1a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#ifndef __DRBD_PROTOCOL_H 2a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define __DRBD_PROTOCOL_H 3a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 4a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherenum drbd_packet { 5a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* receiver (data socket) */ 6a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_DATA = 0x00, 7a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_DATA_REPLY = 0x01, /* Response to P_DATA_REQUEST */ 8a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RS_DATA_REPLY = 0x02, /* Response to P_RS_DATA_REQUEST */ 9a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_BARRIER = 0x03, 10a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_BITMAP = 0x04, 11a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_BECOME_SYNC_TARGET = 0x05, 12a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_BECOME_SYNC_SOURCE = 0x06, 13a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_UNPLUG_REMOTE = 0x07, /* Used at various times to hint the peer */ 14a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_DATA_REQUEST = 0x08, /* Used to ask for a data block */ 15a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RS_DATA_REQUEST = 0x09, /* Used to ask for a data block for resync */ 16a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_SYNC_PARAM = 0x0a, 17a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_PROTOCOL = 0x0b, 18a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_UUIDS = 0x0c, 19a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_SIZES = 0x0d, 20a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_STATE = 0x0e, 21a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_SYNC_UUID = 0x0f, 22a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_AUTH_CHALLENGE = 0x10, 23a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_AUTH_RESPONSE = 0x11, 24a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_STATE_CHG_REQ = 0x12, 25a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 26a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* asender (meta socket */ 27a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_PING = 0x13, 28a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_PING_ACK = 0x14, 29a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RECV_ACK = 0x15, /* Used in protocol B */ 30a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_WRITE_ACK = 0x16, /* Used in protocol C */ 31a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RS_WRITE_ACK = 0x17, /* Is a P_WRITE_ACK, additionally call set_in_sync(). */ 32a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_SUPERSEDED = 0x18, /* Used in proto C, two-primaries conflict detection */ 33a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_NEG_ACK = 0x19, /* Sent if local disk is unusable */ 34a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_NEG_DREPLY = 0x1a, /* Local disk is broken... */ 35a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_NEG_RS_DREPLY = 0x1b, /* Local disk is broken... */ 36a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_BARRIER_ACK = 0x1c, 37a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_STATE_CHG_REPLY = 0x1d, 38a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 39a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* "new" commands, no longer fitting into the ordering scheme above */ 40a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 41a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_OV_REQUEST = 0x1e, /* data socket */ 42a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_OV_REPLY = 0x1f, 43a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_OV_RESULT = 0x20, /* meta socket */ 44a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_CSUM_RS_REQUEST = 0x21, /* data socket */ 45a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RS_IS_IN_SYNC = 0x22, /* meta socket */ 46a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_SYNC_PARAM89 = 0x23, /* data socket, protocol version 89 replacement for P_SYNC_PARAM */ 47a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_COMPRESSED_BITMAP = 0x24, /* compressed or otherwise encoded bitmap transfer */ 48a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* P_CKPT_FENCE_REQ = 0x25, * currently reserved for protocol D */ 49a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* P_CKPT_DISABLE_REQ = 0x26, * currently reserved for protocol D */ 50a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_DELAY_PROBE = 0x27, /* is used on BOTH sockets */ 51a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_OUT_OF_SYNC = 0x28, /* Mark as out of sync (Outrunning), data socket */ 52a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RS_CANCEL = 0x29, /* meta: Used to cancel RS_DATA_REQUEST packet by SyncSource */ 53a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_CONN_ST_CHG_REQ = 0x2a, /* data sock: Connection wide state request */ 54a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_CONN_ST_CHG_REPLY = 0x2b, /* meta sock: Connection side state req reply */ 55a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_RETRY_WRITE = 0x2c, /* Protocol C: retry conflicting write request */ 56a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_PROTOCOL_UPDATE = 0x2d, /* data sock: is used in established connections */ 57a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg /* 0x2e to 0x30 reserved, used in drbd 9 */ 58a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg 59a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg /* REQ_DISCARD. We used "discard" in different contexts before, 60a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg * which is why I chose TRIM here, to disambiguate. */ 61a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg P_TRIM = 0x31, 62a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 63a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */ 64a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_MAX_OPT_CMD = 0x101, 65a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 66a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* special command ids for handshake */ 67a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 68a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_INITIAL_META = 0xfff1, /* First Packet on the MetaSock */ 69a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_INITIAL_DATA = 0xfff2, /* First Packet on the Socket */ 70a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 71a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher P_CONNECTION_FEATURES = 0xfffe /* FIXED for the next century! */ 72a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher}; 73a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 74a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#ifndef __packed 75a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define __packed __attribute__((packed)) 76a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#endif 77a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 78a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* This is the layout for a packet on the wire. 79a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * The byteorder is the network byte order. 80a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * (except block_id and barrier fields. 81a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * these are pointers to local structs 82a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * and have no relevance for the partner, 83a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * which just echoes them as received.) 