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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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0caa9a8dde
When a process in a container wants to setup a memory provider, it will
use the virtual netdev and a leased rxq, and call net_mp_{open,close}_rxq
to try and restart the queue. At this point, proxy the queue restart on
the real rxq in the physical netdev.
For memory providers (io_uring zero-copy rx and devmem), it causes the
real rxq in the physical netdev to be filled from a memory provider that
has DMA mapped memory from a process within a container.
Signed-off-by: David Wei <dw@davidwei.uk>
Co-developed-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260115082603.219152-6-daniel@iogearbox.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_PAGE_POOL_MEMORY_PROVIDER_H
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#define _NET_PAGE_POOL_MEMORY_PROVIDER_H
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#include <net/netmem.h>
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#include <net/page_pool/types.h>
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struct netdev_rx_queue;
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struct netlink_ext_ack;
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struct sk_buff;
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struct memory_provider_ops {
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netmem_ref (*alloc_netmems)(struct page_pool *pool, gfp_t gfp);
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bool (*release_netmem)(struct page_pool *pool, netmem_ref netmem);
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int (*init)(struct page_pool *pool);
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void (*destroy)(struct page_pool *pool);
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int (*nl_fill)(void *mp_priv, struct sk_buff *rsp,
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struct netdev_rx_queue *rxq);
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void (*uninstall)(void *mp_priv, struct netdev_rx_queue *rxq);
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};
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bool net_mp_niov_set_dma_addr(struct net_iov *niov, dma_addr_t addr);
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void net_mp_niov_set_page_pool(struct page_pool *pool, struct net_iov *niov);
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void net_mp_niov_clear_page_pool(struct net_iov *niov);
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int net_mp_open_rxq(struct net_device *dev, unsigned int rxq_idx,
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struct pp_memory_provider_params *p);
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int __net_mp_open_rxq(struct net_device *dev, unsigned int rxq_idx,
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const struct pp_memory_provider_params *p,
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struct netlink_ext_ack *extack);
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void net_mp_close_rxq(struct net_device *dev, unsigned int rxq_idx,
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struct pp_memory_provider_params *old_p);
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void __net_mp_close_rxq(struct net_device *dev, unsigned int rxq_idx,
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const struct pp_memory_provider_params *old_p);
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/**
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* net_mp_netmem_place_in_cache() - give a netmem to a page pool
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* @pool: the page pool to place the netmem into
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* @netmem: netmem to give
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*
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* Push an accounted netmem into the page pool's allocation cache. The caller
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* must ensure that there is space in the cache. It should only be called off
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* the mp_ops->alloc_netmems() path.
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*/
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static inline void net_mp_netmem_place_in_cache(struct page_pool *pool,
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netmem_ref netmem)
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{
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pool->alloc.cache[pool->alloc.count++] = netmem;
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}
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#endif
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