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1 | #ifndef CEPH_MSGR_H |
2 | #define CEPH_MSGR_H | |
3 | ||
4 | #ifndef __KERNEL__ | |
5 | #include <sys/socket.h> // for struct sockaddr_storage | |
6 | #endif | |
7 | ||
8 | #include "include/int_types.h" | |
9 | ||
10 | /* | |
11 | * Data types for message passing layer used by Ceph. | |
12 | */ | |
13 | ||
14 | #define CEPH_MON_PORT 6789 /* default monitor port */ | |
15 | ||
16 | /* | |
17 | * client-side processes will try to bind to ports in this | |
18 | * range, simply for the benefit of tools like nmap or wireshark | |
19 | * that would like to identify the protocol. | |
20 | */ | |
21 | #define CEPH_PORT_FIRST 6789 | |
22 | ||
23 | /* | |
24 | * tcp connection banner. include a protocol version. and adjust | |
25 | * whenever the wire protocol changes. try to keep this string length | |
26 | * constant. | |
27 | */ | |
28 | #define CEPH_BANNER "ceph v027" | |
29 | ||
30 | /* | |
31 | * Rollover-safe type and comparator for 32-bit sequence numbers. | |
32 | * Comparator returns -1, 0, or 1. | |
33 | */ | |
34 | typedef __u32 ceph_seq_t; | |
35 | ||
36 | static inline __s32 ceph_seq_cmp(__u32 a, __u32 b) | |
37 | { | |
38 | return (__s32)a - (__s32)b; | |
39 | } | |
40 | ||
41 | ||
42 | /* | |
43 | * entity_name -- logical name for a process participating in the | |
44 | * network, e.g. 'mds0' or 'osd3'. | |
45 | */ | |
46 | struct ceph_entity_name { | |
47 | __u8 type; /* CEPH_ENTITY_TYPE_* */ | |
48 | __le64 num; | |
49 | } __attribute__ ((packed)); | |
50 | ||
51 | #define CEPH_ENTITY_TYPE_MON 0x01 | |
52 | #define CEPH_ENTITY_TYPE_MDS 0x02 | |
53 | #define CEPH_ENTITY_TYPE_OSD 0x04 | |
54 | #define CEPH_ENTITY_TYPE_CLIENT 0x08 | |
55 | #define CEPH_ENTITY_TYPE_MGR 0x10 | |
56 | #define CEPH_ENTITY_TYPE_AUTH 0x20 | |
57 | ||
58 | #define CEPH_ENTITY_TYPE_ANY 0xFF | |
59 | ||
60 | extern const char *ceph_entity_type_name(int type); | |
61 | ||
62 | /* | |
63 | * entity_addr -- network address | |
64 | */ | |
65 | struct ceph_entity_addr { | |
66 | __le32 type; | |
67 | __le32 nonce; /* unique id for process (e.g. pid) */ | |
68 | struct sockaddr_storage in_addr; | |
69 | } __attribute__ ((packed)); | |
70 | ||
71 | struct ceph_entity_inst { | |
72 | struct ceph_entity_name name; | |
73 | struct ceph_entity_addr addr; | |
74 | } __attribute__ ((packed)); | |
75 | ||
76 | ||
77 | /* used by message exchange protocol */ | |
78 | #define CEPH_MSGR_TAG_READY 1 /* server->client: ready for messages */ | |
79 | #define CEPH_MSGR_TAG_RESETSESSION 2 /* server->client: reset, try again */ | |
80 | #define CEPH_MSGR_TAG_WAIT 3 /* server->client: wait for racing | |
81 | incoming connection */ | |
82 | #define CEPH_MSGR_TAG_RETRY_SESSION 4 /* server->client + cseq: try again | |
83 | with higher cseq */ | |
84 | #define CEPH_MSGR_TAG_RETRY_GLOBAL 5 /* server->client + gseq: try again | |
85 | with higher gseq */ | |
86 | #define CEPH_MSGR_TAG_CLOSE 6 /* closing pipe */ | |
87 | #define CEPH_MSGR_TAG_MSG 7 /* message */ | |
88 | #define CEPH_MSGR_TAG_ACK 8 /* message ack */ | |
89 | #define CEPH_MSGR_TAG_KEEPALIVE 9 /* just a keepalive byte! */ | |
90 | #define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */ | |
91 | #define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */ | |
92 | #define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */ | |
93 | #define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */ | |
94 | #define CEPH_MSGR_TAG_KEEPALIVE2 14 | |
95 | #define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive reply */ | |
96 | ||
97 | ||
98 | /* | |
99 | * connection negotiation | |
