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b789acc069
Implement rtnl_link_ops->alloc that allows the number of rx queues to be
set when netkit is created. By default, netkit has only a single rxq (and
single txq). The number of queues is deliberately not allowed to be changed
via ethtool -L and is fixed for the lifetime of a netkit instance.
For netkit device creation, numrxqueues with larger than one rxq can be
specified. These rxqs are leasable to real rxqs in physical netdevs:
ip link add type netkit peer numrxqueues 64 # for device pair
ip link add numrxqueues 64 type netkit single # for single device
The limit of numrxqueues for netkit is currently set to 1024, which allows
leasing multiple real rxqs from physical netdevs.
The implementation of ndo_queue_create() adds a new rxq during the queue
lease operation. We allow to create queues either in single device mode
or for the case of dual device mode for the netkit peer device which gets
placed into the target network namespace. For dual device mode the lease
against the primary device does not make sense for the targeted use cases,
and therefore gets rejected.
We also need to add a lockdep class for netkit, such that lockdep does
not trip over us, similarly done as in commit
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| MAINTAINERS | ||
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| README | ||
Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. 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