1#ifndef CEPH_MSGR_H 2#define CEPH_MSGR_H 3 4/* 5 * Data types for message passing layer used by Ceph. 6 */ 7 8#define CEPH_MON_PORT 6789 /* default monitor port */ 9 10/* 11 * client-side processes will try to bind to ports in this 12 * range, simply for the benefit of tools like nmap or wireshark 13 * that would like to identify the protocol. 14 */ 15#define CEPH_PORT_FIRST 6789 16#define CEPH_PORT_START 6800 /* non-monitors start here */ 17#define CEPH_PORT_LAST 6900 18 19/* 20 * tcp connection banner. include a protocol version. and adjust 21 * whenever the wire protocol changes. try to keep this string length 22 * constant. 23 */ 24#define CEPH_BANNER "ceph v027" 25#define CEPH_BANNER_MAX_LEN 30 26 27 28/* 29 * Rollover-safe type and comparator for 32-bit sequence numbers. 30 * Comparator returns -1, 0, or 1. 31 */ 32typedef __u32 ceph_seq_t; 33 34static inline __s32 ceph_seq_cmp(__u32 a, __u32 b) 35{ 36 return (__s32)a - (__s32)b; 37} 38 39 40/* 41 * entity_name -- logical name for a process participating in the 42 * network, e.g. 'mds0' or 'osd3'. 43 */ 44struct ceph_entity_name { 45 __u8 type; /* CEPH_ENTITY_TYPE_* */ 46 __le64 num; 47} __attribute__ ((packed)); 48 49#define CEPH_ENTITY_TYPE_MON 0x01 50#define CEPH_ENTITY_TYPE_MDS 0x02 51#define CEPH_ENTITY_TYPE_OSD 0x04 52#define CEPH_ENTITY_TYPE_CLIENT 0x08 53#define CEPH_ENTITY_TYPE_AUTH 0x20 54 55#define CEPH_ENTITY_TYPE_ANY 0xFF 56 57extern const char *ceph_entity_type_name(int type); 58 59/* 60 * entity_addr -- network address 61 */ 62struct ceph_entity_addr { 63 __le32 type; 64 __le32 nonce; /* unique id for process (e.g. pid) */ 65 struct sockaddr_storage in_addr; 66} __attribute__ ((packed)); 67 68struct ceph_entity_inst { 69 struct ceph_entity_name name; 70 struct ceph_entity_addr addr; 71} __attribute__ ((packed)); 72 73 74/* used by message exchange protocol */ 75#define CEPH_MSGR_TAG_READY 1 /* server->client: ready for messages */ 76#define CEPH_MSGR_TAG_RESETSESSION 2 /* server->client: reset, try again */ 77#define CEPH_MSGR_TAG_WAIT 3 /* server->client: wait for racing 78 incoming connection */ 79#define CEPH_MSGR_TAG_RETRY_SESSION 4 /* server->client + cseq: try again 80 with higher cseq */ 81#define CEPH_MSGR_TAG_RETRY_GLOBAL 5 /* server->client + gseq: try again 82 with higher gseq */ 83#define CEPH_MSGR_TAG_CLOSE 6 /* closing pipe */ 84#define CEPH_MSGR_TAG_MSG 7 /* message */ 85#define CEPH_MSGR_TAG_ACK 8 /* message ack */ 86#define CEPH_MSGR_TAG_KEEPALIVE 9 /* just a keepalive byte! */ 87#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */ 88#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */ 89#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */ 90#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */ 91#define CEPH_MSGR_TAG_KEEPALIVE2 14 /* keepalive2 byte + ceph_timespec */ 92#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */ 93 94 95/* 96 * connection negotiation 97 */ 98struct ceph_msg_connect { 99 __le64 features; /* supported feature bits */ 100 __le32 host_type; /* CEPH_ENTITY_TYPE_* */ 101 __le32 global_seq; /* count connections initiated by this host */ 102 __le32 connect_seq; /* count connections initiated in this session */ 103 __le32 protocol_version; 104 __le32 authorizer_protocol; 105 __le32 authorizer_len; 106 __u8 flags; /* CEPH_MSG_CONNECT_* */ 107} __attribute__ ((packed)); 108 109struct ceph_msg_connect_reply { 110 __u8 tag; 111 __le64 features; /* feature bits for this session */ 112 __le32 global_seq; 113 __le32 connect_seq; 114 __le32 protocol_version; 115 __le32 authorizer_len; 116 __u8 flags; 117} __attribute__ ((packed)); 118 119#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ 120 121 122/* 123 * message header 124 */ 125struct ceph_msg_header_old { 126 __le64 seq; /* message seq# for this session */ 127 __le64 tid; /* transaction id */ 128 __le16 type; /* message type */ 129 __le16 priority; /* priority. higher value == higher priority */ 130 __le16 version; /* version of message encoding */ 131 132 __le32 front_len; /* bytes in main payload */ 133 __le32 middle_len;/* bytes in middle payload */ 134 __le32 data_len; /* bytes of data payload */ 135 __le16 data_off; /* sender: include full offset; 136 receiver: mask against ~PAGE_MASK */ 137 138 struct ceph_entity_inst src, orig_src; 139 __le32 reserved; 140 __le32 crc; /* header crc32c */ 141} __attribute__ ((packed)); 142 143struct ceph_msg_header { 144 __le64 seq; /* message seq# for this session */ 145 __le64 tid; /* transaction id */ 146 __le16 type; /* message type */ 147 __le16 priority; /* priority. higher value == higher priority */ 148 __le16 version; /* version of message encoding */ 149 150 __le32 front_len; /* bytes in main payload */ 151 __le32 middle_len;/* bytes in middle payload */ 152 __le32 data_len; /* bytes of data payload */ 153 __le16 data_off; /* sender: include full offset; 154 receiver: mask against ~PAGE_MASK */ 155 156 struct ceph_entity_name src; 157 __le16 compat_version; 158 __le16 reserved; 159 __le32 crc; /* header crc32c */ 160} __attribute__ ((packed)); 161 162#define CEPH_MSG_PRIO_LOW 64 163#define CEPH_MSG_PRIO_DEFAULT 127 164#define CEPH_MSG_PRIO_HIGH 196 165#define CEPH_MSG_PRIO_HIGHEST 255 166 167/* 168 * follows data payload 169 */ 170struct ceph_msg_footer_old { 171 __le32 front_crc, middle_crc, data_crc; 172 __u8 flags; 173} __attribute__ ((packed)); 174 175struct ceph_msg_footer { 176 __le32 front_crc, middle_crc, data_crc; 177 // sig holds the 64 bits of the digital signature for the message PLR 178 __le64 sig; 179 __u8 flags; 180} __attribute__ ((packed)); 181 182#define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ 183#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ 184#define CEPH_MSG_FOOTER_SIGNED (1<<2) /* msg was signed */ 185 186 187#endif 188