diff options
| author | Tirthendu Sarkar <tirthendu.sarkar@intel.com> | 2023-09-07 09:20:32 +0530 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-09-15 11:00:22 -0700 |
| commit | d609f3d228a8efe991f44f11f24146e2a5209755 (patch) | |
| tree | f10ff9bcf0ad8b1fb5eccbb30275c2aa56f35629 /net/xdp | |
| parent | 5c04433daf9ed8b28d4900112be1fd19e1786b25 (diff) | |
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: 81470b5c3c66 ("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>
Diffstat (limited to 'net/xdp')
| -rw-r--r-- | net/xdp/xsk.c | 2 | ||||
| -rw-r--r-- | net/xdp/xsk_buff_pool.c | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 55f8b9b0e06d..7482d0aca504 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -1228,7 +1228,7 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len) xs->dev = dev; xs->zc = xs->umem->zc; - xs->sg = !!(flags & XDP_USE_SG); + xs->sg = !!(xs->umem->flags & XDP_UMEM_SG_FLAG); xs->queue_id = qid; xp_add_xsk(xs->pool, xs); diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c index b3f7b310811e..49cb9f9a09be 100644 --- a/net/xdp/xsk_buff_pool.c +++ b/net/xdp/xsk_buff_pool.c @@ -170,6 +170,9 @@ int xp_assign_dev(struct xsk_buff_pool *pool, if (err) return err; + if (flags & XDP_USE_SG) + pool->umem->flags |= XDP_UMEM_SG_FLAG; + if (flags & XDP_USE_NEED_WAKEUP) pool->uses_need_wakeup = true; /* Tx needs to be explicitly woken up the first time. Also |