84a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * 85a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * NOTE that the payload starts at a long aligned offset, 86a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * regardless of 32 or 64 bit arch! 87a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 88a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_header80 { 89a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 magic; 90a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 command; 91a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 length; /* bytes of data after this header */ 92a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 93a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 94a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* Header for big packets, Used for data packets exceeding 64kB */ 95a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_header95 { 96a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 magic; /* use DRBD_MAGIC_BIG here */ 97a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 command; 98a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 length; 99a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 100a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 101a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_header100 { 102a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 magic; 103a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 volume; 104a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 command; 105a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 length; 106a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 pad; 107a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 108a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 109a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* these defines must not be changed without changing the protocol version */ 110a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_HARDBARRIER 1 /* depricated */ 111a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_RW_SYNC 2 /* equals REQ_SYNC */ 112a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_MAY_SET_IN_SYNC 4 113a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_UNPLUG 8 /* not used anymore */ 114a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_FUA 16 /* equals REQ_FUA */ 115a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_FLUSH 32 /* equals REQ_FLUSH */ 116a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_DISCARD 64 /* equals REQ_DISCARD */ 117a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_SEND_RECEIVE_ACK 128 /* This is a proto B write request */ 118a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DP_SEND_WRITE_ACK 256 /* This is a proto C write request */ 119a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 120a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_data { 121a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 sector; /* 64 bits sector number */ 122a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 block_id; /* to identify the request in protocol B&C */ 123a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 seq_num; 124a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 dp_flags; 125a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 126a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 127a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenbergstruct p_trim { 128a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg struct p_data p_data; 129a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg u32 size; /* == bio->bi_size */ 130a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg} __packed; 131a0fb3c47a1aae5d38a88ea858f14d6d088d05e07Lars Ellenberg 132a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* 133a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * commands which share a struct: 134a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * p_block_ack: 135a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_RECV_ACK (proto B), P_WRITE_ACK (proto C), 136a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_SUPERSEDED (proto C, two-primaries conflict detection) 137a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * p_block_req: 138a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_DATA_REQUEST, P_RS_DATA_REQUEST 139a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 140a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_block_ack { 141a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 sector; 142a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 block_id; 143a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 blksize; 144a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 seq_num; 145a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 146a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 147a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_block_req { 148a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 sector; 149a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 block_id; 150a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 blksize; 151a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 pad; /* to multiple of 8 Byte */ 152a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 153a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 154a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* 155a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * commands with their own struct for additional fields: 156a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_CONNECTION_FEATURES 157a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_BARRIER 158a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_BARRIER_ACK 159a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * P_SYNC_PARAM 160a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * ReportParams 161a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 162a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 16320c68fdea1646ed746abf19122d7699493927005Lars Ellenberg#define FF_TRIM 1 16420c68fdea1646ed746abf19122d7699493927005Lars Ellenberg 165a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_connection_features { 166a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 protocol_min; 167a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 feature_flags; 168a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 protocol_max; 169a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 170a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* should be more than enough for future enhancements 171a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * for now, feature_flags and the reserved array shall be zero. 172a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 173a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 174a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 _pad; 175a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 reserved[7]; 176a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 177a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 178a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_barrier { 179a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 barrier; /* barrier number _handle_ only */ 180a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 pad; /* to multiple of 8 Byte */ 181a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 182a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 183a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_barrier_ack { 184a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 barrier; 185a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 set_size; 186a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 187a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 188a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_rs_param { 189a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 resync_rate; 190a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 191a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* Since protocol version 88 and higher. */ 192a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char verify_alg[0]; 193a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 194a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 195a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_rs_param_89 { 196a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 resync_rate; 197a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* protocol version 89: */ 198a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char verify_alg[SHARED_SECRET_MAX]; 199a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char