changelog: add bdev changes and NVMe multi-process (0f6c389e) · Commits · Public Repositories / spdk

CHANGELOG.md

+18 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,9 @@ removed devices (reported via a new `remove_cb` callback). Hotplug is currently
		only supported on Linux with the `uio_pci_generic` driver, and newly-added NVMe
		devices must be bound to `uio_pci_generic` by an external script or tool.

		Multiple processes may now coordinate and use a single NVMe device simultaneously
		using [DPDK Multi-process Support](http://dpdk.org/doc/guides/prog_guide/multi_proc_support.html).

		### NVMe over Fabrics target (`nvmf_tgt`)

		The `nvmf_tgt` configuration file format has been updated significantly to enable
		@@ -45,6 +48,21 @@ user to export devices from the SPDK block device abstraction layer as NVMe over
		Fabrics subsystems. Direct mode (raw NVMe device access) is also still supported,
		and a single `nvmf_tgt` may export both types of subsystems simultaneously.

		### Block device abstraction layer (bdev)

		The bdev layer now supports scatter/gather read and write I/O APIs, and the NVMe
		blockdev driver has been updated to support scatter/gather. Apps can use the
		new scatter/gather support via the `spdk_bdev_readv()` and `spdk_bdev_writev()`
		functions.

		The bdev status returned from each I/O has been extended to pass through NVMe
		or SCSI status codes directly in cases where the underlying device can provide
		a more specific status code.

		A Ceph RBD (RADOS Block Device) blockdev driver has been added. This allows the
		`iscsi_tgt` and `nvmf_tgt` apps to export Ceph RBD volumes as iSCSI LUNs or
		NVMe namespaces.

		### General changes

		`libpciaccess` has been removed as a dependency and DPDK PCI enumeration is