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234 lines
7.2 KiB
234 lines
7.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef CEPH_MSGR_H |
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#define CEPH_MSGR_H |
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/* |
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* Data types for message passing layer used by Ceph. |
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*/ |
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#define CEPH_MON_PORT 6789 /* default monitor port */ |
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/* |
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* tcp connection banner. include a protocol version. and adjust |
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* whenever the wire protocol changes. try to keep this string length |
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* constant. |
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*/ |
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#define CEPH_BANNER "ceph v027" |
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#define CEPH_BANNER_LEN 9 |
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#define CEPH_BANNER_MAX_LEN 30 |
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/* |
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* messenger V2 connection banner prefix. |
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* The full banner string should have the form: "ceph v2\n<le16>" |
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* the 2 bytes are the length of the remaining banner. |
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*/ |
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#define CEPH_BANNER_V2 "ceph v2\n" |
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#define CEPH_BANNER_V2_LEN 8 |
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#define CEPH_BANNER_V2_PREFIX_LEN (CEPH_BANNER_V2_LEN + sizeof(__le16)) |
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/* |
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* messenger V2 features |
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*/ |
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#define CEPH_MSGR2_INCARNATION_1 (0ull) |
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#define DEFINE_MSGR2_FEATURE(bit, incarnation, name) \ |
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static const uint64_t __maybe_unused CEPH_MSGR2_FEATURE_##name = (1ULL << bit); \ |
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static const uint64_t __maybe_unused CEPH_MSGR2_FEATUREMASK_##name = \ |
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(1ULL << bit | CEPH_MSGR2_INCARNATION_##incarnation); |
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#define HAVE_MSGR2_FEATURE(x, name) \ |
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(((x) & (CEPH_MSGR2_FEATUREMASK_##name)) == (CEPH_MSGR2_FEATUREMASK_##name)) |
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DEFINE_MSGR2_FEATURE( 0, 1, REVISION_1) // msgr2.1 |
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#define CEPH_MSGR2_SUPPORTED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1) |
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#define CEPH_MSGR2_REQUIRED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1) |
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/* |
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* Rollover-safe type and comparator for 32-bit sequence numbers. |
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* Comparator returns -1, 0, or 1. |
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*/ |
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typedef __u32 ceph_seq_t; |
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static inline __s32 ceph_seq_cmp(__u32 a, __u32 b) |
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{ |
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return (__s32)a - (__s32)b; |
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} |
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/* |
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* entity_name -- logical name for a process participating in the |
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* network, e.g. 'mds0' or 'osd3'. |
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*/ |
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struct ceph_entity_name { |
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__u8 type; /* CEPH_ENTITY_TYPE_* */ |
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__le64 num; |
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} __attribute__ ((packed)); |
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#define CEPH_ENTITY_TYPE_MON 0x01 |
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#define CEPH_ENTITY_TYPE_MDS 0x02 |
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#define CEPH_ENTITY_TYPE_OSD 0x04 |
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#define CEPH_ENTITY_TYPE_CLIENT 0x08 |
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#define CEPH_ENTITY_TYPE_AUTH 0x20 |
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#define CEPH_ENTITY_TYPE_ANY 0xFF |
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extern const char *ceph_entity_type_name(int type); |
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/* |
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* entity_addr -- network address |
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*/ |
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struct ceph_entity_addr { |
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__le32 type; /* CEPH_ENTITY_ADDR_TYPE_* */ |
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__le32 nonce; /* unique id for process (e.g. pid) */ |
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struct sockaddr_storage in_addr; |
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} __attribute__ ((packed)); |
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static inline bool ceph_addr_equal_no_type(const struct ceph_entity_addr *lhs, |
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const struct ceph_entity_addr *rhs) |
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{ |
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return !memcmp(&lhs->in_addr, &rhs->in_addr, sizeof(lhs->in_addr)) && |
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lhs->nonce == rhs->nonce; |
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} |
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struct ceph_entity_inst { |
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struct ceph_entity_name name; |
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struct ceph_entity_addr addr; |
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} __attribute__ ((packed)); |
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/* used by message exchange protocol */ |
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#define CEPH_MSGR_TAG_READY 1 /* server->client: ready for messages */ |
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#define CEPH_MSGR_TAG_RESETSESSION 2 /* server->client: reset, try again */ |
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#define CEPH_MSGR_TAG_WAIT 3 /* server->client: wait for racing |
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incoming connection */ |
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#define CEPH_MSGR_TAG_RETRY_SESSION 4 /* server->client + cseq: try again |
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with higher cseq */ |
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#define CEPH_MSGR_TAG_RETRY_GLOBAL 5 /* server->client + gseq: try again |
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with higher gseq */ |
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#define CEPH_MSGR_TAG_CLOSE 6 /* closing pipe */ |
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#define CEPH_MSGR_TAG_MSG 7 /* message */ |
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#define CEPH_MSGR_TAG_ACK 8 /* message ack */ |
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#define CEPH_MSGR_TAG_KEEPALIVE 9 /* just a keepalive byte! */ |
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#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */ |
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#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */ |
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#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */ |
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#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */ |
