linux-stable/net/xdp
Tirthendu Sarkar d609f3d228 xsk: add multi-buffer support for sockets sharing umem
Userspace applications indicate their multi-buffer capability to xsk
using XSK_USE_SG socket bind flag. For sockets using shared umem the
bind flag may contain XSK_USE_SG only for the first socket. For any
subsequent socket the only option supported is XDP_SHARED_UMEM.

Add option XDP_UMEM_SG_FLAG in umem config flags to store the
multi-buffer handling capability when indicated by XSK_USE_SG option in
bing flag by the first socket. Use this to derive multi-buffer capability
for subsequent sockets in xsk core.

Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com>
Fixes: 81470b5c3c ("xsk: introduce XSK_USE_SG bind flag for xsk socket")
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230907035032.2627879-1-tirthendu.sarkar@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-09-15 11:00:22 -07:00
..
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 mm/gup: remove vmas parameter from pin_user_pages() 2023-06-09 16:25:26 -07:00
xdp_umem.h xsk: Fix umem cleanup bug at socket destruct 2020-11-20 15:52:39 +01:00
xsk.c xsk: add multi-buffer support for sockets sharing umem 2023-09-15 11:00:22 -07:00
xsk.h xdp: Add proper __rcu annotations to redirect map entries 2021-06-24 19:41:15 +02:00
xsk_buff_pool.c xsk: add multi-buffer support for sockets sharing umem 2023-09-15 11:00:22 -07:00
xsk_diag.c xsk: Fix xsk_diag use-after-free error during socket cleanup 2023-08-31 13:21:11 +02:00
xsk_queue.c xsk: support use vaddr as ring 2023-02-20 08:22:12 +00:00
xsk_queue.h xsk: support ZC Tx multi-buffer in batch API 2023-07-19 09:56:50 -07:00
xskmap.c bpf: Centralize permissions checks for all BPF map types 2023-06-19 14:04:04 +02:00