b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100 1) /* SPDX-License-Identifier: GPL-2.0 */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 2) /*
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 3) * These structs are used by the system-use-sharing protocol, in which the
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 4) * Rock Ridge extensions are embedded. It is quite possible that other
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 5) * extensions are present on the disk, and this is fine as long as they
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 6) * all use SUSP
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 7) */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 8)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 9) struct SU_SP_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 10) __u8 magic[2];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 11) __u8 skip;
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 12) } __attribute__ ((packed));
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 13)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 14) struct SU_CE_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 15) __u8 extent[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 16) __u8 offset[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 17) __u8 size[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 20) struct SU_ER_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 21) __u8 len_id;
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 22) __u8 len_des;
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 23) __u8 len_src;
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 24) __u8 ext_ver;
5e01fdff04b7f (Gustavo A. R. Silva 2020-08-31 08:25:42 -0500 25) __u8 data[];
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 26) } __attribute__ ((packed));
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 27)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 28) struct RR_RR_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 29) __u8 flags[1];
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 30) } __attribute__ ((packed));
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 31)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 32) struct RR_PX_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 33) __u8 mode[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 34) __u8 n_links[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 35) __u8 uid[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 36) __u8 gid[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 38)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 39) struct RR_PN_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 40) __u8 dev_high[8];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 41) __u8 dev_low[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 42) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43)
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 44) struct SL_component {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 45) __u8 flags;
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 46) __u8 len;
5e01fdff04b7f (Gustavo A. R. Silva 2020-08-31 08:25:42 -0500 47) __u8 text[];
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 48) } __attribute__ ((packed));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 50) struct RR_SL_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 51) __u8 flags;
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 52) struct SL_component link;
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 53) } __attribute__ ((packed));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 55) struct RR_NM_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 56) __u8 flags;
5e01fdff04b7f (Gustavo A. R. Silva 2020-08-31 08:25:42 -0500 57) char name[];
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 58) } __attribute__ ((packed));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 59)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 60) struct RR_CL_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 61) __u8 location[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 63)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 64) struct RR_PL_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 65) __u8 location[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 66) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67)
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 68) struct stamp {
34be4dbf87fc3 (Arnd Bergmann 2017-10-19 16:47:48 +0200 69) __u8 time[7]; /* actually 6 unsigned, 1 signed */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 70) } __attribute__ ((packed));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71)
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 72) struct RR_TF_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 73) __u8 flags;
5e01fdff04b7f (Gustavo A. R. Silva 2020-08-31 08:25:42 -0500 74) struct stamp times[]; /* Variable number of these beasts */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 75) } __attribute__ ((packed));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 76)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 77) /* Linux-specific extension for transparent decompression */
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 78) struct RR_ZF_s {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 79) __u8 algorithm[2];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 80) __u8 parms[2];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 81) __u8 real_size[8];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 82) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 83)
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 84) /*
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 85) * These are the bits and their meanings for flags in the TF structure.
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 86) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 87) #define TF_CREATE 1
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 88) #define TF_MODIFY 2
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 89) #define TF_ACCESS 4
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 90) #define TF_ATTRIBUTES 8
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) #define TF_BACKUP 16
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 92) #define TF_EXPIRATION 32
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93) #define TF_EFFECTIVE 64
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94) #define TF_LONG_FORM 128
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95)
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 96) struct rock_ridge {
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 97) __u8 signature[2];
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 98) __u8 len;
cb91775711b2f (Arnd Bergmann 2017-10-19 16:47:49 +0200 99) __u8 version;
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 100) union {
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 101) struct SU_SP_s SP;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 102) struct SU_CE_s CE;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 103) struct SU_ER_s ER;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 104) struct RR_RR_s RR;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 105) struct RR_PX_s PX;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 106) struct RR_PN_s PN;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 107) struct RR_SL_s SL;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 108) struct RR_NM_s NM;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 109) struct RR_CL_s CL;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 110) struct RR_PL_s PL;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 111) struct RR_TF_s TF;
642217c17b9a5 (Andrew Morton 2005-06-21 17:16:51 -0700 112) struct RR_ZF_s ZF;
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 113) } u;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 115)
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 116) #define RR_PX 1 /* POSIX attributes */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 117) #define RR_PN 2 /* POSIX devices */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 118) #define RR_SL 4 /* Symbolic link */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 119) #define RR_NM 8 /* Alternate Name */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 120) #define RR_CL 16 /* Child link */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 121) #define RR_PL 32 /* Parent link */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 122) #define RR_RE 64 /* Relocation directory */
a089221c5e8a5 (Andrew Morton 2005-06-21 17:16:48 -0700 123) #define RR_TF 128 /* Timestamps */
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