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Diffstat (limited to '')
-rw-r--r-- | fs/isofs/rock.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/fs/isofs/rock.h b/fs/isofs/rock.h new file mode 100644 index 0000000000..ee9660e967 --- /dev/null +++ b/fs/isofs/rock.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * These structs are used by the system-use-sharing protocol, in which the + * Rock Ridge extensions are embedded. It is quite possible that other + * extensions are present on the disk, and this is fine as long as they + * all use SUSP + */ + +struct SU_SP_s { + __u8 magic[2]; + __u8 skip; +} __attribute__ ((packed)); + +struct SU_CE_s { + __u8 extent[8]; + __u8 offset[8]; + __u8 size[8]; +}; + +struct SU_ER_s { + __u8 len_id; + __u8 len_des; + __u8 len_src; + __u8 ext_ver; + __u8 data[]; +} __attribute__ ((packed)); + +struct RR_RR_s { + __u8 flags[1]; +} __attribute__ ((packed)); + +struct RR_PX_s { + __u8 mode[8]; + __u8 n_links[8]; + __u8 uid[8]; + __u8 gid[8]; +}; + +struct RR_PN_s { + __u8 dev_high[8]; + __u8 dev_low[8]; +}; + +struct SL_component { + __u8 flags; + __u8 len; + __u8 text[]; +} __attribute__ ((packed)); + +struct RR_SL_s { + __u8 flags; + struct SL_component link; +} __attribute__ ((packed)); + +struct RR_NM_s { + __u8 flags; + char name[]; +} __attribute__ ((packed)); + +struct RR_CL_s { + __u8 location[8]; +}; + +struct RR_PL_s { + __u8 location[8]; +}; + +struct stamp { + __u8 time[7]; /* actually 6 unsigned, 1 signed */ +} __attribute__ ((packed)); + +struct RR_TF_s { + __u8 flags; + struct stamp times[]; /* Variable number of these beasts */ +} __attribute__ ((packed)); + +/* Linux-specific extension for transparent decompression */ +struct RR_ZF_s { + __u8 algorithm[2]; + __u8 parms[2]; + __u8 real_size[8]; +}; + +/* + * These are the bits and their meanings for flags in the TF structure. + */ +#define TF_CREATE 1 +#define TF_MODIFY 2 +#define TF_ACCESS 4 +#define TF_ATTRIBUTES 8 +#define TF_BACKUP 16 +#define TF_EXPIRATION 32 +#define TF_EFFECTIVE 64 +#define TF_LONG_FORM 128 + +struct rock_ridge { + __u8 signature[2]; + __u8 len; + __u8 version; + union { + struct SU_SP_s SP; + struct SU_CE_s CE; + struct SU_ER_s ER; + struct RR_RR_s RR; + struct RR_PX_s PX; + struct RR_PN_s PN; + struct RR_SL_s SL; + struct RR_NM_s NM; + struct RR_CL_s CL; + struct RR_PL_s PL; + struct RR_TF_s TF; + struct RR_ZF_s ZF; + } u; +}; + +#define RR_PX 1 /* POSIX attributes */ +#define RR_PN 2 /* POSIX devices */ +#define RR_SL 4 /* Symbolic link */ +#define RR_NM 8 /* Alternate Name */ +#define RR_CL 16 /* Child link */ +#define RR_PL 32 /* Parent link */ +#define RR_RE 64 /* Relocation directory */ +#define RR_TF 128 /* Timestamps */ |