diff options
Diffstat (limited to 'include/linux/drbd_tag_magic.h')
-rw-r--r-- | include/linux/drbd_tag_magic.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/include/linux/drbd_tag_magic.h b/include/linux/drbd_tag_magic.h new file mode 100644 index 00000000000..fcdff8410e9 --- /dev/null +++ b/include/linux/drbd_tag_magic.h | |||
@@ -0,0 +1,83 @@ | |||
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 | ||