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#define CEPH_MSGR_TAG_KEEPALIVE2 14 /* keepalive2 byte + ceph_timespec */ |
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#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */ |
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#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16 /* cephx v2 doing server challenge */ |
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/* |
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* connection negotiation |
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*/ |
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struct ceph_msg_connect { |
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__le64 features; /* supported feature bits */ |
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__le32 host_type; /* CEPH_ENTITY_TYPE_* */ |
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__le32 global_seq; /* count connections initiated by this host */ |
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__le32 connect_seq; /* count connections initiated in this session */ |
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__le32 protocol_version; |
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__le32 authorizer_protocol; |
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__le32 authorizer_len; |
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__u8 flags; /* CEPH_MSG_CONNECT_* */ |
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} __attribute__ ((packed)); |
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struct ceph_msg_connect_reply { |
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__u8 tag; |
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__le64 features; /* feature bits for this session */ |
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__le32 global_seq; |
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__le32 connect_seq; |
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__le32 protocol_version; |
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__le32 authorizer_len; |
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__u8 flags; |
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} __attribute__ ((packed)); |
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#define CEPH_MSG_CONNECT_LOSSY 1 /* messages i send may be safely dropped */ |
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/* |
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* message header |
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*/ |
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struct ceph_msg_header_old { |
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__le64 seq; /* message seq# for this session */ |
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__le64 tid; /* transaction id */ |
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__le16 type; /* message type */ |
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__le16 priority; /* priority. higher value == higher priority */ |
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__le16 version; /* version of message encoding */ |
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__le32 front_len; /* bytes in main payload */ |
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__le32 middle_len;/* bytes in middle payload */ |
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__le32 data_len; /* bytes of data payload */ |
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__le16 data_off; /* sender: include full offset; |
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receiver: mask against ~PAGE_MASK */ |
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struct ceph_entity_inst src, orig_src; |
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__le32 reserved; |
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__le32 crc; /* header crc32c */ |
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} __attribute__ ((packed)); |
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struct ceph_msg_header { |
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__le64 seq; /* message seq# for this session */ |
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__le64 tid; /* transaction id */ |
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__le16 type; /* message type */ |
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__le16 priority; /* priority. higher value == higher priority */ |
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__le16 version; /* version of message encoding */ |
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__le32 front_len; /* bytes in main payload */ |
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__le32 middle_len;/* bytes in middle payload */ |
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__le32 data_len; /* bytes of data payload */ |
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__le16 data_off; /* sender: include full offset; |
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receiver: mask against ~PAGE_MASK */ |
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struct ceph_entity_name src; |
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__le16 compat_version; |
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__le16 reserved; |
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__le32 crc; /* header crc32c */ |
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} __attribute__ ((packed)); |
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struct ceph_msg_header2 { |
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__le64 seq; /* message seq# for this session */ |
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__le64 tid; /* transaction id */ |
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__le16 type; /* message type */ |
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__le16 priority; /* priority. higher value == higher priority */ |
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__le16 version; /* version of message encoding */ |
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__le32 data_pre_padding_len; |
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__le16 data_off; /* sender: include full offset; |
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receiver: mask against ~PAGE_MASK */ |
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__le64 ack_seq; |
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__u8 flags; |
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/* oldest code we think can decode this. unknown if zero. */ |
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__le16 compat_version; |
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__le16 reserved; |
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} __attribute__ ((packed)); |
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#define CEPH_MSG_PRIO_LOW 64 |
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#define CEPH_MSG_PRIO_DEFAULT 127 |
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#define CEPH_MSG_PRIO_HIGH 196 |
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#define CEPH_MSG_PRIO_HIGHEST 255 |
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/* |
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* follows data payload |
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*/ |
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struct ceph_msg_footer_old { |
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__le32 front_crc, middle_crc, data_crc; |
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__u8 flags; |
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} __attribute__ ((packed)); |
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struct ceph_msg_footer { |
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__le32 front_crc, middle_crc, data_crc; |
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// sig holds the 64 bits of the digital signature for the message PLR |
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__le64 sig; |
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__u8 flags; |
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} __attribute__ ((packed)); |
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#define CEPH_MSG_FOOTER_COMPLETE (1<<0) /* msg wasn't aborted */ |
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#define CEPH_MSG_FOOTER_NOCRC (1<<1) /* no data crc */ |
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#define CEPH_MSG_FOOTER_SIGNED (1<<2) /* msg was signed */ |
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#endif
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