projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b411b363 PR |
1 | #ifndef DRBD_TAG_MAGIC_H |
| 2 | #define DRBD_TAG_MAGIC_H | |
| 3 | ||
| 4 | #define TT_END 0 | |
| 5 | #define TT_REMOVED 0xE000 | |
| 6 | ||
| 7 | /* declare packet_type enums */ | |
| 8 | enum packet_types { | |
| 9 | #define NL_PACKET(name, number, fields) P_ ## name = number, | |
| 10 | #define NL_INTEGER(pn, pr, member) | |
| 11 | #define NL_INT64(pn, pr, member) | |
| 12 | #define NL_BIT(pn, pr, member) | |
| 13 | #define NL_STRING(pn, pr, member, len) | |
| 14 | #include "drbd_nl.h" | |
| 15 | P_nl_after_last_packet, | |
| 16 | }; | |
| 17 | ||
| 18 | /* These struct are used to deduce the size of the tag lists: */ | |
| 19 | #define NL_PACKET(name, number, fields) \ | |
| 20 | struct name ## _tag_len_struct { fields }; | |
| 21 | #define NL_INTEGER(pn, pr, member) \ | |
| 22 | int member; int tag_and_len ## member; | |
| 23 | #define NL_INT64(pn, pr, member) \ | |
| 24 | __u64 member; int tag_and_len ## member; | |
| 25 | #define NL_BIT(pn, pr, member) \ | |
| 26 | unsigned char member:1; int tag_and_len ## member; | |
| 27 | #define NL_STRING(pn, pr, member, len) \ | |
| 28 | unsigned char member[len]; int member ## _len; \ | |
| 29 | int tag_and_len ## member; | |
| 30 | #include "linux/drbd_nl.h" | |
| 31 | ||
| 32 | /* declate tag-list-sizes */ | |
| 33 | static const int tag_list_sizes[] = { | |
| 34 | #define NL_PACKET(name, number, fields) 2 fields , | |
| 35 | #define NL_INTEGER(pn, pr, member) + 4 + 4 | |
| 36 | #define NL_INT64(pn, pr, member) + 4 + 8 | |
| 37 | #define NL_BIT(pn, pr, member) + 4 + 1 | |
| 38 | #define NL_STRING(pn, pr, member, len) + 4 + (len) | |
| 39 | #include "drbd_nl.h" | |
| 40 | }; | |
| 41 | ||
| 42 | /* The two highest bits are used for the tag type */ | |
| 43 | #define TT_MASK 0xC000 | |
| 44 | #define TT_INTEGER 0x0000 | |
| 45 | #define TT_INT64 0x4000 | |
| 46 | #define TT_BIT 0x8000 | |
| 47 | #define TT_STRING 0xC000 | |
| 48 | /* The next bit indicates if processing of the tag is mandatory */ | |
| 49 | #define T_MANDATORY 0x2000 | |
| 50 | #define T_MAY_IGNORE 0x0000 | |
| 51 | #define TN_MASK 0x1fff | |
| 52 | /* The remaining 13 bits are used to enumerate the tags */ | |
| 53 | ||
| 54 | #define tag_type(T) ((T) & TT_MASK) | |
| 55 | #define tag_number(T) ((T) & TN_MASK) | |
| 56 | ||
| 57 | /* declare tag enums */ | |
| 58 | #define NL_PACKET(name, number, fields) fields | |
| 59 | enum drbd_tags { | |
| 60 | #define NL_INTEGER(pn, pr, member) T_ ## member = pn | TT_INTEGER | pr , | |
| 61 | #define NL_INT64(pn, pr, member) T_ ## member = pn | TT_INT64 | pr , | |
| 62 | #define NL_BIT(pn, pr, member) T_ ## member = pn | TT_BIT | pr , | |
| 63 | #define NL_STRING(pn, pr, member, len) T_ ## member = pn | TT_STRING | pr , | |
| 64 | #include "drbd_nl.h" | |
| 65 | }; | |
| 66 | ||
| 67 | struct tag { | |
| 68 | const char *name; | |
| 69 | int type_n_flags; | |
| 70 | int max_len; | |
| 71 | }; | |
| 72 | ||
| 73 | /* declare tag names */ | |
| 74 | #define NL_PACKET(name, number, fields) fields | |
| 75 | static const struct tag tag_descriptions[] = { | |
| 76 | #define NL_INTEGER(pn, pr, member) [ pn ] = { #member, TT_INTEGER | pr, sizeof(int) }, | |
| 77 | #define NL_INT64(pn, pr, member) [ pn ] = { #member, TT_INT64 | pr, sizeof(__u64) }, | |
| 78 | #define NL_BIT(pn, pr, member) [ pn ] = { #member, TT_BIT | pr, sizeof(int) }, | |
| 79 | #define NL_STRING(pn, pr, member, len) [ pn ] = { #member, TT_STRING | pr, (len) }, | |
| 80 | #include "drbd_nl.h" | |
| 81 | }; | |
| 82 | ||
| 83 | #endif |