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 92 93/* 94 * connection negotiation 95 */ 96struct ceph_msg_connect { 97 __le64 features; /* supported feature bits */ 98 __le32 host_type; /* CEPH_ENTITY_TYPE_* */ 99 __le32 global_seq; /* count connections initiated by this host */ 100 __le32 connect_seq; /* count connections initiated in this session */ 101 __le32 protocol_version; 102 __le32 authorizer_protocol; 103 __le32 authorizer_len; 104 __u8 flags; /* CEPH_MSG_CONNECT_* */ 105} __attribute__ ((packed)); 106 107struct ceph_msg_connect_reply { 108 __u8 tag; 109 __le64 features; /* feature bits for this session */ 110 __le32 global_seq; 111 __le32 connect_seq; 112 __le32 protocol_version; 113 __le32 authorizer_len; 114 __u8 flags; 115} __attribute__ ((packed)); 116 117#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ 118 119 120/* 121 * message header 122 */ 123struct ceph_msg_header_old { 124 __le64 seq; /* message seq# for this session */ 125 __le64 tid; /* transaction id */ 126 __le16 type; /* message type */ 127 __le16 priority; /* priority. higher value == higher priority */ 128 __le16 version; /* version of message encoding */ 129 130 __le32 front_len; /* bytes in main payload */ 131 __le32 middle_len;/* bytes in middle payload */ 132 __le32 data_len; /* bytes of data payload */ 133 __le16 data_off; /* sender: include full offset; 134 receiver: mask against ~PAGE_MASK */ 135 136 struct ceph_entity_inst src, orig_src; 137 __le32 reserved; 138 __le32 crc; /* header crc32c */ 139} __attribute__ ((packed)); 140 141struct ceph_msg_header { 142 __le64 seq; /* message seq# for this session */ 143 __le64 tid; /* transaction id */ 144 __le16 type; /* message type */ 145 __le16 priority; /* priority. higher value == higher priority */ 146 __le16 version; /* version of message encoding */ 147 148 __le32 front_len; /* bytes in main payload */ 149 __le32 middle_len;/* bytes in middle payload */ 150 __le32 data_len; /* bytes of data payload */ 151 __le16 data_off; /* sender: include full offset; 152 receiver: mask against ~PAGE_MASK */ 153 154 struct ceph_entity_name src; 155 __le32 reserved; 156 __le32 crc; /* header crc32c */ 157} __attribute__ ((packed)); 158 159#define CEPH_MSG_PRIO_LOW 64 160#define CEPH_MSG_PRIO_DEFAULT 127 161#define CEPH_MSG_PRIO_HIGH 196 162#define CEPH_MSG_PRIO_HIGHEST 255 163 164/* 165 * follows data payload 166 */ 167struct ceph_msg_footer { 168 __le32 front_crc, middle_crc, data_crc; 169 __u8 flags; 170} __attribute__ ((packed)); 171 172#define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ 173#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ 174 175 176#endif 177