100 | */ | |
101 | struct ceph_msg_connect { | |
102 | __le64 features; /* supported feature bits */ | |
103 | __le32 host_type; /* CEPH_ENTITY_TYPE_* */ | |
104 | __le32 global_seq; /* count connections initiated by this host */ | |
105 | __le32 connect_seq; /* count connections initiated in this session */ | |
106 | __le32 protocol_version; | |
107 | __le32 authorizer_protocol; | |
108 | __le32 authorizer_len; | |
109 | __u8 flags; /* CEPH_MSG_CONNECT_* */ | |
110 | } __attribute__ ((packed)); | |
111 | ||
112 | struct ceph_msg_connect_reply { | |
113 | __u8 tag; | |
114 | __le64 features; /* feature bits for this session */ | |
115 | __le32 global_seq; | |
116 | __le32 connect_seq; | |
117 | __le32 protocol_version; | |
118 | __le32 authorizer_len; | |
119 | __u8 flags; | |
120 | } __attribute__ ((packed)); | |
121 | ||
122 | #define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ | |
123 | ||
124 | ||
125 | /* | |
126 | * message header | |
127 | */ | |
128 | struct ceph_msg_header_old { | |
129 | __le64 seq; /* message seq# for this session */ | |
130 | __le64 tid; /* transaction id */ | |
131 | __le16 type; /* message type */ | |
132 | __le16 priority; /* priority. higher value == higher priority */ | |
133 | __le16 version; /* version of message encoding */ | |
134 | ||
135 | __le32 front_len; /* bytes in main payload */ | |
136 | __le32 middle_len;/* bytes in middle payload */ | |
137 | __le32 data_len; /* bytes of data payload */ | |
138 | __le16 data_off; /* sender: include full offset; | |
139 | receiver: mask against ~PAGE_MASK */ | |
140 | ||
141 | struct ceph_entity_inst src, orig_src; | |
142 | __le32 reserved; | |
143 | __le32 crc; /* header crc32c */ | |
144 | } __attribute__ ((packed)); | |
145 | ||
146 | struct ceph_msg_header { | |
147 | __le64 seq; /* message seq# for this session */ | |
148 | __le64 tid; /* transaction id */ | |
149 | __le16 type; /* message type */ | |
150 | __le16 priority; /* priority. higher value == higher priority */ | |
151 | __le16 version; /* version of message encoding */ | |
152 | ||
153 | __le32 front_len; /* bytes in main payload */ | |
154 | __le32 middle_len;/* bytes in middle payload */ | |
155 | __le32 data_len; /* bytes of data payload */ | |
156 | __le16 data_off; /* sender: include full offset; | |
157 | receiver: mask against ~PAGE_MASK */ | |
158 | ||
159 | struct ceph_entity_name src; | |
160 | ||
161 | /* oldest code we think can decode this. unknown if zero. */ | |
162 | __le16 compat_version; | |
163 | __le16 reserved; | |
164 | __le32 crc; /* header crc32c */ | |
165 | } __attribute__ ((packed)); | |
166 | ||
167 | #define CEPH_MSG_PRIO_LOW 64 | |
168 | #define CEPH_MSG_PRIO_DEFAULT 127 | |
169 | #define CEPH_MSG_PRIO_HIGH 196 | |
170 | #define CEPH_MSG_PRIO_HIGHEST 255 | |
171 | ||
172 | /* | |
173 | * follows data payload | |
174 | * ceph_msg_footer_old does not support digital signatures on messages PLR | |
175 | */ | |
176 | ||
177 | struct ceph_msg_footer_old { | |
178 | __le32 front_crc, middle_crc, data_crc; | |
179 | __u8 flags; | |
180 | } __attribute__ ((packed)); | |
181 | ||
182 | struct ceph_msg_footer { | |
183 | __le32 front_crc, middle_crc, data_crc; | |
184 | // sig holds the 64 bits of the digital signature for the message PLR | |
185 | __le64 sig; | |
186 | __u8 flags; | |
187 | } __attribute__ ((packed)); | |
188 | ||
189 | #define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ | |
190 | #define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ | |
191 | #define CEPH_MSG_FOOTER_SIGNED (1<<2) /* msg was signed */ | |
192 | ||
193 | ||
194 | #endif |