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net-shapers: implement NL get operation

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Introduce the basic infrastructure to implement the net-shaper
core functionality. Each network devices carries a net-shaper cache,
the NL get() operation fetches the data from such cache.

The cache is initially empty, will be fill by the set()/group()
operation implemented later and is destroyed at device cleanup time.

The net_shaper_fill_handle(), net_shaper_ctx_init(), and
net_shaper_generic_pre() implementations handle generic index type
attributes, despite the current caller always pass a constant value
to avoid more noise in later patches using them with different
attributes.

Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/ddd10fd645a9367803ad02fca4a5664ea5ace170.1728460186.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni
2024-10-09 10:09:49 +02:00
committed by Jakub Kicinski
parent 04e65df94b
commit 4b623f9f0f
6 changed files with 484 additions and 7 deletions
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6
net/core/dev.c
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@@ -11147,6 +11147,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
hash_init(dev->qdisc_hash);
#endif
mutex_init(&dev->lock);
dev->priv_flags = IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM;
setup(dev);
@@ -11217,6 +11219,8 @@ void free_netdev(struct net_device *dev)
return;
}
mutex_destroy(&dev->lock);
kfree(dev->ethtool);
netif_free_tx_queues(dev);
netif_free_rx_queues(dev);
@@ -11426,6 +11430,8 @@ void unregister_netdevice_many_notify(struct list_head *head,
mutex_destroy(&dev->ethtool->rss_lock);
net_shaper_flush_netdev(dev);
if (skb)
rtmsg_ifinfo_send(skb, dev, GFP_KERNEL, portid, nlh);