linux-stable/net/xdp
Magnus Karlsson a1132430c2 xsk: Add shared umem support between devices
Add support to share a umem between different devices. This mode
can be invoked with the XDP_SHARED_UMEM bind flag. Previously,
sharing was only supported within the same device. Note that when
sharing a umem between devices, just as in the case of sharing a
umem between queue ids, you need to create a fill ring and a
completion ring and tie them to the socket (with two setsockopts,
one for each ring) before you do the bind with the
XDP_SHARED_UMEM flag. This so that the single-producer
single-consumer semantics of the rings can be upheld.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/1598603189-32145-13-git-send-email-magnus.karlsson@intel.com
2020-08-31 21:15:04 +02:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile xsk: Introduce AF_XDP buffer allocation API 2020-05-21 17:31:26 -07:00
xdp_umem.c xsk: Enable sharing of dma mappings 2020-08-31 21:15:04 +02:00
xdp_umem.h xsk: Move xsk_tx_list and its lock to buffer pool 2020-08-31 21:15:04 +02:00
xsk.c xsk: Add shared umem support between devices 2020-08-31 21:15:04 +02:00
xsk.h xsk: Move queue_id, dev and need_wakeup to buffer pool 2020-08-31 21:15:04 +02:00
xsk_buff_pool.c xsk: Add shared umem support between queue ids 2020-08-31 21:15:04 +02:00
xsk_diag.c xsk: Move queue_id, dev and need_wakeup to buffer pool 2020-08-31 21:15:04 +02:00
xsk_queue.c xsk: Remove MEM_TYPE_ZERO_COPY and corresponding code 2020-05-21 17:31:27 -07:00
xsk_queue.h xsk: Create and free buffer pool independently from umem 2020-08-31 21:15:04 +02:00
xskmap.c bpf: Relax max_entries check for most of the inner map types 2020-08-28 15:41:30 +02:00