bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
{
return READ_ONCE(xs->rx) && READ_ONCE(xs->umem) &&
- READ_ONCE(xs->umem->fq);
+ (xs->pool->fq || READ_ONCE(xs->fq_tmp));
}
void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool)
if (umem->need_wakeup & XDP_WAKEUP_RX)
return;
- umem->fq->ring->flags |= XDP_RING_NEED_WAKEUP;
+ pool->fq->ring->flags |= XDP_RING_NEED_WAKEUP;
umem->need_wakeup |= XDP_WAKEUP_RX;
}
EXPORT_SYMBOL(xsk_set_rx_need_wakeup);
if (!(umem->need_wakeup & XDP_WAKEUP_RX))
return;
- umem->fq->ring->flags &= ~XDP_RING_NEED_WAKEUP;
+ pool->fq->ring->flags &= ~XDP_RING_NEED_WAKEUP;
umem->need_wakeup &= ~XDP_WAKEUP_RX;
}
EXPORT_SYMBOL(xsk_clear_rx_need_wakeup);
static void xsk_flush(struct xdp_sock *xs)
{
xskq_prod_submit(xs->rx);
- __xskq_cons_release(xs->umem->fq);
+ __xskq_cons_release(xs->pool->fq);
sock_def_readable(&xs->sk);
}
void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
{
- xskq_prod_submit_n(pool->umem->cq, nb_entries);
+ xskq_prod_submit_n(pool->cq, nb_entries);
}
EXPORT_SYMBOL(xsk_tx_completed);
* if there is space in it. This avoids having to implement
* any buffering in the Tx path.
*/
- if (xskq_prod_reserve_addr(umem->cq, desc->addr))
+ if (xskq_prod_reserve_addr(pool->cq, desc->addr))
goto out;
xskq_cons_release(xs->tx);
unsigned long flags;
spin_lock_irqsave(&xs->tx_completion_lock, flags);
- xskq_prod_submit_addr(xs->umem->cq, addr);
+ xskq_prod_submit_addr(xs->pool->cq, addr);
spin_unlock_irqrestore(&xs->tx_completion_lock, flags);
sock_wfree(skb);
* if there is space in it. This avoids having to implement
* any buffering in the Tx path.
*/
- if (unlikely(err) || xskq_prod_reserve(xs->umem->cq)) {
+ if (unlikely(err) || xskq_prod_reserve(xs->pool->cq)) {
kfree_skb(skb);
goto out;
}
xskq_destroy(xs->rx);
xskq_destroy(xs->tx);
+ xskq_destroy(xs->fq_tmp);
+ xskq_destroy(xs->cq_tmp);
sock_orphan(sk);
sock->sk = NULL;
return sock;
}
+static bool xsk_validate_queues(struct xdp_sock *xs)
+{
+ return xs->fq_tmp && xs->cq_tmp;
+}
+
static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
struct sockaddr_xdp *sxdp = (struct sockaddr_xdp *)addr;
goto out_unlock;
}
+ if (xs->fq_tmp || xs->cq_tmp) {
+ /* Do not allow setting your own fq or cq. */
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
sock = xsk_lookup_xsk_from_fd(sxdp->sxdp_shared_umem_fd);
if (IS_ERR(sock)) {
err = PTR_ERR(sock);
xdp_get_umem(umem_xs->umem);
WRITE_ONCE(xs->umem, umem_xs->umem);
sockfd_put(sock);
- } else if (!xs->umem || !xdp_umem_validate_queues(xs->umem)) {
+ } else if (!xs->umem || !xsk_validate_queues(xs)) {
err = -EINVAL;
goto out_unlock;
} else {
return -EINVAL;
}
- q = (optname == XDP_UMEM_FILL_RING) ? &xs->umem->fq :
- &xs->umem->cq;
+ q = (optname == XDP_UMEM_FILL_RING) ? &xs->fq_tmp :
+ &xs->cq_tmp;
err = xsk_init_queue(entries, q, true);
- if (optname == XDP_UMEM_FILL_RING)
- xp_set_fq(xs->pool, *q);
mutex_unlock(&xs->mutex);
return err;
}
if (extra_stats) {
stats.rx_ring_full = xs->rx_queue_full;
stats.rx_fill_ring_empty_descs =
- xs->umem ? xskq_nb_queue_empty_descs(xs->umem->fq) : 0;
+ xs->pool ? xskq_nb_queue_empty_descs(xs->pool->fq) : 0;
stats.tx_ring_empty_descs = xskq_nb_queue_empty_descs(xs->tx);
} else {
stats.rx_dropped += xs->rx_queue_full;
unsigned long size = vma->vm_end - vma->vm_start;
struct xdp_sock *xs = xdp_sk(sock->sk);
struct xsk_queue *q = NULL;
- struct xdp_umem *umem;
unsigned long pfn;
struct page *qpg;
} else if (offset == XDP_PGOFF_TX_RING) {
q = READ_ONCE(xs->tx);
} else {
- umem = READ_ONCE(xs->umem);
- if (!umem)
- return -EINVAL;
-
/* Matches the smp_wmb() in XDP_UMEM_REG */
smp_rmb();
if (offset == XDP_UMEM_PGOFF_FILL_RING)
- q = READ_ONCE(umem->fq);
+ q = READ_ONCE(xs->fq_tmp);
else if (offset == XDP_UMEM_PGOFF_COMPLETION_RING)
- q = READ_ONCE(umem->cq);
+ q = READ_ONCE(xs->cq_tmp);
}
if (!q)
static int xsk_diag_put_umem(const struct xdp_sock *xs, struct sk_buff *nlskb)
{
+ struct xsk_buff_pool *pool = xs->pool;
struct xdp_umem *umem = xs->umem;
struct xdp_diag_umem du = {};
int err;
err = nla_put(nlskb, XDP_DIAG_UMEM, sizeof(du), &du);
- if (!err && umem->fq)
- err = xsk_diag_put_ring(umem->fq, XDP_DIAG_UMEM_FILL_RING, nlskb);
- if (!err && umem->cq) {
- err = xsk_diag_put_ring(umem->cq, XDP_DIAG_UMEM_COMPLETION_RING,
+ if (!err && pool->fq)
+ err = xsk_diag_put_ring(pool->fq,
+ XDP_DIAG_UMEM_FILL_RING, nlskb);
+ if (!err && pool->cq) {
+ err = xsk_diag_put_ring(pool->cq, XDP_DIAG_UMEM_COMPLETION_RING,
nlskb);
}
return err;
du.n_rx_dropped = xs->rx_dropped;
du.n_rx_invalid = xskq_nb_invalid_descs(xs->rx);
du.n_rx_full = xs->rx_queue_full;
- du.n_fill_ring_empty = xs->umem ? xskq_nb_queue_empty_descs(xs->umem->fq) : 0;
+ du.n_fill_ring_empty = xs->pool ? xskq_nb_queue_empty_descs(xs->pool->fq) : 0;
du.n_tx_invalid = xskq_nb_invalid_descs(xs->tx);
du.n_tx_ring_empty = xskq_nb_queue_empty_descs(xs->tx);
return nla_put(nlskb, XDP_DIAG_STATS, sizeof(du), &du);