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 91 92/* 93 * connection negotiation 94 */ 95struct ceph_msg_connect { 96 __le64 features; /* supported feature bits */ 97 __le32 host_type; /* CEPH_ENTITY_TYPE_* */ 98 __le32 global_seq; /* count connections initiated by this host */ 99 __le32 connect_seq; /* count connections initiated in this session */ 100 __le32 protocol_version; 101 __le32 authorizer_protocol; 102 __le32 authorizer_len; 103 __u8 flags; /* CEPH_MSG_CONNECT_* */ 104} __attribute__ ((packed)); 105 106struct ceph_msg_connect_reply { 107 __u8 tag; 108 __le64 features; /* feature bits for this session */ 109 __le32 global_seq; 110 __le32 connect_seq; 111 __le32 protocol_version; 112 __le32 authorizer_len; 113 __u8 flags; 114} __attribute__ ((packed)); 115 116#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ 117 118 119/* 120 * message header 121 */ 122struct ceph_msg_header_old { 123 __le64 seq; /* message seq# for this session */ 124 __le64 tid; /* transaction id */ 125 __le16 type; /* message type */ 126 __le16 priority; /* priority. higher value == higher priority */ 127 __le16 version; /* version of message encoding */ 128 129 __le32 front_len; /* bytes in main payload */ 130 __le32 middle_len;/* bytes in middle payload */ 131 __le32 data_len; /* bytes of data payload */ 132 __le16 data_off; /* sender: include full offset; 133 receiver: mask against ~PAGE_MASK */ 134 135 struct ceph_entity_inst src, orig_src; 136 __le32 reserved; 137 __le32 crc; /* header crc32c */ 138} __attribute__ ((packed)); 139 140struct ceph_msg_header { 141 __le64 seq; /* message seq# for this session */ 142 __le64 tid; /* transaction id */ 143 __le16 type; /* message type */ 144 __le16 priority; /* priority. higher value == higher priority */ 145 __le16 version; /* version of message encoding */ 146 147 __le32 front_len; /* bytes in main payload */ 148 __le32 middle_len;/* bytes in middle payload */ 149 __le32 data_len; /* bytes of data payload */ 150 __le16 data_off; /* sender: include full offset; 151 receiver: mask against ~PAGE_MASK */ 152 153 struct ceph_entity_name src; 154 __le32 reserved; 155 __le32 crc; /* header crc32c */ 156} __attribute__ ((packed)); 157 158#define CEPH_MSG_PRIO_LOW 64 159#define CEPH_MSG_PRIO_DEFAULT 127 160#define CEPH_MSG_PRIO_HIGH 196 161#define CEPH_MSG_PRIO_HIGHEST 255 162 163/* 164 * follows data payload 165 */ 166struct ceph_msg_footer { 167 __le32 front_crc, middle_crc, data_crc; 168 __u8 flags; 169} __attribute__ ((packed)); 170 171#define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ 172#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ 173 174 175#endif 176