On 8/6/25 16:10, John Baldwin wrote:
The branch main has been updated by jhb:
URL:
https://cgit.FreeBSD.org/src/commit/?id=66b5296f1b29083634e2875ff08c32e7b6b866a8
commit 66b5296f1b29083634e2875ff08c32e7b6b866a8
Author: John Baldwin <j...@freebsd.org>
AuthorDate: 2025-08-06 19:57:50 +0000
Commit: John Baldwin <j...@freebsd.org>
CommitDate: 2025-08-06 19:59:13 +0000
ctld: Add support for NVMe over Fabrics
While the overall structure is similar for NVMeoF controllers and
iSCSI targets, there are sufficient differences that NVMe support uses
an alternate configuration syntax.
- In authentication groups, permitted NVMeoF hosts can be allowed by
names (NQNs) via "host-nqn" values (similar to "initiator-name" for
iSCSI). Similarly, "host-address" accepts permitted host addresses
similar to "initiator-portal" for iSCSI.
- A new "transport-group" context enumerates transports that can be
used by a group of NVMeoF controllers similar to the "portal-group"
context for iSCSI. In this section, the "listen" keyword accepts a
transport as well as an address to permit other types of transports
besides TCP in the future. The "foreign", "offload", and "redirect"
keywords are also not meaningful and thus not supported.
- A new "controller" context describes an NVMeoF I/O controller
similar to the "target" context for iSCSI. One key difference here
is that "lun" objects are replaced by "namespace" objects. However,
a "namespace" can reference a named global lun permitting LUNs to be
shared between iSCSI targets and NVMeoF controllers.
NB: Authentication via CHAP is not implemented for NVMeoF.
Reviewed by: imp
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D48773
The config file (UCL) I used for most of my testing looks something like
this (some settings omitted and names changed, etc.). It creates two LUNs
that are exported by both iSCSI and NVMeoF (so you can access the same
disk via either protocol).
portal-group {
pg0 {
discovery-auth-group = no-authentication
listen = [
0.0.0.0,
"[::]"
]
offload = cxgbei
}
}
lun {
zvol {
path /dev/zvol/bhyve/iscsi
size 4GB
},
ramdisk {
backend ramdisk
size 1G
option capacity 1G
}
}
target {
"iqn.2001-03.com.example:myhost0" {
auth-group = no-authentication
portal-group = pg0
lun {
0 = zvol,
1 = ramdisk
}
}
}
controller {
"nqn.2001-03.com.example:myhost0" {
auth-group = no-authentication
namespace {
1 = zvol,
2 = ramdisk
}
}
}
--
John Baldwin
