diff options
Diffstat (limited to 'src/include/msgr.h')
| -rw-r--r-- | src/include/msgr.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/include/msgr.h b/src/include/msgr.h new file mode 100644 index 000000000..c8ad48ad1 --- /dev/null +++ b/src/include/msgr.h @@ -0,0 +1,255 @@ +#ifndef CEPH_MSGR_H +#define CEPH_MSGR_H + +#ifndef __KERNEL__ +#include <sys/socket.h> // for struct sockaddr_storage +#endif + +#include "include/int_types.h" + +/* See comment in ceph_fs.h. */ +#ifndef __KERNEL__ +#include "byteorder.h" +#define __le16 ceph_le16 +#define __le32 ceph_le32 +#define __le64 ceph_le64 +#endif + +/* + * Data types for message passing layer used by Ceph. + */ + +#define CEPH_MON_PORT_LEGACY 6789 /* legacy default monitor port */ +#define CEPH_MON_PORT_IANA 3300 /* IANA monitor port */ + +/* + * tcp connection banner. include a protocol version. and adjust + * whenever the wire protocol changes. try to keep this string length + * constant. + */ +#define CEPH_BANNER "ceph v027" + + +/* + * messenger V2 connection banner prefix. + * The full banner string should have the form: "ceph v2\n<le16>" + * the 2 bytes are the length of the remaining banner. + */ +#define CEPH_BANNER_V2_PREFIX "ceph v2\n" + +/* + * messenger V2 features + */ +#define CEPH_MSGR2_INCARNATION_1 (0ull) + +#define DEFINE_MSGR2_FEATURE(bit, incarnation, name) \ + const static uint64_t CEPH_MSGR2_FEATURE_##name = (1ULL << bit); \ + const static uint64_t CEPH_MSGR2_FEATUREMASK_##name = \ + (1ULL << bit | CEPH_MSGR2_INCARNATION_##incarnation); + +#define HAVE_MSGR2_FEATURE(x, name) \ + (((x) & (CEPH_MSGR2_FEATUREMASK_##name)) == (CEPH_MSGR2_FEATUREMASK_##name)) + +DEFINE_MSGR2_FEATURE(0, 1, REVISION_1) // msgr2.1 +DEFINE_MSGR2_FEATURE(1, 1, COMPRESSION) // on-wire compression + +/* + * Features supported. Should be everything above. + */ +#define CEPH_MSGR2_SUPPORTED_FEATURES \ + (CEPH_MSGR2_FEATURE_REVISION_1 | \ + CEPH_MSGR2_FEATURE_COMPRESSION | \ + 0ULL) + +#define CEPH_MSGR2_REQUIRED_FEATURES (0ULL) + + + +/* + * Rollover-safe type and comparator for 32-bit sequence numbers. + * Comparator returns -1, 0, or 1. + */ +typedef __u32 ceph_seq_t; + +static inline __s32 ceph_seq_cmp(__u32 a, __u32 b) +{ + return (__s32)a - (__s32)b; +} + + +/* + * entity_name -- logical name for a process participating in the + * network, e.g. 'mds0' or 'osd3'. + */ +struct ceph_entity_name { + __u8 type; /* CEPH_ENTITY_TYPE_* */ + __le64 num; +} __attribute__ ((packed)); + +#define CEPH_ENTITY_TYPE_MON 0x01 +#define CEPH_ENTITY_TYPE_MDS 0x02 +#define CEPH_ENTITY_TYPE_OSD 0x04 +#define CEPH_ENTITY_TYPE_CLIENT 0x08 +#define CEPH_ENTITY_TYPE_MGR 0x10 +#define CEPH_ENTITY_TYPE_AUTH 0x20 + +#define CEPH_ENTITY_TYPE_ANY 0xFF + +extern const char *ceph_entity_type_name(int type); + +/* + * entity_addr -- network address + */ +struct ceph_entity_addr { + __le32 type; + __le32 nonce; /* unique id for process (e.g. pid) */ + struct sockaddr_storage in_addr; +} __attribute__ ((packed)); + +struct ceph_entity_inst { + struct ceph_entity_name name; + struct ceph_entity_addr addr; +} __attribute__ ((packed)); + + +/* used by message exchange protocol */ +#define CEPH_MSGR_TAG_READY 1 /* server->client: ready for messages */ +#define CEPH_MSGR_TAG_RESETSESSION 2 /* server->client: reset, try again */ +#define CEPH_MSGR_TAG_WAIT 3 /* server->client: wait for racing + incoming connection */ +#define CEPH_MSGR_TAG_RETRY_SESSION 4 /* server->client + cseq: try again + with higher cseq */ +#define CEPH_MSGR_TAG_RETRY_GLOBAL 5 /* server->client + gseq: try again + with higher gseq */ +#define CEPH_MSGR_TAG_CLOSE 6 /* closing pipe */ +#define CEPH_MSGR_TAG_MSG 7 /* message */ +#define CEPH_MSGR_TAG_ACK 8 /* message ack */ +#define CEPH_MSGR_TAG_KEEPALIVE 9 /* just a keepalive byte! */ +#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */ +#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */ +#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */ +#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */ +#define CEPH_MSGR_TAG_KEEPALIVE2 14 +#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive reply */ +#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16 /* ceph v2 doing server challenge */ + +/* + * connection negotiation + */ +struct ceph_msg_connect { + __le64 features; /* supported feature bits */ + __le32 host_type; /* CEPH_ENTITY_TYPE_* */ + __le32 global_seq; /* count connections initiated by this host */ + __le32 connect_seq; /* count connections initiated in this session */ + __le32 protocol_version; + __le32 authorizer_protocol; + __le32 authorizer_len; + __u8 flags; /* CEPH_MSG_CONNECT_* */ +} __attribute__ ((packed)); + +struct ceph_msg_connect_reply { + __u8 tag; + __le64 features; /* feature bits for this session */ + __le32 global_seq; + __le32 connect_seq; + __le32 protocol_version; + __le32 authorizer_len; + __u8 flags; +} __attribute__ ((packed)); + +#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ + + +/* + * message header + */ +struct ceph_msg_header_old { + __le64 seq; /* message seq# for this session */ + __le64 tid; /* transaction id */ + __le16 type; /* message type */ + __le16 priority; /* priority. higher value == higher priority */ + __le16 version; /* version of message encoding */ + + __le32 front_len; /* bytes in main payload */ + __le32 middle_len;/* bytes in middle payload */ + __le32 data_len; /* bytes of data payload */ + __le16 data_off; /* sender: include full offset; + receiver: mask against ~PAGE_MASK */ + + struct ceph_entity_inst src, orig_src; + __le32 reserved; + __le32 crc; /* header crc32c */ +} __attribute__ ((packed)); + +struct ceph_msg_header { + __le64 seq; /* message seq# for this session */ + __le64 tid; /* transaction id */ + __le16 type; /* message type */ + __le16 priority; /* priority. higher value == higher priority */ + __le16 version; /* version of message encoding */ + + __le32 front_len; /* bytes in main payload */ + __le32 middle_len;/* bytes in middle payload */ + __le32 data_len; /* bytes of data payload */ + __le16 data_off; /* sender: include full offset; + receiver: mask against ~PAGE_MASK */ + + struct ceph_entity_name src; + + /* oldest code we think can decode this. unknown if zero. */ + __le16 compat_version; + __le16 reserved; + __le32 crc; /* header crc32c */ +} __attribute__ ((packed)); + +struct ceph_msg_header2 { + __le64 seq; /* message seq# for this session */ + __le64 tid; /* transaction id */ + __le16 type; /* message type */ + __le16 priority; /* priority. higher value == higher priority */ + __le16 version; /* version of message encoding */ + + __le32 data_pre_padding_len; + __le16 data_off; /* sender: include full offset; + receiver: mask against ~PAGE_MASK */ + + __le64 ack_seq; + __u8 flags; + /* oldest code we think can decode this. unknown if zero. */ + __le16 compat_version; + __le16 reserved; +} __attribute__ ((packed)); + +#define CEPH_MSG_PRIO_LOW 64 +#define CEPH_MSG_PRIO_DEFAULT 127 +#define CEPH_MSG_PRIO_HIGH 196 +#define CEPH_MSG_PRIO_HIGHEST 255 + +/* + * follows data payload + * ceph_msg_footer_old does not support digital signatures on messages PLR + */ + +struct ceph_msg_footer_old { + __le32 front_crc, middle_crc, data_crc; + __u8 flags; +} __attribute__ ((packed)); + +struct ceph_msg_footer { + __le32 front_crc, middle_crc, data_crc; + // sig holds the 64 bits of the digital signature for the message PLR + __le64 sig; + __u8 flags; +} __attribute__ ((packed)); + +#define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ +#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ +#define CEPH_MSG_FOOTER_SIGNED (1<<2) /* msg was signed */ + +#ifndef __KERNEL__ +#undef __le16 +#undef __le32 +#undef __le64 +#endif + +#endif |