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changelog: add bdev changes and NVMe multi-process

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Change-Id: Ib68feab08123d6b631a506cd9024c39eb36c5832
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2016-12-12 17:26:58 -07:00
parent 94cf5c00d2
commit 0f6c389e69
1 changed files with 18 additions and 0 deletions
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CHANGELOG.md
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@ -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