This patch set adds a generic NVMe over Fabrics target. The implementation conforms to the NVMe 1.2b specification (which includes Fabrics) and provides the NVMe over Fabrics access to Linux block devices. The target implementation consists of several elements: - NVMe target core: defines and manages the NVMe entities (subsystems, controllers, namespaces, ...) and their allocation, responsible for initial commands processing and correct orchestration of the stack setup and tear down. - NVMe admin command implementation: responsible for parsing and servicing admin commands such as controller identify, set features, keep-alive, log page, ...). - NVMe I/O command implementation: responsible for performing the actual I/O (Read, Write, Flush, Deallocate (aka Discard). It is a very thin layer on top of the block layer and implements no logic of it's own. To support exporting file systems please use the loopback block driver in direct I/O mode, which gives very good performance. - NVMe over Fabrics support: responsible for servicing Fabrics commands (connect, property get/set). - NVMe over Fabrics discovery service: responsible to serve the Discovery log page through a special cut down Discovery controller. The target is configured using configfs, and configurable entities are: - NVMe subsystems and namespaces - NVMe over Fabrics ports and referrals - Host ACLs for primitive access control - NVMe over Fabrics access control is still work in progress at the specification level and will be implemented once that work has finished. To configure the target use the nvmetcli tool from http://git.infradead.org/users/hch/nvmetcli.git, which includes detailed setup documentation. In addition to the Fabrics target implementation we provide a loopback driver which also conforms the NVMe over Fabrics specification and allows evaluation of the target stack with local access without requiring a real fabric. Various test cases are provided for this implementation: nvmetcli contains a python testsuite that mostly stresses the configfs interface of the target, and we have various integration tests prepared for the kernel host and target which are available at: git://git.infradead.org/nvme-fabrics.git nvmf-submit.2 Gitweb: http://git.infradead.org/nvme-fabrics.git/shortlog/refs/heads/nvmf-submit.2 This series depends on the "generic NVMe over Fabrics library support V2" series submitted last week. Changes since V1: - rebased to the req_op changes in the block tree (me) - fix a 64-bit division (me) - properly set the SGL flag for AER requests in nvme-loop (me) - fix use of ERR_PTR (buildbot) -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
