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authorMagnus Karlsson <magnus.karlsson@intel.com>2018-05-02 13:01:26 +0200
committerAlexei Starovoitov <ast@kernel.org>2018-05-03 15:55:23 -0700
commit965a990984432cd01a9eb3514c64d86f56704295 (patch)
treee5fe0883da83cbc9f69f297f3b5090f74222404e /net/xdp/xdp_umem.c
parentb9b6b68e8abd101be6eb5330e4999218c696d1e8 (diff)
downloadlinux-965a990984432cd01a9eb3514c64d86f56704295.tar.bz2
xsk: add support for bind for Rx
Here, the bind syscall is added. Binding an AF_XDP socket, means associating the socket to an umem, a netdev and a queue index. This can be done in two ways. The first way, creating a "socket from scratch". Create the umem using the XDP_UMEM_REG setsockopt and an associated fill queue with XDP_UMEM_FILL_QUEUE. Create the Rx queue using the XDP_RX_QUEUE setsockopt. Call bind passing ifindex and queue index ("channel" in ethtool speak). The second way to bind a socket, is simply skipping the umem/netdev/queue index, and passing another already setup AF_XDP socket. The new socket will then have the same umem/netdev/queue index as the parent so it will share the same umem. You must also set the flags field in the socket address to XDP_SHARED_UMEM. v2: Use PTR_ERR instead of passing error variable explicitly. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/xdp/xdp_umem.c')
-rw-r--r--net/xdp/xdp_umem.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index e1f627d0cc1c..9bac1ad570fa 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -248,3 +248,8 @@ out:
put_pid(umem->pid);
return err;
}
+
+bool xdp_umem_validate_queues(struct xdp_umem *umem)
+{
+ return umem->fq;
+}