sheepdog

const (
	SD_DEFAULT_PORT                = 7000
	SD_PROTO_VER_TRIM_ZERO_SECTORS = 0x02
)

const (
	// client2sheep
	SD_OP_CREATE_AND_WRITE_OBJ sdOpcode = 0x01
	SD_OP_READ_OBJ             sdOpcode = 0x02
	SD_OP_WRITE_OBJ            sdOpcode = 0x03
	SD_OP_REMOVE_OBJ           sdOpcode = 0x04
	SD_OP_DISCARD_OBJ          sdOpcode = 0x05

	SD_OP_NEW_VDI             sdOpcode = 0x11
	SD_OP_LOCK_VDI            sdOpcode = 0x12
	SD_OP_RELEASE_VDI         sdOpcode = 0x13
	SD_OP_GET_VDI_INFO        sdOpcode = 0x14
	SD_OP_READ_VDIS           sdOpcode = 0x15
	SD_OP_FLUSH_VDI           sdOpcode = 0x16
	SD_OP_DEL_VDI             sdOpcode = 0x17
	SD_OP_GET_CLUSTER_DEFAULT sdOpcode = 0x18

	// sheep2sheep
	SD_OP_GET_NODE_LIST            sdOpcode = 0x82
	SD_OP_MAKE_FS                  sdOpcode = 0x84
	SD_OP_SHUTDOWN                 sdOpcode = 0x85
	SD_OP_STAT_SHEEP               sdOpcode = 0x86
	SD_OP_STAT_CLUSTER             sdOpcode = 0x87
	SD_OP_GET_VDI_ATTR             sdOpcode = 0x89
	SD_OP_FORCE_RECOVER            sdOpcode = 0x8a
	SD_OP_GET_STORE_LIST           sdOpcode = 0x90
	SD_OP_SNAPSHOT                 sdOpcode = 0x91
	SD_OP_RESTORE                  sdOpcode = 0x92
	SD_OP_GET_SNAP_FILE            sdOpcode = 0x93
	SD_OP_CLEANUP                  sdOpcode = 0x94
	SD_OP_TRACE_STATUS             sdOpcode = 0x95
	SD_OP_TRACE_READ_BUF           sdOpcode = 0x96
	SD_OP_STAT_RECOVERY            sdOpcode = 0x97
	SD_OP_FLUSH_DEL_CACHE          sdOpcode = 0x98
	SD_OP_NOTIFY_VDI_DEL           sdOpcode = 0x99
	SD_OP_KILL_NODE                sdOpcode = 0x9A
	SD_OP_TRACE_ENABLE             sdOpcode = 0x9B
	SD_OP_TRACE_DISABLE            sdOpcode = 0x9C
	SD_OP_GET_OBJ_LIST             sdOpcode = 0xA1
	SD_OP_GET_EPOCH                sdOpcode = 0xA2
	SD_OP_CREATE_AND_WRITE_PEER    sdOpcode = 0xA3
	SD_OP_READ_PEER                sdOpcode = 0xA4
	SD_OP_WRITE_PEER               sdOpcode = 0xA5
	SD_OP_REMOVE_PEER              sdOpcode = 0xA6
	SD_OP_ENABLE_RECOVER           sdOpcode = 0xA8
	SD_OP_DISABLE_RECOVER          sdOpcode = 0xA9
	SD_OP_GET_VDI_COPIES           sdOpcode = 0xAB
	SD_OP_COMPLETE_RECOVERY        sdOpcode = 0xAC
	SD_OP_FLUSH_NODES              sdOpcode = 0xAD
	SD_OP_FLUSH_PEER               sdOpcode = 0xAE
	SD_OP_NOTIFY_VDI_ADD           sdOpcode = 0xAF
	SD_OP_MD_INFO                  sdOpcode = 0xB1
	SD_OP_MD_PLUG                  sdOpcode = 0xB2
	SD_OP_MD_UNPLUG                sdOpcode = 0xB3
	SD_OP_GET_HASH                 sdOpcode = 0xB4
	SD_OP_REWEIGHT                 sdOpcode = 0xB5
	SD_OP_STAT                     sdOpcode = 0xB8
	SD_OP_GET_LOGLEVEL             sdOpcode = 0xB9
	SD_OP_SET_LOGLEVEL             sdOpcode = 0xBA
	SD_OP_NFS_CREATE               sdOpcode = 0xBB
	SD_OP_NFS_DELETE               sdOpcode = 0xBC
	SD_OP_EXIST                    sdOpcode = 0xBD
	SD_OP_CLUSTER_INFO             sdOpcode = 0xBE
	SD_OP_ALTER_CLUSTER_COPY       sdOpcode = 0xBF
	SD_OP_ALTER_VDI_COPY           sdOpcode = 0xC0
	SD_OP_DECREF_OBJ               sdOpcode = 0xC1
	SD_OP_DECREF_PEER              sdOpcode = 0xC2
	SD_OP_REPAIR_REPLICA           sdOpcode = 0xC5
	SD_OP_OIDS_EXIST               sdOpcode = 0xC6
	SD_OP_VDI_STATE_CHECKPOINT_CTL sdOpcode = 0xC7
	SD_OP_INODE_COHERENCE          sdOpcode = 0xC8
	SD_OP_READ_DEL_VDIS            sdOpcode = 0xC9
	SD_OP_GET_RECOVERY             sdOpcode = 0xCA
	SD_OP_SET_RECOVERY             sdOpcode = 0xCB
	SD_OP_SET_VNODES               sdOpcode = 0xCC
	SD_OP_GET_VNODES               sdOpcode = 0xCD
)

