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| author | Michal Kubecek <mkubecek@suse.cz> | 2020-03-12 23:08:28 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-13 01:32:33 +0300 |
| commit | 2fc2929e807211a9535a6541f24b57fa1c469728 (patch) | |
| tree | d0b54b418d516850bfd30e48a756d5f43890f642 /Documentation/networking | |
| parent | e4a1717b677c5cb285e9b425c569e261084a484c (diff) | |
| download | linux-2fc2929e807211a9535a6541f24b57fa1c469728.tar.xz | |
ethtool: set device ring sizes with RINGS_SET request
Implement RINGS_SET netlink request to set ring sizes of a network device.
These are traditionally set with ETHTOOL_SRINGPARAM ioctl request.
Like the ioctl implementation, the generic ethtool code checks if supplied
values do not exceed driver defined limits; if they do, first offending
attribute is reported using extack.
v2:
- fix netdev reference leak in error path (found by Jakub Kicinsky)
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/ethtool-netlink.rst | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 798c2f97d89b..ba31ae8f1feb 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -194,6 +194,7 @@ Userspace to kernel: ``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags ``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags ``ETHTOOL_MSG_RINGS_GET`` get ring sizes + ``ETHTOOL_MSG_RINGS_SET`` set ring sizes ===================================== ================================ Kernel to userspace: @@ -673,6 +674,26 @@ Kernel response contents: ==================================== ====== ========================== +RINGS_SET +========= + +Sets ring sizes like ``ETHTOOL_SRINGPARAM`` ioctl request. + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_RINGS_HEADER`` nested reply header + ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring + ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring + ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring + ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring + ==================================== ====== ========================== + +Kernel checks that requested ring sizes do not exceed limits reported by +driver. Driver may impose additional constraints and may not suspport all +attributes. + + Request translation =================== @@ -700,7 +721,7 @@ have their netlink replacement yet. ``ETHTOOL_GCOALESCE`` n/a ``ETHTOOL_SCOALESCE`` n/a ``ETHTOOL_GRINGPARAM`` ``ETHTOOL_MSG_RINGS_GET`` - ``ETHTOOL_SRINGPARAM`` n/a + ``ETHTOOL_SRINGPARAM`` ``ETHTOOL_MSG_RINGS_SET`` ``ETHTOOL_GPAUSEPARAM`` n/a ``ETHTOOL_SPAUSEPARAM`` n/a ``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET`` |