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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 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. 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`) ### NVMe over Fabrics target (`nvmf_tgt`)
The `nvmf_tgt` configuration file format has been updated significantly to enable 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, Fabrics subsystems. Direct mode (raw NVMe device access) is also still supported,
and a single `nvmf_tgt` may export both types of subsystems simultaneously. 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 ### General changes
`libpciaccess` has been removed as a dependency and DPDK PCI enumeration is `libpciaccess` has been removed as a dependency and DPDK PCI enumeration is