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1da177e4 LT |
1 | /* These structs are used by the system-use-sharing protocol, in which the |
2 | Rock Ridge extensions are embedded. It is quite possible that other | |
3 | extensions are present on the disk, and this is fine as long as they | |
4 | all use SUSP */ | |
5 | ||
6 | struct SU_SP{ | |
7 | unsigned char magic[2]; | |
8 | unsigned char skip; | |
9 | } __attribute__((packed)); | |
10 | ||
11 | struct SU_CE{ | |
12 | char extent[8]; | |
13 | char offset[8]; | |
14 | char size[8]; | |
15 | }; | |
16 | ||
17 | struct SU_ER{ | |
18 | unsigned char len_id; | |
19 | unsigned char len_des; | |
20 | unsigned char len_src; | |
21 | unsigned char ext_ver; | |
22 | char data[0]; | |
23 | } __attribute__((packed)); | |
24 | ||
25 | struct RR_RR{ | |
26 | char flags[1]; | |
27 | } __attribute__((packed)); | |
28 | ||
29 | struct RR_PX{ | |
30 | char mode[8]; | |
31 | char n_links[8]; | |
32 | char uid[8]; | |
33 | char gid[8]; | |
34 | }; | |
35 | ||
36 | struct RR_PN{ | |
37 | char dev_high[8]; | |
38 | char dev_low[8]; | |
39 | }; | |
40 | ||
41 | ||
42 | struct SL_component{ | |
43 | unsigned char flags; | |
44 | unsigned char len; | |
45 | char text[0]; | |
46 | } __attribute__((packed)); | |
47 | ||
48 | struct RR_SL{ | |
49 | unsigned char flags; | |
50 | struct SL_component link; | |
51 | } __attribute__((packed)); | |
52 | ||
53 | struct RR_NM{ | |
54 | unsigned char flags; | |
55 | char name[0]; | |
56 | } __attribute__((packed)); | |
57 | ||
58 | struct RR_CL{ | |
59 | char location[8]; | |
60 | }; | |
61 | ||
62 | struct RR_PL{ | |
63 | char location[8]; | |
64 | }; | |
65 | ||
66 | struct stamp{ | |
67 | char time[7]; | |
68 | } __attribute__((packed)); | |
69 | ||
70 | struct RR_TF{ | |
71 | char flags; | |
72 | struct stamp times[0]; /* Variable number of these beasts */ | |
73 | } __attribute__((packed)); | |
74 | ||
75 | /* Linux-specific extension for transparent decompression */ | |
76 | struct RR_ZF{ | |
77 | char algorithm[2]; | |
78 | char parms[2]; | |
79 | char real_size[8]; | |
80 | }; | |
81 | ||
82 | /* These are the bits and their meanings for flags in the TF structure. */ | |
83 | #define TF_CREATE 1 | |
84 | #define TF_MODIFY 2 | |
85 | #define TF_ACCESS 4 | |
86 | #define TF_ATTRIBUTES 8 | |
87 | #define TF_BACKUP 16 | |
88 | #define TF_EXPIRATION 32 | |
89 | #define TF_EFFECTIVE 64 | |
90 | #define TF_LONG_FORM 128 | |
91 | ||
92 | struct rock_ridge{ | |
93 | char signature[2]; | |
94 | unsigned char len; | |
95 | unsigned char version; | |
96 | union{ | |
97 | struct SU_SP SP; | |
98 | struct SU_CE CE; | |
99 | struct SU_ER ER; | |
100 | struct RR_RR RR; | |
101 | struct RR_PX PX; | |
102 | struct RR_PN PN; | |
103 | struct RR_SL SL; | |
104 | struct RR_NM NM; | |
105 | struct RR_CL CL; | |
106 | struct RR_PL PL; | |
107 | struct RR_TF TF; | |
108 | struct RR_ZF ZF; | |
109 | } u; | |
110 | }; | |
111 | ||
112 | #define RR_PX 1 /* POSIX attributes */ | |
113 | #define RR_PN 2 /* POSIX devices */ | |
114 | #define RR_SL 4 /* Symbolic link */ | |
115 | #define RR_NM 8 /* Alternate Name */ | |
116 | #define RR_CL 16 /* Child link */ | |
117 | #define RR_PL 32 /* Parent link */ | |
118 | #define RR_RE 64 /* Relocation directory */ | |
119 | #define RR_TF 128 /* Timestamps */ |