@@ -701,14 +701,11 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
sockfd_put(sock);
goto out_unlock;
}
- if (umem_xs->dev != dev) {
- err = -EINVAL;
- sockfd_put(sock);
- goto out_unlock;
- }
- if (umem_xs->queue_id != qid) {
- /* Share the umem with another socket on another qid */
+ if (umem_xs->queue_id != qid || umem_xs->dev != dev) {
+ /* Share the umem with another socket on another qid
+ * and/or device.
+ */
xs->pool = xp_create_and_assign_umem(xs,
umem_xs->umem);
if (!xs->pool) {
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> --- net/xdp/xsk.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)