[rds-devel] Re: Transmit RDS protocol version in first packet

Or Gerlitz ogerlitz at voltaire.com
Mon Jan 28 05:07:00 PST 2008


Richard Frank wrote:
> How much private data is available its max size ?

for rdma_connect() its 56 bytes (=92-36), note that the private data 
length does not go over the wire so the private data len values you get 
on the rdma-cm event are always the maximum values (52 for connection 
request event)

Or

> union cma_ip_addr {
> 	struct in6_addr ip6;
> 	struct {
> 		__u32 pad[3];
> 		__u32 addr;
> 	} ip4;
> };
> 
> struct cma_hdr {
> 	u8 cma_version;
> 	u8 ip_version;	/* IP version: 7:4 */
> 	__u16 port;
> 	union cma_ip_addr src_addr;
> 	union cma_ip_addr dst_addr;
> };
> 
> IB_CM_REQ_PRIVATE_DATA_SIZE	 = 92,







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