_SP_s SP;
101 struct SU_CE_s CE;
102 struct SU_ER_s ER;
103 struct RR_RR_s RR;
104 struct RR_PX_s PX;
105 struct RR_PN_s PN;
106 struct RR_SL_s SL;
107 struct RR_NM_s NM;
108 struct RR_CL_s CL;
109 struct RR_PL_s PL;
110 struct RR_TF_s TF;
111 struct RR_ZF_s ZF;
112 } u;
113 };
114
115 #define RR_PX 1 /* POSIX attributes */
116 #define RR_PN 2 /* POSIX devices */
117 #define RR_SL 4 /* Symbolic link */
118 #define RR_NM 8 /* Alternate Name */
119 #define RR_CL 16 /* Child link */
120 #define RR_PL 32 /* Parent link */
121 #define RR_RE 64 /* Relocation directory */
122 #define RR_TF 128 /* Timestamps */
123
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