IB/srp: add SRP_CRED_REQ support

This series of four patches adds SRP_CRED_REQ support in ib_srp, which is a feature defined by the SRP (draft) standard. These patches depend on the "IB/srp receive buffer handling robustness improvement" patch posted a few days ago.

Changes in v3 compared to v2:
- Corrected completion queue size from SRP_REQ_SQ_SIZE (63) into SRP_SQ_SIZE (64).
- Merged the two functions __srp_get_tx_req_iu() and __srp_get_tx_rsp_iu() into a single function __srp_get_tx_iu().
- Removed __attribute__((packed)) from the structure definitions added in include/scsi/srp.h because it was superfluous.
- Modified descriptions of patches 1/4, 2/4 and 3/4.

Changes in v2 compared to v1:
- Split the big patch into multiple patches, which makes reviewing easier.
- Instead of defining separate queues for transmitting requests and responses, a single queue is now used.
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html