124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* These structs are used by the system-use-sharing protocol, in which the
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* Rock Ridge extensions are embedded. It is quite possible that other
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* extensions are present on the disk, and this is fine as long as they
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* all use SUSP
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*/
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struct SU_SP_s {
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unsigned char magic[2];
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unsigned char skip;
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} __attribute__ ((packed));
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struct SU_CE_s {
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char extent[8];
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char offset[8];
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char size[8];
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};
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struct SU_ER_s {
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unsigned char len_id;
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unsigned char len_des;
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unsigned char len_src;
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unsigned char ext_ver;
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char data[0];
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} __attribute__ ((packed));
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struct RR_RR_s {
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char flags[1];
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} __attribute__ ((packed));
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struct RR_PX_s {
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char mode[8];
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char n_links[8];
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char uid[8];
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char gid[8];
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};
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struct RR_PN_s {
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char dev_high[8];
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char dev_low[8];
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};
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struct SL_component {
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unsigned char flags;
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unsigned char len;
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char text[0];
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} __attribute__ ((packed));
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struct RR_SL_s {
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unsigned char flags;
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struct SL_component link;
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} __attribute__ ((packed));
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struct RR_NM_s {
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unsigned char flags;
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char name[0];
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} __attribute__ ((packed));
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struct RR_CL_s {
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char location[8];
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};
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struct RR_PL_s {
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char location[8];
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};
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struct stamp {
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char time[7];
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} __attribute__ ((packed));
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struct RR_TF_s {
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char flags;
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struct stamp times[0]; /* Variable number of these beasts */
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} __attribute__ ((packed));
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/* Linux-specific extension for transparent decompression */
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struct RR_ZF_s {
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char algorithm[2];
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char parms[2];
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char real_size[8];
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};
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/*
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* These are the bits and their meanings for flags in the TF structure.
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*/
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#define TF_CREATE 1
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#define TF_MODIFY 2
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#define TF_ACCESS 4
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#define TF_ATTRIBUTES 8
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#define TF_BACKUP 16
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#define TF_EXPIRATION 32
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#define TF_EFFECTIVE 64
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#define TF_LONG_FORM 128
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struct rock_ridge {
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char signature[2];
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unsigned char len;
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unsigned char version;
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union {
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struct SU_SP_s SP;
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struct SU_CE_s CE;
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struct SU_ER_s ER;
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struct RR_RR_s RR;
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struct RR_PX_s PX;
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struct RR_PN_s PN;
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struct RR_SL_s SL;
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struct RR_NM_s NM;
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struct RR_CL_s CL;
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struct RR_PL_s PL;
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struct RR_TF_s TF;
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struct RR_ZF_s ZF;
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} u;
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};
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#define RR_PX 1 /* POSIX attributes */
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#define RR_PN 2 /* POSIX devices */
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#define RR_SL 4 /* Symbolic link */
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#define RR_NM 8 /* Alternate Name */
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#define RR_CL 16 /* Child link */
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#define RR_PL 32 /* Parent link */
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#define RR_RE 64 /* Relocation directory */
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#define RR_TF 128 /* Timestamps */
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