const (
	SD_HDR_SIZE = 16
	SD_REQ_SIZE = 48
	SD_RSP_SIZE = 48

	SECTOR_SIZE = 512 // 1 << 9 // get via ioctl BLKBSZGET
)

const (
	SD_MAX_VDI_LEN              = 256
	SD_MAX_VDI_TAG_LEN          = 256
	SD_MAX_VDI_ATTR_KEY_LEN     = 256
	SD_MAX_VDI_ATTR_VALUE_LEN   = 65536
	SD_MAX_SNAPSHOT_TAG_LEN     = 256
	SD_DEFAULT_BLOCK_SIZE_SHIFT = 22
	SD_NR_VDIS                  = uint64(1) << 24
)

const (
	SD_FLAG_CMD_WRITE     = 0x01
	SD_FLAG_CMD_COW       = 0x02
	SD_FLAG_CMD_CACHE     = 0x04 /* Writeback mode for cache */
	SD_FLAG_CMD_DIRECT    = 0x08 /* Don't use cache */
	SD_FLAG_CMD_PIGGYBACK = 0x10
	SD_FLAG_CMD_FWD       = 0x40
)

const (
	SD_RES_SUCCESS         = uint32(0x00) /* Success */
	SD_RES_UNKNOWN         = uint32(0x01) /* Unknown error */
	SD_RES_NO_OBJ          = uint32(0x02) /* No object found */
	SD_RES_EIO             = uint32(0x03) /* I/O error */
	SD_RES_VDI_EXIST       = uint32(0x04) /* Vdi exists already */
	SD_RES_INVALID_PARMS   = uint32(0x05) /* Invalid parameters */
	SD_RES_SYSTEM_ERROR    = uint32(0x06) /* System error */
	SD_RES_VDI_LOCKED      = uint32(0x07) /* Vdi is locked */
	SD_RES_NO_VDI          = uint32(0x08) /* No vdi found */
	SD_RES_NO_BASE_VDI     = uint32(0x09) /* No base vdi found */
	SD_RES_VDI_READ        = uint32(0x0A) /* Cannot read requested vdi */
	SD_RES_VDI_WRITE       = uint32(0x0B) /* Cannot write requested vdi */
	SD_RES_BASE_VDI_READ   = uint32(0x0C) /* Cannot read base vdi */
	SD_RES_BASE_VDI_WRITE  = uint32(0x0D) /* Cannot write base vdi */
	SD_RES_NO_TAG          = uint32(0x0E) /* Requested tag is not found */
	SD_RES_STARTUP         = uint32(0x0F) /* Sheepdog is on starting up */
	SD_RES_VDI_NOT_LOCKED  = uint32(0x10) /* Vdi is not locked */
	SD_RES_SHUTDOWN        = uint32(0x11) /* Sheepdog is shutting down */
	SD_RES_NO_MEM          = uint32(0x12) /* Cannot allocate memory */
	SD_RES_FULL_VDI        = uint32(0x13) /* we already have the maximum vdis */
	SD_RES_VER_MISMATCH    = uint32(0x14) /* Protocol version mismatch */
	SD_RES_NO_SPACE        = uint32(0x15) /* Server has no room for new objects */
	SD_RES_WAIT_FOR_FORMAT = uint32(0x16) /* Waiting for a format operation */
	SD_RES_WAIT_FOR_JOIN   = uint32(0x17) /* Waiting for other nodes joining */
	SD_RES_JOIN_FAILED     = uint32(0x18) /* Target node had failed to join sheepdog */
	SD_RES_HALT            = uint32(0x19) /* Sheepdog is stopped serving IO request */
	SD_RES_READONLY        = uint32(0x1A) /* Object is read-only */

	SD_RES_INODE_INVALIDATED = uint32(0x1D)
)

const (
	SD_EC_MAX_STRIP = 16
	SD_MAX_COPIES   = (SD_EC_MAX_STRIP*2 - 1)

	CURRENT_VDI_ID = 0

	LOCK_TYPE_NORMAL = 0
	LOCK_TYPE_SHARED = 1 /* for iSCSI multipath */

	VDI_BIT       = uint64(1) << 63
	VMSTATE_BIT   = uint64(1) << 62
	VDI_ATTR_BIT  = uint64(1) << 61
	VDI_BTREE_BIT = uint64(1) << 60
	LEDGER_BIT    = uint64(1) << 59

	VDI_SPACE_SHIFT = 32
	SD_VDI_MASK     = 0x00FFFFFF00000000

	MAX_DATA_OBJS = uint64(1) << 32

	SD_INODE_SIZE            = 10
	SD_INODE_INDEX_SIZE      = 4 * MAX_DATA_OBJS
	SD_INODE_DATA_INDEX      = uint64(1) << 20
	SD_INODE_DATA_INDEX_SIZE = 4 * SD_INODE_DATA_INDEX
	//	SD_INODE_HEADER_SIZE
	SD_INODE_HEADER_SIZE = 4664
	SD_LEDGER_OBJ_SIZE   = uint64(1) << 22
	OLD_MAX_CHILDREN     = uint64(1024)
)