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d04686d9bc
Implement netdev_nl_queue_create_doit which creates a new rx queue in a
virtual netdev and then leases it to a rx queue in a physical netdev.
Example with ynl client:
# ynl --family netdev --output-json --do queue-create \
--json '{"ifindex": 8, "type": "rx", "lease": {"ifindex": 4, "queue": {"type": "rx", "id": 15}}}'
{'id': 1}
Note that the netdevice locking order is always from the virtual to
the physical device.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Co-developed-by: David Wei <dw@davidwei.uk>
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260402231031.447597-3-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_NETDEV_RX_QUEUE_H
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#define _LINUX_NETDEV_RX_QUEUE_H
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#include <linux/kobject.h>
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#include <linux/netdevice.h>
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#include <linux/sysfs.h>
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#include <net/xdp.h>
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#include <net/page_pool/types.h>
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#include <net/netdev_queues.h>
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#include <net/rps-types.h>
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/* This structure contains an instance of an RX queue. */
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struct netdev_rx_queue {
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struct xdp_rxq_info xdp_rxq;
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#ifdef CONFIG_RPS
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struct rps_map __rcu *rps_map;
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rps_tag_ptr rps_flow_table;
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#endif
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struct kobject kobj;
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const struct attribute_group **groups;
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struct net_device *dev;
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netdevice_tracker dev_tracker;
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/* All fields below are "ops protected",
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* see comment about net_device::lock
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*/
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#ifdef CONFIG_XDP_SOCKETS
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struct xsk_buff_pool *pool;
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#endif
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struct napi_struct *napi;
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struct netdev_queue_config qcfg;
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struct pp_memory_provider_params mp_params;
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/* If a queue is leased, then the lease pointer is always
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* valid. From the physical device it points to the virtual
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* queue, and from the virtual device it points to the
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* physical queue.
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*/
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struct netdev_rx_queue *lease;
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netdevice_tracker lease_tracker;
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} ____cacheline_aligned_in_smp;
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/*
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* RX queue sysfs structures and functions.
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*/
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struct rx_queue_attribute {
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struct attribute attr;
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ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
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ssize_t (*store)(struct netdev_rx_queue *queue,
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const char *buf, size_t len);
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};
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static inline struct netdev_rx_queue *
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__netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
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{
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return dev->_rx + rxq;
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}
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static inline unsigned int
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get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
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{
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struct net_device *dev = queue->dev;
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int index = queue - dev->_rx;
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BUG_ON(index >= dev->num_rx_queues);
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return index;
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}
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int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq);
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void netdev_rx_queue_lease(struct netdev_rx_queue *rxq_dst,
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struct netdev_rx_queue *rxq_src);
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void netdev_rx_queue_unlease(struct netdev_rx_queue *rxq_dst,
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struct netdev_rx_queue *rxq_src);
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#endif /* _LINUX_NETDEV_RX_QUEUE_H */
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