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ethtool: set device ring sizes with RINGS_SET request

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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>
This commit is contained in:
Michal Kubecek
2020-03-12 21:08:28 +01:00
committed by David S. Miller
parent e4a1717b67
commit 2fc2929e80
5 changed files with 118 additions and 1 deletions
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1
include/uapi/linux/ethtool_netlink.h
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@@ -29,6 +29,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_GET,
ETHTOOL_MSG_PRIVFLAGS_SET,
ETHTOOL_MSG_RINGS_GET,
ETHTOOL_MSG_RINGS_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,