/* SPDX-License-Identifier: GPL-2.0 */#ifndef CEPH_MSGR_H#define CEPH_MSGR_H /* * Data types for message passing layer used by Ceph. */ #define CEPH_MON_PORT 6789 /* default 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"#define CEPH_BANNER_LEN 9#define CEPH_BANNER_MAX_LEN 30 /* * 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 "ceph v2\n"#define CEPH_BANNER_V2_LEN 8#define CEPH_BANNER_V2_PREFIX_LEN (CEPH_BANNER_V2_LEN + sizeof(__le16)) /* * messenger V2 features */#define CEPH_MSGR2_INCARNATION_1 (0ull) #define DEFINE_MSGR2_FEATURE(bit, incarnation, name) \ static const uint64_t __maybe_unused CEPH_MSGR2_FEATURE_##name = (1ULL << bit); \ static const uint64_t __maybe_unused 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 CEPH_MSGR2_SUPPORTED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1) #define CEPH_MSGR2_REQUIRED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1) /* * 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_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; /* CEPH_ENTITY_ADDR_TYPE_* */ __le32 nonce; /* unique id for process (e.g. pid) */ struct sockaddr_storage in_addr;} __attribute__ ((packed)); static inline bool ceph_addr_equal_no_type(const struct ceph_entity_addr *lhs, const struct ceph_entity_addr *rhs){ return !memcmp(&lhs->in_addr, &rhs->in_addr, sizeof(lhs->in_addr)) && lhs->nonce == rhs->nonce;} 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 /* keepalive2 byte + ceph_timespec */#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16 /* cephx 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; __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 */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 */ #endif
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef CEPH_MSGR_H
#define CEPH_MSGR_H
/*
* Data types for message passing layer used by Ceph.
*/
#define CEPH_MON_PORT 6789 /* default 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"
#define CEPH_BANNER_LEN 9
#define CEPH_BANNER_MAX_LEN 30
/*
* 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 "ceph v2\n"
#define CEPH_BANNER_V2_LEN 8
#define CEPH_BANNER_V2_PREFIX_LEN (CEPH_BANNER_V2_LEN + sizeof(__le16))
/*
* messenger V2 features
*/
#define CEPH_MSGR2_INCARNATION_1 (0ull)
#define DEFINE_MSGR2_FEATURE(bit, incarnation, name) \
static const uint64_t __maybe_unused CEPH_MSGR2_FEATURE_##name = (1ULL << bit); \
static const uint64_t __maybe_unused 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 CEPH_MSGR2_SUPPORTED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1)
#define CEPH_MSGR2_REQUIRED_FEATURES (CEPH_MSGR2_FEATURE_REVISION_1)
/*
* 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_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; /* CEPH_ENTITY_ADDR_TYPE_* */
__le32 nonce; /* unique id for process (e.g. pid) */
struct sockaddr_storage in_addr;
} __attribute__ ((packed));
static inline bool ceph_addr_equal_no_type(const struct ceph_entity_addr *lhs,
const struct ceph_entity_addr *rhs)
{
return !memcmp(&lhs->in_addr, &rhs->in_addr, sizeof(lhs->in_addr)) &&
lhs->nonce == rhs->nonce;
}
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 /* keepalive2 byte + ceph_timespec */
#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */
#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16 /* cephx 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;
__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
*/
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 */
#endif