From: Parav Pandit <parav@nvidia.com>
Date: Wed, 26 May 2021 23:00:27 +0300
Subject: devlink: Correct VIRTUAL port to not have phys_port attributes
Patch-mainline: v5.13-rc5
Git-commit: b28d8f0c25a9b0355116cace5f53ea52bd4020c8
References: jsc#SLE-15172
Physical port name, port number attributes do not belong to virtual port
flavour. When VF or SF virtual ports are registered they incorrectly
append "np0" string in the netdevice name of the VF/SF.
Before this fix, VF netdevice name were ens2f0np0v0, ens2f0np0v1 for VF
0 and 1 respectively.
After the fix, they are ens2f0v0, ens2f0v1.
With this fix, reading /sys/class/net/ens2f0v0/phys_port_name returns
-EOPNOTSUPP.
Also devlink port show example for 2 VFs on one PF to ensure that any
physical port attributes are not exposed.
$ devlink port show
pci/0000:06:00.0/65535: type eth netdev ens2f0np0 flavour physical port 0 splittable false
pci/0000:06:00.3/196608: type eth netdev ens2f0v0 flavour virtual splittable false
pci/0000:06:00.4/262144: type eth netdev ens2f0v1 flavour virtual splittable false
This change introduces a netdevice name change on systemd/udev
version 245 and higher which honors phys_port_name sysfs file for
generation of netdevice name.
This also aligns to phys_port_name usage which is limited to switchdev
ports as described in [1].
[1] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/Documentation/networking/switchdev.rst
Fixes: acf1ee44ca5d ("devlink: Introduce devlink port flavour virtual")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20210526200027.14008-1-parav@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
net/core/devlink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -542,7 +542,6 @@ static int devlink_nl_port_attrs_put(str
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
- case DEVLINK_PORT_FLAVOUR_VIRTUAL:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
attrs->phys.port_number))
return -EMSGSIZE;
@@ -7880,7 +7879,6 @@ static int __devlink_port_phys_port_name
switch (attrs->flavour) {
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
- case DEVLINK_PORT_FLAVOUR_VIRTUAL:
if (!attrs->split)
n = snprintf(name, len, "p%u", attrs->phys.port_number);
else
@@ -7902,6 +7900,8 @@ static int __devlink_port_phys_port_name
n = snprintf(name, len, "pf%uvf%u",
attrs->pci_vf.pf, attrs->pci_vf.vf);
break;
+ case DEVLINK_PORT_FLAVOUR_VIRTUAL:
+ return -EOPNOTSUPP;
}
if (n >= len)