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xsk: Inherit need_wakeup flag for shared sockets 

The flag for need_wakeup is not set for xsks with `XDP_SHARED_UMEM`
flag and of different queue ids and/or devices. They should inherit
the flag from the first socket buffer pool since no flags can be
specified once `XDP_SHARED_UMEM` is specified.

Fixes: b5aea28dca ("xsk: Add shared umem support between queue ids")
Signed-off-by: Jalal Mostafa <jalal.a.mostapha@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20220921135701.10199-1-jalal.a.mostapha@gmail.com
This commit is contained in:
Jalal Mostafa 2022-09-21 13:57:01 +00:00 committed by Daniel Borkmann
parent 8addbfc7b3
commit 60240bc261
3 changed files with 6 additions and 5 deletions
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2
include/net/xsk_buff_pool.h
View File

@ -95,7 +95,7 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
struct xdp_umem *umem);
int xp_assign_dev(struct xsk_buff_pool *pool, struct net_device *dev,
u16 queue_id, u16 flags);
int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_umem *umem,
int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_sock *umem_xs,
struct net_device *dev, u16 queue_id);
int xp_alloc_tx_descs(struct xsk_buff_pool *pool, struct xdp_sock *xs);
void xp_destroy(struct xsk_buff_pool *pool);

4
net/xdp/xsk.c
View File

@ -954,8 +954,8 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
goto out_unlock;
}
err = xp_assign_dev_shared(xs->pool, umem_xs->umem,
dev, qid);
err = xp_assign_dev_shared(xs->pool, umem_xs, dev,
qid);
if (err) {
xp_destroy(xs->pool);
xs->pool = NULL;

5
net/xdp/xsk_buff_pool.c
View File

@ -212,17 +212,18 @@ int xp_assign_dev(struct xsk_buff_pool *pool,
return err;
}
int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_umem *umem,
int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_sock *umem_xs,
struct net_device *dev, u16 queue_id)
{
u16 flags;
struct xdp_umem *umem = umem_xs->umem;
/* One fill and completion ring required for each queue id. */
if (!pool->fq || !pool->cq)
return -EINVAL;
flags = umem->zc ? XDP_ZEROCOPY : XDP_COPY;
if (pool->uses_need_wakeup)
if (umem_xs->pool->uses_need_wakeup)
flags |= XDP_USE_NEED_WAKEUP;
return xp_assign_dev(pool, dev, queue_id, flags);