blob: f835976ce03339ac72939565c94c90cd9d9c9b12 [file] [log] [blame]
Andrew Mortona0892212005-06-21 17:16:48 -07001/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
Andrew Morton642217c2005-06-21 17:16:51 -07008struct SU_SP_s {
Andrew Mortona0892212005-06-21 17:16:48 -07009 unsigned char magic[2];
10 unsigned char skip;
11} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
Andrew Morton642217c2005-06-21 17:16:51 -070013struct SU_CE_s {
Andrew Mortona0892212005-06-21 17:16:48 -070014 char extent[8];
15 char offset[8];
16 char size[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070017};
18
Andrew Morton642217c2005-06-21 17:16:51 -070019struct SU_ER_s {
Andrew Mortona0892212005-06-21 17:16:48 -070020 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));
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Andrew Morton642217c2005-06-21 17:16:51 -070027struct RR_RR_s {
Andrew Mortona0892212005-06-21 17:16:48 -070028 char flags[1];
29} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Andrew Morton642217c2005-06-21 17:16:51 -070031struct RR_PX_s {
Andrew Mortona0892212005-06-21 17:16:48 -070032 char mode[8];
33 char n_links[8];
34 char uid[8];
35 char gid[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070036};
37
Andrew Morton642217c2005-06-21 17:16:51 -070038struct RR_PN_s {
Andrew Mortona0892212005-06-21 17:16:48 -070039 char dev_high[8];
40 char dev_low[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070041};
42
Andrew Mortona0892212005-06-21 17:16:48 -070043struct SL_component {
44 unsigned char flags;
45 unsigned char len;
46 char text[0];
47} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Andrew Morton642217c2005-06-21 17:16:51 -070049struct RR_SL_s {
Andrew Mortona0892212005-06-21 17:16:48 -070050 unsigned char flags;
51 struct SL_component link;
52} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Andrew Morton642217c2005-06-21 17:16:51 -070054struct RR_NM_s {
Andrew Mortona0892212005-06-21 17:16:48 -070055 unsigned char flags;
56 char name[0];
57} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Andrew Morton642217c2005-06-21 17:16:51 -070059struct RR_CL_s {
Andrew Mortona0892212005-06-21 17:16:48 -070060 char location[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070061};
62
Andrew Morton642217c2005-06-21 17:16:51 -070063struct RR_PL_s {
Andrew Mortona0892212005-06-21 17:16:48 -070064 char location[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070065};
66
Andrew Mortona0892212005-06-21 17:16:48 -070067struct stamp {
Arnd Bergmannaffd1592017-10-19 16:47:48 +020068 __u8 time[7]; /* actually 6 unsigned, 1 signed */
Andrew Mortona0892212005-06-21 17:16:48 -070069} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Andrew Morton642217c2005-06-21 17:16:51 -070071struct RR_TF_s {
Andrew Mortona0892212005-06-21 17:16:48 -070072 char flags;
73 struct stamp times[0]; /* Variable number of these beasts */
74} __attribute__ ((packed));
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76/* Linux-specific extension for transparent decompression */
Andrew Morton642217c2005-06-21 17:16:51 -070077struct RR_ZF_s {
Andrew Mortona0892212005-06-21 17:16:48 -070078 char algorithm[2];
79 char parms[2];
80 char real_size[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
Andrew Mortona0892212005-06-21 17:16:48 -070083/*
84 * These are the bits and their meanings for flags in the TF structure.
85 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070086#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
Andrew Mortona0892212005-06-21 17:16:48 -070095struct rock_ridge {
96 char signature[2];
97 unsigned char len;
98 unsigned char version;
99 union {
Andrew Morton642217c2005-06-21 17:16:51 -0700100 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;
Andrew Mortona0892212005-06-21 17:16:48 -0700112 } u;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113};
114
Andrew Mortona0892212005-06-21 17:16:48 -0700115#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 */