csums_alg[SHARED_SECRET_MAX]; 200a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 201a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 202a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_rs_param_95 { 203a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 resync_rate; 204a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char verify_alg[SHARED_SECRET_MAX]; 205a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char csums_alg[SHARED_SECRET_MAX]; 206a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 c_plan_ahead; 207a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 c_delay_target; 208a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 c_fill_target; 209a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 c_max_rate; 210a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 211a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 212a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherenum drbd_conn_flags { 213a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher CF_DISCARD_MY_DATA = 1, 214a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher CF_DRY_RUN = 2, 215a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher}; 216a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 217a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_protocol { 218a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 protocol; 219a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 after_sb_0p; 220a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 after_sb_1p; 221a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 after_sb_2p; 222a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 conn_flags; 223a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 two_primaries; 224a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 225a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* Since protocol version 87 and higher. */ 226a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher char integrity_alg[0]; 227a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 228a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 229a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 230a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_uuids { 231a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 uuid[UI_EXTENDED_SIZE]; 232a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 233a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 234a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_rs_uuid { 235a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 uuid; 236a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 237a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 238a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_sizes { 239a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 d_size; /* size of disk */ 240a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 u_size; /* user requested size */ 241a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 c_size; /* current exported size */ 242a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 max_bio_size; /* Maximal size of a BIO */ 243a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 queue_order_type; /* not yet implemented in DRBD*/ 244a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u16 dds_flags; /* use enum dds_flags here. */ 245a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 246a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 247a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_state { 248a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 state; 249a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 250a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 251a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_req_state { 252a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 mask; 253a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 val; 254a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 255a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 256a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_req_state_reply { 257a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 retcode; 258a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 259a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 260a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_drbd06_param { 261a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 size; 262a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 state; 263a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 blksize; 264a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 protocol; 265a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 version; 266a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 gen_cnt[5]; 267a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 bit_map_gen[5]; 268a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 269a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 270a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_block_desc { 271a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u64 sector; 272a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 blksize; 273a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 pad; /* to multiple of 8 Byte */ 274a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 275a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 276a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* Valid values for the encoding field. 277a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * Bump proto version when changing this. */ 278a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherenum drbd_bitmap_code { 279a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* RLE_VLI_Bytes = 0, 280a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * and other bit variants had been defined during 281a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * algorithm evaluation. */ 282a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher RLE_VLI_Bits = 2, 283a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher}; 284a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 285a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_compressed_bm { 286a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher /* (encoding & 0x0f): actual encoding, see enum drbd_bitmap_code 287a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * (encoding & 0x80): polarity (set/unset) of first runlength 288a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * ((encoding >> 4) & 0x07): pad_bits, number of trailing zero bits 289a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * used to pad up to head.length bytes 290a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 291a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u8 encoding; 292a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 293a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u8 code[0]; 294a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 295a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 296a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacherstruct p_delay_probe93 { 297a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 seq_num; /* sequence number to match the two probe packets */ 298a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher u32 offset; /* usecs the probe got sent after the reference time point */ 299a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher} __packed; 300a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 301a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher/* 302a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * Bitmap packets need to fit within a single page on the sender and receiver, 303a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher * so we are limited to 4 KiB (and not to PAGE_SIZE, which can be bigger). 304a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher */ 305a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#define DRBD_SOCKET_BUFFER_SIZE 4096 306a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher 307a3603a6e3b4f2f0fb5529821134424e2eeec88fdAndreas Gruenbacher#endif /* __DRBD_PROTOCOL_H */ 308