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kni: flag deprecated status at build time

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To ensure all users are aware of KNI's deprecated status at build time,
this library is marked as a deprecated library: the library is disabled
by default. It can be re-enabled by setting disabled_libs to the empty
string (or other string not including 'kni').

The dependent NIC driver, drivers/net/kni, is disabled accordingly as it
depends on the library.

NOTE: This is part of the deprecation process for KNI agreed by the DPDK
technical board.[1]

[1] https://mails.dpdk.org/archives/dev/2022-June/243596.html

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
This commit is contained in:
Bruce Richardson 2022-10-10 11:44:46 +01:00 committed by David Marchand
parent dfd5b25b57
commit bbaf917565
3 changed files with 7 additions and 1 deletions
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4
doc/guides/prog_guide/kernel_nic_interface.rst
View File

@ -14,6 +14,10 @@ Kernel NIC Interface
For an alternative to KNI, that does not require any out-of-tree Linux kernel modules,
or a custom library, see :ref:`virtio_user_as_exception_path`.
.. note::
KNI is disabled by default in the DPDK build.
To re-enable the library, remove 'kni' from the "disable_libs" meson option when configuring a build.
The DPDK Kernel NIC Interface (KNI) allows userspace applications access to the Linux* control plane.

2
lib/meson.build
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@ -85,6 +85,8 @@ optional_libs = [
'vhost',
]
dpdk_libs_deprecated += ['kni']
disabled_libs = []
opt_disabled_libs = run_command(list_dir_globs, get_option('disable_libs'),
check: true).stdout().split()

2
meson_options.txt
View File

@ -8,7 +8,7 @@ option('developer_mode', type: 'feature', description:
'turn on additional build checks relevant for DPDK developers')
option('disable_drivers', type: 'string', value: '', description:
'Comma-separated list of drivers to explicitly disable.')
option('disable_libs', type: 'string', value: '', description:
option('disable_libs', type: 'string', value: 'kni', description:
'Comma-separated list of libraries to explicitly disable. [NOTE: not all libs can be disabled]')
option('drivers_install_subdir', type: 'string', value: 'dpdk/pmds-<VERSION>', description:
'Subdirectory of libdir where to install PMDs. Defaults to using a versioned subdirectory.')